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libavformat
ircamenc.c
Go to the documentation of this file.
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/*
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* IRCAM muxer
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* Copyright (c) 2012 Paul B Mahol
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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 "
libavutil/intreadwrite.h
"
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#include "
avformat.h
"
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#include "
avio_internal.h
"
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#include "
internal.h
"
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#include "
rawenc.h
"
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#include "
ircam.h
"
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static
int
ircam_write_header
(
AVFormatContext
*
s
)
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{
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AVCodecContext
*codec = s->
streams
[0]->
codec
;
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uint32_t
tag
;
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if
(s->
nb_streams
!= 1) {
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av_log
(s,
AV_LOG_ERROR
,
"only one stream is supported\n"
);
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return
AVERROR
(EINVAL);
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}
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tag =
ff_codec_get_tag
(
ff_codec_ircam_le_tags
, codec->
codec_id
);
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if
(!tag) {
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av_log
(s,
AV_LOG_ERROR
,
"unsupported codec\n"
);
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return
AVERROR
(EINVAL);
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}
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avio_wl32
(s->
pb
, 0x0001A364);
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avio_wl32
(s->
pb
,
av_float2int
(codec->
sample_rate
));
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avio_wl32
(s->
pb
, codec->
channels
);
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avio_wl32
(s->
pb
, tag);
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ffio_fill
(s->
pb
, 0, 1008);
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return
0;
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}
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AVOutputFormat
ff_ircam_muxer
= {
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.
name
=
"ircam"
,
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.extensions =
"sf,ircam"
,
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.long_name =
NULL_IF_CONFIG_SMALL
(
"Berkeley/IRCAM/CARL Sound Format"
),
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.audio_codec =
AV_CODEC_ID_PCM_S16LE
,
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.video_codec =
AV_CODEC_ID_NONE
,
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.write_header =
ircam_write_header
,
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.write_packet =
ff_raw_write_packet
,
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.codec_tag = (
const
AVCodecTag
*
const
[]){
ff_codec_ircam_le_tags
, 0 },
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};
Generated on Sun Sep 14 2014 18:56:12 for FFmpeg by
1.8.2