mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-11-26 19:01:44 +02:00
78accb876c
* qatar/master: ffmpeg: fix some indentation ffmpeg: fix operation with --disable-avfilter simple_idct: remove disabled code motion_est: remove disabled code vc1: remove disabled code fate: separate lavf-mxf_d10 test from lavf-mxf cabac: Move code only used in the cabac test program to cabac.c. ffplay: warn that -pix_fmt is no longer working, suggest alternative ffplay: warn that -s is no longer working, suggest alternative lavf: rename enc variable in utils.c:has_codec_parameters() lavf: use designated initialisers for all (de)muxers. wav: remove a use of deprecated AV_METADATA_ macro rmdec: remove useless ap parameter from rm_read_header_old() dct-test: remove write-only variable des: fix #if conditional around P_shuffle Use LOCAL_ALIGNED in ff_check_alignment() Conflicts: ffmpeg.c libavformat/avidec.c libavformat/matroskaenc.c libavformat/mp3enc.c libavformat/oggenc.c libavformat/utils.c tests/ref/lavf/mxf Merged-by: Michael Niedermayer <michaelni@gmx.at>
120 lines
3.2 KiB
C
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"
|
|
|
|
#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,
|
|
AVFormatParameters *ap)
|
|
{
|
|
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 = av_new_stream(s, 0);
|
|
if (!st)
|
|
return -1;
|
|
|
|
st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
|
|
st->codec->codec_id = 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)
|
|
av_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;
|
|
}
|
|
av_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 format"),
|
|
.read_probe = vc1t_probe,
|
|
.read_header = vc1t_read_header,
|
|
.read_packet = vc1t_read_packet,
|
|
.flags = AVFMT_GENERIC_INDEX,
|
|
};
|