1 /*
2 * D-Cinema audio demuxer
3 * Copyright (c) 2005 Reimar Döffinger
4 *
5 * This file is part of FFmpeg.
6 *
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.
11 *
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.
16 *
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
20 */
21
22 #include "libavutil/channel_layout.h"
23 #include "avformat.h"
24
daud_header(AVFormatContext * s)25 static int daud_header(AVFormatContext *s) {
26 AVStream *st = avformat_new_stream(s, NULL);
27 if (!st)
28 return AVERROR(ENOMEM);
29 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
30 st->codecpar->codec_id = AV_CODEC_ID_PCM_S24DAUD;
31 st->codecpar->codec_tag = MKTAG('d', 'a', 'u', 'd');
32 st->codecpar->channels = 6;
33 st->codecpar->channel_layout = AV_CH_LAYOUT_5POINT1;
34 st->codecpar->sample_rate = 96000;
35 st->codecpar->bit_rate = 3 * 6 * 96000 * 8;
36 st->codecpar->block_align = 3 * 6;
37 st->codecpar->bits_per_coded_sample = 24;
38 return 0;
39 }
40
daud_packet(AVFormatContext * s,AVPacket * pkt)41 static int daud_packet(AVFormatContext *s, AVPacket *pkt) {
42 AVIOContext *pb = s->pb;
43 int ret, size;
44 if (avio_feof(pb))
45 return AVERROR(EIO);
46 size = avio_rb16(pb);
47 avio_rb16(pb); // unknown
48 ret = av_get_packet(pb, pkt, size);
49 pkt->stream_index = 0;
50 return ret;
51 }
52
53 AVInputFormat ff_daud_demuxer = {
54 .name = "daud",
55 .long_name = NULL_IF_CONFIG_SMALL("D-Cinema audio"),
56 .read_header = daud_header,
57 .read_packet = daud_packet,
58 .extensions = "302,daud",
59 };
60