/*
  * 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->channels);

     avio_wl32(s->pb, tag);

     ffio_fill(s->pb, 0, 1008);

     return 0;
 }
 
 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 },
 };