mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-11-21 10:55:51 +02:00
bde15e74de
patch by Stefano Sabatini, stefano.sabatini-lala poste.it along with some spelling/consistency fixes for the long names by me Originally committed as revision 13649 to svn://svn.ffmpeg.org/ffmpeg/trunk
113 lines
2.9 KiB
C
113 lines
2.9 KiB
C
/*
|
|
* VC1 Test Bitstreams Format Demuxer
|
|
* Copyright (c) 2006, 2008 Konstantin Shishkov
|
|
*
|
|
* 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
|
|
*/
|
|
|
|
/**
|
|
* @file vc1test.c
|
|
* VC1 test bitstream file demuxer
|
|
* by Konstantin Shishkov
|
|
* Format specified in SMPTE standard 421 Annex L
|
|
*/
|
|
|
|
#include "avformat.h"
|
|
|
|
#define VC1_EXTRADATA_SIZE 4
|
|
|
|
static int vc1t_probe(AVProbeData *p)
|
|
{
|
|
if (p->buf[3] != 0xC5 && AV_RL32(&p->buf[4]) != 4)
|
|
return 0;
|
|
|
|
return AVPROBE_SCORE_MAX/2;
|
|
}
|
|
|
|
static int vc1t_read_header(AVFormatContext *s,
|
|
AVFormatParameters *ap)
|
|
{
|
|
ByteIOContext *pb = s->pb;
|
|
AVStream *st;
|
|
int fps, frames;
|
|
|
|
frames = get_le24(pb);
|
|
if(get_byte(pb) != 0xC5 || get_le32(pb) != 4)
|
|
return -1;
|
|
|
|
/* init video codec */
|
|
st = av_new_stream(s, 0);
|
|
if (!st)
|
|
return -1;
|
|
|
|
st->codec->codec_type = CODEC_TYPE_VIDEO;
|
|
st->codec->codec_id = CODEC_ID_WMV3;
|
|
|
|
st->codec->extradata = av_malloc(VC1_EXTRADATA_SIZE);
|
|
st->codec->extradata_size = VC1_EXTRADATA_SIZE;
|
|
get_buffer(pb, st->codec->extradata, VC1_EXTRADATA_SIZE);
|
|
st->codec->height = get_le32(pb);
|
|
st->codec->width = get_le32(pb);
|
|
if(get_le32(pb) != 0xC)
|
|
return -1;
|
|
url_fskip(pb, 8);
|
|
fps = get_le32(pb);
|
|
if(fps == -1)
|
|
av_set_pts_info(st, 32, 1, 1000);
|
|
else{
|
|
av_set_pts_info(st, 24, 1, fps);
|
|
st->duration = frames;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int vc1t_read_packet(AVFormatContext *s,
|
|
AVPacket *pkt)
|
|
{
|
|
ByteIOContext *pb = s->pb;
|
|
int frame_size;
|
|
int keyframe = 0;
|
|
uint32_t pts;
|
|
|
|
if(url_feof(pb))
|
|
return AVERROR(EIO);
|
|
|
|
frame_size = get_le24(pb);
|
|
if(get_byte(pb) & 0x80)
|
|
keyframe = 1;
|
|
pts = get_le32(pb);
|
|
if(av_get_packet(pb, pkt, frame_size) < 0)
|
|
return AVERROR(EIO);
|
|
if(s->streams[0]->time_base.den == 1000)
|
|
pkt->pts = pts;
|
|
pkt->flags |= keyframe ? PKT_FLAG_KEY : 0;
|
|
pkt->pos -= 8;
|
|
|
|
return pkt->size;
|
|
}
|
|
|
|
AVInputFormat vc1t_demuxer = {
|
|
"vc1test",
|
|
NULL_IF_CONFIG_SMALL("VC-1 test bitstream format"),
|
|
0,
|
|
vc1t_probe,
|
|
vc1t_read_header,
|
|
vc1t_read_packet,
|
|
.flags = AVFMT_GENERIC_INDEX,
|
|
};
|