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ffmpeg/libavformat/vc1test.c
Michael Niedermayer 7a72695c05 Merge commit '36ef5369ee9b336febc2c270f8718cec4476cb85'
* commit '36ef5369ee9b336febc2c270f8718cec4476cb85':
  Replace all CODEC_ID_* with AV_CODEC_ID_*
  lavc: add AV prefix to codec ids.

Conflicts:
	doc/APIchanges
	doc/examples/decoding_encoding.c
	doc/examples/muxing.c
	ffmpeg.c
	ffprobe.c
	ffserver.c
	libavcodec/8svx.c
	libavcodec/avcodec.h
	libavcodec/dnxhd_parser.c
	libavcodec/dvdsubdec.c
	libavcodec/error_resilience.c
	libavcodec/h263dec.c
	libavcodec/libvorbisenc.c
	libavcodec/mjpeg_parser.c
	libavcodec/mjpegenc.c
	libavcodec/mpeg12.c
	libavcodec/mpeg4videodec.c
	libavcodec/mpegvideo.c
	libavcodec/mpegvideo_enc.c
	libavcodec/pcm.c
	libavcodec/r210dec.c
	libavcodec/utils.c
	libavcodec/v210dec.c
	libavcodec/version.h
	libavdevice/alsa-audio-dec.c
	libavdevice/bktr.c
	libavdevice/v4l2.c
	libavformat/asfdec.c
	libavformat/asfenc.c
	libavformat/avformat.h
	libavformat/avidec.c
	libavformat/caf.c
	libavformat/electronicarts.c
	libavformat/flacdec.c
	libavformat/flvdec.c
	libavformat/flvenc.c
	libavformat/framecrcenc.c
	libavformat/img2.c
	libavformat/img2dec.c
	libavformat/img2enc.c
	libavformat/ipmovie.c
	libavformat/isom.c
	libavformat/matroska.c
	libavformat/matroskadec.c
	libavformat/matroskaenc.c
	libavformat/mov.c
	libavformat/movenc.c
	libavformat/mp3dec.c
	libavformat/mpeg.c
	libavformat/mpegts.c
	libavformat/mxf.c
	libavformat/mxfdec.c
	libavformat/mxfenc.c
	libavformat/nsvdec.c
	libavformat/nut.c
	libavformat/oggenc.c
	libavformat/pmpdec.c
	libavformat/rawdec.c
	libavformat/rawenc.c
	libavformat/riff.c
	libavformat/sdp.c
	libavformat/utils.c
	libavformat/vocenc.c
	libavformat/wtv.c
	libavformat/xmv.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>
2012-08-07 22:45:46 +02:00

120 lines
3.2 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
* VC1 test bitstream file demuxer
* by Konstantin Shishkov
* Format specified in SMPTE standard 421 Annex L
*/
#include "libavutil/intreadwrite.h"
#include "avformat.h"
#include "internal.h"
#define VC1_EXTRADATA_SIZE 4
static int vc1t_probe(AVProbeData *p)
{
if (p->buf_size < 24)
return 0;
if (p->buf[3] != 0xC5 || AV_RL32(&p->buf[4]) != 4 || AV_RL32(&p->buf[20]) != 0xC)
return 0;
return AVPROBE_SCORE_MAX/2;
}
static int vc1t_read_header(AVFormatContext *s)
{
AVIOContext *pb = s->pb;
AVStream *st;
int frames;
uint32_t fps;
frames = avio_rl24(pb);
if(avio_r8(pb) != 0xC5 || avio_rl32(pb) != 4)
return -1;
/* init video codec */
st = avformat_new_stream(s, NULL);
if (!st)
return -1;
st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
st->codec->codec_id = AV_CODEC_ID_WMV3;
st->codec->extradata = av_malloc(VC1_EXTRADATA_SIZE);
st->codec->extradata_size = VC1_EXTRADATA_SIZE;
avio_read(pb, st->codec->extradata, VC1_EXTRADATA_SIZE);
st->codec->height = avio_rl32(pb);
st->codec->width = avio_rl32(pb);
if(avio_rl32(pb) != 0xC)
return -1;
avio_skip(pb, 8);
fps = avio_rl32(pb);
if(fps == 0xFFFFFFFF)
avpriv_set_pts_info(st, 32, 1, 1000);
else{
if (!fps) {
av_log(s, AV_LOG_ERROR, "Zero FPS specified, defaulting to 1 FPS\n");
fps = 1;
}
avpriv_set_pts_info(st, 24, 1, fps);
st->duration = frames;
}
return 0;
}
static int vc1t_read_packet(AVFormatContext *s,
AVPacket *pkt)
{
AVIOContext *pb = s->pb;
int frame_size;
int keyframe = 0;
uint32_t pts;
if(url_feof(pb))
return AVERROR(EIO);
frame_size = avio_rl24(pb);
if(avio_r8(pb) & 0x80)
keyframe = 1;
pts = avio_rl32(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 ? AV_PKT_FLAG_KEY : 0;
pkt->pos -= 8;
return pkt->size;
}
AVInputFormat ff_vc1t_demuxer = {
.name = "vc1test",
.long_name = NULL_IF_CONFIG_SMALL("VC-1 test bitstream"),
.read_probe = vc1t_probe,
.read_header = vc1t_read_header,
.read_packet = vc1t_read_packet,
.flags = AVFMT_GENERIC_INDEX,
};