daudenc.c 1.74 KB
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/*
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 * D-Cinema audio muxer
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 * Copyright (c) 2005 Reimar Döffinger
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 *
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 * This file is part of FFmpeg.
 *
 * FFmpeg is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
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 * version 2.1 of the License, or (at your option) any later version.
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 *
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 * FFmpeg is distributed in the hope that it will be useful,
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 * 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
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 * License along with FFmpeg; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
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#include "avformat.h"

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static int daud_write_header(struct AVFormatContext *s)
{
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    AVCodecParameters *par = s->streams[0]->codecpar;
    if (par->channels!=6 || par->sample_rate!=96000)
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        return -1;
    return 0;
}

static int daud_write_packet(struct AVFormatContext *s, AVPacket *pkt)
{
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    if (pkt->size > 65535) {
        av_log(s, AV_LOG_ERROR,
               "Packet size too large for s302m. (%d > 65535)\n", pkt->size);
        return -1;
    }
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    avio_wb16(s->pb, pkt->size);
    avio_wb16(s->pb, 0x8010); // unknown
    avio_write(s->pb, pkt->data, pkt->size);
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    return 0;
}

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AVOutputFormat ff_daud_muxer = {
    .name         = "daud",
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    .long_name    = NULL_IF_CONFIG_SMALL("D-Cinema audio"),
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    .extensions   = "302",
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    .audio_codec  = AV_CODEC_ID_PCM_S24DAUD,
    .video_codec  = AV_CODEC_ID_NONE,
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    .write_header = daud_write_header,
    .write_packet = daud_write_packet,
    .flags        = AVFMT_NOTIMESTAMPS,
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};