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2ba45a60 DM |
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 | ||
25 | static int daud_header(AVFormatContext *s) { | |
26 | AVStream *st = avformat_new_stream(s, NULL); | |
27 | if (!st) | |
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; | |
38 | return 0; | |
39 | } | |
40 | ||
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 | }; |