2006-09-10 14:02:42 +00:00
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/*
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* copyright (c) 2001 Fabrice Bellard
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*
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2006-10-07 15:30:46 +00:00
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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2006-09-10 14:02:42 +00:00
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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2006-10-07 15:30:46 +00:00
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* version 2.1 of the License, or (at your option) any later version.
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2006-09-10 14:02:42 +00:00
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*
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2006-10-07 15:30:46 +00:00
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* FFmpeg is distributed in the hope that it will be useful,
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2006-09-10 14:02:42 +00:00
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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2006-10-07 15:30:46 +00:00
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* License along with FFmpeg; if not, write to the Free Software
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2006-09-10 14:02:42 +00:00
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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2003-03-06 11:32:04 +00:00
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/**
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2010-04-20 14:45:34 +00:00
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* @file
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2003-03-06 11:32:04 +00:00
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* mpeg audio declarations for both encoder and decoder.
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*/
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2001-09-15 22:42:25 +00:00
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2008-08-31 07:39:47 +00:00
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#ifndef AVCODEC_MPEGAUDIO_H
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#define AVCODEC_MPEGAUDIO_H
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2007-05-20 13:40:07 +00:00
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2010-05-11 19:52:42 +00:00
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#ifndef CONFIG_FLOAT
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# define CONFIG_FLOAT 0
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#endif
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2011-05-19 12:44:11 +00:00
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#include <stdint.h>
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2007-05-20 13:40:07 +00:00
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2001-09-15 22:42:25 +00:00
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/* max frame size, in samples */
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2005-12-17 18:14:38 +00:00
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#define MPA_FRAME_SIZE 1152
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2001-07-22 14:18:56 +00:00
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/* max compressed frame size */
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2001-09-15 22:42:25 +00:00
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#define MPA_MAX_CODED_FRAME_SIZE 1792
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2001-07-22 14:18:56 +00:00
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#define MPA_MAX_CHANNELS 2
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#define SBLIMIT 32 /* number of subbands */
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2001-09-15 22:42:25 +00:00
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#define MPA_STEREO 0
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#define MPA_JSTEREO 1
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#define MPA_DUAL 2
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#define MPA_MONO 3
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2011-05-09 11:40:37 +00:00
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#ifndef FRAC_BITS
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2005-10-18 20:16:43 +00:00
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#define FRAC_BITS 23 /* fractional bits for sb_samples and dct */
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#define WFRAC_BITS 16 /* fractional bits for window */
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#endif
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2012-08-02 02:21:53 +00:00
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#define IMDCT_SCALAR 1.759
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2007-06-16 22:58:43 +00:00
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#define FRAC_ONE (1 << FRAC_BITS)
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#define FIX(a) ((int)((a) * FRAC_ONE))
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2010-05-11 19:52:42 +00:00
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#if CONFIG_FLOAT
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# define INTFLOAT float
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typedef float MPA_INT;
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2011-05-16 17:59:25 +00:00
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typedef float OUT_INT;
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2010-05-11 19:52:42 +00:00
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#elif FRAC_BITS <= 15
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# define INTFLOAT int
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2005-10-18 20:16:43 +00:00
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typedef int16_t MPA_INT;
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2011-05-16 17:59:25 +00:00
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typedef int16_t OUT_INT;
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2005-10-18 20:16:43 +00:00
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#else
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2010-05-11 19:52:42 +00:00
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# define INTFLOAT int
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2005-10-18 20:16:43 +00:00
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typedef int32_t MPA_INT;
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2011-05-16 17:59:25 +00:00
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typedef int16_t OUT_INT;
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2005-10-18 20:16:43 +00:00
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#endif
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2007-05-20 22:50:29 +00:00
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int ff_mpa_l2_select_table(int bitrate, int nb_channels, int freq, int lsf);
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2007-05-20 13:40:07 +00:00
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2008-08-31 07:39:47 +00:00
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#endif /* AVCODEC_MPEGAUDIO_H */
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