yading@11: /*
yading@11:  * D-Cinema audio demuxer
yading@11:  * Copyright (c) 2005 Reimar Döffinger
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/channel_layout.h"
yading@11: #include "avformat.h"
yading@11: 
yading@11: static int daud_header(AVFormatContext *s) {
yading@11:     AVStream *st = avformat_new_stream(s, NULL);
yading@11:     if (!st)
yading@11:         return AVERROR(ENOMEM);
yading@11:     st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
yading@11:     st->codec->codec_id = AV_CODEC_ID_PCM_S24DAUD;
yading@11:     st->codec->codec_tag = MKTAG('d', 'a', 'u', 'd');
yading@11:     st->codec->channels = 6;
yading@11:     st->codec->channel_layout = AV_CH_LAYOUT_5POINT1;
yading@11:     st->codec->sample_rate = 96000;
yading@11:     st->codec->bit_rate = 3 * 6 * 96000 * 8;
yading@11:     st->codec->block_align = 3 * 6;
yading@11:     st->codec->bits_per_coded_sample = 24;
yading@11:     return 0;
yading@11: }
yading@11: 
yading@11: static int daud_packet(AVFormatContext *s, AVPacket *pkt) {
yading@11:     AVIOContext *pb = s->pb;
yading@11:     int ret, size;
yading@11:     if (url_feof(pb))
yading@11:         return AVERROR(EIO);
yading@11:     size = avio_rb16(pb);
yading@11:     avio_rb16(pb); // unknown
yading@11:     ret = av_get_packet(pb, pkt, size);
yading@11:     pkt->stream_index = 0;
yading@11:     return ret;
yading@11: }
yading@11: 
yading@11: static int daud_write_header(struct AVFormatContext *s)
yading@11: {
yading@11:     AVCodecContext *codec = s->streams[0]->codec;
yading@11:     if (codec->channels!=6 || codec->sample_rate!=96000)
yading@11:         return -1;
yading@11:     return 0;
yading@11: }
yading@11: 
yading@11: static int daud_write_packet(struct AVFormatContext *s, AVPacket *pkt)
yading@11: {
yading@11:     if (pkt->size > 65535) {
yading@11:         av_log(s, AV_LOG_ERROR,
yading@11:                "Packet size too large for s302m. (%d > 65535)\n", pkt->size);
yading@11:         return -1;
yading@11:     }
yading@11:     avio_wb16(s->pb, pkt->size);
yading@11:     avio_wb16(s->pb, 0x8010); // unknown
yading@11:     avio_write(s->pb, pkt->data, pkt->size);
yading@11:     return 0;
yading@11: }
yading@11: 
yading@11: #if CONFIG_DAUD_DEMUXER
yading@11: AVInputFormat ff_daud_demuxer = {
yading@11:     .name           = "daud",
yading@11:     .long_name      = NULL_IF_CONFIG_SMALL("D-Cinema audio"),
yading@11:     .read_header    = daud_header,
yading@11:     .read_packet    = daud_packet,
yading@11:     .extensions     = "302,daud",
yading@11: };
yading@11: #endif
yading@11: 
yading@11: #if CONFIG_DAUD_MUXER
yading@11: AVOutputFormat ff_daud_muxer = {
yading@11:     .name         = "daud",
yading@11:     .long_name    = NULL_IF_CONFIG_SMALL("D-Cinema audio"),
yading@11:     .extensions   = "302",
yading@11:     .audio_codec  = AV_CODEC_ID_PCM_S24DAUD,
yading@11:     .video_codec  = AV_CODEC_ID_NONE,
yading@11:     .write_header = daud_write_header,
yading@11:     .write_packet = daud_write_packet,
yading@11:     .flags        = AVFMT_NOTIMESTAMPS,
yading@11: };
yading@11: #endif