Mercurial > hg > dmlib
annotate jssmod.c @ 56:8725853609db
Remove the floating point mixing .. it wasn't so good idea after all.
| author | Matti Hamalainen <ccr@tnsp.org> |
|---|---|
| date | Mon, 01 Oct 2012 06:59:00 +0300 |
| parents | 36e2f910219c |
| children | a17e54015bd9 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 * miniJSS - Module structure and handling routines | |
| 3 * Programmed and designed by Matti 'ccr' Hamalainen | |
| 4 * (C) Copyright 2006-2007 Tecnic Software productions (TNSP) | |
| 5 */ | |
| 6 #include "jssmod.h" | |
| 7 #include <string.h> | |
| 8 | |
| 9 | |
| 10 #ifndef JSS_LIGHT | |
| 11 /* Take given data until maxlen reached, make a string | |
| 12 */ | |
| 13 char *jssASCIItoStr(char * sdata, const char endByte, const size_t maxLen) | |
| 14 { | |
| 15 size_t i, k; | |
| 16 char *res; | |
| 17 | |
| 18 for (i = 0; sdata[i] && i < maxLen; i++); | |
| 19 | |
| 20 res = (char *) dmMalloc(i + 1); | |
| 21 if (res == NULL) | |
| 22 return NULL; | |
| 23 | |
| 24 for (k = 0; sdata[k] != endByte && k < i; k++) | |
| 25 res[k] = sdata[k]; | |
| 26 | |
| 27 res[k] = 0; | |
| 28 | |
| 29 return res; | |
| 30 } | |
| 31 | |
| 32 | |
| 33 /* Encodes a given 8-bit sample | |
| 34 */ | |
| 43 | 35 BOOL jssEncodeSample8(Uint8 * data, const size_t len, const int ops) |
| 0 | 36 { |
| 43 | 37 size_t count = len; |
| 0 | 38 Sint8 t, value = 0; |
| 39 | |
| 43 | 40 while (count--) |
| 0 | 41 { |
| 43 | 42 t = *data; |
| 0 | 43 |
| 44 if (ops & jsampFlipSign) | |
| 45 t ^= 0x80; | |
| 46 | |
| 47 if (ops & jsampDelta) | |
| 48 { | |
| 49 int n = t - value; | |
| 50 value = t; | |
| 51 t = n; | |
| 52 } | |
| 53 | |
| 43 | 54 *(data++) = t; |
| 0 | 55 } |
| 56 | |
| 57 return TRUE; | |
| 58 } | |
| 59 | |
| 60 | |
| 61 /* Decodes a given 16-bit sample | |
| 62 */ | |
| 43 | 63 BOOL jssEncodeSample16(Uint16 * data, const size_t len, const int ops) |
| 0 | 64 { |
| 65 // "Split" the 16-bit samples into 8-bit halves | |
| 66 if (ops & jsampSplit) | |
| 67 { | |
| 68 // Allocate temporary processing buffer | |
| 43 | 69 size_t count, bufSize = len * sizeof(Sint16); |
| 0 | 70 Uint8 *bp1, *bp2; |
| 43 | 71 Sint16 *sdata, *tmpBuf = dmMalloc(bufSize); |
| 0 | 72 if (tmpBuf == NULL) return FALSE; |
| 73 | |
| 74 sdata = tmpBuf; | |
| 43 | 75 bp1 = (Uint8 *) data; |
| 76 bp2 = bp1 + len; | |
| 77 count = len; | |
| 0 | 78 |
| 43 | 79 while (count--) |
| 0 | 80 { |
| 43 | 81 Sint16 t = (*sdata++); |
| 0 | 82 *bp1++ = t >> 8; |
| 83 *bp2++ = t & 0xff; | |
| 84 } | |
| 85 | |
| 43 | 86 memcpy(data, tmpBuf, bufSize); |
| 0 | 87 dmFree(tmpBuf); |
| 88 | |
| 43 | 89 return jssEncodeSample8((Uint8 *) data, bufSize, ops); |
| 0 | 90 } |
| 91 else | |
| 92 { | |
| 43 | 93 Sint16 t, p, value = 0, *sdata = (Sint16 *) data; |
| 94 size_t count = len; | |
| 0 | 95 |
| 43 | 96 while (count--) |
| 0 | 97 { |
| 98 if (ops & jsampSwapEndianess) | |
| 99 { | |
| 100 p = *sdata; | |
| 101 t = ((p >> 8) & 0xff) | ((p & 0xff) << 8); | |
| 102 } else | |
| 103 t = *sdata; | |
| 104 | |
| 105 if (ops & jsampDelta) | |
| 106 { | |
| 107 int n = t - value; | |
| 108 value = t; | |
| 109 t = n; | |
| 110 } | |
| 111 | |
| 112 if (ops & jsampFlipSign) | |
| 113 t ^= 0x8000; | |
| 114 | |
| 115 *(sdata++) = t; | |
| 116 } | |
| 117 } | |
| 118 return TRUE; | |
| 119 } | |
|
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120 |
| 0 | 121 #endif |
| 122 | |
| 123 | |
| 124 /* Decodes a given 8-bit sample | |
| 125 */ | |
| 43 | 126 BOOL jssDecodeSample8(Uint8 * data, const size_t len, const int ops) |
| 0 | 127 { |
| 43 | 128 size_t count = len; |
| 0 | 129 Sint8 t, value = 0; |
| 130 | |
| 43 | 131 while (count--) |
| 0 | 132 { |
| 43 | 133 t = *data; |
| 0 | 134 |
| 135 if (ops & jsampDelta) | |
| 136 t = value = t + value; | |
| 137 | |
| 138 if (ops & jsampFlipSign) | |
| 139 t ^= 0x80; | |
| 140 | |
| 43 | 141 *(data++) = t; |
| 0 | 142 } |
| 143 return TRUE; | |
| 144 } | |
| 145 | |
| 146 | |
| 147 /* Decodes a given 16-bit sample | |
| 148 */ | |
| 43 | 149 BOOL jssDecodeSample16(Uint16 * data, const size_t len, const int ops) |
| 0 | 150 { |
| 151 if (ops & jsampSplit) | |
| 152 { | |
| 43 | 153 size_t count, bufSize = len * sizeof(Uint16); |
| 0 | 154 Uint8 *bp1, *bp2; |
| 155 Sint16 *tmpBuf, *sdata; | |
| 156 | |
| 43 | 157 if (!jssDecodeSample8((Uint8 *) data, bufSize, ops)) |
| 0 | 158 return FALSE; |
| 159 | |
| 160 tmpBuf = dmMalloc(bufSize); | |
| 161 if (tmpBuf == NULL) return FALSE; | |
| 43 | 162 memcpy(tmpBuf, data, bufSize); |
| 0 | 163 |
| 43 | 164 sdata = (Sint16 *) data; |
| 0 | 165 bp1 = (Uint8 *) tmpBuf; |
| 43 | 166 bp2 = bp1 + len; |
| 167 count = len; | |
| 168 while (count--) | |
| 0 | 169 { |
| 170 *sdata++ = (*bp1++ << 8) | (*bp2++ & 0xff); | |
| 171 } | |
| 172 | |
| 173 dmFree(tmpBuf); | |
| 174 } | |
| 175 else | |
| 176 { | |
| 43 | 177 Sint16 t, p, value = 0, *sdata = (Sint16 *) data; |
| 178 size_t count = len; | |
| 179 while (count--) | |
| 0 | 180 { |
| 181 if (ops & jsampSwapEndianess) | |
| 182 { | |
| 183 p = *sdata; | |
| 184 t = ((p >> 8) & 0xff) | ((p & 0xff) << 8); | |
| 185 } else | |
| 186 t = *sdata; | |
| 187 | |
| 188 if (ops & jsampDelta) | |
| 189 t = value = t + value; | |
| 190 | |
| 191 if (ops & jsampFlipSign) | |
| 192 t ^= 0x8000; | |
| 193 | |
| 194 *(sdata++) = t; | |
| 195 } | |
| 196 } | |
| 197 return TRUE; | |
| 198 } | |
| 199 | |
|
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200 |
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201 /* Convert sample data from U8 to S16 |
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202 */ |
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203 int jssConvertSampleTo16(void **dst, void * src, const size_t len) |
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204 { |
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205 size_t count = len; |
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206 Uint8 *in = (Uint8 *) src; |
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207 Sint16 *out; |
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208 |
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209 *dst = out = dmMalloc(sizeof(Sint16) * len); |
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210 if (out == NULL) |
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211 return DMERR_MALLOC; |
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212 |
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213 while (count--) |
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214 { |
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215 *(out++) = (*(in++) * 256) - 32768; |
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216 } |
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217 |
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218 return DMERR_OK; |
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219 } |
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220 |
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221 /* Converts the given module in preparation for playing it. |
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222 * This involves sample format conversion (8 to 16 bit, etc.) |
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223 * |
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224 * NOTICE! The converted module can only be saved in JSSMOD |
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225 * format, but this is not recommended. |
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226 */ |
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227 int jssConvertModuleForPlaying(JSSModule *module) |
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228 { |
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229 int i; |
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230 if (module == NULL) |
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231 return DMERR_NULLPTR; |
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232 |
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233 // Convert instruments |
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234 for (i = 0; i < module->ninstruments; i++) |
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235 { |
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236 JSSInstrument *inst = module->instruments[i]; |
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237 if (inst != NULL && inst->data != NULL) |
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238 { |
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239 int res; |
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240 void *data = NULL; |
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241 |
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242 if (inst->flags & jsf16bit) |
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243 continue; |
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244 |
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245 if ((res = jssConvertSampleTo16(&data, inst->data, inst->size)) != DMERR_OK) |
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246 return res; |
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247 |
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248 inst->flags |= jsf16bit; |
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249 dmFree(inst->data); |
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250 inst->data = data; |
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251 } |
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252 } |
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253 |
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254 return DMERR_OK; |
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255 } |
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256 |
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257 |
| 0 | 258 /* Allocates a new module structure or returns errorvalue if failed. |
| 259 * Memory is allocated only for the basic structure. Sample- and pattern | |
| 260 * areas must be allocated separately with appropriate routines. | |
| 261 */ | |
| 262 JSSModule *jssAllocateModule(void) | |
| 263 { | |
| 264 int i; | |
| 265 JSSModule *module; | |
| 266 | |
| 267 // Allocate module structure | |
| 268 module = dmMalloc0(sizeof(JSSModule)); | |
| 269 if (module == NULL) | |
| 270 return NULL; | |
| 271 | |
| 272 // Initialize structure | |
| 273 for (i = 0; i < jsetNChannels; i++) | |
| 274 module->defPanning[i] = jchPanMiddle; | |
| 275 | |
| 276 for (i = 0; i < jsetMaxOrders; i++) | |
| 277 module->orderList[i] = jsetOrderEnd; | |
| 278 | |
| 279 // Allocate mutex | |
| 280 #ifdef JSS_SUP_THREADS | |
| 281 module->mutex = dmCreateMutex(); | |
| 282 #endif | |
| 283 | |
| 284 return module; | |
| 285 } | |
| 286 | |
| 287 | |
| 288 /* Frees a given module structure, freeing all memory areas | |
| 289 * that were allocated for it (including patterns, samples, etc.) | |
| 290 */ | |
| 291 int jssFreeModule(JSSModule * module) | |
| 292 { | |
| 293 int i; | |
| 294 | |
| 295 if (module == NULL) | |
| 296 return DMERR_NULLPTR; | |
| 297 | |
| 298 // Free strings | |
| 299 #ifndef JSS_LIGHT | |
| 300 dmFree(module->moduleName); | |
| 301 dmFree(module->trackerName); | |
| 302 #endif | |
| 303 | |
| 304 // Free patterns | |
| 305 for (i = 0; i < module->npatterns; i++) | |
| 306 { | |
| 307 if (module->patterns[i]) | |
| 308 { | |
| 309 JSSPattern *pat = module->patterns[i]; | |
| 310 dmFree(pat->data); | |
| 311 dmFree(pat); | |
| 312 module->patterns[i] = NULL; | |
| 313 } | |
| 314 } | |
| 315 | |
| 316 // Free instruments | |
| 317 for (i = 0; i < module->ninstruments; i++) | |
| 318 { | |
| 319 if (module->instruments[i]) | |
| 320 { | |
| 321 JSSInstrument *inst = module->instruments[i]; | |
| 322 #ifndef JSS_LIGHT | |
| 323 dmFree(inst->desc); | |
| 324 #endif | |
| 325 dmFree(inst->data); | |
| 326 dmFree(inst); | |
| 327 module->instruments[i] = NULL; | |
| 328 } | |
| 329 } | |
| 330 | |
| 331 // Free extended instruments | |
| 332 for (i = 0; i < module->nextInstruments; i++) | |
| 333 { | |
| 334 if (module->extInstruments[i]) | |
| 335 { | |
| 336 JSSExtInstrument *ext = module->extInstruments[i]; | |
| 337 #ifndef JSS_LIGHT | |
| 338 dmFree(ext->desc); | |
| 339 #endif | |
| 340 dmFree(ext); | |
| 341 module->extInstruments[i] = NULL; | |
| 342 } | |
| 343 } | |
| 344 | |
| 345 // Free mutex | |
| 346 #ifdef JSS_SUP_THREADS | |
| 347 dmDestroyMutex(module->mutex); | |
| 348 #endif | |
| 349 | |
| 350 // Free the module structure | |
| 351 memset(module, 0, sizeof(JSSModule)); | |
| 352 dmFree(module); | |
| 353 | |
| 354 return DMERR_OK; | |
| 355 } | |
| 356 | |
| 357 | |
| 358 /* Allocates and initializes a internal pattern structure. | |
| 359 */ | |
| 360 JSSPattern *jssAllocatePattern(int nrows, int nchannels) | |
| 361 { | |
| 362 int i, j; | |
| 363 JSSPattern *res; | |
| 364 JSSNote *pnote; | |
| 365 | |
| 366 // Check arguments | |
| 367 if (nrows <= 0 || nchannels <= 0) | |
| 368 JSSERROR(DMERR_INVALID_ARGS, NULL, "Invalid nrows=%i or nchannels=%i.\n", nrows, nchannels); | |
| 369 | |
| 370 // Allocate a pattern structure | |
| 371 res = dmMalloc0(sizeof(JSSPattern)); | |
| 372 if (res == NULL) | |
| 373 JSSERROR(DMERR_MALLOC, NULL, "Could not allocate pattern structure.\n"); | |
| 374 | |
| 375 // Allocate notedata | |
| 376 res->data = dmCalloc(nrows * nchannels, sizeof(JSSNote)); | |
| 377 if (res->data == NULL) | |
| 378 { | |
| 379 dmFree(res); | |
| 380 JSSERROR(DMERR_MALLOC, NULL, "Could not allocate pattern data (nrows=%i, nchannels=%i).\n", nrows, | |
| 381 nchannels); | |
| 382 } | |
| 383 | |
| 384 // Initialize | |
| 385 res->nrows = nrows; | |
| 386 res->nchannels = nchannels; | |
| 387 | |
| 388 pnote = res->data; | |
| 389 for (j = 0; j < nrows; j++) | |
| 390 { | |
| 391 for (i = 0; i < nchannels; i++) | |
| 392 { | |
| 393 pnote->note = pnote->instrument = pnote->volume = | |
| 394 pnote->effect = pnote->param = jsetNotSet; | |
| 395 | |
| 396 pnote++; | |
| 397 } | |
| 398 } | |
| 399 | |
| 400 // OK, return pointer to struct | |
| 401 return res; | |
| 402 } | |
| 403 | |
| 404 | |
| 405 /* Allocates and initializes internal "normal" instrument structure. | |
| 406 */ | |
| 407 JSSInstrument *jssAllocateInstrument(void) | |
| 408 { | |
| 409 JSSInstrument *res; | |
| 410 | |
| 411 // Allocate a instrument structure | |
| 412 res = dmMalloc0(sizeof(JSSInstrument)); | |
| 413 if (res == NULL) | |
| 414 return NULL; | |
| 415 | |
| 416 return res; | |
| 417 } | |
| 418 | |
| 419 | |
| 420 /* Allocates and initializes "extended" instrument structure. | |
| 421 */ | |
| 422 JSSExtInstrument *jssAllocateExtInstrument(void) | |
| 423 { | |
| 424 int i; | |
| 425 JSSExtInstrument *res; | |
| 426 | |
| 427 // Allocate a instrument structure | |
| 428 res = dmMalloc0(sizeof(JSSExtInstrument)); | |
| 429 if (res == NULL) | |
| 430 return NULL; | |
| 431 | |
| 432 for (i = 0; i < jsetNNotes; i++) | |
| 433 { | |
| 434 res->sNumForNotes[i] = jsetNotSet; | |
| 435 } | |
| 436 | |
| 437 return res; | |
| 438 } |