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a8f0c9c5b9
The only reason why it does not break them is that flv has the same score and happens to be first in the list. Originally committed as revision 12834 to svn://svn.ffmpeg.org/ffmpeg/trunk
113 lines
2.8 KiB
C
113 lines
2.8 KiB
C
/*
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* VC1 Test Bitstreams Format Demuxer
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* Copyright (c) 2006, 2008 Konstantin Shishkov
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file vc1test.c
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* VC1 test bitstream file demuxer
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* by Konstantin Shishkov
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* Format specified in SMPTE standard 421 Annex L
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*/
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#include "avformat.h"
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#define VC1_EXTRADATA_SIZE 4
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static int vc1t_probe(AVProbeData *p)
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{
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if (p->buf[3] != 0xC5 && AV_RL32(&p->buf[4]) != 4)
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return 0;
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return AVPROBE_SCORE_MAX/2;
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}
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static int vc1t_read_header(AVFormatContext *s,
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AVFormatParameters *ap)
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{
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ByteIOContext *pb = s->pb;
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AVStream *st;
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int fps, frames;
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frames = get_le24(pb);
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if(get_byte(pb) != 0xC5 || get_le32(pb) != 4)
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return -1;
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/* init video codec */
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st = av_new_stream(s, 0);
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if (!st)
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return -1;
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st->codec->codec_type = CODEC_TYPE_VIDEO;
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st->codec->codec_id = CODEC_ID_WMV3;
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st->codec->extradata = av_malloc(VC1_EXTRADATA_SIZE);
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st->codec->extradata_size = VC1_EXTRADATA_SIZE;
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get_buffer(pb, st->codec->extradata, VC1_EXTRADATA_SIZE);
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st->codec->height = get_le32(pb);
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st->codec->width = get_le32(pb);
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if(get_le32(pb) != 0xC)
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return -1;
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url_fskip(pb, 8);
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fps = get_le32(pb);
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if(fps == -1)
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av_set_pts_info(st, 32, 1, 1000);
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else{
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av_set_pts_info(st, 24, 1, fps);
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st->duration = frames;
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}
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return 0;
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}
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static int vc1t_read_packet(AVFormatContext *s,
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AVPacket *pkt)
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{
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ByteIOContext *pb = s->pb;
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int frame_size;
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int keyframe = 0;
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uint32_t pts;
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if(url_feof(pb))
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return AVERROR(EIO);
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frame_size = get_le24(pb);
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if(get_byte(pb) & 0x80)
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keyframe = 1;
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pts = get_le32(pb);
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if(av_get_packet(pb, pkt, frame_size) < 0)
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return AVERROR(EIO);
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if(s->streams[0]->time_base.den == 1000)
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pkt->pts = pts;
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pkt->flags |= keyframe ? PKT_FLAG_KEY : 0;
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pkt->pos -= 8;
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return pkt->size;
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}
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AVInputFormat vc1t_demuxer = {
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"vc1test",
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"VC1 test bitstream format",
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0,
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vc1t_probe,
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vc1t_read_header,
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vc1t_read_packet,
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.flags = AVFMT_GENERIC_INDEX,
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};
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