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libavformat
daud.c
Go to the documentation of this file.
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/*
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* D-Cinema audio demuxer
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* Copyright (c) 2005 Reimar Döffinger
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*
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* This file is part of Libav.
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*
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* Libav is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* 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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* Libav is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with Libav; 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_header
(
AVFormatContext
*s,
AVFormatParameters
*ap) {
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AVStream
*st =
avformat_new_stream
(s,
NULL
);
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if
(!st)
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return
AVERROR
(ENOMEM);
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st->
codec
->
codec_type
=
AVMEDIA_TYPE_AUDIO
;
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st->
codec
->
codec_id
=
CODEC_ID_PCM_S24DAUD
;
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st->
codec
->
codec_tag
=
MKTAG
(
'd'
,
'a'
,
'u'
,
'd'
);
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st->
codec
->
channels
= 6;
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st->
codec
->
sample_rate
= 96000;
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st->
codec
->
bit_rate
= 3 * 6 * 96000 * 8;
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st->
codec
->
block_align
= 3 * 6;
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st->
codec
->
bits_per_coded_sample
= 24;
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return
0;
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}
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static
int
daud_packet
(
AVFormatContext
*s,
AVPacket
*pkt) {
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AVIOContext
*pb = s->
pb
;
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int
ret,
size
;
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if
(pb->
eof_reached
)
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return
AVERROR
(EIO);
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size =
avio_rb16
(pb);
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avio_rb16
(pb);
// unknown
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ret =
av_get_packet
(pb, pkt, size);
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pkt->
stream_index
= 0;
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return
ret;
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}
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static
int
daud_write_header
(
struct
AVFormatContext
*s)
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{
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AVCodecContext
*codec = s->
streams
[0]->
codec
;
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if
(codec->
channels
!=6 || codec->
sample_rate
!=96000)
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return
-1;
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return
0;
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}
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static
int
daud_write_packet
(
struct
AVFormatContext
*s,
AVPacket
*pkt)
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{
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if
(pkt->
size
> 65535) {
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av_log
(s,
AV_LOG_ERROR
,
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"Packet size too large for s302m. (%d > 65535)\n"
, pkt->
size
);
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return
-1;
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}
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avio_wb16
(s->
pb
, pkt->
size
);
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avio_wb16
(s->
pb
, 0x8010);
// unknown
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avio_write
(s->
pb
, pkt->
data
, pkt->
size
);
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avio_flush
(s->
pb
);
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return
0;
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}
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#if CONFIG_DAUD_DEMUXER
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AVInputFormat
ff_daud_demuxer = {
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.
name
=
"daud"
,
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.long_name =
NULL_IF_CONFIG_SMALL
(
"D-Cinema audio format"
),
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.read_header =
daud_header
,
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.read_packet =
daud_packet
,
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.extensions =
"302"
,
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};
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#endif
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#if CONFIG_DAUD_MUXER
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AVOutputFormat
ff_daud_muxer = {
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.
name
=
"daud"
,
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.long_name =
NULL_IF_CONFIG_SMALL
(
"D-Cinema audio format"
),
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.extensions =
"302"
,
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.audio_codec =
CODEC_ID_PCM_S24DAUD
,
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.video_codec =
CODEC_ID_NONE
,
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.write_header =
daud_write_header
,
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.write_packet =
daud_write_packet
,
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.flags =
AVFMT_NOTIMESTAMPS
,
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};
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#endif