blob: 323ecb37eec0cebe9a1e01535bcc70549db5b8a9
1 | /* |
2 | * IRCAM muxer |
3 | * Copyright (c) 2012 Paul B Mahol |
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/intreadwrite.h" |
23 | #include "avformat.h" |
24 | #include "avio_internal.h" |
25 | #include "internal.h" |
26 | #include "rawenc.h" |
27 | #include "ircam.h" |
28 | |
29 | static int ircam_write_header(AVFormatContext *s) |
30 | { |
31 | AVCodecParameters *par = s->streams[0]->codecpar; |
32 | uint32_t tag; |
33 | |
34 | if (s->nb_streams != 1) { |
35 | av_log(s, AV_LOG_ERROR, "only one stream is supported\n"); |
36 | return AVERROR(EINVAL); |
37 | } |
38 | |
39 | tag = ff_codec_get_tag(ff_codec_ircam_le_tags, par->codec_id); |
40 | if (!tag) { |
41 | av_log(s, AV_LOG_ERROR, "unsupported codec\n"); |
42 | return AVERROR(EINVAL); |
43 | } |
44 | |
45 | avio_wl32(s->pb, 0x0001A364); |
46 | avio_wl32(s->pb, av_q2intfloat((AVRational){par->sample_rate, 1})); |
47 | avio_wl32(s->pb, par->channels); |
48 | avio_wl32(s->pb, tag); |
49 | ffio_fill(s->pb, 0, 1008); |
50 | return 0; |
51 | } |
52 | |
53 | AVOutputFormat ff_ircam_muxer = { |
54 | .name = "ircam", |
55 | .extensions = "sf,ircam", |
56 | .long_name = NULL_IF_CONFIG_SMALL("Berkeley/IRCAM/CARL Sound Format"), |
57 | .audio_codec = AV_CODEC_ID_PCM_S16LE, |
58 | .video_codec = AV_CODEC_ID_NONE, |
59 | .write_header = ircam_write_header, |
60 | .write_packet = ff_raw_write_packet, |
61 | .codec_tag = (const AVCodecTag *const []){ ff_codec_ircam_le_tags, 0 }, |
62 | }; |
63 |