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->ch_layout = (AVChannelLayout)AV_CHANNEL_LAYOUT_5POINT1;
33 st->codecpar->sample_rate = 96000;
34 st->codecpar->bit_rate = 3 * 6 * 96000 * 8;
35 st->codecpar->block_align = 3 * 6;
36 st->codecpar->bits_per_coded_sample = 24;
37 return 0;
38 }
39
daud_packet(AVFormatContext *s, AVPacket *pkt)40 static int daud_packet(AVFormatContext *s, AVPacket *pkt) {
41 AVIOContext *pb = s->pb;
42 int ret, size;
43 if (avio_feof(pb))
44 return AVERROR(EIO);
45 size = avio_rb16(pb);
46 avio_rb16(pb); // unknown
47 ret = av_get_packet(pb, pkt, size);
48 pkt->stream_index = 0;
49 return ret;
50 }
51
52 const AVInputFormat ff_daud_demuxer = {
53 .name = "daud",
54 .long_name = NULL_IF_CONFIG_SMALL("D-Cinema audio"),
55 .read_header = daud_header,
56 .read_packet = daud_packet,
57 .extensions = "302,daud",
58 };
59