aac5773f
 hucm
功能基本完成，接口待打磨
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/*
* D-Cinema audio demuxer
* Copyright (c) 2005 Reimar Döffinger
*
* 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/channel_layout.h"
#include "avformat.h"
static int daud_header(AVFormatContext *s) {
AVStream *st = avformat_new_stream(s, NULL);
if (!st)
return AVERROR(ENOMEM);
st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
st->codecpar->codec_id = AV_CODEC_ID_PCM_S24DAUD;
st->codecpar->codec_tag = MKTAG('d', 'a', 'u', 'd');
st->codecpar->channels = 6;
st->codecpar->channel_layout = AV_CH_LAYOUT_5POINT1;
st->codecpar->sample_rate = 96000;
st->codecpar->bit_rate = 3 * 6 * 96000 * 8;
st->codecpar->block_align = 3 * 6;
st->codecpar->bits_per_coded_sample = 24;
return 0;
}
static int daud_packet(AVFormatContext *s, AVPacket *pkt) {
AVIOContext *pb = s->pb;
int ret, size;
if (avio_feof(pb))
return AVERROR(EIO);
size = avio_rb16(pb);
avio_rb16(pb); // unknown
ret = av_get_packet(pb, pkt, size);
pkt->stream_index = 0;
return ret;
}
AVInputFormat ff_daud_demuxer = {
.name = "daud",
.long_name = NULL_IF_CONFIG_SMALL("D-Cinema audio"),
.read_header = daud_header,
.read_packet = daud_packet,
.extensions = "302,daud",
};
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