Merge remote-tracking branch 'qatar/master'

* qatar/master: (34 commits)
  h264: reset h->ref_count in case of errors in ff_h264_decode_ref_pic_list_reordering()
  error_resilience: fix the check for missing references in ff_er_frame_end() for H264
  4xm: prevent NULL dereference with invalid huffman table
  4xmdemux: prevent use of uninitialized memory
  4xm: clear FF_INPUT_BUFFER_PADDING_SIZE bytes in temporary buffers
  ptx: check for out of bound reads
  tiffdec: fix out of bound reads/writes
  eacmv: check for out of bound reads
  eacmv: fix potential pointer arithmetic overflows
  adpcm: fix out of bound reads due to integer overflow
  anm: prevent infinite loop
  avsdemux: check for out of bound writes
  avs: check for out of bound reads
  avsdemux: check for corrupted data
  AVOptions: refactor set_number/write_number
  AVOptions: cosmetics, rename static av_set_number2() to write_number().
  AVOptions: cosmetics, move and rename static av_set_number().
  AVOptions: split av_set_string3 into opt type-specific functions
  avidec: fix signed overflow in avi_sync()
  mxfdec: Fix some buffer overreads caused by the misuse of AVPacket related functions.
  ...

Conflicts:
	Changelog
	configure
	libavcodec/ptx.c
	libavcodec/ra144.c
	libavcodec/vaapi_vc1.c
	libavcodec/vc1.c
	libavcodec/version.h
	libavformat/4xm.c
	libavformat/avidec.c

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

1 files changed, 558 insertions, 376 deletions

diff --git a/libavcodec/vc1.c b/libavcodec/vc1.c
index 3b3e20e9d3..bc7489d0ab 100644
--- a/libavcodec/vc1.c
+++ b/libavcodec/vc1.c
@@ -1,5 +1,6 @@
 /*
  * VC-1 and WMV3 decoder common code
+ * Copyright (c) 2011 Mashiat Sarker Shakkhar
  * Copyright (c) 2006-2007 Konstantin Shishkov
  * Partly based on vc9.c (c) 2005 Anonymous, Alex Beregszaszi, Michael Niedermayer
  *
@@ -25,6 +26,7 @@
  * VC-1 and WMV3 decoder common code
  *
  */
+
 #include "internal.h"
 #include "dsputil.h"
 #include "avcodec.h"
@@ -66,14 +68,16 @@ enum Imode {
  * @param[in] height Height of this buffer
  * @param[in] stride of this buffer
  */
-static void decode_rowskip(uint8_t* plane, int width, int height, int stride, GetBitContext *gb){
+static void decode_rowskip(uint8_t* plane, int width, int height, int stride,
+                           GetBitContext *gb)
+{
     int x, y;
 
-    for (y=0; y<height; y++){
+    for (y = 0; y < height; y++) {
         if (!get_bits1(gb)) //rowskip
             memset(plane, 0, width);
         else
-            for (x=0; x<width; x++)
+            for (x = 0; x < width; x++)
                 plane[x] = get_bits1(gb);
         plane += stride;
     }
@@ -86,15 +90,17 @@ static void decode_rowskip(uint8_t* plane, int width, int height, int stride, Ge
  * @param[in] stride of this buffer
  * @todo FIXME: Optimize
  */
-static void decode_colskip(uint8_t* plane, int width, int height, int stride, GetBitContext *gb){
+static void decode_colskip(uint8_t* plane, int width, int height, int stride,
+                           GetBitContext *gb)
+{
     int x, y;
 
-    for (x=0; x<width; x++){
+    for (x = 0; x < width; x++) {
         if (!get_bits1(gb)) //colskip
-            for (y=0; y<height; y++)
+            for (y = 0; y < height; y++)
                 plane[y*stride] = 0;
         else
-            for (y=0; y<height; y++)
+            for (y = 0; y < height; y++)
                 plane[y*stride] = get_bits1(gb);
         plane ++;
     }
@@ -115,76 +121,76 @@ static int bitplane_decoding(uint8_t* data, int *raw_flag, VC1Context *v)
     uint8_t invert, *planep = data;
     int width, height, stride;
 
-    width = v->s.mb_width;
-    height = v->s.mb_height;
+    width  = v->s.mb_width;
+    height = v->s.mb_height >> v->field_mode;
     stride = v->s.mb_stride;
     invert = get_bits1(gb);
     imode = get_vlc2(gb, ff_vc1_imode_vlc.table, VC1_IMODE_VLC_BITS, 1);
 
     *raw_flag = 0;
-    switch (imode)
-    {
+    switch (imode) {
     case IMODE_RAW:
         //Data is actually read in the MB layer (same for all tests == "raw")
         *raw_flag = 1; //invert ignored
         return invert;
     case IMODE_DIFF2:
     case IMODE_NORM2:
-        if ((height * width) & 1)
-        {
+        if ((height * width) & 1) {
             *planep++ = get_bits1(gb);
-            offset = 1;
+            offset    = 1;
         }
-        else offset = 0;
+        else
+            offset = 0;
         // decode bitplane as one long line
         for (y = offset; y < height * width; y += 2) {
             code = get_vlc2(gb, ff_vc1_norm2_vlc.table, VC1_NORM2_VLC_BITS, 1);
             *planep++ = code & 1;
             offset++;
-            if(offset == width) {
-                offset = 0;
+            if (offset == width) {
+                offset  = 0;
                 planep += stride - width;
             }
             *planep++ = code >> 1;
             offset++;
-            if(offset == width) {
-                offset = 0;
+            if (offset == width) {
+                offset  = 0;
                 planep += stride - width;
             }
         }
         break;
     case IMODE_DIFF6:
     case IMODE_NORM6:
-        if(!(height % 3) && (width % 3)) { // use 2x3 decoding
-            for(y = 0; y < height; y+= 3) {
-                for(x = width & 1; x < width; x += 2) {
+        if (!(height % 3) && (width % 3)) { // use 2x3 decoding
+            for (y = 0; y < height; y += 3) {
+                for (x = width & 1; x < width; x += 2) {
                     code = get_vlc2(gb, ff_vc1_norm6_vlc.table, VC1_NORM6_VLC_BITS, 2);
-                    if(code < 0){
+                    if (code < 0) {
                         av_log(v->s.avctx, AV_LOG_DEBUG, "invalid NORM-6 VLC\n");
                         return -1;
                     }
-                    planep[x + 0] = (code >> 0) & 1;
-                    planep[x + 1] = (code >> 1) & 1;
-                    planep[x + 0 + stride] = (code >> 2) & 1;
-                    planep[x + 1 + stride] = (code >> 3) & 1;
+                    planep[x + 0]              = (code >> 0) & 1;
+                    planep[x + 1]              = (code >> 1) & 1;
+                    planep[x + 0 + stride]     = (code >> 2) & 1;
+                    planep[x + 1 + stride]     = (code >> 3) & 1;
                     planep[x + 0 + stride * 2] = (code >> 4) & 1;
                     planep[x + 1 + stride * 2] = (code >> 5) & 1;
                 }
                 planep += stride * 3;
             }
-            if(width & 1) decode_colskip(data, 1, height, stride, &v->s.gb);
+            if (width & 1)
+                decode_colskip(data, 1, height, stride, &v->s.gb);
         } else { // 3x2
             planep += (height & 1) * stride;
-            for(y = height & 1; y < height; y += 2) {
-                for(x = width % 3; x < width; x += 3) {
+            for (y = height & 1; y < height; y += 2) {
+                for (x = width % 3; x < width; x += 3) {
                     code = get_vlc2(gb, ff_vc1_norm6_vlc.table, VC1_NORM6_VLC_BITS, 2);
-                    if(code < 0){
+                    if (code < 0) {
                         av_log(v->s.avctx, AV_LOG_DEBUG, "invalid NORM-6 VLC\n");
                         return -1;
                     }
-                    planep[x + 0] = (code >> 0) & 1;
-                    planep[x + 1] = (code >> 1) & 1;
-                    planep[x + 2] = (code >> 2) & 1;
+                    planep[x + 0]          = (code >> 0) & 1;
+                    planep[x + 1]          = (code >> 1) & 1;
+                    planep[x + 2]          = (code >> 2) & 1;
                     planep[x + 0 + stride] = (code >> 3) & 1;
                     planep[x + 1 + stride] = (code >> 4) & 1;
                     planep[x + 2 + stride] = (code >> 5) & 1;
@@ -192,8 +198,10 @@ static int bitplane_decoding(uint8_t* data, int *raw_flag, VC1Context *v)
                 planep += stride * 2;
             }
             x = width % 3;
-            if(x) decode_colskip(data  ,             x, height    , stride, &v->s.gb);
-            if(height & 1) decode_rowskip(data+x, width - x, 1, stride, &v->s.gb);
+            if (x)
+                decode_colskip(data,             x, height, stride, &v->s.gb);
+            if (height & 1)
+                decode_rowskip(data + x, width - x,      1, stride, &v->s.gb);
         }
         break;
     case IMODE_ROWSKIP:
@@ -202,33 +210,30 @@ static int bitplane_decoding(uint8_t* data, int *raw_flag, VC1Context *v)
     case IMODE_COLSKIP:
         decode_colskip(data, width, height, stride, &v->s.gb);
         break;
-    default: break;
+    default:
+        break;
     }
 
     /* Applying diff operator */
-    if (imode == IMODE_DIFF2 || imode == IMODE_DIFF6)
-    {
+    if (imode == IMODE_DIFF2 || imode == IMODE_DIFF6) {
         planep = data;
         planep[0] ^= invert;
-        for (x=1; x<width; x++)
+        for (x = 1; x < width; x++)
             planep[x] ^= planep[x-1];
-        for (y=1; y<height; y++)
-        {
+        for (y = 1; y < height; y++) {
             planep += stride;
             planep[0] ^= planep[-stride];
-            for (x=1; x<width; x++)
-            {
+            for (x = 1; x < width; x++) {
                 if (planep[x-1] != planep[x-stride]) planep[x] ^= invert;
                 else                                 planep[x] ^= planep[x-1];
             }
         }
-    }
-    else if (invert)
-    {
+    } else if (invert) {
         planep = data;
-        for (x=0; x<stride*height; x++) planep[x] = !planep[x]; //FIXME stride
+        for (x = 0; x < stride * height; x++)
+            planep[x] = !planep[x]; //FIXME stride
     }
-    return (imode<<1) + invert;
+    return (imode << 1) + invert;
 }
 
 /** @} */ //Bitplane group
@@ -243,35 +248,34 @@ static int vop_dquant_decoding(VC1Context *v)
     int pqdiff;
 
     //variable size
-    if (v->dquant == 2)
-    {
+    if (v->dquant == 2) {
         pqdiff = get_bits(gb, 3);
-        if (pqdiff == 7) v->altpq = get_bits(gb, 5);
-        else v->altpq = v->pq + pqdiff + 1;
-    }
-    else
-    {
+        if (pqdiff == 7)
+            v->altpq = get_bits(gb, 5);
+        else
+            v->altpq = v->pq + pqdiff + 1;
+    } else {
         v->dquantfrm = get_bits1(gb);
-        if ( v->dquantfrm )
-        {
+        if (v->dquantfrm) {
             v->dqprofile = get_bits(gb, 2);
-            switch (v->dqprofile)
-            {
+            switch (v->dqprofile) {
             case DQPROFILE_SINGLE_EDGE:
             case DQPROFILE_DOUBLE_EDGES:
                 v->dqsbedge = get_bits(gb, 2);
                 break;
             case DQPROFILE_ALL_MBS:
                 v->dqbilevel = get_bits1(gb);
-                if(!v->dqbilevel)
+                if (!v->dqbilevel)
                     v->halfpq = 0;
-            default: break; //Forbidden ?
+            default:
+                break; //Forbidden ?
             }
-            if (v->dqbilevel || v->dqprofile != DQPROFILE_ALL_MBS)
-            {
+            if (v->dqbilevel || v->dqprofile != DQPROFILE_ALL_MBS) {
                 pqdiff = get_bits(gb, 3);
-                if (pqdiff == 7) v->altpq = get_bits(gb, 5);
-                else v->altpq = v->pq + pqdiff + 1;
+                if (pqdiff == 7)
+                    v->altpq = get_bits(gb, 5);
+                else
+                    v->altpq = v->pq + pqdiff + 1;
             }
         }
     }
@@ -291,25 +295,20 @@ int vc1_decode_sequence_header(AVCodecContext *avctx, VC1Context *v, GetBitConte
 {
     av_log(avctx, AV_LOG_DEBUG, "Header: %0X\n", show_bits(gb, 32));
     v->profile = get_bits(gb, 2);
-    if (v->profile == PROFILE_COMPLEX)
-    {
+    if (v->profile == PROFILE_COMPLEX) {
         av_log(avctx, AV_LOG_WARNING, "WMV3 Complex Profile is not fully supported\n");
     }
 
-    if (v->profile == PROFILE_ADVANCED)
-    {
+    if (v->profile == PROFILE_ADVANCED) {
         v->zz_8x4 = ff_vc1_adv_progressive_8x4_zz;
         v->zz_4x8 = ff_vc1_adv_progressive_4x8_zz;
         return decode_sequence_header_adv(v, gb);
-    }
-    else
-    {
+    } else {
         v->zz_8x4 = wmv2_scantableA;
         v->zz_4x8 = wmv2_scantableB;
         v->res_y411   = get_bits1(gb);
         v->res_sprite = get_bits1(gb);
-        if (v->res_y411)
-        {
+        if (v->res_y411) {
             av_log(avctx, AV_LOG_ERROR,
                    "Old interlaced mode is not supported\n");
             return -1;
@@ -320,48 +319,45 @@ int vc1_decode_sequence_header(AVCodecContext *avctx, VC1Context *v, GetBitConte
     v->frmrtq_postproc = get_bits(gb, 3); //common
     // (bitrate-32kbps)/64kbps
     v->bitrtq_postproc = get_bits(gb, 5); //common
-    v->s.loop_filter = get_bits1(gb); //common
-    if(v->s.loop_filter == 1 && v->profile == PROFILE_SIMPLE)
-    {
+    v->s.loop_filter   = get_bits1(gb); //common
+    if (v->s.loop_filter == 1 && v->profile == PROFILE_SIMPLE) {
         av_log(avctx, AV_LOG_ERROR,
                "LOOPFILTER shall not be enabled in Simple Profile\n");
     }
-    if(v->s.avctx->skip_loop_filter >= AVDISCARD_ALL)
+    if (v->s.avctx->skip_loop_filter >= AVDISCARD_ALL)
         v->s.loop_filter = 0;
 
-    v->res_x8 = get_bits1(gb); //reserved
-    v->multires = get_bits1(gb);
-    v->res_fasttx = get_bits1(gb);
-    if (!v->res_fasttx)
-    {
-        v->vc1dsp.vc1_inv_trans_8x8 = ff_simple_idct_8;
-        v->vc1dsp.vc1_inv_trans_8x4 = ff_simple_idct84_add;
-        v->vc1dsp.vc1_inv_trans_4x8 = ff_simple_idct48_add;
-        v->vc1dsp.vc1_inv_trans_4x4 = ff_simple_idct44_add;
+    v->res_x8          = get_bits1(gb); //reserved
+    v->multires        = get_bits1(gb);
+    v->res_fasttx      = get_bits1(gb);
+    if (!v->res_fasttx) {
+        v->vc1dsp.vc1_inv_trans_8x8    = ff_simple_idct_8;
+        v->vc1dsp.vc1_inv_trans_8x4    = ff_simple_idct84_add;
+        v->vc1dsp.vc1_inv_trans_4x8    = ff_simple_idct48_add;
+        v->vc1dsp.vc1_inv_trans_4x4    = ff_simple_idct44_add;
         v->vc1dsp.vc1_inv_trans_8x8_dc = ff_simple_idct_add_8;
         v->vc1dsp.vc1_inv_trans_8x4_dc = ff_simple_idct84_add;
         v->vc1dsp.vc1_inv_trans_4x8_dc = ff_simple_idct48_add;
         v->vc1dsp.vc1_inv_trans_4x4_dc = ff_simple_idct44_add;
     }
 
-    v->fastuvmc =  get_bits1(gb); //common
-    if (!v->profile && !v->fastuvmc)
-    {
+    v->fastuvmc        = get_bits1(gb); //common
+    if (!v->profile && !v->fastuvmc) {
         av_log(avctx, AV_LOG_ERROR,
                "FASTUVMC unavailable in Simple Profile\n");
         return -1;
     }
-    v->extended_mv =  get_bits1(gb); //common
+    v->extended_mv     = get_bits1(gb); //common
     if (!v->profile && v->extended_mv)
     {
         av_log(avctx, AV_LOG_ERROR,
                "Extended MVs unavailable in Simple Profile\n");
         return -1;
     }
-    v->dquant =  get_bits(gb, 2); //common
-    v->vstransform =  get_bits1(gb); //common
+    v->dquant          = get_bits(gb, 2); //common
+    v->vstransform     = get_bits1(gb); //common
 
-    v->res_transtab = get_bits1(gb);
+    v->res_transtab    = get_bits1(gb);
     if (v->res_transtab)
     {
         av_log(avctx, AV_LOG_ERROR,
@@ -369,12 +365,11 @@ int vc1_decode_sequence_header(AVCodecContext *avctx, VC1Context *v, GetBitConte
         return -1;
     }
 
-    v->overlap = get_bits1(gb); //common
+    v->overlap         = get_bits1(gb); //common
 
     v->s.resync_marker = get_bits1(gb);
-    v->rangered = get_bits1(gb);
-    if (v->rangered && v->profile == PROFILE_SIMPLE)
-    {
+    v->rangered        = get_bits1(gb);
+    if (v->rangered && v->profile == PROFILE_SIMPLE) {
         av_log(avctx, AV_LOG_INFO,
                "RANGERED should be set to 0 in Simple Profile\n");
     }
@@ -399,8 +394,7 @@ int vc1_decode_sequence_header(AVCodecContext *avctx, VC1Context *v, GetBitConte
     } else {
         v->res_rtm_flag = get_bits1(gb); //reserved
     }
-    if (!v->res_rtm_flag)
-    {
+    if (!v->res_rtm_flag) {
 //            av_log(avctx, AV_LOG_ERROR,
 //                   "0 for reserved RES_RTM_FLAG is forbidden\n");
         av_log(avctx, AV_LOG_ERROR,
@@ -408,17 +402,17 @@ int vc1_decode_sequence_header(AVCodecContext *avctx, VC1Context *v, GetBitConte
         //return -1;
     }
     //TODO: figure out what they mean (always 0x402F)
-    if(!v->res_fasttx) skip_bits(gb, 16);
+    if (!v->res_fasttx)
+        skip_bits(gb, 16);
     av_log(avctx, AV_LOG_DEBUG,
-               "Profile %i:\nfrmrtq_postproc=%i, bitrtq_postproc=%i\n"
-               "LoopFilter=%i, MultiRes=%i, FastUVMC=%i, Extended MV=%i\n"
-               "Rangered=%i, VSTransform=%i, Overlap=%i, SyncMarker=%i\n"
-               "DQuant=%i, Quantizer mode=%i, Max B frames=%i\n",
-               v->profile, v->frmrtq_postproc, v->bitrtq_postproc,
-               v->s.loop_filter, v->multires, v->fastuvmc, v->extended_mv,
-               v->rangered, v->vstransform, v->overlap, v->s.resync_marker,
-               v->dquant, v->quantizer_mode, avctx->max_b_frames
-               );
+           "Profile %i:\nfrmrtq_postproc=%i, bitrtq_postproc=%i\n"
+           "LoopFilter=%i, MultiRes=%i, FastUVMC=%i, Extended MV=%i\n"
+           "Rangered=%i, VSTransform=%i, Overlap=%i, SyncMarker=%i\n"
+           "DQuant=%i, Quantizer mode=%i, Max B frames=%i\n",
+           v->profile, v->frmrtq_postproc, v->bitrtq_postproc,
+           v->s.loop_filter, v->multires, v->fastuvmc, v->extended_mv,
+           v->rangered, v->vstransform, v->overlap, v->s.resync_marker,
+           v->dquant, v->quantizer_mode, avctx->max_b_frames);
     return 0;
 }
 
@@ -427,59 +421,56 @@ static int decode_sequence_header_adv(VC1Context *v, GetBitContext *gb)
     int w, h;
     v->res_rtm_flag = 1;
     v->level = get_bits(gb, 3);
-    if(v->level >= 5)
-    {
+    if (v->level >= 5) {
         av_log(v->s.avctx, AV_LOG_ERROR, "Reserved LEVEL %i\n",v->level);
     }
     v->chromaformat = get_bits(gb, 2);
-    if (v->chromaformat != 1)
-    {
+    if (v->chromaformat != 1) {
         av_log(v->s.avctx, AV_LOG_ERROR,
                "Only 4:2:0 chroma format supported\n");
         return -1;
     }
 
     // (fps-2)/4 (->30)
-    v->frmrtq_postproc = get_bits(gb, 3); //common
+    v->frmrtq_postproc       = get_bits(gb, 3); //common
     // (bitrate-32kbps)/64kbps
-    v->bitrtq_postproc = get_bits(gb, 5); //common
-    v->postprocflag = get_bits1(gb); //common
+    v->bitrtq_postproc       = get_bits(gb, 5); //common
+    v->postprocflag          = get_bits1(gb);   //common
 
     w = (get_bits(gb, 12) + 1) << 1;
     h = (get_bits(gb, 12) + 1) << 1;
     avcodec_set_dimensions(v->s.avctx, w, h);
-    v->broadcast = get_bits1(gb);
-    v->interlace = get_bits1(gb);
-    v->tfcntrflag = get_bits1(gb);
-    v->finterpflag = get_bits1(gb);
+    v->broadcast             = get_bits1(gb);
+    v->interlace             = get_bits1(gb);
+    v->tfcntrflag            = get_bits1(gb);
+    v->finterpflag           = get_bits1(gb);
     skip_bits1(gb); // reserved
 
     av_log(v->s.avctx, AV_LOG_DEBUG,
-               "Advanced Profile level %i:\nfrmrtq_postproc=%i, bitrtq_postproc=%i\n"
-               "LoopFilter=%i, ChromaFormat=%i, Pulldown=%i, Interlace: %i\n"
-               "TFCTRflag=%i, FINTERPflag=%i\n",
-               v->level, v->frmrtq_postproc, v->bitrtq_postproc,
-               v->s.loop_filter, v->chromaformat, v->broadcast, v->interlace,
-               v->tfcntrflag, v->finterpflag
-               );
+           "Advanced Profile level %i:\nfrmrtq_postproc=%i, bitrtq_postproc=%i\n"
+           "LoopFilter=%i, ChromaFormat=%i, Pulldown=%i, Interlace: %i\n"
+           "TFCTRflag=%i, FINTERPflag=%i\n",
+           v->level, v->frmrtq_postproc, v->bitrtq_postproc,
+           v->s.loop_filter, v->chromaformat, v->broadcast, v->interlace,
+           v->tfcntrflag, v->finterpflag);
 
     v->psf = get_bits1(gb);
-    if(v->psf) { //PsF, 6.1.13
+    if (v->psf) { //PsF, 6.1.13
         av_log(v->s.avctx, AV_LOG_ERROR, "Progressive Segmented Frame mode: not supported (yet)\n");
         return -1;
     }
     v->s.max_b_frames = v->s.avctx->max_b_frames = 7;
-    if(get_bits1(gb)) { //Display Info - decoding is not affected by it
+    if (get_bits1(gb)) { //Display Info - decoding is not affected by it
         int w, h, ar = 0;
         av_log(v->s.avctx, AV_LOG_DEBUG, "Display extended info:\n");
         w = get_bits(gb, 14) + 1;
         h = get_bits(gb, 14) + 1;
         av_log(v->s.avctx, AV_LOG_DEBUG, "Display dimensions: %ix%i\n", w, h);
-        if(get_bits1(gb))
+        if (get_bits1(gb))
             ar = get_bits(gb, 4);
-        if(ar && ar < 14){
+        if (ar && ar < 14) {
             v->s.avctx->sample_aspect_ratio = ff_vc1_pixel_aspect[ar];
-        }else if(ar == 15){
+        } else if (ar == 15) {
             w = get_bits(gb, 8) + 1;
             h = get_bits(gb, 8) + 1;
             v->s.avctx->sample_aspect_ratio = (AVRational){w, h};
@@ -488,43 +479,45 @@ static int decode_sequence_header_adv(VC1Context *v, GetBitContext *gb)
                       &v->s.avctx->sample_aspect_ratio.den,
                       v->s.avctx->height * w,
                       v->s.avctx->width * h,
-                      1<<30);
+                      1 << 30);
         }
-        av_log(v->s.avctx, AV_LOG_DEBUG, "Aspect: %i:%i\n", v->s.avctx->sample_aspect_ratio.num, v->s.avctx->sample_aspect_ratio.den);
+        av_log(v->s.avctx, AV_LOG_DEBUG, "Aspect: %i:%i\n",
+               v->s.avctx->sample_aspect_ratio.num,
+               v->s.avctx->sample_aspect_ratio.den);
 
-        if(get_bits1(gb)){ //framerate stuff
-            if(get_bits1(gb)) {
+        if (get_bits1(gb)) { //framerate stuff
+            if (get_bits1(gb)) {
                 v->s.avctx->time_base.num = 32;
                 v->s.avctx->time_base.den = get_bits(gb, 16) + 1;
             } else {
                 int nr, dr;
                 nr = get_bits(gb, 8);
                 dr = get_bits(gb, 4);
-                if(nr && nr < 8 && dr && dr < 3){
+                if (nr && nr < 8 && dr && dr < 3) {
                     v->s.avctx->time_base.num = ff_vc1_fps_dr[dr - 1];
                     v->s.avctx->time_base.den = ff_vc1_fps_nr[nr - 1] * 1000;
                 }
             }
-            if(v->broadcast) { // Pulldown may be present
-                v->s.avctx->time_base.den *= 2;
+            if (v->broadcast) { // Pulldown may be present
+                v->s.avctx->time_base.den  *= 2;
                 v->s.avctx->ticks_per_frame = 2;
             }
         }
 
-        if(get_bits1(gb)){
-            v->color_prim = get_bits(gb, 8);
+        if (get_bits1(gb)) {
+            v->color_prim    = get_bits(gb, 8);
             v->transfer_char = get_bits(gb, 8);
-            v->matrix_coef = get_bits(gb, 8);
+            v->matrix_coef   = get_bits(gb, 8);
         }
     }
 
     v->hrd_param_flag = get_bits1(gb);
-    if(v->hrd_param_flag) {
+    if (v->hrd_param_flag) {
         int i;
         v->hrd_num_leaky_buckets = get_bits(gb, 5);
         skip_bits(gb, 4); //bitrate exponent
         skip_bits(gb, 4); //buffer size exponent
-        for(i = 0; i < v->hrd_num_leaky_buckets; i++) {
+        for (i = 0; i < v->hrd_num_leaky_buckets; i++) {
             skip_bits(gb, 16); //hrd_rate[n]
             skip_bits(gb, 16); //hrd_buffer[n]
         }
@@ -537,20 +530,20 @@ int vc1_decode_entry_point(AVCodecContext *avctx, VC1Context *v, GetBitContext *
     int i;
 
     av_log(avctx, AV_LOG_DEBUG, "Entry point: %08X\n", show_bits_long(gb, 32));
-    v->broken_link = get_bits1(gb);
-    v->closed_entry = get_bits1(gb);
-    v->panscanflag = get_bits1(gb);
-    v->refdist_flag = get_bits1(gb);
-    v->s.loop_filter = get_bits1(gb);
-    v->fastuvmc = get_bits1(gb);
-    v->extended_mv = get_bits1(gb);
-    v->dquant = get_bits(gb, 2);
-    v->vstransform = get_bits1(gb);
-    v->overlap = get_bits1(gb);
+    v->broken_link    = get_bits1(gb);
+    v->closed_entry   = get_bits1(gb);
+    v->panscanflag    = get_bits1(gb);
+    v->refdist_flag   = get_bits1(gb);
+    v->s.loop_filter  = get_bits1(gb);
+    v->fastuvmc       = get_bits1(gb);
+    v->extended_mv    = get_bits1(gb);
+    v->dquant         = get_bits(gb, 2);
+    v->vstransform    = get_bits1(gb);
+    v->overlap        = get_bits1(gb);
     v->quantizer_mode = get_bits(gb, 2);
 
-    if(v->hrd_param_flag){
-        for(i = 0; i < v->hrd_num_leaky_buckets; i++) {
+    if (v->hrd_param_flag) {
+        for (i = 0; i < v->hrd_num_leaky_buckets; i++) {
             skip_bits(gb, 8); //hrd_full[n]
         }
     }
@@ -560,23 +553,23 @@ int vc1_decode_entry_point(AVCodecContext *avctx, VC1Context *v, GetBitContext *
         int h = (get_bits(gb, 12)+1)<<1;
         avcodec_set_dimensions(avctx, w, h);
     }
-    if(v->extended_mv)
+    if (v->extended_mv)
         v->extended_dmv = get_bits1(gb);
-    if((v->range_mapy_flag = get_bits1(gb))) {
+    if ((v->range_mapy_flag = get_bits1(gb))) {
         av_log(avctx, AV_LOG_ERROR, "Luma scaling is not supported, expect wrong picture\n");
         v->range_mapy = get_bits(gb, 3);
     }
-    if((v->range_mapuv_flag = get_bits1(gb))) {
+    if ((v->range_mapuv_flag = get_bits1(gb))) {
         av_log(avctx, AV_LOG_ERROR, "Chroma scaling is not supported, expect wrong picture\n");
         v->range_mapuv = get_bits(gb, 3);
     }
 
     av_log(avctx, AV_LOG_DEBUG, "Entry point info:\n"
-        "BrokenLink=%i, ClosedEntry=%i, PanscanFlag=%i\n"
-        "RefDist=%i, Postproc=%i, FastUVMC=%i, ExtMV=%i\n"
-        "DQuant=%i, VSTransform=%i, Overlap=%i, Qmode=%i\n",
-        v->broken_link, v->closed_entry, v->panscanflag, v->refdist_flag, v->s.loop_filter,
-        v->fastuvmc, v->extended_mv, v->dquant, v->vstransform, v->overlap, v->quantizer_mode);
+           "BrokenLink=%i, ClosedEntry=%i, PanscanFlag=%i\n"
+           "RefDist=%i, Postproc=%i, FastUVMC=%i, ExtMV=%i\n"
+           "DQuant=%i, VSTransform=%i, Overlap=%i, Qmode=%i\n",
+           v->broken_link, v->closed_entry, v->panscanflag, v->refdist_flag, v->s.loop_filter,
+           v->fastuvmc, v->extended_mv, v->dquant, v->vstransform, v->overlap, v->quantizer_mode);
 
     return 0;
 }
@@ -585,41 +578,48 @@ int vc1_parse_frame_header(VC1Context *v, GetBitContext* gb)
 {
     int pqindex, lowquant, status;
 
-    if(v->finterpflag) v->interpfrm = get_bits1(gb);
+    if (v->finterpflag)
+        v->interpfrm = get_bits1(gb);
     skip_bits(gb, 2); //framecnt unused
     v->rangeredfrm = 0;
-    if (v->rangered) v->rangeredfrm = get_bits1(gb);
+    if (v->rangered)
+        v->rangeredfrm = get_bits1(gb);
     v->s.pict_type = get_bits1(gb);
     if (v->s.avctx->max_b_frames) {
         if (!v->s.pict_type) {
-            if (get_bits1(gb)) v->s.pict_type = AV_PICTURE_TYPE_I;
-            else v->s.pict_type = AV_PICTURE_TYPE_B;
-        } else v->s.pict_type = AV_PICTURE_TYPE_P;
-    } else v->s.pict_type = v->s.pict_type ? AV_PICTURE_TYPE_P : AV_PICTURE_TYPE_I;
+            if (get_bits1(gb))
+                v->s.pict_type = AV_PICTURE_TYPE_I;
+            else
+                v->s.pict_type = AV_PICTURE_TYPE_B;
+        } else
+            v->s.pict_type = AV_PICTURE_TYPE_P;
+    } else
+        v->s.pict_type = v->s.pict_type ? AV_PICTURE_TYPE_P : AV_PICTURE_TYPE_I;
 
     v->bi_type = 0;
-    if(v->s.pict_type == AV_PICTURE_TYPE_B) {
+    if (v->s.pict_type == AV_PICTURE_TYPE_B) {
         v->bfraction_lut_index = get_vlc2(gb, ff_vc1_bfraction_vlc.table, VC1_BFRACTION_VLC_BITS, 1);
-        v->bfraction = ff_vc1_bfraction_lut[v->bfraction_lut_index];
-        if(v->bfraction == 0) {
+        v->bfraction           = ff_vc1_bfraction_lut[v->bfraction_lut_index];
+        if (v->bfraction == 0) {
             v->s.pict_type = AV_PICTURE_TYPE_BI;
         }
     }
-    if(v->s.pict_type == AV_PICTURE_TYPE_I || v->s.pict_type == AV_PICTURE_TYPE_BI)
+    if (v->s.pict_type == AV_PICTURE_TYPE_I || v->s.pict_type == AV_PICTURE_TYPE_BI)
         skip_bits(gb, 7); // skip buffer fullness
 
-    if(v->parse_only)
+    if (v->parse_only)
         return 0;
 
     /* calculate RND */
-    if(v->s.pict_type == AV_PICTURE_TYPE_I || v->s.pict_type == AV_PICTURE_TYPE_BI)
+    if (v->s.pict_type == AV_PICTURE_TYPE_I || v->s.pict_type == AV_PICTURE_TYPE_BI)
         v->rnd = 1;
-    if(v->s.pict_type == AV_PICTURE_TYPE_P)
+    if (v->s.pict_type == AV_PICTURE_TYPE_P)
         v->rnd ^= 1;
 
     /* Quantizer stuff */
     pqindex = get_bits(gb, 5);
-    if(!pqindex) return -1;
+    if (!pqindex)
+        return -1;
     if (v->quantizer_mode == QUANT_FRAME_IMPLICIT)
         v->pq = ff_vc1_pquant_table[0][pqindex];
     else
@@ -631,63 +631,69 @@ int vc1_parse_frame_header(VC1Context *v, GetBitContext* gb)
     if (v->quantizer_mode == QUANT_NON_UNIFORM)
         v->pquantizer = 0;
     v->pqindex = pqindex;
-    if (pqindex < 9) v->halfpq = get_bits1(gb);
-    else v->halfpq = 0;
+    if (pqindex < 9)
+        v->halfpq = get_bits1(gb);
+    else
+        v->halfpq = 0;
     if (v->quantizer_mode == QUANT_FRAME_EXPLICIT)
         v->pquantizer = get_bits1(gb);
     v->dquantfrm = 0;
-    if (v->extended_mv == 1) v->mvrange = get_unary(gb, 0, 3);
+    if (v->extended_mv == 1)
+        v->mvrange = get_unary(gb, 0, 3);
     v->k_x = v->mvrange + 9 + (v->mvrange >> 1); //k_x can be 9 10 12 13
     v->k_y = v->mvrange + 8; //k_y can be 8 9 10 11
     v->range_x = 1 << (v->k_x - 1);
     v->range_y = 1 << (v->k_y - 1);
-    if (v->multires && v->s.pict_type != AV_PICTURE_TYPE_B) v->respic = get_bits(gb, 2);
+    if (v->multires && v->s.pict_type != AV_PICTURE_TYPE_B)
+        v->respic = get_bits(gb, 2);
 
-    if(v->res_x8 && (v->s.pict_type == AV_PICTURE_TYPE_I || v->s.pict_type == AV_PICTURE_TYPE_BI)){
+    if (v->res_x8 && (v->s.pict_type == AV_PICTURE_TYPE_I || v->s.pict_type == AV_PICTURE_TYPE_BI)) {
         v->x8_type = get_bits1(gb);
-    }else v->x8_type = 0;
+    } else
+        v->x8_type = 0;
 //av_log(v->s.avctx, AV_LOG_INFO, "%c Frame: QP=[%i]%i (+%i/2) %i\n",
 //        (v->s.pict_type == AV_PICTURE_TYPE_P) ? 'P' : ((v->s.pict_type == AV_PICTURE_TYPE_I) ? 'I' : 'B'), pqindex, v->pq, v->halfpq, v->rangeredfrm);
 
-    if(v->s.pict_type == AV_PICTURE_TYPE_I || v->s.pict_type == AV_PICTURE_TYPE_P) v->use_ic = 0;
+    if (v->s.pict_type == AV_PICTURE_TYPE_I || v->s.pict_type == AV_PICTURE_TYPE_P)
+        v->use_ic = 0;
 
-    switch(v->s.pict_type) {
+    switch (v->s.pict_type) {
     case AV_PICTURE_TYPE_P:
-        if (v->pq < 5) v->tt_index = 0;
-        else if(v->pq < 13) v->tt_index = 1;
-        else v->tt_index = 2;
+        if (v->pq < 5)       v->tt_index = 0;
+        else if (v->pq < 13) v->tt_index = 1;
+        else                 v->tt_index = 2;
 
         lowquant = (v->pq > 12) ? 0 : 1;
         v->mv_mode = ff_vc1_mv_pmode_table[lowquant][get_unary(gb, 1, 4)];
-        if (v->mv_mode == MV_PMODE_INTENSITY_COMP)
-        {
+        if (v->mv_mode == MV_PMODE_INTENSITY_COMP) {
             int scale, shift, i;
             v->mv_mode2 = ff_vc1_mv_pmode_table2[lowquant][get_unary(gb, 1, 3)];
             v->lumscale = get_bits(gb, 6);
             v->lumshift = get_bits(gb, 6);
-            v->use_ic = 1;
+            v->use_ic   = 1;
             /* fill lookup tables for intensity compensation */
-            if(!v->lumscale) {
+            if (!v->lumscale) {
                 scale = -64;
                 shift = (255 - v->lumshift * 2) << 6;
-                if(v->lumshift > 31)
+                if (v->lumshift > 31)
                     shift += 128 << 6;
             } else {
                 scale = v->lumscale + 32;
-                if(v->lumshift > 31)
+                if (v->lumshift > 31)
                     shift = (v->lumshift - 64) << 6;
                 else
                     shift = v->lumshift << 6;
             }
-            for(i = 0; i < 256; i++) {
-                v->luty[i] = av_clip_uint8((scale * i + shift + 32) >> 6);
+            for (i = 0; i < 256; i++) {
+                v->luty[i]  = av_clip_uint8((scale * i + shift + 32) >> 6);
                 v->lutuv[i] = av_clip_uint8((scale * (i - 128) + 128*64 + 32) >> 6);
             }
         }
-        if(v->mv_mode == MV_PMODE_1MV_HPEL || v->mv_mode == MV_PMODE_1MV_HPEL_BILIN)
+        v->qs_last = v->s.quarter_sample;
+        if (v->mv_mode == MV_PMODE_1MV_HPEL || v->mv_mode == MV_PMODE_1MV_HPEL_BILIN)
             v->s.quarter_sample = 0;
-        else if(v->mv_mode == MV_PMODE_INTENSITY_COMP) {
-            if(v->mv_mode2 == MV_PMODE_1MV_HPEL || v->mv_mode2 == MV_PMODE_1MV_HPEL_BILIN)
+        else if (v->mv_mode == MV_PMODE_INTENSITY_COMP) {
+            if (v->mv_mode2 == MV_PMODE_1MV_HPEL || v->mv_mode2 == MV_PMODE_1MV_HPEL_BILIN)
                 v->s.quarter_sample = 0;
             else
                 v->s.quarter_sample = 1;
@@ -695,12 +701,12 @@ int vc1_parse_frame_header(VC1Context *v, GetBitContext* gb)
             v->s.quarter_sample = 1;
         v->s.mspel = !(v->mv_mode == MV_PMODE_1MV_HPEL_BILIN || (v->mv_mode == MV_PMODE_INTENSITY_COMP && v->mv_mode2 == MV_PMODE_1MV_HPEL_BILIN));
 
-        if ((v->mv_mode == MV_PMODE_INTENSITY_COMP &&
-                 v->mv_mode2 == MV_PMODE_MIXED_MV)
-                || v->mv_mode == MV_PMODE_MIXED_MV)
-        {
+        if ((v->mv_mode  == MV_PMODE_INTENSITY_COMP &&
+             v->mv_mode2 == MV_PMODE_MIXED_MV)      ||
+            v->mv_mode   == MV_PMODE_MIXED_MV) {
             status = bitplane_decoding(v->mv_type_mb_plane, &v->mv_type_is_raw, v);
-            if (status < 0) return -1;
+            if (status < 0)
+                return -1;
             av_log(v->s.avctx, AV_LOG_DEBUG, "MB MV Type plane encoding: "
                    "Imode: %i, Invert: %i\n", status>>1, status&1);
         } else {
@@ -708,7 +714,8 @@ int vc1_parse_frame_header(VC1Context *v, GetBitContext* gb)
             memset(v->mv_type_mb_plane, 0, v->s.mb_stride * v->s.mb_height);
         }
         status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);
-        if (status < 0) return -1;
+        if (status < 0)
+            return -1;
         av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "
                "Imode: %i, Invert: %i\n", status>>1, status&1);
 
@@ -716,18 +723,15 @@ int vc1_parse_frame_header(VC1Context *v, GetBitContext* gb)
         v->s.mv_table_index = get_bits(gb, 2); //but using ff_vc1_ tables
         v->cbpcy_vlc = &ff_vc1_cbpcy_p_vlc[get_bits(gb, 2)];
 
-        if (v->dquant)
-        {
+        if (v->dquant) {
             av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");
             vop_dquant_decoding(v);
         }
 
         v->ttfrm = 0; //FIXME Is that so ?
-        if (v->vstransform)
-        {
+        if (v->vstransform) {
             v->ttmbf = get_bits1(gb);
-            if (v->ttmbf)
-            {
+            if (v->ttmbf) {
                 v->ttfrm = ff_vc1_ttfrm_to_tt[get_bits(gb, 2)];
             }
         } else {
@@ -736,38 +740,38 @@ int vc1_parse_frame_header(VC1Context *v, GetBitContext* gb)
         }
         break;
     case AV_PICTURE_TYPE_B:
-        if (v->pq < 5) v->tt_index = 0;
-        else if(v->pq < 13) v->tt_index = 1;
-        else v->tt_index = 2;
+        if (v->pq < 5)       v->tt_index = 0;
+        else if (v->pq < 13) v->tt_index = 1;
+        else                 v->tt_index = 2;
 
-        v->mv_mode = get_bits1(gb) ? MV_PMODE_1MV : MV_PMODE_1MV_HPEL_BILIN;
+        v->mv_mode          = get_bits1(gb) ? MV_PMODE_1MV : MV_PMODE_1MV_HPEL_BILIN;
+        v->qs_last          = v->s.quarter_sample;
         v->s.quarter_sample = (v->mv_mode == MV_PMODE_1MV);
-        v->s.mspel = v->s.quarter_sample;
+        v->s.mspel          = v->s.quarter_sample;
 
         status = bitplane_decoding(v->direct_mb_plane, &v->dmb_is_raw, v);
-        if (status < 0) return -1;
+        if (status < 0)
+            return -1;
         av_log(v->s.avctx, AV_LOG_DEBUG, "MB Direct Type plane encoding: "
                "Imode: %i, Invert: %i\n", status>>1, status&1);
         status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);
-        if (status < 0) return -1;
+        if (status < 0)
+            return -1;
         av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "
                "Imode: %i, Invert: %i\n", status>>1, status&1);
 
         v->s.mv_table_index = get_bits(gb, 2);
-        v->cbpcy_vlc = &ff_vc1_cbpcy_p_vlc[get_bits(gb, 2)];
+        v->cbpcy_vlc        = &ff_vc1_cbpcy_p_vlc[get_bits(gb, 2)];
 
-        if (v->dquant)
-        {
+        if (v->dquant) {
             av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");
             vop_dquant_decoding(v);
         }
 
         v->ttfrm = 0;
-        if (v->vstransform)
-        {
+        if (v->vstransform) {
             v->ttmbf = get_bits1(gb);
-            if (v->ttmbf)
-            {
+            if (v->ttmbf) {
                 v->ttfrm = ff_vc1_ttfrm_to_tt[get_bits(gb, 2)];
             }
         } else {
@@ -777,88 +781,154 @@ int vc1_parse_frame_header(VC1Context *v, GetBitContext* gb)
         break;
     }
 
-    if(!v->x8_type)
-    {
+    if (!v->x8_type) {
         /* AC Syntax */
         v->c_ac_table_index = decode012(gb);
-        if (v->s.pict_type == AV_PICTURE_TYPE_I || v->s.pict_type == AV_PICTURE_TYPE_BI)
-        {
+        if (v->s.pict_type == AV_PICTURE_TYPE_I || v->s.pict_type == AV_PICTURE_TYPE_BI) {
             v->y_ac_table_index = decode012(gb);
         }
         /* DC Syntax */
         v->s.dc_table_index = get_bits1(gb);
     }
 
-    if(v->s.pict_type == AV_PICTURE_TYPE_BI) {
+    if (v->s.pict_type == AV_PICTURE_TYPE_BI) {
         v->s.pict_type = AV_PICTURE_TYPE_B;
-        v->bi_type = 1;
+        v->bi_type     = 1;
     }
     return 0;
 }
 
+/* fill lookup tables for intensity compensation */
+#define INIT_LUT(lumscale, lumshift, luty, lutuv)   \
+    if (!lumscale) {                                \
+        scale = -64;                                \
+        shift = (255 - lumshift * 2) << 6;          \
+        if (lumshift > 31)                          \
+            shift += 128 << 6;                      \
+    } else {                                        \
+        scale = lumscale + 32;                      \
+        if (lumshift > 31)                          \
+            shift = (lumshift - 64) << 6;           \
+        else                                        \
+            shift = lumshift << 6;                  \
+    }                                               \
+    for (i = 0; i < 256; i++) {                     \
+        luty[i]  = av_clip_uint8((scale * i + shift + 32) >> 6);           \
+        lutuv[i] = av_clip_uint8((scale * (i - 128) + 128*64 + 32) >> 6);  \
+    }
+
 int vc1_parse_frame_header_adv(VC1Context *v, GetBitContext* gb)
 {
     int pqindex, lowquant;
     int status;
+    int mbmodetab, imvtab, icbptab, twomvbptab, fourmvbptab; /* useful only for debugging */
+    int scale, shift, i; /* for initializing LUT for intensity compensation */
 
+    v->numref=0;
     v->p_frame_skipped = 0;
+    if (v->second_field) {
+        v->s.pict_type = (v->fptype & 1) ? AV_PICTURE_TYPE_P : AV_PICTURE_TYPE_I;
+        if (v->fptype & 4)
+            v->s.pict_type = (v->fptype & 1) ? AV_PICTURE_TYPE_BI : AV_PICTURE_TYPE_B;
+        v->s.current_picture_ptr->f.pict_type = v->s.pict_type;
+        if (!v->pic_header_flag)
+            goto parse_common_info;
+    }
 
-    if(v->interlace){
+    if (v->interlace) {
         v->fcm = decode012(gb);
-        if(v->fcm){
-            if(!v->warn_interlaced++)
-                av_log(v->s.avctx, AV_LOG_ERROR, "Interlaced frames/fields support is not implemented\n");
-            return -1;
+        if (v->fcm) {
+            if (v->fcm == 2)
+                v->field_mode = 1;
+            else
+                v->field_mode = 0;
+            if (!v->warn_interlaced++)
+                av_log(v->s.avctx, AV_LOG_ERROR,
+                       "Interlaced frames/fields support is incomplete\n");
         }
     }
-    switch(get_unary(gb, 0, 4)) {
-    case 0:
-        v->s.pict_type = AV_PICTURE_TYPE_P;
-        break;
-    case 1:
-        v->s.pict_type = AV_PICTURE_TYPE_B;
-        break;
-    case 2:
-        v->s.pict_type = AV_PICTURE_TYPE_I;
-        break;
-    case 3:
-        v->s.pict_type = AV_PICTURE_TYPE_BI;
-        break;
-    case 4:
-        v->s.pict_type = AV_PICTURE_TYPE_P; // skipped pic
-        v->p_frame_skipped = 1;
-        break;
+
+    if (v->field_mode) {
+        v->fptype = get_bits(gb, 3);
+        v->s.pict_type = (v->fptype & 2) ? AV_PICTURE_TYPE_P : AV_PICTURE_TYPE_I;
+        if (v->fptype & 4) // B-picture
+            v->s.pict_type = (v->fptype & 2) ? AV_PICTURE_TYPE_BI : AV_PICTURE_TYPE_B;
+    } else {
+        switch (get_unary(gb, 0, 4)) {
+        case 0:
+            v->s.pict_type = AV_PICTURE_TYPE_P;
+            break;
+        case 1:
+            v->s.pict_type = AV_PICTURE_TYPE_B;
+            break;
+        case 2:
+            v->s.pict_type = AV_PICTURE_TYPE_I;
+            break;
+        case 3:
+            v->s.pict_type = AV_PICTURE_TYPE_BI;
+            break;
+        case 4:
+            v->s.pict_type = AV_PICTURE_TYPE_P; // skipped pic
+            v->p_frame_skipped = 1;
+            break;
+        }
     }
-    if(v->tfcntrflag)
+    if (v->tfcntrflag)
         skip_bits(gb, 8);
-    if(v->broadcast) {
-        if(!v->interlace || v->psf) {
+    if (v->broadcast) {
+        if (!v->interlace || v->psf) {
             v->rptfrm = get_bits(gb, 2);
         } else {
             v->tff = get_bits1(gb);
             v->rff = get_bits1(gb);
         }
     }
-    if(v->panscanflag) {
+    if (v->panscanflag) {
         av_log_missing_feature(v->s.avctx, "Pan-scan", 0);
         //...
     }
-    if(v->p_frame_skipped) {
+    if (v->p_frame_skipped) {
         return 0;
     }
     v->rnd = get_bits1(gb);
-    if(v->interlace)
+    if (v->interlace)
         v->uvsamp = get_bits1(gb);
-    if(v->finterpflag) v->interpfrm = get_bits1(gb);
-    if(v->s.pict_type == AV_PICTURE_TYPE_B) {
+    if (v->field_mode) {
+        if (!v->refdist_flag)
+            v->refdist = 0;
+        else {
+            if ((v->s.pict_type != AV_PICTURE_TYPE_B)
+                && (v->s.pict_type != AV_PICTURE_TYPE_BI)) {
+                v->refdist = get_bits(gb, 2);
+                if (v->refdist == 3)
+                    v->refdist += get_unary(gb, 0, 16);
+            } else {
+                v->bfraction_lut_index = get_vlc2(gb, ff_vc1_bfraction_vlc.table, VC1_BFRACTION_VLC_BITS, 1);
+                v->bfraction           = ff_vc1_bfraction_lut[v->bfraction_lut_index];
+                v->frfd = (v->bfraction * v->refdist) >> 8;
+                v->brfd = v->refdist - v->frfd - 1;
+                if (v->brfd < 0)
+                    v->brfd = 0;
+            }
+        }
+        goto parse_common_info;
+    }
+    if (v->finterpflag)
+        v->interpfrm = get_bits1(gb);
+    if (v->s.pict_type == AV_PICTURE_TYPE_B) {
         v->bfraction_lut_index = get_vlc2(gb, ff_vc1_bfraction_vlc.table, VC1_BFRACTION_VLC_BITS, 1);
-        v->bfraction = ff_vc1_bfraction_lut[v->bfraction_lut_index];
-        if(v->bfraction == 0) {
+        v->bfraction           = ff_vc1_bfraction_lut[v->bfraction_lut_index];
+        if (v->bfraction == 0) {
             v->s.pict_type = AV_PICTURE_TYPE_BI; /* XXX: should not happen here */
         }
     }
+
+    parse_common_info:
+    if (v->field_mode)
+        v->cur_field_type = !(v->tff ^ v->second_field);
     pqindex = get_bits(gb, 5);
-    if(!pqindex) return -1;
+    if (!pqindex)
+        return -1;
     v->pqindex = pqindex;
     if (v->quantizer_mode == QUANT_FRAME_IMPLICIT)
         v->pq = ff_vc1_pquant_table[0][pqindex];
@@ -871,118 +941,193 @@ int vc1_parse_frame_header_adv(VC1Context *v, GetBitContext* gb)
     if (v->quantizer_mode == QUANT_NON_UNIFORM)
         v->pquantizer = 0;
     v->pqindex = pqindex;
-    if (pqindex < 9) v->halfpq = get_bits1(gb);
-    else v->halfpq = 0;
+    if (pqindex < 9)
+        v->halfpq = get_bits1(gb);
+    else
+        v->halfpq = 0;
     if (v->quantizer_mode == QUANT_FRAME_EXPLICIT)
         v->pquantizer = get_bits1(gb);
-    if(v->postprocflag)
+    if (v->postprocflag)
         v->postproc = get_bits(gb, 2);
 
-    if(v->s.pict_type == AV_PICTURE_TYPE_I || v->s.pict_type == AV_PICTURE_TYPE_P) v->use_ic = 0;
+    if (v->s.pict_type == AV_PICTURE_TYPE_I || v->s.pict_type == AV_PICTURE_TYPE_P)
+        v->use_ic = 0;
 
-    if(v->parse_only)
+    if (v->parse_only)
         return 0;
 
-    switch(v->s.pict_type) {
+    switch (v->s.pict_type) {
     case AV_PICTURE_TYPE_I:
     case AV_PICTURE_TYPE_BI:
+        if (v->fcm == 1) { //interlace frame picture
+            status = bitplane_decoding(v->fieldtx_plane, &v->fieldtx_is_raw, v);
+            if (status < 0)
+                return -1;
+            av_log(v->s.avctx, AV_LOG_DEBUG, "FIELDTX plane encoding: "
+                   "Imode: %i, Invert: %i\n", status>>1, status&1);
+        }
         status = bitplane_decoding(v->acpred_plane, &v->acpred_is_raw, v);
-        if (status < 0) return -1;
+        if (status < 0)
+            return -1;
         av_log(v->s.avctx, AV_LOG_DEBUG, "ACPRED plane encoding: "
-                "Imode: %i, Invert: %i\n", status>>1, status&1);
+               "Imode: %i, Invert: %i\n", status>>1, status&1);
         v->condover = CONDOVER_NONE;
-        if(v->overlap && v->pq <= 8) {
+        if (v->overlap && v->pq <= 8) {
             v->condover = decode012(gb);
-            if(v->condover == CONDOVER_SELECT) {
+            if (v->condover == CONDOVER_SELECT) {
                 status = bitplane_decoding(v->over_flags_plane, &v->overflg_is_raw, v);
-                if (status < 0) return -1;
+                if (status < 0)
+                    return -1;
                 av_log(v->s.avctx, AV_LOG_DEBUG, "CONDOVER plane encoding: "
-                        "Imode: %i, Invert: %i\n", status>>1, status&1);
+                       "Imode: %i, Invert: %i\n", status>>1, status&1);
             }
         }
         break;
     case AV_PICTURE_TYPE_P:
-        if (v->extended_mv) v->mvrange = get_unary(gb, 0, 3);
-        else v->mvrange = 0;
+        if (v->field_mode) {
+            v->numref = get_bits1(gb);
+            if (!v->numref) {
+                v->reffield          = get_bits1(gb);
+                v->ref_field_type[0] = v->reffield ^ !v->cur_field_type;
+            }
+        }
+        if (v->extended_mv)
+            v->mvrange = get_unary(gb, 0, 3);
+        else
+            v->mvrange = 0;
+        if (v->interlace) {
+            if (v->extended_dmv)
+                v->dmvrange = get_unary(gb, 0, 3);
+            else
+                v->dmvrange = 0;
+            if (v->fcm == 1) { // interlaced frame picture
+                v->fourmvswitch = get_bits1(gb);
+                v->intcomp      = get_bits1(gb);
+                if (v->intcomp) {
+                    v->lumscale = get_bits(gb, 6);
+                    v->lumshift = get_bits(gb, 6);
+                    INIT_LUT(v->lumscale, v->lumshift, v->luty, v->lutuv);
+                }
+                status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);
+                av_log(v->s.avctx, AV_LOG_DEBUG, "SKIPMB plane encoding: "
+                       "Imode: %i, Invert: %i\n", status>>1, status&1);
+                mbmodetab = get_bits(gb, 2);
+                if (v->fourmvswitch)
+                    v->mbmode_vlc = &ff_vc1_intfr_4mv_mbmode_vlc[mbmodetab];
+                else
+                    v->mbmode_vlc = &ff_vc1_intfr_non4mv_mbmode_vlc[mbmodetab];
+                imvtab         = get_bits(gb, 2);
+                v->imv_vlc     = &ff_vc1_1ref_mvdata_vlc[imvtab];
+                // interlaced p-picture cbpcy range is [1, 63]
+                icbptab        = get_bits(gb, 3);
+                v->cbpcy_vlc   = &ff_vc1_icbpcy_vlc[icbptab];
+                twomvbptab     = get_bits(gb, 2);
+                v->twomvbp_vlc = &ff_vc1_2mv_block_pattern_vlc[twomvbptab];
+                if (v->fourmvswitch) {
+                    fourmvbptab     = get_bits(gb, 2);
+                    v->fourmvbp_vlc = &ff_vc1_4mv_block_pattern_vlc[fourmvbptab];
+                }
+            }
+        }
         v->k_x = v->mvrange + 9 + (v->mvrange >> 1); //k_x can be 9 10 12 13
         v->k_y = v->mvrange + 8; //k_y can be 8 9 10 11
         v->range_x = 1 << (v->k_x - 1);
         v->range_y = 1 << (v->k_y - 1);
 
-        if (v->pq < 5) v->tt_index = 0;
-        else if(v->pq < 13) v->tt_index = 1;
-        else v->tt_index = 2;
-
-        lowquant = (v->pq > 12) ? 0 : 1;
-        v->mv_mode = ff_vc1_mv_pmode_table[lowquant][get_unary(gb, 1, 4)];
-        if (v->mv_mode == MV_PMODE_INTENSITY_COMP)
-        {
-            int scale, shift, i;
-            v->mv_mode2 = ff_vc1_mv_pmode_table2[lowquant][get_unary(gb, 1, 3)];
-            v->lumscale = get_bits(gb, 6);
-            v->lumshift = get_bits(gb, 6);
-            /* fill lookup tables for intensity compensation */
-            if(!v->lumscale) {
-                scale = -64;
-                shift = (255 - v->lumshift * 2) << 6;
-                if(v->lumshift > 31)
-                    shift += 128 << 6;
-            } else {
-                scale = v->lumscale + 32;
-                if(v->lumshift > 31)
-                    shift = (v->lumshift - 64) << 6;
-                else
-                    shift = v->lumshift << 6;
-            }
-            for(i = 0; i < 256; i++) {
-                v->luty[i] = av_clip_uint8((scale * i + shift + 32) >> 6);
-                v->lutuv[i] = av_clip_uint8((scale * (i - 128) + 128*64 + 32) >> 6);
+        if (v->pq < 5)
+            v->tt_index = 0;
+        else if (v->pq < 13)
+            v->tt_index = 1;
+        else
+            v->tt_index = 2;
+        if (v->fcm != 1) {
+            int mvmode;
+            mvmode     = get_unary(gb, 1, 4);
+            lowquant   = (v->pq > 12) ? 0 : 1;
+            v->mv_mode = ff_vc1_mv_pmode_table[lowquant][mvmode];
+            if (v->mv_mode == MV_PMODE_INTENSITY_COMP) {
+                int mvmode2;
+                mvmode2 = get_unary(gb, 1, 3);
+                v->mv_mode2 = ff_vc1_mv_pmode_table2[lowquant][mvmode2];
+                if (v->field_mode)
+                    v->intcompfield = decode210(gb);
+                v->lumscale = get_bits(gb, 6);
+                v->lumshift = get_bits(gb, 6);
+                INIT_LUT(v->lumscale, v->lumshift, v->luty, v->lutuv);
+                if ((v->field_mode) && !v->intcompfield) {
+                    v->lumscale2 = get_bits(gb, 6);
+                    v->lumshift2 = get_bits(gb, 6);
+                    INIT_LUT(v->lumscale2, v->lumshift2, v->luty2, v->lutuv2);
+                }
+                v->use_ic = 1;
             }
-            v->use_ic = 1;
-        }
-        if(v->mv_mode == MV_PMODE_1MV_HPEL || v->mv_mode == MV_PMODE_1MV_HPEL_BILIN)
-            v->s.quarter_sample = 0;
-        else if(v->mv_mode == MV_PMODE_INTENSITY_COMP) {
-            if(v->mv_mode2 == MV_PMODE_1MV_HPEL || v->mv_mode2 == MV_PMODE_1MV_HPEL_BILIN)
+            v->qs_last = v->s.quarter_sample;
+            if (v->mv_mode == MV_PMODE_1MV_HPEL || v->mv_mode == MV_PMODE_1MV_HPEL_BILIN)
                 v->s.quarter_sample = 0;
-            else
+            else if (v->mv_mode == MV_PMODE_INTENSITY_COMP) {
+                if (v->mv_mode2 == MV_PMODE_1MV_HPEL || v->mv_mode2 == MV_PMODE_1MV_HPEL_BILIN)
+                    v->s.quarter_sample = 0;
+                else
+                    v->s.quarter_sample = 1;
+            } else
                 v->s.quarter_sample = 1;
-        } else
-            v->s.quarter_sample = 1;
-        v->s.mspel = !(v->mv_mode == MV_PMODE_1MV_HPEL_BILIN || (v->mv_mode == MV_PMODE_INTENSITY_COMP && v->mv_mode2 == MV_PMODE_1MV_HPEL_BILIN));
-
-        if ((v->mv_mode == MV_PMODE_INTENSITY_COMP &&
+            v->s.mspel = !(v->mv_mode == MV_PMODE_1MV_HPEL_BILIN
+                           || (v->mv_mode == MV_PMODE_INTENSITY_COMP
+                               && v->mv_mode2 == MV_PMODE_1MV_HPEL_BILIN));
+        }
+        if (v->fcm == 0) { // progressive
+            if ((v->mv_mode == MV_PMODE_INTENSITY_COMP &&
                  v->mv_mode2 == MV_PMODE_MIXED_MV)
-                || v->mv_mode == MV_PMODE_MIXED_MV)
-        {
-            status = bitplane_decoding(v->mv_type_mb_plane, &v->mv_type_is_raw, v);
-            if (status < 0) return -1;
-            av_log(v->s.avctx, AV_LOG_DEBUG, "MB MV Type plane encoding: "
+                || v->mv_mode == MV_PMODE_MIXED_MV) {
+                status = bitplane_decoding(v->mv_type_mb_plane, &v->mv_type_is_raw, v);
+                if (status < 0)
+                    return -1;
+                av_log(v->s.avctx, AV_LOG_DEBUG, "MB MV Type plane encoding: "
+                       "Imode: %i, Invert: %i\n", status>>1, status&1);
+            } else {
+                v->mv_type_is_raw = 0;
+                memset(v->mv_type_mb_plane, 0, v->s.mb_stride * v->s.mb_height);
+            }
+            status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);
+            if (status < 0)
+                return -1;
+            av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "
                    "Imode: %i, Invert: %i\n", status>>1, status&1);
-        } else {
-            v->mv_type_is_raw = 0;
-            memset(v->mv_type_mb_plane, 0, v->s.mb_stride * v->s.mb_height);
-        }
-        status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);
-        if (status < 0) return -1;
-        av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "
-               "Imode: %i, Invert: %i\n", status>>1, status&1);
 
-        /* Hopefully this is correct for P frames */
-        v->s.mv_table_index = get_bits(gb, 2); //but using ff_vc1_ tables
-        v->cbpcy_vlc = &ff_vc1_cbpcy_p_vlc[get_bits(gb, 2)];
-        if (v->dquant)
-        {
+            /* Hopefully this is correct for P frames */
+            v->s.mv_table_index = get_bits(gb, 2); //but using ff_vc1_ tables
+            v->cbpcy_vlc        = &ff_vc1_cbpcy_p_vlc[get_bits(gb, 2)];
+        } else if (v->fcm == 1) { // frame interlaced
+            v->qs_last          = v->s.quarter_sample;
+            v->s.quarter_sample = 1;
+            v->s.mspel          = 1;
+        } else {    // field interlaced
+            mbmodetab = get_bits(gb, 3);
+            imvtab = get_bits(gb, 2 + v->numref);
+            if (!v->numref)
+                v->imv_vlc = &ff_vc1_1ref_mvdata_vlc[imvtab];
+            else
+                v->imv_vlc = &ff_vc1_2ref_mvdata_vlc[imvtab];
+            icbptab = get_bits(gb, 3);
+            v->cbpcy_vlc = &ff_vc1_icbpcy_vlc[icbptab];
+            if ((v->mv_mode == MV_PMODE_INTENSITY_COMP &&
+                v->mv_mode2 == MV_PMODE_MIXED_MV) || v->mv_mode == MV_PMODE_MIXED_MV) {
+                fourmvbptab     = get_bits(gb, 2);
+                v->fourmvbp_vlc = &ff_vc1_4mv_block_pattern_vlc[fourmvbptab];
+                v->mbmode_vlc = &ff_vc1_if_mmv_mbmode_vlc[mbmodetab];
+            } else {
+                v->mbmode_vlc = &ff_vc1_if_1mv_mbmode_vlc[mbmodetab];
+            }
+        }
+        if (v->dquant) {
             av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");
             vop_dquant_decoding(v);
         }
 
         v->ttfrm = 0; //FIXME Is that so ?
-        if (v->vstransform)
-        {
+        if (v->vstransform) {
             v->ttmbf = get_bits1(gb);
-            if (v->ttmbf)
-            {
+            if (v->ttmbf) {
                 v->ttfrm = ff_vc1_ttfrm_to_tt[get_bits(gb, 2)];
             }
         } else {
@@ -991,45 +1136,82 @@ int vc1_parse_frame_header_adv(VC1Context *v, GetBitContext* gb)
         }
         break;
     case AV_PICTURE_TYPE_B:
-        if (v->extended_mv) v->mvrange = get_unary(gb, 0, 3);
-        else v->mvrange = 0;
-        v->k_x = v->mvrange + 9 + (v->mvrange >> 1); //k_x can be 9 10 12 13
-        v->k_y = v->mvrange + 8; //k_y can be 8 9 10 11
+        // TODO: implement interlaced frame B picture decoding
+        if (v->fcm == 1)
+            return -1;
+        if (v->extended_mv)
+            v->mvrange = get_unary(gb, 0, 3);
+        else
+            v->mvrange = 0;
+        v->k_x     = v->mvrange + 9 + (v->mvrange >> 1); //k_x can be 9 10 12 13
+        v->k_y     = v->mvrange + 8; //k_y can be 8 9 10 11
         v->range_x = 1 << (v->k_x - 1);
         v->range_y = 1 << (v->k_y - 1);
 
-        if (v->pq < 5) v->tt_index = 0;
-        else if(v->pq < 13) v->tt_index = 1;
-        else v->tt_index = 2;
-
-        v->mv_mode = get_bits1(gb) ? MV_PMODE_1MV : MV_PMODE_1MV_HPEL_BILIN;
-        v->s.quarter_sample = (v->mv_mode == MV_PMODE_1MV);
-        v->s.mspel = v->s.quarter_sample;
-
-        status = bitplane_decoding(v->direct_mb_plane, &v->dmb_is_raw, v);
-        if (status < 0) return -1;
-        av_log(v->s.avctx, AV_LOG_DEBUG, "MB Direct Type plane encoding: "
-               "Imode: %i, Invert: %i\n", status>>1, status&1);
-        status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);
-        if (status < 0) return -1;
-        av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "
-               "Imode: %i, Invert: %i\n", status>>1, status&1);
-
-        v->s.mv_table_index = get_bits(gb, 2);
-        v->cbpcy_vlc = &ff_vc1_cbpcy_p_vlc[get_bits(gb, 2)];
+        if (v->pq < 5)
+            v->tt_index = 0;
+        else if (v->pq < 13)
+            v->tt_index = 1;
+        else
+            v->tt_index = 2;
+
+        if (v->field_mode) {
+            int mvmode;
+            if (v->extended_dmv)
+                v->dmvrange = get_unary(gb, 0, 3);
+            mvmode = get_unary(gb, 1, 3);
+            lowquant = (v->pq > 12) ? 0 : 1;
+            v->mv_mode          = ff_vc1_mv_pmode_table2[lowquant][mvmode];
+            v->qs_last          = v->s.quarter_sample;
+            v->s.quarter_sample = (v->mv_mode == MV_PMODE_1MV || v->mv_mode == MV_PMODE_MIXED_MV);
+            v->s.mspel          = !(v->mv_mode == MV_PMODE_1MV_HPEL_BILIN || v->mv_mode == MV_PMODE_1MV_HPEL);
+            status = bitplane_decoding(v->forward_mb_plane, &v->fmb_is_raw, v);
+            if (status < 0)
+                return -1;
+            av_log(v->s.avctx, AV_LOG_DEBUG, "MB Forward Type plane encoding: "
+                   "Imode: %i, Invert: %i\n", status>>1, status&1);
+            mbmodetab = get_bits(gb, 3);
+            if (v->mv_mode == MV_PMODE_MIXED_MV)
+                v->mbmode_vlc = &ff_vc1_if_mmv_mbmode_vlc[mbmodetab];
+            else
+                v->mbmode_vlc = &ff_vc1_if_1mv_mbmode_vlc[mbmodetab];
+            imvtab       = get_bits(gb, 3);
+            v->imv_vlc   = &ff_vc1_2ref_mvdata_vlc[imvtab];
+            icbptab      = get_bits(gb, 3);
+            v->cbpcy_vlc = &ff_vc1_icbpcy_vlc[icbptab];
+            if (v->mv_mode == MV_PMODE_MIXED_MV) {
+                fourmvbptab     = get_bits(gb, 2);
+                v->fourmvbp_vlc = &ff_vc1_4mv_block_pattern_vlc[fourmvbptab];
+            }
+            v->numref = 1; // interlaced field B pictures are always 2-ref
+        } else {
+            v->mv_mode          = get_bits1(gb) ? MV_PMODE_1MV : MV_PMODE_1MV_HPEL_BILIN;
+            v->qs_last          = v->s.quarter_sample;
+            v->s.quarter_sample = (v->mv_mode == MV_PMODE_1MV);
+            v->s.mspel          = v->s.quarter_sample;
+            status              = bitplane_decoding(v->direct_mb_plane, &v->dmb_is_raw, v);
+            if (status < 0)
+                return -1;
+            av_log(v->s.avctx, AV_LOG_DEBUG, "MB Direct Type plane encoding: "
+                   "Imode: %i, Invert: %i\n", status>>1, status&1);
+            status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);
+            if (status < 0)
+                return -1;
+            av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "
+                   "Imode: %i, Invert: %i\n", status>>1, status&1);
+            v->s.mv_table_index = get_bits(gb, 2);
+            v->cbpcy_vlc = &ff_vc1_cbpcy_p_vlc[get_bits(gb, 2)];
+        }
 
-        if (v->dquant)
-        {
+        if (v->dquant) {
             av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");
             vop_dquant_decoding(v);
         }
 
         v->ttfrm = 0;
-        if (v->vstransform)
-        {
+        if (v->vstransform) {
             v->ttmbf = get_bits1(gb);
-            if (v->ttmbf)
-            {
+            if (v->ttmbf) {
                 v->ttfrm = ff_vc1_ttfrm_to_tt[get_bits(gb, 2)];
             }
         } else {
@@ -1041,19 +1223,19 @@ int vc1_parse_frame_header_adv(VC1Context *v, GetBitContext* gb)
 
     /* AC Syntax */
     v->c_ac_table_index = decode012(gb);
-    if (v->s.pict_type == AV_PICTURE_TYPE_I || v->s.pict_type == AV_PICTURE_TYPE_BI)
-    {
+    if (v->s.pict_type == AV_PICTURE_TYPE_I || v->s.pict_type == AV_PICTURE_TYPE_BI) {
         v->y_ac_table_index = decode012(gb);
     }
     /* DC Syntax */
     v->s.dc_table_index = get_bits1(gb);
-    if ((v->s.pict_type == AV_PICTURE_TYPE_I || v->s.pict_type == AV_PICTURE_TYPE_BI) && v->dquant) {
+    if ((v->s.pict_type == AV_PICTURE_TYPE_I || v->s.pict_type == AV_PICTURE_TYPE_BI)
+        && v->dquant) {
         av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");
         vop_dquant_decoding(v);
     }
 
     v->bi_type = 0;
-    if(v->s.pict_type == AV_PICTURE_TYPE_BI) {
+    if (v->s.pict_type == AV_PICTURE_TYPE_BI) {
         v->s.pict_type = AV_PICTURE_TYPE_B;
         v->bi_type = 1;
     }