ffmpeg roll of source to mar 9 version...

patched-ffmpeg-mt/libavcodec/cavsdec.c

 /*
  * Chinese AVS video (AVS1-P2, JiZhun profile) decoder.
  * Copyright (c) 2006  Stefan Gehrer <stefan.gehrer@gmx.de>
  *
  * 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.
@@ skipping 465 matching lines @@
             return -1;
         }
         /* make sure we have the reference frames we need */
         if(!h->DPB[0].data[0] ||
           (!h->DPB[1].data[0] && h->pic_type == FF_B_TYPE))
             return -1;
     } else {
         h->pic_type = FF_I_TYPE;
         if(get_bits1(&s->gb))
             skip_bits(&s->gb,24);//time_code
+        /* old sample clips were all progressive and no low_delay,
+           bump stream revision if detected otherwise */
+        if((s->low_delay) || !(show_bits(&s->gb,9) & 1))
+            h->stream_revision = 1;
+        /* similarly test top_field_first and repeat_first_field */
+        else if(show_bits(&s->gb,11) & 3)
+            h->stream_revision = 1;
+        if(h->stream_revision > 0)
+            skip_bits(&s->gb,1); //marker_bit
     }
     /* release last B frame */
     if(h->picture.data[0])
         s->avctx->release_buffer(s->avctx, (AVFrame *)&h->picture);
 
     s->avctx->get_buffer(s->avctx, (AVFrame *)&h->picture);
     ff_cavs_init_pic(h);
     h->picture.poc = get_bits(&s->gb,8)*2;
 
     /* get temporal distances and MV scaling factors */
@@ skipping 210 matching lines @@
     CODEC_ID_CAVS,
     sizeof(AVSContext),
     ff_cavs_init,
     NULL,
     ff_cavs_end,
     cavs_decode_frame,
     CODEC_CAP_DR1 | CODEC_CAP_DELAY,
     .flush= cavs_flush,
     .long_name= NULL_IF_CONFIG_SMALL("Chinese AVS video (AVS1-P2, JiZhun profile)"),
 };