PeerStreamer

/*

 * D-Cinema audio demuxer

 * Copyright (c) 2005 Reimar Döffinger

 *

 * This file is part of Libav.

 *

 * Libav 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.

 *

 * Libav 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 Libav; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

 */

#include "avformat.h"

static int daud_header(AVFormatContext *s, AVFormatParameters *ap) {

    AVStream *st = av_new_stream(s, 0);

    if (!st)

        return AVERROR(ENOMEM);

    st->codec->codec_type = AVMEDIA_TYPE_AUDIO;

    st->codec->codec_id = CODEC_ID_PCM_S24DAUD;

    st->codec->codec_tag = MKTAG('d', 'a', 'u', 'd');

    st->codec->channels = 6;

    st->codec->sample_rate = 96000;

    st->codec->bit_rate = 3 * 6 * 96000 * 8;

    st->codec->block_align = 3 * 6;

    st->codec->bits_per_coded_sample = 24;

    return 0;

}

static int daud_packet(AVFormatContext *s, AVPacket *pkt) {

    AVIOContext *pb = s->pb;

    int ret, size;

    if (pb->eof_reached)

        return AVERROR(EIO);

    size = avio_rb16(pb);

    avio_rb16(pb); // unknown

    ret = av_get_packet(pb, pkt, size);

    pkt->stream_index = 0;

    return ret;

}

static int daud_write_header(struct AVFormatContext *s)

{

    AVCodecContext *codec = s->streams[0]->codec;

    if (codec->channels!=6 || codec->sample_rate!=96000)

        return -1;

    return 0;

}

static int daud_write_packet(struct AVFormatContext *s, AVPacket *pkt)

{

    avio_wb16(s->pb, pkt->size);

    avio_wb16(s->pb, 0x8010); // unknown

    avio_write(s->pb, pkt->data, pkt->size);

    avio_flush(s->pb);

    return 0;

}

#if CONFIG_DAUD_DEMUXER

AVInputFormat ff_daud_demuxer = {

    "daud",

    NULL_IF_CONFIG_SMALL("D-Cinema audio format"),

    0,

    NULL,

    daud_header,

    daud_packet,

    NULL,

    NULL,

    .extensions = "302",

};

#endif

#if CONFIG_DAUD_MUXER

AVOutputFormat ff_daud_muxer =

{

    "daud",

    NULL_IF_CONFIG_SMALL("D-Cinema audio format"),

    NULL,

    "302",

    0,

    CODEC_ID_PCM_S24DAUD,

    CODEC_ID_NONE,

    daud_write_header,

    daud_write_packet,

    .flags= AVFMT_NOTIMESTAMPS,

};

#endif