yading@10: /*
yading@10:  * MPEG Audio common code
yading@10:  * Copyright (c) 2001, 2002 Fabrice Bellard
yading@10:  *
yading@10:  * This file is part of FFmpeg.
yading@10:  *
yading@10:  * FFmpeg is free software; you can redistribute it and/or
yading@10:  * modify it under the terms of the GNU Lesser General Public
yading@10:  * License as published by the Free Software Foundation; either
yading@10:  * version 2.1 of the License, or (at your option) any later version.
yading@10:  *
yading@10:  * FFmpeg is distributed in the hope that it will be useful,
yading@10:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@10:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@10:  * Lesser General Public License for more details.
yading@10:  *
yading@10:  * You should have received a copy of the GNU Lesser General Public
yading@10:  * License along with FFmpeg; if not, write to the Free Software
yading@10:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@10:  */
yading@10: 
yading@10: /**
yading@10:  * @file
yading@10:  * MPEG Audio common code.
yading@10:  */
yading@10: 
yading@10: #include "mpegaudio.h"
yading@10: 
yading@10: 
yading@10: /* bitrate is in kb/s */
yading@10: int ff_mpa_l2_select_table(int bitrate, int nb_channels, int freq, int lsf)
yading@10: {
yading@10:     int ch_bitrate, table;
yading@10: 
yading@10:     ch_bitrate = bitrate / nb_channels;
yading@10:     if (!lsf) {
yading@10:         if ((freq == 48000 && ch_bitrate >= 56) ||
yading@10:             (ch_bitrate >= 56 && ch_bitrate <= 80))
yading@10:             table = 0;
yading@10:         else if (freq != 48000 && ch_bitrate >= 96)
yading@10:             table = 1;
yading@10:         else if (freq != 32000 && ch_bitrate <= 48)
yading@10:             table = 2;
yading@10:         else
yading@10:             table = 3;
yading@10:     } else {
yading@10:         table = 4;
yading@10:     }
yading@10:     return table;
yading@10: }