0,0 → 1,50 |
/* |
* 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; |
} |