/*
  * copyright (c) 2001 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 declarations for both encoder and decoder.
  */

 #ifndef AVCODEC_MPEGAUDIO_H
 #define AVCODEC_MPEGAUDIO_H

 #ifndef USE_FLOATS
 #   define USE_FLOATS 0

 #endif
 

 #include <stdint.h>

 #include "libavutil/internal.h"

 /* max frame size, in samples */

 #define MPA_FRAME_SIZE 1152

 
 /* max compressed frame size */

 #define MPA_MAX_CODED_FRAME_SIZE 1792

 
 #define MPA_MAX_CHANNELS 2
 
 #define SBLIMIT 32 /* number of subbands */
 

 #define MPA_STEREO  0
 #define MPA_JSTEREO 1
 #define MPA_DUAL    2
 #define MPA_MONO    3
 

 #ifndef FRAC_BITS

 #define FRAC_BITS   23   /* fractional bits for sb_samples and dct */
 #define WFRAC_BITS  16   /* fractional bits for window */
 #endif
 

 #define IMDCT_SCALAR 1.759
 

 #define FRAC_ONE    (1 << FRAC_BITS)
 
 #define FIX(a)   ((int)((a) * FRAC_ONE))
 

 #if USE_FLOATS

 #   define INTFLOAT float

 #   define SUINTFLOAT float

 typedef float MPA_INT;

 typedef float OUT_INT;

 #elif FRAC_BITS <= 15
 #   define INTFLOAT int

 #   define SUINTFLOAT SUINT

 typedef int16_t MPA_INT;

 typedef int16_t OUT_INT;

 #else

 #   define INTFLOAT int

 #   define SUINTFLOAT SUINT

 typedef int32_t MPA_INT;

 typedef int16_t OUT_INT;

 #endif
 

 int ff_mpa_l2_select_table(int bitrate, int nb_channels, int freq, int lsf);

 #endif /* AVCODEC_MPEGAUDIO_H */