63 lines
1.9 KiB
C
63 lines
1.9 KiB
C
/*
|
|
* raw FLAC muxer
|
|
* Copyright (C) 2009 Justin Ruggles
|
|
*
|
|
* 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 "libavcodec/flac.h"
|
|
|
|
#include "avformat.h"
|
|
#include "flacenc.h"
|
|
|
|
int ff_flac_write_header(AVIOContext *pb, uint8_t *extradata,
|
|
int extradata_size, int last_block)
|
|
{
|
|
uint8_t header[8] = {
|
|
0x66, 0x4C, 0x61, 0x43, 0x00, 0x00, 0x00, 0x22
|
|
};
|
|
|
|
header[4] = last_block ? 0x80 : 0x00;
|
|
|
|
if (extradata_size < FLAC_STREAMINFO_SIZE)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
/* write "fLaC" stream marker and first metadata block header */
|
|
avio_write(pb, header, 8);
|
|
|
|
/* write STREAMINFO */
|
|
avio_write(pb, extradata, FLAC_STREAMINFO_SIZE);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int ff_flac_is_native_layout(uint64_t channel_layout)
|
|
{
|
|
if (channel_layout == AV_CH_LAYOUT_MONO ||
|
|
channel_layout == AV_CH_LAYOUT_STEREO ||
|
|
channel_layout == AV_CH_LAYOUT_SURROUND ||
|
|
channel_layout == AV_CH_LAYOUT_QUAD ||
|
|
channel_layout == AV_CH_LAYOUT_5POINT0 ||
|
|
channel_layout == AV_CH_LAYOUT_5POINT1 ||
|
|
channel_layout == AV_CH_LAYOUT_6POINT1 ||
|
|
channel_layout == AV_CH_LAYOUT_7POINT1)
|
|
return 1;
|
|
return 0;
|
|
}
|