mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2024-12-21 06:50:44 +00:00
9d76cf0b18
* qatar/master: rtpdec: Templatize the code for different g726 bitrate variants rv40: move loop filter to rv34dsp context lavf: make av_set_pts_info private. rtpdec: Add support for G726 audio rtpdec: Add an init function that can do custom codec context initialization avconv: make copy_tb on by default. matroskadec: don't set codec timebase. rmdec: don't set codec timebase. avconv: compute next_pts from input packet duration when possible. lavf: estimate frame duration from r_frame_rate. avconv: update InputStream.pts in the streamcopy case. Conflicts: avconv.c libavdevice/alsa-audio-dec.c libavdevice/bktr.c libavdevice/fbdev.c libavdevice/libdc1394.c libavdevice/oss_audio.c libavdevice/v4l.c libavdevice/v4l2.c libavdevice/vfwcap.c libavdevice/x11grab.c libavformat/au.c libavformat/eacdata.c libavformat/flvdec.c libavformat/mpegts.c libavformat/mxfenc.c libavformat/rtpdec_g726.c libavformat/wtv.c libavformat/xmv.c Merged-by: Michael Niedermayer <michaelni@gmx.at>
79 lines
2.2 KiB
C
79 lines
2.2 KiB
C
/*
|
|
* CD Graphics Demuxer
|
|
* Copyright (c) 2009 Michael Tison
|
|
*
|
|
* 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 "avformat.h"
|
|
#include "internal.h"
|
|
|
|
#define CDG_PACKET_SIZE 24
|
|
#define CDG_COMMAND 0x09
|
|
#define CDG_MASK 0x3F
|
|
|
|
static int read_header(AVFormatContext *s, AVFormatParameters *ap)
|
|
{
|
|
AVStream *vst;
|
|
int ret;
|
|
|
|
vst = avformat_new_stream(s, NULL);
|
|
if (!vst)
|
|
return AVERROR(ENOMEM);
|
|
|
|
vst->codec->codec_type = AVMEDIA_TYPE_VIDEO;
|
|
vst->codec->codec_id = CODEC_ID_CDGRAPHICS;
|
|
|
|
/// 75 sectors/sec * 4 packets/sector = 300 packets/sec
|
|
avpriv_set_pts_info(vst, 32, 1, 300);
|
|
|
|
ret = avio_size(s->pb);
|
|
if (ret > 0)
|
|
vst->duration = (ret * vst->time_base.den) / (CDG_PACKET_SIZE * 300);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int read_packet(AVFormatContext *s, AVPacket *pkt)
|
|
{
|
|
int ret;
|
|
|
|
while (1) {
|
|
ret = av_get_packet(s->pb, pkt, CDG_PACKET_SIZE);
|
|
if (ret < 1 || (pkt->data[0] & CDG_MASK) == CDG_COMMAND)
|
|
break;
|
|
av_free_packet(pkt);
|
|
}
|
|
|
|
pkt->stream_index = 0;
|
|
pkt->dts=pkt->pts= s->streams[0]->cur_dts;
|
|
|
|
if(ret>5 && (pkt->data[0]&0x3F) == 9 && (pkt->data[1]&0x3F)==1 && !(pkt->data[2+2+1] & 0x0F)){
|
|
pkt->flags = AV_PKT_FLAG_KEY;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
AVInputFormat ff_cdg_demuxer = {
|
|
.name = "cdg",
|
|
.long_name = NULL_IF_CONFIG_SMALL("CD Graphics Format"),
|
|
.read_header = read_header,
|
|
.read_packet = read_packet,
|
|
.flags= AVFMT_GENERIC_INDEX,
|
|
.extensions = "cdg"
|
|
};
|