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annotate dmengine.c @ 368:08ea68abb1f8

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Work towards re-entrancy.
author Matti Hamalainen <ccr@tnsp.org>
date Wed, 17 Oct 2012 00:01:46 +0300
parents 9875c65029af
children e1c984404b6b
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342
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1 #include "dmengine.h"
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2 #include "dmimage.h"
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3
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4
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5 #ifdef DM_USE_TREMOR
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6 #include <tremor/ivorbiscodec.h>
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7 #include <tremor/ivorbisfile.h>
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8 #endif
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9
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10
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11 DMEngineData engine;
368
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12 DMEffect *engineEffects = NULL;
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13 int nengineEffects = 0, nengineEffectsAlloc = 0;
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14
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15
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16 int engineRegisterEffect(const DMEffect *ef)
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17 {
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18 if (ef == NULL)
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19 return DMERR_NULLPTR;
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20
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21 // Allocate more space for effects
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22 if (nengineEffects + 1 >= nengineEffectsAlloc)
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23 {
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24 nengineEffectsAlloc += 16;
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25 engineEffects = dmRealloc(engineEffects, sizeof(DMEffect) * nengineEffectsAlloc);
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26 if (engineEffects == NULL)
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27 {
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28 dmError("Could not expand effects structure.\n");
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29 return DMERR_INIT_FAIL;
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30 }
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31 }
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32
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33 // Copy effects structure
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34 memcpy(engineEffects + nengineEffects, ef, sizeof(DMEffect));
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35 nengineEffects++;
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36
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37 return DMERR_OK;
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38 }
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39
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40
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41 int engineInitializeEffects(DMEngineData *engine)
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42 {
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43 int i, res;
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44
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45 dmFree(engine->effectData);
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46 engine->effectData = dmCalloc(nengineEffectsAlloc, sizeof(void *));
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47 if (engine->effectData == NULL)
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48 {
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49 dmError("Could not expand effects data structure.\n");
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50 return DMERR_INIT_FAIL;
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51 }
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52
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53 for (i = 0; i < nengineEffects; i++)
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54 {
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55 if (engineEffects[i].init != NULL &&
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56 (res = engineEffects[i].init(engine, &engine->effectData[i])) != DMERR_OK)
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57 return res;
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58 }
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59
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60 return DMERR_OK;
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61 }
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62
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63
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64 void engineShutdownEffects(DMEngineData *engine)
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65 {
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66 int i;
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67 for (i = 0; i < nengineEffects; i++)
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68 {
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69 if (engineEffects[i].shutdown != NULL)
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70 engineEffects[i].shutdown(engine, engine->effectData[i]);
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71 }
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72 dmFree(engine->effectData);
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73 engine->effectData = NULL;
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74 }
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75
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76
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77 DMEffect *engineFindEffect(const char *name, const int nparams)
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78 {
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79 int i;
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80 for (i = 0; i < nengineEffects; i++)
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81 {
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82 if (strcmp(engineEffects[i].name, name) == 0 &&
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83 engineEffects[i].nparams == nparams)
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84 return &engineEffects[i];
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85 }
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86 return NULL;
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87 }
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88
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89
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90 DMEffect *engineFindEffectByName(const char *name)
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91 {
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92 int i;
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93 for (i = 0; i < nengineEffects; i++)
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94 {
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95 if (strcmp(engineEffects[i].name, name) == 0)
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96 return &engineEffects[i];
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97 }
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98 return NULL;
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99 }
342
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100
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101
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102 static int engineResImageLoad(DMResource *res)
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103 {
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104 SDL_Surface *img = dmLoadImage(res);
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105 if (res != NULL)
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106 {
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107 res->rdata = img;
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108 return DMERR_OK;
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109 }
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110 else
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111 return dmferror(res);
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112 }
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113
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114
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115 static void engineResImageFree(DMResource *res)
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116 {
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117 SDL_FreeSurface((SDL_Surface *)res->rdata);
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118 }
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119
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120 static BOOL engineResImageProbe(DMResource *res, const char *fext)
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121 {
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122 (void) res;
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123 return fext != NULL && (strcasecmp(fext, ".jpg") == 0 || strcasecmp(fext, ".png") == 0);
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124 }
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125
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126
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127 #ifdef JSS_SUP_XM
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128 static int engineResModuleLoad(DMResource *res)
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129 {
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130 return jssLoadXM(res, (JSSModule **) &(res->rdata));
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131 }
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132
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133 static void engineResModuleFree(DMResource *res)
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134 {
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135 jssFreeModule((JSSModule *) res->rdata);
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136 }
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137
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138 static BOOL engineResModuleProbe(DMResource *res, const char *fext)
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139 {
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140 (void) res;
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141 return fext != NULL && (strcasecmp(fext, ".xm") == 0 || strcasecmp(fext, ".jmod") == 0);
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142 }
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143 #endif
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144
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145
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146 #ifdef DM_USE_TREMOR
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147 static size_t vorbisFileRead(void *ptr, size_t size, size_t nmemb, void *datasource)
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148 {
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149 return dmfread(ptr, size, nmemb, (DMResource *) datasource);
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150 }
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151
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152 static int vorbisFileSeek(void *datasource, ogg_int64_t offset, int whence)
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153 {
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154 return dmfseek((DMResource *) datasource, offset, whence);
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155 }
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156
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157 static int vorbisFileClose(void *datasource)
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158 {
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159 (void) datasource;
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160 return 0;
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161 }
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162
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163 static long vorbisFileTell(void *datasource)
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164 {
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165 return dmftell((DMResource *) datasource);
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166 }
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167
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168
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169 static ov_callbacks vorbisFileCBS =
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170 {
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171 vorbisFileRead,
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172 vorbisFileSeek,
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173 vorbisFileClose,
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174 vorbisFileTell
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175 };
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176
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177 static int engineResVorbisLoad(DMResource *res)
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178 {
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179 OggVorbis_File vf;
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180
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181 dmMsg(1, "vorbisfile '%s', %d bytes resource loading\n",
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182 res->filename, res->dataSize);
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183
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184 if (ov_open_callbacks(res, &vf, NULL, 0, vorbisFileCBS) < 0)
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185 return DMERR_FOPEN;
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186
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187 res->rdataSize = ov_pcm_total(&vf, -1) * 2 * 2;
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188 if ((res->rdata = dmMalloc(res->rdataSize + 16)) == NULL)
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189 {
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190 ov_clear(&vf);
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191 return DMERR_MALLOC;
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192 }
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193
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194 dmMsg(1, "rdataSize=%d bytes?\n", res->rdataSize);
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195
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196 BOOL eof = FALSE;
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197 int left = res->rdataSize;
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198 char *ptr = res->rdata;
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199 int current_section;
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200 while (!eof && left > 0)
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201 {
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202 int ret = ov_read(&vf, ptr, left > 4096 ? 4096 : left, &current_section);
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203 if (ret == 0)
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204 eof = TRUE;
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205 else
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206 if (ret < 0)
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207 {
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208 ov_clear(&vf);
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209 return DMERR_INVALID_DATA;
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210 }
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parents:
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211 else
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212 {
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213 left -= ret;
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214 ptr += ret;
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215 }
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parents:
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216 }
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217
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218 ov_clear(&vf);
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219 return DMERR_OK;
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220 }
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221
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222 static void engineResVorbisFree(DMResource *res)
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223 {
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224 dmFree(res->rdata);
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225 }
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226
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227 static BOOL engineResVorbisProbe(DMResource *res, const char *fext)
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228 {
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229 (void) res;
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230 return fext != NULL && (strcasecmp(fext, ".ogg") == 0);
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231 }
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232 #endif
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233
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234
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235 static DMResourceDataOps engineResOps[] =
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236 {
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parents:
diff changeset
237 {
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238 engineResImageProbe,
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239 engineResImageLoad,
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240 engineResImageFree
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parents:
diff changeset
241 },
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diff changeset
242
c6ec970dc3cf Separate some demo engine parts to two different modules.
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diff changeset
243 #ifdef JSS_SUP_XM
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244 {
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245 engineResModuleProbe,
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246 engineResModuleLoad,
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247 engineResModuleFree
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parents:
diff changeset
248 },
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diff changeset
249 #endif
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250
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diff changeset
251 #ifdef DM_USE_TREMOR
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252 {
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253 engineResVorbisProbe,
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diff changeset
254 engineResVorbisLoad,
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diff changeset
255 engineResVorbisFree
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parents:
diff changeset
256 },
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parents:
diff changeset
257 #endif
c6ec970dc3cf Separate some demo engine parts to two different modules.
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parents:
diff changeset
258 };
c6ec970dc3cf Separate some demo engine parts to two different modules.
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parents:
diff changeset
259
c6ec970dc3cf Separate some demo engine parts to two different modules.
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diff changeset
260 static const int nengineResOps = sizeof(engineResOps) / sizeof(engineResOps[0]);
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parents:
diff changeset
261
c6ec970dc3cf Separate some demo engine parts to two different modules.
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parents:
diff changeset
262
c6ec970dc3cf Separate some demo engine parts to two different modules.
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diff changeset
263 int engineClassifier(DMResource *res)
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264 {
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diff changeset
265 int i;
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266 char *fext;
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diff changeset
267
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diff changeset
268 if (res == NULL)
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diff changeset
269 return DMERR_NULLPTR;
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diff changeset
270
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271 fext = strrchr(res->filename, '.');
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272 for (i = 0; i < nengineResOps; i++)
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diff changeset
273 {
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diff changeset
274 DMResourceDataOps *rops = &engineResOps[i];
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diff changeset
275 if (rops->probe != NULL && rops->probe(res, fext))
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diff changeset
276 {
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diff changeset
277 res->rops = rops;
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diff changeset
278 return DMERR_OK;
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parents:
diff changeset
279 }
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parents:
diff changeset
280 }
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parents:
diff changeset
281
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diff changeset
282 return DMERR_OK;
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parents:
diff changeset
283 }
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diff changeset
284
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285
366
38e10b5f4e09 Work towards base engine re-entrancy.
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parents: 359
diff changeset
286 void *engineGetResource(DMEngineData *eng, const char *name)
342
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diff changeset
287 {
366
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parents: 359
diff changeset
288 DMResource *res;
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parents: 359
diff changeset
289 if (eng != NULL &&
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diff changeset
290 (res = dmres_find(eng->resources, name)) != NULL &&
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parents: 359
diff changeset
291 res->rdata != NULL)
342
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diff changeset
292 return res->rdata;
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parents:
diff changeset
293 else
c6ec970dc3cf Separate some demo engine parts to two different modules.
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parents:
diff changeset
294 {
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diff changeset
295 dmError("Could not find resource '%s'.\n", name);
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diff changeset
296 return NULL;
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parents:
diff changeset
297 }
c6ec970dc3cf Separate some demo engine parts to two different modules.
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parents:
diff changeset
298 }
c6ec970dc3cf Separate some demo engine parts to two different modules.
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parents:
diff changeset
299
c6ec970dc3cf Separate some demo engine parts to two different modules.
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diff changeset
300
c6ec970dc3cf Separate some demo engine parts to two different modules.
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diff changeset
301 #ifdef DM_USE_JSS
366
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parents: 359
diff changeset
302 void engineGetJSSInfo(DMEngineData *eng, BOOL *playing, int *order, JSSPattern **pat, int *npattern, int *row)
342
c6ec970dc3cf Separate some demo engine parts to two different modules.
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diff changeset
303 {
366
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304 JSS_LOCK(eng->plr);
342
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305
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306 *playing = eng->plr->isPlaying;
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307 *row = eng->plr->row;
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308 *pat = eng->plr->pattern;
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309 *npattern = eng->plr->npattern;
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310 *order = eng->plr->order;
342
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311
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312 JSS_UNLOCK(eng->plr);
342
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313 }
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314
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315 void engineGetJSSChannelInfo(DMEngineData *eng, const int channel, int *ninst, int *nextInst, int *freq, int *note)
342
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316 {
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317 JSS_LOCK(eng->plr);
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318 JSSPlayerChannel *chn = &(eng->plr->channels[channel]);
342
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319 *ninst = chn->ninstrument;
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320 *nextInst = chn->nextInstrument;
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321 *freq = chn->freq;
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322 *note = chn->note;
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323 JSS_UNLOCK(eng->plr);
342
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324 }
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325 #endif
367
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326
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327
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328 int engineGetTick(DMEngineData *engine)
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329 {
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330 return (engine->frameTime - engine->startTime) + engine->adjustTime;
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331 }
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332
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333
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334 float engineGetTimeDT(DMEngineData *engine)
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335 {
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336 return (float) engineGetTick(engine) / 1000.0f;
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337 }
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338
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339
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340 int engineGetTimeDTi(DMEngineData *engine)
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341 {
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342 return (float) engineGetTick(engine) / 1000;
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343 }
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344
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345
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346 int engineGetTime(DMEngineData *engine, int t)
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347 {
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348 return engineGetTick(engine) - (1000 * t);
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349 }
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350
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351
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352 int engineGetDT(DMEngineData *engine, int t)
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353 {
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354 return engineGetTime(engine, t) / 1000;
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355 }
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356
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357