annotate plugin/plugins/SamplePlayer.cpp @ 83:b2067aff8cd6

* Fix crash in spectrogram layer when replacing model * Change sample player's sample path to a single sample directory. This makes it immune to OS path separator differences, and ensures it can reject configure calls that try to set a nonexistent directory. Reloading play parameters (e.g. sample program) should now work. * some win32 fixes.
author Chris Cannam
date Wed, 26 Apr 2006 16:00:13 +0000
parents f277a171749d
children c30728d5625c
rev   line source
Chris@49 1 /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */
Chris@0 2
Chris@0 3 /*
Chris@52 4 Sonic Visualiser
Chris@52 5 An audio file viewer and annotation editor.
Chris@52 6 Centre for Digital Music, Queen Mary, University of London.
Chris@0 7
Chris@52 8 This program is free software; you can redistribute it and/or
Chris@52 9 modify it under the terms of the GNU General Public License as
Chris@52 10 published by the Free Software Foundation; either version 2 of the
Chris@52 11 License, or (at your option) any later version. See the file
Chris@52 12 COPYING included with this distribution for more information.
Chris@0 13 */
Chris@0 14
Chris@0 15 /*
Chris@0 16 Based on trivial_sampler from the DSSI distribution
Chris@0 17 (by Chris Cannam, public domain).
Chris@0 18 */
Chris@0 19
Chris@0 20 #include "SamplePlayer.h"
Chris@0 21
Chris@0 22 #include <dssi.h>
Chris@0 23 #include <cmath>
Chris@0 24
Chris@0 25 #include <QMutexLocker>
Chris@0 26 #include <QDir>
Chris@0 27 #include <QFileInfo>
Chris@0 28
Chris@0 29 #include <sndfile.h>
Chris@0 30 #include <samplerate.h>
Chris@0 31 #include <iostream>
Chris@0 32
Chris@0 33 const char *const
Chris@0 34 SamplePlayer::portNames[PortCount] =
Chris@0 35 {
Chris@0 36 "Output",
Chris@0 37 "Tuned (on/off)",
Chris@0 38 "Base Pitch (MIDI)",
Chris@0 39 "Sustain (on/off)",
Chris@0 40 "Release time (s)"
Chris@0 41 };
Chris@0 42
Chris@0 43 const LADSPA_PortDescriptor
Chris@0 44 SamplePlayer::ports[PortCount] =
Chris@0 45 {
Chris@0 46 LADSPA_PORT_OUTPUT | LADSPA_PORT_AUDIO,
Chris@0 47 LADSPA_PORT_INPUT | LADSPA_PORT_CONTROL,
Chris@0 48 LADSPA_PORT_INPUT | LADSPA_PORT_CONTROL,
Chris@0 49 LADSPA_PORT_INPUT | LADSPA_PORT_CONTROL,
Chris@0 50 LADSPA_PORT_INPUT | LADSPA_PORT_CONTROL
Chris@0 51 };
Chris@0 52
Chris@0 53 const LADSPA_PortRangeHint
Chris@0 54 SamplePlayer::hints[PortCount] =
Chris@0 55 {
Chris@0 56 { 0, 0, 0 },
Chris@0 57 { LADSPA_HINT_DEFAULT_MAXIMUM | LADSPA_HINT_INTEGER |
Chris@0 58 LADSPA_HINT_BOUNDED_BELOW | LADSPA_HINT_BOUNDED_ABOVE, 0, 1 },
Chris@0 59 { LADSPA_HINT_DEFAULT_MIDDLE | LADSPA_HINT_INTEGER |
Chris@0 60 LADSPA_HINT_BOUNDED_BELOW | LADSPA_HINT_BOUNDED_ABOVE, 0, 120 },
Chris@0 61 { LADSPA_HINT_DEFAULT_MINIMUM | LADSPA_HINT_INTEGER |
Chris@0 62 LADSPA_HINT_BOUNDED_BELOW | LADSPA_HINT_BOUNDED_ABOVE, 0, 1 },
Chris@0 63 { LADSPA_HINT_DEFAULT_MINIMUM | LADSPA_HINT_LOGARITHMIC |
Chris@0 64 LADSPA_HINT_BOUNDED_BELOW | LADSPA_HINT_BOUNDED_ABOVE, 0.001, 2.0 }
Chris@0 65 };
Chris@0 66
Chris@0 67 const LADSPA_Properties
Chris@0 68 SamplePlayer::properties = LADSPA_PROPERTY_HARD_RT_CAPABLE;
Chris@0 69
Chris@0 70 const LADSPA_Descriptor
Chris@0 71 SamplePlayer::ladspaDescriptor =
Chris@0 72 {
Chris@0 73 0, // "Unique" ID
Chris@0 74 "sample_player", // Label
Chris@0 75 properties,
Chris@0 76 "Library Sample Player", // Name
Chris@0 77 "Chris Cannam", // Maker
Chris@0 78 "GPL", // Copyright
Chris@0 79 PortCount,
Chris@0 80 ports,
Chris@0 81 portNames,
Chris@0 82 hints,
Chris@0 83 0, // Implementation data
Chris@0 84 instantiate,
Chris@0 85 connectPort,
Chris@0 86 activate,
Chris@0 87 run,
Chris@0 88 0, // Run adding
Chris@0 89 0, // Set run adding gain
Chris@0 90 deactivate,
Chris@0 91 cleanup
Chris@0 92 };
Chris@0 93
Chris@0 94 const DSSI_Descriptor
Chris@0 95 SamplePlayer::dssiDescriptor =
Chris@0 96 {
Chris@0 97 2, // DSSI API version
Chris@0 98 &ladspaDescriptor,
Chris@75 99 configure,
Chris@0 100 getProgram,
Chris@0 101 selectProgram,
Chris@0 102 getMidiController,
Chris@0 103 runSynth,
Chris@0 104 0, // Run synth adding
Chris@0 105 0, // Run multiple synths
Chris@0 106 0, // Run multiple synths adding
Chris@0 107 receiveHostDescriptor
Chris@0 108 };
Chris@0 109
Chris@0 110 const DSSI_Host_Descriptor *
Chris@0 111 SamplePlayer::hostDescriptor = 0;
Chris@0 112
Chris@0 113
Chris@0 114 const DSSI_Descriptor *
Chris@0 115 SamplePlayer::getDescriptor(unsigned long index)
Chris@0 116 {
Chris@0 117 if (index == 0) return &dssiDescriptor;
Chris@0 118 return 0;
Chris@0 119 }
Chris@0 120
Chris@0 121 SamplePlayer::SamplePlayer(int sampleRate) :
Chris@0 122 m_output(0),
Chris@0 123 m_retune(0),
Chris@0 124 m_basePitch(0),
Chris@0 125 m_sustain(0),
Chris@0 126 m_release(0),
Chris@0 127 m_sampleData(0),
Chris@0 128 m_sampleCount(0),
Chris@0 129 m_sampleRate(sampleRate),
Chris@0 130 m_sampleNo(0),
Chris@83 131 m_sampleDir("samples"),
Chris@0 132 m_sampleSearchComplete(false),
Chris@0 133 m_pendingProgramChange(-1)
Chris@0 134 {
Chris@0 135 }
Chris@0 136
Chris@0 137 SamplePlayer::~SamplePlayer()
Chris@0 138 {
Chris@0 139 if (m_sampleData) free(m_sampleData);
Chris@0 140 }
Chris@0 141
Chris@0 142 LADSPA_Handle
Chris@0 143 SamplePlayer::instantiate(const LADSPA_Descriptor *, unsigned long rate)
Chris@0 144 {
Chris@0 145 if (!hostDescriptor || !hostDescriptor->request_non_rt_thread) {
Chris@0 146 std::cerr << "SamplePlayer::instantiate: Host does not provide request_non_rt_thread, not instantiating" << std::endl;
Chris@0 147 return 0;
Chris@0 148 }
Chris@0 149
Chris@0 150 SamplePlayer *player = new SamplePlayer(rate);
Chris@0 151
Chris@0 152 if (hostDescriptor->request_non_rt_thread(player, workThreadCallback)) {
Chris@0 153 std::cerr << "SamplePlayer::instantiate: Host rejected request_non_rt_thread call, not instantiating" << std::endl;
Chris@0 154 delete player;
Chris@0 155 return 0;
Chris@0 156 }
Chris@0 157
Chris@0 158 return player;
Chris@0 159 }
Chris@0 160
Chris@0 161 void
Chris@0 162 SamplePlayer::connectPort(LADSPA_Handle handle,
Chris@0 163 unsigned long port, LADSPA_Data *location)
Chris@0 164 {
Chris@0 165 SamplePlayer *player = (SamplePlayer *)handle;
Chris@0 166
Chris@0 167 float **ports[PortCount] = {
Chris@0 168 &player->m_output,
Chris@0 169 &player->m_retune,
Chris@0 170 &player->m_basePitch,
Chris@0 171 &player->m_sustain,
Chris@0 172 &player->m_release
Chris@0 173 };
Chris@0 174
Chris@0 175 *ports[port] = (float *)location;
Chris@0 176 }
Chris@0 177
Chris@0 178 void
Chris@0 179 SamplePlayer::activate(LADSPA_Handle handle)
Chris@0 180 {
Chris@0 181 SamplePlayer *player = (SamplePlayer *)handle;
Chris@0 182 QMutexLocker locker(&player->m_mutex);
Chris@0 183
Chris@0 184 player->m_sampleNo = 0;
Chris@0 185
Chris@0 186 for (size_t i = 0; i < Polyphony; ++i) {
Chris@0 187 player->m_ons[i] = -1;
Chris@0 188 player->m_offs[i] = -1;
Chris@0 189 player->m_velocities[i] = 0;
Chris@0 190 }
Chris@0 191 }
Chris@0 192
Chris@0 193 void
Chris@0 194 SamplePlayer::run(LADSPA_Handle handle, unsigned long samples)
Chris@0 195 {
Chris@0 196 runSynth(handle, samples, 0, 0);
Chris@0 197 }
Chris@0 198
Chris@0 199 void
Chris@0 200 SamplePlayer::deactivate(LADSPA_Handle handle)
Chris@0 201 {
Chris@0 202 activate(handle); // both functions just reset the plugin
Chris@0 203 }
Chris@0 204
Chris@0 205 void
Chris@0 206 SamplePlayer::cleanup(LADSPA_Handle handle)
Chris@0 207 {
Chris@0 208 delete (SamplePlayer *)handle;
Chris@0 209 }
Chris@0 210
Chris@75 211 char *
Chris@75 212 SamplePlayer::configure(LADSPA_Handle handle, const char *key, const char *value)
Chris@75 213 {
Chris@83 214 if (key && !strcmp(key, "sampledir")) {
Chris@75 215
Chris@75 216 SamplePlayer *player = (SamplePlayer *)handle;
Chris@75 217
Chris@75 218 QMutexLocker locker(&player->m_mutex);
Chris@75 219
Chris@83 220 if (QFileInfo(value).exists() &&
Chris@83 221 QFileInfo(value).isDir()) {
Chris@81 222
Chris@83 223 player->m_sampleDir = value;
Chris@81 224
Chris@83 225 if (player->m_sampleSearchComplete) {
Chris@83 226 player->m_sampleSearchComplete = false;
Chris@83 227 player->searchSamples();
Chris@83 228 }
Chris@75 229
Chris@83 230 return 0;
Chris@83 231
Chris@83 232 } else {
Chris@83 233 return strdup("Sample directory does not exist, leaving unchanged");
Chris@75 234 }
Chris@75 235 }
Chris@75 236
Chris@75 237 return strdup("Unknown configure key");
Chris@75 238 }
Chris@75 239
Chris@0 240 const DSSI_Program_Descriptor *
Chris@0 241 SamplePlayer::getProgram(LADSPA_Handle handle, unsigned long program)
Chris@0 242 {
Chris@0 243 SamplePlayer *player = (SamplePlayer *)handle;
Chris@0 244
Chris@0 245 if (!player->m_sampleSearchComplete) {
Chris@0 246 QMutexLocker locker(&player->m_mutex);
Chris@0 247 if (!player->m_sampleSearchComplete) {
Chris@0 248 player->searchSamples();
Chris@0 249 }
Chris@0 250 }
Chris@0 251 if (program >= player->m_samples.size()) return 0;
Chris@0 252
Chris@0 253 static DSSI_Program_Descriptor descriptor;
Chris@0 254 static char name[60];
Chris@0 255
Chris@0 256 strncpy(name, player->m_samples[program].first.toLocal8Bit().data(), 60);
Chris@0 257 name[59] = '\0';
Chris@0 258
Chris@0 259 descriptor.Bank = 0;
Chris@0 260 descriptor.Program = program;
Chris@0 261 descriptor.Name = name;
Chris@0 262
Chris@0 263 return &descriptor;
Chris@0 264 }
Chris@0 265
Chris@0 266 void
Chris@0 267 SamplePlayer::selectProgram(LADSPA_Handle handle,
Chris@0 268 unsigned long,
Chris@0 269 unsigned long program)
Chris@0 270 {
Chris@0 271 SamplePlayer *player = (SamplePlayer *)handle;
Chris@0 272 player->m_pendingProgramChange = program;
Chris@0 273 }
Chris@0 274
Chris@0 275 int
Chris@0 276 SamplePlayer::getMidiController(LADSPA_Handle, unsigned long port)
Chris@0 277 {
Chris@0 278 int controllers[PortCount] = {
Chris@0 279 DSSI_NONE,
Chris@0 280 DSSI_CC(12),
Chris@0 281 DSSI_CC(13),
Chris@0 282 DSSI_CC(64),
Chris@0 283 DSSI_CC(72)
Chris@0 284 };
Chris@0 285
Chris@0 286 return controllers[port];
Chris@0 287 }
Chris@0 288
Chris@0 289 void
Chris@0 290 SamplePlayer::runSynth(LADSPA_Handle handle, unsigned long samples,
Chris@0 291 snd_seq_event_t *events, unsigned long eventCount)
Chris@0 292 {
Chris@0 293 SamplePlayer *player = (SamplePlayer *)handle;
Chris@0 294
Chris@0 295 player->runImpl(samples, events, eventCount);
Chris@0 296 }
Chris@0 297
Chris@0 298 void
Chris@0 299 SamplePlayer::receiveHostDescriptor(const DSSI_Host_Descriptor *descriptor)
Chris@0 300 {
Chris@0 301 hostDescriptor = descriptor;
Chris@0 302 }
Chris@0 303
Chris@0 304 void
Chris@0 305 SamplePlayer::workThreadCallback(LADSPA_Handle handle)
Chris@0 306 {
Chris@0 307 SamplePlayer *player = (SamplePlayer *)handle;
Chris@0 308
Chris@0 309 if (player->m_pendingProgramChange >= 0) {
Chris@0 310
Chris@0 311 std::cerr << "SamplePlayer::workThreadCallback: pending program change " << player->m_pendingProgramChange << std::endl;
Chris@0 312
Chris@0 313 player->m_mutex.lock();
Chris@0 314
Chris@0 315 int program = player->m_pendingProgramChange;
Chris@0 316 player->m_pendingProgramChange = -1;
Chris@0 317
Chris@0 318 if (!player->m_sampleSearchComplete) {
Chris@0 319 player->searchSamples();
Chris@0 320 }
Chris@0 321
Chris@0 322 if (program < int(player->m_samples.size())) {
Chris@0 323 QString path = player->m_samples[program].second;
Chris@0 324 QString programName = player->m_samples[program].first;
Chris@0 325 if (programName != player->m_program) {
Chris@0 326 player->m_program = programName;
Chris@0 327 player->m_mutex.unlock();
Chris@0 328 player->loadSampleData(path);
Chris@0 329 } else {
Chris@0 330 player->m_mutex.unlock();
Chris@0 331 }
Chris@0 332 }
Chris@0 333 }
Chris@0 334
Chris@0 335 if (!player->m_sampleSearchComplete) {
Chris@0 336
Chris@0 337 QMutexLocker locker(&player->m_mutex);
Chris@0 338
Chris@0 339 if (!player->m_sampleSearchComplete) {
Chris@0 340 player->searchSamples();
Chris@0 341 }
Chris@0 342 }
Chris@0 343 }
Chris@0 344
Chris@0 345 void
Chris@0 346 SamplePlayer::searchSamples()
Chris@0 347 {
Chris@0 348 if (m_sampleSearchComplete) return;
Chris@0 349
Chris@81 350 m_samples.clear();
Chris@81 351
Chris@83 352 std::cerr << "SamplePlayer::searchSamples: Directory is \""
Chris@83 353 << m_sampleDir.toLocal8Bit().data() << "\"" << std::endl;
Chris@0 354
Chris@83 355 QDir dir(m_sampleDir, "*.wav");
Chris@83 356
Chris@83 357 for (unsigned int i = 0; i < dir.count(); ++i) {
Chris@83 358 QFileInfo file(dir.filePath(dir[i]));
Chris@83 359 if (file.isReadable()) {
Chris@83 360 m_samples.push_back(std::pair<QString, QString>
Chris@83 361 (file.baseName(), file.filePath()));
Chris@83 362 std::cerr << "Found: " << dir[i].toLocal8Bit().data() << std::endl;
Chris@75 363 }
Chris@0 364 }
Chris@83 365
Chris@0 366 m_sampleSearchComplete = true;
Chris@0 367 }
Chris@0 368
Chris@0 369 void
Chris@0 370 SamplePlayer::loadSampleData(QString path)
Chris@0 371 {
Chris@0 372 SF_INFO info;
Chris@0 373 SNDFILE *file;
Chris@0 374 size_t samples = 0;
Chris@0 375 float *tmpFrames, *tmpSamples, *tmpResamples, *tmpOld;
Chris@0 376 size_t i;
Chris@0 377
Chris@0 378 info.format = 0;
Chris@0 379 file = sf_open(path.toLocal8Bit().data(), SFM_READ, &info);
Chris@0 380 if (!file) {
Chris@0 381 std::cerr << "SamplePlayer::loadSampleData: Failed to open file "
Chris@0 382 << path.toLocal8Bit().data() << ": "
Chris@0 383 << sf_strerror(file) << std::endl;
Chris@0 384 return;
Chris@0 385 }
Chris@0 386
Chris@0 387 samples = info.frames;
Chris@0 388 tmpFrames = (float *)malloc(info.frames * info.channels * sizeof(float));
Chris@0 389 if (!tmpFrames) return;
Chris@0 390
Chris@0 391 sf_readf_float(file, tmpFrames, info.frames);
Chris@0 392 sf_close(file);
Chris@0 393
Chris@0 394 tmpResamples = 0;
Chris@0 395
Chris@0 396 if (info.samplerate != m_sampleRate) {
Chris@0 397
Chris@0 398 double ratio = (double)m_sampleRate / (double)info.samplerate;
Chris@0 399 size_t target = (size_t)(info.frames * ratio);
Chris@0 400 SRC_DATA data;
Chris@0 401
Chris@0 402 tmpResamples = (float *)malloc(target * info.channels * sizeof(float));
Chris@0 403 if (!tmpResamples) {
Chris@0 404 free(tmpFrames);
Chris@0 405 return;
Chris@0 406 }
Chris@0 407
Chris@0 408 memset(tmpResamples, 0, target * info.channels * sizeof(float));
Chris@0 409
Chris@0 410 data.data_in = tmpFrames;
Chris@0 411 data.data_out = tmpResamples;
Chris@0 412 data.input_frames = info.frames;
Chris@0 413 data.output_frames = target;
Chris@0 414 data.src_ratio = ratio;
Chris@0 415
Chris@0 416 if (!src_simple(&data, SRC_SINC_BEST_QUALITY, info.channels)) {
Chris@0 417 free(tmpFrames);
Chris@0 418 tmpFrames = tmpResamples;
Chris@0 419 samples = target;
Chris@0 420 } else {
Chris@0 421 free(tmpResamples);
Chris@0 422 }
Chris@0 423 }
Chris@0 424
Chris@0 425 /* add an extra sample for linear interpolation */
Chris@0 426 tmpSamples = (float *)malloc((samples + 1) * sizeof(float));
Chris@0 427 if (!tmpSamples) {
Chris@0 428 free(tmpFrames);
Chris@0 429 return;
Chris@0 430 }
Chris@0 431
Chris@0 432 for (i = 0; i < samples; ++i) {
Chris@0 433 int j;
Chris@0 434 tmpSamples[i] = 0.0f;
Chris@0 435 for (j = 0; j < info.channels; ++j) {
Chris@0 436 tmpSamples[i] += tmpFrames[i * info.channels + j];
Chris@0 437 }
Chris@0 438 }
Chris@0 439
Chris@0 440 free(tmpFrames);
Chris@0 441
Chris@0 442 /* add an extra sample for linear interpolation */
Chris@0 443 tmpSamples[samples] = 0.0f;
Chris@0 444
Chris@0 445 QMutexLocker locker(&m_mutex);
Chris@0 446
Chris@0 447 tmpOld = m_sampleData;
Chris@0 448 m_sampleData = tmpSamples;
Chris@0 449 m_sampleCount = samples;
Chris@0 450
Chris@0 451 for (i = 0; i < Polyphony; ++i) {
Chris@0 452 m_ons[i] = -1;
Chris@0 453 m_offs[i] = -1;
Chris@0 454 m_velocities[i] = 0;
Chris@0 455 }
Chris@0 456
Chris@0 457 if (tmpOld) free(tmpOld);
Chris@0 458
Chris@0 459 printf("%s: loaded %s (%ld samples from original %ld channels resampled from %ld frames at %ld Hz)\n", "sampler", path.toLocal8Bit().data(), (long)samples, (long)info.channels, (long)info.frames, (long)info.samplerate);
Chris@0 460 }
Chris@0 461
Chris@0 462 void
Chris@0 463 SamplePlayer::runImpl(unsigned long sampleCount,
Chris@0 464 snd_seq_event_t *events,
Chris@0 465 unsigned long eventCount)
Chris@0 466 {
Chris@0 467 unsigned long pos;
Chris@0 468 unsigned long count;
Chris@0 469 unsigned long event_pos;
Chris@0 470 int i;
Chris@0 471
Chris@0 472 memset(m_output, 0, sampleCount * sizeof(float));
Chris@0 473
Chris@0 474 if (!m_mutex.tryLock()) return;
Chris@0 475
Chris@0 476 if (!m_sampleData || !m_sampleCount) {
Chris@0 477 m_sampleNo += sampleCount;
Chris@0 478 m_mutex.unlock();
Chris@0 479 return;
Chris@0 480 }
Chris@0 481
Chris@0 482 for (pos = 0, event_pos = 0; pos < sampleCount; ) {
Chris@0 483
Chris@0 484 while (event_pos < eventCount
Chris@0 485 && pos >= events[event_pos].time.tick) {
Chris@0 486
Chris@0 487 if (events[event_pos].type == SND_SEQ_EVENT_NOTEON) {
Chris@0 488 snd_seq_ev_note_t n = events[event_pos].data.note;
Chris@0 489 if (n.velocity > 0) {
Chris@0 490 m_ons[n.note] =
Chris@0 491 m_sampleNo + events[event_pos].time.tick;
Chris@0 492 m_offs[n.note] = -1;
Chris@0 493 m_velocities[n.note] = n.velocity;
Chris@0 494 } else {
Chris@0 495 if (!m_sustain || (*m_sustain < 0.001)) {
Chris@0 496 m_offs[n.note] =
Chris@0 497 m_sampleNo + events[event_pos].time.tick;
Chris@0 498 }
Chris@0 499 }
Chris@0 500 } else if (events[event_pos].type == SND_SEQ_EVENT_NOTEOFF &&
Chris@0 501 (!m_sustain || (*m_sustain < 0.001))) {
Chris@0 502 snd_seq_ev_note_t n = events[event_pos].data.note;
Chris@0 503 m_offs[n.note] =
Chris@0 504 m_sampleNo + events[event_pos].time.tick;
Chris@0 505 }
Chris@0 506
Chris@0 507 ++event_pos;
Chris@0 508 }
Chris@0 509
Chris@0 510 count = sampleCount - pos;
Chris@0 511 if (event_pos < eventCount &&
Chris@0 512 events[event_pos].time.tick < sampleCount) {
Chris@0 513 count = events[event_pos].time.tick - pos;
Chris@0 514 }
Chris@0 515
Chris@0 516 for (i = 0; i < Polyphony; ++i) {
Chris@0 517 if (m_ons[i] >= 0) {
Chris@0 518 addSample(i, pos, count);
Chris@0 519 }
Chris@0 520 }
Chris@0 521
Chris@0 522 pos += count;
Chris@0 523 }
Chris@0 524
Chris@0 525 m_sampleNo += sampleCount;
Chris@0 526 m_mutex.unlock();
Chris@0 527 }
Chris@0 528
Chris@0 529 void
Chris@0 530 SamplePlayer::addSample(int n, unsigned long pos, unsigned long count)
Chris@0 531 {
Chris@0 532 float ratio = 1.0;
Chris@0 533 float gain = 1.0;
Chris@0 534 unsigned long i, s;
Chris@0 535
Chris@0 536 if (m_retune && *m_retune) {
Chris@0 537 if (m_basePitch && n != *m_basePitch) {
Chris@0 538 ratio = powf(1.059463094, n - *m_basePitch);
Chris@0 539 }
Chris@0 540 }
Chris@0 541
Chris@0 542 if (long(pos + m_sampleNo) < m_ons[n]) return;
Chris@0 543
Chris@0 544 gain = (float)m_velocities[n] / 127.0f;
Chris@0 545
Chris@0 546 for (i = 0, s = pos + m_sampleNo - m_ons[n];
Chris@0 547 i < count;
Chris@0 548 ++i, ++s) {
Chris@0 549
Chris@0 550 float lgain = gain;
Chris@0 551 float rs = s * ratio;
Chris@0 552 unsigned long rsi = lrintf(floor(rs));
Chris@0 553
Chris@0 554 if (rsi >= m_sampleCount) {
Chris@0 555 m_ons[n] = -1;
Chris@0 556 break;
Chris@0 557 }
Chris@0 558
Chris@0 559 if (m_offs[n] >= 0 &&
Chris@0 560 long(pos + i + m_sampleNo) > m_offs[n]) {
Chris@0 561
Chris@0 562 unsigned long dist =
Chris@0 563 pos + i + m_sampleNo - m_offs[n];
Chris@0 564
Chris@0 565 unsigned long releaseFrames = 200;
Chris@0 566 if (m_release) {
Chris@0 567 releaseFrames = long(*m_release * m_sampleRate + 0.0001);
Chris@0 568 }
Chris@0 569
Chris@0 570 if (dist > releaseFrames) {
Chris@0 571 m_ons[n] = -1;
Chris@0 572 break;
Chris@0 573 } else {
Chris@0 574 lgain = lgain * (float)(releaseFrames - dist) /
Chris@0 575 (float)releaseFrames;
Chris@0 576 }
Chris@0 577 }
Chris@0 578
Chris@0 579 float sample = m_sampleData[rsi] +
Chris@0 580 ((m_sampleData[rsi + 1] -
Chris@0 581 m_sampleData[rsi]) *
Chris@0 582 (rs - (float)rsi));
Chris@0 583
Chris@0 584 m_output[pos + i] += lgain * sample;
Chris@0 585 }
Chris@0 586 }