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libavformat
daudenc.c
Go to the documentation of this file.
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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.
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*
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* 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
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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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* 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
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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 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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{
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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) {
35
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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return
0;
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}
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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"
),
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.extensions =
"302"
,
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.audio_codec =
AV_CODEC_ID_PCM_S24DAUD
,
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.video_codec =
AV_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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};
AV_CODEC_ID_PCM_S24DAUD
Definition:
avcodec.h:345
s
const char * s
Definition:
avisynth_c.h:631
AV_CODEC_ID_NONE
Definition:
avcodec.h:103
ff_daud_muxer
AVOutputFormat ff_daud_muxer
Definition:
daudenc.c:45
AVPacket::size
int size
Definition:
avcodec.h:1163
pkt
static AVPacket pkt
Definition:
demuxing_decoding.c:54
AVFormatContext
Format I/O context.
Definition:
avformat.h:1272
AVFormatContext::streams
AVStream ** streams
A list of all streams in the file.
Definition:
avformat.h:1340
AVPacket::data
uint8_t * data
Definition:
avcodec.h:1162
avio_write
void avio_write(AVIOContext *s, const unsigned char *buf, int size)
Definition:
aviobuf.c:177
av_log
#define av_log(a,...)
Definition:
tableprint_vlc.h:28
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition:
log.h:176
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition:
internal.h:175
daud_write_packet
static int daud_write_packet(struct AVFormatContext *s, AVPacket *pkt)
Definition:
daudenc.c:32
AVStream::codec
AVCodecContext * codec
Codec context associated with this stream.
Definition:
avformat.h:861
AVOutputFormat::name
const char * name
Definition:
avformat.h:513
AVFMT_NOTIMESTAMPS
#define AVFMT_NOTIMESTAMPS
Format does not need / have any timestamps.
Definition:
avformat.h:472
AVCodecContext::sample_rate
int sample_rate
samples per second
Definition:
avcodec.h:1985
AVFormatContext::pb
AVIOContext * pb
I/O context.
Definition:
avformat.h:1314
AVCodecContext
main external API structure.
Definition:
avcodec.h:1241
avio_wb16
void avio_wb16(AVIOContext *s, unsigned int val)
Definition:
aviobuf.c:422
daud_write_header
static int daud_write_header(struct AVFormatContext *s)
Definition:
daudenc.c:24
avformat.h
Main libavformat public API header.
AVOutputFormat
Definition:
avformat.h:512
AVCodecContext::channels
int channels
number of audio channels
Definition:
avcodec.h:1986
AVPacket
This structure stores compressed data.
Definition:
avcodec.h:1139
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