Merge commit 'e9a77f4bc084e5174baba3a8bc869ce4d102c4f0'

* commit 'e9a77f4bc084e5174baba3a8bc869ce4d102c4f0':
  h264: move macroblock decoding into its own file

Conflicts:
	libavcodec/Makefile
	libavcodec/h264.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>

3 files changed, 822 insertions, 786 deletions

diff --git a/libavcodec/Makefile b/libavcodec/Makefile
index 134c999aaa..9cabcae620 100644
--- a/libavcodec/Makefile
+++ b/libavcodec/Makefile
@@ -233,8 +233,8 @@ OBJS-$(CONFIG_H263_ENCODER)            += mpeg4videoenc.o mpeg4video.o  \
                                           h263.o ituh263enc.o flvenc.o
 OBJS-$(CONFIG_H264_DECODER)            += h264.o h264_cabac.o h264_cavlc.o \
                                           h264_direct.o h264_loopfilter.o  \
-                                          h264_ps.o h264_refs.o h264_sei.o \
-                                          cabac.o
+                                          h264_mb.o h264_ps.o h264_refs.o  \
+                                          h264_sei.o cabac.o
 OBJS-$(CONFIG_H264_VDA_DECODER)        += vda_h264_dec.o
 OBJS-$(CONFIG_HEVC_DECODER)            += hevc.o hevc_mvs.o hevc_ps.o hevc_sei.o \
                                           hevc_cabac.o hevc_refs.o hevcpred.o    \
diff --git a/libavcodec/h264.c b/libavcodec/h264.c
index eeb867332c..1907f22e3e 100644
--- a/libavcodec/h264.c
+++ b/libavcodec/h264.c
@@ -747,463 +747,6 @@ static int decode_rbsp_trailing(H264Context *h, const uint8_t *src)
     return 0;
 }
 
-static inline int get_lowest_part_list_y(H264Context *h, H264Picture *pic, int n,
-                                         int height, int y_offset, int list)
-{
-    int raw_my             = h->mv_cache[list][scan8[n]][1];
-    int filter_height_down = (raw_my & 3) ? 3 : 0;
-    int full_my            = (raw_my >> 2) + y_offset;
-    int bottom             = full_my + filter_height_down + height;
-
-    av_assert2(height >= 0);
-
-    return FFMAX(0, bottom);
-}
-
-static inline void get_lowest_part_y(H264Context *h, int refs[2][48], int n,
-                                     int height, int y_offset, int list0,
-                                     int list1, int *nrefs)
-{
-    int my;
-
-    y_offset += 16 * (h->mb_y >> MB_FIELD(h));
-
-    if (list0) {
-        int ref_n = h->ref_cache[0][scan8[n]];
-        H264Picture *ref = &h->ref_list[0][ref_n];
-
-        // Error resilience puts the current picture in the ref list.
-        // Don't try to wait on these as it will cause a deadlock.
-        // Fields can wait on each other, though.
-        if (ref->tf.progress->data != h->cur_pic.tf.progress->data ||
-            (ref->reference & 3) != h->picture_structure) {
-            my = get_lowest_part_list_y(h, ref, n, height, y_offset, 0);
-            if (refs[0][ref_n] < 0)
-                nrefs[0] += 1;
-            refs[0][ref_n] = FFMAX(refs[0][ref_n], my);
-        }
-    }
-
-    if (list1) {
-        int ref_n    = h->ref_cache[1][scan8[n]];
-        H264Picture *ref = &h->ref_list[1][ref_n];
-
-        if (ref->tf.progress->data != h->cur_pic.tf.progress->data ||
-            (ref->reference & 3) != h->picture_structure) {
-            my = get_lowest_part_list_y(h, ref, n, height, y_offset, 1);
-            if (refs[1][ref_n] < 0)
-                nrefs[1] += 1;
-            refs[1][ref_n] = FFMAX(refs[1][ref_n], my);
-        }
-    }
-}
-
-/**
- * Wait until all reference frames are available for MC operations.
- *
- * @param h the H264 context
- */
-static void await_references(H264Context *h)
-{
-    const int mb_xy   = h->mb_xy;
-    const int mb_type = h->cur_pic.mb_type[mb_xy];
-    int refs[2][48];
-    int nrefs[2] = { 0 };
-    int ref, list;
-
-    memset(refs, -1, sizeof(refs));
-
-    if (IS_16X16(mb_type)) {
-        get_lowest_part_y(h, refs, 0, 16, 0,
-                          IS_DIR(mb_type, 0, 0), IS_DIR(mb_type, 0, 1), nrefs);
-    } else if (IS_16X8(mb_type)) {
-        get_lowest_part_y(h, refs, 0, 8, 0,
-                          IS_DIR(mb_type, 0, 0), IS_DIR(mb_type, 0, 1), nrefs);
-        get_lowest_part_y(h, refs, 8, 8, 8,
-                          IS_DIR(mb_type, 1, 0), IS_DIR(mb_type, 1, 1), nrefs);
-    } else if (IS_8X16(mb_type)) {
-        get_lowest_part_y(h, refs, 0, 16, 0,
-                          IS_DIR(mb_type, 0, 0), IS_DIR(mb_type, 0, 1), nrefs);
-        get_lowest_part_y(h, refs, 4, 16, 0,
-                          IS_DIR(mb_type, 1, 0), IS_DIR(mb_type, 1, 1), nrefs);
-    } else {
-        int i;
-
-        av_assert2(IS_8X8(mb_type));
-
-        for (i = 0; i < 4; i++) {
-            const int sub_mb_type = h->sub_mb_type[i];
-            const int n           = 4 * i;
-            int y_offset          = (i & 2) << 2;
-
-            if (IS_SUB_8X8(sub_mb_type)) {
-                get_lowest_part_y(h, refs, n, 8, y_offset,
-                                  IS_DIR(sub_mb_type, 0, 0),
-                                  IS_DIR(sub_mb_type, 0, 1),
-                                  nrefs);
-            } else if (IS_SUB_8X4(sub_mb_type)) {
-                get_lowest_part_y(h, refs, n, 4, y_offset,
-                                  IS_DIR(sub_mb_type, 0, 0),
-                                  IS_DIR(sub_mb_type, 0, 1),
-                                  nrefs);
-                get_lowest_part_y(h, refs, n + 2, 4, y_offset + 4,
-                                  IS_DIR(sub_mb_type, 0, 0),
-                                  IS_DIR(sub_mb_type, 0, 1),
-                                  nrefs);
-            } else if (IS_SUB_4X8(sub_mb_type)) {
-                get_lowest_part_y(h, refs, n, 8, y_offset,
-                                  IS_DIR(sub_mb_type, 0, 0),
-                                  IS_DIR(sub_mb_type, 0, 1),
-                                  nrefs);
-                get_lowest_part_y(h, refs, n + 1, 8, y_offset,
-                                  IS_DIR(sub_mb_type, 0, 0),
-                                  IS_DIR(sub_mb_type, 0, 1),
-                                  nrefs);
-            } else {
-                int j;
-                av_assert2(IS_SUB_4X4(sub_mb_type));
-                for (j = 0; j < 4; j++) {
-                    int sub_y_offset = y_offset + 2 * (j & 2);
-                    get_lowest_part_y(h, refs, n + j, 4, sub_y_offset,
-                                      IS_DIR(sub_mb_type, 0, 0),
-                                      IS_DIR(sub_mb_type, 0, 1),
-                                      nrefs);
-                }
-            }
-        }
-    }
-
-    for (list = h->list_count - 1; list >= 0; list--)
-        for (ref = 0; ref < 48 && nrefs[list]; ref++) {
-            int row = refs[list][ref];
-            if (row >= 0) {
-                H264Picture *ref_pic  = &h->ref_list[list][ref];
-                int ref_field         = ref_pic->reference - 1;
-                int ref_field_picture = ref_pic->field_picture;
-                int pic_height        = 16 * h->mb_height >> ref_field_picture;
-
-                row <<= MB_MBAFF(h);
-                nrefs[list]--;
-
-                if (!FIELD_PICTURE(h) && ref_field_picture) { // frame referencing two fields
-                    ff_thread_await_progress(&ref_pic->tf,
-                                             FFMIN((row >> 1) - !(row & 1),
-                                                   pic_height - 1),
-                                             1);
-                    ff_thread_await_progress(&ref_pic->tf,
-                                             FFMIN((row >> 1), pic_height - 1),
-                                             0);
-                } else if (FIELD_PICTURE(h) && !ref_field_picture) { // field referencing one field of a frame
-                    ff_thread_await_progress(&ref_pic->tf,
-                                             FFMIN(row * 2 + ref_field,
-                                                   pic_height - 1),
-                                             0);
-                } else if (FIELD_PICTURE(h)) {
-                    ff_thread_await_progress(&ref_pic->tf,
-                                             FFMIN(row, pic_height - 1),
-                                             ref_field);
-                } else {
-                    ff_thread_await_progress(&ref_pic->tf,
-                                             FFMIN(row, pic_height - 1),
-                                             0);
-                }
-            }
-        }
-}
-
-static av_always_inline void mc_dir_part(H264Context *h, H264Picture *pic,
-                                         int n, int square, int height,
-                                         int delta, int list,
-                                         uint8_t *dest_y, uint8_t *dest_cb,
-                                         uint8_t *dest_cr,
-                                         int src_x_offset, int src_y_offset,
-                                         qpel_mc_func *qpix_op,
-                                         h264_chroma_mc_func chroma_op,
-                                         int pixel_shift, int chroma_idc)
-{
-    const int mx      = h->mv_cache[list][scan8[n]][0] + src_x_offset * 8;
-    int my            = h->mv_cache[list][scan8[n]][1] + src_y_offset * 8;
-    const int luma_xy = (mx & 3) + ((my & 3) << 2);
-    ptrdiff_t offset  = ((mx >> 2) << pixel_shift) + (my >> 2) * h->mb_linesize;
-    uint8_t *src_y    = pic->f.data[0] + offset;
-    uint8_t *src_cb, *src_cr;
-    int extra_width  = 0;
-    int extra_height = 0;
-    int emu = 0;
-    const int full_mx    = mx >> 2;
-    const int full_my    = my >> 2;
-    const int pic_width  = 16 * h->mb_width;
-    const int pic_height = 16 * h->mb_height >> MB_FIELD(h);
-    int ysh;
-
-    if (mx & 7)
-        extra_width -= 3;
-    if (my & 7)
-        extra_height -= 3;
-
-    if (full_mx                <          0 - extra_width  ||
-        full_my                <          0 - extra_height ||
-        full_mx + 16 /*FIXME*/ > pic_width  + extra_width  ||
-        full_my + 16 /*FIXME*/ > pic_height + extra_height) {
-        h->vdsp.emulated_edge_mc(h->edge_emu_buffer,
-                                 src_y - (2 << pixel_shift) - 2 * h->mb_linesize,
-                                 h->mb_linesize, h->mb_linesize,
-                                 16 + 5, 16 + 5 /*FIXME*/, full_mx - 2,
-                                 full_my - 2, pic_width, pic_height);
-        src_y = h->edge_emu_buffer + (2 << pixel_shift) + 2 * h->mb_linesize;
-        emu   = 1;
-    }
-
-    qpix_op[luma_xy](dest_y, src_y, h->mb_linesize); // FIXME try variable height perhaps?
-    if (!square)
-        qpix_op[luma_xy](dest_y + delta, src_y + delta, h->mb_linesize);
-
-    if (CONFIG_GRAY && h->flags & CODEC_FLAG_GRAY)
-        return;
-
-    if (chroma_idc == 3 /* yuv444 */) {
-        src_cb = pic->f.data[1] + offset;
-        if (emu) {
-            h->vdsp.emulated_edge_mc(h->edge_emu_buffer,
-                                     src_cb - (2 << pixel_shift) - 2 * h->mb_linesize,
-                                     h->mb_linesize, h->mb_linesize,
-                                     16 + 5, 16 + 5 /*FIXME*/,
-                                     full_mx - 2, full_my - 2,
-                                     pic_width, pic_height);
-            src_cb = h->edge_emu_buffer + (2 << pixel_shift) + 2 * h->mb_linesize;
-        }
-        qpix_op[luma_xy](dest_cb, src_cb, h->mb_linesize); // FIXME try variable height perhaps?
-        if (!square)
-            qpix_op[luma_xy](dest_cb + delta, src_cb + delta, h->mb_linesize);
-
-        src_cr = pic->f.data[2] + offset;
-        if (emu) {
-            h->vdsp.emulated_edge_mc(h->edge_emu_buffer,
-                                     src_cr - (2 << pixel_shift) - 2 * h->mb_linesize,
-                                     h->mb_linesize, h->mb_linesize,
-                                     16 + 5, 16 + 5 /*FIXME*/,
-                                     full_mx - 2, full_my - 2,
-                                     pic_width, pic_height);
-            src_cr = h->edge_emu_buffer + (2 << pixel_shift) + 2 * h->mb_linesize;
-        }
-        qpix_op[luma_xy](dest_cr, src_cr, h->mb_linesize); // FIXME try variable height perhaps?
-        if (!square)
-            qpix_op[luma_xy](dest_cr + delta, src_cr + delta, h->mb_linesize);
-        return;
-    }
-
-    ysh = 3 - (chroma_idc == 2 /* yuv422 */);
-    if (chroma_idc == 1 /* yuv420 */ && MB_FIELD(h)) {
-        // chroma offset when predicting from a field of opposite parity
-        my  += 2 * ((h->mb_y & 1) - (pic->reference - 1));
-        emu |= (my >> 3) < 0 || (my >> 3) + 8 >= (pic_height >> 1);
-    }
-
-    src_cb = pic->f.data[1] + ((mx >> 3) << pixel_shift) +
-             (my >> ysh) * h->mb_uvlinesize;
-    src_cr = pic->f.data[2] + ((mx >> 3) << pixel_shift) +
-             (my >> ysh) * h->mb_uvlinesize;
-
-    if (emu) {
-        h->vdsp.emulated_edge_mc(h->edge_emu_buffer, src_cb,
-                                 h->mb_uvlinesize, h->mb_uvlinesize,
-                                 9, 8 * chroma_idc + 1, (mx >> 3), (my >> ysh),
-                                 pic_width >> 1, pic_height >> (chroma_idc == 1 /* yuv420 */));
-        src_cb = h->edge_emu_buffer;
-    }
-    chroma_op(dest_cb, src_cb, h->mb_uvlinesize,
-              height >> (chroma_idc == 1 /* yuv420 */),
-              mx & 7, (my << (chroma_idc == 2 /* yuv422 */)) & 7);
-
-    if (emu) {
-        h->vdsp.emulated_edge_mc(h->edge_emu_buffer, src_cr,
-                                 h->mb_uvlinesize, h->mb_uvlinesize,
-                                 9, 8 * chroma_idc + 1, (mx >> 3), (my >> ysh),
-                                 pic_width >> 1, pic_height >> (chroma_idc == 1 /* yuv420 */));
-        src_cr = h->edge_emu_buffer;
-    }
-    chroma_op(dest_cr, src_cr, h->mb_uvlinesize, height >> (chroma_idc == 1 /* yuv420 */),
-              mx & 7, (my << (chroma_idc == 2 /* yuv422 */)) & 7);
-}
-
-static av_always_inline void mc_part_std(H264Context *h, int n, int square,
-                                         int height, int delta,
-                                         uint8_t *dest_y, uint8_t *dest_cb,
-                                         uint8_t *dest_cr,
-                                         int x_offset, int y_offset,
-                                         qpel_mc_func *qpix_put,
-                                         h264_chroma_mc_func chroma_put,
-                                         qpel_mc_func *qpix_avg,
-                                         h264_chroma_mc_func chroma_avg,
-                                         int list0, int list1,
-                                         int pixel_shift, int chroma_idc)
-{
-    qpel_mc_func *qpix_op         = qpix_put;
-    h264_chroma_mc_func chroma_op = chroma_put;
-
-    dest_y += (2 * x_offset << pixel_shift) + 2 * y_offset * h->mb_linesize;
-    if (chroma_idc == 3 /* yuv444 */) {
-        dest_cb += (2 * x_offset << pixel_shift) + 2 * y_offset * h->mb_linesize;
-        dest_cr += (2 * x_offset << pixel_shift) + 2 * y_offset * h->mb_linesize;
-    } else if (chroma_idc == 2 /* yuv422 */) {
-        dest_cb += (x_offset << pixel_shift) + 2 * y_offset * h->mb_uvlinesize;
-        dest_cr += (x_offset << pixel_shift) + 2 * y_offset * h->mb_uvlinesize;
-    } else { /* yuv420 */
-        dest_cb += (x_offset << pixel_shift) + y_offset * h->mb_uvlinesize;
-        dest_cr += (x_offset << pixel_shift) + y_offset * h->mb_uvlinesize;
-    }
-    x_offset += 8 * h->mb_x;
-    y_offset += 8 * (h->mb_y >> MB_FIELD(h));
-
-    if (list0) {
-        H264Picture *ref = &h->ref_list[0][h->ref_cache[0][scan8[n]]];
-        mc_dir_part(h, ref, n, square, height, delta, 0,
-                    dest_y, dest_cb, dest_cr, x_offset, y_offset,
-                    qpix_op, chroma_op, pixel_shift, chroma_idc);
-
-        qpix_op   = qpix_avg;
-        chroma_op = chroma_avg;
-    }
-
-    if (list1) {
-        H264Picture *ref = &h->ref_list[1][h->ref_cache[1][scan8[n]]];
-        mc_dir_part(h, ref, n, square, height, delta, 1,
-                    dest_y, dest_cb, dest_cr, x_offset, y_offset,
-                    qpix_op, chroma_op, pixel_shift, chroma_idc);
-    }
-}
-
-static av_always_inline void mc_part_weighted(H264Context *h, int n, int square,
-                                              int height, int delta,
-                                              uint8_t *dest_y, uint8_t *dest_cb,
-                                              uint8_t *dest_cr,
-                                              int x_offset, int y_offset,
-                                              qpel_mc_func *qpix_put,
-                                              h264_chroma_mc_func chroma_put,
-                                              h264_weight_func luma_weight_op,
-                                              h264_weight_func chroma_weight_op,
-                                              h264_biweight_func luma_weight_avg,
-                                              h264_biweight_func chroma_weight_avg,
-                                              int list0, int list1,
-                                              int pixel_shift, int chroma_idc)
-{
-    int chroma_height;
-
-    dest_y += (2 * x_offset << pixel_shift) + 2 * y_offset * h->mb_linesize;
-    if (chroma_idc == 3 /* yuv444 */) {
-        chroma_height     = height;
-        chroma_weight_avg = luma_weight_avg;
-        chroma_weight_op  = luma_weight_op;
-        dest_cb += (2 * x_offset << pixel_shift) + 2 * y_offset * h->mb_linesize;
-        dest_cr += (2 * x_offset << pixel_shift) + 2 * y_offset * h->mb_linesize;
-    } else if (chroma_idc == 2 /* yuv422 */) {
-        chroma_height = height;
-        dest_cb      += (x_offset << pixel_shift) + 2 * y_offset * h->mb_uvlinesize;
-        dest_cr      += (x_offset << pixel_shift) + 2 * y_offset * h->mb_uvlinesize;
-    } else { /* yuv420 */
-        chroma_height = height >> 1;
-        dest_cb      += (x_offset << pixel_shift) + y_offset * h->mb_uvlinesize;
-        dest_cr      += (x_offset << pixel_shift) + y_offset * h->mb_uvlinesize;
-    }
-    x_offset += 8 * h->mb_x;
-    y_offset += 8 * (h->mb_y >> MB_FIELD(h));
-
-    if (list0 && list1) {
-        /* don't optimize for luma-only case, since B-frames usually
-         * use implicit weights => chroma too. */
-        uint8_t *tmp_cb = h->bipred_scratchpad;
-        uint8_t *tmp_cr = h->bipred_scratchpad + (16 << pixel_shift);
-        uint8_t *tmp_y  = h->bipred_scratchpad + 16 * h->mb_uvlinesize;
-        int refn0       = h->ref_cache[0][scan8[n]];
-        int refn1       = h->ref_cache[1][scan8[n]];
-
-        mc_dir_part(h, &h->ref_list[0][refn0], n, square, height, delta, 0,
-                    dest_y, dest_cb, dest_cr,
-                    x_offset, y_offset, qpix_put, chroma_put,
-                    pixel_shift, chroma_idc);
-        mc_dir_part(h, &h->ref_list[1][refn1], n, square, height, delta, 1,
-                    tmp_y, tmp_cb, tmp_cr,
-                    x_offset, y_offset, qpix_put, chroma_put,
-                    pixel_shift, chroma_idc);
-
-        if (h->use_weight == 2) {
-            int weight0 = h->implicit_weight[refn0][refn1][h->mb_y & 1];
-            int weight1 = 64 - weight0;
-            luma_weight_avg(dest_y, tmp_y, h->mb_linesize,
-                            height, 5, weight0, weight1, 0);
-            chroma_weight_avg(dest_cb, tmp_cb, h->mb_uvlinesize,
-                              chroma_height, 5, weight0, weight1, 0);
-            chroma_weight_avg(dest_cr, tmp_cr, h->mb_uvlinesize,
-                              chroma_height, 5, weight0, weight1, 0);
-        } else {
-            luma_weight_avg(dest_y, tmp_y, h->mb_linesize, height,
-                            h->luma_log2_weight_denom,
-                            h->luma_weight[refn0][0][0],
-                            h->luma_weight[refn1][1][0],
-                            h->luma_weight[refn0][0][1] +
-                            h->luma_weight[refn1][1][1]);
-            chroma_weight_avg(dest_cb, tmp_cb, h->mb_uvlinesize, chroma_height,
-                              h->chroma_log2_weight_denom,
-                              h->chroma_weight[refn0][0][0][0],
-                              h->chroma_weight[refn1][1][0][0],
-                              h->chroma_weight[refn0][0][0][1] +
-                              h->chroma_weight[refn1][1][0][1]);
-            chroma_weight_avg(dest_cr, tmp_cr, h->mb_uvlinesize, chroma_height,
-                              h->chroma_log2_weight_denom,
-                              h->chroma_weight[refn0][0][1][0],
-                              h->chroma_weight[refn1][1][1][0],
-                              h->chroma_weight[refn0][0][1][1] +
-                              h->chroma_weight[refn1][1][1][1]);
-        }
-    } else {
-        int list     = list1 ? 1 : 0;
-        int refn     = h->ref_cache[list][scan8[n]];
-        H264Picture *ref = &h->ref_list[list][refn];
-        mc_dir_part(h, ref, n, square, height, delta, list,
-                    dest_y, dest_cb, dest_cr, x_offset, y_offset,
-                    qpix_put, chroma_put, pixel_shift, chroma_idc);
-
-        luma_weight_op(dest_y, h->mb_linesize, height,
-                       h->luma_log2_weight_denom,
-                       h->luma_weight[refn][list][0],
-                       h->luma_weight[refn][list][1]);
-        if (h->use_weight_chroma) {
-            chroma_weight_op(dest_cb, h->mb_uvlinesize, chroma_height,
-                             h->chroma_log2_weight_denom,
-                             h->chroma_weight[refn][list][0][0],
-                             h->chroma_weight[refn][list][0][1]);
-            chroma_weight_op(dest_cr, h->mb_uvlinesize, chroma_height,
-                             h->chroma_log2_weight_denom,
-                             h->chroma_weight[refn][list][1][0],
-                             h->chroma_weight[refn][list][1][1]);
-        }
-    }
-}
-
-static av_always_inline void prefetch_motion(H264Context *h, int list,
-                                             int pixel_shift, int chroma_idc)
-{
-    /* fetch pixels for estimated mv 4 macroblocks ahead
-     * optimized for 64byte cache lines */
-    const int refn = h->ref_cache[list][scan8[0]];
-    if (refn >= 0) {
-        const int mx  = (h->mv_cache[list][scan8[0]][0] >> 2) + 16 * h->mb_x + 8;
-        const int my  = (h->mv_cache[list][scan8[0]][1] >> 2) + 16 * h->mb_y;
-        uint8_t **src = h->ref_list[list][refn].f.data;
-        int off       = (mx << pixel_shift) +
-                        (my + (h->mb_x & 3) * 4) * h->mb_linesize +
-                        (64 << pixel_shift);
-        h->vdsp.prefetch(src[0] + off, h->linesize, 4);
-        if (chroma_idc == 3 /* yuv444 */) {
-            h->vdsp.prefetch(src[1] + off, h->linesize, 4);
-            h->vdsp.prefetch(src[2] + off, h->linesize, 4);
-        } else {
-            off= (((mx>>1)+64)<<pixel_shift) + ((my>>1) + (h->mb_x&7))*h->uvlinesize;
-            h->vdsp.prefetch(src[1] + off, src[2] - src[1], 2);
-        }
-    }
-}
-
 static void free_tables(H264Context *h, int free_rbsp)
 {
     int i;
@@ -2355,333 +1898,6 @@ static av_always_inline void backup_mb_border(H264Context *h, uint8_t *src_y,
     }
 }
 
-static av_always_inline void xchg_mb_border(H264Context *h, uint8_t *src_y,
-                                            uint8_t *src_cb, uint8_t *src_cr,
-                                            int linesize, int uvlinesize,
-                                            int xchg, int chroma444,
-                                            int simple, int pixel_shift)
-{
-    int deblock_topleft;
-    int deblock_top;
-    int top_idx = 1;
-    uint8_t *top_border_m1;
-    uint8_t *top_border;
-
-    if (!simple && FRAME_MBAFF(h)) {
-        if (h->mb_y & 1) {
-            if (!MB_MBAFF(h))
-                return;
-        } else {
-            top_idx = MB_MBAFF(h) ? 0 : 1;
-        }
-    }
-
-    if (h->deblocking_filter == 2) {
-        deblock_topleft = h->slice_table[h->mb_xy - 1 - h->mb_stride] == h->slice_num;
-        deblock_top     = h->top_type;
-    } else {
-        deblock_topleft = (h->mb_x > 0);
-        deblock_top     = (h->mb_y > !!MB_FIELD(h));
-    }
-
-    src_y  -= linesize   + 1 + pixel_shift;
-    src_cb -= uvlinesize + 1 + pixel_shift;
-    src_cr -= uvlinesize + 1 + pixel_shift;
-
-    top_border_m1 = h->top_borders[top_idx][h->mb_x - 1];
-    top_border    = h->top_borders[top_idx][h->mb_x];
-
-#define XCHG(a, b, xchg)                        \
-    if (pixel_shift) {                          \
-        if (xchg) {                             \
-            AV_SWAP64(b + 0, a + 0);            \
-            AV_SWAP64(b + 8, a + 8);            \
-        } else {                                \
-            AV_COPY128(b, a);                   \
-        }                                       \
-    } else if (xchg)                            \
-        AV_SWAP64(b, a);                        \
-    else                                        \
-        AV_COPY64(b, a);
-
-    if (deblock_top) {
-        if (deblock_topleft) {
-            XCHG(top_border_m1 + (8 << pixel_shift),
-                 src_y - (7 << pixel_shift), 1);
-        }
-        XCHG(top_border + (0 << pixel_shift), src_y + (1 << pixel_shift), xchg);
-        XCHG(top_border + (8 << pixel_shift), src_y + (9 << pixel_shift), 1);
-        if (h->mb_x + 1 < h->mb_width) {
-            XCHG(h->top_borders[top_idx][h->mb_x + 1],
-                 src_y + (17 << pixel_shift), 1);
-        }
-        if (simple || !CONFIG_GRAY || !(h->flags & CODEC_FLAG_GRAY)) {
-            if (chroma444) {
-                if (deblock_topleft) {
-                    XCHG(top_border_m1 + (24 << pixel_shift), src_cb - (7 << pixel_shift), 1);
-                    XCHG(top_border_m1 + (40 << pixel_shift), src_cr - (7 << pixel_shift), 1);
-                }
-                XCHG(top_border + (16 << pixel_shift), src_cb + (1 << pixel_shift), xchg);
-                XCHG(top_border + (24 << pixel_shift), src_cb + (9 << pixel_shift), 1);
-                XCHG(top_border + (32 << pixel_shift), src_cr + (1 << pixel_shift), xchg);
-                XCHG(top_border + (40 << pixel_shift), src_cr + (9 << pixel_shift), 1);
-                if (h->mb_x + 1 < h->mb_width) {
-                    XCHG(h->top_borders[top_idx][h->mb_x + 1] + (16 << pixel_shift), src_cb + (17 << pixel_shift), 1);
-                    XCHG(h->top_borders[top_idx][h->mb_x + 1] + (32 << pixel_shift), src_cr + (17 << pixel_shift), 1);
-                }
-            } else {
-                if (deblock_topleft) {
-                    XCHG(top_border_m1 + (16 << pixel_shift), src_cb - (7 << pixel_shift), 1);
-                    XCHG(top_border_m1 + (24 << pixel_shift), src_cr - (7 << pixel_shift), 1);
-                }
-                XCHG(top_border + (16 << pixel_shift), src_cb + 1 + pixel_shift, 1);
-                XCHG(top_border + (24 << pixel_shift), src_cr + 1 + pixel_shift, 1);
-            }
-        }
-    }
-}
-
-static av_always_inline int dctcoef_get(int16_t *mb, int high_bit_depth,
-                                        int index)
-{
-    if (high_bit_depth) {
-        return AV_RN32A(((int32_t *)mb) + index);
-    } else
-        return AV_RN16A(mb + index);
-}
-
-static av_always_inline void dctcoef_set(int16_t *mb, int high_bit_depth,
-                                         int index, int value)
-{
-    if (high_bit_depth) {
-        AV_WN32A(((int32_t *)mb) + index, value);
-    } else
-        AV_WN16A(mb + index, value);
-}
-
-static av_always_inline void hl_decode_mb_predict_luma(H264Context *h,
-                                                       int mb_type, int is_h264,
-                                                       int simple,
-                                                       int transform_bypass,
-                                                       int pixel_shift,
-                                                       int *block_offset,
-                                                       int linesize,
-                                                       uint8_t *dest_y, int p)
-{
-    void (*idct_add)(uint8_t *dst, int16_t *block, int stride);
-    void (*idct_dc_add)(uint8_t *dst, int16_t *block, int stride);
-    int i;
-    int qscale = p == 0 ? h->qscale : h->chroma_qp[p - 1];
-    block_offset += 16 * p;
-    if (IS_INTRA4x4(mb_type)) {
-        if (IS_8x8DCT(mb_type)) {
-            if (transform_bypass) {
-                idct_dc_add =
-                idct_add    = h->h264dsp.h264_add_pixels8_clear;
-            } else {
-                idct_dc_add = h->h264dsp.h264_idct8_dc_add;
-                idct_add    = h->h264dsp.h264_idct8_add;
-            }
-            for (i = 0; i < 16; i += 4) {
-                uint8_t *const ptr = dest_y + block_offset[i];
-                const int dir      = h->intra4x4_pred_mode_cache[scan8[i]];
-                if (transform_bypass && h->sps.profile_idc == 244 && dir <= 1) {
-                    if (h->x264_build != -1) {
-                        h->hpc.pred8x8l_add[dir](ptr, h->mb + (i * 16 + p * 256 << pixel_shift), linesize);
-                    } else
-                        h->hpc.pred8x8l_filter_add[dir](ptr, h->mb + (i * 16 + p * 256 << pixel_shift),
-                                                        (h-> topleft_samples_available << i) & 0x8000,
-                                                        (h->topright_samples_available << i) & 0x4000, linesize);
-                } else {
-                    const int nnz = h->non_zero_count_cache[scan8[i + p * 16]];
-                    h->hpc.pred8x8l[dir](ptr, (h->topleft_samples_available << i) & 0x8000,
-                                         (h->topright_samples_available << i) & 0x4000, linesize);
-                    if (nnz) {
-                        if (nnz == 1 && dctcoef_get(h->mb, pixel_shift, i * 16 + p * 256))
-                            idct_dc_add(ptr, h->mb + (i * 16 + p * 256 << pixel_shift), linesize);
-                        else
-                            idct_add(ptr, h->mb + (i * 16 + p * 256 << pixel_shift), linesize);
-                    }
-                }
-            }
-        } else {
-            if (transform_bypass) {
-                idct_dc_add  =
-                idct_add     = h->h264dsp.h264_add_pixels4_clear;
-            } else {
-                idct_dc_add = h->h264dsp.h264_idct_dc_add;
-                idct_add    = h->h264dsp.h264_idct_add;
-            }
-            for (i = 0; i < 16; i++) {
-                uint8_t *const ptr = dest_y + block_offset[i];
-                const int dir      = h->intra4x4_pred_mode_cache[scan8[i]];
-
-                if (transform_bypass && h->sps.profile_idc == 244 && dir <= 1) {
-                    h->hpc.pred4x4_add[dir](ptr, h->mb + (i * 16 + p * 256 << pixel_shift), linesize);
-                } else {
-                    uint8_t *topright;
-                    int nnz, tr;
-                    uint64_t tr_high;
-                    if (dir == DIAG_DOWN_LEFT_PRED || dir == VERT_LEFT_PRED) {
-                        const int topright_avail = (h->topright_samples_available << i) & 0x8000;
-                        av_assert2(h->mb_y || linesize <= block_offset[i]);
-                        if (!topright_avail) {
-                            if (pixel_shift) {
-                                tr_high  = ((uint16_t *)ptr)[3 - linesize / 2] * 0x0001000100010001ULL;
-                                topright = (uint8_t *)&tr_high;
-                            } else {
-                                tr       = ptr[3 - linesize] * 0x01010101u;
-                                topright = (uint8_t *)&tr;
-                            }
-                        } else
-                            topright = ptr + (4 << pixel_shift) - linesize;
-                    } else
-                        topright = NULL;
-
-                    h->hpc.pred4x4[dir](ptr, topright, linesize);
-                    nnz = h->non_zero_count_cache[scan8[i + p * 16]];
-                    if (nnz) {
-                        if (is_h264) {
-                            if (nnz == 1 && dctcoef_get(h->mb, pixel_shift, i * 16 + p * 256))
-                                idct_dc_add(ptr, h->mb + (i * 16 + p * 256 << pixel_shift), linesize);
-                            else
-                                idct_add(ptr, h->mb + (i * 16 + p * 256 << pixel_shift), linesize);
-                        } else if (CONFIG_SVQ3_DECODER)
-                            ff_svq3_add_idct_c(ptr, h->mb + i * 16 + p * 256, linesize, qscale, 0);
-                    }
-                }
-            }
-        }
-    } else {
-        h->hpc.pred16x16[h->intra16x16_pred_mode](dest_y, linesize);
-        if (is_h264) {
-            if (h->non_zero_count_cache[scan8[LUMA_DC_BLOCK_INDEX + p]]) {
-                if (!transform_bypass)
-                    h->h264dsp.h264_luma_dc_dequant_idct(h->mb + (p * 256 << pixel_shift),
-                                                         h->mb_luma_dc[p],
-                                                         h->dequant4_coeff[p][qscale][0]);
-                else {
-                    static const uint8_t dc_mapping[16] = {
-                         0 * 16,  1 * 16,  4 * 16,  5 * 16,
-                         2 * 16,  3 * 16,  6 * 16,  7 * 16,
-                         8 * 16,  9 * 16, 12 * 16, 13 * 16,
-                        10 * 16, 11 * 16, 14 * 16, 15 * 16
-                    };
-                    for (i = 0; i < 16; i++)
-                        dctcoef_set(h->mb + (p * 256 << pixel_shift),
-                                    pixel_shift, dc_mapping[i],
-                                    dctcoef_get(h->mb_luma_dc[p],
-                                                pixel_shift, i));
-                }
-            }
-        } else if (CONFIG_SVQ3_DECODER)
-            ff_svq3_luma_dc_dequant_idct_c(h->mb + p * 256,
-                                           h->mb_luma_dc[p], qscale);
-    }
-}
-
-static av_always_inline void hl_decode_mb_idct_luma(H264Context *h, int mb_type,
-                                                    int is_h264, int simple,
-                                                    int transform_bypass,
-                                                    int pixel_shift,
-                                                    int *block_offset,
-                                                    int linesize,
-                                                    uint8_t *dest_y, int p)
-{
-    void (*idct_add)(uint8_t *dst, int16_t *block, int stride);
-    int i;
-    block_offset += 16 * p;
-    if (!IS_INTRA4x4(mb_type)) {
-        if (is_h264) {
-            if (IS_INTRA16x16(mb_type)) {
-                if (transform_bypass) {
-                    if (h->sps.profile_idc == 244 &&
-                        (h->intra16x16_pred_mode == VERT_PRED8x8 ||
-                         h->intra16x16_pred_mode == HOR_PRED8x8)) {
-                        h->hpc.pred16x16_add[h->intra16x16_pred_mode](dest_y, block_offset,
-                                                                      h->mb + (p * 256 << pixel_shift),
-                                                                      linesize);
-                    } else {
-                        for (i = 0; i < 16; i++)
-                            if (h->non_zero_count_cache[scan8[i + p * 16]] ||
-                                dctcoef_get(h->mb, pixel_shift, i * 16 + p * 256))
-                                h->h264dsp.h264_add_pixels4_clear(dest_y + block_offset[i],
-                                                                  h->mb + (i * 16 + p * 256 << pixel_shift),
-                                                                  linesize);
-                    }
-                } else {
-                    h->h264dsp.h264_idct_add16intra(dest_y, block_offset,
-                                                    h->mb + (p * 256 << pixel_shift),
-                                                    linesize,
-                                                    h->non_zero_count_cache + p * 5 * 8);
-                }
-            } else if (h->cbp & 15) {
-                if (transform_bypass) {
-                    const int di = IS_8x8DCT(mb_type) ? 4 : 1;
-                    idct_add = IS_8x8DCT(mb_type) ? h->h264dsp.h264_add_pixels8_clear
-                                                  : h->h264dsp.h264_add_pixels4_clear;
-                    for (i = 0; i < 16; i += di)
-                        if (h->non_zero_count_cache[scan8[i + p * 16]])
-                            idct_add(dest_y + block_offset[i],
-                                     h->mb + (i * 16 + p * 256 << pixel_shift),
-                                     linesize);
-                } else {
-                    if (IS_8x8DCT(mb_type))
-                        h->h264dsp.h264_idct8_add4(dest_y, block_offset,
-                                                   h->mb + (p * 256 << pixel_shift),
-                                                   linesize,
-                                                   h->non_zero_count_cache + p * 5 * 8);
-                    else
-                        h->h264dsp.h264_idct_add16(dest_y, block_offset,
-                                                   h->mb + (p * 256 << pixel_shift),
-                                                   linesize,
-                                                   h->non_zero_count_cache + p * 5 * 8);
-                }
-            }
-        } else if (CONFIG_SVQ3_DECODER) {
-            for (i = 0; i < 16; i++)
-                if (h->non_zero_count_cache[scan8[i + p * 16]] || h->mb[i * 16 + p * 256]) {
-                    // FIXME benchmark weird rule, & below
-                    uint8_t *const ptr = dest_y + block_offset[i];
-                    ff_svq3_add_idct_c(ptr, h->mb + i * 16 + p * 256, linesize,
-                                       h->qscale, IS_INTRA(mb_type) ? 1 : 0);
-                }
-        }
-    }
-}
-
-#define BITS   8
-#define SIMPLE 1
-#include "h264_mb_template.c"
-
-#undef  BITS
-#define BITS   16
-#include "h264_mb_template.c"
-
-#undef  SIMPLE
-#define SIMPLE 0
-#include "h264_mb_template.c"
-
-void ff_h264_hl_decode_mb(H264Context *h)
-{
-    const int mb_xy   = h->mb_xy;
-    const int mb_type = h->cur_pic.mb_type[mb_xy];
-    int is_complex    = CONFIG_SMALL || h->is_complex ||
-                        IS_INTRA_PCM(mb_type) || h->qscale == 0;
-
-    if (CHROMA444(h)) {
-        if (is_complex || h->pixel_shift)
-            hl_decode_mb_444_complex(h);
-        else
-            hl_decode_mb_444_simple_8(h);
-    } else if (is_complex) {
-        hl_decode_mb_complex(h);
-    } else if (h->pixel_shift) {
-        hl_decode_mb_simple_16(h);
-    } else
-        hl_decode_mb_simple_8(h);
-}
-
 int ff_pred_weight_table(H264Context *h)
 {
     int list, i;
diff --git a/libavcodec/h264_mb.c b/libavcodec/h264_mb.c
new file mode 100644
index 0000000000..ff902beef4
--- /dev/null
+++ b/libavcodec/h264_mb.c
@@ -0,0 +1,820 @@
+/*
+ * H.26L/H.264/AVC/JVT/14496-10/... decoder
+ * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * H.264 / AVC / MPEG4 part10 macroblock decoding
+ */
+
+#include <stdint.h>
+
+#include "config.h"
+
+#include "libavutil/common.h"
+#include "libavutil/intreadwrite.h"
+#include "avcodec.h"
+#include "h264.h"
+#include "svq3.h"
+#include "thread.h"
+
+static inline int get_lowest_part_list_y(H264Context *h, H264Picture *pic, int n,
+                                         int height, int y_offset, int list)
+{
+    int raw_my             = h->mv_cache[list][scan8[n]][1];
+    int filter_height_down = (raw_my & 3) ? 3 : 0;
+    int full_my            = (raw_my >> 2) + y_offset;
+    int bottom             = full_my + filter_height_down + height;
+
+    av_assert2(height >= 0);
+
+    return FFMAX(0, bottom);
+}
+
+static inline void get_lowest_part_y(H264Context *h, int refs[2][48], int n,
+                                     int height, int y_offset, int list0,
+                                     int list1, int *nrefs)
+{
+    int my;
+
+    y_offset += 16 * (h->mb_y >> MB_FIELD(h));
+
+    if (list0) {
+        int ref_n = h->ref_cache[0][scan8[n]];
+        H264Picture *ref = &h->ref_list[0][ref_n];
+
+        // Error resilience puts the current picture in the ref list.
+        // Don't try to wait on these as it will cause a deadlock.
+        // Fields can wait on each other, though.
+        if (ref->tf.progress->data != h->cur_pic.tf.progress->data ||
+            (ref->reference & 3) != h->picture_structure) {
+            my = get_lowest_part_list_y(h, ref, n, height, y_offset, 0);
+            if (refs[0][ref_n] < 0)
+                nrefs[0] += 1;
+            refs[0][ref_n] = FFMAX(refs[0][ref_n], my);
+        }
+    }
+
+    if (list1) {
+        int ref_n    = h->ref_cache[1][scan8[n]];
+        H264Picture *ref = &h->ref_list[1][ref_n];
+
+        if (ref->tf.progress->data != h->cur_pic.tf.progress->data ||
+            (ref->reference & 3) != h->picture_structure) {
+            my = get_lowest_part_list_y(h, ref, n, height, y_offset, 1);
+            if (refs[1][ref_n] < 0)
+                nrefs[1] += 1;
+            refs[1][ref_n] = FFMAX(refs[1][ref_n], my);
+        }
+    }
+}
+
+/**
+ * Wait until all reference frames are available for MC operations.
+ *
+ * @param h the H264 context
+ */
+static void await_references(H264Context *h)
+{
+    const int mb_xy   = h->mb_xy;
+    const int mb_type = h->cur_pic.mb_type[mb_xy];
+    int refs[2][48];
+    int nrefs[2] = { 0 };
+    int ref, list;
+
+    memset(refs, -1, sizeof(refs));
+
+    if (IS_16X16(mb_type)) {
+        get_lowest_part_y(h, refs, 0, 16, 0,
+                          IS_DIR(mb_type, 0, 0), IS_DIR(mb_type, 0, 1), nrefs);
+    } else if (IS_16X8(mb_type)) {
+        get_lowest_part_y(h, refs, 0, 8, 0,
+                          IS_DIR(mb_type, 0, 0), IS_DIR(mb_type, 0, 1), nrefs);
+        get_lowest_part_y(h, refs, 8, 8, 8,
+                          IS_DIR(mb_type, 1, 0), IS_DIR(mb_type, 1, 1), nrefs);
+    } else if (IS_8X16(mb_type)) {
+        get_lowest_part_y(h, refs, 0, 16, 0,
+                          IS_DIR(mb_type, 0, 0), IS_DIR(mb_type, 0, 1), nrefs);
+        get_lowest_part_y(h, refs, 4, 16, 0,
+                          IS_DIR(mb_type, 1, 0), IS_DIR(mb_type, 1, 1), nrefs);
+    } else {
+        int i;
+
+        av_assert2(IS_8X8(mb_type));
+
+        for (i = 0; i < 4; i++) {
+            const int sub_mb_type = h->sub_mb_type[i];
+            const int n           = 4 * i;
+            int y_offset          = (i & 2) << 2;
+
+            if (IS_SUB_8X8(sub_mb_type)) {
+                get_lowest_part_y(h, refs, n, 8, y_offset,
+                                  IS_DIR(sub_mb_type, 0, 0),
+                                  IS_DIR(sub_mb_type, 0, 1),
+                                  nrefs);
+            } else if (IS_SUB_8X4(sub_mb_type)) {
+                get_lowest_part_y(h, refs, n, 4, y_offset,
+                                  IS_DIR(sub_mb_type, 0, 0),
+                                  IS_DIR(sub_mb_type, 0, 1),
+                                  nrefs);
+                get_lowest_part_y(h, refs, n + 2, 4, y_offset + 4,
+                                  IS_DIR(sub_mb_type, 0, 0),
+                                  IS_DIR(sub_mb_type, 0, 1),
+                                  nrefs);
+            } else if (IS_SUB_4X8(sub_mb_type)) {
+                get_lowest_part_y(h, refs, n, 8, y_offset,
+                                  IS_DIR(sub_mb_type, 0, 0),
+                                  IS_DIR(sub_mb_type, 0, 1),
+                                  nrefs);
+                get_lowest_part_y(h, refs, n + 1, 8, y_offset,
+                                  IS_DIR(sub_mb_type, 0, 0),
+                                  IS_DIR(sub_mb_type, 0, 1),
+                                  nrefs);
+            } else {
+                int j;
+                av_assert2(IS_SUB_4X4(sub_mb_type));
+                for (j = 0; j < 4; j++) {
+                    int sub_y_offset = y_offset + 2 * (j & 2);
+                    get_lowest_part_y(h, refs, n + j, 4, sub_y_offset,
+                                      IS_DIR(sub_mb_type, 0, 0),
+                                      IS_DIR(sub_mb_type, 0, 1),
+                                      nrefs);
+                }
+            }
+        }
+    }
+
+    for (list = h->list_count - 1; list >= 0; list--)
+        for (ref = 0; ref < 48 && nrefs[list]; ref++) {
+            int row = refs[list][ref];
+            if (row >= 0) {
+                H264Picture *ref_pic  = &h->ref_list[list][ref];
+                int ref_field         = ref_pic->reference - 1;
+                int ref_field_picture = ref_pic->field_picture;
+                int pic_height        = 16 * h->mb_height >> ref_field_picture;
+
+                row <<= MB_MBAFF(h);
+                nrefs[list]--;
+
+                if (!FIELD_PICTURE(h) && ref_field_picture) { // frame referencing two fields
+                    ff_thread_await_progress(&ref_pic->tf,
+                                             FFMIN((row >> 1) - !(row & 1),
+                                                   pic_height - 1),
+                                             1);
+                    ff_thread_await_progress(&ref_pic->tf,
+                                             FFMIN((row >> 1), pic_height - 1),
+                                             0);
+                } else if (FIELD_PICTURE(h) && !ref_field_picture) { // field referencing one field of a frame
+                    ff_thread_await_progress(&ref_pic->tf,
+                                             FFMIN(row * 2 + ref_field,
+                                                   pic_height - 1),
+                                             0);
+                } else if (FIELD_PICTURE(h)) {
+                    ff_thread_await_progress(&ref_pic->tf,
+                                             FFMIN(row, pic_height - 1),
+                                             ref_field);
+                } else {
+                    ff_thread_await_progress(&ref_pic->tf,
+                                             FFMIN(row, pic_height - 1),
+                                             0);
+                }
+            }
+        }
+}
+
+static av_always_inline void mc_dir_part(H264Context *h, H264Picture *pic,
+                                         int n, int square, int height,
+                                         int delta, int list,
+                                         uint8_t *dest_y, uint8_t *dest_cb,
+                                         uint8_t *dest_cr,
+                                         int src_x_offset, int src_y_offset,
+                                         qpel_mc_func *qpix_op,
+                                         h264_chroma_mc_func chroma_op,
+                                         int pixel_shift, int chroma_idc)
+{
+    const int mx      = h->mv_cache[list][scan8[n]][0] + src_x_offset * 8;
+    int my            = h->mv_cache[list][scan8[n]][1] + src_y_offset * 8;
+    const int luma_xy = (mx & 3) + ((my & 3) << 2);
+    ptrdiff_t offset  = ((mx >> 2) << pixel_shift) + (my >> 2) * h->mb_linesize;
+    uint8_t *src_y    = pic->f.data[0] + offset;
+    uint8_t *src_cb, *src_cr;
+    int extra_width  = 0;
+    int extra_height = 0;
+    int emu = 0;
+    const int full_mx    = mx >> 2;
+    const int full_my    = my >> 2;
+    const int pic_width  = 16 * h->mb_width;
+    const int pic_height = 16 * h->mb_height >> MB_FIELD(h);
+    int ysh;
+
+    if (mx & 7)
+        extra_width -= 3;
+    if (my & 7)
+        extra_height -= 3;
+
+    if (full_mx                <          0 - extra_width  ||
+        full_my                <          0 - extra_height ||
+        full_mx + 16 /*FIXME*/ > pic_width  + extra_width  ||
+        full_my + 16 /*FIXME*/ > pic_height + extra_height) {
+        h->vdsp.emulated_edge_mc(h->edge_emu_buffer,
+                                 src_y - (2 << pixel_shift) - 2 * h->mb_linesize,
+                                 h->mb_linesize, h->mb_linesize,
+                                 16 + 5, 16 + 5 /*FIXME*/, full_mx - 2,
+                                 full_my - 2, pic_width, pic_height);
+        src_y = h->edge_emu_buffer + (2 << pixel_shift) + 2 * h->mb_linesize;
+        emu   = 1;
+    }
+
+    qpix_op[luma_xy](dest_y, src_y, h->mb_linesize); // FIXME try variable height perhaps?
+    if (!square)
+        qpix_op[luma_xy](dest_y + delta, src_y + delta, h->mb_linesize);
+
+    if (CONFIG_GRAY && h->flags & CODEC_FLAG_GRAY)
+        return;
+
+    if (chroma_idc == 3 /* yuv444 */) {
+        src_cb = pic->f.data[1] + offset;
+        if (emu) {
+            h->vdsp.emulated_edge_mc(h->edge_emu_buffer,
+                                     src_cb - (2 << pixel_shift) - 2 * h->mb_linesize,
+                                     h->mb_linesize, h->mb_linesize,
+                                     16 + 5, 16 + 5 /*FIXME*/,
+                                     full_mx - 2, full_my - 2,
+                                     pic_width, pic_height);
+            src_cb = h->edge_emu_buffer + (2 << pixel_shift) + 2 * h->mb_linesize;
+        }
+        qpix_op[luma_xy](dest_cb, src_cb, h->mb_linesize); // FIXME try variable height perhaps?
+        if (!square)
+            qpix_op[luma_xy](dest_cb + delta, src_cb + delta, h->mb_linesize);
+
+        src_cr = pic->f.data[2] + offset;
+        if (emu) {
+            h->vdsp.emulated_edge_mc(h->edge_emu_buffer,
+                                     src_cr - (2 << pixel_shift) - 2 * h->mb_linesize,
+                                     h->mb_linesize, h->mb_linesize,
+                                     16 + 5, 16 + 5 /*FIXME*/,
+                                     full_mx - 2, full_my - 2,
+                                     pic_width, pic_height);
+            src_cr = h->edge_emu_buffer + (2 << pixel_shift) + 2 * h->mb_linesize;
+        }
+        qpix_op[luma_xy](dest_cr, src_cr, h->mb_linesize); // FIXME try variable height perhaps?
+        if (!square)
+            qpix_op[luma_xy](dest_cr + delta, src_cr + delta, h->mb_linesize);
+        return;
+    }
+
+    ysh = 3 - (chroma_idc == 2 /* yuv422 */);
+    if (chroma_idc == 1 /* yuv420 */ && MB_FIELD(h)) {
+        // chroma offset when predicting from a field of opposite parity
+        my  += 2 * ((h->mb_y & 1) - (pic->reference - 1));
+        emu |= (my >> 3) < 0 || (my >> 3) + 8 >= (pic_height >> 1);
+    }
+
+    src_cb = pic->f.data[1] + ((mx >> 3) << pixel_shift) +
+             (my >> ysh) * h->mb_uvlinesize;
+    src_cr = pic->f.data[2] + ((mx >> 3) << pixel_shift) +
+             (my >> ysh) * h->mb_uvlinesize;
+
+    if (emu) {
+        h->vdsp.emulated_edge_mc(h->edge_emu_buffer, src_cb,
+                                 h->mb_uvlinesize, h->mb_uvlinesize,
+                                 9, 8 * chroma_idc + 1, (mx >> 3), (my >> ysh),
+                                 pic_width >> 1, pic_height >> (chroma_idc == 1 /* yuv420 */));
+        src_cb = h->edge_emu_buffer;
+    }
+    chroma_op(dest_cb, src_cb, h->mb_uvlinesize,
+              height >> (chroma_idc == 1 /* yuv420 */),
+              mx & 7, (my << (chroma_idc == 2 /* yuv422 */)) & 7);
+
+    if (emu) {
+        h->vdsp.emulated_edge_mc(h->edge_emu_buffer, src_cr,
+                                 h->mb_uvlinesize, h->mb_uvlinesize,
+                                 9, 8 * chroma_idc + 1, (mx >> 3), (my >> ysh),
+                                 pic_width >> 1, pic_height >> (chroma_idc == 1 /* yuv420 */));
+        src_cr = h->edge_emu_buffer;
+    }
+    chroma_op(dest_cr, src_cr, h->mb_uvlinesize, height >> (chroma_idc == 1 /* yuv420 */),
+              mx & 7, (my << (chroma_idc == 2 /* yuv422 */)) & 7);
+}
+
+static av_always_inline void mc_part_std(H264Context *h, int n, int square,
+                                         int height, int delta,
+                                         uint8_t *dest_y, uint8_t *dest_cb,
+                                         uint8_t *dest_cr,
+                                         int x_offset, int y_offset,
+                                         qpel_mc_func *qpix_put,
+                                         h264_chroma_mc_func chroma_put,
+                                         qpel_mc_func *qpix_avg,
+                                         h264_chroma_mc_func chroma_avg,
+                                         int list0, int list1,
+                                         int pixel_shift, int chroma_idc)
+{
+    qpel_mc_func *qpix_op         = qpix_put;
+    h264_chroma_mc_func chroma_op = chroma_put;
+
+    dest_y += (2 * x_offset << pixel_shift) + 2 * y_offset * h->mb_linesize;
+    if (chroma_idc == 3 /* yuv444 */) {
+        dest_cb += (2 * x_offset << pixel_shift) + 2 * y_offset * h->mb_linesize;
+        dest_cr += (2 * x_offset << pixel_shift) + 2 * y_offset * h->mb_linesize;
+    } else if (chroma_idc == 2 /* yuv422 */) {
+        dest_cb += (x_offset << pixel_shift) + 2 * y_offset * h->mb_uvlinesize;
+        dest_cr += (x_offset << pixel_shift) + 2 * y_offset * h->mb_uvlinesize;
+    } else { /* yuv420 */
+        dest_cb += (x_offset << pixel_shift) + y_offset * h->mb_uvlinesize;
+        dest_cr += (x_offset << pixel_shift) + y_offset * h->mb_uvlinesize;
+    }
+    x_offset += 8 * h->mb_x;
+    y_offset += 8 * (h->mb_y >> MB_FIELD(h));
+
+    if (list0) {
+        H264Picture *ref = &h->ref_list[0][h->ref_cache[0][scan8[n]]];
+        mc_dir_part(h, ref, n, square, height, delta, 0,
+                    dest_y, dest_cb, dest_cr, x_offset, y_offset,
+                    qpix_op, chroma_op, pixel_shift, chroma_idc);
+
+        qpix_op   = qpix_avg;
+        chroma_op = chroma_avg;
+    }
+
+    if (list1) {
+        H264Picture *ref = &h->ref_list[1][h->ref_cache[1][scan8[n]]];
+        mc_dir_part(h, ref, n, square, height, delta, 1,
+                    dest_y, dest_cb, dest_cr, x_offset, y_offset,
+                    qpix_op, chroma_op, pixel_shift, chroma_idc);
+    }
+}
+
+static av_always_inline void mc_part_weighted(H264Context *h, int n, int square,
+                                              int height, int delta,
+                                              uint8_t *dest_y, uint8_t *dest_cb,
+                                              uint8_t *dest_cr,
+                                              int x_offset, int y_offset,
+                                              qpel_mc_func *qpix_put,
+                                              h264_chroma_mc_func chroma_put,
+                                              h264_weight_func luma_weight_op,
+                                              h264_weight_func chroma_weight_op,
+                                              h264_biweight_func luma_weight_avg,
+                                              h264_biweight_func chroma_weight_avg,
+                                              int list0, int list1,
+                                              int pixel_shift, int chroma_idc)
+{
+    int chroma_height;
+
+    dest_y += (2 * x_offset << pixel_shift) + 2 * y_offset * h->mb_linesize;
+    if (chroma_idc == 3 /* yuv444 */) {
+        chroma_height     = height;
+        chroma_weight_avg = luma_weight_avg;
+        chroma_weight_op  = luma_weight_op;
+        dest_cb += (2 * x_offset << pixel_shift) + 2 * y_offset * h->mb_linesize;
+        dest_cr += (2 * x_offset << pixel_shift) + 2 * y_offset * h->mb_linesize;
+    } else if (chroma_idc == 2 /* yuv422 */) {
+        chroma_height = height;
+        dest_cb      += (x_offset << pixel_shift) + 2 * y_offset * h->mb_uvlinesize;
+        dest_cr      += (x_offset << pixel_shift) + 2 * y_offset * h->mb_uvlinesize;
+    } else { /* yuv420 */
+        chroma_height = height >> 1;
+        dest_cb      += (x_offset << pixel_shift) + y_offset * h->mb_uvlinesize;
+        dest_cr      += (x_offset << pixel_shift) + y_offset * h->mb_uvlinesize;
+    }
+    x_offset += 8 * h->mb_x;
+    y_offset += 8 * (h->mb_y >> MB_FIELD(h));
+
+    if (list0 && list1) {
+        /* don't optimize for luma-only case, since B-frames usually
+         * use implicit weights => chroma too. */
+        uint8_t *tmp_cb = h->bipred_scratchpad;
+        uint8_t *tmp_cr = h->bipred_scratchpad + (16 << pixel_shift);
+        uint8_t *tmp_y  = h->bipred_scratchpad + 16 * h->mb_uvlinesize;
+        int refn0       = h->ref_cache[0][scan8[n]];
+        int refn1       = h->ref_cache[1][scan8[n]];
+
+        mc_dir_part(h, &h->ref_list[0][refn0], n, square, height, delta, 0,
+                    dest_y, dest_cb, dest_cr,
+                    x_offset, y_offset, qpix_put, chroma_put,
+                    pixel_shift, chroma_idc);
+        mc_dir_part(h, &h->ref_list[1][refn1], n, square, height, delta, 1,
+                    tmp_y, tmp_cb, tmp_cr,
+                    x_offset, y_offset, qpix_put, chroma_put,
+                    pixel_shift, chroma_idc);
+
+        if (h->use_weight == 2) {
+            int weight0 = h->implicit_weight[refn0][refn1][h->mb_y & 1];
+            int weight1 = 64 - weight0;
+            luma_weight_avg(dest_y, tmp_y, h->mb_linesize,
+                            height, 5, weight0, weight1, 0);
+            chroma_weight_avg(dest_cb, tmp_cb, h->mb_uvlinesize,
+                              chroma_height, 5, weight0, weight1, 0);
+            chroma_weight_avg(dest_cr, tmp_cr, h->mb_uvlinesize,
+                              chroma_height, 5, weight0, weight1, 0);
+        } else {
+            luma_weight_avg(dest_y, tmp_y, h->mb_linesize, height,
+                            h->luma_log2_weight_denom,
+                            h->luma_weight[refn0][0][0],
+                            h->luma_weight[refn1][1][0],
+                            h->luma_weight[refn0][0][1] +
+                            h->luma_weight[refn1][1][1]);
+            chroma_weight_avg(dest_cb, tmp_cb, h->mb_uvlinesize, chroma_height,
+                              h->chroma_log2_weight_denom,
+                              h->chroma_weight[refn0][0][0][0],
+                              h->chroma_weight[refn1][1][0][0],
+                              h->chroma_weight[refn0][0][0][1] +
+                              h->chroma_weight[refn1][1][0][1]);
+            chroma_weight_avg(dest_cr, tmp_cr, h->mb_uvlinesize, chroma_height,
+                              h->chroma_log2_weight_denom,
+                              h->chroma_weight[refn0][0][1][0],
+                              h->chroma_weight[refn1][1][1][0],
+                              h->chroma_weight[refn0][0][1][1] +
+                              h->chroma_weight[refn1][1][1][1]);
+        }
+    } else {
+        int list     = list1 ? 1 : 0;
+        int refn     = h->ref_cache[list][scan8[n]];
+        H264Picture *ref = &h->ref_list[list][refn];
+        mc_dir_part(h, ref, n, square, height, delta, list,
+                    dest_y, dest_cb, dest_cr, x_offset, y_offset,
+                    qpix_put, chroma_put, pixel_shift, chroma_idc);
+
+        luma_weight_op(dest_y, h->mb_linesize, height,
+                       h->luma_log2_weight_denom,
+                       h->luma_weight[refn][list][0],
+                       h->luma_weight[refn][list][1]);
+        if (h->use_weight_chroma) {
+            chroma_weight_op(dest_cb, h->mb_uvlinesize, chroma_height,
+                             h->chroma_log2_weight_denom,
+                             h->chroma_weight[refn][list][0][0],
+                             h->chroma_weight[refn][list][0][1]);
+            chroma_weight_op(dest_cr, h->mb_uvlinesize, chroma_height,
+                             h->chroma_log2_weight_denom,
+                             h->chroma_weight[refn][list][1][0],
+                             h->chroma_weight[refn][list][1][1]);
+        }
+    }
+}
+
+static av_always_inline void prefetch_motion(H264Context *h, int list,
+                                             int pixel_shift, int chroma_idc)
+{
+    /* fetch pixels for estimated mv 4 macroblocks ahead
+     * optimized for 64byte cache lines */
+    const int refn = h->ref_cache[list][scan8[0]];
+    if (refn >= 0) {
+        const int mx  = (h->mv_cache[list][scan8[0]][0] >> 2) + 16 * h->mb_x + 8;
+        const int my  = (h->mv_cache[list][scan8[0]][1] >> 2) + 16 * h->mb_y;
+        uint8_t **src = h->ref_list[list][refn].f.data;
+        int off       = (mx << pixel_shift) +
+                        (my + (h->mb_x & 3) * 4) * h->mb_linesize +
+                        (64 << pixel_shift);
+        h->vdsp.prefetch(src[0] + off, h->linesize, 4);
+        if (chroma_idc == 3 /* yuv444 */) {
+            h->vdsp.prefetch(src[1] + off, h->linesize, 4);
+            h->vdsp.prefetch(src[2] + off, h->linesize, 4);
+        } else {
+            off= (((mx>>1)+64)<<pixel_shift) + ((my>>1) + (h->mb_x&7))*h->uvlinesize;
+            h->vdsp.prefetch(src[1] + off, src[2] - src[1], 2);
+        }
+    }
+}
+
+static av_always_inline void xchg_mb_border(H264Context *h, uint8_t *src_y,
+                                            uint8_t *src_cb, uint8_t *src_cr,
+                                            int linesize, int uvlinesize,
+                                            int xchg, int chroma444,
+                                            int simple, int pixel_shift)
+{
+    int deblock_topleft;
+    int deblock_top;
+    int top_idx = 1;
+    uint8_t *top_border_m1;
+    uint8_t *top_border;
+
+    if (!simple && FRAME_MBAFF(h)) {
+        if (h->mb_y & 1) {
+            if (!MB_MBAFF(h))
+                return;
+        } else {
+            top_idx = MB_MBAFF(h) ? 0 : 1;
+        }
+    }
+
+    if (h->deblocking_filter == 2) {
+        deblock_topleft = h->slice_table[h->mb_xy - 1 - h->mb_stride] == h->slice_num;
+        deblock_top     = h->top_type;
+    } else {
+        deblock_topleft = (h->mb_x > 0);
+        deblock_top     = (h->mb_y > !!MB_FIELD(h));
+    }
+
+    src_y  -= linesize   + 1 + pixel_shift;
+    src_cb -= uvlinesize + 1 + pixel_shift;
+    src_cr -= uvlinesize + 1 + pixel_shift;
+
+    top_border_m1 = h->top_borders[top_idx][h->mb_x - 1];
+    top_border    = h->top_borders[top_idx][h->mb_x];
+
+#define XCHG(a, b, xchg)                        \
+    if (pixel_shift) {                          \
+        if (xchg) {                             \
+            AV_SWAP64(b + 0, a + 0);            \
+            AV_SWAP64(b + 8, a + 8);            \
+        } else {                                \
+            AV_COPY128(b, a);                   \
+        }                                       \
+    } else if (xchg)                            \
+        AV_SWAP64(b, a);                        \
+    else                                        \
+        AV_COPY64(b, a);
+
+    if (deblock_top) {
+        if (deblock_topleft) {
+            XCHG(top_border_m1 + (8 << pixel_shift),
+                 src_y - (7 << pixel_shift), 1);
+        }
+        XCHG(top_border + (0 << pixel_shift), src_y + (1 << pixel_shift), xchg);
+        XCHG(top_border + (8 << pixel_shift), src_y + (9 << pixel_shift), 1);
+        if (h->mb_x + 1 < h->mb_width) {
+            XCHG(h->top_borders[top_idx][h->mb_x + 1],
+                 src_y + (17 << pixel_shift), 1);
+        }
+        if (simple || !CONFIG_GRAY || !(h->flags & CODEC_FLAG_GRAY)) {
+            if (chroma444) {
+                if (deblock_topleft) {
+                    XCHG(top_border_m1 + (24 << pixel_shift), src_cb - (7 << pixel_shift), 1);
+                    XCHG(top_border_m1 + (40 << pixel_shift), src_cr - (7 << pixel_shift), 1);
+                }
+                XCHG(top_border + (16 << pixel_shift), src_cb + (1 << pixel_shift), xchg);
+                XCHG(top_border + (24 << pixel_shift), src_cb + (9 << pixel_shift), 1);
+                XCHG(top_border + (32 << pixel_shift), src_cr + (1 << pixel_shift), xchg);
+                XCHG(top_border + (40 << pixel_shift), src_cr + (9 << pixel_shift), 1);
+                if (h->mb_x + 1 < h->mb_width) {
+                    XCHG(h->top_borders[top_idx][h->mb_x + 1] + (16 << pixel_shift), src_cb + (17 << pixel_shift), 1);
+                    XCHG(h->top_borders[top_idx][h->mb_x + 1] + (32 << pixel_shift), src_cr + (17 << pixel_shift), 1);
+                }
+            } else {
+                if (deblock_topleft) {
+                    XCHG(top_border_m1 + (16 << pixel_shift), src_cb - (7 << pixel_shift), 1);
+                    XCHG(top_border_m1 + (24 << pixel_shift), src_cr - (7 << pixel_shift), 1);
+                }
+                XCHG(top_border + (16 << pixel_shift), src_cb + 1 + pixel_shift, 1);
+                XCHG(top_border + (24 << pixel_shift), src_cr + 1 + pixel_shift, 1);
+            }
+        }
+    }
+}
+
+static av_always_inline int dctcoef_get(int16_t *mb, int high_bit_depth,
+                                        int index)
+{
+    if (high_bit_depth) {
+        return AV_RN32A(((int32_t *)mb) + index);
+    } else
+        return AV_RN16A(mb + index);
+}
+
+static av_always_inline void dctcoef_set(int16_t *mb, int high_bit_depth,
+                                         int index, int value)
+{
+    if (high_bit_depth) {
+        AV_WN32A(((int32_t *)mb) + index, value);
+    } else
+        AV_WN16A(mb + index, value);
+}
+
+static av_always_inline void hl_decode_mb_predict_luma(H264Context *h,
+                                                       int mb_type, int is_h264,
+                                                       int simple,
+                                                       int transform_bypass,
+                                                       int pixel_shift,
+                                                       int *block_offset,
+                                                       int linesize,
+                                                       uint8_t *dest_y, int p)
+{
+    void (*idct_add)(uint8_t *dst, int16_t *block, int stride);
+    void (*idct_dc_add)(uint8_t *dst, int16_t *block, int stride);
+    int i;
+    int qscale = p == 0 ? h->qscale : h->chroma_qp[p - 1];
+    block_offset += 16 * p;
+    if (IS_INTRA4x4(mb_type)) {
+        if (IS_8x8DCT(mb_type)) {
+            if (transform_bypass) {
+                idct_dc_add =
+                idct_add    = h->h264dsp.h264_add_pixels8_clear;
+            } else {
+                idct_dc_add = h->h264dsp.h264_idct8_dc_add;
+                idct_add    = h->h264dsp.h264_idct8_add;
+            }
+            for (i = 0; i < 16; i += 4) {
+                uint8_t *const ptr = dest_y + block_offset[i];
+                const int dir      = h->intra4x4_pred_mode_cache[scan8[i]];
+                if (transform_bypass && h->sps.profile_idc == 244 && dir <= 1) {
+                    if (h->x264_build != -1) {
+                        h->hpc.pred8x8l_add[dir](ptr, h->mb + (i * 16 + p * 256 << pixel_shift), linesize);
+                    } else
+                        h->hpc.pred8x8l_filter_add[dir](ptr, h->mb + (i * 16 + p * 256 << pixel_shift),
+                                                        (h-> topleft_samples_available << i) & 0x8000,
+                                                        (h->topright_samples_available << i) & 0x4000, linesize);
+                } else {
+                    const int nnz = h->non_zero_count_cache[scan8[i + p * 16]];
+                    h->hpc.pred8x8l[dir](ptr, (h->topleft_samples_available << i) & 0x8000,
+                                         (h->topright_samples_available << i) & 0x4000, linesize);
+                    if (nnz) {
+                        if (nnz == 1 && dctcoef_get(h->mb, pixel_shift, i * 16 + p * 256))
+                            idct_dc_add(ptr, h->mb + (i * 16 + p * 256 << pixel_shift), linesize);
+                        else
+                            idct_add(ptr, h->mb + (i * 16 + p * 256 << pixel_shift), linesize);
+                    }
+                }
+            }
+        } else {
+            if (transform_bypass) {
+                idct_dc_add  =
+                idct_add     = h->h264dsp.h264_add_pixels4_clear;
+            } else {
+                idct_dc_add = h->h264dsp.h264_idct_dc_add;
+                idct_add    = h->h264dsp.h264_idct_add;
+            }
+            for (i = 0; i < 16; i++) {
+                uint8_t *const ptr = dest_y + block_offset[i];
+                const int dir      = h->intra4x4_pred_mode_cache[scan8[i]];
+
+                if (transform_bypass && h->sps.profile_idc == 244 && dir <= 1) {
+                    h->hpc.pred4x4_add[dir](ptr, h->mb + (i * 16 + p * 256 << pixel_shift), linesize);
+                } else {
+                    uint8_t *topright;
+                    int nnz, tr;
+                    uint64_t tr_high;
+                    if (dir == DIAG_DOWN_LEFT_PRED || dir == VERT_LEFT_PRED) {
+                        const int topright_avail = (h->topright_samples_available << i) & 0x8000;
+                        av_assert2(h->mb_y || linesize <= block_offset[i]);
+                        if (!topright_avail) {
+                            if (pixel_shift) {
+                                tr_high  = ((uint16_t *)ptr)[3 - linesize / 2] * 0x0001000100010001ULL;
+                                topright = (uint8_t *)&tr_high;
+                            } else {
+                                tr       = ptr[3 - linesize] * 0x01010101u;
+                                topright = (uint8_t *)&tr;
+                            }
+                        } else
+                            topright = ptr + (4 << pixel_shift) - linesize;
+                    } else
+                        topright = NULL;
+
+                    h->hpc.pred4x4[dir](ptr, topright, linesize);
+                    nnz = h->non_zero_count_cache[scan8[i + p * 16]];
+                    if (nnz) {
+                        if (is_h264) {
+                            if (nnz == 1 && dctcoef_get(h->mb, pixel_shift, i * 16 + p * 256))
+                                idct_dc_add(ptr, h->mb + (i * 16 + p * 256 << pixel_shift), linesize);
+                            else
+                                idct_add(ptr, h->mb + (i * 16 + p * 256 << pixel_shift), linesize);
+                        } else if (CONFIG_SVQ3_DECODER)
+                            ff_svq3_add_idct_c(ptr, h->mb + i * 16 + p * 256, linesize, qscale, 0);
+                    }
+                }
+            }
+        }
+    } else {
+        h->hpc.pred16x16[h->intra16x16_pred_mode](dest_y, linesize);
+        if (is_h264) {
+            if (h->non_zero_count_cache[scan8[LUMA_DC_BLOCK_INDEX + p]]) {
+                if (!transform_bypass)
+                    h->h264dsp.h264_luma_dc_dequant_idct(h->mb + (p * 256 << pixel_shift),
+                                                         h->mb_luma_dc[p],
+                                                         h->dequant4_coeff[p][qscale][0]);
+                else {
+                    static const uint8_t dc_mapping[16] = {
+                         0 * 16,  1 * 16,  4 * 16,  5 * 16,
+                         2 * 16,  3 * 16,  6 * 16,  7 * 16,
+                         8 * 16,  9 * 16, 12 * 16, 13 * 16,
+                        10 * 16, 11 * 16, 14 * 16, 15 * 16
+                    };
+                    for (i = 0; i < 16; i++)
+                        dctcoef_set(h->mb + (p * 256 << pixel_shift),
+                                    pixel_shift, dc_mapping[i],
+                                    dctcoef_get(h->mb_luma_dc[p],
+                                                pixel_shift, i));
+                }
+            }
+        } else if (CONFIG_SVQ3_DECODER)
+            ff_svq3_luma_dc_dequant_idct_c(h->mb + p * 256,
+                                           h->mb_luma_dc[p], qscale);
+    }
+}
+
+static av_always_inline void hl_decode_mb_idct_luma(H264Context *h, int mb_type,
+                                                    int is_h264, int simple,
+                                                    int transform_bypass,
+                                                    int pixel_shift,
+                                                    int *block_offset,
+                                                    int linesize,
+                                                    uint8_t *dest_y, int p)
+{
+    void (*idct_add)(uint8_t *dst, int16_t *block, int stride);
+    int i;
+    block_offset += 16 * p;
+    if (!IS_INTRA4x4(mb_type)) {
+        if (is_h264) {
+            if (IS_INTRA16x16(mb_type)) {
+                if (transform_bypass) {
+                    if (h->sps.profile_idc == 244 &&
+                        (h->intra16x16_pred_mode == VERT_PRED8x8 ||
+                         h->intra16x16_pred_mode == HOR_PRED8x8)) {
+                        h->hpc.pred16x16_add[h->intra16x16_pred_mode](dest_y, block_offset,
+                                                                      h->mb + (p * 256 << pixel_shift),
+                                                                      linesize);
+                    } else {
+                        for (i = 0; i < 16; i++)
+                            if (h->non_zero_count_cache[scan8[i + p * 16]] ||
+                                dctcoef_get(h->mb, pixel_shift, i * 16 + p * 256))
+                                h->h264dsp.h264_add_pixels4_clear(dest_y + block_offset[i],
+                                                                  h->mb + (i * 16 + p * 256 << pixel_shift),
+                                                                  linesize);
+                    }
+                } else {
+                    h->h264dsp.h264_idct_add16intra(dest_y, block_offset,
+                                                    h->mb + (p * 256 << pixel_shift),
+                                                    linesize,
+                                                    h->non_zero_count_cache + p * 5 * 8);
+                }
+            } else if (h->cbp & 15) {
+                if (transform_bypass) {
+                    const int di = IS_8x8DCT(mb_type) ? 4 : 1;
+                    idct_add = IS_8x8DCT(mb_type) ? h->h264dsp.h264_add_pixels8_clear
+                                                  : h->h264dsp.h264_add_pixels4_clear;
+                    for (i = 0; i < 16; i += di)
+                        if (h->non_zero_count_cache[scan8[i + p * 16]])
+                            idct_add(dest_y + block_offset[i],
+                                     h->mb + (i * 16 + p * 256 << pixel_shift),
+                                     linesize);
+                } else {
+                    if (IS_8x8DCT(mb_type))
+                        h->h264dsp.h264_idct8_add4(dest_y, block_offset,
+                                                   h->mb + (p * 256 << pixel_shift),
+                                                   linesize,
+                                                   h->non_zero_count_cache + p * 5 * 8);
+                    else
+                        h->h264dsp.h264_idct_add16(dest_y, block_offset,
+                                                   h->mb + (p * 256 << pixel_shift),
+                                                   linesize,
+                                                   h->non_zero_count_cache + p * 5 * 8);
+                }
+            }
+        } else if (CONFIG_SVQ3_DECODER) {
+            for (i = 0; i < 16; i++)
+                if (h->non_zero_count_cache[scan8[i + p * 16]] || h->mb[i * 16 + p * 256]) {
+                    // FIXME benchmark weird rule, & below
+                    uint8_t *const ptr = dest_y + block_offset[i];
+                    ff_svq3_add_idct_c(ptr, h->mb + i * 16 + p * 256, linesize,
+                                       h->qscale, IS_INTRA(mb_type) ? 1 : 0);
+                }
+        }
+    }
+}
+
+#define BITS   8
+#define SIMPLE 1
+#include "h264_mb_template.c"
+
+#undef  BITS
+#define BITS   16
+#include "h264_mb_template.c"
+
+#undef  SIMPLE
+#define SIMPLE 0
+#include "h264_mb_template.c"
+
+void ff_h264_hl_decode_mb(H264Context *h)
+{
+    const int mb_xy   = h->mb_xy;
+    const int mb_type = h->cur_pic.mb_type[mb_xy];
+    int is_complex    = CONFIG_SMALL || h->is_complex ||
+                        IS_INTRA_PCM(mb_type) || h->qscale == 0;
+
+    if (CHROMA444(h)) {
+        if (is_complex || h->pixel_shift)
+            hl_decode_mb_444_complex(h);
+        else
+            hl_decode_mb_444_simple_8(h);
+    } else if (is_complex) {
+        hl_decode_mb_complex(h);
+    } else if (h->pixel_shift) {
+        hl_decode_mb_simple_16(h);
+    } else
+        hl_decode_mb_simple_8(h);
+}