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annotate dmengine.c @ 763:ad512e54c689

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Fix 10L in engine base code.
author Matti Hamalainen <ccr@tnsp.org>
date Thu, 09 May 2013 06:36:54 +0300
parents bb14d7907eb2
children 954b1b392c8b
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1 /*
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2 * dmlib
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3 * -- Demo engine / editor common code and definitions
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4 * Programmed and designed by Matti 'ccr' Hamalainen
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5 * (C) Copyright 2012-2013 Tecnic Software productions (TNSP)
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6 */
342
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7 #include "dmengine.h"
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8 #include "dmimage.h"
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9
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10
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11 #ifdef DM_USE_TREMOR
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12 #include <tremor/ivorbiscodec.h>
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13 #include <tremor/ivorbisfile.h>
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14 #endif
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15
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16
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17 DMEngineData engine;
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18 DMEffect *engineEffects = NULL;
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19 int nengineEffects = 0, nengineEffectsAlloc = 0;
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20
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21
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22 int engineRegisterEffect(const DMEffect *ef)
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23 {
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24 if (ef == NULL)
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25 return DMERR_NULLPTR;
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26
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27 // Allocate more space for effects
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28 if (nengineEffects + 1 >= nengineEffectsAlloc)
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29 {
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30 nengineEffectsAlloc += 16;
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31 engineEffects = dmRealloc(engineEffects, sizeof(DMEffect) * nengineEffectsAlloc);
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32 if (engineEffects == NULL)
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33 {
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34 dmError("Could not expand effects structure.\n");
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35 return DMERR_INIT_FAIL;
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36 }
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37 }
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38
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39 // Copy effects structure
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40 memcpy(engineEffects + nengineEffects, ef, sizeof(DMEffect));
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41 nengineEffects++;
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42
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43 return DMERR_OK;
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44 }
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45
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46
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47 int engineInitializeEffects(DMEngineData *engine)
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48 {
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49 int i, res;
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50
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51 dmFree(engine->effectData);
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52 engine->effectData = dmCalloc(nengineEffectsAlloc, sizeof(void *));
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53 if (engine->effectData == NULL)
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54 {
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55 dmError("Could not expand effects data structure.\n");
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56 return DMERR_INIT_FAIL;
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57 }
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58
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59 for (i = 0; i < nengineEffects; i++)
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60 {
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61 if (engineEffects[i].init != NULL &&
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62 (res = engineEffects[i].init(engine, &(engine->effectData[i]))) != DMERR_OK)
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63 return res;
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64 }
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65
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66 return DMERR_OK;
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67 }
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68
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69
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70 void engineShutdownEffects(DMEngineData *engine)
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71 {
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72 if (engine != NULL && engine->effectData != NULL)
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73 {
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74 int i;
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75 for (i = 0; i < nengineEffects; i++)
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76 {
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77 if (engineEffects[i].shutdown != NULL)
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78 engineEffects[i].shutdown(engine, engine->effectData[i]);
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79 }
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80 dmFree(engine->effectData);
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81 engine->effectData = NULL;
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82 }
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83 }
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84
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85
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86 DMEffect *engineFindEffect(const char *name, const int nparams)
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87 {
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88 int i;
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89 for (i = 0; i < nengineEffects; i++)
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90 {
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91 if (strcmp(engineEffects[i].name, name) == 0 &&
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92 engineEffects[i].nparams == nparams)
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93 return &engineEffects[i];
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94 }
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95 return NULL;
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96 }
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97
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98
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99 DMEffect *engineFindEffectByName(const char *name)
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100 {
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101 int i;
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102 for (i = 0; i < nengineEffects; i++)
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103 {
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104 if (strcmp(engineEffects[i].name, name) == 0)
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105 return &engineEffects[i];
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106 }
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107 return NULL;
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108 }
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109
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110
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111 static int engineResImageLoad(DMResource *res)
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112 {
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113 SDL_Surface *img = dmLoadImage(res);
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114 if (res != NULL)
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115 {
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116 res->resData = img;
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117 return DMERR_OK;
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118 }
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119 else
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120 return dmferror(res);
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121 }
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122
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123
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124 static void engineResImageFree(DMResource *res)
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125 {
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126 SDL_FreeSurface((SDL_Surface *)res->resData);
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127 }
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128
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129 static BOOL engineResImageProbe(DMResource *res, const char *fext)
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130 {
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131 (void) res;
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132 return fext != NULL && (strcasecmp(fext, ".jpg") == 0 || strcasecmp(fext, ".png") == 0);
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133 }
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134
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135
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136 #ifdef JSS_SUP_XM
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137 static int engineResModuleLoad(DMResource *res)
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138 {
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139 return jssLoadXM(res, (JSSModule **) &(res->resData));
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140 }
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141
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142 static void engineResModuleFree(DMResource *res)
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143 {
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144 jssFreeModule((JSSModule *) res->resData);
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145 }
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146
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147 static BOOL engineResModuleProbe(DMResource *res, const char *fext)
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148 {
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149 (void) res;
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150 return fext != NULL && (strcasecmp(fext, ".xm") == 0 || strcasecmp(fext, ".jmod") == 0);
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151 }
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152 #endif
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153
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154
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155 #ifdef DM_USE_TREMOR
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156 static size_t vorbisFileRead(void *ptr, size_t size, size_t nmemb, void *datasource)
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157 {
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158 return dmfread(ptr, size, nmemb, (DMResource *) datasource);
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159 }
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160
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161 static int vorbisFileSeek(void *datasource, ogg_int64_t offset, int whence)
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162 {
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163 return dmfseek((DMResource *) datasource, offset, whence);
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164 }
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165
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166 static int vorbisFileClose(void *datasource)
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167 {
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168 (void) datasource;
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169 return 0;
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170 }
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171
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172 static long vorbisFileTell(void *datasource)
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173 {
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174 return dmftell((DMResource *) datasource);
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175 }
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176
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177
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178 static ov_callbacks vorbisFileCBS =
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179 {
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180 vorbisFileRead,
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181 vorbisFileSeek,
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182 vorbisFileClose,
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183 vorbisFileTell
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184 };
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185
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186 static int engineResVorbisLoad(DMResource *res)
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187 {
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188 OggVorbis_File vf;
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189
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190 dmMsg(1, "vorbisfile '%s', %d bytes resource loading\n",
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191 res->filename, res->rawSize);
342
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192
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193 if (ov_open_callbacks(res, &vf, NULL, 0, vorbisFileCBS) < 0)
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194 return DMERR_FOPEN;
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195
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196 res->resSize = ov_pcm_total(&vf, -1) * 2 * 2;
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197 if ((res->resData = dmMalloc(res->resSize + 16)) == NULL)
342
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198 {
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199 ov_clear(&vf);
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200 return DMERR_MALLOC;
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201 }
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202
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203 dmMsg(1, "rdataSize=%d bytes?\n", res->resSize);
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204
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205 BOOL eof = FALSE;
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206 int left = res->resSize;
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207 char *ptr = res->resData;
342
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208 int current_section;
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209 while (!eof && left > 0)
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210 {
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211 int ret = ov_read(&vf, ptr, left > 4096 ? 4096 : left, &current_section);
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212 if (ret == 0)
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213 eof = TRUE;
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214 else
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215 if (ret < 0)
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216 {
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217 ov_clear(&vf);
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218 return DMERR_INVALID_DATA;
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219 }
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220 else
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221 {
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222 left -= ret;
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223 ptr += ret;
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224 }
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225 }
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226
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227 ov_clear(&vf);
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228 return DMERR_OK;
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229 }
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230
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231 static void engineResVorbisFree(DMResource *res)
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232 {
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233 dmFree(res->resData);
342
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234 }
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235
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236 static BOOL engineResVorbisProbe(DMResource *res, const char *fext)
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237 {
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238 (void) res;
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239 return fext != NULL && (strcasecmp(fext, ".ogg") == 0);
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240 }
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241 #endif
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242
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243
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244 static DMResourceDataOps engineResOps[] =
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245 {
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246 {
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247 engineResImageProbe,
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248 engineResImageLoad,
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249 engineResImageFree
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diff changeset
250 },
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251
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252 #ifdef JSS_SUP_XM
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253 {
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254 engineResModuleProbe,
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255 engineResModuleLoad,
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256 engineResModuleFree
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diff changeset
257 },
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diff changeset
258 #endif
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259
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260 #ifdef DM_USE_TREMOR
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261 {
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262 engineResVorbisProbe,
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263 engineResVorbisLoad,
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264 engineResVorbisFree
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265 },
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266 #endif
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267 };
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268
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269 static const int nengineResOps = sizeof(engineResOps) / sizeof(engineResOps[0]);
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270
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271
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272 int engineClassifier(DMResource *res)
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273 {
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274 int i;
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275 char *fext;
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276
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diff changeset
277 if (res == NULL)
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278 return DMERR_NULLPTR;
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279
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280 fext = strrchr(res->filename, '.');
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281 for (i = 0; i < nengineResOps; i++)
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282 {
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283 DMResourceDataOps *rops = &engineResOps[i];
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284 if (rops->probe != NULL && rops->probe(res, fext))
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285 {
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diff changeset
286 res->rops = rops;
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287 return DMERR_OK;
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diff changeset
288 }
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289 }
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290
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291 return DMERR_OK;
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parents:
diff changeset
292 }
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293
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294
366
38e10b5f4e09 Work towards base engine re-entrancy.
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parents: 359
diff changeset
295 void *engineGetResource(DMEngineData *eng, const char *name)
342
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296 {
366
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diff changeset
297 DMResource *res;
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parents: 359
diff changeset
298 if (eng != NULL &&
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299 (res = dmResourceFind(eng->resources, name)) != NULL &&
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300 res->resData != NULL)
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301 return res->resData;
342
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302 else
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303 {
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304 dmError("Could not find resource '%s'.\n", name);
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305 return NULL;
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306 }
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307 }
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308
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309
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310 #ifdef DM_USE_JSS
366
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311 void engineGetJSSInfo(DMEngineData *eng, BOOL *playing, int *order, JSSPattern **pat, int *npattern, int *row)
342
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312 {
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313 JSS_LOCK(eng->jssPlr);
342
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314
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315 *playing = eng->jssPlr->isPlaying;
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316 *row = eng->jssPlr->row;
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317 *pat = eng->jssPlr->pattern;
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318 *npattern = eng->jssPlr->npattern;
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319 *order = eng->jssPlr->order;
342
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320
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321 JSS_UNLOCK(eng->jssPlr);
342
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322 }
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323
366
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324 void engineGetJSSChannelInfo(DMEngineData *eng, const int channel, int *ninst, int *nextInst, int *freq, int *note)
342
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325 {
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326 JSS_LOCK(eng->jssPlr);
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327 JSSPlayerChannel *chn = &(eng->jssPlr->channels[channel]);
342
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328 *ninst = chn->ninstrument;
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329 *nextInst = chn->nextInstrument;
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330 *freq = chn->freq;
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331 *note = chn->note;
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332 JSS_UNLOCK(eng->jssPlr);
342
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333 }
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334 #endif
367
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335
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336
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337 int engineGetTick(DMEngineData *engine)
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338 {
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339 return engine->frameTime - engine->startTime;
367
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340 }
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341
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342
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343 float engineGetTimeDT(DMEngineData *engine)
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344 {
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345 return (float) engineGetTick(engine) / 1000.0f;
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346 }
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347
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348
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349 int engineGetTimeDTi(DMEngineData *engine)
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350 {
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351 return (float) engineGetTick(engine) / 1000;
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352 }
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353
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354
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355 int engineGetTime(DMEngineData *engine, int t)
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356 {
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357 return engineGetTick(engine) - (1000 * t);
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358 }
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359
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360
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361 int engineGetDT(DMEngineData *engine, int t)
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362 {
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363 return engineGetTime(engine, t) / 1000;
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364 }