mirror of
https://github.com/pineappleEA/pineapple-src.git
synced 2024-11-29 20:28:25 -05:00
51 lines
1.4 KiB
C
51 lines
1.4 KiB
C
|
/*
|
||
|
|
* MPEG Audio common code
|
||
|
|
* Copyright (c) 2001, 2002 Fabrice Bellard
|
||
|
|
*
|
||
|
|
* 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
|
||
|
|
*/
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @file
|
||
|
|
* MPEG Audio common code.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "mpegaudio.h"
|
||
|
|
|
||
|
|
|
||
|
|
/* bitrate is in kb/s */
|
||
|
|
int ff_mpa_l2_select_table(int bitrate, int nb_channels, int freq, int lsf)
|
||
|
|
{
|
||
|
|
int ch_bitrate, table;
|
||
|
|
|
||
|
|
ch_bitrate = bitrate / nb_channels;
|
||
|
|
if (!lsf) {
|
||
|
|
if ((freq == 48000 && ch_bitrate >= 56) ||
|
||
|
|
(ch_bitrate >= 56 && ch_bitrate <= 80))
|
||
|
|
table = 0;
|
||
|
|
else if (freq != 48000 && ch_bitrate >= 96)
|
||
|
|
table = 1;
|
||
|
|
else if (freq != 32000 && ch_bitrate <= 48)
|
||
|
|
table = 2;
|
||
|
|
else
|
||
|
|
table = 3;
|
||
|
|
} else {
|
||
|
|
table = 4;
|
||
|
|
}
|
||
|
|
return table;
|
||
|
|
}
|