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https://github.com/FFmpeg/FFmpeg.git
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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
/*
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* CD Graphics Demuxer
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* Copyright (c) 2009 Michael Tison
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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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#include "avformat.h"
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#include "internal.h"
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#define CDG_PACKET_SIZE 24
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#define CDG_COMMAND 0x09
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#define CDG_MASK 0x3F
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static int read_header(AVFormatContext *s, AVFormatParameters *ap)
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{
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AVStream *vst;
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int ret;
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vst = avformat_new_stream(s, NULL);
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if (!vst)
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return AVERROR(ENOMEM);
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vst->codec->codec_type = AVMEDIA_TYPE_VIDEO;
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vst->codec->codec_id = CODEC_ID_CDGRAPHICS;
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/// 75 sectors/sec * 4 packets/sector = 300 packets/sec
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avpriv_set_pts_info(vst, 32, 1, 300);
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ret = avio_size(s->pb);
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if (ret > 0)
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vst->duration = (ret * vst->time_base.den) / (CDG_PACKET_SIZE * 300);
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return 0;
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}
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static int read_packet(AVFormatContext *s, AVPacket *pkt)
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{
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int ret;
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while (1) {
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ret = av_get_packet(s->pb, pkt, CDG_PACKET_SIZE);
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if (ret < 1 || (pkt->data[0] & CDG_MASK) == CDG_COMMAND)
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break;
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av_free_packet(pkt);
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}
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pkt->stream_index = 0;
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pkt->dts=pkt->pts= s->streams[0]->cur_dts;
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if(ret>5 && (pkt->data[0]&0x3F) == 9 && (pkt->data[1]&0x3F)==1 && !(pkt->data[2+2+1] & 0x0F)){
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pkt->flags = AV_PKT_FLAG_KEY;
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}
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return ret;
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}
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AVInputFormat ff_cdg_demuxer = {
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.name = "cdg",
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.long_name = NULL_IF_CONFIG_SMALL("CD Graphics Format"),
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.read_header = read_header,
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.read_packet = read_packet,
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.flags= AVFMT_GENERIC_INDEX,
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.extensions = "cdg"
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};
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