mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-28 20:53:54 +02:00
7308439158
Since 596e5d4783, this is not necessary anymore. It also allows to
actually disable the flushing, improving write performance (but
possibly giving worse latency in real-time streaming).
Signed-off-by: Martin Storsjö <martin@martin.st>
96 lines
2.9 KiB
C
96 lines
2.9 KiB
C
/*
|
|
* 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 "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->codec->codec_type = AVMEDIA_TYPE_AUDIO;
|
|
st->codec->codec_id = AV_CODEC_ID_PCM_S24DAUD;
|
|
st->codec->codec_tag = MKTAG('d', 'a', 'u', 'd');
|
|
st->codec->channels = 6;
|
|
st->codec->channel_layout = AV_CH_LAYOUT_5POINT1;
|
|
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)
|
|
{
|
|
if (pkt->size > 65535) {
|
|
av_log(s, AV_LOG_ERROR,
|
|
"Packet size too large for s302m. (%d > 65535)\n", pkt->size);
|
|
return -1;
|
|
}
|
|
avio_wb16(s->pb, pkt->size);
|
|
avio_wb16(s->pb, 0x8010); // unknown
|
|
avio_write(s->pb, pkt->data, pkt->size);
|
|
return 0;
|
|
}
|
|
|
|
#if CONFIG_DAUD_DEMUXER
|
|
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",
|
|
};
|
|
#endif
|
|
|
|
#if CONFIG_DAUD_MUXER
|
|
AVOutputFormat ff_daud_muxer = {
|
|
.name = "daud",
|
|
.long_name = NULL_IF_CONFIG_SMALL("D-Cinema audio"),
|
|
.extensions = "302",
|
|
.audio_codec = AV_CODEC_ID_PCM_S24DAUD,
|
|
.video_codec = AV_CODEC_ID_NONE,
|
|
.write_header = daud_write_header,
|
|
.write_packet = daud_write_packet,
|
|
.flags = AVFMT_NOTIMESTAMPS,
|
|
};
|
|
#endif
|