mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2024-12-25 08:42:39 +00:00
80 lines
2.3 KiB
C
80 lines
2.3 KiB
C
/*
|
|
* 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
|
|
*/
|
|
|
|
#include "libavutil/intreadwrite.h"
|
|
|
|
#include "avcodec.h"
|
|
|
|
static int parse(AVCodecParserContext *s,
|
|
AVCodecContext *avctx,
|
|
const uint8_t **poutbuf, int *poutbuf_size,
|
|
const uint8_t *buf, int buf_size)
|
|
{
|
|
unsigned int frame_type;
|
|
unsigned int profile;
|
|
|
|
*poutbuf = buf;
|
|
*poutbuf_size = buf_size;
|
|
|
|
if (buf_size < 3)
|
|
return buf_size;
|
|
|
|
frame_type = buf[0] & 1;
|
|
profile = (buf[0] >> 1) & 7;
|
|
if (profile > 3) {
|
|
av_log(avctx, AV_LOG_ERROR, "Invalid profile %u.\n", profile);
|
|
return buf_size;
|
|
}
|
|
|
|
avctx->profile = profile;
|
|
s->key_frame = frame_type == 0;
|
|
s->pict_type = frame_type ? AV_PICTURE_TYPE_P : AV_PICTURE_TYPE_I;
|
|
s->format = AV_PIX_FMT_YUV420P;
|
|
s->field_order = AV_FIELD_PROGRESSIVE;
|
|
s->picture_structure = AV_PICTURE_STRUCTURE_FRAME;
|
|
|
|
if (frame_type == 0) {
|
|
unsigned int sync_code;
|
|
unsigned int width, height;
|
|
|
|
if (buf_size < 10)
|
|
return buf_size;
|
|
|
|
sync_code = AV_RL24(buf + 3);
|
|
if (sync_code != 0x2a019d) {
|
|
av_log(avctx, AV_LOG_ERROR, "Invalid sync code %06x.\n", sync_code);
|
|
return buf_size;
|
|
}
|
|
|
|
width = AV_RL16(buf + 6) & 0x3fff;
|
|
height = AV_RL16(buf + 8) & 0x3fff;
|
|
|
|
s->width = width;
|
|
s->height = height;
|
|
s->coded_width = FFALIGN(width, 16);
|
|
s->coded_height = FFALIGN(height, 16);
|
|
}
|
|
|
|
return buf_size;
|
|
}
|
|
|
|
AVCodecParser ff_vp8_parser = {
|
|
.codec_ids = { AV_CODEC_ID_VP8 },
|
|
.parser_parse = parse,
|
|
};
|