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2ba45a60 DM |
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 | AVCodecContext *codec = s->streams[0]->codec; | |
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, codec->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_float2int(codec->sample_rate)); | |
47 | avio_wl32(s->pb, codec->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 | }; |