1 | /* |
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2 | * The simplest mpeg audio layer 2 encoder |
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3 | * Copyright (c) 2000, 2001 Fabrice Bellard. |
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4 | * |
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5 | * This routines are normaly part of FFmpeg and had been isolated |
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6 | * for use in DreamDVD by Seddi. |
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7 | * |
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8 | * FFmpeg is free software; you can redistribute it and/or |
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9 | * modify it under the terms of the GNU Lesser General Public |
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10 | * License as published by the Free Software Foundation; either |
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11 | * version 2.1 of the License, or (at your option) any later version. |
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12 | * |
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13 | * FFmpeg is distributed in the hope that it will be useful, |
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14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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16 | * Lesser General Public License for more details. |
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17 | * |
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18 | * You should have received a copy of the GNU Lesser General Public |
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19 | * License along with FFmpeg; if not, write to the Free Software |
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20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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21 | * |
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22 | * part of libdreamdvd |
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23 | */ |
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24 | |
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25 | #ifndef __MPEGAUDIO_ENC_H__ |
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26 | |
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27 | #define __MPEGAUDIO_ENC_H__ |
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28 | |
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29 | #include <stdint.h> |
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30 | #include <inttypes.h> |
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31 | #include <stdlib.h> |
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32 | #include <stdio.h> |
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33 | #include <string.h> |
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34 | #include <assert.h> |
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35 | #include <byteswap.h> |
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36 | #include <math.h> |
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37 | |
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38 | #define FLOOR(a) ((int)(a) - ((a) < 0 && (a) != (int)(a))) |
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39 | #define SQRT2 1.41421356237309514547 |
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40 | #define FRAC_BITS 15 /* fractional bits for sb_samples and dct */ |
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41 | #define WFRAC_BITS 14 /* fractional bits for window */ |
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42 | #define FRAC_ONE (1 << FRAC_BITS) |
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43 | #define MUL(a,b) (((int64_t)(a) * (int64_t)(b)) >> FRAC_BITS) |
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44 | #define FIX(a) ((int)((a) * FRAC_ONE)) |
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45 | #define WSHIFT (WFRAC_BITS + 15 - FRAC_BITS) |
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46 | #define MPA_MAX_CHANNELS 2 |
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47 | |
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48 | #define SBLIMIT 32 /* number of subbands */ |
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49 | /* max frame size, in samples */ |
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50 | #define MPA_FRAME_SIZE 1152 |
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51 | |
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52 | /* max compressed frame size */ |
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53 | #define MPA_MAX_CODED_FRAME_SIZE 1792 |
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54 | #define SAMPLES_BUF_SIZE 4096 |
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55 | #define NB_CHANNELS 2 |
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56 | #define MPA_MAX_CODED_FRAME_SIZE 1792 |
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57 | #define MPA_STEREO 0 |
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58 | #define MPA_MONO 3 |
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59 | |
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60 | static const int ddvd_mpa_costab32[30] = { |
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61 | FIX(0.54119610014619701222), |
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62 | FIX(1.3065629648763763537), |
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63 | |
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64 | FIX(0.50979557910415917998), |
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65 | FIX(2.5629154477415054814), |
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66 | FIX(0.89997622313641556513), |
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67 | FIX(0.60134488693504528634), |
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68 | |
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69 | FIX(0.5024192861881556782), |
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70 | FIX(5.1011486186891552563), |
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71 | FIX(0.78815462345125020249), |
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72 | FIX(0.64682178335999007679), |
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73 | FIX(0.56694403481635768927), |
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74 | FIX(1.0606776859903470633), |
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75 | FIX(1.7224470982383341955), |
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76 | FIX(0.52249861493968885462), |
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77 | |
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78 | FIX(10.19000812354803287), |
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79 | FIX(0.674808341455005678), |
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80 | FIX(1.1694399334328846596), |
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81 | FIX(0.53104259108978413284), |
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82 | FIX(2.0577810099534108446), |
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83 | FIX(0.58293496820613388554), |
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84 | FIX(0.83934964541552681272), |
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85 | FIX(0.50547095989754364798), |
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86 | FIX(3.4076084184687189804), |
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87 | FIX(0.62250412303566482475), |
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88 | FIX(0.97256823786196078263), |
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89 | FIX(0.51544730992262455249), |
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90 | FIX(1.4841646163141661852), |
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91 | FIX(0.5531038960344445421), |
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92 | FIX(0.74453627100229857749), |
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93 | FIX(0.5006029982351962726), |
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94 | }; |
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95 | |
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96 | static const int ddvd_mpa_bitinv32[32] = { |
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97 | 0, 16, 8, 24, 4, 20, 12, 28, |
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98 | 2, 18, 10, 26, 6, 22, 14, 30, |
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99 | 1, 17, 9, 25, 5, 21, 13, 29, |
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100 | 3, 19, 11, 27, 7, 23, 15, 31 |
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101 | }; |
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102 | |
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103 | |
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104 | static int16_t ddvd_mpa_filter_bank[512]; |
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105 | |
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106 | const uint16_t ddvd_mpa_ff_mpa_freq_tab[3] = { 44100, 48000, 32000 }; |
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107 | |
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108 | const int ddvd_mpa_ff_mpa_quant_steps[17] = { |
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109 | 3, 5, 7, 9, 15, |
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110 | 31, 63, 127, 255, 511, |
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111 | 1023, 2047, 4095, 8191, 16383, |
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112 | 32767, 65535 |
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113 | }; |
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114 | |
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115 | const uint16_t ddvd_mpa_ff_mpa_bitrate_tab[2][3][15] = { |
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116 | { {0, 32, 64, 96, 128, 160, 192, 224, 256, 288, 320, 352, 384, 416, 448 }, |
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117 | {0, 32, 48, 56, 64, 80, 96, 112, 128, 160, 192, 224, 256, 320, 384 }, |
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118 | {0, 32, 40, 48, 56, 64, 80, 96, 112, 128, 160, 192, 224, 256, 320 } }, |
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119 | { {0, 32, 48, 56, 64, 80, 96, 112, 128, 144, 160, 176, 192, 224, 256}, |
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120 | {0, 8, 16, 24, 32, 40, 48, 56, 64, 80, 96, 112, 128, 144, 160}, |
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121 | {0, 8, 16, 24, 32, 40, 48, 56, 64, 80, 96, 112, 128, 144, 160} |
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122 | } |
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123 | }; |
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124 | |
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125 | int ddvd_mpa_ff_mpa_l2_select_table(int bitrate, int nb_channels, int freq, int lsf) |
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126 | { |
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127 | int ch_bitrate, table; |
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128 | |
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129 | ch_bitrate = bitrate / nb_channels; |
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130 | if (!lsf) { |
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131 | if ((freq == 48000 && ch_bitrate >= 56) || |
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132 | (ch_bitrate >= 56 && ch_bitrate <= 80)) |
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133 | table = 0; |
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134 | else if (freq != 48000 && ch_bitrate >= 96) |
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135 | table = 1; |
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136 | else if (freq != 32000 && ch_bitrate <= 48) |
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137 | table = 2; |
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138 | else |
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139 | table = 3; |
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140 | } else { |
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141 | table = 4; |
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142 | } |
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143 | return table; |
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144 | } |
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145 | |
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146 | const int ddvd_mpa_ff_mpa_sblimit_table[5] = { 27 , 30 , 8, 12 , 30 }; |
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147 | |
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148 | /* encoding tables which give the quantization index. Note how it is |
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149 | possible to store them efficiently ! */ |
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150 | static const unsigned char ddvd_mpa_alloc_table_0[] = { |
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151 | 4, 0, 2, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, |
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152 | 4, 0, 2, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, |
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153 | 4, 0, 2, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, |
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154 | 4, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 16, |
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155 | 4, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 16, |
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156 | 4, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 16, |
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157 | 4, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 16, |
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158 | 4, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 16, |
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159 | 4, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 16, |
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160 | 4, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 16, |
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161 | 4, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 16, |
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162 | 3, 0, 1, 2, 3, 4, 5, 16, |
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163 | 3, 0, 1, 2, 3, 4, 5, 16, |
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164 | 3, 0, 1, 2, 3, 4, 5, 16, |
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165 | 3, 0, 1, 2, 3, 4, 5, 16, |
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166 | 3, 0, 1, 2, 3, 4, 5, 16, |
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167 | 3, 0, 1, 2, 3, 4, 5, 16, |
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168 | 3, 0, 1, 2, 3, 4, 5, 16, |
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169 | 3, 0, 1, 2, 3, 4, 5, 16, |
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170 | 3, 0, 1, 2, 3, 4, 5, 16, |
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171 | 3, 0, 1, 2, 3, 4, 5, 16, |
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172 | 3, 0, 1, 2, 3, 4, 5, 16, |
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173 | 3, 0, 1, 2, 3, 4, 5, 16, |
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174 | 2, 0, 1, 16, |
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175 | 2, 0, 1, 16, |
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176 | 2, 0, 1, 16, |
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177 | 2, 0, 1, 16, |
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178 | }; |
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179 | |
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180 | static const unsigned char ddvd_mpa_alloc_table_1[] = { |
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181 | 4, 0, 2, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, |
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182 | 4, 0, 2, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, |
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183 | 4, 0, 2, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, |
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184 | 4, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 16, |
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185 | 4, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 16, |
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186 | 4, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 16, |
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187 | 4, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 16, |
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188 | 4, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 16, |
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189 | 4, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 16, |
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190 | 4, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 16, |
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191 | 4, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 16, |
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192 | 3, 0, 1, 2, 3, 4, 5, 16, |
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193 | 3, 0, 1, 2, 3, 4, 5, 16, |
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194 | 3, 0, 1, 2, 3, 4, 5, 16, |
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195 | 3, 0, 1, 2, 3, 4, 5, 16, |
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196 | 3, 0, 1, 2, 3, 4, 5, 16, |
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197 | 3, 0, 1, 2, 3, 4, 5, 16, |
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198 | 3, 0, 1, 2, 3, 4, 5, 16, |
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199 | 3, 0, 1, 2, 3, 4, 5, 16, |
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200 | 3, 0, 1, 2, 3, 4, 5, 16, |
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201 | 3, 0, 1, 2, 3, 4, 5, 16, |
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202 | 3, 0, 1, 2, 3, 4, 5, 16, |
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203 | 3, 0, 1, 2, 3, 4, 5, 16, |
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204 | 2, 0, 1, 16, |
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205 | 2, 0, 1, 16, |
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206 | 2, 0, 1, 16, |
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207 | 2, 0, 1, 16, |
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208 | 2, 0, 1, 16, |
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209 | 2, 0, 1, 16, |
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210 | 2, 0, 1, 16, |
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211 | }; |
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212 | |
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213 | static const unsigned char ddvd_mpa_alloc_table_2[] = { |
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214 | 4, 0, 1, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, |
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215 | 4, 0, 1, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, |
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216 | 3, 0, 1, 3, 4, 5, 6, 7, |
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217 | 3, 0, 1, 3, 4, 5, 6, 7, |
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218 | 3, 0, 1, 3, 4, 5, 6, 7, |
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219 | 3, 0, 1, 3, 4, 5, 6, 7, |
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220 | 3, 0, 1, 3, 4, 5, 6, 7, |
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221 | 3, 0, 1, 3, 4, 5, 6, 7, |
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222 | }; |
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223 | |
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224 | static const unsigned char ddvd_mpa_alloc_table_3[] = { |
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225 | 4, 0, 1, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, |
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226 | 4, 0, 1, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, |
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227 | 3, 0, 1, 3, 4, 5, 6, 7, |
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228 | 3, 0, 1, 3, 4, 5, 6, 7, |
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229 | 3, 0, 1, 3, 4, 5, 6, 7, |
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230 | 3, 0, 1, 3, 4, 5, 6, 7, |
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231 | 3, 0, 1, 3, 4, 5, 6, 7, |
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232 | 3, 0, 1, 3, 4, 5, 6, 7, |
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233 | 3, 0, 1, 3, 4, 5, 6, 7, |
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234 | 3, 0, 1, 3, 4, 5, 6, 7, |
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235 | 3, 0, 1, 3, 4, 5, 6, 7, |
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236 | 3, 0, 1, 3, 4, 5, 6, 7, |
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237 | }; |
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238 | |
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239 | static const unsigned char ddvd_mpa_alloc_table_4[] = { |
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240 | 4, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, |
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241 | 4, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, |
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242 | 4, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, |
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243 | 4, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, |
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244 | 3, 0, 1, 3, 4, 5, 6, 7, |
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245 | 3, 0, 1, 3, 4, 5, 6, 7, |
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246 | 3, 0, 1, 3, 4, 5, 6, 7, |
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247 | 3, 0, 1, 3, 4, 5, 6, 7, |
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248 | 3, 0, 1, 3, 4, 5, 6, 7, |
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249 | 3, 0, 1, 3, 4, 5, 6, 7, |
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250 | 3, 0, 1, 3, 4, 5, 6, 7, |
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251 | 2, 0, 1, 3, |
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252 | 2, 0, 1, 3, |
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253 | 2, 0, 1, 3, |
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254 | 2, 0, 1, 3, |
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255 | 2, 0, 1, 3, |
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256 | 2, 0, 1, 3, |
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257 | 2, 0, 1, 3, |
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258 | 2, 0, 1, 3, |
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259 | 2, 0, 1, 3, |
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260 | 2, 0, 1, 3, |
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261 | 2, 0, 1, 3, |
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262 | 2, 0, 1, 3, |
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263 | 2, 0, 1, 3, |
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264 | 2, 0, 1, 3, |
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265 | 2, 0, 1, 3, |
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266 | 2, 0, 1, 3, |
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267 | 2, 0, 1, 3, |
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268 | 2, 0, 1, 3, |
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269 | 2, 0, 1, 3, |
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270 | }; |
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271 | |
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272 | const unsigned char *ddvd_mpa_ff_mpa_alloc_tables[5] = |
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273 | { ddvd_mpa_alloc_table_0, ddvd_mpa_alloc_table_1, ddvd_mpa_alloc_table_2, ddvd_mpa_alloc_table_3, ddvd_mpa_alloc_table_4, }; |
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274 | |
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275 | |
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276 | const int32_t ddvd_mpa_ff_mpa_enwindow[257] = { |
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277 | 0, -1, -1, -1, -1, -1, -1, -2, |
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278 | -2, -2, -2, -3, -3, -4, -4, -5, |
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279 | -5, -6, -7, -7, -8, -9, -10, -11, |
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280 | -13, -14, -16, -17, -19, -21, -24, -26, |
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281 | -29, -31, -35, -38, -41, -45, -49, -53, |
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282 | -58, -63, -68, -73, -79, -85, -91, -97, |
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283 | -104, -111, -117, -125, -132, -139, -147, -154, |
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284 | -161, -169, -176, -183, -190, -196, -202, -208, |
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285 | 213, 218, 222, 225, 227, 228, 228, 227, |
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286 | 224, 221, 215, 208, 200, 189, 177, 163, |
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287 | 146, 127, 106, 83, 57, 29, -2, -36, |
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288 | -72, -111, -153, -197, -244, -294, -347, -401, |
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289 | -459, -519, -581, -645, -711, -779, -848, -919, |
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290 | -991, -1064, -1137, -1210, -1283, -1356, -1428, -1498, |
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291 | -1567, -1634, -1698, -1759, -1817, -1870, -1919, -1962, |
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292 | -2001, -2032, -2057, -2075, -2085, -2087, -2080, -2063, |
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293 | 2037, 2000, 1952, 1893, 1822, 1739, 1644, 1535, |
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294 | 1414, 1280, 1131, 970, 794, 605, 402, 185, |
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295 | -45, -288, -545, -814, -1095, -1388, -1692, -2006, |
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296 | -2330, -2663, -3004, -3351, -3705, -4063, -4425, -4788, |
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297 | -5153, -5517, -5879, -6237, -6589, -6935, -7271, -7597, |
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298 | -7910, -8209, -8491, -8755, -8998, -9219, -9416, -9585, |
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299 | -9727, -9838, -9916, -9959, -9966, -9935, -9863, -9750, |
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300 | -9592, -9389, -9139, -8840, -8492, -8092, -7640, -7134, |
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301 | 6574, 5959, 5288, 4561, 3776, 2935, 2037, 1082, |
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302 | 70, -998, -2122, -3300, -4533, -5818, -7154, -8540, |
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303 | -9975,-11455,-12980,-14548,-16155,-17799,-19478,-21189, |
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304 | -22929,-24694,-26482,-28289,-30112,-31947,-33791,-35640, |
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305 | -37489,-39336,-41176,-43006,-44821,-46617,-48390,-50137, |
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306 | -51853,-53534,-55178,-56778,-58333,-59838,-61289,-62684, |
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307 | -64019,-65290,-66494,-67629,-68692,-69679,-70590,-71420, |
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308 | -72169,-72835,-73415,-73908,-74313,-74630,-74856,-74992, |
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309 | 75038, |
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310 | }; |
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311 | |
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312 | |
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313 | static int ddvd_mpa_scale_factor_table[64]; |
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314 | static unsigned char ddvd_mpa_scale_diff_table[128]; |
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315 | static int8_t ddvd_mpa_scale_factor_shift[64]; |
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316 | static unsigned short ddvd_mpa_scale_factor_mult[64]; |
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317 | |
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318 | const uint8_t ddvd_mpa_ff_log2_tab[256]={ |
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319 | 0,0,1,1,2,2,2,2,3,3,3,3,3,3,3,3,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4, |
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320 | 5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5, |
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321 | 6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6, |
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322 | 6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6, |
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323 | 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7, |
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324 | 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7, |
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325 | 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7, |
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326 | 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7 |
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327 | }; |
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328 | |
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329 | static inline int ddvd_mpa_av_log2(unsigned int v) |
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330 | { |
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331 | int n; |
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332 | |
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333 | n = 0; |
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334 | if (v & 0xffff0000) { |
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335 | v >>= 16; |
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336 | n += 16; |
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337 | } |
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338 | if (v & 0xff00) { |
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339 | v >>= 8; |
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340 | n += 8; |
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341 | } |
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342 | n += ddvd_mpa_ff_log2_tab[v]; |
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343 | |
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344 | return n; |
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345 | } |
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346 | |
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347 | /* fixed psycho acoustic model. Values of SNR taken from the 'toolame' |
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348 | project */ |
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349 | static const float ddvd_mpa_fixed_smr[SBLIMIT] = { |
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350 | 30, 17, 16, 10, 3, 12, 8, 2.5, |
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351 | 5, 5, 6, 6, 5, 6, 10, 6, |
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352 | -4, -10, -21, -30, -42, -55, -68, -75, |
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353 | -75, -75, -75, -75, -91, -107, -110, -108 |
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354 | }; |
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355 | |
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356 | #define SB_NOTALLOCATED 0 |
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357 | #define SB_ALLOCATED 1 |
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358 | #define SB_NOMORE 2 |
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359 | |
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360 | |
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361 | |
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362 | /* total number of bits per allocation group */ |
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363 | static unsigned short ddvd_mpa_total_quant_bits[17]; |
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364 | |
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365 | static const unsigned short ddvd_mpa_quant_snr[17] = { |
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366 | 70, 110, 160, 208, |
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367 | 253, 316, 378, 439, |
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368 | 499, 559, 620, 680, |
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369 | 740, 800, 861, 920, |
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370 | 980 |
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371 | }; |
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372 | |
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373 | static const unsigned char ddvd_mpa_nb_scale_factors[4] = { 3, 2, 1, 2 }; |
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374 | |
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375 | const int ddvd_mpa_ff_mpa_quant_bits[17] = { |
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376 | -5, -7, 3, -10, 4, |
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377 | 5, 6, 7, 8, 9, |
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378 | 10, 11, 12, 13, 14, |
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379 | 15, 16 |
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380 | }; |
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381 | |
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382 | |
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383 | #if BYTE_ORDER == BIG_ENDIAN |
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384 | #define be2me_16(x) (x) |
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385 | #define be2me_32(x) (x) |
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386 | #define be2me_64(x) (x) |
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387 | #define le2me_16(x) bswap_16(x) |
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388 | #define le2me_32(x) bswap_32(x) |
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389 | #define le2me_64(x) bswap_64(x) |
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390 | #else |
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391 | #define be2me_16(x) bswap_16(x) |
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392 | #define be2me_32(x) bswap_32(x) |
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393 | #define be2me_64(x) bswap_64(x) |
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394 | #define le2me_16(x) (x) |
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395 | #define le2me_32(x) (x) |
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396 | #define le2me_64(x) (x) |
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397 | #endif |
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398 | |
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399 | typedef struct ddvd_mpa_PutBitContext { |
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400 | uint32_t bit_buf; |
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401 | int bit_left; |
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402 | uint8_t *buf, *buf_ptr, *buf_end; |
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403 | } ddvd_mpa_PutBitContext; |
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404 | |
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405 | |
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406 | static inline void ddvd_mpa_init_put_bits(ddvd_mpa_PutBitContext *s, uint8_t *buffer, int buffer_size) |
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407 | { |
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408 | if(buffer_size < 0) { |
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409 | buffer_size = 0; |
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410 | buffer = NULL; |
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411 | } |
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412 | |
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413 | s->buf = buffer; |
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414 | s->buf_end = s->buf + buffer_size; |
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415 | s->buf_ptr = s->buf; |
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416 | s->bit_left=32; |
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417 | s->bit_buf=0; |
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418 | } |
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419 | |
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420 | static inline uint8_t* ddvd_mpa_pbBufPtr(ddvd_mpa_PutBitContext *s) |
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421 | { |
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422 | return s->buf_ptr; |
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423 | } |
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424 | |
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425 | static inline void ddvd_mpa_flush_put_bits(ddvd_mpa_PutBitContext *s) |
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426 | { |
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427 | s->bit_buf<<= s->bit_left; |
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428 | while (s->bit_left < 32) { |
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429 | /* XXX: should test end of buffer */ |
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430 | *s->buf_ptr++=s->bit_buf >> 24; |
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431 | s->bit_buf<<=8; |
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432 | s->bit_left+=8; |
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433 | } |
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434 | s->bit_left=32; |
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435 | s->bit_buf=0; |
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436 | } |
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437 | |
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438 | |
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439 | |
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440 | static inline void ddvd_mpa_put_bits(ddvd_mpa_PutBitContext *s, int n, unsigned int value) |
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441 | { |
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442 | unsigned int bit_buf; |
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443 | int bit_left; |
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444 | |
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445 | // printf("put_bits=%d %x\n", n, value); |
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446 | assert(n == 32 || value < (1U << n)); |
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447 | |
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448 | bit_buf = s->bit_buf; |
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449 | bit_left = s->bit_left; |
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450 | |
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451 | // printf("n=%d value=%x cnt=%d buf=%x\n", n, value, bit_cnt, bit_buf); |
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452 | /* XXX: optimize */ |
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453 | if (n < bit_left) { |
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454 | bit_buf = (bit_buf<<n) | value; |
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455 | bit_left-=n; |
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456 | } else { |
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457 | bit_buf<<=bit_left; |
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458 | bit_buf |= value >> (n - bit_left); |
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459 | *(uint32_t *)s->buf_ptr = be2me_32(bit_buf); |
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460 | //printf("bitbuf = %08x\n", bit_buf); |
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461 | s->buf_ptr+=4; |
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462 | bit_left+=32 - n; |
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463 | bit_buf = value; |
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464 | } |
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465 | |
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466 | s->bit_buf = bit_buf; |
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467 | s->bit_left = bit_left; |
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468 | } |
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469 | |
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470 | |
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471 | int ddvd_mpa_samples_offset[MPA_MAX_CHANNELS]; /* offset in samples_buf */ |
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472 | int ddvd_mpa_sb_samples[MPA_MAX_CHANNELS][3][12][SBLIMIT]; |
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473 | short ddvd_mpa_samples_buf[MPA_MAX_CHANNELS][SAMPLES_BUF_SIZE]; /* buffer for filter */ |
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474 | int ddvd_mpa_sblimit; |
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475 | unsigned char ddvd_mpa_scale_factors[MPA_MAX_CHANNELS][SBLIMIT][3]; /* scale factors */ |
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476 | /* code to group 3 scale factors */ |
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477 | unsigned char ddvd_mpa_scale_code[MPA_MAX_CHANNELS][SBLIMIT]; |
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478 | int ddvd_mpa_frame_size; /* frame size, in bits, without padding */ |
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479 | int ddvd_mpa_frame_frac, ddvd_mpa_frame_frac_incr, ddvd_mpa_do_padding; |
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480 | const unsigned char *ddvd_mpa_alloc_table; |
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481 | ddvd_mpa_PutBitContext pb; |
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482 | int ddvd_mpa_lsf; /* 1 if mpeg2 low bitrate selected */ |
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483 | int ddvd_mpa_bitrate_index; /* bit rate */ |
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484 | int ddvd_mpa_freq_index; |
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485 | int ddvd_mpa_freq; |
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486 | int ddvd_mpa_bit_rate; |
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487 | int64_t ddvd_mpa_nb_samples; |
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488 | |
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489 | #endif |
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