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A non-working implementation of floating point audio mixing.
author Matti Hamalainen <ccr@tnsp.org>
date Mon, 01 Oct 2012 03:48:21 +0300
parents 033c660c25f5
children 8725853609db
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1 /*
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2 * miniJSS - Mixing routines in C
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3 * Programmed and designed by Matti 'ccr' Hamalainen
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4 * (C) Copyright 2006-2007 Tecnic Software productions (TNSP)
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5 */
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6
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7 //#define JMIXER_DEBUG fprintf(stderr, "[%.8x:%.8x / %.8x]: %d\n", FP_GETH(tmpPos), FP_GETL(tmpPos), endPos, sp[FP_GETH(tmpPos)]);
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8 #define JMIXER_DEBUG
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9
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10 #ifndef JMIXER_ADDBUF_TYPE
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11 #ifdef JSS_MIX_FP
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12 #define JMIXER_ADDBUF_TYPE double
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13 #else
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14 #define JMIXER_ADDBUF_TYPE Sint32
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15 #endif
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16 #endif
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17
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18 /* Mono / Linear Interpolation
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19 */
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20 #ifdef JSS_MIX_FP
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21 #define JMIXER_SAMPLE_TYPE float
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22 #define JMIXER_INIT const float vol = (float) (chn->chVolume * mixer->globalVol) / (256.0f * 64.0f);
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23 #define JMIXER_FUNC tr = (sp[FP_GETH(tmpPos)] * vol + tr) / 2.0f; *(ap++) += tr;
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26 #define JMIXER_NAME jvmMix_Mono_C_FW
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27 #define JMIXER_NEXT FP_ADD(tmpPos, tmpDelta);
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28 #define JMIXER_ENDCOND (FP_GETH(tmpPos) < endPos)
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29 #include "jmixtmpl_c.h"
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31
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32 #define JMIXER_NAME jvmMix_Mono_C_BW
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33 #define JMIXER_NEXT FP_SUB(tmpPos, tmpDelta);
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34 #define JMIXER_ENDCOND (FP_GETH(tmpPos) > endPos)
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35 #include "jmixtmpl_c.h"
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36
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37 #else
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38
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39 #define JMIXER_ADDBUF_TYPE Sint32
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40 #define JMIXER_SAMPLE_TYPE Sint16
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41 #define JMIXER_INIT const Sint32 vol = (chn->chVolume * mixer->globalVol) / 256;
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42 #define JMIXER_FUNC tr = (((Sint32) sp[FP_GETH(tmpPos)]) * vol + tr) / (256 * 2); *(ap++) += tr;
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43
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44 #define JMIXER_NAME jvmMix_Mono_C_FW
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45 #define JMIXER_NEXT FP_ADD(tmpPos, tmpDelta);
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46 #define JMIXER_ENDCOND (FP_GETH(tmpPos) < endPos)
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47 #include "jmixtmpl_c.h"
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49
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49 #define JMIXER_NAME jvmMix_Mono_C_BW
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50 #define JMIXER_NEXT FP_SUB(tmpPos, tmpDelta);
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51 #define JMIXER_ENDCOND (FP_GETH(tmpPos) > endPos)
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52 #include "jmixtmpl_c.h"
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54 #endif
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55
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56 #undef JMIXER_SAMPLE_TYPE
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57 #undef JMIXER_INIT
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58 #undef JMIXER_FUNC
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59
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60 /* Stereo / Linear Interpolation
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61 */
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62 #ifdef JSS_MIX_FP
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63 #define JMIXER_SAMPLE_TYPE float
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64 #define JMIXER_INIT const double vol_l = (chn->chVolume * mixer->globalVol) / 256.0f, \
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65 vol_r = (chn->chVolume * mixer->globalVol) / 256.0f;
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66
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67 #define JMIXER_FUNC tl = ((double)sp[FP_GETH(tmpPos)] * vol_l + tl) / (2.0f * 256.0f); *(ap++) += tl; \
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68 tr = ((double)sp[FP_GETH(tmpPos)] * vol_r + tr) / (2.0f * 256.0f); *(ap++) += tr;
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69
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70 #define JMIXER_NAME jvmMix_Stereo_C_FW
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71 #define JMIXER_NEXT FP_ADD(tmpPos, tmpDelta);
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72 #define JMIXER_ENDCOND (FP_GETH(tmpPos) < endPos)
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73 #include "jmixtmpl_c.h"
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74
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75 #define JMIXER_NAME jvmMix_Stereo_C_BW
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76 #define JMIXER_NEXT FP_SUB(tmpPos, tmpDelta);
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77 #define JMIXER_ENDCOND (FP_GETH(tmpPos) > endPos)
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78 #include "jmixtmpl_c.h"
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79
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80 #else
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81
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82 #define JMIXER_SAMPLE_TYPE Sint16
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83 #define JMIXER_INIT const Sint32 vol_l = (chn->chVolume * mixer->globalVol) / 256, \
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84 vol_r = (chn->chVolume * mixer->globalVol) / 256;
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85
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86 #define JMIXER_FUNC tl = (((Sint32) sp[FP_GETH(tmpPos)]) * vol_l + tl) / (256 * 2); *(ap++) += tl; \
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87 tr = (((Sint32) sp[FP_GETH(tmpPos)]) * vol_r + tr) / (256 * 2); *(ap++) += tr;
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88
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89 #define JMIXER_NAME jvmMix_Stereo_C_FW
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90 #define JMIXER_NEXT FP_ADD(tmpPos, tmpDelta);
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91 #define JMIXER_ENDCOND (FP_GETH(tmpPos) < endPos)
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92 #include "jmixtmpl_c.h"
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93
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94 #define JMIXER_NAME jvmMix_Stereo_C_BW
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95 #define JMIXER_NEXT FP_SUB(tmpPos, tmpDelta);
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96 #define JMIXER_ENDCOND (FP_GETH(tmpPos) > endPos)
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97 #include "jmixtmpl_c.h"
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98
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99 #endif
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100
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101 #undef JMIXER_SAMPLE_TYPE
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102 #undef JMIXER_INIT
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103 #undef JMIXER_FUNC
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104
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105
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106 /* Post processing functions
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107 */
49
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108 #ifdef JSS_MIX_FP
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109
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110 #define JMIXER_CLAMP \
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111 if (t < -1.0f) t = -1.0f; else \
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112 if (t > 1.0f) t = 1.0f;
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113
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114 #define JMIXER_NAME jvmPostProcess_U8_C
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115 #define JMIXER_TYPE Uint8
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116 #define JMIXER_FUNCTION *(sp++) = (t + 1.0f) * 127.0f;
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117 #include "jmix_post_c.h"
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118
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119
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120 #define JMIXER_NAME jvmPostProcess_S8_C
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121 #define JMIXER_TYPE Sint8
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122 #define JMIXER_FUNCTION *(sp++) = t * 127.0f;
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123 #include "jmix_post_c.h"
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124
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125
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126 #define JMIXER_NAME jvmPostProcess_U16_C
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127 #define JMIXER_TYPE Uint16
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128 #define JMIXER_FUNCTION *(sp++) = (t + 1.0f) * 32767.0f;
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129 #include "jmix_post_c.h"
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130
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131
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132 #define JMIXER_NAME jvmPostProcess_S16_C
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133 #define JMIXER_TYPE Sint16
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134 #define JMIXER_FUNCTION *(sp++) = t * 32767.0f;
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135 #include "jmix_post_c.h"
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136
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137
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138 #else
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139
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140 #define JMIXER_CLAMP \
0
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141 if (t < JVM_LIMIT_16_NEG) t = JVM_LIMIT_16_NEG; else \
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142 if (t > JVM_LIMIT_16_POS) t = JVM_LIMIT_16_POS;
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143
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144 #define JMIXER_NAME jvmPostProcess_U8_C
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145 #define JMIXER_TYPE Uint8
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146 #define JMIXER_FUNCTION *(sp++) = (t + JVM_ADD_16) >> 8;
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147 #include "jmix_post_c.h"
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148
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149
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150 #define JMIXER_NAME jvmPostProcess_S8_C
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151 #define JMIXER_TYPE Sint8
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152 #define JMIXER_FUNCTION *(sp++) = t >> 8;
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153 #include "jmix_post_c.h"
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154
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155
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156 #define JMIXER_NAME jvmPostProcess_U16_C
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157 #define JMIXER_TYPE Uint16
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158 #define JMIXER_FUNCTION *(sp++) = t + JVM_ADD_16;
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159 #include "jmix_post_c.h"
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160
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161
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162 #define JMIXER_NAME jvmPostProcess_S16_C
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163 #define JMIXER_TYPE Sint16
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164 #define JMIXER_FUNCTION *(sp++) = t;
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165 #include "jmix_post_c.h"
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166
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167 #endif