vc1: Split the decoder in components

Speed up the overall compilation time.

1 files changed, 4 insertions, 5207 deletions

diff --git a/libavcodec/vc1dec.c b/libavcodec/vc1dec.c
index 7eb85490e4..610b13e0b3 100644
--- a/libavcodec/vc1dec.c
+++ b/libavcodec/vc1dec.c
@@ -26,5218 +26,15 @@
  * VC-1 and WMV3 decoder
  */
 
-#include "internal.h"
 #include "avcodec.h"
-#include "error_resilience.h"
+#include "blockdsp.h"
+#include "get_bits.h"
+#include "internal.h"
 #include "mpeg_er.h"
-#include "mpegutils.h"
 #include "mpegvideo.h"
-#include "h263.h"
-#include "h264chroma.h"
-#include "qpeldsp.h"
+#include "msmpeg4data.h"
 #include "vc1.h"
 #include "vc1data.h"
-#include "vc1acdata.h"
-#include "msmpeg4data.h"
-#include "unary.h"
-#include "mathops.h"
-
-#undef NDEBUG
-#include <assert.h>
-
-#define MB_INTRA_VLC_BITS 9
-#define DC_VLC_BITS 9
-
-
-// offset tables for interlaced picture MVDATA decoding
-static const int offset_table1[9] = {  0,  1,  2,  4,  8, 16, 32,  64, 128 };
-static const int offset_table2[9] = {  0,  1,  3,  7, 15, 31, 63, 127, 255 };
-
-/***********************************************************************/
-/**
- * @name VC-1 Bitplane decoding
- * @see 8.7, p56
- * @{
- */
-
-/**
- * Imode types
- * @{
- */
-enum Imode {
-    IMODE_RAW,
-    IMODE_NORM2,
-    IMODE_DIFF2,
-    IMODE_NORM6,
-    IMODE_DIFF6,
-    IMODE_ROWSKIP,
-    IMODE_COLSKIP
-};
-/** @} */ //imode defines
-
-static void init_block_index(VC1Context *v)
-{
-    MpegEncContext *s = &v->s;
-    ff_init_block_index(s);
-    if (v->field_mode && !(v->second_field ^ v->tff)) {
-        s->dest[0] += s->current_picture_ptr->f->linesize[0];
-        s->dest[1] += s->current_picture_ptr->f->linesize[1];
-        s->dest[2] += s->current_picture_ptr->f->linesize[2];
-    }
-}
-
-/** @} */ //Bitplane group
-
-static void vc1_put_signed_blocks_clamped(VC1Context *v)
-{
-    MpegEncContext *s = &v->s;
-    int topleft_mb_pos, top_mb_pos;
-    int stride_y, fieldtx = 0;
-    int v_dist;
-
-    /* The put pixels loop is always one MB row behind the decoding loop,
-     * because we can only put pixels when overlap filtering is done, and
-     * for filtering of the bottom edge of a MB, we need the next MB row
-     * present as well.
-     * Within the row, the put pixels loop is also one MB col behind the
-     * decoding loop. The reason for this is again, because for filtering
-     * of the right MB edge, we need the next MB present. */
-    if (!s->first_slice_line) {
-        if (s->mb_x) {
-            topleft_mb_pos = (s->mb_y - 1) * s->mb_stride + s->mb_x - 1;
-            if (v->fcm == ILACE_FRAME)
-                fieldtx = v->fieldtx_plane[topleft_mb_pos];
-            stride_y       = s->linesize << fieldtx;
-            v_dist         = (16 - fieldtx) >> (fieldtx == 0);
-            s->idsp.put_signed_pixels_clamped(v->block[v->topleft_blk_idx][0],
-                                              s->dest[0] - 16 * s->linesize - 16,
-                                              stride_y);
-            s->idsp.put_signed_pixels_clamped(v->block[v->topleft_blk_idx][1],
-                                              s->dest[0] - 16 * s->linesize - 8,
-                                              stride_y);
-            s->idsp.put_signed_pixels_clamped(v->block[v->topleft_blk_idx][2],
-                                              s->dest[0] - v_dist * s->linesize - 16,
-                                              stride_y);
-            s->idsp.put_signed_pixels_clamped(v->block[v->topleft_blk_idx][3],
-                                              s->dest[0] - v_dist * s->linesize - 8,
-                                              stride_y);
-            s->idsp.put_signed_pixels_clamped(v->block[v->topleft_blk_idx][4],
-                                              s->dest[1] - 8 * s->uvlinesize - 8,
-                                              s->uvlinesize);
-            s->idsp.put_signed_pixels_clamped(v->block[v->topleft_blk_idx][5],
-                                              s->dest[2] - 8 * s->uvlinesize - 8,
-                                              s->uvlinesize);
-        }
-        if (s->mb_x == s->mb_width - 1) {
-            top_mb_pos = (s->mb_y - 1) * s->mb_stride + s->mb_x;
-            if (v->fcm == ILACE_FRAME)
-                fieldtx = v->fieldtx_plane[top_mb_pos];
-            stride_y   = s->linesize << fieldtx;
-            v_dist     = fieldtx ? 15 : 8;
-            s->idsp.put_signed_pixels_clamped(v->block[v->top_blk_idx][0],
-                                              s->dest[0] - 16 * s->linesize,
-                                              stride_y);
-            s->idsp.put_signed_pixels_clamped(v->block[v->top_blk_idx][1],
-                                              s->dest[0] - 16 * s->linesize + 8,
-                                              stride_y);
-            s->idsp.put_signed_pixels_clamped(v->block[v->top_blk_idx][2],
-                                              s->dest[0] - v_dist * s->linesize,
-                                              stride_y);
-            s->idsp.put_signed_pixels_clamped(v->block[v->top_blk_idx][3],
-                                              s->dest[0] - v_dist * s->linesize + 8,
-                                              stride_y);
-            s->idsp.put_signed_pixels_clamped(v->block[v->top_blk_idx][4],
-                                              s->dest[1] - 8 * s->uvlinesize,
-                                              s->uvlinesize);
-            s->idsp.put_signed_pixels_clamped(v->block[v->top_blk_idx][5],
-                                              s->dest[2] - 8 * s->uvlinesize,
-                                              s->uvlinesize);
-        }
-    }
-
-#define inc_blk_idx(idx) do { \
-        idx++; \
-        if (idx >= v->n_allocated_blks) \
-            idx = 0; \
-    } while (0)
-
-    inc_blk_idx(v->topleft_blk_idx);
-    inc_blk_idx(v->top_blk_idx);
-    inc_blk_idx(v->left_blk_idx);
-    inc_blk_idx(v->cur_blk_idx);
-}
-
-static void vc1_loop_filter_iblk(VC1Context *v, int pq)
-{
-    MpegEncContext *s = &v->s;
-    int j;
-    if (!s->first_slice_line) {
-        v->vc1dsp.vc1_v_loop_filter16(s->dest[0], s->linesize, pq);
-        if (s->mb_x)
-            v->vc1dsp.vc1_h_loop_filter16(s->dest[0] - 16 * s->linesize, s->linesize, pq);
-        v->vc1dsp.vc1_h_loop_filter16(s->dest[0] - 16 * s->linesize + 8, s->linesize, pq);
-        for (j = 0; j < 2; j++) {
-            v->vc1dsp.vc1_v_loop_filter8(s->dest[j + 1], s->uvlinesize, pq);
-            if (s->mb_x)
-                v->vc1dsp.vc1_h_loop_filter8(s->dest[j + 1] - 8 * s->uvlinesize, s->uvlinesize, pq);
-        }
-    }
-    v->vc1dsp.vc1_v_loop_filter16(s->dest[0] + 8 * s->linesize, s->linesize, pq);
-
-    if (s->mb_y == s->end_mb_y - 1) {
-        if (s->mb_x) {
-            v->vc1dsp.vc1_h_loop_filter16(s->dest[0], s->linesize, pq);
-            v->vc1dsp.vc1_h_loop_filter8(s->dest[1], s->uvlinesize, pq);
-            v->vc1dsp.vc1_h_loop_filter8(s->dest[2], s->uvlinesize, pq);
-        }
-        v->vc1dsp.vc1_h_loop_filter16(s->dest[0] + 8, s->linesize, pq);
-    }
-}
-
-static void vc1_loop_filter_iblk_delayed(VC1Context *v, int pq)
-{
-    MpegEncContext *s = &v->s;
-    int j;
-
-    /* The loopfilter runs 1 row and 1 column behind the overlap filter, which
-     * means it runs two rows/cols behind the decoding loop. */
-    if (!s->first_slice_line) {
-        if (s->mb_x) {
-            if (s->mb_y >= s->start_mb_y + 2) {
-                v->vc1dsp.vc1_v_loop_filter16(s->dest[0] - 16 * s->linesize - 16, s->linesize, pq);
-
-                if (s->mb_x >= 2)
-                    v->vc1dsp.vc1_h_loop_filter16(s->dest[0] - 32 * s->linesize - 16, s->linesize, pq);
-                v->vc1dsp.vc1_h_loop_filter16(s->dest[0] - 32 * s->linesize - 8, s->linesize, pq);
-                for (j = 0; j < 2; j++) {
-                    v->vc1dsp.vc1_v_loop_filter8(s->dest[j + 1] - 8 * s->uvlinesize - 8, s->uvlinesize, pq);
-                    if (s->mb_x >= 2) {
-                        v->vc1dsp.vc1_h_loop_filter8(s->dest[j + 1] - 16 * s->uvlinesize - 8, s->uvlinesize, pq);
-                    }
-                }
-            }
-            v->vc1dsp.vc1_v_loop_filter16(s->dest[0] - 8 * s->linesize - 16, s->linesize, pq);
-        }
-
-        if (s->mb_x == s->mb_width - 1) {
-            if (s->mb_y >= s->start_mb_y + 2) {
-                v->vc1dsp.vc1_v_loop_filter16(s->dest[0] - 16 * s->linesize, s->linesize, pq);
-
-                if (s->mb_x)
-                    v->vc1dsp.vc1_h_loop_filter16(s->dest[0] - 32 * s->linesize, s->linesize, pq);
-                v->vc1dsp.vc1_h_loop_filter16(s->dest[0] - 32 * s->linesize + 8, s->linesize, pq);
-                for (j = 0; j < 2; j++) {
-                    v->vc1dsp.vc1_v_loop_filter8(s->dest[j + 1] - 8 * s->uvlinesize, s->uvlinesize, pq);
-                    if (s->mb_x >= 2) {
-                        v->vc1dsp.vc1_h_loop_filter8(s->dest[j + 1] - 16 * s->uvlinesize, s->uvlinesize, pq);
-                    }
-                }
-            }
-            v->vc1dsp.vc1_v_loop_filter16(s->dest[0] - 8 * s->linesize, s->linesize, pq);
-        }
-
-        if (s->mb_y == s->end_mb_y) {
-            if (s->mb_x) {
-                if (s->mb_x >= 2)
-                    v->vc1dsp.vc1_h_loop_filter16(s->dest[0] - 16 * s->linesize - 16, s->linesize, pq);
-                v->vc1dsp.vc1_h_loop_filter16(s->dest[0] - 16 * s->linesize - 8, s->linesize, pq);
-                if (s->mb_x >= 2) {
-                    for (j = 0; j < 2; j++) {
-                        v->vc1dsp.vc1_h_loop_filter8(s->dest[j + 1] - 8 * s->uvlinesize - 8, s->uvlinesize, pq);
-                    }
-                }
-            }
-
-            if (s->mb_x == s->mb_width - 1) {
-                if (s->mb_x)
-                    v->vc1dsp.vc1_h_loop_filter16(s->dest[0] - 16 * s->linesize, s->linesize, pq);
-                v->vc1dsp.vc1_h_loop_filter16(s->dest[0] - 16 * s->linesize + 8, s->linesize, pq);
-                if (s->mb_x) {
-                    for (j = 0; j < 2; j++) {
-                        v->vc1dsp.vc1_h_loop_filter8(s->dest[j + 1] - 8 * s->uvlinesize, s->uvlinesize, pq);
-                    }
-                }
-            }
-        }
-    }
-}
-
-static void vc1_smooth_overlap_filter_iblk(VC1Context *v)
-{
-    MpegEncContext *s = &v->s;
-    int mb_pos;
-
-    if (v->condover == CONDOVER_NONE)
-        return;
-
-    mb_pos = s->mb_x + s->mb_y * s->mb_stride;
-
-    /* Within a MB, the horizontal overlap always runs before the vertical.
-     * To accomplish that, we run the H on left and internal borders of the
-     * currently decoded MB. Then, we wait for the next overlap iteration
-     * to do H overlap on the right edge of this MB, before moving over and
-     * running the V overlap. Therefore, the V overlap makes us trail by one
-     * MB col and the H overlap filter makes us trail by one MB row. This
-     * is reflected in the time at which we run the put_pixels loop. */
-    if (v->condover == CONDOVER_ALL || v->pq >= 9 || v->over_flags_plane[mb_pos]) {
-        if (s->mb_x && (v->condover == CONDOVER_ALL || v->pq >= 9 ||
-                        v->over_flags_plane[mb_pos - 1])) {
-            v->vc1dsp.vc1_h_s_overlap(v->block[v->left_blk_idx][1],
-                                      v->block[v->cur_blk_idx][0]);
-            v->vc1dsp.vc1_h_s_overlap(v->block[v->left_blk_idx][3],
-                                      v->block[v->cur_blk_idx][2]);
-            if (!(s->flags & CODEC_FLAG_GRAY)) {
-                v->vc1dsp.vc1_h_s_overlap(v->block[v->left_blk_idx][4],
-                                          v->block[v->cur_blk_idx][4]);
-                v->vc1dsp.vc1_h_s_overlap(v->block[v->left_blk_idx][5],
-                                          v->block[v->cur_blk_idx][5]);
-            }
-        }
-        v->vc1dsp.vc1_h_s_overlap(v->block[v->cur_blk_idx][0],
-                                  v->block[v->cur_blk_idx][1]);
-        v->vc1dsp.vc1_h_s_overlap(v->block[v->cur_blk_idx][2],
-                                  v->block[v->cur_blk_idx][3]);
-
-        if (s->mb_x == s->mb_width - 1) {
-            if (!s->first_slice_line && (v->condover == CONDOVER_ALL || v->pq >= 9 ||
-                                         v->over_flags_plane[mb_pos - s->mb_stride])) {
-                v->vc1dsp.vc1_v_s_overlap(v->block[v->top_blk_idx][2],
-                                          v->block[v->cur_blk_idx][0]);
-                v->vc1dsp.vc1_v_s_overlap(v->block[v->top_blk_idx][3],
-                                          v->block[v->cur_blk_idx][1]);
-                if (!(s->flags & CODEC_FLAG_GRAY)) {
-                    v->vc1dsp.vc1_v_s_overlap(v->block[v->top_blk_idx][4],
-                                              v->block[v->cur_blk_idx][4]);
-                    v->vc1dsp.vc1_v_s_overlap(v->block[v->top_blk_idx][5],
-                                              v->block[v->cur_blk_idx][5]);
-                }
-            }
-            v->vc1dsp.vc1_v_s_overlap(v->block[v->cur_blk_idx][0],
-                                      v->block[v->cur_blk_idx][2]);
-            v->vc1dsp.vc1_v_s_overlap(v->block[v->cur_blk_idx][1],
-                                      v->block[v->cur_blk_idx][3]);
-        }
-    }
-    if (s->mb_x && (v->condover == CONDOVER_ALL || v->over_flags_plane[mb_pos - 1])) {
-        if (!s->first_slice_line && (v->condover == CONDOVER_ALL || v->pq >= 9 ||
-                                     v->over_flags_plane[mb_pos - s->mb_stride - 1])) {
-            v->vc1dsp.vc1_v_s_overlap(v->block[v->topleft_blk_idx][2],
-                                      v->block[v->left_blk_idx][0]);
-            v->vc1dsp.vc1_v_s_overlap(v->block[v->topleft_blk_idx][3],
-                                      v->block[v->left_blk_idx][1]);
-            if (!(s->flags & CODEC_FLAG_GRAY)) {
-                v->vc1dsp.vc1_v_s_overlap(v->block[v->topleft_blk_idx][4],
-                                          v->block[v->left_blk_idx][4]);
-                v->vc1dsp.vc1_v_s_overlap(v->block[v->topleft_blk_idx][5],
-                                          v->block[v->left_blk_idx][5]);
-            }
-        }
-        v->vc1dsp.vc1_v_s_overlap(v->block[v->left_blk_idx][0],
-                                  v->block[v->left_blk_idx][2]);
-        v->vc1dsp.vc1_v_s_overlap(v->block[v->left_blk_idx][1],
-                                  v->block[v->left_blk_idx][3]);
-    }
-}
-
-/** Do motion compensation over 1 macroblock
- * Mostly adapted hpel_motion and qpel_motion from mpegvideo.c
- */
-static void vc1_mc_1mv(VC1Context *v, int dir)
-{
-    MpegEncContext *s = &v->s;
-    H264ChromaContext *h264chroma = &v->h264chroma;
-    uint8_t *srcY, *srcU, *srcV;
-    int dxy, mx, my, uvmx, uvmy, src_x, src_y, uvsrc_x, uvsrc_y;
-    int v_edge_pos = s->v_edge_pos >> v->field_mode;
-    int i;
-    uint8_t (*luty)[256], (*lutuv)[256];
-    int use_ic;
-
-    if ((!v->field_mode ||
-         (v->ref_field_type[dir] == 1 && v->cur_field_type == 1)) &&
-        !v->s.last_picture.f->data[0])
-        return;
-
-    mx = s->mv[dir][0][0];
-    my = s->mv[dir][0][1];
-
-    // store motion vectors for further use in B frames
-    if (s->pict_type == AV_PICTURE_TYPE_P) {
-        for (i = 0; i < 4; i++) {
-            s->current_picture.motion_val[1][s->block_index[i] + v->blocks_off][0] = mx;
-            s->current_picture.motion_val[1][s->block_index[i] + v->blocks_off][1] = my;
-        }
-    }
-
-    uvmx = (mx + ((mx & 3) == 3)) >> 1;
-    uvmy = (my + ((my & 3) == 3)) >> 1;
-    v->luma_mv[s->mb_x][0] = uvmx;
-    v->luma_mv[s->mb_x][1] = uvmy;
-
-    if (v->field_mode &&
-        v->cur_field_type != v->ref_field_type[dir]) {
-        my   = my   - 2 + 4 * v->cur_field_type;
-        uvmy = uvmy - 2 + 4 * v->cur_field_type;
-    }
-
-    // fastuvmc shall be ignored for interlaced frame picture
-    if (v->fastuvmc && (v->fcm != ILACE_FRAME)) {
-        uvmx = uvmx + ((uvmx < 0) ? (uvmx & 1) : -(uvmx & 1));
-        uvmy = uvmy + ((uvmy < 0) ? (uvmy & 1) : -(uvmy & 1));
-    }
-    if (!dir) {
-        if (v->field_mode && (v->cur_field_type != v->ref_field_type[dir]) && v->second_field) {
-            srcY = s->current_picture.f->data[0];
-            srcU = s->current_picture.f->data[1];
-            srcV = s->current_picture.f->data[2];
-            luty  = v->curr_luty;
-            lutuv = v->curr_lutuv;
-            use_ic = v->curr_use_ic;
-        } else {
-            srcY = s->last_picture.f->data[0];
-            srcU = s->last_picture.f->data[1];
-            srcV = s->last_picture.f->data[2];
-            luty  = v->last_luty;
-            lutuv = v->last_lutuv;
-            use_ic = v->last_use_ic;
-        }
-    } else {
-        srcY = s->next_picture.f->data[0];
-        srcU = s->next_picture.f->data[1];
-        srcV = s->next_picture.f->data[2];
-        luty  = v->next_luty;
-        lutuv = v->next_lutuv;
-        use_ic = v->next_use_ic;
-    }
-
-    if (!srcY || !srcU) {
-        av_log(v->s.avctx, AV_LOG_ERROR, "Referenced frame missing.\n");
-        return;
-    }
-
-    src_x   = s->mb_x * 16 + (mx   >> 2);
-    src_y   = s->mb_y * 16 + (my   >> 2);
-    uvsrc_x = s->mb_x *  8 + (uvmx >> 2);
-    uvsrc_y = s->mb_y *  8 + (uvmy >> 2);
-
-    if (v->profile != PROFILE_ADVANCED) {
-        src_x   = av_clip(  src_x, -16, s->mb_width  * 16);
-        src_y   = av_clip(  src_y, -16, s->mb_height * 16);
-        uvsrc_x = av_clip(uvsrc_x,  -8, s->mb_width  *  8);
-        uvsrc_y = av_clip(uvsrc_y,  -8, s->mb_height *  8);
-    } else {
-        src_x   = av_clip(  src_x, -17, s->avctx->coded_width);
-        src_y   = av_clip(  src_y, -18, s->avctx->coded_height + 1);
-        uvsrc_x = av_clip(uvsrc_x,  -8, s->avctx->coded_width  >> 1);
-        uvsrc_y = av_clip(uvsrc_y,  -8, s->avctx->coded_height >> 1);
-    }
-
-    srcY += src_y   * s->linesize   + src_x;
-    srcU += uvsrc_y * s->uvlinesize + uvsrc_x;
-    srcV += uvsrc_y * s->uvlinesize + uvsrc_x;
-
-    if (v->field_mode && v->ref_field_type[dir]) {
-        srcY += s->current_picture_ptr->f->linesize[0];
-        srcU += s->current_picture_ptr->f->linesize[1];
-        srcV += s->current_picture_ptr->f->linesize[2];
-    }
-
-    /* for grayscale we should not try to read from unknown area */
-    if (s->flags & CODEC_FLAG_GRAY) {
-        srcU = s->edge_emu_buffer + 18 * s->linesize;
-        srcV = s->edge_emu_buffer + 18 * s->linesize;
-    }
-
-    if (v->rangeredfrm || use_ic
-        || s->h_edge_pos < 22 || v_edge_pos < 22
-        || (unsigned)(src_x - s->mspel) > s->h_edge_pos - (mx&3) - 16 - s->mspel * 3
-        || (unsigned)(src_y - 1)        > v_edge_pos    - (my&3) - 16 - 3) {
-        uint8_t *uvbuf = s->edge_emu_buffer + 19 * s->linesize;
-
-        srcY -= s->mspel * (1 + s->linesize);
-        s->vdsp.emulated_edge_mc(s->edge_emu_buffer, srcY,
-                                 s->linesize, s->linesize,
-                                 17 + s->mspel * 2, 17 + s->mspel * 2,
-                                 src_x - s->mspel, src_y - s->mspel,
-                                 s->h_edge_pos, v_edge_pos);
-        srcY = s->edge_emu_buffer;
-        s->vdsp.emulated_edge_mc(uvbuf, srcU,
-                                 s->uvlinesize, s->uvlinesize,
-                                 8 + 1, 8 + 1,
-                                 uvsrc_x, uvsrc_y, s->h_edge_pos >> 1, v_edge_pos >> 1);
-        s->vdsp.emulated_edge_mc(uvbuf + 16, srcV,
-                                 s->uvlinesize, s->uvlinesize,
-                                 8 + 1, 8 + 1,
-                                 uvsrc_x, uvsrc_y, s->h_edge_pos >> 1, v_edge_pos >> 1);
-        srcU = uvbuf;
-        srcV = uvbuf + 16;
-        /* if we deal with range reduction we need to scale source blocks */
-        if (v->rangeredfrm) {
-            int i, j;
-            uint8_t *src, *src2;
-
-            src = srcY;
-            for (j = 0; j < 17 + s->mspel * 2; j++) {
-                for (i = 0; i < 17 + s->mspel * 2; i++)
-                    src[i] = ((src[i] - 128) >> 1) + 128;
-                src += s->linesize;
-            }
-            src  = srcU;
-            src2 = srcV;
-            for (j = 0; j < 9; j++) {
-                for (i = 0; i < 9; i++) {
-                    src[i]  = ((src[i]  - 128) >> 1) + 128;
-                    src2[i] = ((src2[i] - 128) >> 1) + 128;
-                }
-                src  += s->uvlinesize;
-                src2 += s->uvlinesize;
-            }
-        }
-        /* if we deal with intensity compensation we need to scale source blocks */
-        if (use_ic) {
-            int i, j;
-            uint8_t *src, *src2;
-
-            src = srcY;
-            for (j = 0; j < 17 + s->mspel * 2; j++) {
-                int f = v->field_mode ? v->ref_field_type[dir] : ((j + src_y - s->mspel) & 1) ;
-                for (i = 0; i < 17 + s->mspel * 2; i++)
-                    src[i] = luty[f][src[i]];
-                src += s->linesize;
-            }
-            src  = srcU;
-            src2 = srcV;
-            for (j = 0; j < 9; j++) {
-                int f = v->field_mode ? v->ref_field_type[dir] : ((j + uvsrc_y) & 1);
-                for (i = 0; i < 9; i++) {
-                    src[i]  = lutuv[f][src[i]];
-                    src2[i] = lutuv[f][src2[i]];
-                }
-                src  += s->uvlinesize;
-                src2 += s->uvlinesize;
-            }
-        }
-        srcY += s->mspel * (1 + s->linesize);
-    }
-
-    if (s->mspel) {
-        dxy = ((my & 3) << 2) | (mx & 3);
-        v->vc1dsp.put_vc1_mspel_pixels_tab[dxy](s->dest[0]    , srcY    , s->linesize, v->rnd);
-        v->vc1dsp.put_vc1_mspel_pixels_tab[dxy](s->dest[0] + 8, srcY + 8, s->linesize, v->rnd);
-        srcY += s->linesize * 8;
-        v->vc1dsp.put_vc1_mspel_pixels_tab[dxy](s->dest[0] + 8 * s->linesize    , srcY    , s->linesize, v->rnd);
-        v->vc1dsp.put_vc1_mspel_pixels_tab[dxy](s->dest[0] + 8 * s->linesize + 8, srcY + 8, s->linesize, v->rnd);
-    } else { // hpel mc - always used for luma
-        dxy = (my & 2) | ((mx & 2) >> 1);
-        if (!v->rnd)
-            s->hdsp.put_pixels_tab[0][dxy](s->dest[0], srcY, s->linesize, 16);
-        else
-            s->hdsp.put_no_rnd_pixels_tab[0][dxy](s->dest[0], srcY, s->linesize, 16);
-    }
-
-    if (s->flags & CODEC_FLAG_GRAY) return;
-    /* Chroma MC always uses qpel bilinear */
-    uvmx = (uvmx & 3) << 1;
-    uvmy = (uvmy & 3) << 1;
-    if (!v->rnd) {
-        h264chroma->put_h264_chroma_pixels_tab[0](s->dest[1], srcU, s->uvlinesize, 8, uvmx, uvmy);
-        h264chroma->put_h264_chroma_pixels_tab[0](s->dest[2], srcV, s->uvlinesize, 8, uvmx, uvmy);
-    } else {
-        v->vc1dsp.put_no_rnd_vc1_chroma_pixels_tab[0](s->dest[1], srcU, s->uvlinesize, 8, uvmx, uvmy);
-        v->vc1dsp.put_no_rnd_vc1_chroma_pixels_tab[0](s->dest[2], srcV, s->uvlinesize, 8, uvmx, uvmy);
-    }
-}
-
-static inline int median4(int a, int b, int c, int d)
-{
-    if (a < b) {
-        if (c < d) return (FFMIN(b, d) + FFMAX(a, c)) / 2;
-        else       return (FFMIN(b, c) + FFMAX(a, d)) / 2;
-    } else {
-        if (c < d) return (FFMIN(a, d) + FFMAX(b, c)) / 2;
-        else       return (FFMIN(a, c) + FFMAX(b, d)) / 2;
-    }
-}
-
-/** Do motion compensation for 4-MV macroblock - luminance block
- */
-static void vc1_mc_4mv_luma(VC1Context *v, int n, int dir, int avg)
-{
-    MpegEncContext *s = &v->s;
-    uint8_t *srcY;
-    int dxy, mx, my, src_x, src_y;
-    int off;
-    int fieldmv = (v->fcm == ILACE_FRAME) ? v->blk_mv_type[s->block_index[n]] : 0;
-    int v_edge_pos = s->v_edge_pos >> v->field_mode;
-    uint8_t (*luty)[256];
-    int use_ic;
-
-    if ((!v->field_mode ||
-         (v->ref_field_type[dir] == 1 && v->cur_field_type == 1)) &&
-        !v->s.last_picture.f->data[0])
-        return;
-
-    mx = s->mv[dir][n][0];
-    my = s->mv[dir][n][1];
-
-    if (!dir) {
-        if (v->field_mode && (v->cur_field_type != v->ref_field_type[dir]) && v->second_field) {
-            srcY = s->current_picture.f->data[0];
-            luty = v->curr_luty;
-            use_ic = v->curr_use_ic;
-        } else {
-            srcY = s->last_picture.f->data[0];
-            luty = v->last_luty;
-            use_ic = v->last_use_ic;
-        }
-    } else {
-        srcY = s->next_picture.f->data[0];
-        luty = v->next_luty;
-        use_ic = v->next_use_ic;
-    }
-
-    if (!srcY) {
-        av_log(v->s.avctx, AV_LOG_ERROR, "Referenced frame missing.\n");
-        return;
-    }
-
-    if (v->field_mode) {
-        if (v->cur_field_type != v->ref_field_type[dir])
-            my = my - 2 + 4 * v->cur_field_type;
-    }
-
-    if (s->pict_type == AV_PICTURE_TYPE_P && n == 3 && v->field_mode) {
-        int same_count = 0, opp_count = 0, k;
-        int chosen_mv[2][4][2], f;
-        int tx, ty;
-        for (k = 0; k < 4; k++) {
-            f = v->mv_f[0][s->block_index[k] + v->blocks_off];
-            chosen_mv[f][f ? opp_count : same_count][0] = s->mv[0][k][0];
-            chosen_mv[f][f ? opp_count : same_count][1] = s->mv[0][k][1];
-            opp_count  += f;
-            same_count += 1 - f;
-        }
-        f = opp_count > same_count;
-        switch (f ? opp_count : same_count) {
-        case 4:
-            tx = median4(chosen_mv[f][0][0], chosen_mv[f][1][0],
-                         chosen_mv[f][2][0], chosen_mv[f][3][0]);
-            ty = median4(chosen_mv[f][0][1], chosen_mv[f][1][1],
-                         chosen_mv[f][2][1], chosen_mv[f][3][1]);
-            break;
-        case 3:
-            tx = mid_pred(chosen_mv[f][0][0], chosen_mv[f][1][0], chosen_mv[f][2][0]);
-            ty = mid_pred(chosen_mv[f][0][1], chosen_mv[f][1][1], chosen_mv[f][2][1]);
-            break;
-        case 2:
-            tx = (chosen_mv[f][0][0] + chosen_mv[f][1][0]) / 2;
-            ty = (chosen_mv[f][0][1] + chosen_mv[f][1][1]) / 2;
-            break;
-        }
-        s->current_picture.motion_val[1][s->block_index[0] + v->blocks_off][0] = tx;
-        s->current_picture.motion_val[1][s->block_index[0] + v->blocks_off][1] = ty;
-        for (k = 0; k < 4; k++)
-            v->mv_f[1][s->block_index[k] + v->blocks_off] = f;
-    }
-
-    if (v->fcm == ILACE_FRAME) {  // not sure if needed for other types of picture
-        int qx, qy;
-        int width  = s->avctx->coded_width;
-        int height = s->avctx->coded_height >> 1;
-        if (s->pict_type == AV_PICTURE_TYPE_P) {
-            s->current_picture.motion_val[1][s->block_index[n] + v->blocks_off][0] = mx;
-            s->current_picture.motion_val[1][s->block_index[n] + v->blocks_off][1] = my;
-        }
-        qx = (s->mb_x * 16) + (mx >> 2);
-        qy = (s->mb_y *  8) + (my >> 3);
-
-        if (qx < -17)
-            mx -= 4 * (qx + 17);
-        else if (qx > width)
-            mx -= 4 * (qx - width);
-        if (qy < -18)
-            my -= 8 * (qy + 18);
-        else if (qy > height + 1)
-            my -= 8 * (qy - height - 1);
-    }
-
-    if ((v->fcm == ILACE_FRAME) && fieldmv)
-        off = ((n > 1) ? s->linesize : 0) + (n & 1) * 8;
-    else
-        off = s->linesize * 4 * (n & 2) + (n & 1) * 8;
-
-    src_x = s->mb_x * 16 + (n & 1) * 8 + (mx >> 2);
-    if (!fieldmv)
-        src_y = s->mb_y * 16 + (n & 2) * 4 + (my >> 2);
-    else
-        src_y = s->mb_y * 16 + ((n > 1) ? 1 : 0) + (my >> 2);
-
-    if (v->profile != PROFILE_ADVANCED) {
-        src_x = av_clip(src_x, -16, s->mb_width  * 16);
-        src_y = av_clip(src_y, -16, s->mb_height * 16);
-    } else {
-        src_x = av_clip(src_x, -17, s->avctx->coded_width);
-        if (v->fcm == ILACE_FRAME) {
-            if (src_y & 1)
-                src_y = av_clip(src_y, -17, s->avctx->coded_height + 1);
-            else
-                src_y = av_clip(src_y, -18, s->avctx->coded_height);
-        } else {
-            src_y = av_clip(src_y, -18, s->avctx->coded_height + 1);
-        }
-    }
-
-    srcY += src_y * s->linesize + src_x;
-    if (v->field_mode && v->ref_field_type[dir])
-        srcY += s->current_picture_ptr->f->linesize[0];
-
-    if (fieldmv && !(src_y & 1))
-        v_edge_pos--;
-    if (fieldmv && (src_y & 1) && src_y < 4)
-        src_y--;
-    if (v->rangeredfrm || use_ic
-        || s->h_edge_pos < 13 || v_edge_pos < 23
-        || (unsigned)(src_x - s->mspel) > s->h_edge_pos - (mx & 3) - 8 - s->mspel * 2
-        || (unsigned)(src_y - (s->mspel << fieldmv)) > v_edge_pos - (my & 3) - ((8 + s->mspel * 2) << fieldmv)) {
-        srcY -= s->mspel * (1 + (s->linesize << fieldmv));
-        /* check emulate edge stride and offset */
-        s->vdsp.emulated_edge_mc(s->edge_emu_buffer, srcY,
-                                 s->linesize, s->linesize,
-                                 9 + s->mspel * 2, (9 + s->mspel * 2) << fieldmv,
-                                 src_x - s->mspel, src_y - (s->mspel << fieldmv),
-                                 s->h_edge_pos, v_edge_pos);
-        srcY = s->edge_emu_buffer;
-        /* if we deal with range reduction we need to scale source blocks */
-        if (v->rangeredfrm) {
-            int i, j;
-            uint8_t *src;
-
-            src = srcY;
-            for (j = 0; j < 9 + s->mspel * 2; j++) {
-                for (i = 0; i < 9 + s->mspel * 2; i++)
-                    src[i] = ((src[i] - 128) >> 1) + 128;
-                src += s->linesize << fieldmv;
-            }
-        }
-        /* if we deal with intensity compensation we need to scale source blocks */
-        if (use_ic) {
-            int i, j;
-            uint8_t *src;
-
-            src = srcY;
-            for (j = 0; j < 9 + s->mspel * 2; j++) {
-                int f = v->field_mode ? v->ref_field_type[dir] : (((j<<fieldmv)+src_y - (s->mspel << fieldmv)) & 1);
-                for (i = 0; i < 9 + s->mspel * 2; i++)
-                    src[i] = luty[f][src[i]];
-                src += s->linesize << fieldmv;
-            }
-        }
-        srcY += s->mspel * (1 + (s->linesize << fieldmv));
-    }
-
-    if (s->mspel) {
-        dxy = ((my & 3) << 2) | (mx & 3);
-        if (avg)
-            v->vc1dsp.avg_vc1_mspel_pixels_tab[dxy](s->dest[0] + off, srcY, s->linesize << fieldmv, v->rnd);
-        else
-            v->vc1dsp.put_vc1_mspel_pixels_tab[dxy](s->dest[0] + off, srcY, s->linesize << fieldmv, v->rnd);
-    } else { // hpel mc - always used for luma
-        dxy = (my & 2) | ((mx & 2) >> 1);
-        if (!v->rnd)
-            s->hdsp.put_pixels_tab[1][dxy](s->dest[0] + off, srcY, s->linesize, 8);
-        else
-            s->hdsp.put_no_rnd_pixels_tab[1][dxy](s->dest[0] + off, srcY, s->linesize, 8);
-    }
-}
-
-static av_always_inline int get_chroma_mv(int *mvx, int *mvy, int *a, int flag, int *tx, int *ty)
-{
-    int idx, i;
-    static const int count[16] = { 0, 1, 1, 2, 1, 2, 2, 3, 1, 2, 2, 3, 2, 3, 3, 4};
-
-    idx =  ((a[3] != flag) << 3)
-         | ((a[2] != flag) << 2)
-         | ((a[1] != flag) << 1)
-         |  (a[0] != flag);
-    if (!idx) {
-        *tx = median4(mvx[0], mvx[1], mvx[2], mvx[3]);
-        *ty = median4(mvy[0], mvy[1], mvy[2], mvy[3]);
-        return 4;
-    } else if (count[idx] == 1) {
-        switch (idx) {
-        case 0x1:
-            *tx = mid_pred(mvx[1], mvx[2], mvx[3]);
-            *ty = mid_pred(mvy[1], mvy[2], mvy[3]);
-            return 3;
-        case 0x2:
-            *tx = mid_pred(mvx[0], mvx[2], mvx[3]);
-            *ty = mid_pred(mvy[0], mvy[2], mvy[3]);
-            return 3;
-        case 0x4:
-            *tx = mid_pred(mvx[0], mvx[1], mvx[3]);
-            *ty = mid_pred(mvy[0], mvy[1], mvy[3]);
-            return 3;
-        case 0x8:
-            *tx = mid_pred(mvx[0], mvx[1], mvx[2]);
-            *ty = mid_pred(mvy[0], mvy[1], mvy[2]);
-            return 3;
-        }
-    } else if (count[idx] == 2) {
-        int t1 = 0, t2 = 0;
-        for (i = 0; i < 3; i++)
-            if (!a[i]) {
-                t1 = i;
-                break;
-            }
-        for (i = t1 + 1; i < 4; i++)
-            if (!a[i]) {
-                t2 = i;
-                break;
-            }
-        *tx = (mvx[t1] + mvx[t2]) / 2;
-        *ty = (mvy[t1] + mvy[t2]) / 2;
-        return 2;
-    } else {
-        return 0;
-    }
-    return -1;
-}
-
-/** Do motion compensation for 4-MV macroblock - both chroma blocks
- */
-static void vc1_mc_4mv_chroma(VC1Context *v, int dir)
-{
-    MpegEncContext *s = &v->s;
-    H264ChromaContext *h264chroma = &v->h264chroma;
-    uint8_t *srcU, *srcV;
-    int uvmx, uvmy, uvsrc_x, uvsrc_y;
-    int k, tx = 0, ty = 0;
-    int mvx[4], mvy[4], intra[4], mv_f[4];
-    int valid_count;
-    int chroma_ref_type = v->cur_field_type;
-    int v_edge_pos = s->v_edge_pos >> v->field_mode;
-    uint8_t (*lutuv)[256];
-    int use_ic;
-
-    if (!v->field_mode && !v->s.last_picture.f->data[0])
-        return;
-    if (s->flags & CODEC_FLAG_GRAY)
-        return;
-
-    for (k = 0; k < 4; k++) {
-        mvx[k] = s->mv[dir][k][0];
-        mvy[k] = s->mv[dir][k][1];
-        intra[k] = v->mb_type[0][s->block_index[k]];
-        if (v->field_mode)
-            mv_f[k] = v->mv_f[dir][s->block_index[k] + v->blocks_off];
-    }
-
-    /* calculate chroma MV vector from four luma MVs */
-    if (!v->field_mode || (v->field_mode && !v->numref)) {
-        valid_count = get_chroma_mv(mvx, mvy, intra, 0, &tx, &ty);
-        chroma_ref_type = v->reffield;
-        if (!valid_count) {
-            s->current_picture.motion_val[1][s->block_index[0] + v->blocks_off][0] = 0;
-            s->current_picture.motion_val[1][s->block_index[0] + v->blocks_off][1] = 0;
-            v->luma_mv[s->mb_x][0] = v->luma_mv[s->mb_x][1] = 0;
-            return; //no need to do MC for intra blocks
-        }
-    } else {
-        int dominant = 0;
-        if (mv_f[0] + mv_f[1] + mv_f[2] + mv_f[3] > 2)
-            dominant = 1;
-        valid_count = get_chroma_mv(mvx, mvy, mv_f, dominant, &tx, &ty);
-        if (dominant)
-            chroma_ref_type = !v->cur_field_type;
-    }
-    if (v->field_mode && chroma_ref_type == 1 && v->cur_field_type == 1 && !v->s.last_picture.f->data[0])
-        return;
-    s->current_picture.motion_val[1][s->block_index[0] + v->blocks_off][0] = tx;
-    s->current_picture.motion_val[1][s->block_index[0] + v->blocks_off][1] = ty;
-    uvmx = (tx + ((tx & 3) == 3)) >> 1;
-    uvmy = (ty + ((ty & 3) == 3)) >> 1;
-
-    v->luma_mv[s->mb_x][0] = uvmx;
-    v->luma_mv[s->mb_x][1] = uvmy;
-
-    if (v->fastuvmc) {
-        uvmx = uvmx + ((uvmx < 0) ? (uvmx & 1) : -(uvmx & 1));
-        uvmy = uvmy + ((uvmy < 0) ? (uvmy & 1) : -(uvmy & 1));
-    }
-    // Field conversion bias
-    if (v->cur_field_type != chroma_ref_type)
-        uvmy += 2 - 4 * chroma_ref_type;
-
-    uvsrc_x = s->mb_x * 8 + (uvmx >> 2);
-    uvsrc_y = s->mb_y * 8 + (uvmy >> 2);
-
-    if (v->profile != PROFILE_ADVANCED) {
-        uvsrc_x = av_clip(uvsrc_x, -8, s->mb_width  * 8);
-        uvsrc_y = av_clip(uvsrc_y, -8, s->mb_height * 8);
-    } else {
-        uvsrc_x = av_clip(uvsrc_x, -8, s->avctx->coded_width  >> 1);
-        uvsrc_y = av_clip(uvsrc_y, -8, s->avctx->coded_height >> 1);
-    }
-
-    if (!dir) {
-        if (v->field_mode && (v->cur_field_type != chroma_ref_type) && v->second_field) {
-            srcU = s->current_picture.f->data[1];
-            srcV = s->current_picture.f->data[2];
-            lutuv = v->curr_lutuv;
-            use_ic = v->curr_use_ic;
-        } else {
-            srcU = s->last_picture.f->data[1];
-            srcV = s->last_picture.f->data[2];
-            lutuv = v->last_lutuv;
-            use_ic = v->last_use_ic;
-        }
-    } else {
-        srcU = s->next_picture.f->data[1];
-        srcV = s->next_picture.f->data[2];
-        lutuv = v->next_lutuv;
-        use_ic = v->next_use_ic;
-    }
-
-    if (!srcU) {
-        av_log(v->s.avctx, AV_LOG_ERROR, "Referenced frame missing.\n");
-        return;
-    }
-
-    srcU += uvsrc_y * s->uvlinesize + uvsrc_x;
-    srcV += uvsrc_y * s->uvlinesize + uvsrc_x;
-
-    if (v->field_mode) {
-        if (chroma_ref_type) {
-            srcU += s->current_picture_ptr->f->linesize[1];
-            srcV += s->current_picture_ptr->f->linesize[2];
-        }
-    }
-
-    if (v->rangeredfrm || use_ic
-        || s->h_edge_pos < 18 || v_edge_pos < 18
-        || (unsigned)uvsrc_x > (s->h_edge_pos >> 1) - 9
-        || (unsigned)uvsrc_y > (v_edge_pos    >> 1) - 9) {
-        s->vdsp.emulated_edge_mc(s->edge_emu_buffer, srcU,
-                                 s->uvlinesize, s->uvlinesize,
-                                 8 + 1, 8 + 1, uvsrc_x, uvsrc_y,
-                                 s->h_edge_pos >> 1, v_edge_pos >> 1);
-        s->vdsp.emulated_edge_mc(s->edge_emu_buffer + 16, srcV,
-                                 s->uvlinesize, s->uvlinesize,
-                                 8 + 1, 8 + 1, uvsrc_x, uvsrc_y,
-                                 s->h_edge_pos >> 1, v_edge_pos >> 1);
-        srcU = s->edge_emu_buffer;
-        srcV = s->edge_emu_buffer + 16;
-
-        /* if we deal with range reduction we need to scale source blocks */
-        if (v->rangeredfrm) {
-            int i, j;
-            uint8_t *src, *src2;
-
-            src  = srcU;
-            src2 = srcV;
-            for (j = 0; j < 9; j++) {
-                for (i = 0; i < 9; i++) {
-                    src[i]  = ((src[i]  - 128) >> 1) + 128;
-                    src2[i] = ((src2[i] - 128) >> 1) + 128;
-                }
-                src  += s->uvlinesize;
-                src2 += s->uvlinesize;
-            }
-        }
-        /* if we deal with intensity compensation we need to scale source blocks */
-        if (use_ic) {
-            int i, j;
-            uint8_t *src, *src2;
-
-            src  = srcU;
-            src2 = srcV;
-            for (j = 0; j < 9; j++) {
-                int f = v->field_mode ? chroma_ref_type : ((j + uvsrc_y) & 1);
-                for (i = 0; i < 9; i++) {
-                    src[i]  = lutuv[f][src[i]];
-                    src2[i] = lutuv[f][src2[i]];
-                }
-                src  += s->uvlinesize;
-                src2 += s->uvlinesize;
-            }
-        }
-    }
-
-    /* Chroma MC always uses qpel bilinear */
-    uvmx = (uvmx & 3) << 1;
-    uvmy = (uvmy & 3) << 1;
-    if (!v->rnd) {
-        h264chroma->put_h264_chroma_pixels_tab[0](s->dest[1], srcU, s->uvlinesize, 8, uvmx, uvmy);
-        h264chroma->put_h264_chroma_pixels_tab[0](s->dest[2], srcV, s->uvlinesize, 8, uvmx, uvmy);
-    } else {
-        v->vc1dsp.put_no_rnd_vc1_chroma_pixels_tab[0](s->dest[1], srcU, s->uvlinesize, 8, uvmx, uvmy);
-        v->vc1dsp.put_no_rnd_vc1_chroma_pixels_tab[0](s->dest[2], srcV, s->uvlinesize, 8, uvmx, uvmy);
-    }
-}
-
-/** Do motion compensation for 4-MV interlaced frame chroma macroblock (both U and V)
- */
-static void vc1_mc_4mv_chroma4(VC1Context *v, int dir, int dir2, int avg)
-{
-    MpegEncContext *s = &v->s;
-    H264ChromaContext *h264chroma = &v->h264chroma;
-    uint8_t *srcU, *srcV;
-    int uvsrc_x, uvsrc_y;
-    int uvmx_field[4], uvmy_field[4];
-    int i, off, tx, ty;
-    int fieldmv = v->blk_mv_type[s->block_index[0]];
-    static const int s_rndtblfield[16] = { 0, 0, 1, 2, 4, 4, 5, 6, 2, 2, 3, 8, 6, 6, 7, 12 };
-    int v_dist = fieldmv ? 1 : 4; // vertical offset for lower sub-blocks
-    int v_edge_pos = s->v_edge_pos >> 1;
-    int use_ic;
-    uint8_t (*lutuv)[256];
-
-    if (s->flags & CODEC_FLAG_GRAY)
-        return;
-
-    for (i = 0; i < 4; i++) {
-        int d = i < 2 ? dir: dir2;
-        tx = s->mv[d][i][0];
-        uvmx_field[i] = (tx + ((tx & 3) == 3)) >> 1;
-        ty = s->mv[d][i][1];
-        if (fieldmv)
-            uvmy_field[i] = (ty >> 4) * 8 + s_rndtblfield[ty & 0xF];
-        else
-            uvmy_field[i] = (ty + ((ty & 3) == 3)) >> 1;
-    }
-
-    for (i = 0; i < 4; i++) {
-        off = (i & 1) * 4 + ((i & 2) ? v_dist * s->uvlinesize : 0);
-        uvsrc_x = s->mb_x * 8 +  (i & 1) * 4           + (uvmx_field[i] >> 2);
-        uvsrc_y = s->mb_y * 8 + ((i & 2) ? v_dist : 0) + (uvmy_field[i] >> 2);
-        // FIXME: implement proper pull-back (see vc1cropmv.c, vc1CROPMV_ChromaPullBack())
-        uvsrc_x = av_clip(uvsrc_x, -8, s->avctx->coded_width  >> 1);
-        uvsrc_y = av_clip(uvsrc_y, -8, s->avctx->coded_height >> 1);
-        if (i < 2 ? dir : dir2) {
-            srcU = s->next_picture.f->data[1] + uvsrc_y * s->uvlinesize + uvsrc_x;
-            srcV = s->next_picture.f->data[2] + uvsrc_y * s->uvlinesize + uvsrc_x;
-            lutuv  = v->next_lutuv;
-            use_ic = v->next_use_ic;
-        } else {
-            srcU = s->last_picture.f->data[1] + uvsrc_y * s->uvlinesize + uvsrc_x;
-            srcV = s->last_picture.f->data[2] + uvsrc_y * s->uvlinesize + uvsrc_x;
-            lutuv  = v->last_lutuv;
-            use_ic = v->last_use_ic;
-        }
-        uvmx_field[i] = (uvmx_field[i] & 3) << 1;
-        uvmy_field[i] = (uvmy_field[i] & 3) << 1;
-
-        if (fieldmv && !(uvsrc_y & 1))
-            v_edge_pos--;
-        if (fieldmv && (uvsrc_y & 1) && uvsrc_y < 2)
-            uvsrc_y--;
-        if (use_ic
-            || s->h_edge_pos < 10 || v_edge_pos < (5 << fieldmv)
-            || (unsigned)uvsrc_x > (s->h_edge_pos >> 1) - 5
-            || (unsigned)uvsrc_y > v_edge_pos - (5 << fieldmv)) {
-            s->vdsp.emulated_edge_mc(s->edge_emu_buffer, srcU,
-                                     s->uvlinesize, s->uvlinesize,
-                                     5, (5 << fieldmv), uvsrc_x, uvsrc_y,
-                                     s->h_edge_pos >> 1, v_edge_pos);
-            s->vdsp.emulated_edge_mc(s->edge_emu_buffer + 16, srcV,
-                                     s->uvlinesize, s->uvlinesize,
-                                     5, (5 << fieldmv), uvsrc_x, uvsrc_y,
-                                     s->h_edge_pos >> 1, v_edge_pos);
-            srcU = s->edge_emu_buffer;
-            srcV = s->edge_emu_buffer + 16;
-
-            /* if we deal with intensity compensation we need to scale source blocks */
-            if (use_ic) {
-                int i, j;
-                uint8_t *src, *src2;
-
-                src  = srcU;
-                src2 = srcV;
-                for (j = 0; j < 5; j++) {
-                    int f = (uvsrc_y + (j << fieldmv)) & 1;
-                    for (i = 0; i < 5; i++) {
-                        src[i]  = lutuv[f][src[i]];
-                        src2[i] = lutuv[f][src2[i]];
-                    }
-                    src  += s->uvlinesize << fieldmv;
-                    src2 += s->uvlinesize << fieldmv;
-                }
-            }
-        }
-        if (avg) {
-            if (!v->rnd) {
-                h264chroma->avg_h264_chroma_pixels_tab[1](s->dest[1] + off, srcU, s->uvlinesize << fieldmv, 4, uvmx_field[i], uvmy_field[i]);
-                h264chroma->avg_h264_chroma_pixels_tab[1](s->dest[2] + off, srcV, s->uvlinesize << fieldmv, 4, uvmx_field[i], uvmy_field[i]);
-            } else {
-                v->vc1dsp.avg_no_rnd_vc1_chroma_pixels_tab[1](s->dest[1] + off, srcU, s->uvlinesize << fieldmv, 4, uvmx_field[i], uvmy_field[i]);
-                v->vc1dsp.avg_no_rnd_vc1_chroma_pixels_tab[1](s->dest[2] + off, srcV, s->uvlinesize << fieldmv, 4, uvmx_field[i], uvmy_field[i]);
-            }
-        } else {
-            if (!v->rnd) {
-                h264chroma->put_h264_chroma_pixels_tab[1](s->dest[1] + off, srcU, s->uvlinesize << fieldmv, 4, uvmx_field[i], uvmy_field[i]);
-                h264chroma->put_h264_chroma_pixels_tab[1](s->dest[2] + off, srcV, s->uvlinesize << fieldmv, 4, uvmx_field[i], uvmy_field[i]);
-            } else {
-                v->vc1dsp.put_no_rnd_vc1_chroma_pixels_tab[1](s->dest[1] + off, srcU, s->uvlinesize << fieldmv, 4, uvmx_field[i], uvmy_field[i]);
-                v->vc1dsp.put_no_rnd_vc1_chroma_pixels_tab[1](s->dest[2] + off, srcV, s->uvlinesize << fieldmv, 4, uvmx_field[i], uvmy_field[i]);
-            }
-        }
-    }
-}
-
-/***********************************************************************/
-/**
- * @name VC-1 Block-level functions
- * @see 7.1.4, p91 and 8.1.1.7, p(1)04
- * @{
- */
-
-/**
- * @def GET_MQUANT
- * @brief Get macroblock-level quantizer scale
- */
-#define GET_MQUANT()                                           \
-    if (v->dquantfrm) {                                        \
-        int edges = 0;                                         \
-        if (v->dqprofile == DQPROFILE_ALL_MBS) {               \
-            if (v->dqbilevel) {                                \
-                mquant = (get_bits1(gb)) ? v->altpq : v->pq;   \
-            } else {                                           \
-                mqdiff = get_bits(gb, 3);                      \
-                if (mqdiff != 7)                               \
-                    mquant = v->pq + mqdiff;                   \
-                else                                           \
-                    mquant = get_bits(gb, 5);                  \
-            }                                                  \
-        }                                                      \
-        if (v->dqprofile == DQPROFILE_SINGLE_EDGE)             \
-            edges = 1 << v->dqsbedge;                          \
-        else if (v->dqprofile == DQPROFILE_DOUBLE_EDGES)       \
-            edges = (3 << v->dqsbedge) % 15;                   \
-        else if (v->dqprofile == DQPROFILE_FOUR_EDGES)         \
-            edges = 15;                                        \
-        if ((edges&1) && !s->mb_x)                             \
-            mquant = v->altpq;                                 \
-        if ((edges&2) && s->first_slice_line)                  \
-            mquant = v->altpq;                                 \
-        if ((edges&4) && s->mb_x == (s->mb_width - 1))         \
-            mquant = v->altpq;                                 \
-        if ((edges&8) && s->mb_y == (s->mb_height - 1))        \
-            mquant = v->altpq;                                 \
-        if (!mquant || mquant > 31) {                          \
-            av_log(v->s.avctx, AV_LOG_ERROR,                   \
-                   "Overriding invalid mquant %d\n", mquant);  \
-            mquant = 1;                                        \
-        }                                                      \
-    }
-
-/**
- * @def GET_MVDATA(_dmv_x, _dmv_y)
- * @brief Get MV differentials
- * @see MVDATA decoding from 8.3.5.2, p(1)20
- * @param _dmv_x Horizontal differential for decoded MV
- * @param _dmv_y Vertical differential for decoded MV
- */
-#define GET_MVDATA(_dmv_x, _dmv_y)                                      \
-    index = 1 + get_vlc2(gb, ff_vc1_mv_diff_vlc[s->mv_table_index].table, \
-                         VC1_MV_DIFF_VLC_BITS, 2);                      \
-    if (index > 36) {                                                   \
-        mb_has_coeffs = 1;                                              \
-        index -= 37;                                                    \
-    } else                                                              \
-        mb_has_coeffs = 0;                                              \
-    s->mb_intra = 0;                                                    \
-    if (!index) {                                                       \
-        _dmv_x = _dmv_y = 0;                                            \
-    } else if (index == 35) {                                           \
-        _dmv_x = get_bits(gb, v->k_x - 1 + s->quarter_sample);          \
-        _dmv_y = get_bits(gb, v->k_y - 1 + s->quarter_sample);          \
-    } else if (index == 36) {                                           \
-        _dmv_x = 0;                                                     \
-        _dmv_y = 0;                                                     \
-        s->mb_intra = 1;                                                \
-    } else {                                                            \
-        index1 = index % 6;                                             \
-        if (!s->quarter_sample && index1 == 5) val = 1;                 \
-        else                                   val = 0;                 \
-        if (size_table[index1] - val > 0)                               \
-            val = get_bits(gb, size_table[index1] - val);               \
-        else                                   val = 0;                 \
-        sign = 0 - (val&1);                                             \
-        _dmv_x = (sign ^ ((val>>1) + offset_table[index1])) - sign;     \
-                                                                        \
-        index1 = index / 6;                                             \
-        if (!s->quarter_sample && index1 == 5) val = 1;                 \
-        else                                   val = 0;                 \
-        if (size_table[index1] - val > 0)                               \
-            val = get_bits(gb, size_table[index1] - val);               \
-        else                                   val = 0;                 \
-        sign = 0 - (val & 1);                                           \
-        _dmv_y = (sign ^ ((val >> 1) + offset_table[index1])) - sign;   \
-    }
-
-static av_always_inline void get_mvdata_interlaced(VC1Context *v, int *dmv_x,
-                                                   int *dmv_y, int *pred_flag)
-{
-    int index, index1;
-    int extend_x = 0, extend_y = 0;
-    GetBitContext *gb = &v->s.gb;
-    int bits, esc;
-    int val, sign;
-    const int* offs_tab;
-
-    if (v->numref) {
-        bits = VC1_2REF_MVDATA_VLC_BITS;
-        esc  = 125;
-    } else {
-        bits = VC1_1REF_MVDATA_VLC_BITS;
-        esc  = 71;
-    }
-    switch (v->dmvrange) {
-    case 1:
-        extend_x = 1;
-        break;
-    case 2:
-        extend_y = 1;
-        break;
-    case 3:
-        extend_x = extend_y = 1;
-        break;
-    }
-    index = get_vlc2(gb, v->imv_vlc->table, bits, 3);
-    if (index == esc) {
-        *dmv_x = get_bits(gb, v->k_x);
-        *dmv_y = get_bits(gb, v->k_y);
-        if (v->numref) {
-            if (pred_flag) {
-                *pred_flag = *dmv_y & 1;
-                *dmv_y     = (*dmv_y + *pred_flag) >> 1;
-            } else {
-                *dmv_y     = (*dmv_y + (*dmv_y & 1)) >> 1;
-            }
-        }
-    }
-    else {
-        if (extend_x)
-            offs_tab = offset_table2;
-        else
-            offs_tab = offset_table1;
-        index1 = (index + 1) % 9;
-        if (index1 != 0) {
-            val    = get_bits(gb, index1 + extend_x);
-            sign   = 0 -(val & 1);
-            *dmv_x = (sign ^ ((val >> 1) + offs_tab[index1])) - sign;
-        } else
-            *dmv_x = 0;
-        if (extend_y)
-            offs_tab = offset_table2;
-        else
-            offs_tab = offset_table1;
-        index1 = (index + 1) / 9;
-        if (index1 > v->numref) {
-            val    = get_bits(gb, (index1 + (extend_y << v->numref)) >> v->numref);
-            sign   = 0 - (val & 1);
-            *dmv_y = (sign ^ ((val >> 1) + offs_tab[index1 >> v->numref])) - sign;
-        } else
-            *dmv_y = 0;
-        if (v->numref && pred_flag)
-            *pred_flag = index1 & 1;
-    }
-}
-
-static av_always_inline int scaleforsame_x(VC1Context *v, int n /* MV */, int dir)
-{
-    int scaledvalue, refdist;
-    int scalesame1, scalesame2;
-    int scalezone1_x, zone1offset_x;
-    int table_index = dir ^ v->second_field;
-
-    if (v->s.pict_type != AV_PICTURE_TYPE_B)
-        refdist = v->refdist;
-    else
-        refdist = dir ? v->brfd : v->frfd;
-    if (refdist > 3)
-        refdist = 3;
-    scalesame1    = ff_vc1_field_mvpred_scales[table_index][1][refdist];
-    scalesame2    = ff_vc1_field_mvpred_scales[table_index][2][refdist];
-    scalezone1_x  = ff_vc1_field_mvpred_scales[table_index][3][refdist];
-    zone1offset_x = ff_vc1_field_mvpred_scales[table_index][5][refdist];
-
-    if (FFABS(n) > 255)
-        scaledvalue = n;
-    else {
-        if (FFABS(n) < scalezone1_x)
-            scaledvalue = (n * scalesame1) >> 8;
-        else {
-            if (n < 0)
-                scaledvalue = ((n * scalesame2) >> 8) - zone1offset_x;
-            else
-                scaledvalue = ((n * scalesame2) >> 8) + zone1offset_x;
-        }
-    }
-    return av_clip(scaledvalue, -v->range_x, v->range_x - 1);
-}
-
-static av_always_inline int scaleforsame_y(VC1Context *v, int i, int n /* MV */, int dir)
-{
-    int scaledvalue, refdist;
-    int scalesame1, scalesame2;
-    int scalezone1_y, zone1offset_y;
-    int table_index = dir ^ v->second_field;
-
-    if (v->s.pict_type != AV_PICTURE_TYPE_B)
-        refdist = v->refdist;
-    else
-        refdist = dir ? v->brfd : v->frfd;
-    if (refdist > 3)
-        refdist = 3;
-    scalesame1    = ff_vc1_field_mvpred_scales[table_index][1][refdist];
-    scalesame2    = ff_vc1_field_mvpred_scales[table_index][2][refdist];
-    scalezone1_y  = ff_vc1_field_mvpred_scales[table_index][4][refdist];
-    zone1offset_y = ff_vc1_field_mvpred_scales[table_index][6][refdist];
-
-    if (FFABS(n) > 63)
-        scaledvalue = n;
-    else {
-        if (FFABS(n) < scalezone1_y)
-            scaledvalue = (n * scalesame1) >> 8;
-        else {
-            if (n < 0)
-                scaledvalue = ((n * scalesame2) >> 8) - zone1offset_y;
-            else
-                scaledvalue = ((n * scalesame2) >> 8) + zone1offset_y;
-        }
-    }
-
-    if (v->cur_field_type && !v->ref_field_type[dir])
-        return av_clip(scaledvalue, -v->range_y / 2 + 1, v->range_y / 2);
-    else
-        return av_clip(scaledvalue, -v->range_y / 2, v->range_y / 2 - 1);
-}
-
-static av_always_inline int scaleforopp_x(VC1Context *v, int n /* MV */)
-{
-    int scalezone1_x, zone1offset_x;
-    int scaleopp1, scaleopp2, brfd;
-    int scaledvalue;
-
-    brfd = FFMIN(v->brfd, 3);
-    scalezone1_x  = ff_vc1_b_field_mvpred_scales[3][brfd];
-    zone1offset_x = ff_vc1_b_field_mvpred_scales[5][brfd];
-    scaleopp1     = ff_vc1_b_field_mvpred_scales[1][brfd];
-    scaleopp2     = ff_vc1_b_field_mvpred_scales[2][brfd];
-
-    if (FFABS(n) > 255)
-        scaledvalue = n;
-    else {
-        if (FFABS(n) < scalezone1_x)
-            scaledvalue = (n * scaleopp1) >> 8;
-        else {
-            if (n < 0)
-                scaledvalue = ((n * scaleopp2) >> 8) - zone1offset_x;
-            else
-                scaledvalue = ((n * scaleopp2) >> 8) + zone1offset_x;
-        }
-    }
-    return av_clip(scaledvalue, -v->range_x, v->range_x - 1);
-}
-
-static av_always_inline int scaleforopp_y(VC1Context *v, int n /* MV */, int dir)
-{
-    int scalezone1_y, zone1offset_y;
-    int scaleopp1, scaleopp2, brfd;
-    int scaledvalue;
-
-    brfd = FFMIN(v->brfd, 3);
-    scalezone1_y  = ff_vc1_b_field_mvpred_scales[4][brfd];
-    zone1offset_y = ff_vc1_b_field_mvpred_scales[6][brfd];
-    scaleopp1     = ff_vc1_b_field_mvpred_scales[1][brfd];
-    scaleopp2     = ff_vc1_b_field_mvpred_scales[2][brfd];
-
-    if (FFABS(n) > 63)
-        scaledvalue = n;
-    else {
-        if (FFABS(n) < scalezone1_y)
-            scaledvalue = (n * scaleopp1) >> 8;
-        else {
-            if (n < 0)
-                scaledvalue = ((n * scaleopp2) >> 8) - zone1offset_y;
-            else
-                scaledvalue = ((n * scaleopp2) >> 8) + zone1offset_y;
-        }
-    }
-    if (v->cur_field_type && !v->ref_field_type[dir]) {
-        return av_clip(scaledvalue, -v->range_y / 2 + 1, v->range_y / 2);
-    } else {
-        return av_clip(scaledvalue, -v->range_y / 2, v->range_y / 2 - 1);
-    }
-}
-
-static av_always_inline int scaleforsame(VC1Context *v, int i, int n /* MV */,
-                                         int dim, int dir)
-{
-    int brfd, scalesame;
-    int hpel = 1 - v->s.quarter_sample;
-
-    n >>= hpel;
-    if (v->s.pict_type != AV_PICTURE_TYPE_B || v->second_field || !dir) {
-        if (dim)
-            n = scaleforsame_y(v, i, n, dir) << hpel;
-        else
-            n = scaleforsame_x(v, n, dir) << hpel;
-        return n;
-    }
-    brfd      = FFMIN(v->brfd, 3);
-    scalesame = ff_vc1_b_field_mvpred_scales[0][brfd];
-
-    n = (n * scalesame >> 8) << hpel;
-    return n;
-}
-
-static av_always_inline int scaleforopp(VC1Context *v, int n /* MV */,
-                                        int dim, int dir)
-{
-    int refdist, scaleopp;
-    int hpel = 1 - v->s.quarter_sample;
-
-    n >>= hpel;
-    if (v->s.pict_type == AV_PICTURE_TYPE_B && !v->second_field && dir == 1) {
-        if (dim)
-            n = scaleforopp_y(v, n, dir) << hpel;
-        else
-            n = scaleforopp_x(v, n) << hpel;
-        return n;
-    }
-    if (v->s.pict_type != AV_PICTURE_TYPE_B)
-        refdist = FFMIN(v->refdist, 3);
-    else
-        refdist = dir ? v->brfd : v->frfd;
-    scaleopp = ff_vc1_field_mvpred_scales[dir ^ v->second_field][0][refdist];
-
-    n = (n * scaleopp >> 8) << hpel;
-    return n;
-}
-
-/** Predict and set motion vector
- */
-static inline void vc1_pred_mv(VC1Context *v, int n, int dmv_x, int dmv_y,
-                               int mv1, int r_x, int r_y, uint8_t* is_intra,
-                               int pred_flag, int dir)
-{
-    MpegEncContext *s = &v->s;
-    int xy, wrap, off = 0;
-    int16_t *A, *B, *C;
-    int px, py;
-    int sum;
-    int mixedmv_pic, num_samefield = 0, num_oppfield = 0;
-    int opposite, a_f, b_f, c_f;
-    int16_t field_predA[2];
-    int16_t field_predB[2];
-    int16_t field_predC[2];
-    int a_valid, b_valid, c_valid;
-    int hybridmv_thresh, y_bias = 0;
-
-    if (v->mv_mode == MV_PMODE_MIXED_MV ||
-        ((v->mv_mode == MV_PMODE_INTENSITY_COMP) && (v->mv_mode2 == MV_PMODE_MIXED_MV)))
-        mixedmv_pic = 1;
-    else
-        mixedmv_pic = 0;
-    /* scale MV difference to be quad-pel */
-    dmv_x <<= 1 - s->quarter_sample;
-    dmv_y <<= 1 - s->quarter_sample;
-
-    wrap = s->b8_stride;
-    xy   = s->block_index[n];
-
-    if (s->mb_intra) {
-        s->mv[0][n][0] = s->current_picture.motion_val[0][xy + v->blocks_off][0] = 0;
-        s->mv[0][n][1] = s->current_picture.motion_val[0][xy + v->blocks_off][1] = 0;
-        s->current_picture.motion_val[1][xy + v->blocks_off][0] = 0;
-        s->current_picture.motion_val[1][xy + v->blocks_off][1] = 0;
-        if (mv1) { /* duplicate motion data for 1-MV block */
-            s->current_picture.motion_val[0][xy + 1 + v->blocks_off][0]        = 0;
-            s->current_picture.motion_val[0][xy + 1 + v->blocks_off][1]        = 0;
-            s->current_picture.motion_val[0][xy + wrap + v->blocks_off][0]     = 0;
-            s->current_picture.motion_val[0][xy + wrap + v->blocks_off][1]     = 0;
-            s->current_picture.motion_val[0][xy + wrap + 1 + v->blocks_off][0] = 0;
-            s->current_picture.motion_val[0][xy + wrap + 1 + v->blocks_off][1] = 0;
-            v->luma_mv[s->mb_x][0] = v->luma_mv[s->mb_x][1] = 0;
-            s->current_picture.motion_val[1][xy + 1 + v->blocks_off][0]        = 0;
-            s->current_picture.motion_val[1][xy + 1 + v->blocks_off][1]        = 0;
-            s->current_picture.motion_val[1][xy + wrap][0]                     = 0;
-            s->current_picture.motion_val[1][xy + wrap + v->blocks_off][1]     = 0;
-            s->current_picture.motion_val[1][xy + wrap + 1 + v->blocks_off][0] = 0;
-            s->current_picture.motion_val[1][xy + wrap + 1 + v->blocks_off][1] = 0;
-        }
-        return;
-    }
-
-    C = s->current_picture.motion_val[dir][xy -    1 + v->blocks_off];
-    A = s->current_picture.motion_val[dir][xy - wrap + v->blocks_off];
-    if (mv1) {
-        if (v->field_mode && mixedmv_pic)
-            off = (s->mb_x == (s->mb_width - 1)) ? -2 : 2;
-        else
-            off = (s->mb_x == (s->mb_width - 1)) ? -1 : 2;
-    } else {
-        //in 4-MV mode different blocks have different B predictor position
-        switch (n) {
-        case 0:
-            off = (s->mb_x > 0) ? -1 : 1;
-            break;
-        case 1:
-            off = (s->mb_x == (s->mb_width - 1)) ? -1 : 1;
-            break;
-        case 2:
-            off = 1;
-            break;
-        case 3:
-            off = -1;
-        }
-    }
-    B = s->current_picture.motion_val[dir][xy - wrap + off + v->blocks_off];
-
-    a_valid = !s->first_slice_line || (n == 2 || n == 3);
-    b_valid = a_valid && (s->mb_width > 1);
-    c_valid = s->mb_x || (n == 1 || n == 3);
-    if (v->field_mode) {
-        a_valid = a_valid && !is_intra[xy - wrap];
-        b_valid = b_valid && !is_intra[xy - wrap + off];
-        c_valid = c_valid && !is_intra[xy - 1];
-    }
-
-    if (a_valid) {
-        a_f = v->mv_f[dir][xy - wrap + v->blocks_off];
-        num_oppfield  += a_f;
-        num_samefield += 1 - a_f;
-        field_predA[0] = A[0];
-        field_predA[1] = A[1];
-    } else {
-        field_predA[0] = field_predA[1] = 0;
-        a_f = 0;
-    }
-    if (b_valid) {
-        b_f = v->mv_f[dir][xy - wrap + off + v->blocks_off];
-        num_oppfield  += b_f;
-        num_samefield += 1 - b_f;
-        field_predB[0] = B[0];
-        field_predB[1] = B[1];
-    } else {
-        field_predB[0] = field_predB[1] = 0;
-        b_f = 0;
-    }
-    if (c_valid) {
-        c_f = v->mv_f[dir][xy - 1 + v->blocks_off];
-        num_oppfield  += c_f;
-        num_samefield += 1 - c_f;
-        field_predC[0] = C[0];
-        field_predC[1] = C[1];
-    } else {
-        field_predC[0] = field_predC[1] = 0;
-        c_f = 0;
-    }
-
-    if (v->field_mode) {
-        if (!v->numref)
-            // REFFIELD determines if the last field or the second-last field is
-            // to be used as reference
-            opposite = 1 - v->reffield;
-        else {
-            if (num_samefield <= num_oppfield)
-                opposite = 1 - pred_flag;
-            else
-                opposite = pred_flag;
-        }
-    } else
-        opposite = 0;
-    if (opposite) {
-        if (a_valid && !a_f) {
-            field_predA[0] = scaleforopp(v, field_predA[0], 0, dir);
-            field_predA[1] = scaleforopp(v, field_predA[1], 1, dir);
-        }
-        if (b_valid && !b_f) {
-            field_predB[0] = scaleforopp(v, field_predB[0], 0, dir);
-            field_predB[1] = scaleforopp(v, field_predB[1], 1, dir);
-        }
-        if (c_valid && !c_f) {
-            field_predC[0] = scaleforopp(v, field_predC[0], 0, dir);
-            field_predC[1] = scaleforopp(v, field_predC[1], 1, dir);
-        }
-        v->mv_f[dir][xy + v->blocks_off] = 1;
-        v->ref_field_type[dir] = !v->cur_field_type;
-    } else {
-        if (a_valid && a_f) {
-            field_predA[0] = scaleforsame(v, n, field_predA[0], 0, dir);
-            field_predA[1] = scaleforsame(v, n, field_predA[1], 1, dir);
-        }
-        if (b_valid && b_f) {
-            field_predB[0] = scaleforsame(v, n, field_predB[0], 0, dir);
-            field_predB[1] = scaleforsame(v, n, field_predB[1], 1, dir);
-        }
-        if (c_valid && c_f) {
-            field_predC[0] = scaleforsame(v, n, field_predC[0], 0, dir);
-            field_predC[1] = scaleforsame(v, n, field_predC[1], 1, dir);
-        }
-        v->mv_f[dir][xy + v->blocks_off] = 0;
-        v->ref_field_type[dir] = v->cur_field_type;
-    }
-
-    if (a_valid) {
-        px = field_predA[0];
-        py = field_predA[1];
-    } else if (c_valid) {
-        px = field_predC[0];
-        py = field_predC[1];
-    } else if (b_valid) {
-        px = field_predB[0];
-        py = field_predB[1];
-    } else {
-        px = 0;
-        py = 0;
-    }
-
-    if (num_samefield + num_oppfield > 1) {
-        px = mid_pred(field_predA[0], field_predB[0], field_predC[0]);
-        py = mid_pred(field_predA[1], field_predB[1], field_predC[1]);
-    }
-
-    /* Pullback MV as specified in 8.3.5.3.4 */
-    if (!v->field_mode) {
-        int qx, qy, X, Y;
-        qx = (s->mb_x << 6) + ((n == 1 || n == 3) ? 32 : 0);
-        qy = (s->mb_y << 6) + ((n == 2 || n == 3) ? 32 : 0);
-        X  = (s->mb_width  << 6) - 4;
-        Y  = (s->mb_height << 6) - 4;
-        if (mv1) {
-            if (qx + px < -60) px = -60 - qx;
-            if (qy + py < -60) py = -60 - qy;
-        } else {
-            if (qx + px < -28) px = -28 - qx;
-            if (qy + py < -28) py = -28 - qy;
-        }
-        if (qx + px > X) px = X - qx;
-        if (qy + py > Y) py = Y - qy;
-    }
-
-    if (!v->field_mode || s->pict_type != AV_PICTURE_TYPE_B) {
-        /* Calculate hybrid prediction as specified in 8.3.5.3.5 (also 10.3.5.4.3.5) */
-        hybridmv_thresh = 32;
-        if (a_valid && c_valid) {
-            if (is_intra[xy - wrap])
-                sum = FFABS(px) + FFABS(py);
-            else
-                sum = FFABS(px - field_predA[0]) + FFABS(py - field_predA[1]);
-            if (sum > hybridmv_thresh) {
-                if (get_bits1(&s->gb)) {     // read HYBRIDPRED bit
-                    px = field_predA[0];
-                    py = field_predA[1];
-                } else {
-                    px = field_predC[0];
-                    py = field_predC[1];
-                }
-            } else {
-                if (is_intra[xy - 1])
-                    sum = FFABS(px) + FFABS(py);
-                else
-                    sum = FFABS(px - field_predC[0]) + FFABS(py - field_predC[1]);
-                if (sum > hybridmv_thresh) {
-                    if (get_bits1(&s->gb)) {
-                        px = field_predA[0];
-                        py = field_predA[1];
-                    } else {
-                        px = field_predC[0];
-                        py = field_predC[1];
-                    }
-                }
-            }
-        }
-    }
-
-    if (v->field_mode && v->numref)
-        r_y >>= 1;
-    if (v->field_mode && v->cur_field_type && v->ref_field_type[dir] == 0)
-        y_bias = 1;
-    /* store MV using signed modulus of MV range defined in 4.11 */
-    s->mv[dir][n][0] = s->current_picture.motion_val[dir][xy + v->blocks_off][0] = ((px + dmv_x + r_x) & ((r_x << 1) - 1)) - r_x;
-    s->mv[dir][n][1] = s->current_picture.motion_val[dir][xy + v->blocks_off][1] = ((py + dmv_y + r_y - y_bias) & ((r_y << 1) - 1)) - r_y + y_bias;
-    if (mv1) { /* duplicate motion data for 1-MV block */
-        s->current_picture.motion_val[dir][xy +    1 +     v->blocks_off][0] = s->current_picture.motion_val[dir][xy + v->blocks_off][0];
-        s->current_picture.motion_val[dir][xy +    1 +     v->blocks_off][1] = s->current_picture.motion_val[dir][xy + v->blocks_off][1];
-        s->current_picture.motion_val[dir][xy + wrap +     v->blocks_off][0] = s->current_picture.motion_val[dir][xy + v->blocks_off][0];
-        s->current_picture.motion_val[dir][xy + wrap +     v->blocks_off][1] = s->current_picture.motion_val[dir][xy + v->blocks_off][1];
-        s->current_picture.motion_val[dir][xy + wrap + 1 + v->blocks_off][0] = s->current_picture.motion_val[dir][xy + v->blocks_off][0];
-        s->current_picture.motion_val[dir][xy + wrap + 1 + v->blocks_off][1] = s->current_picture.motion_val[dir][xy + v->blocks_off][1];
-        v->mv_f[dir][xy +    1 + v->blocks_off] = v->mv_f[dir][xy +            v->blocks_off];
-        v->mv_f[dir][xy + wrap + v->blocks_off] = v->mv_f[dir][xy + wrap + 1 + v->blocks_off] = v->mv_f[dir][xy + v->blocks_off];
-    }
-}
-
-/** Predict and set motion vector for interlaced frame picture MBs
- */
-static inline void vc1_pred_mv_intfr(VC1Context *v, int n, int dmv_x, int dmv_y,
-                                     int mvn, int r_x, int r_y, uint8_t* is_intra, int dir)
-{
-    MpegEncContext *s = &v->s;
-    int xy, wrap, off = 0;
-    int A[2], B[2], C[2];
-    int px, py;
-    int a_valid = 0, b_valid = 0, c_valid = 0;
-    int field_a, field_b, field_c; // 0: same, 1: opposit
-    int total_valid, num_samefield, num_oppfield;
-    int pos_c, pos_b, n_adj;
-
-    wrap = s->b8_stride;
-    xy = s->block_index[n];
-
-    if (s->mb_intra) {
-        s->mv[0][n][0] = s->current_picture.motion_val[0][xy][0] = 0;
-        s->mv[0][n][1] = s->current_picture.motion_val[0][xy][1] = 0;
-        s->current_picture.motion_val[1][xy][0] = 0;
-        s->current_picture.motion_val[1][xy][1] = 0;
-        if (mvn == 1) { /* duplicate motion data for 1-MV block */
-            s->current_picture.motion_val[0][xy + 1][0]        = 0;
-            s->current_picture.motion_val[0][xy + 1][1]        = 0;
-            s->current_picture.motion_val[0][xy + wrap][0]     = 0;
-            s->current_picture.motion_val[0][xy + wrap][1]     = 0;
-            s->current_picture.motion_val[0][xy + wrap + 1][0] = 0;
-            s->current_picture.motion_val[0][xy + wrap + 1][1] = 0;
-            v->luma_mv[s->mb_x][0] = v->luma_mv[s->mb_x][1] = 0;
-            s->current_picture.motion_val[1][xy + 1][0]        = 0;
-            s->current_picture.motion_val[1][xy + 1][1]        = 0;
-            s->current_picture.motion_val[1][xy + wrap][0]     = 0;
-            s->current_picture.motion_val[1][xy + wrap][1]     = 0;
-            s->current_picture.motion_val[1][xy + wrap + 1][0] = 0;
-            s->current_picture.motion_val[1][xy + wrap + 1][1] = 0;
-        }
-        return;
-    }
-
-    off = ((n == 0) || (n == 1)) ? 1 : -1;
-    /* predict A */
-    if (s->mb_x || (n == 1) || (n == 3)) {
-        if ((v->blk_mv_type[xy]) // current block (MB) has a field MV
-            || (!v->blk_mv_type[xy] && !v->blk_mv_type[xy - 1])) { // or both have frame MV
-            A[0] = s->current_picture.motion_val[dir][xy - 1][0];
-            A[1] = s->current_picture.motion_val[dir][xy - 1][1];
-            a_valid = 1;
-        } else { // current block has frame mv and cand. has field MV (so average)
-            A[0] = (s->current_picture.motion_val[dir][xy - 1][0]
-                    + s->current_picture.motion_val[dir][xy - 1 + off * wrap][0] + 1) >> 1;
-            A[1] = (s->current_picture.motion_val[dir][xy - 1][1]
-                    + s->current_picture.motion_val[dir][xy - 1 + off * wrap][1] + 1) >> 1;
-            a_valid = 1;
-        }
-        if (!(n & 1) && v->is_intra[s->mb_x - 1]) {
-            a_valid = 0;
-            A[0] = A[1] = 0;
-        }
-    } else
-        A[0] = A[1] = 0;
-    /* Predict B and C */
-    B[0] = B[1] = C[0] = C[1] = 0;
-    if (n == 0 || n == 1 || v->blk_mv_type[xy]) {
-        if (!s->first_slice_line) {
-            if (!v->is_intra[s->mb_x - s->mb_stride]) {
-                b_valid = 1;
-                n_adj   = n | 2;
-                pos_b   = s->block_index[n_adj] - 2 * wrap;
-                if (v->blk_mv_type[pos_b] && v->blk_mv_type[xy]) {
-                    n_adj = (n & 2) | (n & 1);
-                }
-                B[0] = s->current_picture.motion_val[dir][s->block_index[n_adj] - 2 * wrap][0];
-                B[1] = s->current_picture.motion_val[dir][s->block_index[n_adj] - 2 * wrap][1];
-                if (v->blk_mv_type[pos_b] && !v->blk_mv_type[xy]) {
-                    B[0] = (B[0] + s->current_picture.motion_val[dir][s->block_index[n_adj ^ 2] - 2 * wrap][0] + 1) >> 1;
-                    B[1] = (B[1] + s->current_picture.motion_val[dir][s->block_index[n_adj ^ 2] - 2 * wrap][1] + 1) >> 1;
-                }
-            }
-            if (s->mb_width > 1) {
-                if (!v->is_intra[s->mb_x - s->mb_stride + 1]) {
-                    c_valid = 1;
-                    n_adj   = 2;
-                    pos_c   = s->block_index[2] - 2 * wrap + 2;
-                    if (v->blk_mv_type[pos_c] && v->blk_mv_type[xy]) {
-                        n_adj = n & 2;
-                    }
-                    C[0] = s->current_picture.motion_val[dir][s->block_index[n_adj] - 2 * wrap + 2][0];
-                    C[1] = s->current_picture.motion_val[dir][s->block_index[n_adj] - 2 * wrap + 2][1];
-                    if (v->blk_mv_type[pos_c] && !v->blk_mv_type[xy]) {
-                        C[0] = (1 + C[0] + (s->current_picture.motion_val[dir][s->block_index[n_adj ^ 2] - 2 * wrap + 2][0])) >> 1;
-                        C[1] = (1 + C[1] + (s->current_picture.motion_val[dir][s->block_index[n_adj ^ 2] - 2 * wrap + 2][1])) >> 1;
-                    }
-                    if (s->mb_x == s->mb_width - 1) {
-                        if (!v->is_intra[s->mb_x - s->mb_stride - 1]) {
-                            c_valid = 1;
-                            n_adj   = 3;
-                            pos_c   = s->block_index[3] - 2 * wrap - 2;
-                            if (v->blk_mv_type[pos_c] && v->blk_mv_type[xy]) {
-                                n_adj = n | 1;
-                            }
-                            C[0] = s->current_picture.motion_val[dir][s->block_index[n_adj] - 2 * wrap - 2][0];
-                            C[1] = s->current_picture.motion_val[dir][s->block_index[n_adj] - 2 * wrap - 2][1];
-                            if (v->blk_mv_type[pos_c] && !v->blk_mv_type[xy]) {
-                                C[0] = (1 + C[0] + s->current_picture.motion_val[dir][s->block_index[1] - 2 * wrap - 2][0]) >> 1;
-                                C[1] = (1 + C[1] + s->current_picture.motion_val[dir][s->block_index[1] - 2 * wrap - 2][1]) >> 1;
-                            }
-                        } else
-                            c_valid = 0;
-                    }
-                }
-            }
-        }
-    } else {
-        pos_b   = s->block_index[1];
-        b_valid = 1;
-        B[0]    = s->current_picture.motion_val[dir][pos_b][0];
-        B[1]    = s->current_picture.motion_val[dir][pos_b][1];
-        pos_c   = s->block_index[0];
-        c_valid = 1;
-        C[0]    = s->current_picture.motion_val[dir][pos_c][0];
-        C[1]    = s->current_picture.motion_val[dir][pos_c][1];
-    }
-
-    total_valid = a_valid + b_valid + c_valid;
-    // check if predictor A is out of bounds
-    if (!s->mb_x && !(n == 1 || n == 3)) {
-        A[0] = A[1] = 0;
-    }
-    // check if predictor B is out of bounds
-    if ((s->first_slice_line && v->blk_mv_type[xy]) || (s->first_slice_line && !(n & 2))) {
-        B[0] = B[1] = C[0] = C[1] = 0;
-    }
-    if (!v->blk_mv_type[xy]) {
-        if (s->mb_width == 1) {
-            px = B[0];
-            py = B[1];
-        } else {
-            if (total_valid >= 2) {
-                px = mid_pred(A[0], B[0], C[0]);
-                py = mid_pred(A[1], B[1], C[1]);
-            } else if (total_valid) {
-                if (a_valid) { px = A[0]; py = A[1]; }
-                if (b_valid) { px = B[0]; py = B[1]; }
-                if (c_valid) { px = C[0]; py = C[1]; }
-            } else
-                px = py = 0;
-        }
-    } else {
-        if (a_valid)
-            field_a = (A[1] & 4) ? 1 : 0;
-        else
-            field_a = 0;
-        if (b_valid)
-            field_b = (B[1] & 4) ? 1 : 0;
-        else
-            field_b = 0;
-        if (c_valid)
-            field_c = (C[1] & 4) ? 1 : 0;
-        else
-            field_c = 0;
-
-        num_oppfield  = field_a + field_b + field_c;
-        num_samefield = total_valid - num_oppfield;
-        if (total_valid == 3) {
-            if ((num_samefield == 3) || (num_oppfield == 3)) {
-                px = mid_pred(A[0], B[0], C[0]);
-                py = mid_pred(A[1], B[1], C[1]);
-            } else if (num_samefield >= num_oppfield) {
-                /* take one MV from same field set depending on priority
-                the check for B may not be necessary */
-                px = !field_a ? A[0] : B[0];
-                py = !field_a ? A[1] : B[1];
-            } else {
-                px =  field_a ? A[0] : B[0];
-                py =  field_a ? A[1] : B[1];
-            }
-        } else if (total_valid == 2) {
-            if (num_samefield >= num_oppfield) {
-                if (!field_a && a_valid) {
-                    px = A[0];
-                    py = A[1];
-                } else if (!field_b && b_valid) {
-                    px = B[0];
-                    py = B[1];
-                } else if (c_valid) {
-                    px = C[0];
-                    py = C[1];
-                } else px = py = 0;
-            } else {
-                if (field_a && a_valid) {
-                    px = A[0];
-                    py = A[1];
-                } else if (field_b && b_valid) {
-                    px = B[0];
-                    py = B[1];
-                } else if (c_valid) {
-                    px = C[0];
-                    py = C[1];
-                } else
-                    px = py = 0;
-            }
-        } else if (total_valid == 1) {
-            px = (a_valid) ? A[0] : ((b_valid) ? B[0] : C[0]);
-            py = (a_valid) ? A[1] : ((b_valid) ? B[1] : C[1]);
-        } else
-            px = py = 0;
-    }
-
-    /* store MV using signed modulus of MV range defined in 4.11 */
-    s->mv[dir][n][0] = s->current_picture.motion_val[dir][xy][0] = ((px + dmv_x + r_x) & ((r_x << 1) - 1)) - r_x;
-    s->mv[dir][n][1] = s->current_picture.motion_val[dir][xy][1] = ((py + dmv_y + r_y) & ((r_y << 1) - 1)) - r_y;
-    if (mvn == 1) { /* duplicate motion data for 1-MV block */
-        s->current_picture.motion_val[dir][xy +    1    ][0] = s->current_picture.motion_val[dir][xy][0];
-        s->current_picture.motion_val[dir][xy +    1    ][1] = s->current_picture.motion_val[dir][xy][1];
-        s->current_picture.motion_val[dir][xy + wrap    ][0] = s->current_picture.motion_val[dir][xy][0];
-        s->current_picture.motion_val[dir][xy + wrap    ][1] = s->current_picture.motion_val[dir][xy][1];
-        s->current_picture.motion_val[dir][xy + wrap + 1][0] = s->current_picture.motion_val[dir][xy][0];
-        s->current_picture.motion_val[dir][xy + wrap + 1][1] = s->current_picture.motion_val[dir][xy][1];
-    } else if (mvn == 2) { /* duplicate motion data for 2-Field MV block */
-        s->current_picture.motion_val[dir][xy + 1][0] = s->current_picture.motion_val[dir][xy][0];
-        s->current_picture.motion_val[dir][xy + 1][1] = s->current_picture.motion_val[dir][xy][1];
-        s->mv[dir][n + 1][0] = s->mv[dir][n][0];
-        s->mv[dir][n + 1][1] = s->mv[dir][n][1];
-    }
-}
-
-/** Motion compensation for direct or interpolated blocks in B-frames
- */
-static void vc1_interp_mc(VC1Context *v)
-{
-    MpegEncContext *s = &v->s;
-    H264ChromaContext *h264chroma = &v->h264chroma;
-    uint8_t *srcY, *srcU, *srcV;
-    int dxy, mx, my, uvmx, uvmy, src_x, src_y, uvsrc_x, uvsrc_y;
-    int off, off_uv;
-    int v_edge_pos = s->v_edge_pos >> v->field_mode;
-    int use_ic = v->next_use_ic;
-
-    if (!v->field_mode && !v->s.next_picture.f->data[0])
-        return;
-
-    mx   = s->mv[1][0][0];
-    my   = s->mv[1][0][1];
-    uvmx = (mx + ((mx & 3) == 3)) >> 1;
-    uvmy = (my + ((my & 3) == 3)) >> 1;
-    if (v->field_mode) {
-        if (v->cur_field_type != v->ref_field_type[1])
-            my   = my   - 2 + 4 * v->cur_field_type;
-            uvmy = uvmy - 2 + 4 * v->cur_field_type;
-    }
-    if (v->fastuvmc) {
-        uvmx = uvmx + ((uvmx < 0) ? -(uvmx & 1) : (uvmx & 1));
-        uvmy = uvmy + ((uvmy < 0) ? -(uvmy & 1) : (uvmy & 1));
-    }
-    srcY = s->next_picture.f->data[0];
-    srcU = s->next_picture.f->data[1];
-    srcV = s->next_picture.f->data[2];
-
-    src_x   = s->mb_x * 16 + (mx   >> 2);
-    src_y   = s->mb_y * 16 + (my   >> 2);
-    uvsrc_x = s->mb_x *  8 + (uvmx >> 2);
-    uvsrc_y = s->mb_y *  8 + (uvmy >> 2);
-
-    if (v->profile != PROFILE_ADVANCED) {
-        src_x   = av_clip(  src_x, -16, s->mb_width  * 16);
-        src_y   = av_clip(  src_y, -16, s->mb_height * 16);
-        uvsrc_x = av_clip(uvsrc_x,  -8, s->mb_width  *  8);
-        uvsrc_y = av_clip(uvsrc_y,  -8, s->mb_height *  8);
-    } else {
-        src_x   = av_clip(  src_x, -17, s->avctx->coded_width);
-        src_y   = av_clip(  src_y, -18, s->avctx->coded_height + 1);
-        uvsrc_x = av_clip(uvsrc_x,  -8, s->avctx->coded_width  >> 1);
-        uvsrc_y = av_clip(uvsrc_y,  -8, s->avctx->coded_height >> 1);
-    }
-
-    srcY += src_y   * s->linesize   + src_x;
-    srcU += uvsrc_y * s->uvlinesize + uvsrc_x;
-    srcV += uvsrc_y * s->uvlinesize + uvsrc_x;
-
-    if (v->field_mode && v->ref_field_type[1]) {
-        srcY += s->current_picture_ptr->f->linesize[0];
-        srcU += s->current_picture_ptr->f->linesize[1];
-        srcV += s->current_picture_ptr->f->linesize[2];
-    }
-
-    /* for grayscale we should not try to read from unknown area */
-    if (s->flags & CODEC_FLAG_GRAY) {
-        srcU = s->edge_emu_buffer + 18 * s->linesize;
-        srcV = s->edge_emu_buffer + 18 * s->linesize;
-    }
-
-    if (v->rangeredfrm || s->h_edge_pos < 22 || v_edge_pos < 22 || use_ic
-        || (unsigned)(src_x - 1) > s->h_edge_pos - (mx & 3) - 16 - 3
-        || (unsigned)(src_y - 1) > v_edge_pos    - (my & 3) - 16 - 3) {
-        uint8_t *uvbuf = s->edge_emu_buffer + 19 * s->linesize;
-
-        srcY -= s->mspel * (1 + s->linesize);
-        s->vdsp.emulated_edge_mc(s->edge_emu_buffer, srcY,
-                                 s->linesize, s->linesize,
-                                 17 + s->mspel * 2, 17 + s->mspel * 2,
-                                 src_x - s->mspel, src_y - s->mspel,
-                                 s->h_edge_pos, v_edge_pos);
-        srcY = s->edge_emu_buffer;
-        s->vdsp.emulated_edge_mc(uvbuf, srcU,
-                                 s->uvlinesize, s->uvlinesize,
-                                 8 + 1, 8 + 1,
-                                 uvsrc_x, uvsrc_y, s->h_edge_pos >> 1, v_edge_pos >> 1);
-        s->vdsp.emulated_edge_mc(uvbuf + 16, srcV,
-                                 s->uvlinesize, s->uvlinesize,
-                                 8 + 1, 8 + 1,
-                                 uvsrc_x, uvsrc_y, s->h_edge_pos >> 1, v_edge_pos >> 1);
-        srcU = uvbuf;
-        srcV = uvbuf + 16;
-        /* if we deal with range reduction we need to scale source blocks */
-        if (v->rangeredfrm) {
-            int i, j;
-            uint8_t *src, *src2;
-
-            src = srcY;
-            for (j = 0; j < 17 + s->mspel * 2; j++) {
-                for (i = 0; i < 17 + s->mspel * 2; i++)
-                    src[i] = ((src[i] - 128) >> 1) + 128;
-                src += s->linesize;
-            }
-            src = srcU;
-            src2 = srcV;
-            for (j = 0; j < 9; j++) {
-                for (i = 0; i < 9; i++) {
-                    src[i]  = ((src[i]  - 128) >> 1) + 128;
-                    src2[i] = ((src2[i] - 128) >> 1) + 128;
-                }
-                src  += s->uvlinesize;
-                src2 += s->uvlinesize;
-            }
-        }
-
-        if (use_ic) {
-            uint8_t (*luty )[256] = v->next_luty;
-            uint8_t (*lutuv)[256] = v->next_lutuv;
-            int i, j;
-            uint8_t *src, *src2;
-
-            src = srcY;
-            for (j = 0; j < 17 + s->mspel * 2; j++) {
-                int f = v->field_mode ? v->ref_field_type[1] : ((j+src_y - s->mspel) & 1);
-                for (i = 0; i < 17 + s->mspel * 2; i++)
-                    src[i] = luty[f][src[i]];
-                src += s->linesize;
-            }
-            src  = srcU;
-            src2 = srcV;
-            for (j = 0; j < 9; j++) {
-                int f = v->field_mode ? v->ref_field_type[1] : ((j+uvsrc_y) & 1);
-                for (i = 0; i < 9; i++) {
-                    src[i]  = lutuv[f][src[i]];
-                    src2[i] = lutuv[f][src2[i]];
-                }
-                src  += s->uvlinesize;
-                src2 += s->uvlinesize;
-            }
-        }
-        srcY += s->mspel * (1 + s->linesize);
-    }
-
-    off    = 0;
-    off_uv = 0;
-
-    if (s->mspel) {
-        dxy = ((my & 3) << 2) | (mx & 3);
-        v->vc1dsp.avg_vc1_mspel_pixels_tab[dxy](s->dest[0] + off    , srcY    , s->linesize, v->rnd);
-        v->vc1dsp.avg_vc1_mspel_pixels_tab[dxy](s->dest[0] + off + 8, srcY + 8, s->linesize, v->rnd);
-        srcY += s->linesize * 8;
-        v->vc1dsp.avg_vc1_mspel_pixels_tab[dxy](s->dest[0] + off + 8 * s->linesize    , srcY    , s->linesize, v->rnd);
-        v->vc1dsp.avg_vc1_mspel_pixels_tab[dxy](s->dest[0] + off + 8 * s->linesize + 8, srcY + 8, s->linesize, v->rnd);
-    } else { // hpel mc
-        dxy = (my & 2) | ((mx & 2) >> 1);
-
-        if (!v->rnd)
-            s->hdsp.avg_pixels_tab[0][dxy](s->dest[0] + off, srcY, s->linesize, 16);
-        else
-            s->hdsp.avg_no_rnd_pixels_tab[dxy](s->dest[0] + off, srcY, s->linesize, 16);
-    }
-
-    if (s->flags & CODEC_FLAG_GRAY) return;
-    /* Chroma MC always uses qpel blilinear */
-    uvmx = (uvmx & 3) << 1;
-    uvmy = (uvmy & 3) << 1;
-    if (!v->rnd) {
-        h264chroma->avg_h264_chroma_pixels_tab[0](s->dest[1] + off_uv, srcU, s->uvlinesize, 8, uvmx, uvmy);
-        h264chroma->avg_h264_chroma_pixels_tab[0](s->dest[2] + off_uv, srcV, s->uvlinesize, 8, uvmx, uvmy);
-    } else {
-        v->vc1dsp.avg_no_rnd_vc1_chroma_pixels_tab[0](s->dest[1] + off_uv, srcU, s->uvlinesize, 8, uvmx, uvmy);
-        v->vc1dsp.avg_no_rnd_vc1_chroma_pixels_tab[0](s->dest[2] + off_uv, srcV, s->uvlinesize, 8, uvmx, uvmy);
-    }
-}
-
-static av_always_inline int scale_mv(int value, int bfrac, int inv, int qs)
-{
-    int n = bfrac;
-
-#if B_FRACTION_DEN==256
-    if (inv)
-        n -= 256;
-    if (!qs)
-        return 2 * ((value * n + 255) >> 9);
-    return (value * n + 128) >> 8;
-#else
-    if (inv)
-        n -= B_FRACTION_DEN;
-    if (!qs)
-        return 2 * ((value * n + B_FRACTION_DEN - 1) / (2 * B_FRACTION_DEN));
-    return (value * n + B_FRACTION_DEN/2) / B_FRACTION_DEN;
-#endif
-}
-
-/** Reconstruct motion vector for B-frame and do motion compensation
- */
-static inline void vc1_b_mc(VC1Context *v, int dmv_x[2], int dmv_y[2],
-                            int direct, int mode)
-{
-    if (direct) {
-        vc1_mc_1mv(v, 0);
-        vc1_interp_mc(v);
-        return;
-    }
-    if (mode == BMV_TYPE_INTERPOLATED) {
-        vc1_mc_1mv(v, 0);
-        vc1_interp_mc(v);
-        return;
-    }
-
-    vc1_mc_1mv(v, (mode == BMV_TYPE_BACKWARD));
-}
-
-static inline void vc1_pred_b_mv(VC1Context *v, int dmv_x[2], int dmv_y[2],
-                                 int direct, int mvtype)
-{
-    MpegEncContext *s = &v->s;
-    int xy, wrap, off = 0;
-    int16_t *A, *B, *C;
-    int px, py;
-    int sum;
-    int r_x, r_y;
-    const uint8_t *is_intra = v->mb_type[0];
-
-    r_x = v->range_x;
-    r_y = v->range_y;
-    /* scale MV difference to be quad-pel */
-    dmv_x[0] <<= 1 - s->quarter_sample;
-    dmv_y[0] <<= 1 - s->quarter_sample;
-    dmv_x[1] <<= 1 - s->quarter_sample;
-    dmv_y[1] <<= 1 - s->quarter_sample;
-
-    wrap = s->b8_stride;
-    xy = s->block_index[0];
-
-    if (s->mb_intra) {
-        s->current_picture.motion_val[0][xy + v->blocks_off][0] =
-        s->current_picture.motion_val[0][xy + v->blocks_off][1] =
-        s->current_picture.motion_val[1][xy + v->blocks_off][0] =
-        s->current_picture.motion_val[1][xy + v->blocks_off][1] = 0;
-        return;
-    }
-    if (!v->field_mode) {
-        s->mv[0][0][0] = scale_mv(s->next_picture.motion_val[1][xy][0], v->bfraction, 0, s->quarter_sample);
-        s->mv[0][0][1] = scale_mv(s->next_picture.motion_val[1][xy][1], v->bfraction, 0, s->quarter_sample);
-        s->mv[1][0][0] = scale_mv(s->next_picture.motion_val[1][xy][0], v->bfraction, 1, s->quarter_sample);
-        s->mv[1][0][1] = scale_mv(s->next_picture.motion_val[1][xy][1], v->bfraction, 1, s->quarter_sample);
-
-        /* Pullback predicted motion vectors as specified in 8.4.5.4 */
-        s->mv[0][0][0] = av_clip(s->mv[0][0][0], -60 - (s->mb_x << 6), (s->mb_width  << 6) - 4 - (s->mb_x << 6));
-        s->mv[0][0][1] = av_clip(s->mv[0][0][1], -60 - (s->mb_y << 6), (s->mb_height << 6) - 4 - (s->mb_y << 6));
-        s->mv[1][0][0] = av_clip(s->mv[1][0][0], -60 - (s->mb_x << 6), (s->mb_width  << 6) - 4 - (s->mb_x << 6));
-        s->mv[1][0][1] = av_clip(s->mv[1][0][1], -60 - (s->mb_y << 6), (s->mb_height << 6) - 4 - (s->mb_y << 6));
-    }
-    if (direct) {
-        s->current_picture.motion_val[0][xy + v->blocks_off][0] = s->mv[0][0][0];
-        s->current_picture.motion_val[0][xy + v->blocks_off][1] = s->mv[0][0][1];
-        s->current_picture.motion_val[1][xy + v->blocks_off][0] = s->mv[1][0][0];
-        s->current_picture.motion_val[1][xy + v->blocks_off][1] = s->mv[1][0][1];
-        return;
-    }
-
-    if ((mvtype == BMV_TYPE_FORWARD) || (mvtype == BMV_TYPE_INTERPOLATED)) {
-        C   = s->current_picture.motion_val[0][xy - 2];
-        A   = s->current_picture.motion_val[0][xy - wrap * 2];
-        off = (s->mb_x == (s->mb_width - 1)) ? -2 : 2;
-        B   = s->current_picture.motion_val[0][xy - wrap * 2 + off];
-
-        if (!s->mb_x) C[0] = C[1] = 0;
-        if (!s->first_slice_line) { // predictor A is not out of bounds
-            if (s->mb_width == 1) {
-                px = A[0];
-                py = A[1];
-            } else {
-                px = mid_pred(A[0], B[0], C[0]);
-                py = mid_pred(A[1], B[1], C[1]);
-            }
-        } else if (s->mb_x) { // predictor C is not out of bounds
-            px = C[0];
-            py = C[1];
-        } else {
-            px = py = 0;
-        }
-        /* Pullback MV as specified in 8.3.5.3.4 */
-        {
-            int qx, qy, X, Y;
-            if (v->profile < PROFILE_ADVANCED) {
-                qx = (s->mb_x << 5);
-                qy = (s->mb_y << 5);
-                X  = (s->mb_width  << 5) - 4;
-                Y  = (s->mb_height << 5) - 4;
-                if (qx + px < -28) px = -28 - qx;
-                if (qy + py < -28) py = -28 - qy;
-                if (qx + px > X) px = X - qx;
-                if (qy + py > Y) py = Y - qy;
-            } else {
-                qx = (s->mb_x << 6);
-                qy = (s->mb_y << 6);
-                X  = (s->mb_width  << 6) - 4;
-                Y  = (s->mb_height << 6) - 4;
-                if (qx + px < -60) px = -60 - qx;
-                if (qy + py < -60) py = -60 - qy;
-                if (qx + px > X) px = X - qx;
-                if (qy + py > Y) py = Y - qy;
-            }
-        }
-        /* Calculate hybrid prediction as specified in 8.3.5.3.5 */
-        if (0 && !s->first_slice_line && s->mb_x) {
-            if (is_intra[xy - wrap])
-                sum = FFABS(px) + FFABS(py);
-            else
-                sum = FFABS(px - A[0]) + FFABS(py - A[1]);
-            if (sum > 32) {
-                if (get_bits1(&s->gb)) {
-                    px = A[0];
-                    py = A[1];
-                } else {
-                    px = C[0];
-                    py = C[1];
-                }
-            } else {
-                if (is_intra[xy - 2])
-                    sum = FFABS(px) + FFABS(py);
-                else
-                    sum = FFABS(px - C[0]) + FFABS(py - C[1]);
-                if (sum > 32) {
-                    if (get_bits1(&s->gb)) {
-                        px = A[0];
-                        py = A[1];
-                    } else {
-                        px = C[0];
-                        py = C[1];
-                    }
-                }
-            }
-        }
-        /* store MV using signed modulus of MV range defined in 4.11 */
-        s->mv[0][0][0] = ((px + dmv_x[0] + r_x) & ((r_x << 1) - 1)) - r_x;
-        s->mv[0][0][1] = ((py + dmv_y[0] + r_y) & ((r_y << 1) - 1)) - r_y;
-    }
-    if ((mvtype == BMV_TYPE_BACKWARD) || (mvtype == BMV_TYPE_INTERPOLATED)) {
-        C   = s->current_picture.motion_val[1][xy - 2];
-        A   = s->current_picture.motion_val[1][xy - wrap * 2];
-        off = (s->mb_x == (s->mb_width - 1)) ? -2 : 2;
-        B   = s->current_picture.motion_val[1][xy - wrap * 2 + off];
-
-        if (!s->mb_x)
-            C[0] = C[1] = 0;
-        if (!s->first_slice_line) { // predictor A is not out of bounds
-            if (s->mb_width == 1) {
-                px = A[0];
-                py = A[1];
-            } else {
-                px = mid_pred(A[0], B[0], C[0]);
-                py = mid_pred(A[1], B[1], C[1]);
-            }
-        } else if (s->mb_x) { // predictor C is not out of bounds
-            px = C[0];
-            py = C[1];
-        } else {
-            px = py = 0;
-        }
-        /* Pullback MV as specified in 8.3.5.3.4 */
-        {
-            int qx, qy, X, Y;
-            if (v->profile < PROFILE_ADVANCED) {
-                qx = (s->mb_x << 5);
-                qy = (s->mb_y << 5);
-                X  = (s->mb_width  << 5) - 4;
-                Y  = (s->mb_height << 5) - 4;
-                if (qx + px < -28) px = -28 - qx;
-                if (qy + py < -28) py = -28 - qy;
-                if (qx + px > X) px = X - qx;
-                if (qy + py > Y) py = Y - qy;
-            } else {
-                qx = (s->mb_x << 6);
-                qy = (s->mb_y << 6);
-                X  = (s->mb_width  << 6) - 4;
-                Y  = (s->mb_height << 6) - 4;
-                if (qx + px < -60) px = -60 - qx;
-                if (qy + py < -60) py = -60 - qy;
-                if (qx + px > X) px = X - qx;
-                if (qy + py > Y) py = Y - qy;
-            }
-        }
-        /* Calculate hybrid prediction as specified in 8.3.5.3.5 */
-        if (0 && !s->first_slice_line && s->mb_x) {
-            if (is_intra[xy - wrap])
-                sum = FFABS(px) + FFABS(py);
-            else
-                sum = FFABS(px - A[0]) + FFABS(py - A[1]);
-            if (sum > 32) {
-                if (get_bits1(&s->gb)) {
-                    px = A[0];
-                    py = A[1];
-                } else {
-                    px = C[0];
-                    py = C[1];
-                }
-            } else {
-                if (is_intra[xy - 2])
-                    sum = FFABS(px) + FFABS(py);
-                else
-                    sum = FFABS(px - C[0]) + FFABS(py - C[1]);
-                if (sum > 32) {
-                    if (get_bits1(&s->gb)) {
-                        px = A[0];
-                        py = A[1];
-                    } else {
-                        px = C[0];
-                        py = C[1];
-                    }
-                }
-            }
-        }
-        /* store MV using signed modulus of MV range defined in 4.11 */
-
-        s->mv[1][0][0] = ((px + dmv_x[1] + r_x) & ((r_x << 1) - 1)) - r_x;
-        s->mv[1][0][1] = ((py + dmv_y[1] + r_y) & ((r_y << 1) - 1)) - r_y;
-    }
-    s->current_picture.motion_val[0][xy][0] = s->mv[0][0][0];
-    s->current_picture.motion_val[0][xy][1] = s->mv[0][0][1];
-    s->current_picture.motion_val[1][xy][0] = s->mv[1][0][0];
-    s->current_picture.motion_val[1][xy][1] = s->mv[1][0][1];
-}
-
-static inline void vc1_pred_b_mv_intfi(VC1Context *v, int n, int *dmv_x, int *dmv_y, int mv1, int *pred_flag)
-{
-    int dir = (v->bmvtype == BMV_TYPE_BACKWARD) ? 1 : 0;
-    MpegEncContext *s = &v->s;
-    int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
-
-    if (v->bmvtype == BMV_TYPE_DIRECT) {
-        int total_opp, k, f;
-        if (s->next_picture.mb_type[mb_pos + v->mb_off] != MB_TYPE_INTRA) {
-            s->mv[0][0][0] = scale_mv(s->next_picture.motion_val[1][s->block_index[0] + v->blocks_off][0],
-                                      v->bfraction, 0, s->quarter_sample);
-            s->mv[0][0][1] = scale_mv(s->next_picture.motion_val[1][s->block_index[0] + v->blocks_off][1],
-                                      v->bfraction, 0, s->quarter_sample);
-            s->mv[1][0][0] = scale_mv(s->next_picture.motion_val[1][s->block_index[0] + v->blocks_off][0],
-                                      v->bfraction, 1, s->quarter_sample);
-            s->mv[1][0][1] = scale_mv(s->next_picture.motion_val[1][s->block_index[0] + v->blocks_off][1],
-                                      v->bfraction, 1, s->quarter_sample);
-
-            total_opp = v->mv_f_next[0][s->block_index[0] + v->blocks_off]
-                      + v->mv_f_next[0][s->block_index[1] + v->blocks_off]
-                      + v->mv_f_next[0][s->block_index[2] + v->blocks_off]
-                      + v->mv_f_next[0][s->block_index[3] + v->blocks_off];
-            f = (total_opp > 2) ? 1 : 0;
-        } else {
-            s->mv[0][0][0] = s->mv[0][0][1] = 0;
-            s->mv[1][0][0] = s->mv[1][0][1] = 0;
-            f = 0;
-        }
-        v->ref_field_type[0] = v->ref_field_type[1] = v->cur_field_type ^ f;
-        for (k = 0; k < 4; k++) {
-            s->current_picture.motion_val[0][s->block_index[k] + v->blocks_off][0] = s->mv[0][0][0];
-            s->current_picture.motion_val[0][s->block_index[k] + v->blocks_off][1] = s->mv[0][0][1];
-            s->current_picture.motion_val[1][s->block_index[k] + v->blocks_off][0] = s->mv[1][0][0];
-            s->current_picture.motion_val[1][s->block_index[k] + v->blocks_off][1] = s->mv[1][0][1];
-            v->mv_f[0][s->block_index[k] + v->blocks_off] = f;
-            v->mv_f[1][s->block_index[k] + v->blocks_off] = f;
-        }
-        return;
-    }
-    if (v->bmvtype == BMV_TYPE_INTERPOLATED) {
-        vc1_pred_mv(v, 0, dmv_x[0], dmv_y[0],   1, v->range_x, v->range_y, v->mb_type[0], pred_flag[0], 0);
-        vc1_pred_mv(v, 0, dmv_x[1], dmv_y[1],   1, v->range_x, v->range_y, v->mb_type[0], pred_flag[1], 1);
-        return;
-    }
-    if (dir) { // backward
-        vc1_pred_mv(v, n, dmv_x[1], dmv_y[1], mv1, v->range_x, v->range_y, v->mb_type[0], pred_flag[1], 1);
-        if (n == 3 || mv1) {
-            vc1_pred_mv(v, 0, dmv_x[0], dmv_y[0],   1, v->range_x, v->range_y, v->mb_type[0], 0, 0);
-        }
-    } else { // forward
-        vc1_pred_mv(v, n, dmv_x[0], dmv_y[0], mv1, v->range_x, v->range_y, v->mb_type[0], pred_flag[0], 0);
-        if (n == 3 || mv1) {
-            vc1_pred_mv(v, 0, dmv_x[1], dmv_y[1],   1, v->range_x, v->range_y, v->mb_type[0], 0, 1);
-        }
-    }
-}
-
-/** Get predicted DC value for I-frames only
- * prediction dir: left=0, top=1
- * @param s MpegEncContext
- * @param overlap flag indicating that overlap filtering is used
- * @param pq integer part of picture quantizer
- * @param[in] n block index in the current MB
- * @param dc_val_ptr Pointer to DC predictor
- * @param dir_ptr Prediction direction for use in AC prediction
- */
-static inline int vc1_i_pred_dc(MpegEncContext *s, int overlap, int pq, int n,
-                                int16_t **dc_val_ptr, int *dir_ptr)
-{
-    int a, b, c, wrap, pred, scale;
-    int16_t *dc_val;
-    static const uint16_t dcpred[32] = {
-        -1, 1024,  512,  341,  256,  205,  171,  146,  128,
-             114,  102,   93,   85,   79,   73,   68,   64,
-              60,   57,   54,   51,   49,   47,   45,   43,
-              41,   39,   38,   37,   35,   34,   33
-    };
-
-    /* find prediction - wmv3_dc_scale always used here in fact */
-    if (n < 4) scale = s->y_dc_scale;
-    else       scale = s->c_dc_scale;
-
-    wrap   = s->block_wrap[n];
-    dc_val = s->dc_val[0] + s->block_index[n];
-
-    /* B A
-     * C X
-     */
-    c = dc_val[ - 1];
-    b = dc_val[ - 1 - wrap];
-    a = dc_val[ - wrap];
-
-    if (pq < 9 || !overlap) {
-        /* Set outer values */
-        if (s->first_slice_line && (n != 2 && n != 3))
-            b = a = dcpred[scale];
-        if (s->mb_x == 0 && (n != 1 && n != 3))
-            b = c = dcpred[scale];
-    } else {
-        /* Set outer values */
-        if (s->first_slice_line && (n != 2 && n != 3))
-            b = a = 0;
-        if (s->mb_x == 0 && (n != 1 && n != 3))
-            b = c = 0;
-    }
-
-    if (abs(a - b) <= abs(b - c)) {
-        pred     = c;
-        *dir_ptr = 1; // left
-    } else {
-        pred     = a;
-        *dir_ptr = 0; // top
-    }
-
-    /* update predictor */
-    *dc_val_ptr = &dc_val[0];
-    return pred;
-}
-
-
-/** Get predicted DC value
- * prediction dir: left=0, top=1
- * @param s MpegEncContext
- * @param overlap flag indicating that overlap filtering is used
- * @param pq integer part of picture quantizer
- * @param[in] n block index in the current MB
- * @param a_avail flag indicating top block availability
- * @param c_avail flag indicating left block availability
- * @param dc_val_ptr Pointer to DC predictor
- * @param dir_ptr Prediction direction for use in AC prediction
- */
-static inline int vc1_pred_dc(MpegEncContext *s, int overlap, int pq, int n,
-                              int a_avail, int c_avail,
-                              int16_t **dc_val_ptr, int *dir_ptr)
-{
-    int a, b, c, wrap, pred;
-    int16_t *dc_val;
-    int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
-    int q1, q2 = 0;
-    int dqscale_index;
-
-    wrap = s->block_wrap[n];
-    dc_val = s->dc_val[0] + s->block_index[n];
-
-    /* B A
-     * C X
-     */
-    c = dc_val[ - 1];
-    b = dc_val[ - 1 - wrap];
-    a = dc_val[ - wrap];
-    /* scale predictors if needed */
-    q1 = s->current_picture.qscale_table[mb_pos];
-    dqscale_index = s->y_dc_scale_table[q1] - 1;
-    if (dqscale_index < 0)
-        return 0;
-    if (c_avail && (n != 1 && n != 3)) {
-        q2 = s->current_picture.qscale_table[mb_pos - 1];
-        if (q2 && q2 != q1)
-            c = (c * s->y_dc_scale_table[q2] * ff_vc1_dqscale[dqscale_index] + 0x20000) >> 18;
-    }
-    if (a_avail && (n != 2 && n != 3)) {
-        q2 = s->current_picture.qscale_table[mb_pos - s->mb_stride];
-        if (q2 && q2 != q1)
-            a = (a * s->y_dc_scale_table[q2] * ff_vc1_dqscale[dqscale_index] + 0x20000) >> 18;
-    }
-    if (a_avail && c_avail && (n != 3)) {
-        int off = mb_pos;
-        if (n != 1)
-            off--;
-        if (n != 2)
-            off -= s->mb_stride;
-        q2 = s->current_picture.qscale_table[off];
-        if (q2 && q2 != q1)
-            b = (b * s->y_dc_scale_table[q2] * ff_vc1_dqscale[dqscale_index] + 0x20000) >> 18;
-    }
-
-    if (a_avail && c_avail) {
-        if (abs(a - b) <= abs(b - c)) {
-            pred     = c;
-            *dir_ptr = 1; // left
-        } else {
-            pred     = a;
-            *dir_ptr = 0; // top
-        }
-    } else if (a_avail) {
-        pred     = a;
-        *dir_ptr = 0; // top
-    } else if (c_avail) {
-        pred     = c;
-        *dir_ptr = 1; // left
-    } else {
-        pred     = 0;
-        *dir_ptr = 1; // left
-    }
-
-    /* update predictor */
-    *dc_val_ptr = &dc_val[0];
-    return pred;
-}
-
-/** @} */ // Block group
-
-/**
- * @name VC1 Macroblock-level functions in Simple/Main Profiles
- * @see 7.1.4, p91 and 8.1.1.7, p(1)04
- * @{
- */
-
-static inline int vc1_coded_block_pred(MpegEncContext * s, int n,
-                                       uint8_t **coded_block_ptr)
-{
-    int xy, wrap, pred, a, b, c;
-
-    xy   = s->block_index[n];
-    wrap = s->b8_stride;
-
-    /* B C
-     * A X
-     */
-    a = s->coded_block[xy - 1       ];
-    b = s->coded_block[xy - 1 - wrap];
-    c = s->coded_block[xy     - wrap];
-
-    if (b == c) {
-        pred = a;
-    } else {
-        pred = c;
-    }
-
-    /* store value */
-    *coded_block_ptr = &s->coded_block[xy];
-
-    return pred;
-}
-
-/**
- * Decode one AC coefficient
- * @param v The VC1 context
- * @param last Last coefficient
- * @param skip How much zero coefficients to skip
- * @param value Decoded AC coefficient value
- * @param codingset set of VLC to decode data
- * @see 8.1.3.4
- */
-static void vc1_decode_ac_coeff(VC1Context *v, int *last, int *skip,
-                                int *value, int codingset)
-{
-    GetBitContext *gb = &v->s.gb;
-    int index, escape, run = 0, level = 0, lst = 0;
-
-    index = get_vlc2(gb, ff_vc1_ac_coeff_table[codingset].table, AC_VLC_BITS, 3);
-    if (index != ff_vc1_ac_sizes[codingset] - 1) {
-        run   = vc1_index_decode_table[codingset][index][0];
-        level = vc1_index_decode_table[codingset][index][1];
-        lst   = index >= vc1_last_decode_table[codingset] || get_bits_left(gb) < 0;
-        if (get_bits1(gb))
-            level = -level;
-    } else {
-        escape = decode210(gb);
-        if (escape != 2) {
-            index = get_vlc2(gb, ff_vc1_ac_coeff_table[codingset].table, AC_VLC_BITS, 3);
-            run   = vc1_index_decode_table[codingset][index][0];
-            level = vc1_index_decode_table[codingset][index][1];
-            lst   = index >= vc1_last_decode_table[codingset];
-            if (escape == 0) {
-                if (lst)
-                    level += vc1_last_delta_level_table[codingset][run];
-                else
-                    level += vc1_delta_level_table[codingset][run];
-            } else {
-                if (lst)
-                    run += vc1_last_delta_run_table[codingset][level] + 1;
-                else
-                    run += vc1_delta_run_table[codingset][level] + 1;
-            }
-            if (get_bits1(gb))
-                level = -level;
-        } else {
-            int sign;
-            lst = get_bits1(gb);
-            if (v->s.esc3_level_length == 0) {
-                if (v->pq < 8 || v->dquantfrm) { // table 59
-                    v->s.esc3_level_length = get_bits(gb, 3);
-                    if (!v->s.esc3_level_length)
-                        v->s.esc3_level_length = get_bits(gb, 2) + 8;
-                } else { // table 60
-                    v->s.esc3_level_length = get_unary(gb, 1, 6) + 2;
-                }
-                v->s.esc3_run_length = 3 + get_bits(gb, 2);
-            }
-            run   = get_bits(gb, v->s.esc3_run_length);
-            sign  = get_bits1(gb);
-            level = get_bits(gb, v->s.esc3_level_length);
-            if (sign)
-                level = -level;
-        }
-    }
-
-    *last  = lst;
-    *skip  = run;
-    *value = level;
-}
-
-/** Decode intra block in intra frames - should be faster than decode_intra_block
- * @param v VC1Context
- * @param block block to decode
- * @param[in] n subblock index
- * @param coded are AC coeffs present or not
- * @param codingset set of VLC to decode data
- */
-static int vc1_decode_i_block(VC1Context *v, int16_t block[64], int n,
-                              int coded, int codingset)
-{
-    GetBitContext *gb = &v->s.gb;
-    MpegEncContext *s = &v->s;
-    int dc_pred_dir = 0; /* Direction of the DC prediction used */
-    int i;
-    int16_t *dc_val;
-    int16_t *ac_val, *ac_val2;
-    int dcdiff;
-
-    /* Get DC differential */
-    if (n < 4) {
-        dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_luma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
-    } else {
-        dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_chroma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
-    }
-    if (dcdiff < 0) {
-        av_log(s->avctx, AV_LOG_ERROR, "Illegal DC VLC\n");
-        return -1;
-    }
-    if (dcdiff) {
-        if (dcdiff == 119 /* ESC index value */) {
-            /* TODO: Optimize */
-            if (v->pq == 1)      dcdiff = get_bits(gb, 10);
-            else if (v->pq == 2) dcdiff = get_bits(gb, 9);
-            else                 dcdiff = get_bits(gb, 8);
-        } else {
-            if (v->pq == 1)
-                dcdiff = (dcdiff << 2) + get_bits(gb, 2) - 3;
-            else if (v->pq == 2)
-                dcdiff = (dcdiff << 1) + get_bits1(gb)   - 1;
-        }
-        if (get_bits1(gb))
-            dcdiff = -dcdiff;
-    }
-
-    /* Prediction */
-    dcdiff += vc1_i_pred_dc(&v->s, v->overlap, v->pq, n, &dc_val, &dc_pred_dir);
-    *dc_val = dcdiff;
-
-    /* Store the quantized DC coeff, used for prediction */
-    if (n < 4) {
-        block[0] = dcdiff * s->y_dc_scale;
-    } else {
-        block[0] = dcdiff * s->c_dc_scale;
-    }
-    /* Skip ? */
-    if (!coded) {
-        goto not_coded;
-    }
-
-    // AC Decoding
-    i = 1;
-
-    {
-        int last = 0, skip, value;
-        const uint8_t *zz_table;
-        int scale;
-        int k;
-
-        scale = v->pq * 2 + v->halfpq;
-
-        if (v->s.ac_pred) {
-            if (!dc_pred_dir)
-                zz_table = v->zz_8x8[2];
-            else
-                zz_table = v->zz_8x8[3];
-        } else
-            zz_table = v->zz_8x8[1];
-
-        ac_val  = s->ac_val[0][0] + s->block_index[n] * 16;
-        ac_val2 = ac_val;
-        if (dc_pred_dir) // left
-            ac_val -= 16;
-        else // top
-            ac_val -= 16 * s->block_wrap[n];
-
-        while (!last) {
-            vc1_decode_ac_coeff(v, &last, &skip, &value, codingset);
-            i += skip;
-            if (i > 63)
-                break;
-            block[zz_table[i++]] = value;
-        }
-
-        /* apply AC prediction if needed */
-        if (s->ac_pred) {
-            if (dc_pred_dir) { // left
-                for (k = 1; k < 8; k++)
-                    block[k << v->left_blk_sh] += ac_val[k];
-            } else { // top
-                for (k = 1; k < 8; k++)
-                    block[k << v->top_blk_sh] += ac_val[k + 8];
-            }
-        }
-        /* save AC coeffs for further prediction */
-        for (k = 1; k < 8; k++) {
-            ac_val2[k]     = block[k << v->left_blk_sh];
-            ac_val2[k + 8] = block[k << v->top_blk_sh];
-        }
-
-        /* scale AC coeffs */
-        for (k = 1; k < 64; k++)
-            if (block[k]) {
-                block[k] *= scale;
-                if (!v->pquantizer)
-                    block[k] += (block[k] < 0) ? -v->pq : v->pq;
-            }
-
-        if (s->ac_pred) i = 63;
-    }
-
-not_coded:
-    if (!coded) {
-        int k, scale;
-        ac_val  = s->ac_val[0][0] + s->block_index[n] * 16;
-        ac_val2 = ac_val;
-
-        i = 0;
-        scale = v->pq * 2 + v->halfpq;
-        memset(ac_val2, 0, 16 * 2);
-        if (dc_pred_dir) { // left
-            ac_val -= 16;
-            if (s->ac_pred)
-                memcpy(ac_val2, ac_val, 8 * 2);
-        } else { // top
-            ac_val -= 16 * s->block_wrap[n];
-            if (s->ac_pred)
-                memcpy(ac_val2 + 8, ac_val + 8, 8 * 2);
-        }
-
-        /* apply AC prediction if needed */
-        if (s->ac_pred) {
-            if (dc_pred_dir) { //left
-                for (k = 1; k < 8; k++) {
-                    block[k << v->left_blk_sh] = ac_val[k] * scale;
-                    if (!v->pquantizer && block[k << v->left_blk_sh])
-                        block[k << v->left_blk_sh] += (block[k << v->left_blk_sh] < 0) ? -v->pq : v->pq;
-                }
-            } else { // top
-                for (k = 1; k < 8; k++) {
-                    block[k << v->top_blk_sh] = ac_val[k + 8] * scale;
-                    if (!v->pquantizer && block[k << v->top_blk_sh])
-                        block[k << v->top_blk_sh] += (block[k << v->top_blk_sh] < 0) ? -v->pq : v->pq;
-                }
-            }
-            i = 63;
-        }
-    }
-    s->block_last_index[n] = i;
-
-    return 0;
-}
-
-/** Decode intra block in intra frames - should be faster than decode_intra_block
- * @param v VC1Context
- * @param block block to decode
- * @param[in] n subblock number
- * @param coded are AC coeffs present or not
- * @param codingset set of VLC to decode data
- * @param mquant quantizer value for this macroblock
- */
-static int vc1_decode_i_block_adv(VC1Context *v, int16_t block[64], int n,
-                                  int coded, int codingset, int mquant)
-{
-    GetBitContext *gb = &v->s.gb;
-    MpegEncContext *s = &v->s;
-    int dc_pred_dir = 0; /* Direction of the DC prediction used */
-    int i;
-    int16_t *dc_val;
-    int16_t *ac_val, *ac_val2;
-    int dcdiff;
-    int a_avail = v->a_avail, c_avail = v->c_avail;
-    int use_pred = s->ac_pred;
-    int scale;
-    int q1, q2 = 0;
-    int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
-
-    /* Get DC differential */
-    if (n < 4) {
-        dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_luma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
-    } else {
-        dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_chroma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
-    }
-    if (dcdiff < 0) {
-        av_log(s->avctx, AV_LOG_ERROR, "Illegal DC VLC\n");
-        return -1;
-    }
-    if (dcdiff) {
-        if (dcdiff == 119 /* ESC index value */) {
-            /* TODO: Optimize */
-            if (mquant == 1)      dcdiff = get_bits(gb, 10);
-            else if (mquant == 2) dcdiff = get_bits(gb, 9);
-            else                  dcdiff = get_bits(gb, 8);
-        } else {
-            if (mquant == 1)
-                dcdiff = (dcdiff << 2) + get_bits(gb, 2) - 3;
-            else if (mquant == 2)
-                dcdiff = (dcdiff << 1) + get_bits1(gb)   - 1;
-        }
-        if (get_bits1(gb))
-            dcdiff = -dcdiff;
-    }
-
-    /* Prediction */
-    dcdiff += vc1_pred_dc(&v->s, v->overlap, mquant, n, v->a_avail, v->c_avail, &dc_val, &dc_pred_dir);
-    *dc_val = dcdiff;
-
-    /* Store the quantized DC coeff, used for prediction */
-    if (n < 4) {
-        block[0] = dcdiff * s->y_dc_scale;
-    } else {
-        block[0] = dcdiff * s->c_dc_scale;
-    }
-
-    //AC Decoding
-    i = 1;
-
-    /* check if AC is needed at all */
-    if (!a_avail && !c_avail)
-        use_pred = 0;
-    ac_val  = s->ac_val[0][0] + s->block_index[n] * 16;
-    ac_val2 = ac_val;
-
-    scale = mquant * 2 + ((mquant == v->pq) ? v->halfpq : 0);
-
-    if (dc_pred_dir) // left
-        ac_val -= 16;
-    else // top
-        ac_val -= 16 * s->block_wrap[n];
-
-    q1 = s->current_picture.qscale_table[mb_pos];
-    if ( dc_pred_dir && c_avail && mb_pos)
-        q2 = s->current_picture.qscale_table[mb_pos - 1];
-    if (!dc_pred_dir && a_avail && mb_pos >= s->mb_stride)
-        q2 = s->current_picture.qscale_table[mb_pos - s->mb_stride];
-    if ( dc_pred_dir && n == 1)
-        q2 = q1;
-    if (!dc_pred_dir && n == 2)
-        q2 = q1;
-    if (n == 3)
-        q2 = q1;
-
-    if (coded) {
-        int last = 0, skip, value;
-        const uint8_t *zz_table;
-        int k;
-
-        if (v->s.ac_pred) {
-            if (!use_pred && v->fcm == ILACE_FRAME) {
-                zz_table = v->zzi_8x8;
-            } else {
-                if (!dc_pred_dir) // top
-                    zz_table = v->zz_8x8[2];
-                else // left
-                    zz_table = v->zz_8x8[3];
-            }
-        } else {
-            if (v->fcm != ILACE_FRAME)
-                zz_table = v->zz_8x8[1];
-            else
-                zz_table = v->zzi_8x8;
-        }
-
-        while (!last) {
-            vc1_decode_ac_coeff(v, &last, &skip, &value, codingset);
-            i += skip;
-            if (i > 63)
-                break;
-            block[zz_table[i++]] = value;
-        }
-
-        /* apply AC prediction if needed */
-        if (use_pred) {
-            /* scale predictors if needed*/
-            if (q2 && q1 != q2) {
-                q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;
-                q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;
-
-                if (q1 < 1)
-                    return AVERROR_INVALIDDATA;
-                if (dc_pred_dir) { // left
-                    for (k = 1; k < 8; k++)
-                        block[k << v->left_blk_sh] += (ac_val[k] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
-                } else { // top
-                    for (k = 1; k < 8; k++)
-                        block[k << v->top_blk_sh] += (ac_val[k + 8] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
-                }
-            } else {
-                if (dc_pred_dir) { //left
-                    for (k = 1; k < 8; k++)
-                        block[k << v->left_blk_sh] += ac_val[k];
-                } else { //top
-                    for (k = 1; k < 8; k++)
-                        block[k << v->top_blk_sh] += ac_val[k + 8];
-                }
-            }
-        }
-        /* save AC coeffs for further prediction */
-        for (k = 1; k < 8; k++) {
-            ac_val2[k    ] = block[k << v->left_blk_sh];
-            ac_val2[k + 8] = block[k << v->top_blk_sh];
-        }
-
-        /* scale AC coeffs */
-        for (k = 1; k < 64; k++)
-            if (block[k]) {
-                block[k] *= scale;
-                if (!v->pquantizer)
-                    block[k] += (block[k] < 0) ? -mquant : mquant;
-            }
-
-        if (use_pred) i = 63;
-    } else { // no AC coeffs
-        int k;
-
-        memset(ac_val2, 0, 16 * 2);
-        if (dc_pred_dir) { // left
-            if (use_pred) {
-                memcpy(ac_val2, ac_val, 8 * 2);
-                if (q2 && q1 != q2) {
-                    q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;
-                    q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;
-                    if (q1 < 1)
-                        return AVERROR_INVALIDDATA;
-                    for (k = 1; k < 8; k++)
-                        ac_val2[k] = (ac_val2[k] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
-                }
-            }
-        } else { // top
-            if (use_pred) {
-                memcpy(ac_val2 + 8, ac_val + 8, 8 * 2);
-                if (q2 && q1 != q2) {
-                    q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;
-                    q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;
-                    if (q1 < 1)
-                        return AVERROR_INVALIDDATA;
-                    for (k = 1; k < 8; k++)
-                        ac_val2[k + 8] = (ac_val2[k + 8] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
-                }
-            }
-        }
-
-        /* apply AC prediction if needed */
-        if (use_pred) {
-            if (dc_pred_dir) { // left
-                for (k = 1; k < 8; k++) {
-                    block[k << v->left_blk_sh] = ac_val2[k] * scale;
-                    if (!v->pquantizer && block[k << v->left_blk_sh])
-                        block[k << v->left_blk_sh] += (block[k << v->left_blk_sh] < 0) ? -mquant : mquant;
-                }
-            } else { // top
-                for (k = 1; k < 8; k++) {
-                    block[k << v->top_blk_sh] = ac_val2[k + 8] * scale;
-                    if (!v->pquantizer && block[k << v->top_blk_sh])
-                        block[k << v->top_blk_sh] += (block[k << v->top_blk_sh] < 0) ? -mquant : mquant;
-                }
-            }
-            i = 63;
-        }
-    }
-    s->block_last_index[n] = i;
-
-    return 0;
-}
-
-/** Decode intra block in inter frames - more generic version than vc1_decode_i_block
- * @param v VC1Context
- * @param block block to decode
- * @param[in] n subblock index
- * @param coded are AC coeffs present or not
- * @param mquant block quantizer
- * @param codingset set of VLC to decode data
- */
-static int vc1_decode_intra_block(VC1Context *v, int16_t block[64], int n,
-                                  int coded, int mquant, int codingset)
-{
-    GetBitContext *gb = &v->s.gb;
-    MpegEncContext *s = &v->s;
-    int dc_pred_dir = 0; /* Direction of the DC prediction used */
-    int i;
-    int16_t *dc_val;
-    int16_t *ac_val, *ac_val2;
-    int dcdiff;
-    int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
-    int a_avail = v->a_avail, c_avail = v->c_avail;
-    int use_pred = s->ac_pred;
-    int scale;
-    int q1, q2 = 0;
-
-    s->bdsp.clear_block(block);
-
-    /* XXX: Guard against dumb values of mquant */
-    mquant = (mquant < 1) ? 0 : ((mquant > 31) ? 31 : mquant);
-
-    /* Set DC scale - y and c use the same */
-    s->y_dc_scale = s->y_dc_scale_table[mquant];
-    s->c_dc_scale = s->c_dc_scale_table[mquant];
-
-    /* Get DC differential */
-    if (n < 4) {
-        dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_luma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
-    } else {
-        dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_chroma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
-    }
-    if (dcdiff < 0) {
-        av_log(s->avctx, AV_LOG_ERROR, "Illegal DC VLC\n");
-        return -1;
-    }
-    if (dcdiff) {
-        if (dcdiff == 119 /* ESC index value */) {
-            /* TODO: Optimize */
-            if (mquant == 1)      dcdiff = get_bits(gb, 10);
-            else if (mquant == 2) dcdiff = get_bits(gb, 9);
-            else                  dcdiff = get_bits(gb, 8);
-        } else {
-            if (mquant == 1)
-                dcdiff = (dcdiff << 2) + get_bits(gb, 2) - 3;
-            else if (mquant == 2)
-                dcdiff = (dcdiff << 1) + get_bits1(gb)   - 1;
-        }
-        if (get_bits1(gb))
-            dcdiff = -dcdiff;
-    }
-
-    /* Prediction */
-    dcdiff += vc1_pred_dc(&v->s, v->overlap, mquant, n, a_avail, c_avail, &dc_val, &dc_pred_dir);
-    *dc_val = dcdiff;
-
-    /* Store the quantized DC coeff, used for prediction */
-
-    if (n < 4) {
-        block[0] = dcdiff * s->y_dc_scale;
-    } else {
-        block[0] = dcdiff * s->c_dc_scale;
-    }
-
-    //AC Decoding
-    i = 1;
-
-    /* check if AC is needed at all and adjust direction if needed */
-    if (!a_avail) dc_pred_dir = 1;
-    if (!c_avail) dc_pred_dir = 0;
-    if (!a_avail && !c_avail) use_pred = 0;
-    ac_val = s->ac_val[0][0] + s->block_index[n] * 16;
-    ac_val2 = ac_val;
-
-    scale = mquant * 2 + v->halfpq;
-
-    if (dc_pred_dir) //left
-        ac_val -= 16;
-    else //top
-        ac_val -= 16 * s->block_wrap[n];
-
-    q1 = s->current_picture.qscale_table[mb_pos];
-    if (dc_pred_dir && c_avail && mb_pos)
-        q2 = s->current_picture.qscale_table[mb_pos - 1];
-    if (!dc_pred_dir && a_avail && mb_pos >= s->mb_stride)
-        q2 = s->current_picture.qscale_table[mb_pos - s->mb_stride];
-    if ( dc_pred_dir && n == 1)
-        q2 = q1;
-    if (!dc_pred_dir && n == 2)
-        q2 = q1;
-    if (n == 3) q2 = q1;
-
-    if (coded) {
-        int last = 0, skip, value;
-        int k;
-
-        while (!last) {
-            vc1_decode_ac_coeff(v, &last, &skip, &value, codingset);
-            i += skip;
-            if (i > 63)
-                break;
-            if (v->fcm == PROGRESSIVE)
-                block[v->zz_8x8[0][i++]] = value;
-            else {
-                if (use_pred && (v->fcm == ILACE_FRAME)) {
-                    if (!dc_pred_dir) // top
-                        block[v->zz_8x8[2][i++]] = value;
-                    else // left
-                        block[v->zz_8x8[3][i++]] = value;
-                } else {
-                    block[v->zzi_8x8[i++]] = value;
-                }
-            }
-        }
-
-        /* apply AC prediction if needed */
-        if (use_pred) {
-            /* scale predictors if needed*/
-            if (q2 && q1 != q2) {
-                q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;
-                q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;
-
-                if (q1 < 1)
-                    return AVERROR_INVALIDDATA;
-                if (dc_pred_dir) { // left
-                    for (k = 1; k < 8; k++)
-                        block[k << v->left_blk_sh] += (ac_val[k] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
-                } else { //top
-                    for (k = 1; k < 8; k++)
-                        block[k << v->top_blk_sh] += (ac_val[k + 8] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
-                }
-            } else {
-                if (dc_pred_dir) { // left
-                    for (k = 1; k < 8; k++)
-                        block[k << v->left_blk_sh] += ac_val[k];
-                } else { // top
-                    for (k = 1; k < 8; k++)
-                        block[k << v->top_blk_sh] += ac_val[k + 8];
-                }
-            }
-        }
-        /* save AC coeffs for further prediction */
-        for (k = 1; k < 8; k++) {
-            ac_val2[k    ] = block[k << v->left_blk_sh];
-            ac_val2[k + 8] = block[k << v->top_blk_sh];
-        }
-
-        /* scale AC coeffs */
-        for (k = 1; k < 64; k++)
-            if (block[k]) {
-                block[k] *= scale;
-                if (!v->pquantizer)
-                    block[k] += (block[k] < 0) ? -mquant : mquant;
-            }
-
-        if (use_pred) i = 63;
-    } else { // no AC coeffs
-        int k;
-
-        memset(ac_val2, 0, 16 * 2);
-        if (dc_pred_dir) { // left
-            if (use_pred) {
-                memcpy(ac_val2, ac_val, 8 * 2);
-                if (q2 && q1 != q2) {
-                    q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;
-                    q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;
-                    if (q1 < 1)
-                        return AVERROR_INVALIDDATA;
-                    for (k = 1; k < 8; k++)
-                        ac_val2[k] = (ac_val2[k] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
-                }
-            }
-        } else { // top
-            if (use_pred) {
-                memcpy(ac_val2 + 8, ac_val + 8, 8 * 2);
-                if (q2 && q1 != q2) {
-                    q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;
-                    q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;
-                    if (q1 < 1)
-                        return AVERROR_INVALIDDATA;
-                    for (k = 1; k < 8; k++)
-                        ac_val2[k + 8] = (ac_val2[k + 8] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
-                }
-            }
-        }
-
-        /* apply AC prediction if needed */
-        if (use_pred) {
-            if (dc_pred_dir) { // left
-                for (k = 1; k < 8; k++) {
-                    block[k << v->left_blk_sh] = ac_val2[k] * scale;
-                    if (!v->pquantizer && block[k << v->left_blk_sh])
-                        block[k << v->left_blk_sh] += (block[k << v->left_blk_sh] < 0) ? -mquant : mquant;
-                }
-            } else { // top
-                for (k = 1; k < 8; k++) {
-                    block[k << v->top_blk_sh] = ac_val2[k + 8] * scale;
-                    if (!v->pquantizer && block[k << v->top_blk_sh])
-                        block[k << v->top_blk_sh] += (block[k << v->top_blk_sh] < 0) ? -mquant : mquant;
-                }
-            }
-            i = 63;
-        }
-    }
-    s->block_last_index[n] = i;
-
-    return 0;
-}
-
-/** Decode P block
- */
-static int vc1_decode_p_block(VC1Context *v, int16_t block[64], int n,
-                              int mquant, int ttmb, int first_block,
-                              uint8_t *dst, int linesize, int skip_block,
-                              int *ttmb_out)
-{
-    MpegEncContext *s = &v->s;
-    GetBitContext *gb = &s->gb;
-    int i, j;
-    int subblkpat = 0;
-    int scale, off, idx, last, skip, value;
-    int ttblk = ttmb & 7;
-    int pat = 0;
-
-    s->bdsp.clear_block(block);
-
-    if (ttmb == -1) {
-        ttblk = ff_vc1_ttblk_to_tt[v->tt_index][get_vlc2(gb, ff_vc1_ttblk_vlc[v->tt_index].table, VC1_TTBLK_VLC_BITS, 1)];
-    }
-    if (ttblk == TT_4X4) {
-        subblkpat = ~(get_vlc2(gb, ff_vc1_subblkpat_vlc[v->tt_index].table, VC1_SUBBLKPAT_VLC_BITS, 1) + 1);
-    }
-    if ((ttblk != TT_8X8 && ttblk != TT_4X4)
-        && ((v->ttmbf || (ttmb != -1 && (ttmb & 8) && !first_block))
-            || (!v->res_rtm_flag && !first_block))) {
-        subblkpat = decode012(gb);
-        if (subblkpat)
-            subblkpat ^= 3; // swap decoded pattern bits
-        if (ttblk == TT_8X4_TOP || ttblk == TT_8X4_BOTTOM)
-            ttblk = TT_8X4;
-        if (ttblk == TT_4X8_RIGHT || ttblk == TT_4X8_LEFT)
-            ttblk = TT_4X8;
-    }
-    scale = 2 * mquant + ((v->pq == mquant) ? v->halfpq : 0);
-
-    // convert transforms like 8X4_TOP to generic TT and SUBBLKPAT
-    if (ttblk == TT_8X4_TOP || ttblk == TT_8X4_BOTTOM) {
-        subblkpat = 2 - (ttblk == TT_8X4_TOP);
-        ttblk     = TT_8X4;
-    }
-    if (ttblk == TT_4X8_RIGHT || ttblk == TT_4X8_LEFT) {
-        subblkpat = 2 - (ttblk == TT_4X8_LEFT);
-        ttblk     = TT_4X8;
-    }
-    switch (ttblk) {
-    case TT_8X8:
-        pat  = 0xF;
-        i    = 0;
-        last = 0;
-        while (!last) {
-            vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);
-            i += skip;
-            if (i > 63)
-                break;
-            if (!v->fcm)
-                idx = v->zz_8x8[0][i++];
-            else
-                idx = v->zzi_8x8[i++];
-            block[idx] = value * scale;
-            if (!v->pquantizer)
-                block[idx] += (block[idx] < 0) ? -mquant : mquant;
-        }
-        if (!skip_block) {
-            if (i == 1)
-                v->vc1dsp.vc1_inv_trans_8x8_dc(dst, linesize, block);
-            else {
-                v->vc1dsp.vc1_inv_trans_8x8(block);
-                s->idsp.add_pixels_clamped(block, dst, linesize);
-            }
-        }
-        break;
-    case TT_4X4:
-        pat = ~subblkpat & 0xF;
-        for (j = 0; j < 4; j++) {
-            last = subblkpat & (1 << (3 - j));
-            i    = 0;
-            off  = (j & 1) * 4 + (j & 2) * 16;
-            while (!last) {
-                vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);
-                i += skip;
-                if (i > 15)
-                    break;
-                if (!v->fcm)
-                    idx = ff_vc1_simple_progressive_4x4_zz[i++];
-                else
-                    idx = ff_vc1_adv_interlaced_4x4_zz[i++];
-                block[idx + off] = value * scale;
-                if (!v->pquantizer)
-                    block[idx + off] += (block[idx + off] < 0) ? -mquant : mquant;
-            }
-            if (!(subblkpat & (1 << (3 - j))) && !skip_block) {
-                if (i == 1)
-                    v->vc1dsp.vc1_inv_trans_4x4_dc(dst + (j & 1) * 4 + (j & 2) * 2 * linesize, linesize, block + off);
-                else
-                    v->vc1dsp.vc1_inv_trans_4x4(dst + (j & 1) * 4 + (j & 2) *  2 * linesize, linesize, block + off);
-            }
-        }
-        break;
-    case TT_8X4:
-        pat = ~((subblkpat & 2) * 6 + (subblkpat & 1) * 3) & 0xF;
-        for (j = 0; j < 2; j++) {
-            last = subblkpat & (1 << (1 - j));
-            i    = 0;
-            off  = j * 32;
-            while (!last) {
-                vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);
-                i += skip;
-                if (i > 31)
-                    break;
-                if (!v->fcm)
-                    idx = v->zz_8x4[i++] + off;
-                else
-                    idx = ff_vc1_adv_interlaced_8x4_zz[i++] + off;
-                block[idx] = value * scale;
-                if (!v->pquantizer)
-                    block[idx] += (block[idx] < 0) ? -mquant : mquant;
-            }
-            if (!(subblkpat & (1 << (1 - j))) && !skip_block) {
-                if (i == 1)
-                    v->vc1dsp.vc1_inv_trans_8x4_dc(dst + j * 4 * linesize, linesize, block + off);
-                else
-                    v->vc1dsp.vc1_inv_trans_8x4(dst + j * 4 * linesize, linesize, block + off);
-            }
-        }
-        break;
-    case TT_4X8:
-        pat = ~(subblkpat * 5) & 0xF;
-        for (j = 0; j < 2; j++) {
-            last = subblkpat & (1 << (1 - j));
-            i    = 0;
-            off  = j * 4;
-            while (!last) {
-                vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);
-                i += skip;
-                if (i > 31)
-                    break;
-                if (!v->fcm)
-                    idx = v->zz_4x8[i++] + off;
-                else
-                    idx = ff_vc1_adv_interlaced_4x8_zz[i++] + off;
-                block[idx] = value * scale;
-                if (!v->pquantizer)
-                    block[idx] += (block[idx] < 0) ? -mquant : mquant;
-            }
-            if (!(subblkpat & (1 << (1 - j))) && !skip_block) {
-                if (i == 1)
-                    v->vc1dsp.vc1_inv_trans_4x8_dc(dst + j * 4, linesize, block + off);
-                else
-                    v->vc1dsp.vc1_inv_trans_4x8(dst + j*4, linesize, block + off);
-            }
-        }
-        break;
-    }
-    if (ttmb_out)
-        *ttmb_out |= ttblk << (n * 4);
-    return pat;
-}
-
-/** @} */ // Macroblock group
-
-static const int size_table  [6] = { 0, 2, 3, 4,  5,  8 };
-static const int offset_table[6] = { 0, 1, 3, 7, 15, 31 };
-
-static av_always_inline void vc1_apply_p_v_loop_filter(VC1Context *v, int block_num)
-{
-    MpegEncContext *s  = &v->s;
-    int mb_cbp         = v->cbp[s->mb_x - s->mb_stride],
-        block_cbp      = mb_cbp      >> (block_num * 4), bottom_cbp,
-        mb_is_intra    = v->is_intra[s->mb_x - s->mb_stride],
-        block_is_intra = mb_is_intra >> (block_num * 4), bottom_is_intra;
-    int idx, linesize  = block_num > 3 ? s->uvlinesize : s->linesize, ttblk;
-    uint8_t *dst;
-
-    if (block_num > 3) {
-        dst      = s->dest[block_num - 3];
-    } else {
-        dst      = s->dest[0] + (block_num & 1) * 8 + ((block_num & 2) * 4 - 8) * linesize;
-    }
-    if (s->mb_y != s->end_mb_y || block_num < 2) {
-        int16_t (*mv)[2];
-        int mv_stride;
-
-        if (block_num > 3) {
-            bottom_cbp      = v->cbp[s->mb_x]      >> (block_num * 4);
-            bottom_is_intra = v->is_intra[s->mb_x] >> (block_num * 4);
-            mv              = &v->luma_mv[s->mb_x - s->mb_stride];
-            mv_stride       = s->mb_stride;
-        } else {
-            bottom_cbp      = (block_num < 2) ? (mb_cbp               >> ((block_num + 2) * 4))
-                                              : (v->cbp[s->mb_x]      >> ((block_num - 2) * 4));
-            bottom_is_intra = (block_num < 2) ? (mb_is_intra          >> ((block_num + 2) * 4))
-                                              : (v->is_intra[s->mb_x] >> ((block_num - 2) * 4));
-            mv_stride       = s->b8_stride;
-            mv              = &s->current_picture.motion_val[0][s->block_index[block_num] - 2 * mv_stride];
-        }
-
-        if (bottom_is_intra & 1 || block_is_intra & 1 ||
-            mv[0][0] != mv[mv_stride][0] || mv[0][1] != mv[mv_stride][1]) {
-            v->vc1dsp.vc1_v_loop_filter8(dst, linesize, v->pq);
-        } else {
-            idx = ((bottom_cbp >> 2) | block_cbp) & 3;
-            if (idx == 3) {
-                v->vc1dsp.vc1_v_loop_filter8(dst, linesize, v->pq);
-            } else if (idx) {
-                if (idx == 1)
-                    v->vc1dsp.vc1_v_loop_filter4(dst + 4, linesize, v->pq);
-                else
-                    v->vc1dsp.vc1_v_loop_filter4(dst,     linesize, v->pq);
-            }
-        }
-    }
-
-    dst -= 4 * linesize;
-    ttblk = (v->ttblk[s->mb_x - s->mb_stride] >> (block_num * 4)) & 0xF;
-    if (ttblk == TT_4X4 || ttblk == TT_8X4) {
-        idx = (block_cbp | (block_cbp >> 2)) & 3;
-        if (idx == 3) {
-            v->vc1dsp.vc1_v_loop_filter8(dst, linesize, v->pq);
-        } else if (idx) {
-            if (idx == 1)
-                v->vc1dsp.vc1_v_loop_filter4(dst + 4, linesize, v->pq);
-            else
-                v->vc1dsp.vc1_v_loop_filter4(dst,     linesize, v->pq);
-        }
-    }
-}
-
-static av_always_inline void vc1_apply_p_h_loop_filter(VC1Context *v, int block_num)
-{
-    MpegEncContext *s  = &v->s;
-    int mb_cbp         = v->cbp[s->mb_x - 1 - s->mb_stride],
-        block_cbp      = mb_cbp      >> (block_num * 4), right_cbp,
-        mb_is_intra    = v->is_intra[s->mb_x - 1 - s->mb_stride],
-        block_is_intra = mb_is_intra >> (block_num * 4), right_is_intra;
-    int idx, linesize  = block_num > 3 ? s->uvlinesize : s->linesize, ttblk;
-    uint8_t *dst;
-
-    if (block_num > 3) {
-        dst = s->dest[block_num - 3] - 8 * linesize;
-    } else {
-        dst = s->dest[0] + (block_num & 1) * 8 + ((block_num & 2) * 4 - 16) * linesize - 8;
-    }
-
-    if (s->mb_x != s->mb_width || !(block_num & 5)) {
-        int16_t (*mv)[2];
-
-        if (block_num > 3) {
-            right_cbp      = v->cbp[s->mb_x - s->mb_stride] >> (block_num * 4);
-            right_is_intra = v->is_intra[s->mb_x - s->mb_stride] >> (block_num * 4);
-            mv             = &v->luma_mv[s->mb_x - s->mb_stride - 1];
-        } else {
-            right_cbp      = (block_num & 1) ? (v->cbp[s->mb_x - s->mb_stride]      >> ((block_num - 1) * 4))
-                                             : (mb_cbp                              >> ((block_num + 1) * 4));
-            right_is_intra = (block_num & 1) ? (v->is_intra[s->mb_x - s->mb_stride] >> ((block_num - 1) * 4))
-                                             : (mb_is_intra                         >> ((block_num + 1) * 4));
-            mv             = &s->current_picture.motion_val[0][s->block_index[block_num] - s->b8_stride * 2 - 2];
-        }
-        if (block_is_intra & 1 || right_is_intra & 1 || mv[0][0] != mv[1][0] || mv[0][1] != mv[1][1]) {
-            v->vc1dsp.vc1_h_loop_filter8(dst, linesize, v->pq);
-        } else {
-            idx = ((right_cbp >> 1) | block_cbp) & 5; // FIXME check
-            if (idx == 5) {
-                v->vc1dsp.vc1_h_loop_filter8(dst, linesize, v->pq);
-            } else if (idx) {
-                if (idx == 1)
-                    v->vc1dsp.vc1_h_loop_filter4(dst + 4 * linesize, linesize, v->pq);
-                else
-                    v->vc1dsp.vc1_h_loop_filter4(dst,                linesize, v->pq);
-            }
-        }
-    }
-
-    dst -= 4;
-    ttblk = (v->ttblk[s->mb_x - s->mb_stride - 1] >> (block_num * 4)) & 0xf;
-    if (ttblk == TT_4X4 || ttblk == TT_4X8) {
-        idx = (block_cbp | (block_cbp >> 1)) & 5;
-        if (idx == 5) {
-            v->vc1dsp.vc1_h_loop_filter8(dst, linesize, v->pq);
-        } else if (idx) {
-            if (idx == 1)
-                v->vc1dsp.vc1_h_loop_filter4(dst + linesize * 4, linesize, v->pq);
-            else
-                v->vc1dsp.vc1_h_loop_filter4(dst,                linesize, v->pq);
-        }
-    }
-}
-
-static void vc1_apply_p_loop_filter(VC1Context *v)
-{
-    MpegEncContext *s = &v->s;
-    int i;
-
-    for (i = 0; i < 6; i++) {
-        vc1_apply_p_v_loop_filter(v, i);
-    }
-
-    /* V always precedes H, therefore we run H one MB before V;
-     * at the end of a row, we catch up to complete the row */
-    if (s->mb_x) {
-        for (i = 0; i < 6; i++) {
-            vc1_apply_p_h_loop_filter(v, i);
-        }
-        if (s->mb_x == s->mb_width - 1) {
-            s->mb_x++;
-            ff_update_block_index(s);
-            for (i = 0; i < 6; i++) {
-                vc1_apply_p_h_loop_filter(v, i);
-            }
-        }
-    }
-}
-
-/** Decode one P-frame MB
- */
-static int vc1_decode_p_mb(VC1Context *v)
-{
-    MpegEncContext *s = &v->s;
-    GetBitContext *gb = &s->gb;
-    int i, j;
-    int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
-    int cbp; /* cbp decoding stuff */
-    int mqdiff, mquant; /* MB quantization */
-    int ttmb = v->ttfrm; /* MB Transform type */
-
-    int mb_has_coeffs = 1; /* last_flag */
-    int dmv_x, dmv_y; /* Differential MV components */
-    int index, index1; /* LUT indexes */
-    int val, sign; /* temp values */
-    int first_block = 1;
-    int dst_idx, off;
-    int skipped, fourmv;
-    int block_cbp = 0, pat, block_tt = 0, block_intra = 0;
-
-    mquant = v->pq; /* lossy initialization */
-
-    if (v->mv_type_is_raw)
-        fourmv = get_bits1(gb);
-    else
-        fourmv = v->mv_type_mb_plane[mb_pos];
-    if (v->skip_is_raw)
-        skipped = get_bits1(gb);
-    else
-        skipped = v->s.mbskip_table[mb_pos];
-
-    if (!fourmv) { /* 1MV mode */
-        if (!skipped) {
-            GET_MVDATA(dmv_x, dmv_y);
-
-            if (s->mb_intra) {
-                s->current_picture.motion_val[1][s->block_index[0]][0] = 0;
-                s->current_picture.motion_val[1][s->block_index[0]][1] = 0;
-            }
-            s->current_picture.mb_type[mb_pos] = s->mb_intra ? MB_TYPE_INTRA : MB_TYPE_16x16;
-            vc1_pred_mv(v, 0, dmv_x, dmv_y, 1, v->range_x, v->range_y, v->mb_type[0], 0, 0);
-
-            /* FIXME Set DC val for inter block ? */
-            if (s->mb_intra && !mb_has_coeffs) {
-                GET_MQUANT();
-                s->ac_pred = get_bits1(gb);
-                cbp        = 0;
-            } else if (mb_has_coeffs) {
-                if (s->mb_intra)
-                    s->ac_pred = get_bits1(gb);
-                cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
-                GET_MQUANT();
-            } else {
-                mquant = v->pq;
-                cbp    = 0;
-            }
-            s->current_picture.qscale_table[mb_pos] = mquant;
-
-            if (!v->ttmbf && !s->mb_intra && mb_has_coeffs)
-                ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table,
-                                VC1_TTMB_VLC_BITS, 2);
-            if (!s->mb_intra) vc1_mc_1mv(v, 0);
-            dst_idx = 0;
-            for (i = 0; i < 6; i++) {
-                s->dc_val[0][s->block_index[i]] = 0;
-                dst_idx += i >> 2;
-                val = ((cbp >> (5 - i)) & 1);
-                off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);
-                v->mb_type[0][s->block_index[i]] = s->mb_intra;
-                if (s->mb_intra) {
-                    /* check if prediction blocks A and C are available */
-                    v->a_avail = v->c_avail = 0;
-                    if (i == 2 || i == 3 || !s->first_slice_line)
-                        v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];
-                    if (i == 1 || i == 3 || s->mb_x)
-                        v->c_avail = v->mb_type[0][s->block_index[i] - 1];
-
-                    vc1_decode_intra_block(v, s->block[i], i, val, mquant,
-                                           (i & 4) ? v->codingset2 : v->codingset);
-                    if ((i>3) && (s->flags & CODEC_FLAG_GRAY))
-                        continue;
-                    v->vc1dsp.vc1_inv_trans_8x8(s->block[i]);
-                    if (v->rangeredfrm)
-                        for (j = 0; j < 64; j++)
-                            s->block[i][j] <<= 1;
-                    s->idsp.put_signed_pixels_clamped(s->block[i],
-                                                      s->dest[dst_idx] + off,
-                                                      i & 4 ? s->uvlinesize
-                                                            : s->linesize);
-                    if (v->pq >= 9 && v->overlap) {
-                        if (v->c_avail)
-                            v->vc1dsp.vc1_h_overlap(s->dest[dst_idx] + off, i & 4 ? s->uvlinesize : s->linesize);
-                        if (v->a_avail)
-                            v->vc1dsp.vc1_v_overlap(s->dest[dst_idx] + off, i & 4 ? s->uvlinesize : s->linesize);
-                    }
-                    block_cbp   |= 0xF << (i << 2);
-                    block_intra |= 1 << i;
-                } else if (val) {
-                    pat = vc1_decode_p_block(v, s->block[i], i, mquant, ttmb, first_block,
-                                             s->dest[dst_idx] + off, (i & 4) ? s->uvlinesize : s->linesize,
-                                             (i & 4) && (s->flags & CODEC_FLAG_GRAY), &block_tt);
-                    block_cbp |= pat << (i << 2);
-                    if (!v->ttmbf && ttmb < 8)
-                        ttmb = -1;
-                    first_block = 0;
-                }
-            }
-        } else { // skipped
-            s->mb_intra = 0;
-            for (i = 0; i < 6; i++) {
-                v->mb_type[0][s->block_index[i]] = 0;
-                s->dc_val[0][s->block_index[i]]  = 0;
-            }
-            s->current_picture.mb_type[mb_pos]      = MB_TYPE_SKIP;
-            s->current_picture.qscale_table[mb_pos] = 0;
-            vc1_pred_mv(v, 0, 0, 0, 1, v->range_x, v->range_y, v->mb_type[0], 0, 0);
-            vc1_mc_1mv(v, 0);
-        }
-    } else { // 4MV mode
-        if (!skipped /* unskipped MB */) {
-            int intra_count = 0, coded_inter = 0;
-            int is_intra[6], is_coded[6];
-            /* Get CBPCY */
-            cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
-            for (i = 0; i < 6; i++) {
-                val = ((cbp >> (5 - i)) & 1);
-                s->dc_val[0][s->block_index[i]] = 0;
-                s->mb_intra                     = 0;
-                if (i < 4) {
-                    dmv_x = dmv_y = 0;
-                    s->mb_intra   = 0;
-                    mb_has_coeffs = 0;
-                    if (val) {
-                        GET_MVDATA(dmv_x, dmv_y);
-                    }
-                    vc1_pred_mv(v, i, dmv_x, dmv_y, 0, v->range_x, v->range_y, v->mb_type[0], 0, 0);
-                    if (!s->mb_intra)
-                        vc1_mc_4mv_luma(v, i, 0, 0);
-                    intra_count += s->mb_intra;
-                    is_intra[i]  = s->mb_intra;
-                    is_coded[i]  = mb_has_coeffs;
-                }
-                if (i & 4) {
-                    is_intra[i] = (intra_count >= 3);
-                    is_coded[i] = val;
-                }
-                if (i == 4)
-                    vc1_mc_4mv_chroma(v, 0);
-                v->mb_type[0][s->block_index[i]] = is_intra[i];
-                if (!coded_inter)
-                    coded_inter = !is_intra[i] && is_coded[i];
-            }
-            // if there are no coded blocks then don't do anything more
-            dst_idx = 0;
-            if (!intra_count && !coded_inter)
-                goto end;
-            GET_MQUANT();
-            s->current_picture.qscale_table[mb_pos] = mquant;
-            /* test if block is intra and has pred */
-            {
-                int intrapred = 0;
-                for (i = 0; i < 6; i++)
-                    if (is_intra[i]) {
-                        if (((!s->first_slice_line || (i == 2 || i == 3)) && v->mb_type[0][s->block_index[i] - s->block_wrap[i]])
-                            || ((s->mb_x || (i == 1 || i == 3)) && v->mb_type[0][s->block_index[i] - 1])) {
-                            intrapred = 1;
-                            break;
-                        }
-                    }
-                if (intrapred)
-                    s->ac_pred = get_bits1(gb);
-                else
-                    s->ac_pred = 0;
-            }
-            if (!v->ttmbf && coded_inter)
-                ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);
-            for (i = 0; i < 6; i++) {
-                dst_idx    += i >> 2;
-                off         = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);
-                s->mb_intra = is_intra[i];
-                if (is_intra[i]) {
-                    /* check if prediction blocks A and C are available */
-                    v->a_avail = v->c_avail = 0;
-                    if (i == 2 || i == 3 || !s->first_slice_line)
-                        v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];
-                    if (i == 1 || i == 3 || s->mb_x)
-                        v->c_avail = v->mb_type[0][s->block_index[i] - 1];
-
-                    vc1_decode_intra_block(v, s->block[i], i, is_coded[i], mquant,
-                                           (i & 4) ? v->codingset2 : v->codingset);
-                    if ((i>3) && (s->flags & CODEC_FLAG_GRAY))
-                        continue;
-                    v->vc1dsp.vc1_inv_trans_8x8(s->block[i]);
-                    if (v->rangeredfrm)
-                        for (j = 0; j < 64; j++)
-                            s->block[i][j] <<= 1;
-                    s->idsp.put_signed_pixels_clamped(s->block[i],
-                                                      s->dest[dst_idx] + off,
-                                                      (i & 4) ? s->uvlinesize
-                                                              : s->linesize);
-                    if (v->pq >= 9 && v->overlap) {
-                        if (v->c_avail)
-                            v->vc1dsp.vc1_h_overlap(s->dest[dst_idx] + off, i & 4 ? s->uvlinesize : s->linesize);
-                        if (v->a_avail)
-                            v->vc1dsp.vc1_v_overlap(s->dest[dst_idx] + off, i & 4 ? s->uvlinesize : s->linesize);
-                    }
-                    block_cbp   |= 0xF << (i << 2);
-                    block_intra |= 1 << i;
-                } else if (is_coded[i]) {
-                    pat = vc1_decode_p_block(v, s->block[i], i, mquant, ttmb,
-                                             first_block, s->dest[dst_idx] + off,
-                                             (i & 4) ? s->uvlinesize : s->linesize,
-                                             (i & 4) && (s->flags & CODEC_FLAG_GRAY),
-                                             &block_tt);
-                    block_cbp |= pat << (i << 2);
-                    if (!v->ttmbf && ttmb < 8)
-                        ttmb = -1;
-                    first_block = 0;
-                }
-            }
-        } else { // skipped MB
-            s->mb_intra                               = 0;
-            s->current_picture.qscale_table[mb_pos] = 0;
-            for (i = 0; i < 6; i++) {
-                v->mb_type[0][s->block_index[i]] = 0;
-                s->dc_val[0][s->block_index[i]]  = 0;
-            }
-            for (i = 0; i < 4; i++) {
-                vc1_pred_mv(v, i, 0, 0, 0, v->range_x, v->range_y, v->mb_type[0], 0, 0);
-                vc1_mc_4mv_luma(v, i, 0, 0);
-            }
-            vc1_mc_4mv_chroma(v, 0);
-            s->current_picture.qscale_table[mb_pos] = 0;
-        }
-    }
-end:
-    v->cbp[s->mb_x]      = block_cbp;
-    v->ttblk[s->mb_x]    = block_tt;
-    v->is_intra[s->mb_x] = block_intra;
-
-    return 0;
-}
-
-/* Decode one macroblock in an interlaced frame p picture */
-
-static int vc1_decode_p_mb_intfr(VC1Context *v)
-{
-    MpegEncContext *s = &v->s;
-    GetBitContext *gb = &s->gb;
-    int i;
-    int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
-    int cbp = 0; /* cbp decoding stuff */
-    int mqdiff, mquant; /* MB quantization */
-    int ttmb = v->ttfrm; /* MB Transform type */
-
-    int mb_has_coeffs = 1; /* last_flag */
-    int dmv_x, dmv_y; /* Differential MV components */
-    int val; /* temp value */
-    int first_block = 1;
-    int dst_idx, off;
-    int skipped, fourmv = 0, twomv = 0;
-    int block_cbp = 0, pat, block_tt = 0;
-    int idx_mbmode = 0, mvbp;
-    int stride_y, fieldtx;
-
-    mquant = v->pq; /* Loosy initialization */
-
-    if (v->skip_is_raw)
-        skipped = get_bits1(gb);
-    else
-        skipped = v->s.mbskip_table[mb_pos];
-    if (!skipped) {
-        if (v->fourmvswitch)
-            idx_mbmode = get_vlc2(gb, v->mbmode_vlc->table, VC1_INTFR_4MV_MBMODE_VLC_BITS, 2); // try getting this done
-        else
-            idx_mbmode = get_vlc2(gb, v->mbmode_vlc->table, VC1_INTFR_NON4MV_MBMODE_VLC_BITS, 2); // in a single line
-        switch (ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][0]) {
-        /* store the motion vector type in a flag (useful later) */
-        case MV_PMODE_INTFR_4MV:
-            fourmv = 1;
-            v->blk_mv_type[s->block_index[0]] = 0;
-            v->blk_mv_type[s->block_index[1]] = 0;
-            v->blk_mv_type[s->block_index[2]] = 0;
-            v->blk_mv_type[s->block_index[3]] = 0;
-            break;
-        case MV_PMODE_INTFR_4MV_FIELD:
-            fourmv = 1;
-            v->blk_mv_type[s->block_index[0]] = 1;
-            v->blk_mv_type[s->block_index[1]] = 1;
-            v->blk_mv_type[s->block_index[2]] = 1;
-            v->blk_mv_type[s->block_index[3]] = 1;
-            break;
-        case MV_PMODE_INTFR_2MV_FIELD:
-            twomv = 1;
-            v->blk_mv_type[s->block_index[0]] = 1;
-            v->blk_mv_type[s->block_index[1]] = 1;
-            v->blk_mv_type[s->block_index[2]] = 1;
-            v->blk_mv_type[s->block_index[3]] = 1;
-            break;
-        case MV_PMODE_INTFR_1MV:
-            v->blk_mv_type[s->block_index[0]] = 0;
-            v->blk_mv_type[s->block_index[1]] = 0;
-            v->blk_mv_type[s->block_index[2]] = 0;
-            v->blk_mv_type[s->block_index[3]] = 0;
-            break;
-        }
-        if (ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][0] == MV_PMODE_INTFR_INTRA) { // intra MB
-            for (i = 0; i < 4; i++) {
-                s->current_picture.motion_val[1][s->block_index[i]][0] = 0;
-                s->current_picture.motion_val[1][s->block_index[i]][1] = 0;
-            }
-            s->current_picture.mb_type[mb_pos]                     = MB_TYPE_INTRA;
-            s->mb_intra = v->is_intra[s->mb_x] = 1;
-            for (i = 0; i < 6; i++)
-                v->mb_type[0][s->block_index[i]] = 1;
-            fieldtx = v->fieldtx_plane[mb_pos] = get_bits1(gb);
-            mb_has_coeffs = get_bits1(gb);
-            if (mb_has_coeffs)
-                cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
-            v->s.ac_pred = v->acpred_plane[mb_pos] = get_bits1(gb);
-            GET_MQUANT();
-            s->current_picture.qscale_table[mb_pos] = mquant;
-            /* Set DC scale - y and c use the same (not sure if necessary here) */
-            s->y_dc_scale = s->y_dc_scale_table[mquant];
-            s->c_dc_scale = s->c_dc_scale_table[mquant];
-            dst_idx = 0;
-            for (i = 0; i < 6; i++) {
-                s->dc_val[0][s->block_index[i]] = 0;
-                dst_idx += i >> 2;
-                val = ((cbp >> (5 - i)) & 1);
-                v->mb_type[0][s->block_index[i]] = s->mb_intra;
-                v->a_avail = v->c_avail = 0;
-                if (i == 2 || i == 3 || !s->first_slice_line)
-                    v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];
-                if (i == 1 || i == 3 || s->mb_x)
-                    v->c_avail = v->mb_type[0][s->block_index[i] - 1];
-
-                vc1_decode_intra_block(v, s->block[i], i, val, mquant,
-                                       (i & 4) ? v->codingset2 : v->codingset);
-                if ((i>3) && (s->flags & CODEC_FLAG_GRAY)) continue;
-                v->vc1dsp.vc1_inv_trans_8x8(s->block[i]);
-                if (i < 4) {
-                    stride_y = s->linesize << fieldtx;
-                    off = (fieldtx) ? ((i & 1) * 8) + ((i & 2) >> 1) * s->linesize : (i & 1) * 8 + 4 * (i & 2) * s->linesize;
-                } else {
-                    stride_y = s->uvlinesize;
-                    off = 0;
-                }
-                s->idsp.put_signed_pixels_clamped(s->block[i],
-                                                  s->dest[dst_idx] + off,
-                                                  stride_y);
-                //TODO: loop filter
-            }
-
-        } else { // inter MB
-            mb_has_coeffs = ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][3];
-            if (mb_has_coeffs)
-                cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
-            if (ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][0] == MV_PMODE_INTFR_2MV_FIELD) {
-                v->twomvbp = get_vlc2(gb, v->twomvbp_vlc->table, VC1_2MV_BLOCK_PATTERN_VLC_BITS, 1);
-            } else {
-                if ((ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][0] == MV_PMODE_INTFR_4MV)
-                    || (ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][0] == MV_PMODE_INTFR_4MV_FIELD)) {
-                    v->fourmvbp = get_vlc2(gb, v->fourmvbp_vlc->table, VC1_4MV_BLOCK_PATTERN_VLC_BITS, 1);
-                }
-            }
-            s->mb_intra = v->is_intra[s->mb_x] = 0;
-            for (i = 0; i < 6; i++)
-                v->mb_type[0][s->block_index[i]] = 0;
-            fieldtx = v->fieldtx_plane[mb_pos] = ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][1];
-            /* for all motion vector read MVDATA and motion compensate each block */
-            dst_idx = 0;
-            if (fourmv) {
-                mvbp = v->fourmvbp;
-                for (i = 0; i < 6; i++) {
-                    if (i < 4) {
-                        dmv_x = dmv_y = 0;
-                        val   = ((mvbp >> (3 - i)) & 1);
-                        if (val) {
-                            get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
-                        }
-                        vc1_pred_mv_intfr(v, i, dmv_x, dmv_y, 0, v->range_x, v->range_y, v->mb_type[0], 0);
-                        vc1_mc_4mv_luma(v, i, 0, 0);
-                    } else if (i == 4) {
-                        vc1_mc_4mv_chroma4(v, 0, 0, 0);
-                    }
-                }
-            } else if (twomv) {
-                mvbp  = v->twomvbp;
-                dmv_x = dmv_y = 0;
-                if (mvbp & 2) {
-                    get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
-                }
-                vc1_pred_mv_intfr(v, 0, dmv_x, dmv_y, 2, v->range_x, v->range_y, v->mb_type[0], 0);
-                vc1_mc_4mv_luma(v, 0, 0, 0);
-                vc1_mc_4mv_luma(v, 1, 0, 0);
-                dmv_x = dmv_y = 0;
-                if (mvbp & 1) {
-                    get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
-                }
-                vc1_pred_mv_intfr(v, 2, dmv_x, dmv_y, 2, v->range_x, v->range_y, v->mb_type[0], 0);
-                vc1_mc_4mv_luma(v, 2, 0, 0);
-                vc1_mc_4mv_luma(v, 3, 0, 0);
-                vc1_mc_4mv_chroma4(v, 0, 0, 0);
-            } else {
-                mvbp = ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][2];
-                dmv_x = dmv_y = 0;
-                if (mvbp) {
-                    get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
-                }
-                vc1_pred_mv_intfr(v, 0, dmv_x, dmv_y, 1, v->range_x, v->range_y, v->mb_type[0], 0);
-                vc1_mc_1mv(v, 0);
-            }
-            if (cbp)
-                GET_MQUANT();  // p. 227
-            s->current_picture.qscale_table[mb_pos] = mquant;
-            if (!v->ttmbf && cbp)
-                ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);
-            for (i = 0; i < 6; i++) {
-                s->dc_val[0][s->block_index[i]] = 0;
-                dst_idx += i >> 2;
-                val = ((cbp >> (5 - i)) & 1);
-                if (!fieldtx)
-                    off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);
-                else
-                    off = (i & 4) ? 0 : ((i & 1) * 8 + ((i > 1) * s->linesize));
-                if (val) {
-                    pat = vc1_decode_p_block(v, s->block[i], i, mquant, ttmb,
-                                             first_block, s->dest[dst_idx] + off,
-                                             (i & 4) ? s->uvlinesize : (s->linesize << fieldtx),
-                                             (i & 4) && (s->flags & CODEC_FLAG_GRAY), &block_tt);
-                    block_cbp |= pat << (i << 2);
-                    if (!v->ttmbf && ttmb < 8)
-                        ttmb = -1;
-                    first_block = 0;
-                }
-            }
-        }
-    } else { // skipped
-        s->mb_intra = v->is_intra[s->mb_x] = 0;
-        for (i = 0; i < 6; i++) {
-            v->mb_type[0][s->block_index[i]] = 0;
-            s->dc_val[0][s->block_index[i]] = 0;
-        }
-        s->current_picture.mb_type[mb_pos]      = MB_TYPE_SKIP;
-        s->current_picture.qscale_table[mb_pos] = 0;
-        v->blk_mv_type[s->block_index[0]] = 0;
-        v->blk_mv_type[s->block_index[1]] = 0;
-        v->blk_mv_type[s->block_index[2]] = 0;
-        v->blk_mv_type[s->block_index[3]] = 0;
-        vc1_pred_mv_intfr(v, 0, 0, 0, 1, v->range_x, v->range_y, v->mb_type[0], 0);
-        vc1_mc_1mv(v, 0);
-    }
-    if (s->mb_x == s->mb_width - 1)
-        memmove(v->is_intra_base, v->is_intra, sizeof(v->is_intra_base[0])*s->mb_stride);
-    return 0;
-}
-
-static int vc1_decode_p_mb_intfi(VC1Context *v)
-{
-    MpegEncContext *s = &v->s;
-    GetBitContext *gb = &s->gb;
-    int i;
-    int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
-    int cbp = 0; /* cbp decoding stuff */
-    int mqdiff, mquant; /* MB quantization */
-    int ttmb = v->ttfrm; /* MB Transform type */
-
-    int mb_has_coeffs = 1; /* last_flag */
-    int dmv_x, dmv_y; /* Differential MV components */
-    int val; /* temp values */
-    int first_block = 1;
-    int dst_idx, off;
-    int pred_flag;
-    int block_cbp = 0, pat, block_tt = 0;
-    int idx_mbmode = 0;
-
-    mquant = v->pq; /* Loosy initialization */
-
-    idx_mbmode = get_vlc2(gb, v->mbmode_vlc->table, VC1_IF_MBMODE_VLC_BITS, 2);
-    if (idx_mbmode <= 1) { // intra MB
-        s->mb_intra = v->is_intra[s->mb_x] = 1;
-        s->current_picture.motion_val[1][s->block_index[0] + v->blocks_off][0] = 0;
-        s->current_picture.motion_val[1][s->block_index[0] + v->blocks_off][1] = 0;
-        s->current_picture.mb_type[mb_pos + v->mb_off] = MB_TYPE_INTRA;
-        GET_MQUANT();
-        s->current_picture.qscale_table[mb_pos] = mquant;
-        /* Set DC scale - y and c use the same (not sure if necessary here) */
-        s->y_dc_scale = s->y_dc_scale_table[mquant];
-        s->c_dc_scale = s->c_dc_scale_table[mquant];
-        v->s.ac_pred  = v->acpred_plane[mb_pos] = get_bits1(gb);
-        mb_has_coeffs = idx_mbmode & 1;
-        if (mb_has_coeffs)
-            cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_ICBPCY_VLC_BITS, 2);
-        dst_idx = 0;
-        for (i = 0; i < 6; i++) {
-            s->dc_val[0][s->block_index[i]]  = 0;
-            v->mb_type[0][s->block_index[i]] = 1;
-            dst_idx += i >> 2;
-            val = ((cbp >> (5 - i)) & 1);
-            v->a_avail = v->c_avail = 0;
-            if (i == 2 || i == 3 || !s->first_slice_line)
-                v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];
-            if (i == 1 || i == 3 || s->mb_x)
-                v->c_avail = v->mb_type[0][s->block_index[i] - 1];
-
-            vc1_decode_intra_block(v, s->block[i], i, val, mquant,
-                                   (i & 4) ? v->codingset2 : v->codingset);
-            if ((i>3) && (s->flags & CODEC_FLAG_GRAY))
-                continue;
-            v->vc1dsp.vc1_inv_trans_8x8(s->block[i]);
-            off  = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);
-            s->idsp.put_signed_pixels_clamped(s->block[i],
-                                              s->dest[dst_idx] + off,
-                                              (i & 4) ? s->uvlinesize
-                                                      : s->linesize);
-            // TODO: loop filter
-        }
-    } else {
-        s->mb_intra = v->is_intra[s->mb_x] = 0;
-        s->current_picture.mb_type[mb_pos + v->mb_off] = MB_TYPE_16x16;
-        for (i = 0; i < 6; i++) v->mb_type[0][s->block_index[i]] = 0;
-        if (idx_mbmode <= 5) { // 1-MV
-            dmv_x = dmv_y = pred_flag = 0;
-            if (idx_mbmode & 1) {
-                get_mvdata_interlaced(v, &dmv_x, &dmv_y, &pred_flag);
-            }
-            vc1_pred_mv(v, 0, dmv_x, dmv_y, 1, v->range_x, v->range_y, v->mb_type[0], pred_flag, 0);
-            vc1_mc_1mv(v, 0);
-            mb_has_coeffs = !(idx_mbmode & 2);
-        } else { // 4-MV
-            v->fourmvbp = get_vlc2(gb, v->fourmvbp_vlc->table, VC1_4MV_BLOCK_PATTERN_VLC_BITS, 1);
-            for (i = 0; i < 6; i++) {
-                if (i < 4) {
-                    dmv_x = dmv_y = pred_flag = 0;
-                    val   = ((v->fourmvbp >> (3 - i)) & 1);
-                    if (val) {
-                        get_mvdata_interlaced(v, &dmv_x, &dmv_y, &pred_flag);
-                    }
-                    vc1_pred_mv(v, i, dmv_x, dmv_y, 0, v->range_x, v->range_y, v->mb_type[0], pred_flag, 0);
-                    vc1_mc_4mv_luma(v, i, 0, 0);
-                } else if (i == 4)
-                    vc1_mc_4mv_chroma(v, 0);
-            }
-            mb_has_coeffs = idx_mbmode & 1;
-        }
-        if (mb_has_coeffs)
-            cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
-        if (cbp) {
-            GET_MQUANT();
-        }
-        s->current_picture.qscale_table[mb_pos] = mquant;
-        if (!v->ttmbf && cbp) {
-            ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);
-        }
-        dst_idx = 0;
-        for (i = 0; i < 6; i++) {
-            s->dc_val[0][s->block_index[i]] = 0;
-            dst_idx += i >> 2;
-            val = ((cbp >> (5 - i)) & 1);
-            off = (i & 4) ? 0 : (i & 1) * 8 + (i & 2) * 4 * s->linesize;
-            if (val) {
-                pat = vc1_decode_p_block(v, s->block[i], i, mquant, ttmb,
-                                         first_block, s->dest[dst_idx] + off,
-                                         (i & 4) ? s->uvlinesize : s->linesize,
-                                         (i & 4) && (s->flags & CODEC_FLAG_GRAY),
-                                         &block_tt);
-                block_cbp |= pat << (i << 2);
-                if (!v->ttmbf && ttmb < 8) ttmb = -1;
-                first_block = 0;
-            }
-        }
-    }
-    if (s->mb_x == s->mb_width - 1)
-        memmove(v->is_intra_base, v->is_intra, sizeof(v->is_intra_base[0]) * s->mb_stride);
-    return 0;
-}
-
-/** Decode one B-frame MB (in Main profile)
- */
-static void vc1_decode_b_mb(VC1Context *v)
-{
-    MpegEncContext *s = &v->s;
-    GetBitContext *gb = &s->gb;
-    int i, j;
-    int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
-    int cbp = 0; /* cbp decoding stuff */
-    int mqdiff, mquant; /* MB quantization */
-    int ttmb = v->ttfrm; /* MB Transform type */
-    int mb_has_coeffs = 0; /* last_flag */
-    int index, index1; /* LUT indexes */
-    int val, sign; /* temp values */
-    int first_block = 1;
-    int dst_idx, off;
-    int skipped, direct;
-    int dmv_x[2], dmv_y[2];
-    int bmvtype = BMV_TYPE_BACKWARD;
-
-    mquant      = v->pq; /* lossy initialization */
-    s->mb_intra = 0;
-
-    if (v->dmb_is_raw)
-        direct = get_bits1(gb);
-    else
-        direct = v->direct_mb_plane[mb_pos];
-    if (v->skip_is_raw)
-        skipped = get_bits1(gb);
-    else
-        skipped = v->s.mbskip_table[mb_pos];
-
-    dmv_x[0] = dmv_x[1] = dmv_y[0] = dmv_y[1] = 0;
-    for (i = 0; i < 6; i++) {
-        v->mb_type[0][s->block_index[i]] = 0;
-        s->dc_val[0][s->block_index[i]]  = 0;
-    }
-    s->current_picture.qscale_table[mb_pos] = 0;
-
-    if (!direct) {
-        if (!skipped) {
-            GET_MVDATA(dmv_x[0], dmv_y[0]);
-            dmv_x[1] = dmv_x[0];
-            dmv_y[1] = dmv_y[0];
-        }
-        if (skipped || !s->mb_intra) {
-            bmvtype = decode012(gb);
-            switch (bmvtype) {
-            case 0:
-                bmvtype = (v->bfraction >= (B_FRACTION_DEN/2)) ? BMV_TYPE_BACKWARD : BMV_TYPE_FORWARD;
-                break;
-            case 1:
-                bmvtype = (v->bfraction >= (B_FRACTION_DEN/2)) ? BMV_TYPE_FORWARD : BMV_TYPE_BACKWARD;
-                break;
-            case 2:
-                bmvtype  = BMV_TYPE_INTERPOLATED;
-                dmv_x[0] = dmv_y[0] = 0;
-            }
-        }
-    }
-    for (i = 0; i < 6; i++)
-        v->mb_type[0][s->block_index[i]] = s->mb_intra;
-
-    if (skipped) {
-        if (direct)
-            bmvtype = BMV_TYPE_INTERPOLATED;
-        vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);
-        vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);
-        return;
-    }
-    if (direct) {
-        cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
-        GET_MQUANT();
-        s->mb_intra = 0;
-        s->current_picture.qscale_table[mb_pos] = mquant;
-        if (!v->ttmbf)
-            ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);
-        dmv_x[0] = dmv_y[0] = dmv_x[1] = dmv_y[1] = 0;
-        vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);
-        vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);
-    } else {
-        if (!mb_has_coeffs && !s->mb_intra) {
-            /* no coded blocks - effectively skipped */
-            vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);
-            vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);
-            return;
-        }
-        if (s->mb_intra && !mb_has_coeffs) {
-            GET_MQUANT();
-            s->current_picture.qscale_table[mb_pos] = mquant;
-            s->ac_pred = get_bits1(gb);
-            cbp = 0;
-            vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);
-        } else {
-            if (bmvtype == BMV_TYPE_INTERPOLATED) {
-                GET_MVDATA(dmv_x[0], dmv_y[0]);
-                if (!mb_has_coeffs) {
-                    /* interpolated skipped block */
-                    vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);
-                    vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);
-                    return;
-                }
-            }
-            vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);
-            if (!s->mb_intra) {
-                vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);
-            }
-            if (s->mb_intra)
-                s->ac_pred = get_bits1(gb);
-            cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
-            GET_MQUANT();
-            s->current_picture.qscale_table[mb_pos] = mquant;
-            if (!v->ttmbf && !s->mb_intra && mb_has_coeffs)
-                ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);
-        }
-    }
-    dst_idx = 0;
-    for (i = 0; i < 6; i++) {
-        s->dc_val[0][s->block_index[i]] = 0;
-        dst_idx += i >> 2;
-        val = ((cbp >> (5 - i)) & 1);
-        off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);
-        v->mb_type[0][s->block_index[i]] = s->mb_intra;
-        if (s->mb_intra) {
-            /* check if prediction blocks A and C are available */
-            v->a_avail = v->c_avail = 0;
-            if (i == 2 || i == 3 || !s->first_slice_line)
-                v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];
-            if (i == 1 || i == 3 || s->mb_x)
-                v->c_avail = v->mb_type[0][s->block_index[i] - 1];
-
-            vc1_decode_intra_block(v, s->block[i], i, val, mquant,
-                                   (i & 4) ? v->codingset2 : v->codingset);
-            if ((i>3) && (s->flags & CODEC_FLAG_GRAY))
-                continue;
-            v->vc1dsp.vc1_inv_trans_8x8(s->block[i]);
-            if (v->rangeredfrm)
-                for (j = 0; j < 64; j++)
-                    s->block[i][j] <<= 1;
-            s->idsp.put_signed_pixels_clamped(s->block[i],
-                                              s->dest[dst_idx] + off,
-                                              i & 4 ? s->uvlinesize
-                                                    : s->linesize);
-        } else if (val) {
-            vc1_decode_p_block(v, s->block[i], i, mquant, ttmb,
-                               first_block, s->dest[dst_idx] + off,
-                               (i & 4) ? s->uvlinesize : s->linesize,
-                               (i & 4) && (s->flags & CODEC_FLAG_GRAY), NULL);
-            if (!v->ttmbf && ttmb < 8)
-                ttmb = -1;
-            first_block = 0;
-        }
-    }
-}
-
-/** Decode one B-frame MB (in interlaced field B picture)
- */
-static void vc1_decode_b_mb_intfi(VC1Context *v)
-{
-    MpegEncContext *s = &v->s;
-    GetBitContext *gb = &s->gb;
-    int i, j;
-    int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
-    int cbp = 0; /* cbp decoding stuff */
-    int mqdiff, mquant; /* MB quantization */
-    int ttmb = v->ttfrm; /* MB Transform type */
-    int mb_has_coeffs = 0; /* last_flag */
-    int val; /* temp value */
-    int first_block = 1;
-    int dst_idx, off;
-    int fwd;
-    int dmv_x[2], dmv_y[2], pred_flag[2];
-    int bmvtype = BMV_TYPE_BACKWARD;
-    int idx_mbmode, interpmvp;
-
-    mquant      = v->pq; /* Loosy initialization */
-    s->mb_intra = 0;
-
-    idx_mbmode = get_vlc2(gb, v->mbmode_vlc->table, VC1_IF_MBMODE_VLC_BITS, 2);
-    if (idx_mbmode <= 1) { // intra MB
-        s->mb_intra = v->is_intra[s->mb_x] = 1;
-        s->current_picture.motion_val[1][s->block_index[0]][0] = 0;
-        s->current_picture.motion_val[1][s->block_index[0]][1] = 0;
-        s->current_picture.mb_type[mb_pos + v->mb_off]         = MB_TYPE_INTRA;
-        GET_MQUANT();
-        s->current_picture.qscale_table[mb_pos] = mquant;
-        /* Set DC scale - y and c use the same (not sure if necessary here) */
-        s->y_dc_scale = s->y_dc_scale_table[mquant];
-        s->c_dc_scale = s->c_dc_scale_table[mquant];
-        v->s.ac_pred  = v->acpred_plane[mb_pos] = get_bits1(gb);
-        mb_has_coeffs = idx_mbmode & 1;
-        if (mb_has_coeffs)
-            cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_ICBPCY_VLC_BITS, 2);
-        dst_idx = 0;
-        for (i = 0; i < 6; i++) {
-            s->dc_val[0][s->block_index[i]] = 0;
-            dst_idx += i >> 2;
-            val = ((cbp >> (5 - i)) & 1);
-            v->mb_type[0][s->block_index[i]] = s->mb_intra;
-            v->a_avail                       = v->c_avail = 0;
-            if (i == 2 || i == 3 || !s->first_slice_line)
-                v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];
-            if (i == 1 || i == 3 || s->mb_x)
-                v->c_avail = v->mb_type[0][s->block_index[i] - 1];
-
-            vc1_decode_intra_block(v, s->block[i], i, val, mquant,
-                                   (i & 4) ? v->codingset2 : v->codingset);
-            if ((i>3) && (s->flags & CODEC_FLAG_GRAY))
-                continue;
-            v->vc1dsp.vc1_inv_trans_8x8(s->block[i]);
-            if (v->rangeredfrm)
-                for (j = 0; j < 64; j++)
-                    s->block[i][j] <<= 1;
-            off  = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);
-            s->idsp.put_signed_pixels_clamped(s->block[i],
-                                              s->dest[dst_idx] + off,
-                                              (i & 4) ? s->uvlinesize
-                                                      : s->linesize);
-            // TODO: yet to perform loop filter
-        }
-    } else {
-        s->mb_intra = v->is_intra[s->mb_x] = 0;
-        s->current_picture.mb_type[mb_pos + v->mb_off] = MB_TYPE_16x16;
-        for (i = 0; i < 6; i++) v->mb_type[0][s->block_index[i]] = 0;
-        if (v->fmb_is_raw)
-            fwd = v->forward_mb_plane[mb_pos] = get_bits1(gb);
-        else
-            fwd = v->forward_mb_plane[mb_pos];
-        if (idx_mbmode <= 5) { // 1-MV
-            dmv_x[0]     = dmv_x[1] = dmv_y[0] = dmv_y[1] = 0;
-            pred_flag[0] = pred_flag[1] = 0;
-            if (fwd)
-                bmvtype = BMV_TYPE_FORWARD;
-            else {
-                bmvtype = decode012(gb);
-                switch (bmvtype) {
-                case 0:
-                    bmvtype = BMV_TYPE_BACKWARD;
-                    break;
-                case 1:
-                    bmvtype = BMV_TYPE_DIRECT;
-                    break;
-                case 2:
-                    bmvtype   = BMV_TYPE_INTERPOLATED;
-                    interpmvp = get_bits1(gb);
-                }
-            }
-            v->bmvtype = bmvtype;
-            if (bmvtype != BMV_TYPE_DIRECT && idx_mbmode & 1) {
-                get_mvdata_interlaced(v, &dmv_x[bmvtype == BMV_TYPE_BACKWARD], &dmv_y[bmvtype == BMV_TYPE_BACKWARD], &pred_flag[bmvtype == BMV_TYPE_BACKWARD]);
-            }
-            if (bmvtype == BMV_TYPE_INTERPOLATED && interpmvp) {
-                get_mvdata_interlaced(v, &dmv_x[1], &dmv_y[1], &pred_flag[1]);
-            }
-            if (bmvtype == BMV_TYPE_DIRECT) {
-                dmv_x[0] = dmv_y[0] = pred_flag[0] = 0;
-                dmv_x[1] = dmv_y[1] = pred_flag[0] = 0;
-            }
-            vc1_pred_b_mv_intfi(v, 0, dmv_x, dmv_y, 1, pred_flag);
-            vc1_b_mc(v, dmv_x, dmv_y, (bmvtype == BMV_TYPE_DIRECT), bmvtype);
-            mb_has_coeffs = !(idx_mbmode & 2);
-        } else { // 4-MV
-            if (fwd)
-                bmvtype = BMV_TYPE_FORWARD;
-            v->bmvtype  = bmvtype;
-            v->fourmvbp = get_vlc2(gb, v->fourmvbp_vlc->table, VC1_4MV_BLOCK_PATTERN_VLC_BITS, 1);
-            for (i = 0; i < 6; i++) {
-                if (i < 4) {
-                    dmv_x[0] = dmv_y[0] = pred_flag[0] = 0;
-                    dmv_x[1] = dmv_y[1] = pred_flag[1] = 0;
-                    val = ((v->fourmvbp >> (3 - i)) & 1);
-                    if (val) {
-                        get_mvdata_interlaced(v, &dmv_x[bmvtype == BMV_TYPE_BACKWARD],
-                                                 &dmv_y[bmvtype == BMV_TYPE_BACKWARD],
-                                             &pred_flag[bmvtype == BMV_TYPE_BACKWARD]);
-                    }
-                    vc1_pred_b_mv_intfi(v, i, dmv_x, dmv_y, 0, pred_flag);
-                    vc1_mc_4mv_luma(v, i, bmvtype == BMV_TYPE_BACKWARD, 0);
-                } else if (i == 4)
-                    vc1_mc_4mv_chroma(v, bmvtype == BMV_TYPE_BACKWARD);
-            }
-            mb_has_coeffs = idx_mbmode & 1;
-        }
-        if (mb_has_coeffs)
-            cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
-        if (cbp) {
-            GET_MQUANT();
-        }
-        s->current_picture.qscale_table[mb_pos] = mquant;
-        if (!v->ttmbf && cbp) {
-            ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);
-        }
-        dst_idx = 0;
-        for (i = 0; i < 6; i++) {
-            s->dc_val[0][s->block_index[i]] = 0;
-            dst_idx += i >> 2;
-            val = ((cbp >> (5 - i)) & 1);
-            off = (i & 4) ? 0 : (i & 1) * 8 + (i & 2) * 4 * s->linesize;
-            if (val) {
-                vc1_decode_p_block(v, s->block[i], i, mquant, ttmb,
-                                   first_block, s->dest[dst_idx] + off,
-                                   (i & 4) ? s->uvlinesize : s->linesize,
-                                   (i & 4) && (s->flags & CODEC_FLAG_GRAY), NULL);
-                if (!v->ttmbf && ttmb < 8)
-                    ttmb = -1;
-                first_block = 0;
-            }
-        }
-    }
-}
-
-/** Decode one B-frame MB (in interlaced frame B picture)
- */
-static int vc1_decode_b_mb_intfr(VC1Context *v)
-{
-    MpegEncContext *s = &v->s;
-    GetBitContext *gb = &s->gb;
-    int i, j;
-    int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
-    int cbp = 0; /* cbp decoding stuff */
-    int mqdiff, mquant; /* MB quantization */
-    int ttmb = v->ttfrm; /* MB Transform type */
-    int mvsw = 0; /* motion vector switch */
-    int mb_has_coeffs = 1; /* last_flag */
-    int dmv_x, dmv_y; /* Differential MV components */
-    int val; /* temp value */
-    int first_block = 1;
-    int dst_idx, off;
-    int skipped, direct, twomv = 0;
-    int block_cbp = 0, pat, block_tt = 0;
-    int idx_mbmode = 0, mvbp;
-    int stride_y, fieldtx;
-    int bmvtype = BMV_TYPE_BACKWARD;
-    int dir, dir2;
-
-    mquant = v->pq; /* Lossy initialization */
-    s->mb_intra = 0;
-    if (v->skip_is_raw)
-        skipped = get_bits1(gb);
-    else
-        skipped = v->s.mbskip_table[mb_pos];
-
-    if (!skipped) {
-        idx_mbmode = get_vlc2(gb, v->mbmode_vlc->table, VC1_INTFR_NON4MV_MBMODE_VLC_BITS, 2);
-        if (ff_vc1_mbmode_intfrp[0][idx_mbmode][0] == MV_PMODE_INTFR_2MV_FIELD) {
-            twomv = 1;
-            v->blk_mv_type[s->block_index[0]] = 1;
-            v->blk_mv_type[s->block_index[1]] = 1;
-            v->blk_mv_type[s->block_index[2]] = 1;
-            v->blk_mv_type[s->block_index[3]] = 1;
-        } else {
-            v->blk_mv_type[s->block_index[0]] = 0;
-            v->blk_mv_type[s->block_index[1]] = 0;
-            v->blk_mv_type[s->block_index[2]] = 0;
-            v->blk_mv_type[s->block_index[3]] = 0;
-        }
-    }
-
-    if (v->dmb_is_raw)
-        direct = get_bits1(gb);
-    else
-        direct = v->direct_mb_plane[mb_pos];
-
-    if (direct) {
-        s->mv[0][0][0] = s->current_picture.motion_val[0][s->block_index[0]][0] = scale_mv(s->next_picture.motion_val[1][s->block_index[0]][0], v->bfraction, 0, s->quarter_sample);
-        s->mv[0][0][1] = s->current_picture.motion_val[0][s->block_index[0]][1] = scale_mv(s->next_picture.motion_val[1][s->block_index[0]][1], v->bfraction, 0, s->quarter_sample);
-        s->mv[1][0][0] = s->current_picture.motion_val[1][s->block_index[0]][0] = scale_mv(s->next_picture.motion_val[1][s->block_index[0]][0], v->bfraction, 1, s->quarter_sample);
-        s->mv[1][0][1] = s->current_picture.motion_val[1][s->block_index[0]][1] = scale_mv(s->next_picture.motion_val[1][s->block_index[0]][1], v->bfraction, 1, s->quarter_sample);
-
-        if (twomv) {
-            s->mv[0][2][0] = s->current_picture.motion_val[0][s->block_index[2]][0] = scale_mv(s->next_picture.motion_val[1][s->block_index[2]][0], v->bfraction, 0, s->quarter_sample);
-            s->mv[0][2][1] = s->current_picture.motion_val[0][s->block_index[2]][1] = scale_mv(s->next_picture.motion_val[1][s->block_index[2]][1], v->bfraction, 0, s->quarter_sample);
-            s->mv[1][2][0] = s->current_picture.motion_val[1][s->block_index[2]][0] = scale_mv(s->next_picture.motion_val[1][s->block_index[2]][0], v->bfraction, 1, s->quarter_sample);
-            s->mv[1][2][1] = s->current_picture.motion_val[1][s->block_index[2]][1] = scale_mv(s->next_picture.motion_val[1][s->block_index[2]][1], v->bfraction, 1, s->quarter_sample);
-
-            for (i = 1; i < 4; i += 2) {
-                s->mv[0][i][0] = s->current_picture.motion_val[0][s->block_index[i]][0] = s->mv[0][i-1][0];
-                s->mv[0][i][1] = s->current_picture.motion_val[0][s->block_index[i]][1] = s->mv[0][i-1][1];
-                s->mv[1][i][0] = s->current_picture.motion_val[1][s->block_index[i]][0] = s->mv[1][i-1][0];
-                s->mv[1][i][1] = s->current_picture.motion_val[1][s->block_index[i]][1] = s->mv[1][i-1][1];
-            }
-        } else {
-            for (i = 1; i < 4; i++) {
-                s->mv[0][i][0] = s->current_picture.motion_val[0][s->block_index[i]][0] = s->mv[0][0][0];
-                s->mv[0][i][1] = s->current_picture.motion_val[0][s->block_index[i]][1] = s->mv[0][0][1];
-                s->mv[1][i][0] = s->current_picture.motion_val[1][s->block_index[i]][0] = s->mv[1][0][0];
-                s->mv[1][i][1] = s->current_picture.motion_val[1][s->block_index[i]][1] = s->mv[1][0][1];
-            }
-        }
-    }
-
-    if (ff_vc1_mbmode_intfrp[0][idx_mbmode][0] == MV_PMODE_INTFR_INTRA) { // intra MB
-        for (i = 0; i < 4; i++) {
-            s->mv[0][i][0] = s->current_picture.motion_val[0][s->block_index[i]][0] = 0;
-            s->mv[0][i][1] = s->current_picture.motion_val[0][s->block_index[i]][1] = 0;
-            s->mv[1][i][0] = s->current_picture.motion_val[1][s->block_index[i]][0] = 0;
-            s->mv[1][i][1] = s->current_picture.motion_val[1][s->block_index[i]][1] = 0;
-        }
-        s->current_picture.mb_type[mb_pos] = MB_TYPE_INTRA;
-        s->mb_intra = v->is_intra[s->mb_x] = 1;
-        for (i = 0; i < 6; i++)
-            v->mb_type[0][s->block_index[i]] = 1;
-        fieldtx = v->fieldtx_plane[mb_pos] = get_bits1(gb);
-        mb_has_coeffs = get_bits1(gb);
-        if (mb_has_coeffs)
-            cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
-        v->s.ac_pred = v->acpred_plane[mb_pos] = get_bits1(gb);
-        GET_MQUANT();
-        s->current_picture.qscale_table[mb_pos] = mquant;
-        /* Set DC scale - y and c use the same (not sure if necessary here) */
-        s->y_dc_scale = s->y_dc_scale_table[mquant];
-        s->c_dc_scale = s->c_dc_scale_table[mquant];
-        dst_idx = 0;
-        for (i = 0; i < 6; i++) {
-            s->dc_val[0][s->block_index[i]] = 0;
-            dst_idx += i >> 2;
-            val = ((cbp >> (5 - i)) & 1);
-            v->mb_type[0][s->block_index[i]] = s->mb_intra;
-            v->a_avail = v->c_avail = 0;
-            if (i == 2 || i == 3 || !s->first_slice_line)
-                v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];
-            if (i == 1 || i == 3 || s->mb_x)
-                v->c_avail = v->mb_type[0][s->block_index[i] - 1];
-
-            vc1_decode_intra_block(v, s->block[i], i, val, mquant,
-                                   (i & 4) ? v->codingset2 : v->codingset);
-            if (i > 3 && (s->flags & CODEC_FLAG_GRAY))
-                continue;
-            v->vc1dsp.vc1_inv_trans_8x8(s->block[i]);
-            if (i < 4) {
-                stride_y = s->linesize << fieldtx;
-                off = (fieldtx) ? ((i & 1) * 8) + ((i & 2) >> 1) * s->linesize : (i & 1) * 8 + 4 * (i & 2) * s->linesize;
-            } else {
-                stride_y = s->uvlinesize;
-                off = 0;
-            }
-            s->idsp.put_signed_pixels_clamped(s->block[i],
-                                              s->dest[dst_idx] + off,
-                                              stride_y);
-        }
-    } else {
-        s->mb_intra = v->is_intra[s->mb_x] = 0;
-        if (!direct) {
-            if (skipped || !s->mb_intra) {
-                bmvtype = decode012(gb);
-                switch (bmvtype) {
-                case 0:
-                    bmvtype = (v->bfraction >= (B_FRACTION_DEN/2)) ? BMV_TYPE_BACKWARD : BMV_TYPE_FORWARD;
-                    break;
-                case 1:
-                    bmvtype = (v->bfraction >= (B_FRACTION_DEN/2)) ? BMV_TYPE_FORWARD : BMV_TYPE_BACKWARD;
-                    break;
-                case 2:
-                    bmvtype  = BMV_TYPE_INTERPOLATED;
-                }
-            }
-
-            if (twomv && bmvtype != BMV_TYPE_INTERPOLATED)
-                mvsw = get_bits1(gb);
-        }
-
-        if (!skipped) { // inter MB
-            mb_has_coeffs = ff_vc1_mbmode_intfrp[0][idx_mbmode][3];
-            if (mb_has_coeffs)
-                cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
-            if (!direct) {
-                if (bmvtype == BMV_TYPE_INTERPOLATED && twomv) {
-                    v->fourmvbp = get_vlc2(gb, v->fourmvbp_vlc->table, VC1_4MV_BLOCK_PATTERN_VLC_BITS, 1);
-                } else if (bmvtype == BMV_TYPE_INTERPOLATED || twomv) {
-                    v->twomvbp = get_vlc2(gb, v->twomvbp_vlc->table, VC1_2MV_BLOCK_PATTERN_VLC_BITS, 1);
-                }
-            }
-
-            for (i = 0; i < 6; i++)
-                v->mb_type[0][s->block_index[i]] = 0;
-            fieldtx = v->fieldtx_plane[mb_pos] = ff_vc1_mbmode_intfrp[0][idx_mbmode][1];
-            /* for all motion vector read MVDATA and motion compensate each block */
-            dst_idx = 0;
-            if (direct) {
-                if (twomv) {
-                    for (i = 0; i < 4; i++) {
-                        vc1_mc_4mv_luma(v, i, 0, 0);
-                        vc1_mc_4mv_luma(v, i, 1, 1);
-                    }
-                    vc1_mc_4mv_chroma4(v, 0, 0, 0);
-                    vc1_mc_4mv_chroma4(v, 1, 1, 1);
-                } else {
-                    vc1_mc_1mv(v, 0);
-                    vc1_interp_mc(v);
-                }
-            } else if (twomv && bmvtype == BMV_TYPE_INTERPOLATED) {
-                mvbp = v->fourmvbp;
-                for (i = 0; i < 4; i++) {
-                    dir = i==1 || i==3;
-                    dmv_x = dmv_y = 0;
-                    val = ((mvbp >> (3 - i)) & 1);
-                    if (val)
-                        get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
-                    j = i > 1 ? 2 : 0;
-                    vc1_pred_mv_intfr(v, j, dmv_x, dmv_y, 2, v->range_x, v->range_y, v->mb_type[0], dir);
-                    vc1_mc_4mv_luma(v, j, dir, dir);
-                    vc1_mc_4mv_luma(v, j+1, dir, dir);
-                }
-
-                vc1_mc_4mv_chroma4(v, 0, 0, 0);
-                vc1_mc_4mv_chroma4(v, 1, 1, 1);
-            } else if (bmvtype == BMV_TYPE_INTERPOLATED) {
-                mvbp = v->twomvbp;
-                dmv_x = dmv_y = 0;
-                if (mvbp & 2)
-                    get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
-
-                vc1_pred_mv_intfr(v, 0, dmv_x, dmv_y, 1, v->range_x, v->range_y, v->mb_type[0], 0);
-                vc1_mc_1mv(v, 0);
-
-                dmv_x = dmv_y = 0;
-                if (mvbp & 1)
-                    get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
-
-                vc1_pred_mv_intfr(v, 0, dmv_x, dmv_y, 1, v->range_x, v->range_y, v->mb_type[0], 1);
-                vc1_interp_mc(v);
-            } else if (twomv) {
-                dir = bmvtype == BMV_TYPE_BACKWARD;
-                dir2 = dir;
-                if (mvsw)
-                    dir2 = !dir;
-                mvbp = v->twomvbp;
-                dmv_x = dmv_y = 0;
-                if (mvbp & 2)
-                    get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
-                vc1_pred_mv_intfr(v, 0, dmv_x, dmv_y, 2, v->range_x, v->range_y, v->mb_type[0], dir);
-
-                dmv_x = dmv_y = 0;
-                if (mvbp & 1)
-                    get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
-                vc1_pred_mv_intfr(v, 2, dmv_x, dmv_y, 2, v->range_x, v->range_y, v->mb_type[0], dir2);
-
-                if (mvsw) {
-                    for (i = 0; i < 2; i++) {
-                        s->mv[dir][i+2][0] = s->mv[dir][i][0] = s->current_picture.motion_val[dir][s->block_index[i+2]][0] = s->current_picture.motion_val[dir][s->block_index[i]][0];
-                        s->mv[dir][i+2][1] = s->mv[dir][i][1] = s->current_picture.motion_val[dir][s->block_index[i+2]][1] = s->current_picture.motion_val[dir][s->block_index[i]][1];
-                        s->mv[dir2][i+2][0] = s->mv[dir2][i][0] = s->current_picture.motion_val[dir2][s->block_index[i]][0] = s->current_picture.motion_val[dir2][s->block_index[i+2]][0];
-                        s->mv[dir2][i+2][1] = s->mv[dir2][i][1] = s->current_picture.motion_val[dir2][s->block_index[i]][1] = s->current_picture.motion_val[dir2][s->block_index[i+2]][1];
-                    }
-                } else {
-                    vc1_pred_mv_intfr(v, 0, 0, 0, 2, v->range_x, v->range_y, v->mb_type[0], !dir);
-                    vc1_pred_mv_intfr(v, 2, 0, 0, 2, v->range_x, v->range_y, v->mb_type[0], !dir);
-                }
-
-                vc1_mc_4mv_luma(v, 0, dir, 0);
-                vc1_mc_4mv_luma(v, 1, dir, 0);
-                vc1_mc_4mv_luma(v, 2, dir2, 0);
-                vc1_mc_4mv_luma(v, 3, dir2, 0);
-                vc1_mc_4mv_chroma4(v, dir, dir2, 0);
-            } else {
-                dir = bmvtype == BMV_TYPE_BACKWARD;
-
-                mvbp = ff_vc1_mbmode_intfrp[0][idx_mbmode][2];
-                dmv_x = dmv_y = 0;
-                if (mvbp)
-                    get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
-
-                vc1_pred_mv_intfr(v, 0, dmv_x, dmv_y, 1, v->range_x, v->range_y, v->mb_type[0], dir);
-                v->blk_mv_type[s->block_index[0]] = 1;
-                v->blk_mv_type[s->block_index[1]] = 1;
-                v->blk_mv_type[s->block_index[2]] = 1;
-                v->blk_mv_type[s->block_index[3]] = 1;
-                vc1_pred_mv_intfr(v, 0, 0, 0, 2, v->range_x, v->range_y, 0, !dir);
-                for (i = 0; i < 2; i++) {
-                    s->mv[!dir][i+2][0] = s->mv[!dir][i][0] = s->current_picture.motion_val[!dir][s->block_index[i+2]][0] = s->current_picture.motion_val[!dir][s->block_index[i]][0];
-                    s->mv[!dir][i+2][1] = s->mv[!dir][i][1] = s->current_picture.motion_val[!dir][s->block_index[i+2]][1] = s->current_picture.motion_val[!dir][s->block_index[i]][1];
-                }
-                vc1_mc_1mv(v, dir);
-            }
-
-            if (cbp)
-                GET_MQUANT();  // p. 227
-            s->current_picture.qscale_table[mb_pos] = mquant;
-            if (!v->ttmbf && cbp)
-                ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);
-            for (i = 0; i < 6; i++) {
-                s->dc_val[0][s->block_index[i]] = 0;
-                dst_idx += i >> 2;
-                val = ((cbp >> (5 - i)) & 1);
-                if (!fieldtx)
-                    off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);
-                else
-                    off = (i & 4) ? 0 : ((i & 1) * 8 + ((i > 1) * s->linesize));
-                if (val) {
-                    pat = vc1_decode_p_block(v, s->block[i], i, mquant, ttmb,
-                                             first_block, s->dest[dst_idx] + off,
-                                             (i & 4) ? s->uvlinesize : (s->linesize << fieldtx),
-                                             (i & 4) && (s->flags & CODEC_FLAG_GRAY), &block_tt);
-                    block_cbp |= pat << (i << 2);
-                    if (!v->ttmbf && ttmb < 8)
-                        ttmb = -1;
-                    first_block = 0;
-                }
-            }
-
-        } else { // skipped
-            dir = 0;
-            for (i = 0; i < 6; i++) {
-                v->mb_type[0][s->block_index[i]] = 0;
-                s->dc_val[0][s->block_index[i]] = 0;
-            }
-            s->current_picture.mb_type[mb_pos]      = MB_TYPE_SKIP;
-            s->current_picture.qscale_table[mb_pos] = 0;
-            v->blk_mv_type[s->block_index[0]] = 0;
-            v->blk_mv_type[s->block_index[1]] = 0;
-            v->blk_mv_type[s->block_index[2]] = 0;
-            v->blk_mv_type[s->block_index[3]] = 0;
-
-            if (!direct) {
-                if (bmvtype == BMV_TYPE_INTERPOLATED) {
-                    vc1_pred_mv_intfr(v, 0, 0, 0, 1, v->range_x, v->range_y, v->mb_type[0], 0);
-                    vc1_pred_mv_intfr(v, 0, 0, 0, 1, v->range_x, v->range_y, v->mb_type[0], 1);
-                } else {
-                    dir = bmvtype == BMV_TYPE_BACKWARD;
-                    vc1_pred_mv_intfr(v, 0, 0, 0, 1, v->range_x, v->range_y, v->mb_type[0], dir);
-                    if (mvsw) {
-                        int dir2 = dir;
-                        if (mvsw)
-                            dir2 = !dir;
-                        for (i = 0; i < 2; i++) {
-                            s->mv[dir][i+2][0] = s->mv[dir][i][0] = s->current_picture.motion_val[dir][s->block_index[i+2]][0] = s->current_picture.motion_val[dir][s->block_index[i]][0];
-                            s->mv[dir][i+2][1] = s->mv[dir][i][1] = s->current_picture.motion_val[dir][s->block_index[i+2]][1] = s->current_picture.motion_val[dir][s->block_index[i]][1];
-                            s->mv[dir2][i+2][0] = s->mv[dir2][i][0] = s->current_picture.motion_val[dir2][s->block_index[i]][0] = s->current_picture.motion_val[dir2][s->block_index[i+2]][0];
-                            s->mv[dir2][i+2][1] = s->mv[dir2][i][1] = s->current_picture.motion_val[dir2][s->block_index[i]][1] = s->current_picture.motion_val[dir2][s->block_index[i+2]][1];
-                        }
-                    } else {
-                        v->blk_mv_type[s->block_index[0]] = 1;
-                        v->blk_mv_type[s->block_index[1]] = 1;
-                        v->blk_mv_type[s->block_index[2]] = 1;
-                        v->blk_mv_type[s->block_index[3]] = 1;
-                        vc1_pred_mv_intfr(v, 0, 0, 0, 2, v->range_x, v->range_y, 0, !dir);
-                        for (i = 0; i < 2; i++) {
-                            s->mv[!dir][i+2][0] = s->mv[!dir][i][0] = s->current_picture.motion_val[!dir][s->block_index[i+2]][0] = s->current_picture.motion_val[!dir][s->block_index[i]][0];
-                            s->mv[!dir][i+2][1] = s->mv[!dir][i][1] = s->current_picture.motion_val[!dir][s->block_index[i+2]][1] = s->current_picture.motion_val[!dir][s->block_index[i]][1];
-                        }
-                    }
-                }
-            }
-
-            vc1_mc_1mv(v, dir);
-            if (direct || bmvtype == BMV_TYPE_INTERPOLATED) {
-                vc1_interp_mc(v);
-            }
-        }
-    }
-    if (s->mb_x == s->mb_width - 1)
-        memmove(v->is_intra_base, v->is_intra, sizeof(v->is_intra_base[0]) * s->mb_stride);
-    v->cbp[s->mb_x]      = block_cbp;
-    v->ttblk[s->mb_x]    = block_tt;
-    return 0;
-}
-
-/** Decode blocks of I-frame
- */
-static void vc1_decode_i_blocks(VC1Context *v)
-{
-    int k, j;
-    MpegEncContext *s = &v->s;
-    int cbp, val;
-    uint8_t *coded_val;
-    int mb_pos;
-
-    /* select codingmode used for VLC tables selection */
-    switch (v->y_ac_table_index) {
-    case 0:
-        v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;
-        break;
-    case 1:
-        v->codingset = CS_HIGH_MOT_INTRA;
-        break;
-    case 2:
-        v->codingset = CS_MID_RATE_INTRA;
-        break;
-    }
-
-    switch (v->c_ac_table_index) {
-    case 0:
-        v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;
-        break;
-    case 1:
-        v->codingset2 = CS_HIGH_MOT_INTER;
-        break;
-    case 2:
-        v->codingset2 = CS_MID_RATE_INTER;
-        break;
-    }
-
-    /* Set DC scale - y and c use the same */
-    s->y_dc_scale = s->y_dc_scale_table[v->pq];
-    s->c_dc_scale = s->c_dc_scale_table[v->pq];
-
-    //do frame decode
-    s->mb_x = s->mb_y = 0;
-    s->mb_intra         = 1;
-    s->first_slice_line = 1;
-    for (s->mb_y = 0; s->mb_y < s->end_mb_y; s->mb_y++) {
-        s->mb_x = 0;
-        init_block_index(v);
-        for (; s->mb_x < v->end_mb_x; s->mb_x++) {
-            uint8_t *dst[6];
-            ff_update_block_index(s);
-            dst[0] = s->dest[0];
-            dst[1] = dst[0] + 8;
-            dst[2] = s->dest[0] + s->linesize * 8;
-            dst[3] = dst[2] + 8;
-            dst[4] = s->dest[1];
-            dst[5] = s->dest[2];
-            s->bdsp.clear_blocks(s->block[0]);
-            mb_pos = s->mb_x + s->mb_y * s->mb_width;
-            s->current_picture.mb_type[mb_pos]                     = MB_TYPE_INTRA;
-            s->current_picture.qscale_table[mb_pos]                = v->pq;
-            s->current_picture.motion_val[1][s->block_index[0]][0] = 0;
-            s->current_picture.motion_val[1][s->block_index[0]][1] = 0;
-
-            // do actual MB decoding and displaying
-            cbp = get_vlc2(&v->s.gb, ff_msmp4_mb_i_vlc.table, MB_INTRA_VLC_BITS, 2);
-            v->s.ac_pred = get_bits1(&v->s.gb);
-
-            for (k = 0; k < 6; k++) {
-                val = ((cbp >> (5 - k)) & 1);
-
-                if (k < 4) {
-                    int pred   = vc1_coded_block_pred(&v->s, k, &coded_val);
-                    val        = val ^ pred;
-                    *coded_val = val;
-                }
-                cbp |= val << (5 - k);
-
-                vc1_decode_i_block(v, s->block[k], k, val, (k < 4) ? v->codingset : v->codingset2);
-
-                if (k > 3 && (s->flags & CODEC_FLAG_GRAY))
-                    continue;
-                v->vc1dsp.vc1_inv_trans_8x8(s->block[k]);
-                if (v->pq >= 9 && v->overlap) {
-                    if (v->rangeredfrm)
-                        for (j = 0; j < 64; j++)
-                            s->block[k][j] <<= 1;
-                    s->idsp.put_signed_pixels_clamped(s->block[k], dst[k],
-                                                      k & 4 ? s->uvlinesize
-                                                            : s->linesize);
-                } else {
-                    if (v->rangeredfrm)
-                        for (j = 0; j < 64; j++)
-                            s->block[k][j] = (s->block[k][j] - 64) << 1;
-                    s->idsp.put_pixels_clamped(s->block[k], dst[k],
-                                               k & 4 ? s->uvlinesize
-                                                     : s->linesize);
-                }
-            }
-
-            if (v->pq >= 9 && v->overlap) {
-                if (s->mb_x) {
-                    v->vc1dsp.vc1_h_overlap(s->dest[0], s->linesize);
-                    v->vc1dsp.vc1_h_overlap(s->dest[0] + 8 * s->linesize, s->linesize);
-                    if (!(s->flags & CODEC_FLAG_GRAY)) {
-                        v->vc1dsp.vc1_h_overlap(s->dest[1], s->uvlinesize);
-                        v->vc1dsp.vc1_h_overlap(s->dest[2], s->uvlinesize);
-                    }
-                }
-                v->vc1dsp.vc1_h_overlap(s->dest[0] + 8, s->linesize);
-                v->vc1dsp.vc1_h_overlap(s->dest[0] + 8 * s->linesize + 8, s->linesize);
-                if (!s->first_slice_line) {
-                    v->vc1dsp.vc1_v_overlap(s->dest[0], s->linesize);
-                    v->vc1dsp.vc1_v_overlap(s->dest[0] + 8, s->linesize);
-                    if (!(s->flags & CODEC_FLAG_GRAY)) {
-                        v->vc1dsp.vc1_v_overlap(s->dest[1], s->uvlinesize);
-                        v->vc1dsp.vc1_v_overlap(s->dest[2], s->uvlinesize);
-                    }
-                }
-                v->vc1dsp.vc1_v_overlap(s->dest[0] + 8 * s->linesize, s->linesize);
-                v->vc1dsp.vc1_v_overlap(s->dest[0] + 8 * s->linesize + 8, s->linesize);
-            }
-            if (v->s.loop_filter) vc1_loop_filter_iblk(v, v->pq);
-
-            if (get_bits_count(&s->gb) > v->bits) {
-                ff_er_add_slice(&s->er, 0, 0, s->mb_x, s->mb_y, ER_MB_ERROR);
-                av_log(s->avctx, AV_LOG_ERROR, "Bits overconsumption: %i > %i\n",
-                       get_bits_count(&s->gb), v->bits);
-                return;
-            }
-        }
-        if (!v->s.loop_filter)
-            ff_mpeg_draw_horiz_band(s, s->mb_y * 16, 16);
-        else if (s->mb_y)
-            ff_mpeg_draw_horiz_band(s, (s->mb_y - 1) * 16, 16);
-
-        s->first_slice_line = 0;
-    }
-    if (v->s.loop_filter)
-        ff_mpeg_draw_horiz_band(s, (s->end_mb_y - 1) * 16, 16);
-
-    /* This is intentionally mb_height and not end_mb_y - unlike in advanced
-     * profile, these only differ are when decoding MSS2 rectangles. */
-    ff_er_add_slice(&s->er, 0, 0, s->mb_width - 1, s->mb_height - 1, ER_MB_END);
-}
-
-/** Decode blocks of I-frame for advanced profile
- */
-static void vc1_decode_i_blocks_adv(VC1Context *v)
-{
-    int k;
-    MpegEncContext *s = &v->s;
-    int cbp, val;
-    uint8_t *coded_val;
-    int mb_pos;
-    int mquant = v->pq;
-    int mqdiff;
-    GetBitContext *gb = &s->gb;
-
-    /* select codingmode used for VLC tables selection */
-    switch (v->y_ac_table_index) {
-    case 0:
-        v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;
-        break;
-    case 1:
-        v->codingset = CS_HIGH_MOT_INTRA;
-        break;
-    case 2:
-        v->codingset = CS_MID_RATE_INTRA;
-        break;
-    }
-
-    switch (v->c_ac_table_index) {
-    case 0:
-        v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;
-        break;
-    case 1:
-        v->codingset2 = CS_HIGH_MOT_INTER;
-        break;
-    case 2:
-        v->codingset2 = CS_MID_RATE_INTER;
-        break;
-    }
-
-    // do frame decode
-    s->mb_x             = s->mb_y = 0;
-    s->mb_intra         = 1;
-    s->first_slice_line = 1;
-    s->mb_y             = s->start_mb_y;
-    if (s->start_mb_y) {
-        s->mb_x = 0;
-        init_block_index(v);
-        memset(&s->coded_block[s->block_index[0] - s->b8_stride], 0,
-               (1 + s->b8_stride) * sizeof(*s->coded_block));
-    }
-    for (; s->mb_y < s->end_mb_y; s->mb_y++) {
-        s->mb_x = 0;
-        init_block_index(v);
-        for (;s->mb_x < s->mb_width; s->mb_x++) {
-            int16_t (*block)[64] = v->block[v->cur_blk_idx];
-            ff_update_block_index(s);
-            s->bdsp.clear_blocks(block[0]);
-            mb_pos = s->mb_x + s->mb_y * s->mb_stride;
-            s->current_picture.mb_type[mb_pos + v->mb_off]                         = MB_TYPE_INTRA;
-            s->current_picture.motion_val[1][s->block_index[0] + v->blocks_off][0] = 0;
-            s->current_picture.motion_val[1][s->block_index[0] + v->blocks_off][1] = 0;
-
-            // do actual MB decoding and displaying
-            if (v->fieldtx_is_raw)
-                v->fieldtx_plane[mb_pos] = get_bits1(&v->s.gb);
-            cbp = get_vlc2(&v->s.gb, ff_msmp4_mb_i_vlc.table, MB_INTRA_VLC_BITS, 2);
-            if ( v->acpred_is_raw)
-                v->s.ac_pred = get_bits1(&v->s.gb);
-            else
-                v->s.ac_pred = v->acpred_plane[mb_pos];
-
-            if (v->condover == CONDOVER_SELECT && v->overflg_is_raw)
-                v->over_flags_plane[mb_pos] = get_bits1(&v->s.gb);
-
-            GET_MQUANT();
-
-            s->current_picture.qscale_table[mb_pos] = mquant;
-            /* Set DC scale - y and c use the same */
-            s->y_dc_scale = s->y_dc_scale_table[mquant];
-            s->c_dc_scale = s->c_dc_scale_table[mquant];
-
-            for (k = 0; k < 6; k++) {
-                val = ((cbp >> (5 - k)) & 1);
-
-                if (k < 4) {
-                    int pred   = vc1_coded_block_pred(&v->s, k, &coded_val);
-                    val        = val ^ pred;
-                    *coded_val = val;
-                }
-                cbp |= val << (5 - k);
-
-                v->a_avail = !s->first_slice_line || (k == 2 || k == 3);
-                v->c_avail = !!s->mb_x || (k == 1 || k == 3);
-
-                vc1_decode_i_block_adv(v, block[k], k, val,
-                                       (k < 4) ? v->codingset : v->codingset2, mquant);
-
-                if (k > 3 && (s->flags & CODEC_FLAG_GRAY))
-                    continue;
-                v->vc1dsp.vc1_inv_trans_8x8(block[k]);
-            }
-
-            vc1_smooth_overlap_filter_iblk(v);
-            vc1_put_signed_blocks_clamped(v);
-            if (v->s.loop_filter) vc1_loop_filter_iblk_delayed(v, v->pq);
-
-            if (get_bits_count(&s->gb) > v->bits) {
-                // TODO: may need modification to handle slice coding
-                ff_er_add_slice(&s->er, 0, s->start_mb_y, s->mb_x, s->mb_y, ER_MB_ERROR);
-                av_log(s->avctx, AV_LOG_ERROR, "Bits overconsumption: %i > %i\n",
-                       get_bits_count(&s->gb), v->bits);
-                return;
-            }
-        }
-        if (!v->s.loop_filter)
-            ff_mpeg_draw_horiz_band(s, s->mb_y * 16, 16);
-        else if (s->mb_y)
-            ff_mpeg_draw_horiz_band(s, (s->mb_y-1) * 16, 16);
-        s->first_slice_line = 0;
-    }
-
-    /* raw bottom MB row */
-    s->mb_x = 0;
-    init_block_index(v);
-
-    for (;s->mb_x < s->mb_width; s->mb_x++) {
-        ff_update_block_index(s);
-        vc1_put_signed_blocks_clamped(v);
-        if (v->s.loop_filter)
-            vc1_loop_filter_iblk_delayed(v, v->pq);
-    }
-    if (v->s.loop_filter)
-        ff_mpeg_draw_horiz_band(s, (s->end_mb_y-1)*16, 16);
-    ff_er_add_slice(&s->er, 0, s->start_mb_y << v->field_mode, s->mb_width - 1,
-                    (s->end_mb_y << v->field_mode) - 1, ER_MB_END);
-}
-
-static void vc1_decode_p_blocks(VC1Context *v)
-{
-    MpegEncContext *s = &v->s;
-    int apply_loop_filter;
-
-    /* select codingmode used for VLC tables selection */
-    switch (v->c_ac_table_index) {
-    case 0:
-        v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;
-        break;
-    case 1:
-        v->codingset = CS_HIGH_MOT_INTRA;
-        break;
-    case 2:
-        v->codingset = CS_MID_RATE_INTRA;
-        break;
-    }
-
-    switch (v->c_ac_table_index) {
-    case 0:
-        v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;
-        break;
-    case 1:
-        v->codingset2 = CS_HIGH_MOT_INTER;
-        break;
-    case 2:
-        v->codingset2 = CS_MID_RATE_INTER;
-        break;
-    }
-
-    apply_loop_filter   = s->loop_filter && !(s->avctx->skip_loop_filter >= AVDISCARD_NONKEY) &&
-                          v->fcm == PROGRESSIVE;
-    s->first_slice_line = 1;
-    memset(v->cbp_base, 0, sizeof(v->cbp_base[0])*2*s->mb_stride);
-    for (s->mb_y = s->start_mb_y; s->mb_y < s->end_mb_y; s->mb_y++) {
-        s->mb_x = 0;
-        init_block_index(v);
-        for (; s->mb_x < s->mb_width; s->mb_x++) {
-            ff_update_block_index(s);
-
-            if (v->fcm == ILACE_FIELD)
-                vc1_decode_p_mb_intfi(v);
-            else if (v->fcm == ILACE_FRAME)
-                vc1_decode_p_mb_intfr(v);
-            else vc1_decode_p_mb(v);
-            if (s->mb_y != s->start_mb_y && apply_loop_filter)
-                vc1_apply_p_loop_filter(v);
-            if (get_bits_count(&s->gb) > v->bits || get_bits_count(&s->gb) < 0) {
-                // TODO: may need modification to handle slice coding
-                ff_er_add_slice(&s->er, 0, s->start_mb_y, s->mb_x, s->mb_y, ER_MB_ERROR);
-                av_log(s->avctx, AV_LOG_ERROR, "Bits overconsumption: %i > %i at %ix%i\n",
-                       get_bits_count(&s->gb), v->bits, s->mb_x, s->mb_y);
-                return;
-            }
-        }
-        memmove(v->cbp_base,      v->cbp,      sizeof(v->cbp_base[0])      * s->mb_stride);
-        memmove(v->ttblk_base,    v->ttblk,    sizeof(v->ttblk_base[0])    * s->mb_stride);
-        memmove(v->is_intra_base, v->is_intra, sizeof(v->is_intra_base[0]) * s->mb_stride);
-        memmove(v->luma_mv_base,  v->luma_mv,  sizeof(v->luma_mv_base[0])  * s->mb_stride);
-        if (s->mb_y != s->start_mb_y) ff_mpeg_draw_horiz_band(s, (s->mb_y - 1) * 16, 16);
-        s->first_slice_line = 0;
-    }
-    if (apply_loop_filter) {
-        s->mb_x = 0;
-        init_block_index(v);
-        for (; s->mb_x < s->mb_width; s->mb_x++) {
-            ff_update_block_index(s);
-            vc1_apply_p_loop_filter(v);
-        }
-    }
-    if (s->end_mb_y >= s->start_mb_y)
-        ff_mpeg_draw_horiz_band(s, (s->end_mb_y - 1) * 16, 16);
-    ff_er_add_slice(&s->er, 0, s->start_mb_y << v->field_mode, s->mb_width - 1,
-                    (s->end_mb_y << v->field_mode) - 1, ER_MB_END);
-}
-
-static void vc1_decode_b_blocks(VC1Context *v)
-{
-    MpegEncContext *s = &v->s;
-
-    /* select codingmode used for VLC tables selection */
-    switch (v->c_ac_table_index) {
-    case 0:
-        v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;
-        break;
-    case 1:
-        v->codingset = CS_HIGH_MOT_INTRA;
-        break;
-    case 2:
-        v->codingset = CS_MID_RATE_INTRA;
-        break;
-    }
-
-    switch (v->c_ac_table_index) {
-    case 0:
-        v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;
-        break;
-    case 1:
-        v->codingset2 = CS_HIGH_MOT_INTER;
-        break;
-    case 2:
-        v->codingset2 = CS_MID_RATE_INTER;
-        break;
-    }
-
-    s->first_slice_line = 1;
-    for (s->mb_y = s->start_mb_y; s->mb_y < s->end_mb_y; s->mb_y++) {
-        s->mb_x = 0;
-        init_block_index(v);
-        for (; s->mb_x < s->mb_width; s->mb_x++) {
-            ff_update_block_index(s);
-
-            if (v->fcm == ILACE_FIELD)
-                vc1_decode_b_mb_intfi(v);
-            else if (v->fcm == ILACE_FRAME)
-                vc1_decode_b_mb_intfr(v);
-            else
-                vc1_decode_b_mb(v);
-            if (get_bits_count(&s->gb) > v->bits || get_bits_count(&s->gb) < 0) {
-                // TODO: may need modification to handle slice coding
-                ff_er_add_slice(&s->er, 0, s->start_mb_y, s->mb_x, s->mb_y, ER_MB_ERROR);
-                av_log(s->avctx, AV_LOG_ERROR, "Bits overconsumption: %i > %i at %ix%i\n",
-                       get_bits_count(&s->gb), v->bits, s->mb_x, s->mb_y);
-                return;
-            }
-            if (v->s.loop_filter) vc1_loop_filter_iblk(v, v->pq);
-        }
-        if (!v->s.loop_filter)
-            ff_mpeg_draw_horiz_band(s, s->mb_y * 16, 16);
-        else if (s->mb_y)
-            ff_mpeg_draw_horiz_band(s, (s->mb_y - 1) * 16, 16);
-        s->first_slice_line = 0;
-    }
-    if (v->s.loop_filter)
-        ff_mpeg_draw_horiz_band(s, (s->end_mb_y - 1) * 16, 16);
-    ff_er_add_slice(&s->er, 0, s->start_mb_y << v->field_mode, s->mb_width - 1,
-                    (s->end_mb_y << v->field_mode) - 1, ER_MB_END);
-}
-
-static void vc1_decode_skip_blocks(VC1Context *v)
-{
-    MpegEncContext *s = &v->s;
-
-    if (!v->s.last_picture.f->data[0])
-        return;
-
-    ff_er_add_slice(&s->er, 0, s->start_mb_y, s->mb_width - 1, s->end_mb_y - 1, ER_MB_END);
-    s->first_slice_line = 1;
-    for (s->mb_y = s->start_mb_y; s->mb_y < s->end_mb_y; s->mb_y++) {
-        s->mb_x = 0;
-        init_block_index(v);
-        ff_update_block_index(s);
-        memcpy(s->dest[0], s->last_picture.f->data[0] + s->mb_y * 16 * s->linesize,   s->linesize   * 16);
-        memcpy(s->dest[1], s->last_picture.f->data[1] + s->mb_y *  8 * s->uvlinesize, s->uvlinesize *  8);
-        memcpy(s->dest[2], s->last_picture.f->data[2] + s->mb_y *  8 * s->uvlinesize, s->uvlinesize *  8);
-        ff_mpeg_draw_horiz_band(s, s->mb_y * 16, 16);
-        s->first_slice_line = 0;
-    }
-    s->pict_type = AV_PICTURE_TYPE_P;
-}
-
-void ff_vc1_decode_blocks(VC1Context *v)
-{
-
-    v->s.esc3_level_length = 0;
-    if (v->x8_type) {
-        ff_intrax8_decode_picture(&v->x8, 2*v->pq + v->halfpq, v->pq * !v->pquantizer);
-    } else {
-        v->cur_blk_idx     =  0;
-        v->left_blk_idx    = -1;
-        v->topleft_blk_idx =  1;
-        v->top_blk_idx     =  2;
-        switch (v->s.pict_type) {
-        case AV_PICTURE_TYPE_I:
-            if (v->profile == PROFILE_ADVANCED)
-                vc1_decode_i_blocks_adv(v);
-            else
-                vc1_decode_i_blocks(v);
-            break;
-        case AV_PICTURE_TYPE_P:
-            if (v->p_frame_skipped)
-                vc1_decode_skip_blocks(v);
-            else
-                vc1_decode_p_blocks(v);
-            break;
-        case AV_PICTURE_TYPE_B:
-            if (v->bi_type) {
-                if (v->profile == PROFILE_ADVANCED)
-                    vc1_decode_i_blocks_adv(v);
-                else
-                    vc1_decode_i_blocks(v);
-            } else
-                vc1_decode_b_blocks(v);
-            break;
-        }
-    }
-}
 
 #if CONFIG_WMV3IMAGE_DECODER || CONFIG_VC1IMAGE_DECODER