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/*
* IRCAM muxer
* Copyright (c) 2012 Paul B Mahol
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "libavutil/intreadwrite.h"
#include "avformat.h"
#include "avio_internal.h"
#include "internal.h"
#include "rawenc.h"
#include "ircam.h"
static int ircam_write_header(AVFormatContext *s)
{
AVCodecParameters *par = s->streams[0]->codecpar;
uint32_t tag;
if (s->nb_streams != 1) {
av_log(s, AV_LOG_ERROR, "only one stream is supported\n");
return AVERROR(EINVAL);
}
tag = ff_codec_get_tag(ff_codec_ircam_le_tags, par->codec_id);
if (!tag) {
av_log(s, AV_LOG_ERROR, "unsupported codec\n");
return AVERROR(EINVAL);
}
avio_wl32(s->pb, 0x0001A364);
avio_wl32(s->pb, av_q2intfloat((AVRational){par->sample_rate, 1}));
avio_wl32(s->pb, par->ch_layout.nb_channels);
avio_wl32(s->pb, tag);
ffio_fill(s->pb, 0, 1008);
return 0;
}
const AVOutputFormat ff_ircam_muxer = {
.name = "ircam",
.extensions = "sf,ircam",
.long_name = NULL_IF_CONFIG_SMALL("Berkeley/IRCAM/CARL Sound Format"),
.audio_codec = AV_CODEC_ID_PCM_S16LE,
.video_codec = AV_CODEC_ID_NONE,
.write_header = ircam_write_header,
.write_packet = ff_raw_write_packet,
.codec_tag = (const AVCodecTag *const []){ ff_codec_ircam_le_tags, 0 },
};
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