libavcodec/vp3_parser.c

   1 /*
   2  * Copyright (C) 2008 Michael Niedermayer
   3  *
   4  * This file is part of FFmpeg.
   5  *
   6  * FFmpeg is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * FFmpeg is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with FFmpeg; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  19  */
  20
  21 #include "parser.h"
  22
  23 static int parse(AVCodecParserContext *s,
  24                            AVCodecContext *avctx,
  25                            const uint8_t **poutbuf, int *poutbuf_size,
  26                            const uint8_t *buf, int buf_size)
  27 {
  28     if(avctx->codec_id == CODEC_ID_THEORA)
  29         s->pict_type= (buf[0]&0x40) ? FF_P_TYPE : FF_I_TYPE;
  30     else
  31         s->pict_type= (buf[0]&0x80) ? FF_P_TYPE : FF_I_TYPE;
  32
  33     *poutbuf = buf;
  34     *poutbuf_size = buf_size;
  35     return buf_size;
  36 }
  37
  38 AVCodecParser vp3_parser = {
  39     { CODEC_ID_THEORA, CODEC_ID_VP3,
  40       CODEC_ID_VP6,    CODEC_ID_VP6F, CODEC_ID_VP6A },
  41     0,
  42     NULL,
  43     parse,
  44 };