lib/bladeenc/loop-pvt.h

   1 /*
   2                         (c) Copyright 1998-2000 - 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         2000-02-15  Pirandot
  24
  25         -       reformatted, used 'static', less parameters
  26
  27         2000-12-03  ap
  28         -       adapted according to changes to "loop.h"
  29 */
  30
  31 #ifndef         __LOOP_PVT__
  32 #define         __LOOP_PVT__
  33
  34
  35
  36
  37
  38 static  int                             outer_loop
  39 (
  40         int                                             max_bits,
  41         frame_params                    *fr_ps
  42 );
  43
  44 static  int                             needed_bits_for_storing_scalefactors
  45 (
  46         frame_params                    *fr_ps
  47 );
  48
  49 static  void                    calc_noise (void);
  50
  51 static  int                             loop_break (void);
  52
  53 static  int                             amplify
  54 (
  55         int                                             iteration
  56 );
  57
  58 static  int INLINE              cutting_crew (FLOAT in);
  59
  60 static  void                    quantize (void);
  61
  62 static  void                    partial_quantize (void);
  63
  64 static  int                             bin_search_StepSize
  65 (
  66         int                                             desired_rate,
  67         double                                  start
  68 );
  69
  70
  71
  72 /*  ------------    bit counting    --------------------------------------------------------  */
  73
  74
  75
  76 static  int                             count_bits (void);
  77
  78 static  int                             count_bits_short (void);
  79
  80 static  int                             count_bits_long (void);
  81
  82 static  void                    choose_table_long
  83 (
  84         unsigned                                start,
  85         unsigned                                end,
  86         unsigned                                max,
  87         unsigned                                *table,
  88         unsigned                                *bit_sum
  89 );
  90
  91 static  void                    choose_table_short
  92 (
  93         unsigned                                start_sfb,
  94         unsigned                                end_sfb,
  95         unsigned                                max,
  96         unsigned                                *table,
  97         unsigned                                *bit_sum
  98 );
  99
 100
 101
 102 /*  ------------    Huffmania    -----------------------------------------------------------  */
 103
 104
 105
 106 static  void                    single_Huffman
 107 (
 108         unsigned                                start,
 109         unsigned                                end,
 110 /*      unsigned                                table0, == 1 */
 111         unsigned                                *choice,
 112         unsigned                                *sum
 113 );
 114
 115 static  void                    double_Huffman
 116 (
 117         unsigned                                start,
 118         unsigned                                end,
 119         unsigned                                table0,   /* 2, 5, 13 */
 120         unsigned                                table1,   /* 3, 6, 15 */
 121         unsigned                                *choice,
 122         unsigned                                *sum
 123 );
 124
 125 static  void                    triple_Huffman
 126 (
 127         unsigned                                start,
 128         unsigned                                end,
 129         unsigned                                table0,   /* 7, 10 */
 130         unsigned                                table1,   /* 8, 11 */
 131         unsigned                                table2,   /* 9, 12 */
 132         unsigned                                *choice,
 133         unsigned                                *sum
 134 );
 135
 136 static  void                    triple_Huffman_2
 137 (
 138         unsigned                                start,
 139         unsigned                                end,
 140 /*      unsigned                                table0,   == 13 */
 141 /*      unsigned                                table1,   == 15 */
 142 /*      unsigned                                table2,   == 24 */
 143         unsigned                                *choice,
 144         unsigned                                *sum
 145 );
 146
 147 static  void                    double_Huffman_2   /* Escape tables */
 148 (
 149         unsigned                                start,
 150         unsigned                                end,
 151         unsigned                                table0,   /* 16... */
 152         unsigned                                table1,   /* 24... */
 153         unsigned                                *choice,
 154         unsigned                                *sum
 155 );
 156
 157
 158
 159 /*  ------------    the struggle continues    ----------------------------------------------  */
 160
 161
 162
 163 static  void                    tiny_single_Huffman
 164 (
 165         unsigned                                start,
 166         unsigned                                end,
 167 #if ORG_HUFFMAN_CODING
 168         unsigned                                table0,
 169 #else
 170 /*      unsigned                                table0, == 1 */
 171 #endif
 172         unsigned                                *choice,
 173         unsigned                                *sum
 174 );
 175
 176 static  void                    tiny_double_Huffman
 177 (
 178         unsigned                                start,
 179         unsigned                                end,
 180         unsigned                                table0,   /* 2, 5, 13 */
 181         unsigned                                table1,   /* 3, 6, 15 */
 182         unsigned                                *choice,
 183         unsigned                                *sum
 184 );
 185
 186 static  void                    tiny_triple_Huffman
 187 (
 188         unsigned                                start,
 189         unsigned                                end,
 190         unsigned                                table0,   /* 7, 10 */
 191         unsigned                                table1,   /* 8, 11 */
 192         unsigned                                table2,   /* 9, 12 */
 193         unsigned                                *choice,
 194         unsigned                                *sum
 195 );
 196
 197 static  void                    tiny_triple_Huffman_2
 198 (
 199         unsigned                                start,
 200         unsigned                                end,
 201 /*      unsigned                                table0,   == 13 */
 202 /*      unsigned                                table1,   == 15 */
 203 /*      unsigned                                table2,   == 24 */
 204         unsigned                                *choice,
 205         unsigned                                *sum
 206 );
 207
 208 static  void                    tiny_double_Huffman_2   /* Escape tables */
 209 (
 210         unsigned                                start,
 211         unsigned                                end,
 212         unsigned                                table0,   /* 16... */
 213         unsigned                                table1,   /* 24... */
 214         unsigned                                *choice,
 215         unsigned                                *sum
 216 );
 217
 218
 219
 220
 221
 222 #endif          /* __LOOP_PVT__ */