3 * Copyright (c) 2012 Paul B Mahol
5 * This file is part of FFmpeg.
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.
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.
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
22 #include "libavutil/intreadwrite.h"
24 #include "avio_internal.h"
30 static int ircam_write_header(AVFormatContext *s)
32 AVCodecParameters *par = s->streams[0]->codecpar;
35 if (s->nb_streams != 1) {
36 av_log(s, AV_LOG_ERROR, "only one stream is supported\n");
37 return AVERROR(EINVAL);
40 tag = ff_codec_get_tag(ff_codec_ircam_le_tags, par->codec_id);
42 av_log(s, AV_LOG_ERROR, "unsupported codec\n");
43 return AVERROR(EINVAL);
46 avio_wl32(s->pb, 0x0001A364);
47 avio_wl32(s->pb, av_q2intfloat((AVRational){par->sample_rate, 1}));
48 avio_wl32(s->pb, par->ch_layout.nb_channels);
49 avio_wl32(s->pb, tag);
50 ffio_fill(s->pb, 0, 1008);
54 const FFOutputFormat ff_ircam_muxer = {
56 .p.extensions = "sf,ircam",
57 .p.long_name = NULL_IF_CONFIG_SMALL("Berkeley/IRCAM/CARL Sound Format"),
58 .p.audio_codec = AV_CODEC_ID_PCM_S16LE,
59 .p.video_codec = AV_CODEC_ID_NONE,
60 .write_header = ircam_write_header,
61 .write_packet = ff_raw_write_packet,
62 .p.codec_tag = (const AVCodecTag *const []){ ff_codec_ircam_le_tags, 0 },