FFmpeg
libavformat
flacenc_header.c
Go to the documentation of this file.
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/*
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* raw FLAC muxer
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* Copyright (C) 2009 Justin Ruggles
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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/channel_layout.h
"
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#include "
libavcodec/flac.h
"
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#include "
avformat.h
"
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#include "
flacenc.h
"
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int
ff_flac_write_header
(
AVIOContext
*pb,
const
uint8_t *extradata,
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int
extradata_size,
int
last_block)
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{
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uint8_t
header
[8] = {
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0x66, 0x4C, 0x61, 0x43, 0x00, 0x00, 0x00, 0x22
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};
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header
[4] = last_block ? 0x80 : 0x00;
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if
(extradata_size <
FLAC_STREAMINFO_SIZE
)
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return
AVERROR_INVALIDDATA
;
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/* write "fLaC" stream marker and first metadata block header */
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avio_write
(pb,
header
, 8);
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/* write STREAMINFO */
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avio_write
(pb, extradata,
FLAC_STREAMINFO_SIZE
);
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return
0;
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}
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int
ff_flac_is_native_layout
(uint64_t channel_layout)
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{
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if
(channel_layout ==
AV_CH_LAYOUT_MONO
||
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channel_layout ==
AV_CH_LAYOUT_STEREO
||
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channel_layout ==
AV_CH_LAYOUT_SURROUND
||
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channel_layout ==
AV_CH_LAYOUT_QUAD
||
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channel_layout ==
AV_CH_LAYOUT_5POINT0
||
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channel_layout ==
AV_CH_LAYOUT_5POINT1
||
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channel_layout ==
AV_CH_LAYOUT_6POINT1
||
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channel_layout ==
AV_CH_LAYOUT_7POINT1
)
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return
1;
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return
0;
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}
AV_CH_LAYOUT_6POINT1
#define AV_CH_LAYOUT_6POINT1
Definition:
channel_layout.h:235
AV_CH_LAYOUT_MONO
#define AV_CH_LAYOUT_MONO
Definition:
channel_layout.h:217
ff_flac_is_native_layout
int ff_flac_is_native_layout(uint64_t channel_layout)
Definition:
flacenc_header.c:50
flacenc.h
AV_CH_LAYOUT_STEREO
#define AV_CH_LAYOUT_STEREO
Definition:
channel_layout.h:218
AV_CH_LAYOUT_QUAD
#define AV_CH_LAYOUT_QUAD
Definition:
channel_layout.h:226
ff_flac_write_header
int ff_flac_write_header(AVIOContext *pb, const uint8_t *extradata, int extradata_size, int last_block)
Definition:
flacenc_header.c:29
AV_CH_LAYOUT_5POINT1
#define AV_CH_LAYOUT_5POINT1
Definition:
channel_layout.h:228
FLAC_STREAMINFO_SIZE
#define FLAC_STREAMINFO_SIZE
Definition:
flac.h:32
AVIOContext
Bytestream IO Context.
Definition:
avio.h:160
header
static const uint8_t header[24]
Definition:
sdr2.c:68
avio_write
void avio_write(AVIOContext *s, const unsigned char *buf, int size)
Definition:
aviobuf.c:201
AV_CH_LAYOUT_5POINT0
#define AV_CH_LAYOUT_5POINT0
Definition:
channel_layout.h:227
AV_CH_LAYOUT_7POINT1
#define AV_CH_LAYOUT_7POINT1
Definition:
channel_layout.h:240
AV_CH_LAYOUT_SURROUND
#define AV_CH_LAYOUT_SURROUND
Definition:
channel_layout.h:221
avformat.h
channel_layout.h
AVERROR_INVALIDDATA
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition:
error.h:61
flac.h
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