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"
29 static int ircam_write_header(AVFormatContext
*s
)
31 AVCodecContext
*codec
= s
->streams
[0]->codec
;
34 if (s
->nb_streams
!= 1) {
35 av_log(s
, AV_LOG_ERROR
, "only one stream is supported\n");
36 return AVERROR(EINVAL
);
39 tag
= ff_codec_get_tag(ff_codec_ircam_le_tags
, codec
->codec_id
);
41 av_log(s
, AV_LOG_ERROR
, "unsupported codec\n");
42 return AVERROR(EINVAL
);
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);
53 AVOutputFormat ff_ircam_muxer
= {
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 },