libavcodec/vp3_parser.c

   1 /*
   2  * Copyright (C) 2008 Michael Niedermayer
   3  *
   4  * This file is part of Libav.
   5  *
   6  * Libav 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  * Libav 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 Libav; 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 == AV_CODEC_ID_THEORA)
  29         s->pict_type = (buf[0] & 0x40) ? AV_PICTURE_TYPE_P : AV_PICTURE_TYPE_I;
  30     else
  31         s->pict_type = (buf[0] & 0x80) ? AV_PICTURE_TYPE_P : AV_PICTURE_TYPE_I;
  32
  33     *poutbuf      = buf;
  34     *poutbuf_size = buf_size;
  35     return buf_size;
  36 }
  37
  38 AVCodecParser ff_vp3_parser = {
  39     .codec_ids    = {
  40         AV_CODEC_ID_THEORA, AV_CODEC_ID_VP3,
  41         AV_CODEC_ID_VP6, AV_CODEC_ID_VP6F, AV_CODEC_ID_VP6A
  42     },
  43     .parser_parse = parse,
  44 };