/[svn]/linuxsampler/trunk/src/engines/gig/Engine.cpp
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Annotation of /linuxsampler/trunk/src/engines/gig/Engine.cpp

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Revision 438 - (hide annotations) (download)
Wed Mar 9 22:12:15 2005 UTC (14 years, 7 months ago) by persson
File size: 48019 byte(s)
* 24-bit decompression now supports the 20 and 18 bit formats
* support for "random" and "round robin" dimensions
* removed a warning printout for empty samples during instrument
  loading

1 schoenebeck 53 /***************************************************************************
2     * *
3     * LinuxSampler - modular, streaming capable sampler *
4     * *
5 schoenebeck 56 * Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck *
6 schoenebeck 411 * Copyright (C) 2005 Christian Schoenebeck *
7 schoenebeck 53 * *
8     * This program is free software; you can redistribute it and/or modify *
9     * it under the terms of the GNU General Public License as published by *
10     * the Free Software Foundation; either version 2 of the License, or *
11     * (at your option) any later version. *
12     * *
13     * This program is distributed in the hope that it will be useful, *
14     * but WITHOUT ANY WARRANTY; without even the implied warranty of *
15     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
16     * GNU General Public License for more details. *
17     * *
18     * You should have received a copy of the GNU General Public License *
19     * along with this program; if not, write to the Free Software *
20     * Foundation, Inc., 59 Temple Place, Suite 330, Boston, *
21     * MA 02111-1307 USA *
22     ***************************************************************************/
23    
24     #include <sstream>
25     #include "DiskThread.h"
26     #include "Voice.h"
27 schoenebeck 285 #include "EGADSR.h"
28 schoenebeck 420 #include "../EngineFactory.h"
29 schoenebeck 53
30     #include "Engine.h"
31    
32 schoenebeck 361 #if defined(__APPLE__)
33     # include <stdlib.h>
34     #else
35     # include <malloc.h>
36     #endif
37    
38 schoenebeck 53 namespace LinuxSampler { namespace gig {
39    
40 schoenebeck 411 InstrumentResourceManager Engine::instruments;
41 schoenebeck 53
42 schoenebeck 411 std::map<AudioOutputDevice*,Engine*> Engine::engines;
43    
44 schoenebeck 412 /**
45     * Get a gig::Engine object for the given gig::EngineChannel and the
46     * given AudioOutputDevice. All engine channels which are connected to
47     * the same audio output device will use the same engine instance. This
48     * method will be called by a gig::EngineChannel whenever it's
49     * connecting to a audio output device.
50     *
51     * @param pChannel - engine channel which acquires an engine object
52     * @param pDevice - the audio output device \a pChannel is connected to
53     */
54 schoenebeck 411 Engine* Engine::AcquireEngine(LinuxSampler::gig::EngineChannel* pChannel, AudioOutputDevice* pDevice) {
55 schoenebeck 412 Engine* pEngine = NULL;
56     // check if there's already an engine for the given audio output device
57 schoenebeck 411 if (engines.count(pDevice)) {
58 schoenebeck 412 dmsg(4,("Using existing gig::Engine.\n"));
59 persson 438 pEngine = engines[pDevice];
60 schoenebeck 412 } else { // create a new engine (and disk thread) instance for the given audio output device
61     dmsg(4,("Creating new gig::Engine.\n"));
62 schoenebeck 420 pEngine = (Engine*) EngineFactory::Create("gig");
63 schoenebeck 411 pEngine->Connect(pDevice);
64 persson 438 engines[pDevice] = pEngine;
65 schoenebeck 411 }
66 schoenebeck 412 // register engine channel to the engine instance
67     pEngine->engineChannels.push_back(pChannel);
68     dmsg(4,("This gig::Engine has now %d EngineChannels.\n",pEngine->engineChannels.size()));
69 schoenebeck 411 return pEngine;
70     }
71    
72 schoenebeck 412 /**
73     * Once an engine channel is disconnected from an audio output device,
74     * it wil immediately call this method to unregister itself from the
75     * engine instance and if that engine instance is not used by any other
76     * engine channel anymore, then that engine instance will be destroyed.
77     *
78     * @param pChannel - engine channel which wants to disconnect from it's
79     * engine instance
80     * @param pDevice - audio output device \a pChannel was connected to
81     */
82 schoenebeck 411 void Engine::FreeEngine(LinuxSampler::gig::EngineChannel* pChannel, AudioOutputDevice* pDevice) {
83 schoenebeck 412 dmsg(4,("Disconnecting EngineChannel from gig::Engine.\n"));
84 schoenebeck 411 Engine* pEngine = engines[pDevice];
85 schoenebeck 412 // unregister EngineChannel from the Engine instance
86     pEngine->engineChannels.remove(pChannel);
87     // if the used Engine instance is not used anymore, then destroy it
88     if (pEngine->engineChannels.empty()) {
89     pDevice->Disconnect(pEngine);
90     engines.erase(pDevice);
91     delete pEngine;
92     dmsg(4,("Destroying gig::Engine.\n"));
93     }
94     else dmsg(4,("This gig::Engine has now %d EngineChannels.\n",pEngine->engineChannels.size()));
95 schoenebeck 411 }
96    
97 schoenebeck 53 Engine::Engine() {
98     pAudioOutputDevice = NULL;
99     pDiskThread = NULL;
100     pEventGenerator = NULL;
101 schoenebeck 244 pSysexBuffer = new RingBuffer<uint8_t>(SYSEX_BUFFER_SIZE, 0);
102     pEventQueue = new RingBuffer<Event>(MAX_EVENTS_PER_FRAGMENT, 0);
103 schoenebeck 271 pEventPool = new Pool<Event>(MAX_EVENTS_PER_FRAGMENT);
104 persson 438 pVoicePool = new Pool<Voice>(MAX_AUDIO_VOICES);
105 schoenebeck 271 pVoiceStealingQueue = new RTList<Event>(pEventPool);
106     pEvents = new RTList<Event>(pEventPool);
107     pCCEvents = new RTList<Event>(pEventPool);
108 persson 438
109 schoenebeck 53 for (uint i = 0; i < Event::destination_count; i++) {
110 schoenebeck 271 pSynthesisEvents[i] = new RTList<Event>(pEventPool);
111 schoenebeck 53 }
112 schoenebeck 271 for (RTList<Voice>::Iterator iterVoice = pVoicePool->allocAppend(); iterVoice == pVoicePool->last(); iterVoice = pVoicePool->allocAppend()) {
113     iterVoice->SetEngine(this);
114 schoenebeck 53 }
115     pVoicePool->clear();
116    
117     pSynthesisParameters[0] = NULL; // we allocate when an audio device is connected
118 schoenebeck 80 pBasicFilterParameters = NULL;
119     pMainFilterParameters = NULL;
120 schoenebeck 123
121 schoenebeck 53 ResetInternal();
122     }
123    
124     Engine::~Engine() {
125     if (pDiskThread) {
126 senkov 329 dmsg(1,("Stopping disk thread..."));
127 schoenebeck 53 pDiskThread->StopThread();
128     delete pDiskThread;
129 senkov 329 dmsg(1,("OK\n"));
130 schoenebeck 53 }
131     for (uint i = 0; i < Event::destination_count; i++) {
132     if (pSynthesisEvents[i]) delete pSynthesisEvents[i];
133     }
134     if (pEvents) delete pEvents;
135     if (pCCEvents) delete pCCEvents;
136     if (pEventQueue) delete pEventQueue;
137     if (pEventPool) delete pEventPool;
138 schoenebeck 411 if (pVoicePool) {
139     pVoicePool->clear();
140     delete pVoicePool;
141     }
142 schoenebeck 53 if (pEventGenerator) delete pEventGenerator;
143 schoenebeck 80 if (pMainFilterParameters) delete[] pMainFilterParameters;
144     if (pBasicFilterParameters) delete[] pBasicFilterParameters;
145 schoenebeck 319 if (pSynthesisParameters[0]) free(pSynthesisParameters[0]);
146 schoenebeck 250 if (pVoiceStealingQueue) delete pVoiceStealingQueue;
147 schoenebeck 411 if (pSysexBuffer) delete pSysexBuffer;
148 schoenebeck 420 EngineFactory::Destroy(this);
149 schoenebeck 53 }
150    
151     void Engine::Enable() {
152     dmsg(3,("gig::Engine: enabling\n"));
153     EngineDisabled.PushAndUnlock(false, 2); // set condition object 'EngineDisabled' to false (wait max. 2s)
154 schoenebeck 64 dmsg(3,("gig::Engine: enabled (val=%d)\n", EngineDisabled.GetUnsafe()));
155 schoenebeck 53 }
156    
157     void Engine::Disable() {
158     dmsg(3,("gig::Engine: disabling\n"));
159     bool* pWasDisabled = EngineDisabled.PushAndUnlock(true, 2); // wait max. 2s
160     if (!pWasDisabled) dmsg(3,("gig::Engine warning: Timeout waiting to disable engine.\n"));
161     }
162    
163     void Engine::DisableAndLock() {
164     dmsg(3,("gig::Engine: disabling\n"));
165     bool* pWasDisabled = EngineDisabled.Push(true, 2); // wait max. 2s
166     if (!pWasDisabled) dmsg(3,("gig::Engine warning: Timeout waiting to disable engine.\n"));
167     }
168    
169     /**
170     * Reset all voices and disk thread and clear input event queue and all
171     * control and status variables.
172     */
173     void Engine::Reset() {
174     DisableAndLock();
175     ResetInternal();
176     Enable();
177     }
178    
179     /**
180     * Reset all voices and disk thread and clear input event queue and all
181     * control and status variables. This method is not thread safe!
182     */
183     void Engine::ResetInternal() {
184     ActiveVoiceCount = 0;
185     ActiveVoiceCountMax = 0;
186    
187 schoenebeck 250 // reset voice stealing parameters
188     pVoiceStealingQueue->clear();
189    
190 schoenebeck 244 // reset to normal chromatic scale (means equal temper)
191     memset(&ScaleTuning[0], 0x00, 12);
192    
193 schoenebeck 53 // reset all voices
194 schoenebeck 271 for (RTList<Voice>::Iterator iterVoice = pVoicePool->allocAppend(); iterVoice == pVoicePool->last(); iterVoice = pVoicePool->allocAppend()) {
195     iterVoice->Reset();
196 schoenebeck 53 }
197     pVoicePool->clear();
198    
199     // reset disk thread
200     if (pDiskThread) pDiskThread->Reset();
201    
202     // delete all input events
203     pEventQueue->init();
204 persson 438 }
205 schoenebeck 53
206     void Engine::Connect(AudioOutputDevice* pAudioOut) {
207     pAudioOutputDevice = pAudioOut;
208    
209     ResetInternal();
210    
211     // inform audio driver for the need of two channels
212     try {
213     pAudioOutputDevice->AcquireChannels(2); // gig engine only stereo
214     }
215     catch (AudioOutputException e) {
216     String msg = "Audio output device unable to provide 2 audio channels, cause: " + e.Message();
217     throw LinuxSamplerException(msg);
218     }
219 persson 438
220 schoenebeck 225 this->MaxSamplesPerCycle = pAudioOutputDevice->MaxSamplesPerCycle();
221     this->SampleRate = pAudioOutputDevice->SampleRate();
222    
223 schoenebeck 285 // FIXME: audio drivers with varying fragment sizes might be a problem here
224     MaxFadeOutPos = MaxSamplesPerCycle - int(double(SampleRate) * EG_MIN_RELEASE_TIME) - 1;
225     if (MaxFadeOutPos < 0)
226 schoenebeck 411 throw LinuxSamplerException("EG_MIN_RELEASE_TIME in EGADSR.h too big for current audio fragment size / sampling rate!");
227 schoenebeck 285
228 schoenebeck 53 // (re)create disk thread
229     if (this->pDiskThread) {
230 senkov 329 dmsg(1,("Stopping disk thread..."));
231 schoenebeck 53 this->pDiskThread->StopThread();
232     delete this->pDiskThread;
233 senkov 329 dmsg(1,("OK\n"));
234 schoenebeck 53 }
235     this->pDiskThread = new DiskThread(((pAudioOut->MaxSamplesPerCycle() << MAX_PITCH) << 1) + 6); //FIXME: assuming stereo
236     if (!pDiskThread) {
237     dmsg(0,("gig::Engine new diskthread = NULL\n"));
238     exit(EXIT_FAILURE);
239     }
240    
241 schoenebeck 271 for (RTList<Voice>::Iterator iterVoice = pVoicePool->allocAppend(); iterVoice == pVoicePool->last(); iterVoice = pVoicePool->allocAppend()) {
242     iterVoice->pDiskThread = this->pDiskThread;
243 schoenebeck 53 dmsg(3,("d"));
244     }
245     pVoicePool->clear();
246    
247     // (re)create event generator
248     if (pEventGenerator) delete pEventGenerator;
249     pEventGenerator = new EventGenerator(pAudioOut->SampleRate());
250    
251     // (re)allocate synthesis parameter matrix
252 schoenebeck 319 if (pSynthesisParameters[0]) free(pSynthesisParameters[0]);
253 schoenebeck 361
254     #if defined(__APPLE__)
255     pSynthesisParameters[0] = (float *) malloc(Event::destination_count * sizeof(float) * pAudioOut->MaxSamplesPerCycle());
256     #else
257 schoenebeck 319 pSynthesisParameters[0] = (float *) memalign(16,(Event::destination_count * sizeof(float) * pAudioOut->MaxSamplesPerCycle()));
258 schoenebeck 361 #endif
259 schoenebeck 53 for (int dst = 1; dst < Event::destination_count; dst++)
260     pSynthesisParameters[dst] = pSynthesisParameters[dst - 1] + pAudioOut->MaxSamplesPerCycle();
261    
262 schoenebeck 80 // (re)allocate biquad filter parameter sequence
263     if (pBasicFilterParameters) delete[] pBasicFilterParameters;
264     if (pMainFilterParameters) delete[] pMainFilterParameters;
265     pBasicFilterParameters = new biquad_param_t[pAudioOut->MaxSamplesPerCycle()];
266     pMainFilterParameters = new biquad_param_t[pAudioOut->MaxSamplesPerCycle()];
267    
268 schoenebeck 53 dmsg(1,("Starting disk thread..."));
269     pDiskThread->StartThread();
270     dmsg(1,("OK\n"));
271    
272 schoenebeck 271 for (RTList<Voice>::Iterator iterVoice = pVoicePool->allocAppend(); iterVoice == pVoicePool->last(); iterVoice = pVoicePool->allocAppend()) {
273     if (!iterVoice->pDiskThread) {
274 schoenebeck 53 dmsg(0,("Engine -> voice::trigger: !pDiskThread\n"));
275     exit(EXIT_FAILURE);
276     }
277     }
278     }
279    
280 schoenebeck 412 void Engine::ClearEventLists() {
281     pEvents->clear();
282     pCCEvents->clear();
283     for (uint i = 0; i < Event::destination_count; i++) {
284     pSynthesisEvents[i]->clear();
285     }
286     }
287    
288 schoenebeck 53 /**
289 schoenebeck 412 * Copy all events from the given input queue buffer to the engine's
290     * internal event list. This will be done at the beginning of each audio
291     * cycle (that is each RenderAudio() call) to get all events which have
292     * to be processed in the current audio cycle. Each EngineChannel has
293     * it's own input event queue for the common channel specific events
294     * (like NoteOn, NoteOff and ControlChange events). Beside that, the
295     * engine also has a input event queue for global events (usually SysEx
296     * message).
297     *
298     * @param pEventQueue - input event buffer to read from
299     * @param Samples - number of sample points to be processed in the
300     * current audio cycle
301     */
302     void Engine::ImportEvents(RingBuffer<Event>* pEventQueue, uint Samples) {
303     RingBuffer<Event>::NonVolatileReader eventQueueReader = pEventQueue->get_non_volatile_reader();
304     Event* pEvent;
305     while (true) {
306     // get next event from input event queue
307     if (!(pEvent = eventQueueReader.pop())) break;
308     // if younger event reached, ignore that and all subsequent ones for now
309     if (pEvent->FragmentPos() >= Samples) {
310     eventQueueReader--;
311     dmsg(2,("Younger Event, pos=%d ,Samples=%d!\n",pEvent->FragmentPos(),Samples));
312     pEvent->ResetFragmentPos();
313     break;
314     }
315     // copy event to internal event list
316     if (pEvents->poolIsEmpty()) {
317     dmsg(1,("Event pool emtpy!\n"));
318     break;
319     }
320     *pEvents->allocAppend() = *pEvent;
321     }
322     eventQueueReader.free(); // free all copied events from input queue
323 persson 438 }
324 schoenebeck 412
325     /**
326 schoenebeck 53 * Let this engine proceed to render the given amount of sample points. The
327     * calculated audio data of all voices of this engine will be placed into
328     * the engine's audio sum buffer which has to be copied and eventually be
329     * converted to the appropriate value range by the audio output class (e.g.
330     * AlsaIO or JackIO) right after.
331     *
332     * @param Samples - number of sample points to be rendered
333     * @returns 0 on success
334     */
335 schoenebeck 412 int Engine::RenderAudio(uint Samples) {
336 schoenebeck 53 dmsg(5,("RenderAudio(Samples=%d)\n", Samples));
337    
338 schoenebeck 412 // return if engine disabled
339 schoenebeck 53 if (EngineDisabled.Pop()) {
340     dmsg(5,("gig::Engine: engine disabled (val=%d)\n",EngineDisabled.GetUnsafe()));
341     return 0;
342     }
343    
344 schoenebeck 293 // update time of start and end of this audio fragment (as events' time stamps relate to this)
345     pEventGenerator->UpdateFragmentTime(Samples);
346    
347 schoenebeck 412 // empty the engine's event lists for the new fragment
348     ClearEventLists();
349 schoenebeck 293
350 schoenebeck 412 // get all events from the engine's global input event queue which belong to the current fragment
351     // (these are usually just SysEx messages)
352     ImportEvents(this->pEventQueue, Samples);
353    
354     // process engine global events (these are currently only MIDI System Exclusive messages)
355     {
356     RTList<Event>::Iterator itEvent = pEvents->first();
357     RTList<Event>::Iterator end = pEvents->end();
358     for (; itEvent != end; ++itEvent) {
359     switch (itEvent->Type) {
360     case Event::type_sysex:
361     dmsg(5,("Engine: Sysex received\n"));
362     ProcessSysex(itEvent);
363     break;
364     }
365     }
366 schoenebeck 53 }
367 schoenebeck 412
368     // reset internal voice counter (just for statistic of active voices)
369     ActiveVoiceCountTemp = 0;
370    
371     // render audio for all engine channels
372     // TODO: should we make voice stealing engine globally? unfortunately this would mean other disadvantages so I left voice stealing in the engine channel space for now
373 schoenebeck 271 {
374 schoenebeck 412 std::list<EngineChannel*>::iterator itChannel = engineChannels.begin();
375     std::list<EngineChannel*>::iterator end = engineChannels.end();
376     for (; itChannel != end; itChannel++) {
377     if (!(*itChannel)->pInstrument) continue; // ignore if no instrument loaded
378     RenderAudio(*itChannel, Samples);
379     }
380     }
381    
382     // just some statistics about this engine instance
383     ActiveVoiceCount = ActiveVoiceCountTemp;
384     if (ActiveVoiceCount > ActiveVoiceCountMax) ActiveVoiceCountMax = ActiveVoiceCount;
385    
386     return 0;
387     }
388    
389     void Engine::RenderAudio(EngineChannel* pEngineChannel, uint Samples) {
390     // empty the engine's event lists for the new fragment
391     ClearEventLists();
392     // empty the engine channel's, MIDI key specific event lists
393     {
394 schoenebeck 411 RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();
395     RTList<uint>::Iterator end = pEngineChannel->pActiveKeys->end();
396 schoenebeck 271 for(; iuiKey != end; ++iuiKey) {
397 schoenebeck 411 pEngineChannel->pMIDIKeyInfo[*iuiKey].pEvents->clear(); // free all events on the key
398 schoenebeck 271 }
399 schoenebeck 250 }
400 schoenebeck 53
401 schoenebeck 293
402 schoenebeck 412 // get all events from the engine channels's input event queue which belong to the current fragment
403     // (these are the common events like NoteOn, NoteOff, ControlChange, etc.)
404 persson 438 ImportEvents(pEngineChannel->pEventQueue, Samples);
405 schoenebeck 53
406    
407     // process events
408 schoenebeck 271 {
409     RTList<Event>::Iterator itEvent = pEvents->first();
410     RTList<Event>::Iterator end = pEvents->end();
411     for (; itEvent != end; ++itEvent) {
412     switch (itEvent->Type) {
413     case Event::type_note_on:
414     dmsg(5,("Engine: Note on received\n"));
415 schoenebeck 412 ProcessNoteOn((EngineChannel*)itEvent->pEngineChannel, itEvent);
416 schoenebeck 271 break;
417     case Event::type_note_off:
418     dmsg(5,("Engine: Note off received\n"));
419 schoenebeck 412 ProcessNoteOff((EngineChannel*)itEvent->pEngineChannel, itEvent);
420 schoenebeck 271 break;
421     case Event::type_control_change:
422     dmsg(5,("Engine: MIDI CC received\n"));
423 schoenebeck 412 ProcessControlChange((EngineChannel*)itEvent->pEngineChannel, itEvent);
424 schoenebeck 271 break;
425     case Event::type_pitchbend:
426     dmsg(5,("Engine: Pitchbend received\n"));
427 schoenebeck 412 ProcessPitchbend((EngineChannel*)itEvent->pEngineChannel, itEvent);
428 schoenebeck 271 break;
429     }
430 schoenebeck 53 }
431     }
432    
433    
434 schoenebeck 271 // render audio from all active voices
435     {
436 schoenebeck 411 RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();
437     RTList<uint>::Iterator end = pEngineChannel->pActiveKeys->end();
438 schoenebeck 271 while (iuiKey != end) { // iterate through all active keys
439 schoenebeck 411 midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];
440 schoenebeck 271 ++iuiKey;
441 schoenebeck 53
442 schoenebeck 271 RTList<Voice>::Iterator itVoice = pKey->pActiveVoices->first();
443     RTList<Voice>::Iterator itVoicesEnd = pKey->pActiveVoices->end();
444     for (; itVoice != itVoicesEnd; ++itVoice) { // iterate through all voices on this key
445     // now render current voice
446     itVoice->Render(Samples);
447 schoenebeck 412 if (itVoice->IsActive()) ActiveVoiceCountTemp++; // still active
448 schoenebeck 271 else { // voice reached end, is now inactive
449 schoenebeck 411 FreeVoice(pEngineChannel, itVoice); // remove voice from the list of active voices
450 schoenebeck 271 }
451 schoenebeck 53 }
452     }
453     }
454    
455 persson 438
456 schoenebeck 250 // now render all postponed voices from voice stealing
457 schoenebeck 271 {
458     RTList<Event>::Iterator itVoiceStealEvent = pVoiceStealingQueue->first();
459     RTList<Event>::Iterator end = pVoiceStealingQueue->end();
460     for (; itVoiceStealEvent != end; ++itVoiceStealEvent) {
461 schoenebeck 411 Pool<Voice>::Iterator itNewVoice =
462     LaunchVoice(pEngineChannel, itVoiceStealEvent, itVoiceStealEvent->Param.Note.Layer, itVoiceStealEvent->Param.Note.ReleaseTrigger, false);
463 schoenebeck 271 if (itNewVoice) {
464 schoenebeck 285 for (; itNewVoice; itNewVoice = itNewVoice->itChildVoice) {
465     itNewVoice->Render(Samples);
466 schoenebeck 412 if (itNewVoice->IsActive()) ActiveVoiceCountTemp++; // still active
467 schoenebeck 285 else { // voice reached end, is now inactive
468 schoenebeck 411 FreeVoice(pEngineChannel, itNewVoice); // remove voice from the list of active voices
469 schoenebeck 285 }
470 schoenebeck 271 }
471 schoenebeck 250 }
472 schoenebeck 287 else dmsg(1,("gig::Engine: ERROR, voice stealing didn't work out!\n"));
473 schoenebeck 250 }
474     }
475     // reset voice stealing for the new fragment
476     pVoiceStealingQueue->clear();
477 schoenebeck 412 pEngineChannel->itLastStolenVoice = RTList<Voice>::Iterator();
478     pEngineChannel->iuiLastStolenKey = RTList<uint>::Iterator();
479 schoenebeck 250
480 persson 438
481 schoenebeck 287 // free all keys which have no active voices left
482     {
483 schoenebeck 411 RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();
484     RTList<uint>::Iterator end = pEngineChannel->pActiveKeys->end();
485 schoenebeck 287 while (iuiKey != end) { // iterate through all active keys
486 schoenebeck 411 midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];
487 schoenebeck 287 ++iuiKey;
488 schoenebeck 411 if (pKey->pActiveVoices->isEmpty()) FreeKey(pEngineChannel, pKey);
489 schoenebeck 287 #if DEVMODE
490     else { // FIXME: should be removed before the final release (purpose: just a sanity check for debugging)
491     RTList<Voice>::Iterator itVoice = pKey->pActiveVoices->first();
492     RTList<Voice>::Iterator itVoicesEnd = pKey->pActiveVoices->end();
493     for (; itVoice != itVoicesEnd; ++itVoice) { // iterate through all voices on this key
494     if (itVoice->itKillEvent) {
495     dmsg(1,("gig::Engine: ERROR, killed voice survived !!!\n"));
496     }
497     }
498     }
499     #endif // DEVMODE
500     }
501     }
502 schoenebeck 412 }
503 schoenebeck 287
504 schoenebeck 53 /**
505 schoenebeck 244 * Will be called by the MIDI input device whenever a MIDI system
506     * exclusive message has arrived.
507     *
508     * @param pData - pointer to sysex data
509     * @param Size - lenght of sysex data (in bytes)
510     */
511     void Engine::SendSysex(void* pData, uint Size) {
512 schoenebeck 246 Event event = pEventGenerator->CreateEvent();
513     event.Type = Event::type_sysex;
514     event.Param.Sysex.Size = Size;
515 schoenebeck 412 event.pEngineChannel = NULL; // as Engine global event
516 schoenebeck 244 if (pEventQueue->write_space() > 0) {
517     if (pSysexBuffer->write_space() >= Size) {
518     // copy sysex data to input buffer
519     uint toWrite = Size;
520     uint8_t* pPos = (uint8_t*) pData;
521     while (toWrite) {
522     const uint writeNow = RTMath::Min(toWrite, pSysexBuffer->write_space_to_end());
523     pSysexBuffer->write(pPos, writeNow);
524     toWrite -= writeNow;
525     pPos += writeNow;
526    
527     }
528     // finally place sysex event into input event queue
529     pEventQueue->push(&event);
530     }
531     else dmsg(1,("Engine: Sysex message too large (%d byte) for input buffer (%d byte)!",Size,SYSEX_BUFFER_SIZE));
532     }
533     else dmsg(1,("Engine: Input event queue full!"));
534     }
535    
536     /**
537 schoenebeck 53 * Assigns and triggers a new voice for the respective MIDI key.
538     *
539 schoenebeck 411 * @param pEngineChannel - engine channel on which this event occured on
540 schoenebeck 271 * @param itNoteOnEvent - key, velocity and time stamp of the event
541 schoenebeck 53 */
542 schoenebeck 411 void Engine::ProcessNoteOn(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOnEvent) {
543 persson 438
544 schoenebeck 354 const int key = itNoteOnEvent->Param.Note.Key;
545    
546     // Change key dimension value if key is in keyswitching area
547 schoenebeck 411 {
548     const ::gig::Instrument* pInstrument = pEngineChannel->pInstrument;
549     if (key >= pInstrument->DimensionKeyRange.low && key <= pInstrument->DimensionKeyRange.high)
550     pEngineChannel->CurrentKeyDimension = ((key - pInstrument->DimensionKeyRange.low) * 128) /
551     (pInstrument->DimensionKeyRange.high - pInstrument->DimensionKeyRange.low + 1);
552     }
553 schoenebeck 354
554 schoenebeck 411 midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[key];
555 schoenebeck 354
556 schoenebeck 53 pKey->KeyPressed = true; // the MIDI key was now pressed down
557    
558     // cancel release process of voices on this key if needed
559 schoenebeck 411 if (pKey->Active && !pEngineChannel->SustainPedal) {
560 schoenebeck 271 RTList<Event>::Iterator itCancelReleaseEvent = pKey->pEvents->allocAppend();
561     if (itCancelReleaseEvent) {
562     *itCancelReleaseEvent = *itNoteOnEvent; // copy event
563     itCancelReleaseEvent->Type = Event::type_cancel_release; // transform event type
564 schoenebeck 239 }
565     else dmsg(1,("Event pool emtpy!\n"));
566 schoenebeck 53 }
567    
568 schoenebeck 271 // move note on event to the key's own event list
569     RTList<Event>::Iterator itNoteOnEventOnKeyList = itNoteOnEvent.moveToEndOf(pKey->pEvents);
570    
571 schoenebeck 233 // allocate and trigger a new voice for the key
572 schoenebeck 411 LaunchVoice(pEngineChannel, itNoteOnEventOnKeyList, 0, false, true);
573 persson 438
574     pKey->RoundRobinIndex++;
575 schoenebeck 53 }
576    
577     /**
578     * Releases the voices on the given key if sustain pedal is not pressed.
579     * If sustain is pressed, the release of the note will be postponed until
580     * sustain pedal will be released or voice turned inactive by itself (e.g.
581     * due to completion of sample playback).
582     *
583 schoenebeck 411 * @param pEngineChannel - engine channel on which this event occured on
584 schoenebeck 271 * @param itNoteOffEvent - key, velocity and time stamp of the event
585 schoenebeck 53 */
586 schoenebeck 411 void Engine::ProcessNoteOff(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOffEvent) {
587     midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[itNoteOffEvent->Param.Note.Key];
588 schoenebeck 53
589     pKey->KeyPressed = false; // the MIDI key was now released
590    
591     // release voices on this key if needed
592 schoenebeck 411 if (pKey->Active && !pEngineChannel->SustainPedal) {
593 schoenebeck 271 itNoteOffEvent->Type = Event::type_release; // transform event type
594 schoenebeck 53 }
595 schoenebeck 242
596 schoenebeck 271 // move event to the key's own event list
597     RTList<Event>::Iterator itNoteOffEventOnKeyList = itNoteOffEvent.moveToEndOf(pKey->pEvents);
598    
599 schoenebeck 242 // spawn release triggered voice(s) if needed
600     if (pKey->ReleaseTrigger) {
601 schoenebeck 411 LaunchVoice(pEngineChannel, itNoteOffEventOnKeyList, 0, true, false); //FIXME: for the moment we don't perform voice stealing for release triggered samples
602 schoenebeck 242 pKey->ReleaseTrigger = false;
603     }
604 schoenebeck 53 }
605    
606     /**
607     * Moves pitchbend event from the general (input) event list to the pitch
608     * event list.
609     *
610 schoenebeck 411 * @param pEngineChannel - engine channel on which this event occured on
611 schoenebeck 271 * @param itPitchbendEvent - absolute pitch value and time stamp of the event
612 schoenebeck 53 */
613 schoenebeck 411 void Engine::ProcessPitchbend(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itPitchbendEvent) {
614     pEngineChannel->Pitch = itPitchbendEvent->Param.Pitch.Pitch; // store current pitch value
615 schoenebeck 271 itPitchbendEvent.moveToEndOf(pSynthesisEvents[Event::destination_vco]);
616 schoenebeck 53 }
617    
618     /**
619 schoenebeck 233 * Allocates and triggers a new voice. This method will usually be
620     * called by the ProcessNoteOn() method and by the voices itself
621     * (e.g. to spawn further voices on the same key for layered sounds).
622     *
623 schoenebeck 411 * @param pEngineChannel - engine channel on which this event occured on
624 schoenebeck 271 * @param itNoteOnEvent - key, velocity and time stamp of the event
625 schoenebeck 242 * @param iLayer - layer index for the new voice (optional - only
626     * in case of layered sounds of course)
627     * @param ReleaseTriggerVoice - if new voice is a release triggered voice
628     * (optional, default = false)
629 schoenebeck 250 * @param VoiceStealing - if voice stealing should be performed
630     * when there is no free voice
631     * (optional, default = true)
632     * @returns pointer to new voice or NULL if there was no free voice or
633 schoenebeck 354 * if the voice wasn't triggered (for example when no region is
634     * defined for the given key).
635 schoenebeck 233 */
636 schoenebeck 411 Pool<Voice>::Iterator Engine::LaunchVoice(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOnEvent, int iLayer, bool ReleaseTriggerVoice, bool VoiceStealing) {
637     midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[itNoteOnEvent->Param.Note.Key];
638 schoenebeck 233
639     // allocate a new voice for the key
640 schoenebeck 271 Pool<Voice>::Iterator itNewVoice = pKey->pActiveVoices->allocAppend();
641     if (itNewVoice) {
642 schoenebeck 233 // launch the new voice
643 schoenebeck 411 if (itNewVoice->Trigger(pEngineChannel, itNoteOnEvent, pEngineChannel->Pitch, pEngineChannel->pInstrument, iLayer, ReleaseTriggerVoice, VoiceStealing) < 0) {
644 schoenebeck 354 dmsg(4,("Voice not triggered\n"));
645 schoenebeck 271 pKey->pActiveVoices->free(itNewVoice);
646 schoenebeck 233 }
647 schoenebeck 239 else { // on success
648     uint** ppKeyGroup = NULL;
649 schoenebeck 271 if (itNewVoice->KeyGroup) { // if this voice / key belongs to a key group
650 schoenebeck 411 ppKeyGroup = &pEngineChannel->ActiveKeyGroups[itNewVoice->KeyGroup];
651 schoenebeck 239 if (*ppKeyGroup) { // if there's already an active key in that key group
652 schoenebeck 411 midi_key_info_t* pOtherKey = &pEngineChannel->pMIDIKeyInfo[**ppKeyGroup];
653 schoenebeck 239 // kill all voices on the (other) key
654 schoenebeck 271 RTList<Voice>::Iterator itVoiceToBeKilled = pOtherKey->pActiveVoices->first();
655     RTList<Voice>::Iterator end = pOtherKey->pActiveVoices->end();
656     for (; itVoiceToBeKilled != end; ++itVoiceToBeKilled) {
657     if (itVoiceToBeKilled->Type != Voice::type_release_trigger) itVoiceToBeKilled->Kill(itNoteOnEvent);
658 schoenebeck 242 }
659 schoenebeck 239 }
660     }
661     if (!pKey->Active) { // mark as active key
662     pKey->Active = true;
663 schoenebeck 411 pKey->itSelf = pEngineChannel->pActiveKeys->allocAppend();
664 schoenebeck 271 *pKey->itSelf = itNoteOnEvent->Param.Note.Key;
665 schoenebeck 239 }
666 schoenebeck 271 if (itNewVoice->KeyGroup) {
667     *ppKeyGroup = &*pKey->itSelf; // put key as the (new) active key to its key group
668 schoenebeck 239 }
669 schoenebeck 271 if (itNewVoice->Type == Voice::type_release_trigger_required) pKey->ReleaseTrigger = true; // mark key for the need of release triggered voice(s)
670     return itNewVoice; // success
671 schoenebeck 233 }
672     }
673 schoenebeck 285 else if (VoiceStealing) {
674     // first, get total amount of required voices (dependant on amount of layers)
675 schoenebeck 411 ::gig::Region* pRegion = pEngineChannel->pInstrument->GetRegion(itNoteOnEvent->Param.Note.Key);
676 schoenebeck 285 if (!pRegion) return Pool<Voice>::Iterator(); // nothing defined for this MIDI key, so no voice needed
677     int voicesRequired = pRegion->Layers;
678 schoenebeck 250
679 schoenebeck 285 // now steal the (remaining) amount of voices
680     for (int i = iLayer; i < voicesRequired; i++)
681 schoenebeck 411 StealVoice(pEngineChannel, itNoteOnEvent);
682 schoenebeck 285
683     // put note-on event into voice-stealing queue, so it will be reprocessed after killed voice died
684     RTList<Event>::Iterator itStealEvent = pVoiceStealingQueue->allocAppend();
685     if (itStealEvent) {
686     *itStealEvent = *itNoteOnEvent; // copy event
687     itStealEvent->Param.Note.Layer = iLayer;
688     itStealEvent->Param.Note.ReleaseTrigger = ReleaseTriggerVoice;
689     }
690     else dmsg(1,("Voice stealing queue full!\n"));
691     }
692    
693 schoenebeck 271 return Pool<Voice>::Iterator(); // no free voice or error
694 schoenebeck 233 }
695    
696     /**
697 schoenebeck 250 * Will be called by LaunchVoice() method in case there are no free
698     * voices left. This method will select and kill one old voice for
699     * voice stealing and postpone the note-on event until the selected
700     * voice actually died.
701     *
702 schoenebeck 411 * @param pEngineChannel - engine channel on which this event occured on
703 schoenebeck 285 * @param itNoteOnEvent - key, velocity and time stamp of the event
704 schoenebeck 250 */
705 schoenebeck 411 void Engine::StealVoice(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOnEvent) {
706 schoenebeck 271 if (!pEventPool->poolIsEmpty()) {
707 schoenebeck 250
708 schoenebeck 271 RTList<uint>::Iterator iuiOldestKey;
709     RTList<Voice>::Iterator itOldestVoice;
710 schoenebeck 250
711     // Select one voice for voice stealing
712     switch (VOICE_STEAL_ALGORITHM) {
713    
714     // try to pick the oldest voice on the key where the new
715     // voice should be spawned, if there is no voice on that
716     // key, or no voice left to kill there, then procceed with
717     // 'oldestkey' algorithm
718     case voice_steal_algo_keymask: {
719 schoenebeck 411 midi_key_info_t* pOldestKey = &pEngineChannel->pMIDIKeyInfo[itNoteOnEvent->Param.Note.Key];
720 schoenebeck 412 if (pEngineChannel->itLastStolenVoice) {
721     itOldestVoice = pEngineChannel->itLastStolenVoice;
722 schoenebeck 271 ++itOldestVoice;
723 schoenebeck 250 }
724     else { // no voice stolen in this audio fragment cycle yet
725 schoenebeck 271 itOldestVoice = pOldestKey->pActiveVoices->first();
726 schoenebeck 250 }
727 schoenebeck 271 if (itOldestVoice) {
728     iuiOldestKey = pOldestKey->itSelf;
729 schoenebeck 250 break; // selection succeeded
730     }
731     } // no break - intentional !
732    
733     // try to pick the oldest voice on the oldest active key
734     // (caution: must stay after 'keymask' algorithm !)
735     case voice_steal_algo_oldestkey: {
736 schoenebeck 412 if (pEngineChannel->itLastStolenVoice) {
737     midi_key_info_t* pOldestKey = &pEngineChannel->pMIDIKeyInfo[*pEngineChannel->iuiLastStolenKey];
738     itOldestVoice = pEngineChannel->itLastStolenVoice;
739 schoenebeck 271 ++itOldestVoice;
740     if (!itOldestVoice) {
741 schoenebeck 412 iuiOldestKey = pEngineChannel->iuiLastStolenKey;
742 schoenebeck 271 ++iuiOldestKey;
743     if (iuiOldestKey) {
744 schoenebeck 411 midi_key_info_t* pOldestKey = &pEngineChannel->pMIDIKeyInfo[*iuiOldestKey];
745 schoenebeck 271 itOldestVoice = pOldestKey->pActiveVoices->first();
746 schoenebeck 250 }
747 schoenebeck 285 else {
748     dmsg(1,("gig::Engine: Warning, too less voices, even for voice stealing! - Better recompile with higher MAX_AUDIO_VOICES.\n"));
749 schoenebeck 250 return;
750     }
751     }
752 schoenebeck 412 else iuiOldestKey = pEngineChannel->iuiLastStolenKey;
753 schoenebeck 250 }
754     else { // no voice stolen in this audio fragment cycle yet
755 schoenebeck 411 iuiOldestKey = pEngineChannel->pActiveKeys->first();
756     midi_key_info_t* pOldestKey = &pEngineChannel->pMIDIKeyInfo[*iuiOldestKey];
757 schoenebeck 271 itOldestVoice = pOldestKey->pActiveVoices->first();
758 schoenebeck 250 }
759     break;
760     }
761    
762     // don't steal anything
763     case voice_steal_algo_none:
764     default: {
765     dmsg(1,("No free voice (voice stealing disabled)!\n"));
766     return;
767     }
768     }
769    
770 schoenebeck 287 //FIXME: can be removed, just a sanity check for debugging
771     if (!itOldestVoice->IsActive()) dmsg(1,("gig::Engine: ERROR, tried to steal a voice which was not active !!!\n"));
772    
773 schoenebeck 250 // now kill the selected voice
774 schoenebeck 271 itOldestVoice->Kill(itNoteOnEvent);
775 schoenebeck 250 // remember which voice on which key we stole, so we can simply proceed for the next voice stealing
776 schoenebeck 412 pEngineChannel->itLastStolenVoice = itOldestVoice;
777     pEngineChannel->iuiLastStolenKey = iuiOldestKey;
778 schoenebeck 250 }
779     else dmsg(1,("Event pool emtpy!\n"));
780     }
781    
782     /**
783 schoenebeck 285 * Removes the given voice from the MIDI key's list of active voices.
784     * This method will be called when a voice went inactive, e.g. because
785     * it finished to playback its sample, finished its release stage or
786     * just was killed.
787 schoenebeck 53 *
788 schoenebeck 411 * @param pEngineChannel - engine channel on which this event occured on
789 schoenebeck 285 * @param itVoice - points to the voice to be freed
790 schoenebeck 53 */
791 schoenebeck 411 void Engine::FreeVoice(EngineChannel* pEngineChannel, Pool<Voice>::Iterator& itVoice) {
792 schoenebeck 271 if (itVoice) {
793 schoenebeck 411 midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[itVoice->MIDIKey];
794 schoenebeck 53
795 schoenebeck 271 uint keygroup = itVoice->KeyGroup;
796    
797 schoenebeck 53 // free the voice object
798 schoenebeck 271 pVoicePool->free(itVoice);
799 schoenebeck 53
800 schoenebeck 287 // if no other voices left and member of a key group, remove from key group
801     if (pKey->pActiveVoices->isEmpty() && keygroup) {
802 schoenebeck 411 uint** ppKeyGroup = &pEngineChannel->ActiveKeyGroups[keygroup];
803 schoenebeck 287 if (*ppKeyGroup == &*pKey->itSelf) *ppKeyGroup = NULL; // remove key from key group
804 schoenebeck 53 }
805     }
806 schoenebeck 285 else std::cerr << "Couldn't release voice! (!itVoice)\n" << std::flush;
807 schoenebeck 53 }
808    
809     /**
810 schoenebeck 287 * Called when there's no more voice left on a key, this call will
811     * update the key info respectively.
812     *
813 schoenebeck 411 * @param pEngineChannel - engine channel on which this event occured on
814 schoenebeck 287 * @param pKey - key which is now inactive
815     */
816 schoenebeck 411 void Engine::FreeKey(EngineChannel* pEngineChannel, midi_key_info_t* pKey) {
817 schoenebeck 287 if (pKey->pActiveVoices->isEmpty()) {
818     pKey->Active = false;
819 schoenebeck 411 pEngineChannel->pActiveKeys->free(pKey->itSelf); // remove key from list of active keys
820 schoenebeck 287 pKey->itSelf = RTList<uint>::Iterator();
821     pKey->ReleaseTrigger = false;
822     pKey->pEvents->clear();
823     dmsg(3,("Key has no more voices now\n"));
824     }
825     else dmsg(1,("gig::Engine: Oops, tried to free a key which contains voices.\n"));
826     }
827    
828     /**
829 schoenebeck 53 * Reacts on supported control change commands (e.g. pitch bend wheel,
830     * modulation wheel, aftertouch).
831     *
832 schoenebeck 411 * @param pEngineChannel - engine channel on which this event occured on
833 schoenebeck 271 * @param itControlChangeEvent - controller, value and time stamp of the event
834 schoenebeck 53 */
835 schoenebeck 411 void Engine::ProcessControlChange(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itControlChangeEvent) {
836 schoenebeck 271 dmsg(4,("Engine::ContinuousController cc=%d v=%d\n", itControlChangeEvent->Param.CC.Controller, itControlChangeEvent->Param.CC.Value));
837 schoenebeck 53
838 schoenebeck 271 switch (itControlChangeEvent->Param.CC.Controller) {
839 schoenebeck 424 case 7: { // volume
840     //TODO: not sample accurate yet
841     pEngineChannel->GlobalVolume = (float) itControlChangeEvent->Param.CC.Value / 127.0f;
842     break;
843     }
844     case 10: { // panpot
845     //TODO: not sample accurate yet
846     const int pan = (int) itControlChangeEvent->Param.CC.Value - 64;
847     pEngineChannel->GlobalPanLeft = 1.0f - float(RTMath::Max(pan, 0)) / 63.0f;
848     pEngineChannel->GlobalPanRight = 1.0f - float(RTMath::Min(pan, 0)) / -64.0f;
849     break;
850     }
851     case 64: { // sustain
852 schoenebeck 411 if (itControlChangeEvent->Param.CC.Value >= 64 && !pEngineChannel->SustainPedal) {
853 schoenebeck 53 dmsg(4,("PEDAL DOWN\n"));
854 schoenebeck 411 pEngineChannel->SustainPedal = true;
855 schoenebeck 53
856     // cancel release process of voices if necessary
857 schoenebeck 411 RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();
858 schoenebeck 271 if (iuiKey) {
859     itControlChangeEvent->Type = Event::type_cancel_release; // transform event type
860     while (iuiKey) {
861 schoenebeck 411 midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];
862 schoenebeck 271 ++iuiKey;
863 schoenebeck 53 if (!pKey->KeyPressed) {
864 schoenebeck 271 RTList<Event>::Iterator itNewEvent = pKey->pEvents->allocAppend();
865     if (itNewEvent) *itNewEvent = *itControlChangeEvent; // copy event to the key's own event list
866 schoenebeck 53 else dmsg(1,("Event pool emtpy!\n"));
867     }
868     }
869     }
870     }
871 schoenebeck 411 if (itControlChangeEvent->Param.CC.Value < 64 && pEngineChannel->SustainPedal) {
872 schoenebeck 53 dmsg(4,("PEDAL UP\n"));
873 schoenebeck 411 pEngineChannel->SustainPedal = false;
874 schoenebeck 53
875     // release voices if their respective key is not pressed
876 schoenebeck 411 RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();
877 schoenebeck 271 if (iuiKey) {
878     itControlChangeEvent->Type = Event::type_release; // transform event type
879     while (iuiKey) {
880 schoenebeck 411 midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];
881 schoenebeck 271 ++iuiKey;
882 schoenebeck 53 if (!pKey->KeyPressed) {
883 schoenebeck 271 RTList<Event>::Iterator itNewEvent = pKey->pEvents->allocAppend();
884     if (itNewEvent) *itNewEvent = *itControlChangeEvent; // copy event to the key's own event list
885 schoenebeck 53 else dmsg(1,("Event pool emtpy!\n"));
886     }
887     }
888     }
889     }
890     break;
891     }
892     }
893    
894     // update controller value in the engine's controller table
895 schoenebeck 411 pEngineChannel->ControllerTable[itControlChangeEvent->Param.CC.Controller] = itControlChangeEvent->Param.CC.Value;
896 schoenebeck 53
897     // move event from the unsorted event list to the control change event list
898 schoenebeck 271 itControlChangeEvent.moveToEndOf(pCCEvents);
899 schoenebeck 53 }
900    
901     /**
902 schoenebeck 244 * Reacts on MIDI system exclusive messages.
903     *
904 schoenebeck 271 * @param itSysexEvent - sysex data size and time stamp of the sysex event
905 schoenebeck 244 */
906 schoenebeck 271 void Engine::ProcessSysex(Pool<Event>::Iterator& itSysexEvent) {
907 schoenebeck 244 RingBuffer<uint8_t>::NonVolatileReader reader = pSysexBuffer->get_non_volatile_reader();
908    
909     uint8_t exclusive_status, id;
910     if (!reader.pop(&exclusive_status)) goto free_sysex_data;
911     if (!reader.pop(&id)) goto free_sysex_data;
912     if (exclusive_status != 0xF0) goto free_sysex_data;
913    
914     switch (id) {
915     case 0x41: { // Roland
916     uint8_t device_id, model_id, cmd_id;
917     if (!reader.pop(&device_id)) goto free_sysex_data;
918     if (!reader.pop(&model_id)) goto free_sysex_data;
919     if (!reader.pop(&cmd_id)) goto free_sysex_data;
920     if (model_id != 0x42 /*GS*/) goto free_sysex_data;
921     if (cmd_id != 0x12 /*DT1*/) goto free_sysex_data;
922    
923     // command address
924     uint8_t addr[3]; // 2 byte addr MSB, followed by 1 byte addr LSB)
925     const RingBuffer<uint8_t>::NonVolatileReader checksum_reader = reader; // so we can calculate the check sum later
926     if (reader.read(&addr[0], 3) != 3) goto free_sysex_data;
927     if (addr[0] == 0x40 && addr[1] == 0x00) { // System Parameters
928     }
929     else if (addr[0] == 0x40 && addr[1] == 0x01) { // Common Parameters
930     }
931     else if (addr[0] == 0x40 && (addr[1] & 0xf0) == 0x10) { // Part Parameters (1)
932     switch (addr[3]) {
933     case 0x40: { // scale tuning
934     uint8_t scale_tunes[12]; // detuning of all 12 semitones of an octave
935     if (reader.read(&scale_tunes[0], 12) != 12) goto free_sysex_data;
936     uint8_t checksum;
937     if (!reader.pop(&checksum)) goto free_sysex_data;
938     if (GSCheckSum(checksum_reader, 12) != checksum) goto free_sysex_data;
939     for (int i = 0; i < 12; i++) scale_tunes[i] -= 64;
940     AdjustScale((int8_t*) scale_tunes);
941     break;
942     }
943     }
944     }
945     else if (addr[0] == 0x40 && (addr[1] & 0xf0) == 0x20) { // Part Parameters (2)
946     }
947     else if (addr[0] == 0x41) { // Drum Setup Parameters
948     }
949     break;
950     }
951     }
952    
953     free_sysex_data: // finally free sysex data
954 schoenebeck 271 pSysexBuffer->increment_read_ptr(itSysexEvent->Param.Sysex.Size);
955 schoenebeck 244 }
956    
957     /**
958     * Calculates the Roland GS sysex check sum.
959     *
960     * @param AddrReader - reader which currently points to the first GS
961     * command address byte of the GS sysex message in
962     * question
963     * @param DataSize - size of the GS message data (in bytes)
964     */
965     uint8_t Engine::GSCheckSum(const RingBuffer<uint8_t>::NonVolatileReader AddrReader, uint DataSize) {
966     RingBuffer<uint8_t>::NonVolatileReader reader = AddrReader;
967     uint bytes = 3 /*addr*/ + DataSize;
968     uint8_t addr_and_data[bytes];
969     reader.read(&addr_and_data[0], bytes);
970     uint8_t sum = 0;
971     for (uint i = 0; i < bytes; i++) sum += addr_and_data[i];
972     return 128 - sum % 128;
973     }
974    
975     /**
976     * Allows to tune each of the twelve semitones of an octave.
977     *
978     * @param ScaleTunes - detuning of all twelve semitones (in cents)
979     */
980     void Engine::AdjustScale(int8_t ScaleTunes[12]) {
981     memcpy(&this->ScaleTuning[0], &ScaleTunes[0], 12); //TODO: currently not sample accurate
982     }
983    
984     /**
985 schoenebeck 53 * Initialize the parameter sequence for the modulation destination given by
986     * by 'dst' with the constant value given by val.
987     */
988     void Engine::ResetSynthesisParameters(Event::destination_t dst, float val) {
989     int maxsamples = pAudioOutputDevice->MaxSamplesPerCycle();
990 schoenebeck 80 float* m = &pSynthesisParameters[dst][0];
991     for (int i = 0; i < maxsamples; i += 4) {
992     m[i] = val;
993     m[i+1] = val;
994     m[i+2] = val;
995     m[i+3] = val;
996     }
997 persson 438 }
998 schoenebeck 53
999     uint Engine::VoiceCount() {
1000     return ActiveVoiceCount;
1001     }
1002    
1003     uint Engine::VoiceCountMax() {
1004     return ActiveVoiceCountMax;
1005     }
1006    
1007     bool Engine::DiskStreamSupported() {
1008     return true;
1009     }
1010    
1011     uint Engine::DiskStreamCount() {
1012     return (pDiskThread) ? pDiskThread->ActiveStreamCount : 0;
1013     }
1014    
1015     uint Engine::DiskStreamCountMax() {
1016     return (pDiskThread) ? pDiskThread->ActiveStreamCountMax : 0;
1017     }
1018    
1019     String Engine::DiskStreamBufferFillBytes() {
1020     return pDiskThread->GetBufferFillBytes();
1021     }
1022    
1023     String Engine::DiskStreamBufferFillPercentage() {
1024     return pDiskThread->GetBufferFillPercentage();
1025     }
1026    
1027 senkov 112 String Engine::EngineName() {
1028     return "GigEngine";
1029     }
1030    
1031 schoenebeck 53 String Engine::Description() {
1032     return "Gigasampler Engine";
1033     }
1034    
1035     String Engine::Version() {
1036 persson 438 String s = "$Revision: 1.30 $";
1037 schoenebeck 123 return s.substr(11, s.size() - 13); // cut dollar signs, spaces and CVS macro keyword
1038 schoenebeck 53 }
1039    
1040     }} // namespace LinuxSampler::gig

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