mirror of https://github.com/FFmpeg/FFmpeg.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
63 lines
2.0 KiB
63 lines
2.0 KiB
/* |
|
* raw FLAC muxer |
|
* Copyright (C) 2009 Justin Ruggles |
|
* |
|
* This file is part of FFmpeg. |
|
* |
|
* FFmpeg 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. |
|
* |
|
* FFmpeg 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 FFmpeg; 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 "libavcodec/bytestream.h" |
|
#include "avformat.h" |
|
#include "flacenc.h" |
|
|
|
int ff_flac_write_header(AVIOContext *pb, AVCodecContext *codec, |
|
int last_block) |
|
{ |
|
uint8_t header[8] = { |
|
0x66, 0x4C, 0x61, 0x43, 0x00, 0x00, 0x00, 0x22 |
|
}; |
|
uint8_t *streaminfo; |
|
enum FLACExtradataFormat format; |
|
|
|
header[4] = last_block ? 0x80 : 0x00; |
|
if (!avpriv_flac_is_extradata_valid(codec, &format, &streaminfo)) |
|
return -1; |
|
|
|
/* write "fLaC" stream marker and first metadata block header */ |
|
avio_write(pb, header, 8); |
|
|
|
/* write STREAMINFO */ |
|
avio_write(pb, streaminfo, 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; |
|
}
|
|
|