yading@11: /*
yading@11:  * IRCAM muxer
yading@11:  * Copyright (c) 2012 Paul B Mahol
yading@11:  *
yading@11:  * This file is part of FFmpeg.
yading@11:  *
yading@11:  * FFmpeg is free software; you can redistribute it and/or
yading@11:  * modify it under the terms of the GNU Lesser General Public
yading@11:  * License as published by the Free Software Foundation; either
yading@11:  * version 2.1 of the License, or (at your option) any later version.
yading@11:  *
yading@11:  * FFmpeg is distributed in the hope that it will be useful,
yading@11:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@11:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@11:  * Lesser General Public License for more details.
yading@11:  *
yading@11:  * You should have received a copy of the GNU Lesser General Public
yading@11:  * License along with FFmpeg; if not, write to the Free Software
yading@11:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@11:  */
yading@11: 
yading@11: #include "libavutil/intreadwrite.h"
yading@11: #include "avformat.h"
yading@11: #include "avio_internal.h"
yading@11: #include "internal.h"
yading@11: #include "rawenc.h"
yading@11: #include "ircam.h"
yading@11: 
yading@11: static int ircam_write_header(AVFormatContext *s)
yading@11: {
yading@11:     AVCodecContext *codec = s->streams[0]->codec;
yading@11:     uint32_t tag;
yading@11: 
yading@11:     if (s->nb_streams != 1) {
yading@11:         av_log(s, AV_LOG_ERROR, "only one stream is supported\n");
yading@11:         return AVERROR(EINVAL);
yading@11:     }
yading@11: 
yading@11:     tag = ff_codec_get_tag(ff_codec_ircam_le_tags, codec->codec_id);
yading@11:     if (!tag) {
yading@11:         av_log(s, AV_LOG_ERROR, "unsupported codec\n");
yading@11:         return AVERROR(EINVAL);
yading@11:     }
yading@11: 
yading@11:     avio_wl32(s->pb, 0x0001A364);
yading@11:     avio_wl32(s->pb, av_float2int(codec->sample_rate));
yading@11:     avio_wl32(s->pb, codec->channels);
yading@11:     avio_wl32(s->pb, tag);
yading@11:     ffio_fill(s->pb, 0, 1008);
yading@11:     return 0;
yading@11: }
yading@11: 
yading@11: AVOutputFormat ff_ircam_muxer = {
yading@11:     .name           = "ircam",
yading@11:     .extensions     = "sf,ircam",
yading@11:     .long_name      = NULL_IF_CONFIG_SMALL("Berkeley/IRCAM/CARL Sound Format"),
yading@11:     .audio_codec    = AV_CODEC_ID_PCM_S16LE,
yading@11:     .video_codec    = AV_CODEC_ID_NONE,
yading@11:     .write_header   = ircam_write_header,
yading@11:     .write_packet   = ff_raw_write_packet,
yading@11:     .codec_tag      = (const AVCodecTag *const []){ ff_codec_ircam_le_tags, 0 },
yading@11: };