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annotate dmengine.c @ 366:38e10b5f4e09

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Work towards base engine re-entrancy.
author Matti Hamalainen <ccr@tnsp.org>
date Tue, 16 Oct 2012 23:16:42 +0300
parents 59045853853d
children 9875c65029af
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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
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13
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14 static int engineResImageLoad(DMResource *res)
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15 {
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16 SDL_Surface *img = dmLoadImage(res);
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17 if (res != NULL)
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18 {
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19 res->rdata = img;
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20 return DMERR_OK;
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21 }
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22 else
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23 return dmferror(res);
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24 }
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25
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26
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27 static void engineResImageFree(DMResource *res)
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28 {
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29 SDL_FreeSurface((SDL_Surface *)res->rdata);
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30 }
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31
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32 static BOOL engineResImageProbe(DMResource *res, const char *fext)
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33 {
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34 (void) res;
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35 return fext != NULL && (strcasecmp(fext, ".jpg") == 0 || strcasecmp(fext, ".png") == 0);
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36 }
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37
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38
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39 #ifdef JSS_SUP_XM
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40 static int engineResModuleLoad(DMResource *res)
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41 {
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42 return jssLoadXM(res, (JSSModule **) &(res->rdata));
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43 }
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44
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45 static void engineResModuleFree(DMResource *res)
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46 {
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47 jssFreeModule((JSSModule *) res->rdata);
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48 }
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49
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50 static BOOL engineResModuleProbe(DMResource *res, const char *fext)
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51 {
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52 (void) res;
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53 return fext != NULL && (strcasecmp(fext, ".xm") == 0 || strcasecmp(fext, ".jmod") == 0);
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54 }
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55 #endif
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56
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57
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58 #ifdef DM_USE_TREMOR
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59 static size_t vorbisFileRead(void *ptr, size_t size, size_t nmemb, void *datasource)
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60 {
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61 return dmfread(ptr, size, nmemb, (DMResource *) datasource);
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62 }
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63
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64 static int vorbisFileSeek(void *datasource, ogg_int64_t offset, int whence)
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65 {
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66 return dmfseek((DMResource *) datasource, offset, whence);
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67 }
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68
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69 static int vorbisFileClose(void *datasource)
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70 {
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71 (void) datasource;
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72 return 0;
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73 }
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74
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75 static long vorbisFileTell(void *datasource)
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76 {
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77 return dmftell((DMResource *) datasource);
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78 }
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79
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80
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81 static ov_callbacks vorbisFileCBS =
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82 {
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83 vorbisFileRead,
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84 vorbisFileSeek,
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85 vorbisFileClose,
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86 vorbisFileTell
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87 };
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88
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89 static int engineResVorbisLoad(DMResource *res)
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90 {
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91 OggVorbis_File vf;
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92
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93 dmMsg(1, "vorbisfile '%s', %d bytes resource loading\n",
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94 res->filename, res->dataSize);
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95
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96 if (ov_open_callbacks(res, &vf, NULL, 0, vorbisFileCBS) < 0)
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97 return DMERR_FOPEN;
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98
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99 res->rdataSize = ov_pcm_total(&vf, -1) * 2 * 2;
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100 if ((res->rdata = dmMalloc(res->rdataSize + 16)) == NULL)
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101 {
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102 ov_clear(&vf);
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103 return DMERR_MALLOC;
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104 }
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105
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106 dmMsg(1, "rdataSize=%d bytes?\n", res->rdataSize);
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107
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108 BOOL eof = FALSE;
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109 int left = res->rdataSize;
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110 char *ptr = res->rdata;
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111 int current_section;
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112 while (!eof && left > 0)
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113 {
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114 int ret = ov_read(&vf, ptr, left > 4096 ? 4096 : left, &current_section);
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115 if (ret == 0)
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116 eof = TRUE;
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117 else
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118 if (ret < 0)
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119 {
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120 ov_clear(&vf);
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121 return DMERR_INVALID_DATA;
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122 }
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123 else
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124 {
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125 left -= ret;
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126 ptr += ret;
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127 }
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128 }
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129
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130 ov_clear(&vf);
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131 return DMERR_OK;
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132 }
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133
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134 static void engineResVorbisFree(DMResource *res)
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135 {
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136 dmFree(res->rdata);
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137 }
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138
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139 static BOOL engineResVorbisProbe(DMResource *res, const char *fext)
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140 {
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141 (void) res;
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142 return fext != NULL && (strcasecmp(fext, ".ogg") == 0);
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143 }
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144 #endif
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145
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146
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147 static DMResourceDataOps engineResOps[] =
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148 {
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149 {
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150 engineResImageProbe,
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151 engineResImageLoad,
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152 engineResImageFree
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153 },
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154
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155 #ifdef JSS_SUP_XM
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156 {
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157 engineResModuleProbe,
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158 engineResModuleLoad,
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159 engineResModuleFree
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160 },
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161 #endif
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162
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163 #ifdef DM_USE_TREMOR
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164 {
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165 engineResVorbisProbe,
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166 engineResVorbisLoad,
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167 engineResVorbisFree
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168 },
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169 #endif
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170 };
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171
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172 static const int nengineResOps = sizeof(engineResOps) / sizeof(engineResOps[0]);
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173
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174
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175 int engineClassifier(DMResource *res)
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176 {
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177 int i;
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178 char *fext;
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179
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180 if (res == NULL)
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181 return DMERR_NULLPTR;
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182
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183 fext = strrchr(res->filename, '.');
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184 for (i = 0; i < nengineResOps; i++)
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185 {
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186 DMResourceDataOps *rops = &engineResOps[i];
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187 if (rops->probe != NULL && rops->probe(res, fext))
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188 {
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189 res->rops = rops;
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190 return DMERR_OK;
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191 }
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192 }
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193
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194 return DMERR_OK;
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195 }
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196
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197
366
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198 void *engineGetResource(DMEngineData *eng, const char *name)
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199 {
366
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200 DMResource *res;
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201 if (eng != NULL &&
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202 (res = dmres_find(eng->resources, name)) != NULL &&
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203 res->rdata != NULL)
342
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204 return res->rdata;
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205 else
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206 {
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207 dmError("Could not find resource '%s'.\n", name);
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208 return NULL;
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209 }
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210 }
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211
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212
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213 #ifdef DM_USE_JSS
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214 void engineGetJSSInfo(DMEngineData *eng, BOOL *playing, int *order, JSSPattern **pat, int *npattern, int *row)
342
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215 {
366
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216 JSS_LOCK(eng->plr);
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217
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218 *playing = eng->plr->isPlaying;
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219 *row = eng->plr->row;
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220 *pat = eng->plr->pattern;
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221 *npattern = eng->plr->npattern;
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222 *order = eng->plr->order;
342
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223
366
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224 JSS_UNLOCK(eng->plr);
342
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225 }
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226
366
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227 void engineGetJSSChannelInfo(DMEngineData *eng, const int channel, int *ninst, int *nextInst, int *freq, int *note)
342
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228 {
366
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229 JSS_LOCK(eng->plr);
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230 JSSPlayerChannel *chn = &(eng->plr->channels[channel]);
342
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231 *ninst = chn->ninstrument;
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232 *nextInst = chn->nextInstrument;
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233 *freq = chn->freq;
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234 *note = chn->note;
366
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235 JSS_UNLOCK(eng->plr);
342
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236 }
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237 #endif