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annotate dmengine.c @ 342:c6ec970dc3cf

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Separate some demo engine parts to two different modules.
author Matti Hamalainen <ccr@tnsp.org>
date Mon, 15 Oct 2012 21:25:51 +0300
parents
children cac13f180169
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rev   line source
342
c6ec970dc3cf Separate some demo engine parts to two different modules.
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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;
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12 DMFrameData frame;
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13
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14
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15 int engineGetTick()
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16 {
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17 return (frame.startTime - engine.startTime) + engine.adjustTime;
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18 }
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19
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20
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21 float engineGetTimeDT()
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22 {
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23 return (float) engineGetTick() / 1000.0f;
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24 }
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25
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26
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27 int engineGetTimeDTi()
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28 {
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29 return (float) engineGetTick() / 1000;
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30 }
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31
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32
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33 int engineGetTime(int t)
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34 {
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35 return engineGetTick() - (1000 * t);
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36 }
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37
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38
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39 int engineGetDT(int t)
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40 {
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41 return engineGetTime(t) / 1000;
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42 }
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43
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44
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45 static int engineResImageLoad(DMResource *res)
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46 {
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47 SDL_Surface *img = dmLoadImage(res);
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48 if (res != NULL)
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49 {
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50 res->rdata = img;
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51 return DMERR_OK;
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52 }
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53 else
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54 return dmferror(res);
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55 }
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56
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57
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58 static void engineResImageFree(DMResource *res)
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59 {
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60 SDL_FreeSurface((SDL_Surface *)res->rdata);
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61 }
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62
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63 static BOOL engineResImageProbe(DMResource *res, const char *fext)
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64 {
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65 (void) res;
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66 return fext != NULL && (strcasecmp(fext, ".jpg") == 0 || strcasecmp(fext, ".png") == 0);
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67 }
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68
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69
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70 #ifdef JSS_SUP_XM
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71 static int engineResModuleLoad(DMResource *res)
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72 {
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73 return jssLoadXM(res, (JSSModule **) &(res->rdata));
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74 }
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75
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76 static void engineResModuleFree(DMResource *res)
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77 {
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78 jssFreeModule((JSSModule *) res->rdata);
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79 }
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80
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81 static BOOL engineResModuleProbe(DMResource *res, const char *fext)
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82 {
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83 (void) res;
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84 return fext != NULL && (strcasecmp(fext, ".xm") == 0 || strcasecmp(fext, ".jmod") == 0);
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85 }
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86 #endif
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87
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88
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89 #ifdef DM_USE_TREMOR
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90 static size_t vorbisFileRead(void *ptr, size_t size, size_t nmemb, void *datasource)
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91 {
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92 return dmfread(ptr, size, nmemb, (DMResource *) datasource);
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93 }
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94
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95 static int vorbisFileSeek(void *datasource, ogg_int64_t offset, int whence)
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96 {
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97 return dmfseek((DMResource *) datasource, offset, whence);
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98 }
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99
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100 static int vorbisFileClose(void *datasource)
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101 {
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102 (void) datasource;
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103 return 0;
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104 }
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105
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106 static long vorbisFileTell(void *datasource)
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107 {
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108 return dmftell((DMResource *) datasource);
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109 }
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110
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111
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112 static ov_callbacks vorbisFileCBS =
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113 {
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114 vorbisFileRead,
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115 vorbisFileSeek,
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116 vorbisFileClose,
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117 vorbisFileTell
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118 };
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119
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120 static int engineResVorbisLoad(DMResource *res)
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121 {
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122 OggVorbis_File vf;
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123
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124 dmMsg(1, "vorbisfile '%s', %d bytes resource loading\n",
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125 res->filename, res->dataSize);
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126
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127 if (ov_open_callbacks(res, &vf, NULL, 0, vorbisFileCBS) < 0)
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128 return DMERR_FOPEN;
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129
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130 res->rdataSize = ov_pcm_total(&vf, -1) * 2 * 2;
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131 if ((res->rdata = dmMalloc(res->rdataSize + 16)) == NULL)
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132 {
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133 ov_clear(&vf);
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134 return DMERR_MALLOC;
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135 }
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136
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137 dmMsg(1, "rdataSize=%d bytes?\n", res->rdataSize);
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138
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139 BOOL eof = FALSE;
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140 int left = res->rdataSize;
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141 char *ptr = res->rdata;
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142 int current_section;
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143 while (!eof && left > 0)
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144 {
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145 int ret = ov_read(&vf, ptr, left > 4096 ? 4096 : left, &current_section);
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146 if (ret == 0)
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147 eof = TRUE;
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148 else
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149 if (ret < 0)
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150 {
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151 ov_clear(&vf);
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152 return DMERR_INVALID_DATA;
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153 }
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154 else
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155 {
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156 left -= ret;
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157 ptr += ret;
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158 }
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159 }
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160
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161 ov_clear(&vf);
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162 return DMERR_OK;
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163 }
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164
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165 static void engineResVorbisFree(DMResource *res)
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166 {
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167 dmFree(res->rdata);
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168 }
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169
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170 static BOOL engineResVorbisProbe(DMResource *res, const char *fext)
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171 {
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172 (void) res;
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173 return fext != NULL && (strcasecmp(fext, ".ogg") == 0);
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174 }
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175 #endif
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176
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177
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178 static DMResourceDataOps engineResOps[] =
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179 {
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180 {
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181 engineResImageProbe,
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182 engineResImageLoad,
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183 engineResImageFree
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184 },
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185
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186 #ifdef JSS_SUP_XM
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187 {
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188 engineResModuleProbe,
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189 engineResModuleLoad,
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190 engineResModuleFree
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191 },
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192 #endif
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193
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194 #ifdef DM_USE_TREMOR
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195 {
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196 engineResVorbisProbe,
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197 engineResVorbisLoad,
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198 engineResVorbisFree
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199 },
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200 #endif
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201 };
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202
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203 static const int nengineResOps = sizeof(engineResOps) / sizeof(engineResOps[0]);
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204
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205
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206 int engineClassifier(DMResource *res)
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207 {
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208 int i;
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209 char *fext;
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210
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211 if (res == NULL)
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212 return DMERR_NULLPTR;
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213
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214 fext = strrchr(res->filename, '.');
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215 for (i = 0; i < nengineResOps; i++)
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216 {
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217 DMResourceDataOps *rops = &engineResOps[i];
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218 if (rops->probe != NULL && rops->probe(res, fext))
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219 {
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220 res->rops = rops;
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221 return DMERR_OK;
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222 }
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223 }
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224
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225 return DMERR_OK;
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226 }
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227
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228
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229 void *engineGetResource(const char *name)
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230 {
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231 DMResource *res = dmres_find(name);
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232 if (res != NULL && res->rdata != NULL)
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233 return res->rdata;
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234 else
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235 {
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236 dmError("Could not find resource '%s'.\n", name);
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237 return NULL;
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238 }
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239 }
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240
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241
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242 #ifdef DM_USE_JSS
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243 void engineGetJSSInfo(BOOL *playing, int *order, JSSPattern **pat, int *npattern, int *row)
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244 {
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245 JSS_LOCK(engine.plr);
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246
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247 *playing = engine.plr->isPlaying;
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248 *row = engine.plr->row;
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249 *pat = engine.plr->pattern;
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250 *npattern = engine.plr->npattern;
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251 *order = engine.plr->order;
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252
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253 JSS_UNLOCK(engine.plr);
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diff changeset
254 }
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255
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256 void engineGetJSSChannelInfo(const int channel, int *ninst, int *nextInst, int *freq, int *note)
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257 {
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258 JSS_LOCK(engine.plr);
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259 JSSPlayerChannel *chn = &(engine.plr->channels[channel]);
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260 *ninst = chn->ninstrument;
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261 *nextInst = chn->nextInstrument;
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262 *freq = chn->freq;
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263 *note = chn->note;
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264 JSS_UNLOCK(engine.plr);
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265 }
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266 #endif