Files: 91e07c37ef88e4b9783f5a51c82e0e614f615a64 / src / syntrax / syntrax.c
20557 bytesRaw
| 1 | |
| 2 | |
| 3 | |
| 4 | |
| 5 | |
| 6 | void advanceTick() |
| 7 | { |
| 8 | int i; |
| 9 | ABH(); |
| 10 | |
| 11 | for (i = 0; i < channelNumber; i++) { |
| 12 | channelSomething(i); |
| 13 | Voice *v = voices[i]; |
| 14 | if (tuneChannels[i].insNum != -1) { |
| 15 | channelSomethingElse(i); |
| 16 | instrEffect(i); |
| 17 | } |
| 18 | } |
| 19 | } |
| 20 | |
| 21 | void mixChunk(int16_t *outBuff, uint playbackBufferSize) |
| 22 | { |
| 23 | |
| 24 | int i, j; |
| 25 | uint sampleNum; |
| 26 | int amp, smp, pos:int; |
| 27 | int16_t audioMainR, audioMainL; |
| 28 | int16_t audioDelayR, audioDelayL; |
| 29 | uint otherDelayTime; |
| 30 | Voice *v |
| 31 | TuneChannel *tc; |
| 32 | |
| 33 | //We just don't know! |
| 34 | uint dword_6632774C = 0; |
| 35 | |
| 36 | if ( channelNumber > 0 ) |
| 37 | { |
| 38 | if ( playbackBufferSize & 1) playbackBufferSize--; |
| 39 | if ( playbackBufferSize <= 0 ) return; |
| 40 | |
| 41 | while ( playbackBufferSize > 0 ) |
| 42 | { |
| 43 | if ( otherSamplesPerBeat >= playbackBufferSize ) |
| 44 | { |
| 45 | otherSamplesPerBeat = otherSamplesPerBeat - playbackBufferSize; |
| 46 | sampleNum = playbackBufferSize; |
| 47 | } |
| 48 | else |
| 49 | { |
| 50 | sampleNum = otherSamplesPerBeat; |
| 51 | otherSamplesPerBeat = samplesPerBeat * SAMPLEFREQUENCY / 44100; |
| 52 | } |
| 53 | playbackBufferSize -= sampleNum; |
| 54 | |
| 55 | for (i=0; i < channelNumber; ++i ) |
| 56 | { |
| 57 | v = voices[i]; tc = tuneChannels[i]; |
| 58 | |
| 59 | int insNum = tc.insNum; |
| 60 | if ( insNum == -1 ) |
| 61 | { |
| 62 | v.waveBuff = silentBuffer; |
| 63 | v.isSample = 0; |
| 64 | } |
| 65 | else if ( !tc.sampleBuffer ) |
| 66 | { |
| 67 | int waveNum = instruments[insNum].waveform; |
| 68 | v.wavelength = (instruments[insNum].wavelength << 8) - 1; |
| 69 | v.waveBuff = tc.synthBuffers[waveNum]; |
| 70 | v.isSample = 0; |
| 71 | } |
| 72 | else |
| 73 | { |
| 74 | v.waveBuff = tc.sampleBuffer; |
| 75 | v.sampPos = tc.sampPos; |
| 76 | v.smpLoopStart = tc.smpLoopStart; |
| 77 | v.smpLoopEnd = tc.smpLoopEnd; |
| 78 | v.hasLoop = tc.hasLoop; |
| 79 | v.hasBidiLoop = tc.hasBidiLoop; |
| 80 | v.isPlayingBackward = tc.isPlayingBackward; |
| 81 | v.hasLooped = tc.hasLooped; |
| 82 | v.isSample = 1; |
| 83 | } |
| 84 | |
| 85 | if ( tc.freq < 10 ) |
| 86 | tc.freq = 10; |
| 87 | |
| 88 | v.gain = (tc.volume + 10000) / 39; |
| 89 | v.delta = (tc.freq << 8) / SAMPLEFREQUENCY; |
| 90 | |
| 91 | if ( v.gain > 0x100 ) |
| 92 | v.gain = 0x100; |
| 93 | if ( tc.panning ) |
| 94 | { |
| 95 | if ( tc.panning <= 0 ) |
| 96 | { |
| 97 | v.gainRight = 0x100; |
| 98 | v.gainLeft = 0x100 + tc.panning; |
| 99 | } |
| 100 | else |
| 101 | { |
| 102 | v.gainLeft = 0x100; |
| 103 | v.gainRight = 0x100 - tc.panning; |
| 104 | } |
| 105 | } |
| 106 | else |
| 107 | { |
| 108 | v.gainRight = 0x100; |
| 109 | v.gainLeft = 0x100; |
| 110 | } |
| 111 | if ( dword_6632774C ) |
| 112 | { |
| 113 | //v.gainDelay = word_6632B9F4[i]; |
| 114 | } |
| 115 | else |
| 116 | { |
| 117 | v.gainDelay = curSubsong.chanDelayAmt[i]; |
| 118 | } |
| 119 | v.gainRight = (v.gain * v.gainRight) >> 8; |
| 120 | v.gainLeft = (v.gain * v.gainLeft) >> 8; |
| 121 | v.gainDelayRight = (v.gainDelay * v.gainRight) >> 8; |
| 122 | v.gainDelayLeft = (v.gainDelay * v.gainLeft) >> 8; |
| 123 | } |
| 124 | if ( dword_6632774C ) |
| 125 | { |
| 126 | //amp = word_6632B964; |
| 127 | //otherDelayTime = word_6632BB24; |
| 128 | } |
| 129 | else |
| 130 | { |
| 131 | amp = curSubsong.amplification; |
| 132 | otherDelayTime = curSubsong.delayTime / (44100 / SAMPLEFREQUENCY); |
| 133 | } |
| 134 | if ( outBuff ) |
| 135 | { |
| 136 | if ( sampleNum > 0 ) |
| 137 | { |
| 138 | for(i = 0; i < sampleNum; i++) |
| 139 | { |
| 140 | audioMainR = 0; |
| 141 | audioMainL = 0; |
| 142 | audioDelayR = 0; |
| 143 | audioDelayL = 0; |
| 144 | if ( channelNumber > 0 ) |
| 145 | { |
| 146 | for (j = 0; j < channelNumber; ++j) |
| 147 | { |
| 148 | v = voices[j]; |
| 149 | if ( v.isSample == 1 ) |
| 150 | { |
| 151 | if ( v.sampPos != -1 ) |
| 152 | { |
| 153 | //interpolation |
| 154 | //smp = intp.interpSamp(v); |
| 155 | smp = v.waveBuff[v.sampPos>>8]; |
| 156 | |
| 157 | audioMainR += (smp * v.gainRight) >> 8; |
| 158 | audioMainL += (smp * v.gainLeft) >> 8; |
| 159 | audioDelayR += (smp * v.gainDelayRight) >> 8; |
| 160 | audioDelayL += (smp * v.gainDelayLeft) >> 8; |
| 161 | if ( v.isPlayingBackward ) |
| 162 | { |
| 163 | v.sampPos -= v.delta; |
| 164 | if ( v.sampPos <= v.smpLoopStart ) |
| 165 | { |
| 166 | v.isPlayingBackward = 0; |
| 167 | v.sampPos += v.delta; |
| 168 | } |
| 169 | } |
| 170 | else |
| 171 | { |
| 172 | v.sampPos += v.delta; |
| 173 | if ( v.sampPos >= v.smpLoopEnd ) |
| 174 | { |
| 175 | if ( v.hasLoop ) |
| 176 | { |
| 177 | v.hasLooped = 1; |
| 178 | if ( v.hasBidiLoop ) |
| 179 | { |
| 180 | v.isPlayingBackward = 1; |
| 181 | v.sampPos -= v.delta; |
| 182 | } |
| 183 | else |
| 184 | { |
| 185 | v.sampPos += v.smpLoopStart - v.smpLoopEnd; |
| 186 | } |
| 187 | } |
| 188 | else |
| 189 | { |
| 190 | v.sampPos = -1; |
| 191 | } |
| 192 | } |
| 193 | } |
| 194 | } |
| 195 | } |
| 196 | else |
| 197 | { |
| 198 | //interpolation |
| 199 | //smp = intp.interpSynt(v); |
| 200 | smp = v.waveBuff[v.synthPos>>8]; |
| 201 | |
| 202 | audioMainR += (smp * v.gainRight) >> 8; |
| 203 | audioMainL += (smp * v.gainLeft) >> 8; |
| 204 | audioDelayR += (smp * v.gainDelayRight) >> 8; |
| 205 | audioDelayL += (smp * v.gainDelayLeft) >> 8; |
| 206 | v.synthPos += v.delta; |
| 207 | v.synthPos &= v.wavelength; |
| 208 | } |
| 209 | } |
| 210 | } |
| 211 | |
| 212 | audioMainL = (delayBufferL[delayPos] + audioMainL / channelNumber) / 2; |
| 213 | audioMainR = (delayBufferR[delayPos] + audioMainR / channelNumber) / 2; |
| 214 | audioMainR = audioMainR * amp / 100; |
| 215 | audioMainL = audioMainL * amp / 100; |
| 216 | //clip audio |
| 217 | if ( audioMainR < -32760 ) audioMainR = -32760; |
| 218 | if ( audioMainR > 32760 ) audioMainR = 32760; |
| 219 | if ( audioMainL < -32760 ) audioMainL = -32760; |
| 220 | if ( audioMainL > 32760 ) audioMainL = 32760; |
| 221 | |
| 222 | //interleaved buffer |
| 223 | if ( overlapPos < SE_OVERLAP ) |
| 224 | { |
| 225 | audioMainR = overlapPos * audioMainR / 100; |
| 226 | audioMainR += (SE_OVERLAP - overlapPos) * overlapBuff[overlapPos*2] / 100; |
| 227 | audioMainL = overlapPos * audioMainL / 100; |
| 228 | audioMainL += (SE_OVERLAP - overlapPos) * overlapBuff[overlapPos*2+1] / 100; |
| 229 | ++overlapPos; |
| 230 | } |
| 231 | |
| 232 | //output |
| 233 | *outbuff++ = audioMainR; |
| 234 | *outbuff++ = audioMainL; |
| 235 | |
| 236 | delayBufferL[delayPos] = (((audioDelayL / channelNumber) + delayBufferL[delayPos]) / 2); |
| 237 | delayBufferR[delayPos] = (((audioDelayR / channelNumber) + delayBufferR[delayPos]) / 2); |
| 238 | delayPos = ++delayPos % otherDelayTime; |
| 239 | } |
| 240 | } |
| 241 | } |
| 242 | |
| 243 | if ( channelNumber > 0 ) |
| 244 | { |
| 245 | for (i = 0; i < channelNumber; ++i) |
| 246 | { |
| 247 | v = voices[i]; tc = tuneChannels[i]; |
| 248 | if ( v.isSample ) |
| 249 | { |
| 250 | tc.sampPos = v.sampPos; |
| 251 | tc.isPlayingBackward = v.isPlayingBackward; |
| 252 | tc.hasLooped = v.hasLooped; |
| 253 | } |
| 254 | } |
| 255 | } |
| 256 | if ( otherSamplesPerBeat == (samplesPerBeat * SAMPLEFREQUENCY) / 44100 ) |
| 257 | { |
| 258 | bkpDelayPos = delayPos; |
| 259 | for (i = 0; i < channelNumber; i++) voices[i].bkpSynthPos = voices[i].synthPos; |
| 260 | |
| 261 | overlapPos = 0; |
| 262 | if ( outBuff ) |
| 263 | { |
| 264 | for (i = 0; i < SE_OVERLAP; i++) |
| 265 | { |
| 266 | audioMainR = 0; |
| 267 | audioMainL = 0; |
| 268 | audioDelayR = 0; |
| 269 | audioDelayL = 0; |
| 270 | if ( channelNumber > 0 ) |
| 271 | { |
| 272 | for (j = 0; j < channelNumber; j++) |
| 273 | { |
| 274 | v = voices[j]; |
| 275 | if ( v.isSample == 1 ) |
| 276 | { |
| 277 | if ( v.sampPos != -1 ) |
| 278 | { |
| 279 | //interpolation |
| 280 | //smp = intp.interpSamp(v); |
| 281 | smp = v.waveBuff[v.sampPos>>8]; |
| 282 | |
| 283 | audioMainR += (smp * v.gainRight) >> 8; |
| 284 | audioMainL += (smp * v.gainLeft) >> 8; |
| 285 | audioDelayR += (smp * v.gainDelayRight) >> 8; |
| 286 | audioDelayL += (smp * v.gainDelayLeft) >> 8; |
| 287 | if ( v.isPlayingBackward ) |
| 288 | { |
| 289 | v.sampPos -= v.delta; |
| 290 | if ( v.sampPos <= v.smpLoopStart ) |
| 291 | { |
| 292 | v.isPlayingBackward = 0; |
| 293 | v.sampPos += v.delta; |
| 294 | } |
| 295 | } |
| 296 | else |
| 297 | { |
| 298 | v.sampPos += v.delta; |
| 299 | if ( v.sampPos >= v.smpLoopEnd ) |
| 300 | { |
| 301 | if ( v.hasLoop ) |
| 302 | { |
| 303 | v.hasLooped = 1; |
| 304 | if ( v.hasBidiLoop ) |
| 305 | { |
| 306 | v.isPlayingBackward = 1; |
| 307 | v.sampPos -= v.delta; |
| 308 | } |
| 309 | else |
| 310 | { |
| 311 | v.sampPos += v.smpLoopStart - v.smpLoopEnd; |
| 312 | } |
| 313 | } |
| 314 | else |
| 315 | { |
| 316 | v.sampPos = -1; |
| 317 | } |
| 318 | } |
| 319 | } |
| 320 | } |
| 321 | } |
| 322 | else |
| 323 | { |
| 324 | //interpolation |
| 325 | //smp = intp.interpSynt(v); |
| 326 | smp = v.waveBuff[v.synthPos>>8]; |
| 327 | |
| 328 | audioMainR += (smp * v.gainRight) >> 8; |
| 329 | audioMainL += (smp * v.gainLeft) >> 8; |
| 330 | audioDelayR += (smp * v.gainDelayRight) >> 8; |
| 331 | audioDelayL += (smp * v.gainDelayLeft) >> 8; |
| 332 | v.synthPos += v.delta; |
| 333 | v.synthPos &= v.wavelength; |
| 334 | } |
| 335 | } |
| 336 | } |
| 337 | |
| 338 | audioMainL = (delayBufferL[delayPos] + audioMainL / channelNumber) / 2; |
| 339 | audioMainR = (delayBufferR[delayPos] + audioMainR / channelNumber) / 2; |
| 340 | audioMainR = audioMainR * amp / 100; |
| 341 | audioMainL = audioMainL * amp / 100; |
| 342 | //clip audio |
| 343 | if ( audioMainR < -32760 ) audioMainR = -32760; |
| 344 | if ( audioMainR > 32760 ) audioMainR = 32760; |
| 345 | if ( audioMainL < -32760 ) audioMainL = -32760; |
| 346 | if ( audioMainL > 32760 ) audioMainL = 32760; |
| 347 | |
| 348 | overlapBuff[i * 2] = audioMainR; |
| 349 | overlapBuff[i*2+1] = audioMainL; |
| 350 | |
| 351 | delayPos = ++delayPos % otherDelayTime; |
| 352 | } |
| 353 | } |
| 354 | delayPos = bkpDelayPos; |
| 355 | for (i = 0; i < channelNumber; i++) voices[i].synthPos = voices[i].bkpSynthPos; |
| 356 | |
| 357 | //dword_66327200 = 2 * sampleNum; |
| 358 | advanceTick(); |
| 359 | } |
| 360 | } |
| 361 | return; |
| 362 | } |
| 363 | if ( playbackBufferSize <= 0 ) return; |
| 364 | //blank write to playback buffer |
| 365 | memset(outbuff, 0, playbackBufferSize * 2); |
| 366 | } |
| 367 | |
| 368 | void pausePlay(void) |
| 369 | { |
| 370 | isPaused = 1; |
| 371 | } |
| 372 | |
| 373 | void resumePlay(void) |
| 374 | { |
| 375 | isPaused = 0; |
| 376 | } |
| 377 | |
| 378 | void reset(void) |
| 379 | { |
| 380 | int i, j; |
| 381 | |
| 382 | //dem assumptions |
| 383 | if (delayBufferL && delayBufferR){ |
| 384 | memset(delayBufferL, 0, 65536); |
| 385 | memset(delayBufferR, 0, 65536); |
| 386 | } |
| 387 | if (tuneChannels){ |
| 388 | |
| 389 | for (i = 0; i < SE_MAXCHANS; i++) { |
| 390 | TuneChannel *tc: = tuneChannels[i]; |
| 391 | |
| 392 | tc.EQMIWERPIF = 0; |
| 393 | tc.LJHG = 0; |
| 394 | tc.insNum = -1; |
| 395 | tc.HFRLJCG = 0; |
| 396 | tc.ACKCWV = 0; |
| 397 | tc.ELPHLDR = 0; |
| 398 | tc.TVORFCC = 0; |
| 399 | tc.freq = 0; |
| 400 | tc.BNWIGU = 0; |
| 401 | tc.UHYDBDDI = 0; |
| 402 | tc.XESAWSO = 0; |
| 403 | tc.JOEEPJCI = 0; |
| 404 | tc.fmDelay = 0; |
| 405 | tc.sampleBuffer = null; |
| 406 | tc.smpLoopEnd = 0; |
| 407 | //tuneChan.smpLength = 0; |
| 408 | tc.sampPos = 0; |
| 409 | tc.EYRXAB = 0; |
| 410 | tc.volume = 0; |
| 411 | tc.panning = 0; |
| 412 | tc.VNVJPDIWAJQ = 0; |
| 413 | tc.smpLoopStart = 0; |
| 414 | tc.hasLoop = 0; |
| 415 | tc.hasBidiLoop = 0; |
| 416 | tc.isPlayingBackward = 0; |
| 417 | tc.hasLooped = 0; |
| 418 | |
| 419 | for (j = 0; j < 4; j++) { |
| 420 | VoiceEffect *voiceEffect = tc.effects[j]; |
| 421 | |
| 422 | voiceEffect.QOMCBTRPXF = 0; |
| 423 | voiceEffect.TIPUANVVR = 0; |
| 424 | voiceEffect.MFATTMREMVP = 0; |
| 425 | voiceEffect.MDTMBBIQHRQ = 0; |
| 426 | voiceEffect.RKF = 0; |
| 427 | voiceEffect.DQVLFV = 0; |
| 428 | voiceEffect.ILHG = 0; |
| 429 | voiceEffect.YLKJB = 0; |
| 430 | voiceEffect.VMBNMTNBQU = 0; |
| 431 | voiceEffect.ABJGHAUY = 0; |
| 432 | voiceEffect.SPYK = 0; |
| 433 | |
| 434 | } |
| 435 | |
| 436 | memset(tc.synthBuffers, 0, 0x100 * SE_MAXCHANS + 1); |
| 437 | } |
| 438 | } |
| 439 | } |
| 440 | |
| 441 | void newSong(void) |
| 442 | { |
| 443 | var _local1:int; |
| 444 | var i:int; |
| 445 | var j:int; |
| 446 | var _local4:Order; |
| 447 | var _local6:Vector.<Order>; |
| 448 | var _local7:Row; |
| 449 | |
| 450 | reset(); |
| 451 | AMYGPFQCHSW = 1; |
| 452 | selectedSubsong = 0; |
| 453 | WDTECTE = 8; |
| 454 | AMVM = 0x0100; |
| 455 | synSong.h.subsongNum = 1; |
| 456 | synSong.h.version = 3457; |
| 457 | subsongs = new Vector.<Subsong>(); |
| 458 | subsongs.push(new Subsong()); |
| 459 | var subs0:Subsong = subsongs[0]; |
| 460 | curSubsong = subsongs[selectedSubsong]; |
| 461 | |
| 462 | subs0.tempo = 120; |
| 463 | subs0.groove = 0; |
| 464 | subs0.startPosCoarse = 0; |
| 465 | subs0.startPosFine = 0; |
| 466 | subs0.loopPosCoarse = 0; |
| 467 | subs0.loopPosFine = 0; |
| 468 | subs0.endPosCoarse = 1; |
| 469 | subs0.endPosFine = 0; |
| 470 | subs0.channelNumber = 4; |
| 471 | subs0.delayTime = 0x8000; |
| 472 | subs0.amplification = 400; |
| 473 | subs0.chanDelayAmt = new Vector.<int>(SE_MAXCHANS, true); |
| 474 | |
| 475 | subs0.m_Name = "Empty"; |
| 476 | subs0.mutedChans = new Vector.<int>(SE_MAXCHANS, true); |
| 477 | |
| 478 | |
| 479 | subs0.orders = Tools.malloc_2DVector(Order, SE_MAXCHANS, 0x0100, true, true); |
| 480 | for (i = 0; i < SE_MAXCHANS; i++) { |
| 481 | _local6 = subs0.orders[i]; |
| 482 | for (j = 0; j < 0x0100; j++) { |
| 483 | _local6[j].patIndex = 0; |
| 484 | _local6[j].patLen = 0; |
| 485 | } |
| 486 | } |
| 487 | |
| 488 | synSong.h.patNum = 2; |
| 489 | synSong.rows = Tools.malloc_1DVector(Row, 64 * synSong.h.patNum); |
| 490 | |
| 491 | for (i = 0; i < (64 * synSong.h.patNum); i++) { |
| 492 | rows[i].dest = 0; |
| 493 | rows[i].note = 0; |
| 494 | rows[i].instr = 0; |
| 495 | rows[i].command = 0; |
| 496 | rows[i].spd = 0; |
| 497 | |
| 498 | } |
| 499 | patternNames = new Vector.<String>(); |
| 500 | patternNames.push("Empty"); |
| 501 | patternNames.push("Pat1"); |
| 502 | synSong.h.instrNum = 1; |
| 503 | synSong.instruments = new Vector.<Instrument>(); |
| 504 | synSong.instruments.push(new Instrument()); |
| 505 | |
| 506 | mutedChans = new Vector.<int>(SE_MAXCHANS, true); |
| 507 | } |
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