lib/bladeenc/l3psy.h

   1 /*
   2                         (c) Copyright 1998-2001 - Tord Jansson
   3                         ======================================
   4
   5                 This file is part of the BladeEnc MP3 Encoder, based on
   6                 ISO's reference code for MPEG Layer 3 compression, and might
   7                 contain smaller or larger sections that are directly taken
   8                 from ISO's reference code.
   9
  10                 All changes to the ISO reference code herein are either
  11                 copyrighted by Tord Jansson (tord.jansson@swipnet.se)
  12                 or sublicensed to Tord Jansson by a third party.
  13
  14         BladeEnc is free software; you can redistribute this file
  15         and/or modify it under the terms of the GNU Lesser General Public
  16         License as published by the Free Software Foundation; either
  17         version 2.1 of the License, or (at your option) any later version.
  18
  19
  20
  21         ------------    Changes    ------------
  22
  23         2000-12-11  Andre Piotrowski
  24
  25         -       reformatted
  26
  27         2000-12-12  ap
  28
  29         -       removed fft() prototype from "encoder.h" to this file
  30         -       removed the fft configuration switches from "subs.c" to this file
  31         -       implemented ORG_SHORT_CW_LIMIT
  32
  33         2001-01-12  ap
  34
  35         -       bug fix: include encoder.h for definition of ORG_BUFFERS
  36         -       clear some backward compatability flags for 0.93.10
  37 */
  38
  39 /**********************************************************************
  40  * ISO MPEG Audio Subgroup Software Simulation Group (1996)
  41  * ISO 13818-3 MPEG-2 Audio Encoder - Lower Sampling Frequency Extension
  42  *
  43  * $Id: l3psy.h,v 1.1 2002/01/10 17:30:00 kramm Exp $
  44  *
  45
  46  * $Log: l3psy.h,v $
  47  * Revision 1.1  2002/01/10 17:30:00  kramm
  48  * Version 0.94.1 of the bladeenc mp3 encoder
  49  *
  50  * Revision 1.1  1996/02/14 04:04:23  rowlands
  51  * Initial revision
  52  *
  53  * Received from Mike Coleman
  54  **********************************************************************/
  55
  56 #ifndef         __L3PSY__
  57 #define         __L3PSY__
  58
  59
  60
  61 #include        "encoder.h"
  62
  63
  64
  65
  66
  67 /*  ========================================================================================  */
  68 /*              keeping backward compatability                                                */
  69 /*  ========================================================================================  */
  70
  71 #define         ORG_NUMLINES_NORM               0   /* 0 = don't overwrite long numline entries with short numline entries */
  72 #define         ORG_BLOCK_SELECT                0   /* 0 = ISO draft paper states slightly different block selection */
  73 #define         ORG_SHORT_CW_LIMIT              0   /* 0 = ISO draft paper says first element starts at 6/4 = 1 (not 2) */
  74
  75
  76
  77
  78
  79 /*      #define         CBANDS                                    63 */
  80 #define         CBANDS_s                                42
  81 #define         BLKSIZE_s                               256
  82 #define         HBLKSIZE_s                              129
  83 #define         TCBMAX_l                                63
  84 #define         TCBMAX_s                                42
  85 #define         SBMAX_l                                 21
  86 #define         SBMAX_s                                 12
  87
  88
  89
  90 /*      #define         switch_pe                               1800 */
  91 #define         NORM_TYPE                               0
  92 #define         START_TYPE                              1
  93 #define         SHORT_TYPE                              2
  94 #define         STOP_TYPE                               3
  95
  96
  97
  98
  99
 100 void                                    psycho_anal
 101 (
 102 #if ORG_BUFFERS
 103         short int                               *buffer,
 104         short int                               savebuf[2048],
 105 #else
 106         FLOAT                                   *buffer,
 107         int                                             buffer_idx,
 108 #endif
 109         int                                             ch,
 110         int                                             lay,
 111 /*      FLOAT                                   snr32[32], */
 112         double                                  ratio_d[SBMAX_l],
 113         double                                  ratio_ds[SBMAX_s][3],
 114         double                                  *pe,
 115         gr_info                                 *cod_info
 116 );
 117
 118 void                                    psycho_anal_init (double sfreq);
 119
 120 void                                    psycho_anal_exit (void);
 121
 122
 123
 124
 125
 126 void                                    fft (FLOAT[], FLOAT[], FLOAT[], FLOAT[], int);
 127
 128
 129
 130 /*
 131         Switches for configuring the fft in "subs.c"
 132 */
 133
 134 /* Do we want to reorder the data? */
 135 #define         REORDER_DATA        0   /* no need to do that */
 136
 137 /* To get the inverse fft, set NORMAL_FFT to 0 */
 138 #define         NORMAL_FFT                      1   /* si */
 139
 140 /* Try this to speed up the fft when using non-complex sequences */
 141 #define         REAL_SEQUENCE           1   /* no complex values needed */
 142
 143 /* We assume, the real data gets prepacked externally */
 144 #define         PREPACKED                       1   /* yes */
 145
 146 /* No one needs all the phi values in layer 3 !!! */
 147 #define         USED_VALUES_ONLY        1
 148 #define         LONG_FFT_MIN_IDX        0
 149 #define         LONG_FFT_MAX_IDX        5
 150 #if ORG_SHORT_CW_LIMIT
 151 #define         SHORT_FFT_MIN_IDX       2    /* (  6+2)/4     */
 152 #define         SHORT_FFT_MAX_IDX       51   /* (206+2)/4 - 1 */
 153 #else   /* according to ISO */
 154 #define         SHORT_FFT_MIN_IDX       1    /*   6/4     */
 155 #define         SHORT_FFT_MAX_IDX       50   /* 206/4 - 1 */
 156 #endif
 157
 158
 159
 160
 161
 162 #endif          /* __L3PSY__ */