1 |
/*************************************************************************** |
2 |
* * |
3 |
* LinuxSampler - modular, streaming capable sampler * |
4 |
* * |
5 |
* Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck * |
6 |
* Copyright (C) 2005 Christian Schoenebeck * |
7 |
* * |
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 |
#include "EGADSR.h" |
28 |
#include "../EngineFactory.h" |
29 |
|
30 |
#include "Engine.h" |
31 |
|
32 |
#if defined(__APPLE__) |
33 |
# include <stdlib.h> |
34 |
#else |
35 |
# include <malloc.h> |
36 |
#endif |
37 |
|
38 |
namespace LinuxSampler { namespace gig { |
39 |
|
40 |
InstrumentResourceManager Engine::instruments; |
41 |
|
42 |
std::map<AudioOutputDevice*,Engine*> Engine::engines; |
43 |
|
44 |
/** |
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 |
Engine* Engine::AcquireEngine(LinuxSampler::gig::EngineChannel* pChannel, AudioOutputDevice* pDevice) { |
55 |
Engine* pEngine = NULL; |
56 |
// check if there's already an engine for the given audio output device |
57 |
if (engines.count(pDevice)) { |
58 |
dmsg(4,("Using existing gig::Engine.\n")); |
59 |
pEngine = engines[pDevice]; |
60 |
} else { // create a new engine (and disk thread) instance for the given audio output device |
61 |
dmsg(4,("Creating new gig::Engine.\n")); |
62 |
pEngine = (Engine*) EngineFactory::Create("gig"); |
63 |
pEngine->Connect(pDevice); |
64 |
engines[pDevice] = pEngine; |
65 |
} |
66 |
// 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 |
return pEngine; |
70 |
} |
71 |
|
72 |
/** |
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 |
void Engine::FreeEngine(LinuxSampler::gig::EngineChannel* pChannel, AudioOutputDevice* pDevice) { |
83 |
dmsg(4,("Disconnecting EngineChannel from gig::Engine.\n")); |
84 |
Engine* pEngine = engines[pDevice]; |
85 |
// 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 |
} |
96 |
|
97 |
Engine::Engine() { |
98 |
pAudioOutputDevice = NULL; |
99 |
pDiskThread = NULL; |
100 |
pEventGenerator = NULL; |
101 |
pSysexBuffer = new RingBuffer<uint8_t>(SYSEX_BUFFER_SIZE, 0); |
102 |
pEventQueue = new RingBuffer<Event>(MAX_EVENTS_PER_FRAGMENT, 0); |
103 |
pEventPool = new Pool<Event>(MAX_EVENTS_PER_FRAGMENT); |
104 |
pVoicePool = new Pool<Voice>(MAX_AUDIO_VOICES); |
105 |
pVoiceStealingQueue = new RTList<Event>(pEventPool); |
106 |
pEvents = new RTList<Event>(pEventPool); |
107 |
pCCEvents = new RTList<Event>(pEventPool); |
108 |
|
109 |
for (uint i = 0; i < Event::destination_count; i++) { |
110 |
pSynthesisEvents[i] = new RTList<Event>(pEventPool); |
111 |
} |
112 |
for (RTList<Voice>::Iterator iterVoice = pVoicePool->allocAppend(); iterVoice == pVoicePool->last(); iterVoice = pVoicePool->allocAppend()) { |
113 |
iterVoice->SetEngine(this); |
114 |
} |
115 |
pVoicePool->clear(); |
116 |
|
117 |
pSynthesisParameters[0] = NULL; // we allocate when an audio device is connected |
118 |
pBasicFilterParameters = NULL; |
119 |
pMainFilterParameters = NULL; |
120 |
|
121 |
ResetInternal(); |
122 |
} |
123 |
|
124 |
Engine::~Engine() { |
125 |
if (pDiskThread) { |
126 |
dmsg(1,("Stopping disk thread...")); |
127 |
pDiskThread->StopThread(); |
128 |
delete pDiskThread; |
129 |
dmsg(1,("OK\n")); |
130 |
} |
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 |
if (pVoicePool) { |
139 |
pVoicePool->clear(); |
140 |
delete pVoicePool; |
141 |
} |
142 |
if (pEventGenerator) delete pEventGenerator; |
143 |
if (pMainFilterParameters) delete[] pMainFilterParameters; |
144 |
if (pBasicFilterParameters) delete[] pBasicFilterParameters; |
145 |
if (pSynthesisParameters[0]) free(pSynthesisParameters[0]); |
146 |
if (pVoiceStealingQueue) delete pVoiceStealingQueue; |
147 |
if (pSysexBuffer) delete pSysexBuffer; |
148 |
EngineFactory::Destroy(this); |
149 |
} |
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 |
dmsg(3,("gig::Engine: enabled (val=%d)\n", EngineDisabled.GetUnsafe())); |
155 |
} |
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 |
// reset voice stealing parameters |
188 |
pVoiceStealingQueue->clear(); |
189 |
|
190 |
// reset to normal chromatic scale (means equal temper) |
191 |
memset(&ScaleTuning[0], 0x00, 12); |
192 |
|
193 |
// reset all voices |
194 |
for (RTList<Voice>::Iterator iterVoice = pVoicePool->allocAppend(); iterVoice == pVoicePool->last(); iterVoice = pVoicePool->allocAppend()) { |
195 |
iterVoice->Reset(); |
196 |
} |
197 |
pVoicePool->clear(); |
198 |
|
199 |
// reset disk thread |
200 |
if (pDiskThread) pDiskThread->Reset(); |
201 |
|
202 |
// delete all input events |
203 |
pEventQueue->init(); |
204 |
} |
205 |
|
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 |
|
220 |
this->MaxSamplesPerCycle = pAudioOutputDevice->MaxSamplesPerCycle(); |
221 |
this->SampleRate = pAudioOutputDevice->SampleRate(); |
222 |
|
223 |
// 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 |
throw LinuxSamplerException("EG_MIN_RELEASE_TIME in EGADSR.h too big for current audio fragment size / sampling rate!"); |
227 |
|
228 |
// (re)create disk thread |
229 |
if (this->pDiskThread) { |
230 |
dmsg(1,("Stopping disk thread...")); |
231 |
this->pDiskThread->StopThread(); |
232 |
delete this->pDiskThread; |
233 |
dmsg(1,("OK\n")); |
234 |
} |
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 |
for (RTList<Voice>::Iterator iterVoice = pVoicePool->allocAppend(); iterVoice == pVoicePool->last(); iterVoice = pVoicePool->allocAppend()) { |
242 |
iterVoice->pDiskThread = this->pDiskThread; |
243 |
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 |
if (pSynthesisParameters[0]) free(pSynthesisParameters[0]); |
253 |
|
254 |
#if defined(__APPLE__) |
255 |
pSynthesisParameters[0] = (float *) malloc(Event::destination_count * sizeof(float) * pAudioOut->MaxSamplesPerCycle()); |
256 |
#else |
257 |
pSynthesisParameters[0] = (float *) memalign(16,(Event::destination_count * sizeof(float) * pAudioOut->MaxSamplesPerCycle())); |
258 |
#endif |
259 |
for (int dst = 1; dst < Event::destination_count; dst++) |
260 |
pSynthesisParameters[dst] = pSynthesisParameters[dst - 1] + pAudioOut->MaxSamplesPerCycle(); |
261 |
|
262 |
// (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 |
dmsg(1,("Starting disk thread...")); |
269 |
pDiskThread->StartThread(); |
270 |
dmsg(1,("OK\n")); |
271 |
|
272 |
for (RTList<Voice>::Iterator iterVoice = pVoicePool->allocAppend(); iterVoice == pVoicePool->last(); iterVoice = pVoicePool->allocAppend()) { |
273 |
if (!iterVoice->pDiskThread) { |
274 |
dmsg(0,("Engine -> voice::trigger: !pDiskThread\n")); |
275 |
exit(EXIT_FAILURE); |
276 |
} |
277 |
} |
278 |
} |
279 |
|
280 |
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 |
/** |
289 |
* 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 |
} |
324 |
|
325 |
/** |
326 |
* 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 |
int Engine::RenderAudio(uint Samples) { |
336 |
dmsg(5,("RenderAudio(Samples=%d)\n", Samples)); |
337 |
|
338 |
// return if engine disabled |
339 |
if (EngineDisabled.Pop()) { |
340 |
dmsg(5,("gig::Engine: engine disabled (val=%d)\n",EngineDisabled.GetUnsafe())); |
341 |
return 0; |
342 |
} |
343 |
|
344 |
// update time of start and end of this audio fragment (as events' time stamps relate to this) |
345 |
pEventGenerator->UpdateFragmentTime(Samples); |
346 |
|
347 |
// empty the engine's event lists for the new fragment |
348 |
ClearEventLists(); |
349 |
|
350 |
// 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 |
} |
367 |
|
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 |
{ |
374 |
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 |
RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first(); |
395 |
RTList<uint>::Iterator end = pEngineChannel->pActiveKeys->end(); |
396 |
for(; iuiKey != end; ++iuiKey) { |
397 |
pEngineChannel->pMIDIKeyInfo[*iuiKey].pEvents->clear(); // free all events on the key |
398 |
} |
399 |
} |
400 |
|
401 |
|
402 |
// 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 |
ImportEvents(pEngineChannel->pEventQueue, Samples); |
405 |
|
406 |
|
407 |
// process events |
408 |
{ |
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 |
ProcessNoteOn((EngineChannel*)itEvent->pEngineChannel, itEvent); |
416 |
break; |
417 |
case Event::type_note_off: |
418 |
dmsg(5,("Engine: Note off received\n")); |
419 |
ProcessNoteOff((EngineChannel*)itEvent->pEngineChannel, itEvent); |
420 |
break; |
421 |
case Event::type_control_change: |
422 |
dmsg(5,("Engine: MIDI CC received\n")); |
423 |
ProcessControlChange((EngineChannel*)itEvent->pEngineChannel, itEvent); |
424 |
break; |
425 |
case Event::type_pitchbend: |
426 |
dmsg(5,("Engine: Pitchbend received\n")); |
427 |
ProcessPitchbend((EngineChannel*)itEvent->pEngineChannel, itEvent); |
428 |
break; |
429 |
} |
430 |
} |
431 |
} |
432 |
|
433 |
|
434 |
// render audio from all active voices |
435 |
{ |
436 |
RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first(); |
437 |
RTList<uint>::Iterator end = pEngineChannel->pActiveKeys->end(); |
438 |
while (iuiKey != end) { // iterate through all active keys |
439 |
midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey]; |
440 |
++iuiKey; |
441 |
|
442 |
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 |
if (itVoice->IsActive()) ActiveVoiceCountTemp++; // still active |
448 |
else { // voice reached end, is now inactive |
449 |
FreeVoice(pEngineChannel, itVoice); // remove voice from the list of active voices |
450 |
} |
451 |
} |
452 |
} |
453 |
} |
454 |
|
455 |
|
456 |
// now render all postponed voices from voice stealing |
457 |
{ |
458 |
RTList<Event>::Iterator itVoiceStealEvent = pVoiceStealingQueue->first(); |
459 |
RTList<Event>::Iterator end = pVoiceStealingQueue->end(); |
460 |
for (; itVoiceStealEvent != end; ++itVoiceStealEvent) { |
461 |
Pool<Voice>::Iterator itNewVoice = |
462 |
LaunchVoice(pEngineChannel, itVoiceStealEvent, itVoiceStealEvent->Param.Note.Layer, itVoiceStealEvent->Param.Note.ReleaseTrigger, false); |
463 |
if (itNewVoice) { |
464 |
for (; itNewVoice; itNewVoice = itNewVoice->itChildVoice) { |
465 |
itNewVoice->Render(Samples); |
466 |
if (itNewVoice->IsActive()) ActiveVoiceCountTemp++; // still active |
467 |
else { // voice reached end, is now inactive |
468 |
FreeVoice(pEngineChannel, itNewVoice); // remove voice from the list of active voices |
469 |
} |
470 |
} |
471 |
} |
472 |
else dmsg(1,("gig::Engine: ERROR, voice stealing didn't work out!\n")); |
473 |
} |
474 |
} |
475 |
// reset voice stealing for the new fragment |
476 |
pVoiceStealingQueue->clear(); |
477 |
pEngineChannel->itLastStolenVoice = RTList<Voice>::Iterator(); |
478 |
pEngineChannel->iuiLastStolenKey = RTList<uint>::Iterator(); |
479 |
|
480 |
|
481 |
// free all keys which have no active voices left |
482 |
{ |
483 |
RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first(); |
484 |
RTList<uint>::Iterator end = pEngineChannel->pActiveKeys->end(); |
485 |
while (iuiKey != end) { // iterate through all active keys |
486 |
midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey]; |
487 |
++iuiKey; |
488 |
if (pKey->pActiveVoices->isEmpty()) FreeKey(pEngineChannel, pKey); |
489 |
#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 |
} |
503 |
|
504 |
/** |
505 |
* 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 |
Event event = pEventGenerator->CreateEvent(); |
513 |
event.Type = Event::type_sysex; |
514 |
event.Param.Sysex.Size = Size; |
515 |
event.pEngineChannel = NULL; // as Engine global event |
516 |
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 |
* Assigns and triggers a new voice for the respective MIDI key. |
538 |
* |
539 |
* @param pEngineChannel - engine channel on which this event occured on |
540 |
* @param itNoteOnEvent - key, velocity and time stamp of the event |
541 |
*/ |
542 |
void Engine::ProcessNoteOn(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOnEvent) { |
543 |
|
544 |
const int key = itNoteOnEvent->Param.Note.Key; |
545 |
|
546 |
// Change key dimension value if key is in keyswitching area |
547 |
{ |
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 |
|
554 |
midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[key]; |
555 |
|
556 |
pKey->KeyPressed = true; // the MIDI key was now pressed down |
557 |
|
558 |
// cancel release process of voices on this key if needed |
559 |
if (pKey->Active && !pEngineChannel->SustainPedal) { |
560 |
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 |
} |
565 |
else dmsg(1,("Event pool emtpy!\n")); |
566 |
} |
567 |
|
568 |
// move note on event to the key's own event list |
569 |
RTList<Event>::Iterator itNoteOnEventOnKeyList = itNoteOnEvent.moveToEndOf(pKey->pEvents); |
570 |
|
571 |
// allocate and trigger a new voice for the key |
572 |
LaunchVoice(pEngineChannel, itNoteOnEventOnKeyList, 0, false, true); |
573 |
} |
574 |
|
575 |
/** |
576 |
* Releases the voices on the given key if sustain pedal is not pressed. |
577 |
* If sustain is pressed, the release of the note will be postponed until |
578 |
* sustain pedal will be released or voice turned inactive by itself (e.g. |
579 |
* due to completion of sample playback). |
580 |
* |
581 |
* @param pEngineChannel - engine channel on which this event occured on |
582 |
* @param itNoteOffEvent - key, velocity and time stamp of the event |
583 |
*/ |
584 |
void Engine::ProcessNoteOff(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOffEvent) { |
585 |
midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[itNoteOffEvent->Param.Note.Key]; |
586 |
|
587 |
pKey->KeyPressed = false; // the MIDI key was now released |
588 |
|
589 |
// release voices on this key if needed |
590 |
if (pKey->Active && !pEngineChannel->SustainPedal) { |
591 |
itNoteOffEvent->Type = Event::type_release; // transform event type |
592 |
} |
593 |
|
594 |
// move event to the key's own event list |
595 |
RTList<Event>::Iterator itNoteOffEventOnKeyList = itNoteOffEvent.moveToEndOf(pKey->pEvents); |
596 |
|
597 |
// spawn release triggered voice(s) if needed |
598 |
if (pKey->ReleaseTrigger) { |
599 |
LaunchVoice(pEngineChannel, itNoteOffEventOnKeyList, 0, true, false); //FIXME: for the moment we don't perform voice stealing for release triggered samples |
600 |
pKey->ReleaseTrigger = false; |
601 |
} |
602 |
} |
603 |
|
604 |
/** |
605 |
* Moves pitchbend event from the general (input) event list to the pitch |
606 |
* event list. |
607 |
* |
608 |
* @param pEngineChannel - engine channel on which this event occured on |
609 |
* @param itPitchbendEvent - absolute pitch value and time stamp of the event |
610 |
*/ |
611 |
void Engine::ProcessPitchbend(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itPitchbendEvent) { |
612 |
pEngineChannel->Pitch = itPitchbendEvent->Param.Pitch.Pitch; // store current pitch value |
613 |
itPitchbendEvent.moveToEndOf(pSynthesisEvents[Event::destination_vco]); |
614 |
} |
615 |
|
616 |
/** |
617 |
* Allocates and triggers a new voice. This method will usually be |
618 |
* called by the ProcessNoteOn() method and by the voices itself |
619 |
* (e.g. to spawn further voices on the same key for layered sounds). |
620 |
* |
621 |
* @param pEngineChannel - engine channel on which this event occured on |
622 |
* @param itNoteOnEvent - key, velocity and time stamp of the event |
623 |
* @param iLayer - layer index for the new voice (optional - only |
624 |
* in case of layered sounds of course) |
625 |
* @param ReleaseTriggerVoice - if new voice is a release triggered voice |
626 |
* (optional, default = false) |
627 |
* @param VoiceStealing - if voice stealing should be performed |
628 |
* when there is no free voice |
629 |
* (optional, default = true) |
630 |
* @returns pointer to new voice or NULL if there was no free voice or |
631 |
* if the voice wasn't triggered (for example when no region is |
632 |
* defined for the given key). |
633 |
*/ |
634 |
Pool<Voice>::Iterator Engine::LaunchVoice(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOnEvent, int iLayer, bool ReleaseTriggerVoice, bool VoiceStealing) { |
635 |
midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[itNoteOnEvent->Param.Note.Key]; |
636 |
|
637 |
// allocate a new voice for the key |
638 |
Pool<Voice>::Iterator itNewVoice = pKey->pActiveVoices->allocAppend(); |
639 |
if (itNewVoice) { |
640 |
// launch the new voice |
641 |
if (itNewVoice->Trigger(pEngineChannel, itNoteOnEvent, pEngineChannel->Pitch, pEngineChannel->pInstrument, iLayer, ReleaseTriggerVoice, VoiceStealing) < 0) { |
642 |
dmsg(4,("Voice not triggered\n")); |
643 |
pKey->pActiveVoices->free(itNewVoice); |
644 |
} |
645 |
else { // on success |
646 |
uint** ppKeyGroup = NULL; |
647 |
if (itNewVoice->KeyGroup) { // if this voice / key belongs to a key group |
648 |
ppKeyGroup = &pEngineChannel->ActiveKeyGroups[itNewVoice->KeyGroup]; |
649 |
if (*ppKeyGroup) { // if there's already an active key in that key group |
650 |
midi_key_info_t* pOtherKey = &pEngineChannel->pMIDIKeyInfo[**ppKeyGroup]; |
651 |
// kill all voices on the (other) key |
652 |
RTList<Voice>::Iterator itVoiceToBeKilled = pOtherKey->pActiveVoices->first(); |
653 |
RTList<Voice>::Iterator end = pOtherKey->pActiveVoices->end(); |
654 |
for (; itVoiceToBeKilled != end; ++itVoiceToBeKilled) { |
655 |
if (itVoiceToBeKilled->Type != Voice::type_release_trigger) itVoiceToBeKilled->Kill(itNoteOnEvent); |
656 |
} |
657 |
} |
658 |
} |
659 |
if (!pKey->Active) { // mark as active key |
660 |
pKey->Active = true; |
661 |
pKey->itSelf = pEngineChannel->pActiveKeys->allocAppend(); |
662 |
*pKey->itSelf = itNoteOnEvent->Param.Note.Key; |
663 |
} |
664 |
if (itNewVoice->KeyGroup) { |
665 |
*ppKeyGroup = &*pKey->itSelf; // put key as the (new) active key to its key group |
666 |
} |
667 |
if (itNewVoice->Type == Voice::type_release_trigger_required) pKey->ReleaseTrigger = true; // mark key for the need of release triggered voice(s) |
668 |
return itNewVoice; // success |
669 |
} |
670 |
} |
671 |
else if (VoiceStealing) { |
672 |
// first, get total amount of required voices (dependant on amount of layers) |
673 |
::gig::Region* pRegion = pEngineChannel->pInstrument->GetRegion(itNoteOnEvent->Param.Note.Key); |
674 |
if (!pRegion) return Pool<Voice>::Iterator(); // nothing defined for this MIDI key, so no voice needed |
675 |
int voicesRequired = pRegion->Layers; |
676 |
|
677 |
// now steal the (remaining) amount of voices |
678 |
for (int i = iLayer; i < voicesRequired; i++) |
679 |
StealVoice(pEngineChannel, itNoteOnEvent); |
680 |
|
681 |
// put note-on event into voice-stealing queue, so it will be reprocessed after killed voice died |
682 |
RTList<Event>::Iterator itStealEvent = pVoiceStealingQueue->allocAppend(); |
683 |
if (itStealEvent) { |
684 |
*itStealEvent = *itNoteOnEvent; // copy event |
685 |
itStealEvent->Param.Note.Layer = iLayer; |
686 |
itStealEvent->Param.Note.ReleaseTrigger = ReleaseTriggerVoice; |
687 |
} |
688 |
else dmsg(1,("Voice stealing queue full!\n")); |
689 |
} |
690 |
|
691 |
return Pool<Voice>::Iterator(); // no free voice or error |
692 |
} |
693 |
|
694 |
/** |
695 |
* Will be called by LaunchVoice() method in case there are no free |
696 |
* voices left. This method will select and kill one old voice for |
697 |
* voice stealing and postpone the note-on event until the selected |
698 |
* voice actually died. |
699 |
* |
700 |
* @param pEngineChannel - engine channel on which this event occured on |
701 |
* @param itNoteOnEvent - key, velocity and time stamp of the event |
702 |
*/ |
703 |
void Engine::StealVoice(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOnEvent) { |
704 |
if (!pEventPool->poolIsEmpty()) { |
705 |
|
706 |
RTList<uint>::Iterator iuiOldestKey; |
707 |
RTList<Voice>::Iterator itOldestVoice; |
708 |
|
709 |
// Select one voice for voice stealing |
710 |
switch (VOICE_STEAL_ALGORITHM) { |
711 |
|
712 |
// try to pick the oldest voice on the key where the new |
713 |
// voice should be spawned, if there is no voice on that |
714 |
// key, or no voice left to kill there, then procceed with |
715 |
// 'oldestkey' algorithm |
716 |
case voice_steal_algo_keymask: { |
717 |
midi_key_info_t* pOldestKey = &pEngineChannel->pMIDIKeyInfo[itNoteOnEvent->Param.Note.Key]; |
718 |
if (pEngineChannel->itLastStolenVoice) { |
719 |
itOldestVoice = pEngineChannel->itLastStolenVoice; |
720 |
++itOldestVoice; |
721 |
} |
722 |
else { // no voice stolen in this audio fragment cycle yet |
723 |
itOldestVoice = pOldestKey->pActiveVoices->first(); |
724 |
} |
725 |
if (itOldestVoice) { |
726 |
iuiOldestKey = pOldestKey->itSelf; |
727 |
break; // selection succeeded |
728 |
} |
729 |
} // no break - intentional ! |
730 |
|
731 |
// try to pick the oldest voice on the oldest active key |
732 |
// (caution: must stay after 'keymask' algorithm !) |
733 |
case voice_steal_algo_oldestkey: { |
734 |
if (pEngineChannel->itLastStolenVoice) { |
735 |
midi_key_info_t* pOldestKey = &pEngineChannel->pMIDIKeyInfo[*pEngineChannel->iuiLastStolenKey]; |
736 |
itOldestVoice = pEngineChannel->itLastStolenVoice; |
737 |
++itOldestVoice; |
738 |
if (!itOldestVoice) { |
739 |
iuiOldestKey = pEngineChannel->iuiLastStolenKey; |
740 |
++iuiOldestKey; |
741 |
if (iuiOldestKey) { |
742 |
midi_key_info_t* pOldestKey = &pEngineChannel->pMIDIKeyInfo[*iuiOldestKey]; |
743 |
itOldestVoice = pOldestKey->pActiveVoices->first(); |
744 |
} |
745 |
else { |
746 |
dmsg(1,("gig::Engine: Warning, too less voices, even for voice stealing! - Better recompile with higher MAX_AUDIO_VOICES.\n")); |
747 |
return; |
748 |
} |
749 |
} |
750 |
else iuiOldestKey = pEngineChannel->iuiLastStolenKey; |
751 |
} |
752 |
else { // no voice stolen in this audio fragment cycle yet |
753 |
iuiOldestKey = pEngineChannel->pActiveKeys->first(); |
754 |
midi_key_info_t* pOldestKey = &pEngineChannel->pMIDIKeyInfo[*iuiOldestKey]; |
755 |
itOldestVoice = pOldestKey->pActiveVoices->first(); |
756 |
} |
757 |
break; |
758 |
} |
759 |
|
760 |
// don't steal anything |
761 |
case voice_steal_algo_none: |
762 |
default: { |
763 |
dmsg(1,("No free voice (voice stealing disabled)!\n")); |
764 |
return; |
765 |
} |
766 |
} |
767 |
|
768 |
//FIXME: can be removed, just a sanity check for debugging |
769 |
if (!itOldestVoice->IsActive()) dmsg(1,("gig::Engine: ERROR, tried to steal a voice which was not active !!!\n")); |
770 |
|
771 |
// now kill the selected voice |
772 |
itOldestVoice->Kill(itNoteOnEvent); |
773 |
// remember which voice on which key we stole, so we can simply proceed for the next voice stealing |
774 |
pEngineChannel->itLastStolenVoice = itOldestVoice; |
775 |
pEngineChannel->iuiLastStolenKey = iuiOldestKey; |
776 |
} |
777 |
else dmsg(1,("Event pool emtpy!\n")); |
778 |
} |
779 |
|
780 |
/** |
781 |
* Removes the given voice from the MIDI key's list of active voices. |
782 |
* This method will be called when a voice went inactive, e.g. because |
783 |
* it finished to playback its sample, finished its release stage or |
784 |
* just was killed. |
785 |
* |
786 |
* @param pEngineChannel - engine channel on which this event occured on |
787 |
* @param itVoice - points to the voice to be freed |
788 |
*/ |
789 |
void Engine::FreeVoice(EngineChannel* pEngineChannel, Pool<Voice>::Iterator& itVoice) { |
790 |
if (itVoice) { |
791 |
midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[itVoice->MIDIKey]; |
792 |
|
793 |
uint keygroup = itVoice->KeyGroup; |
794 |
|
795 |
// free the voice object |
796 |
pVoicePool->free(itVoice); |
797 |
|
798 |
// if no other voices left and member of a key group, remove from key group |
799 |
if (pKey->pActiveVoices->isEmpty() && keygroup) { |
800 |
uint** ppKeyGroup = &pEngineChannel->ActiveKeyGroups[keygroup]; |
801 |
if (*ppKeyGroup == &*pKey->itSelf) *ppKeyGroup = NULL; // remove key from key group |
802 |
} |
803 |
} |
804 |
else std::cerr << "Couldn't release voice! (!itVoice)\n" << std::flush; |
805 |
} |
806 |
|
807 |
/** |
808 |
* Called when there's no more voice left on a key, this call will |
809 |
* update the key info respectively. |
810 |
* |
811 |
* @param pEngineChannel - engine channel on which this event occured on |
812 |
* @param pKey - key which is now inactive |
813 |
*/ |
814 |
void Engine::FreeKey(EngineChannel* pEngineChannel, midi_key_info_t* pKey) { |
815 |
if (pKey->pActiveVoices->isEmpty()) { |
816 |
pKey->Active = false; |
817 |
pEngineChannel->pActiveKeys->free(pKey->itSelf); // remove key from list of active keys |
818 |
pKey->itSelf = RTList<uint>::Iterator(); |
819 |
pKey->ReleaseTrigger = false; |
820 |
pKey->pEvents->clear(); |
821 |
dmsg(3,("Key has no more voices now\n")); |
822 |
} |
823 |
else dmsg(1,("gig::Engine: Oops, tried to free a key which contains voices.\n")); |
824 |
} |
825 |
|
826 |
/** |
827 |
* Reacts on supported control change commands (e.g. pitch bend wheel, |
828 |
* modulation wheel, aftertouch). |
829 |
* |
830 |
* @param pEngineChannel - engine channel on which this event occured on |
831 |
* @param itControlChangeEvent - controller, value and time stamp of the event |
832 |
*/ |
833 |
void Engine::ProcessControlChange(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itControlChangeEvent) { |
834 |
dmsg(4,("Engine::ContinuousController cc=%d v=%d\n", itControlChangeEvent->Param.CC.Controller, itControlChangeEvent->Param.CC.Value)); |
835 |
|
836 |
switch (itControlChangeEvent->Param.CC.Controller) { |
837 |
case 7: { // volume |
838 |
//TODO: not sample accurate yet |
839 |
pEngineChannel->GlobalVolume = (float) itControlChangeEvent->Param.CC.Value / 127.0f; |
840 |
break; |
841 |
} |
842 |
case 10: { // panpot |
843 |
//TODO: not sample accurate yet |
844 |
const int pan = (int) itControlChangeEvent->Param.CC.Value - 64; |
845 |
pEngineChannel->GlobalPanLeft = 1.0f - float(RTMath::Max(pan, 0)) / 63.0f; |
846 |
pEngineChannel->GlobalPanRight = 1.0f - float(RTMath::Min(pan, 0)) / -64.0f; |
847 |
break; |
848 |
} |
849 |
case 64: { // sustain |
850 |
if (itControlChangeEvent->Param.CC.Value >= 64 && !pEngineChannel->SustainPedal) { |
851 |
dmsg(4,("PEDAL DOWN\n")); |
852 |
pEngineChannel->SustainPedal = true; |
853 |
|
854 |
// cancel release process of voices if necessary |
855 |
RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first(); |
856 |
if (iuiKey) { |
857 |
itControlChangeEvent->Type = Event::type_cancel_release; // transform event type |
858 |
while (iuiKey) { |
859 |
midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey]; |
860 |
++iuiKey; |
861 |
if (!pKey->KeyPressed) { |
862 |
RTList<Event>::Iterator itNewEvent = pKey->pEvents->allocAppend(); |
863 |
if (itNewEvent) *itNewEvent = *itControlChangeEvent; // copy event to the key's own event list |
864 |
else dmsg(1,("Event pool emtpy!\n")); |
865 |
} |
866 |
} |
867 |
} |
868 |
} |
869 |
if (itControlChangeEvent->Param.CC.Value < 64 && pEngineChannel->SustainPedal) { |
870 |
dmsg(4,("PEDAL UP\n")); |
871 |
pEngineChannel->SustainPedal = false; |
872 |
|
873 |
// release voices if their respective key is not pressed |
874 |
RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first(); |
875 |
if (iuiKey) { |
876 |
itControlChangeEvent->Type = Event::type_release; // transform event type |
877 |
while (iuiKey) { |
878 |
midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey]; |
879 |
++iuiKey; |
880 |
if (!pKey->KeyPressed) { |
881 |
RTList<Event>::Iterator itNewEvent = pKey->pEvents->allocAppend(); |
882 |
if (itNewEvent) *itNewEvent = *itControlChangeEvent; // copy event to the key's own event list |
883 |
else dmsg(1,("Event pool emtpy!\n")); |
884 |
} |
885 |
} |
886 |
} |
887 |
} |
888 |
break; |
889 |
} |
890 |
} |
891 |
|
892 |
// update controller value in the engine's controller table |
893 |
pEngineChannel->ControllerTable[itControlChangeEvent->Param.CC.Controller] = itControlChangeEvent->Param.CC.Value; |
894 |
|
895 |
// move event from the unsorted event list to the control change event list |
896 |
itControlChangeEvent.moveToEndOf(pCCEvents); |
897 |
} |
898 |
|
899 |
/** |
900 |
* Reacts on MIDI system exclusive messages. |
901 |
* |
902 |
* @param itSysexEvent - sysex data size and time stamp of the sysex event |
903 |
*/ |
904 |
void Engine::ProcessSysex(Pool<Event>::Iterator& itSysexEvent) { |
905 |
RingBuffer<uint8_t>::NonVolatileReader reader = pSysexBuffer->get_non_volatile_reader(); |
906 |
|
907 |
uint8_t exclusive_status, id; |
908 |
if (!reader.pop(&exclusive_status)) goto free_sysex_data; |
909 |
if (!reader.pop(&id)) goto free_sysex_data; |
910 |
if (exclusive_status != 0xF0) goto free_sysex_data; |
911 |
|
912 |
switch (id) { |
913 |
case 0x41: { // Roland |
914 |
uint8_t device_id, model_id, cmd_id; |
915 |
if (!reader.pop(&device_id)) goto free_sysex_data; |
916 |
if (!reader.pop(&model_id)) goto free_sysex_data; |
917 |
if (!reader.pop(&cmd_id)) goto free_sysex_data; |
918 |
if (model_id != 0x42 /*GS*/) goto free_sysex_data; |
919 |
if (cmd_id != 0x12 /*DT1*/) goto free_sysex_data; |
920 |
|
921 |
// command address |
922 |
uint8_t addr[3]; // 2 byte addr MSB, followed by 1 byte addr LSB) |
923 |
const RingBuffer<uint8_t>::NonVolatileReader checksum_reader = reader; // so we can calculate the check sum later |
924 |
if (reader.read(&addr[0], 3) != 3) goto free_sysex_data; |
925 |
if (addr[0] == 0x40 && addr[1] == 0x00) { // System Parameters |
926 |
} |
927 |
else if (addr[0] == 0x40 && addr[1] == 0x01) { // Common Parameters |
928 |
} |
929 |
else if (addr[0] == 0x40 && (addr[1] & 0xf0) == 0x10) { // Part Parameters (1) |
930 |
switch (addr[3]) { |
931 |
case 0x40: { // scale tuning |
932 |
uint8_t scale_tunes[12]; // detuning of all 12 semitones of an octave |
933 |
if (reader.read(&scale_tunes[0], 12) != 12) goto free_sysex_data; |
934 |
uint8_t checksum; |
935 |
if (!reader.pop(&checksum)) goto free_sysex_data; |
936 |
if (GSCheckSum(checksum_reader, 12) != checksum) goto free_sysex_data; |
937 |
for (int i = 0; i < 12; i++) scale_tunes[i] -= 64; |
938 |
AdjustScale((int8_t*) scale_tunes); |
939 |
break; |
940 |
} |
941 |
} |
942 |
} |
943 |
else if (addr[0] == 0x40 && (addr[1] & 0xf0) == 0x20) { // Part Parameters (2) |
944 |
} |
945 |
else if (addr[0] == 0x41) { // Drum Setup Parameters |
946 |
} |
947 |
break; |
948 |
} |
949 |
} |
950 |
|
951 |
free_sysex_data: // finally free sysex data |
952 |
pSysexBuffer->increment_read_ptr(itSysexEvent->Param.Sysex.Size); |
953 |
} |
954 |
|
955 |
/** |
956 |
* Calculates the Roland GS sysex check sum. |
957 |
* |
958 |
* @param AddrReader - reader which currently points to the first GS |
959 |
* command address byte of the GS sysex message in |
960 |
* question |
961 |
* @param DataSize - size of the GS message data (in bytes) |
962 |
*/ |
963 |
uint8_t Engine::GSCheckSum(const RingBuffer<uint8_t>::NonVolatileReader AddrReader, uint DataSize) { |
964 |
RingBuffer<uint8_t>::NonVolatileReader reader = AddrReader; |
965 |
uint bytes = 3 /*addr*/ + DataSize; |
966 |
uint8_t addr_and_data[bytes]; |
967 |
reader.read(&addr_and_data[0], bytes); |
968 |
uint8_t sum = 0; |
969 |
for (uint i = 0; i < bytes; i++) sum += addr_and_data[i]; |
970 |
return 128 - sum % 128; |
971 |
} |
972 |
|
973 |
/** |
974 |
* Allows to tune each of the twelve semitones of an octave. |
975 |
* |
976 |
* @param ScaleTunes - detuning of all twelve semitones (in cents) |
977 |
*/ |
978 |
void Engine::AdjustScale(int8_t ScaleTunes[12]) { |
979 |
memcpy(&this->ScaleTuning[0], &ScaleTunes[0], 12); //TODO: currently not sample accurate |
980 |
} |
981 |
|
982 |
/** |
983 |
* Initialize the parameter sequence for the modulation destination given by |
984 |
* by 'dst' with the constant value given by val. |
985 |
*/ |
986 |
void Engine::ResetSynthesisParameters(Event::destination_t dst, float val) { |
987 |
int maxsamples = pAudioOutputDevice->MaxSamplesPerCycle(); |
988 |
float* m = &pSynthesisParameters[dst][0]; |
989 |
for (int i = 0; i < maxsamples; i += 4) { |
990 |
m[i] = val; |
991 |
m[i+1] = val; |
992 |
m[i+2] = val; |
993 |
m[i+3] = val; |
994 |
} |
995 |
} |
996 |
|
997 |
uint Engine::VoiceCount() { |
998 |
return ActiveVoiceCount; |
999 |
} |
1000 |
|
1001 |
uint Engine::VoiceCountMax() { |
1002 |
return ActiveVoiceCountMax; |
1003 |
} |
1004 |
|
1005 |
bool Engine::DiskStreamSupported() { |
1006 |
return true; |
1007 |
} |
1008 |
|
1009 |
uint Engine::DiskStreamCount() { |
1010 |
return (pDiskThread) ? pDiskThread->ActiveStreamCount : 0; |
1011 |
} |
1012 |
|
1013 |
uint Engine::DiskStreamCountMax() { |
1014 |
return (pDiskThread) ? pDiskThread->ActiveStreamCountMax : 0; |
1015 |
} |
1016 |
|
1017 |
String Engine::DiskStreamBufferFillBytes() { |
1018 |
return pDiskThread->GetBufferFillBytes(); |
1019 |
} |
1020 |
|
1021 |
String Engine::DiskStreamBufferFillPercentage() { |
1022 |
return pDiskThread->GetBufferFillPercentage(); |
1023 |
} |
1024 |
|
1025 |
String Engine::EngineName() { |
1026 |
return "GigEngine"; |
1027 |
} |
1028 |
|
1029 |
String Engine::Description() { |
1030 |
return "Gigasampler Engine"; |
1031 |
} |
1032 |
|
1033 |
String Engine::Version() { |
1034 |
String s = "$Revision: 1.29 $"; |
1035 |
return s.substr(11, s.size() - 13); // cut dollar signs, spaces and CVS macro keyword |
1036 |
} |
1037 |
|
1038 |
}} // namespace LinuxSampler::gig |