2 * D-Cinema audio demuxer
3 * Copyright (c) 2005 Reimar Döffinger
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 #include "libavutil/channel_layout.h"
25 static int daud_header(AVFormatContext *s) {
26 AVStream *st = avformat_new_stream(s, NULL);
28 return AVERROR(ENOMEM);
29 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
30 st->codec->codec_id = AV_CODEC_ID_PCM_S24DAUD;
31 st->codec->codec_tag = MKTAG('d', 'a', 'u', 'd');
32 st->codec->channels = 6;
33 st->codec->channel_layout = AV_CH_LAYOUT_5POINT1;
34 st->codec->sample_rate = 96000;
35 st->codec->bit_rate = 3 * 6 * 96000 * 8;
36 st->codec->block_align = 3 * 6;
37 st->codec->bits_per_coded_sample = 24;
41 static int daud_packet(AVFormatContext *s, AVPacket *pkt) {
42 AVIOContext *pb = s->pb;
47 avio_rb16(pb); // unknown
48 ret = av_get_packet(pb, pkt, size);
49 pkt->stream_index = 0;
53 static int daud_write_header(struct AVFormatContext *s)
55 AVCodecContext *codec = s->streams[0]->codec;
56 if (codec->channels!=6 || codec->sample_rate!=96000)
61 static int daud_write_packet(struct AVFormatContext *s, AVPacket *pkt)
63 if (pkt->size > 65535) {
64 av_log(s, AV_LOG_ERROR,
65 "Packet size too large for s302m. (%d > 65535)\n", pkt->size);
68 avio_wb16(s->pb, pkt->size);
69 avio_wb16(s->pb, 0x8010); // unknown
70 avio_write(s->pb, pkt->data, pkt->size);
74 #if CONFIG_DAUD_DEMUXER
75 AVInputFormat ff_daud_demuxer = {
77 .long_name = NULL_IF_CONFIG_SMALL("D-Cinema audio"),
78 .read_header = daud_header,
79 .read_packet = daud_packet,
80 .extensions = "302,daud",
85 AVOutputFormat ff_daud_muxer = {
87 .long_name = NULL_IF_CONFIG_SMALL("D-Cinema audio"),
89 .audio_codec = AV_CODEC_ID_PCM_S24DAUD,
90 .video_codec = AV_CODEC_ID_NONE,
91 .write_header = daud_write_header,
92 .write_packet = daud_write_packet,
93 .flags = AVFMT_NOTIMESTAMPS,