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annotate jmix_c_in.c @ 49:033c660c25f5

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Restructure module playing, removing 8bit sample mixing (output can still be 8bit, but samples are internally upconverted to 16bit after module loading.) Also prepare for floating point mixing support.
author Matti Hamalainen <ccr@tnsp.org>
date Mon, 01 Oct 2012 02:51:41 +0300
parents f939d3896937
children 36e2f910219c
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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 /* Mono / Linear Interpolation
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11 */
49
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12 #ifdef JSS_MIX_FP
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13 #define JMIXER_ADDBUF_TYPE float
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14 #define JMIXER_SAMPLE_TYPE float
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15 #define JMIXER_INIT const float vol = (float) (chn->chVolume * mixer->globalVol) / (256.0f * 64.0f);
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16 #define JMIXER_FUNC tr = (sp[FP_GETH(tmpPos)] * vol + tr) / 2.0f; *(ap++) += tr;
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17
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18
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19 #define JMIXER_NAME jvmMix_Mono_C_FW
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20 #define JMIXER_NEXT FP_ADD(tmpPos, tmpDelta);
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21 #define JMIXER_ENDCOND (FP_GETH(tmpPos) < endPos)
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22 #include "jmixtmpl_c.h"
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23
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24
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25 #define JMIXER_NAME jvmMix_Mono_C_BW
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26 #define JMIXER_NEXT FP_SUB(tmpPos, tmpDelta);
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27 #define JMIXER_ENDCOND (FP_GETH(tmpPos) > endPos)
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28 #include "jmixtmpl_c.h"
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29
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30 #undef JMIXER_ADDBUF_TYPE
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31 #undef JMIXER_SAMPLE_TYPE
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32 #undef JMIXER_INIT
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33 #undef JMIXER_FUNC
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34
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35 #else
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36
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37 #define JMIXER_ADDBUF_TYPE Sint32
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38 #define JMIXER_SAMPLE_TYPE Sint16
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39 #define JMIXER_INIT const Sint32 vol = (chn->chVolume * mixer->globalVol) / 256;
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40 #define JMIXER_FUNC tr = (((Sint32) sp[FP_GETH(tmpPos)]) * vol + tr) / (256 * 2); *(ap++) += tr;
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41
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42 #define JMIXER_NAME jvmMix_Mono_C_FW
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43 #define JMIXER_NEXT FP_ADD(tmpPos, tmpDelta);
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44 #define JMIXER_ENDCOND (FP_GETH(tmpPos) < endPos)
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45 #include "jmixtmpl_c.h"
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49
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47 #define JMIXER_NAME jvmMix_Mono_C_BW
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48 #define JMIXER_NEXT FP_SUB(tmpPos, tmpDelta);
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49 #define JMIXER_ENDCOND (FP_GETH(tmpPos) > endPos)
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50 #include "jmixtmpl_c.h"
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51
49
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52 #undef JMIXER_ADDBUF_TYPE
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53 #undef JMIXER_SAMPLE_TYPE
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54 #undef JMIXER_INIT
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55 #undef JMIXER_FUNC
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56
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57 #endif
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58
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59 /* Stereo / Linear Interpolation
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60 */
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61 #ifdef JSS_MIX_FP
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62 #define JMIXER_ADDBUF_TYPE float
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63 #define JMIXER_SAMPLE_TYPE float
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64 #define JMIXER_INIT const float vol_l = (chn->chVolume * mixer->globalVol) / (256.0f * 64.0f), \
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65 vol_r = (chn->chVolume * mixer->globalVol) / (256.0f * 64.0f);
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66
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67 #define JMIXER_FUNC tl = (sp[FP_GETH(tmpPos)] * vol_l + tl) / 2.0f; *(ap++) += tl; \
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68 tr = (sp[FP_GETH(tmpPos)] * vol_r + tr) / 2.0f; *(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 #undef JMIXER_ADDBUF_TYPE
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81 #undef JMIXER_SAMPLE_TYPE
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82 #undef JMIXER_INIT
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83 #undef JMIXER_FUNC
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84
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85 #else
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86
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87 #define JMIXER_ADDBUF_TYPE Sint32
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88 #define JMIXER_SAMPLE_TYPE Sint16
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89 #define JMIXER_INIT const Sint32 vol_l = (chn->chVolume * mixer->globalVol) / 256, \
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90 vol_r = (chn->chVolume * mixer->globalVol) / 256;
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91
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92 #define JMIXER_FUNC tl = (((Sint32) sp[FP_GETH(tmpPos)]) * vol_l + tl) / (256 * 2); *(ap++) += tl; \
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93 tr = (((Sint32) sp[FP_GETH(tmpPos)]) * vol_r + tr) / (256 * 2); *(ap++) += tr;
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94
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95 #define JMIXER_NAME jvmMix_Stereo_C_FW
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96 #define JMIXER_NEXT FP_ADD(tmpPos, tmpDelta);
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97 #define JMIXER_ENDCOND (FP_GETH(tmpPos) < endPos)
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98 #include "jmixtmpl_c.h"
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99
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100 #define JMIXER_NAME jvmMix_Stereo_C_BW
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101 #define JMIXER_NEXT FP_SUB(tmpPos, tmpDelta);
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102 #define JMIXER_ENDCOND (FP_GETH(tmpPos) > endPos)
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103 #include "jmixtmpl_c.h"
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104
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105 #undef JMIXER_ADDBUF_TYPE
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106 #undef JMIXER_SAMPLE_TYPE
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107 #undef JMIXER_INIT
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108 #undef JMIXER_FUNC
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109
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110 #endif
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111
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112 /* Post processing functions
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113 */
49
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114 #ifdef JSS_MIX_FP
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115
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116 #define JMIXER_ADDBUF_TYPE float
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117
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118 #define JMIXER_CLAMP \
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119 if (t < -1.0f) t = -1.0f; else \
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120 if (t > 1.0f) t = 1.0f; \
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121
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122 #define JMIXER_NAME jvmPostProcess_U8_C
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123 #define JMIXER_TYPE Uint8
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124 #define JMIXER_FUNCTION *(sp++) = (t + 1.0f) * 127.0f;
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125 #include "jmix_post_c.h"
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127
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128 #define JMIXER_NAME jvmPostProcess_S8_C
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129 #define JMIXER_TYPE Sint8
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130 #define JMIXER_FUNCTION *(sp++) = t * 127.0f;
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131 #include "jmix_post_c.h"
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132
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133
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134 #define JMIXER_NAME jvmPostProcess_U16_C
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135 #define JMIXER_TYPE Uint16
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136 #define JMIXER_FUNCTION *(sp++) = (t + 1.0f) * 32767.0f;
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137 #include "jmix_post_c.h"
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138
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139
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140 #define JMIXER_NAME jvmPostProcess_S16_C
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141 #define JMIXER_TYPE Sint16
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142 #define JMIXER_FUNCTION *(sp++) = t * 32767.0f;
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143 #include "jmix_post_c.h"
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144
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145
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146 #else
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147
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148 #define JMIXER_ADDBUF_TYPE Sint32
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149
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150 #define JMIXER_CLAMP \
0
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151 if (t < JVM_LIMIT_16_NEG) t = JVM_LIMIT_16_NEG; else \
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152 if (t > JVM_LIMIT_16_POS) t = JVM_LIMIT_16_POS; \
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153
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154 #define JMIXER_NAME jvmPostProcess_U8_C
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155 #define JMIXER_TYPE Uint8
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156 #define JMIXER_FUNCTION *(sp++) = (t + JVM_ADD_16) >> 8;
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157 #include "jmix_post_c.h"
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158
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159
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160 #define JMIXER_NAME jvmPostProcess_S8_C
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161 #define JMIXER_TYPE Sint8
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162 #define JMIXER_FUNCTION *(sp++) = t >> 8;
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163 #include "jmix_post_c.h"
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164
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165
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166 #define JMIXER_NAME jvmPostProcess_U16_C
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167 #define JMIXER_TYPE Uint16
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168 #define JMIXER_FUNCTION *(sp++) = t + JVM_ADD_16;
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169 #include "jmix_post_c.h"
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170
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171
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172 #define JMIXER_NAME jvmPostProcess_S16_C
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173 #define JMIXER_TYPE Sint16
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174 #define JMIXER_FUNCTION *(sp++) = t;
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175 #include "jmix_post_c.h"
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176
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177 #endif