1 |
/*************************************************************************** |
2 |
* * |
3 |
* LinuxSampler - modular, streaming capable sampler * |
4 |
* * |
5 |
* Copyright (C) 2003,2004 by Benno Senoner and Christian Schoenebeck * |
6 |
* Copyright (C) 2005-2008 Christian Schoenebeck * |
7 |
* Copyright (C) 2009-2012 Christian Schoenebeck and Grigor Iliev * |
8 |
* Copyright (C) 2012-2016 Christian Schoenebeck and Andreas Persson * |
9 |
* * |
10 |
* This program is free software; you can redistribute it and/or modify * |
11 |
* it under the terms of the GNU General Public License as published by * |
12 |
* the Free Software Foundation; either version 2 of the License, or * |
13 |
* (at your option) any later version. * |
14 |
* * |
15 |
* This program is distributed in the hope that it will be useful, * |
16 |
* but WITHOUT ANY WARRANTY; without even the implied warranty of * |
17 |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * |
18 |
* GNU General Public License for more details. * |
19 |
* * |
20 |
* You should have received a copy of the GNU General Public License * |
21 |
* along with this program; if not, write to the Free Software * |
22 |
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, * |
23 |
* MA 02111-1307 USA * |
24 |
***************************************************************************/ |
25 |
|
26 |
#ifndef __LS_ENGINECHANNELBASE_H__ |
27 |
#define __LS_ENGINECHANNELBASE_H__ |
28 |
|
29 |
#include "AbstractEngineChannel.h" |
30 |
#include "common/MidiKeyboardManager.h" |
31 |
#include "common/Voice.h" |
32 |
#include "../common/ResourceManager.h" |
33 |
|
34 |
namespace LinuxSampler { |
35 |
/// Command used by the instrument loader thread to |
36 |
/// request an instrument change on a channel. |
37 |
template <class R /* Region */, class I /* Instrument */> |
38 |
class InstrumentChangeCmd { |
39 |
public: |
40 |
bool bChangeInstrument; ///< Set to true by the loader when the channel should change instrument. |
41 |
I* pInstrument; ///< The new instrument. Also used by the loader to read the previously loaded instrument. |
42 |
RTList<R*>* pRegionsInUse; ///< List of dimension regions in use by the currently loaded instrument. Continuously updated by the audio thread. |
43 |
InstrumentScript* pScript; ///< Instrument script to be executed for this instrument. This is never NULL, it is always a valid InstrumentScript pointer. Use InstrumentScript::bHasValidScript whether it reflects a valid instrument script to be executed. |
44 |
}; |
45 |
|
46 |
template<class R> |
47 |
class RegionPools { |
48 |
public: |
49 |
virtual Pool<R*>* GetRegionPool(int index) = 0; |
50 |
}; |
51 |
|
52 |
template<class V> |
53 |
class NotePool { |
54 |
public: |
55 |
virtual Pool<V>* GetVoicePool() = 0; |
56 |
virtual Pool< Note<V> >* GetNotePool() = 0; |
57 |
virtual Pool<note_id_t>* GetNodeIDPool() = 0; |
58 |
}; |
59 |
|
60 |
template <class V /* Voice */, class R /* Region */, class I /* Instrument */> |
61 |
class EngineChannelBase: public AbstractEngineChannel, public MidiKeyboardManager<V>, public ResourceConsumer<I> { |
62 |
public: |
63 |
typedef typename RTList< Note<V> >::Iterator NoteIterator; |
64 |
typedef typename RTList<R*>::Iterator RTListRegionIterator; |
65 |
typedef typename MidiKeyboardManager<V>::MidiKey MidiKey; |
66 |
|
67 |
virtual MidiKeyboardManagerBase* GetMidiKeyboardManager() OVERRIDE { |
68 |
return this; |
69 |
} |
70 |
|
71 |
virtual void HandBack(I* Instrument) { |
72 |
ResourceManager<InstrumentManager::instrument_id_t, I>* mgr = |
73 |
dynamic_cast<ResourceManager<InstrumentManager::instrument_id_t, I>*>(pEngine->GetInstrumentManager()); |
74 |
mgr->HandBack(Instrument, this); |
75 |
} |
76 |
|
77 |
virtual void ClearRegionsInUse() { |
78 |
{ |
79 |
InstrumentChangeCmd<R, I>& cmd = InstrumentChangeCommand.GetConfigForUpdate(); |
80 |
if (cmd.pRegionsInUse) cmd.pRegionsInUse->clear(); |
81 |
cmd.bChangeInstrument = false; |
82 |
} |
83 |
{ |
84 |
InstrumentChangeCmd<R, I>& cmd = InstrumentChangeCommand.SwitchConfig(); |
85 |
if (cmd.pRegionsInUse) cmd.pRegionsInUse->clear(); |
86 |
cmd.bChangeInstrument = false; |
87 |
} |
88 |
} |
89 |
|
90 |
virtual void ResetRegionsInUse(Pool<R*>* pRegionPool[]) { |
91 |
DeleteRegionsInUse(); |
92 |
AllocateRegionsInUse(pRegionPool); |
93 |
} |
94 |
|
95 |
virtual void DeleteRegionsInUse() { |
96 |
RTList<R*>* previous = NULL; // prevent double free |
97 |
{ |
98 |
InstrumentChangeCmd<R, I>& cmd = InstrumentChangeCommand.GetConfigForUpdate(); |
99 |
if (cmd.pRegionsInUse) { |
100 |
previous = cmd.pRegionsInUse; |
101 |
delete cmd.pRegionsInUse; |
102 |
cmd.pRegionsInUse = NULL; |
103 |
} |
104 |
cmd.bChangeInstrument = false; |
105 |
} |
106 |
{ |
107 |
InstrumentChangeCmd<R, I>& cmd = InstrumentChangeCommand.SwitchConfig(); |
108 |
if (cmd.pRegionsInUse) { |
109 |
if (cmd.pRegionsInUse != previous) |
110 |
delete cmd.pRegionsInUse; |
111 |
cmd.pRegionsInUse = NULL; |
112 |
} |
113 |
cmd.bChangeInstrument = false; |
114 |
} |
115 |
} |
116 |
|
117 |
virtual void AllocateRegionsInUse(Pool<R*>* pRegionPool[]) { |
118 |
{ |
119 |
InstrumentChangeCmd<R, I>& cmd = InstrumentChangeCommand.GetConfigForUpdate(); |
120 |
cmd.pRegionsInUse = new RTList<R*>(pRegionPool[0]); |
121 |
cmd.bChangeInstrument = false; |
122 |
} |
123 |
{ |
124 |
InstrumentChangeCmd<R, I>& cmd = InstrumentChangeCommand.SwitchConfig(); |
125 |
cmd.pRegionsInUse = new RTList<R*>(pRegionPool[1]); |
126 |
cmd.bChangeInstrument = false; |
127 |
} |
128 |
} |
129 |
|
130 |
virtual void Connect(AudioOutputDevice* pAudioOut) OVERRIDE { |
131 |
if (pEngine) { |
132 |
if (pEngine->pAudioOutputDevice == pAudioOut) return; |
133 |
DisconnectAudioOutputDevice(); |
134 |
} |
135 |
AbstractEngine* newEngine = AbstractEngine::AcquireEngine(this, pAudioOut); |
136 |
{ |
137 |
LockGuard lock(EngineMutex); |
138 |
pEngine = newEngine; |
139 |
} |
140 |
ResetInternal(false/*don't reset engine*/); // 'false' is error prone here, but the danger of recursion with 'true' would be worse, there could be a better solution though |
141 |
pEvents = new RTList<Event>(pEngine->pEventPool); |
142 |
delayedEvents.pList = new RTList<Event>(pEngine->pEventPool); |
143 |
|
144 |
RegionPools<R>* pRegionPool = dynamic_cast<RegionPools<R>*>(pEngine); |
145 |
// reset the instrument change command struct (need to be done |
146 |
// twice, as it is double buffered) |
147 |
{ |
148 |
InstrumentChangeCmd<R, I>& cmd = InstrumentChangeCommand.GetConfigForUpdate(); |
149 |
cmd.pRegionsInUse = new RTList<R*>(pRegionPool->GetRegionPool(0)); |
150 |
cmd.pInstrument = 0; |
151 |
cmd.bChangeInstrument = false; |
152 |
} |
153 |
{ |
154 |
InstrumentChangeCmd<R, I>& cmd = InstrumentChangeCommand.SwitchConfig(); |
155 |
cmd.pRegionsInUse = new RTList<R*>(pRegionPool->GetRegionPool(1)); |
156 |
cmd.pInstrument = 0; |
157 |
cmd.bChangeInstrument = false; |
158 |
} |
159 |
|
160 |
if (pInstrument != NULL) { |
161 |
pInstrument = NULL; |
162 |
InstrumentStat = -1; |
163 |
InstrumentIdx = -1; |
164 |
InstrumentIdxName = ""; |
165 |
InstrumentFile = ""; |
166 |
bStatusChanged = true; |
167 |
} |
168 |
|
169 |
NotePool<V>* pNotePool = dynamic_cast<NotePool<V>*>(pEngine); |
170 |
MidiKeyboardManager<V>::AllocateActiveNotesLists( |
171 |
pNotePool->GetNotePool(), |
172 |
pNotePool->GetVoicePool() |
173 |
); |
174 |
MidiKeyboardManager<V>::AllocateEventsLists(pEngine->pEventPool); |
175 |
|
176 |
AudioDeviceChannelLeft = 0; |
177 |
AudioDeviceChannelRight = 1; |
178 |
if (fxSends.empty()) { // render directly into the AudioDevice's output buffers |
179 |
pChannelLeft = pAudioOut->Channel(AudioDeviceChannelLeft); |
180 |
pChannelRight = pAudioOut->Channel(AudioDeviceChannelRight); |
181 |
} else { // use local buffers for rendering and copy later |
182 |
// ensure the local buffers have the correct size |
183 |
if (pChannelLeft) delete pChannelLeft; |
184 |
if (pChannelRight) delete pChannelRight; |
185 |
pChannelLeft = new AudioChannel(0, pAudioOut->MaxSamplesPerCycle()); |
186 |
pChannelRight = new AudioChannel(1, pAudioOut->MaxSamplesPerCycle()); |
187 |
} |
188 |
if (pEngine->EngineDisabled.GetUnsafe()) pEngine->Enable(); |
189 |
MidiInputPort::AddSysexListener(pEngine); |
190 |
} |
191 |
|
192 |
virtual void DisconnectAudioOutputDevice() OVERRIDE { |
193 |
if (pEngine) { // if clause to prevent disconnect loops |
194 |
|
195 |
ResetInternal(false/*don't reset engine*/); // 'false' is error prone here, but the danger of recursion with 'true' would be worse, there could be a better solution though |
196 |
|
197 |
DeleteRegionsInUse(); |
198 |
UnloadScriptInUse(); |
199 |
|
200 |
InstrumentChangeCmd<R, I>& cmd = InstrumentChangeCommand.GetConfigForUpdate(); |
201 |
if (cmd.pInstrument) { |
202 |
// release the currently loaded instrument |
203 |
HandBack(cmd.pInstrument); |
204 |
} |
205 |
|
206 |
if (pEvents) { |
207 |
delete pEvents; |
208 |
pEvents = NULL; |
209 |
} |
210 |
if (delayedEvents.pList) { |
211 |
delete delayedEvents.pList; |
212 |
delayedEvents.pList = NULL; |
213 |
} |
214 |
|
215 |
MidiKeyboardManager<V>::DeleteActiveNotesLists(); |
216 |
MidiKeyboardManager<V>::DeleteEventsLists(); |
217 |
DeleteGroupEventLists(); |
218 |
|
219 |
AudioOutputDevice* oldAudioDevice = pEngine->pAudioOutputDevice; |
220 |
{ |
221 |
LockGuard lock(EngineMutex); |
222 |
pEngine = NULL; |
223 |
} |
224 |
AbstractEngine::FreeEngine(this, oldAudioDevice); |
225 |
AudioDeviceChannelLeft = -1; |
226 |
AudioDeviceChannelRight = -1; |
227 |
if (!fxSends.empty()) { // free the local rendering buffers |
228 |
if (pChannelLeft) delete pChannelLeft; |
229 |
if (pChannelRight) delete pChannelRight; |
230 |
} |
231 |
pChannelLeft = NULL; |
232 |
pChannelRight = NULL; |
233 |
} |
234 |
} |
235 |
|
236 |
class ClearEventListsHandler : public MidiKeyboardManager<V>::VoiceHandlerBase { |
237 |
public: |
238 |
virtual bool Process(MidiKey* pMidiKey) { pMidiKey->pEvents->clear(); return false; } |
239 |
}; |
240 |
|
241 |
/** |
242 |
* Free all events of the current audio fragment cycle. Calling |
243 |
* this method will @b NOT free events scheduled past the current |
244 |
* fragment's boundary! (@see AbstractEngineChannel::delayedEvents). |
245 |
*/ |
246 |
void ClearEventListsOfCurrentFragment() { |
247 |
pEvents->clear(); |
248 |
// empty MIDI key specific event lists |
249 |
ClearEventListsHandler handler; |
250 |
this->ProcessActiveVoices(&handler); |
251 |
|
252 |
// empty exclusive group specific event lists |
253 |
// (pInstrument == 0 could mean that LoadInstrument is |
254 |
// building new group event lists, so we must check |
255 |
// for that) |
256 |
if (pInstrument) ClearGroupEventLists(); |
257 |
} |
258 |
|
259 |
// implementation of abstract methods derived from interface class 'InstrumentConsumer' |
260 |
|
261 |
/** |
262 |
* Will be called by the InstrumentResourceManager when the instrument |
263 |
* we are currently using on this EngineChannel is going to be updated, |
264 |
* so we can stop playback before that happens. |
265 |
*/ |
266 |
virtual void ResourceToBeUpdated(I* pResource, void*& pUpdateArg) OVERRIDE { |
267 |
dmsg(3,("EngineChannelBase: Received instrument update message.\n")); |
268 |
if (pEngine) pEngine->DisableAndLock(); |
269 |
ResetInternal(false/*don't reset engine*/); |
270 |
this->pInstrument = NULL; |
271 |
} |
272 |
|
273 |
/** |
274 |
* Will be called by the InstrumentResourceManager when the instrument |
275 |
* update process was completed, so we can continue with playback. |
276 |
*/ |
277 |
virtual void ResourceUpdated(I* pOldResource, I* pNewResource, void* pUpdateArg) OVERRIDE { |
278 |
this->pInstrument = pNewResource; //TODO: there are couple of engine parameters we should update here as well if the instrument was updated (see LoadInstrument()) |
279 |
if (pEngine) pEngine->Enable(); |
280 |
bStatusChanged = true; // status of engine has changed, so set notify flag |
281 |
} |
282 |
|
283 |
/** |
284 |
* Will be called by the InstrumentResourceManager on progress changes |
285 |
* while loading or realoading an instrument for this EngineChannel. |
286 |
* |
287 |
* @param fProgress - current progress as value between 0.0 and 1.0 |
288 |
*/ |
289 |
virtual void OnResourceProgress(float fProgress) OVERRIDE { |
290 |
this->InstrumentStat = int(fProgress * 100.0f); |
291 |
dmsg(7,("EngineChannelBase: progress %d%%", InstrumentStat)); |
292 |
bStatusChanged = true; // status of engine has changed, so set notify flag |
293 |
} |
294 |
|
295 |
/** |
296 |
* Called on sustain pedal up events to check and if required, |
297 |
* launch release trigger voices on the respective active key. |
298 |
* |
299 |
* @param pEngineChannel - engine channel on which this event occurred on |
300 |
* @param itEvent - release trigger event (contains note number) |
301 |
*/ |
302 |
virtual void ProcessReleaseTrigger(RTList<Event>::Iterator& itEvent) OVERRIDE { |
303 |
if (!pEngine) return; |
304 |
pEngine->ProcessReleaseTrigger(this, itEvent); |
305 |
} |
306 |
|
307 |
void RenderActiveVoices(uint Samples) { |
308 |
RenderVoicesHandler handler(this, Samples); |
309 |
this->ProcessActiveVoices(&handler); |
310 |
|
311 |
SetVoiceCount(handler.VoiceCount); |
312 |
SetDiskStreamCount(handler.StreamCount); |
313 |
} |
314 |
|
315 |
/** |
316 |
* Called by real-time instrument script functions to schedule a |
317 |
* new note (new note-on event and a new @c Note object linked to it) |
318 |
* @a delay microseconds in future. |
319 |
* |
320 |
* @b IMPORTANT: for the supplied @a delay to be scheduled |
321 |
* correctly, the passed @a pEvent must be assigned a valid |
322 |
* fragment time within the current audio fragment boundaries. That |
323 |
* fragment time will be used by this method as basis for |
324 |
* interpreting what "now" acutally is, and thus it will be used as |
325 |
* basis for calculating the precise scheduling time for @a delay. |
326 |
* The easiest way to achieve this is by copying a recent event |
327 |
* which happened within the current audio fragment cycle: i.e. the |
328 |
* original event which caused calling this method here, or by using |
329 |
* Event::copyTimefrom() method to only copy the time, without any |
330 |
* other event data. |
331 |
* |
332 |
* @param pEvent - note-on event to be scheduled in future (event |
333 |
* data will be copied) |
334 |
* @param delay - amount of microseconds in future (from now) when |
335 |
* event shall be processed |
336 |
* @returns unique note ID of scheduled new note, or NULL on error |
337 |
*/ |
338 |
note_id_t ScheduleNoteMicroSec(const Event* pEvent, int delay) OVERRIDE { |
339 |
// add (copied) note-on event into scheduler queue |
340 |
const event_id_t noteOnEventID = ScheduleEventMicroSec(pEvent, delay); |
341 |
if (!noteOnEventID) return 0; // error |
342 |
// get access to (copied) event on the scheduler queue |
343 |
RTList<Event>::Iterator itEvent = pEvents->fromID(noteOnEventID); |
344 |
// stick a new note to the (copied) event on the queue |
345 |
const note_id_t noteID = pEngine->LaunchNewNote(this, &*itEvent); |
346 |
return noteID; |
347 |
} |
348 |
|
349 |
/** |
350 |
* Called by real-time instrument script functions to ignore the note |
351 |
* reflected by given note ID. The note's event will be freed immediately |
352 |
* to its event pool and this will prevent voices to be launched for the |
353 |
* note. |
354 |
* |
355 |
* NOTE: preventing a note by calling this method works only if the note |
356 |
* was launched within the current audio fragment cycle. |
357 |
* |
358 |
* @param id - unique ID of note to be dropped |
359 |
*/ |
360 |
void IgnoreNote(note_id_t id) OVERRIDE { |
361 |
Pool< Note<V> >* pNotePool = |
362 |
dynamic_cast<NotePool<V>*>(pEngine)->GetNotePool(); |
363 |
|
364 |
NoteIterator itNote = pNotePool->fromID(id); |
365 |
if (!itNote) return; // note probably already released |
366 |
|
367 |
// if the note already got active voices, then it is too late to drop it |
368 |
if (!itNote->pActiveVoices->isEmpty()) return; |
369 |
|
370 |
// if the original (note-on) event is not available anymore, then it is too late to drop it |
371 |
RTList<Event>::Iterator itEvent = pEvents->fromID(itNote->eventID); |
372 |
if (!itEvent) return; |
373 |
|
374 |
// drop the note |
375 |
pNotePool->free(itNote); |
376 |
|
377 |
// drop the original event |
378 |
pEvents->free(itEvent); |
379 |
} |
380 |
|
381 |
RTList<R*>* pRegionsInUse; ///< temporary pointer into the instrument change command, used by the audio thread |
382 |
I* pInstrument; |
383 |
|
384 |
template<class TV, class TRR, class TR, class TD, class TIM, class TI> friend class EngineBase; |
385 |
|
386 |
protected: |
387 |
EngineChannelBase() : |
388 |
MidiKeyboardManager<V>(this), |
389 |
InstrumentChangeCommandReader(InstrumentChangeCommand) |
390 |
{ |
391 |
pInstrument = NULL; |
392 |
|
393 |
// reset the instrument change command struct (need to be done |
394 |
// twice, as it is double buffered) |
395 |
{ |
396 |
InstrumentChangeCmd<R, I>& cmd = InstrumentChangeCommand.GetConfigForUpdate(); |
397 |
cmd.pRegionsInUse = NULL; |
398 |
cmd.pInstrument = NULL; |
399 |
cmd.pScript = new InstrumentScript(this); |
400 |
cmd.bChangeInstrument = false; |
401 |
} |
402 |
{ |
403 |
InstrumentChangeCmd<R, I>& cmd = InstrumentChangeCommand.SwitchConfig(); |
404 |
cmd.pRegionsInUse = NULL; |
405 |
cmd.pInstrument = NULL; |
406 |
cmd.pScript = new InstrumentScript(this); |
407 |
cmd.bChangeInstrument = false; |
408 |
} |
409 |
} |
410 |
|
411 |
virtual ~EngineChannelBase() { |
412 |
InstrumentScript* previous = NULL; // prevent double free |
413 |
{ |
414 |
InstrumentChangeCmd<R, I>& cmd = InstrumentChangeCommand.GetConfigForUpdate(); |
415 |
if (cmd.pScript) { |
416 |
previous = cmd.pScript; |
417 |
delete cmd.pScript; |
418 |
cmd.pScript = NULL; |
419 |
} |
420 |
} |
421 |
{ |
422 |
InstrumentChangeCmd<R, I>& cmd = InstrumentChangeCommand.SwitchConfig(); |
423 |
if (cmd.pScript) { |
424 |
if (previous != cmd.pScript) |
425 |
delete cmd.pScript; |
426 |
cmd.pScript = NULL; |
427 |
} |
428 |
} |
429 |
} |
430 |
|
431 |
typedef typename RTList<V>::Iterator RTListVoiceIterator; |
432 |
|
433 |
class RenderVoicesHandler : public MidiKeyboardManager<V>::VoiceHandlerBase { |
434 |
public: |
435 |
uint Samples; |
436 |
uint VoiceCount; |
437 |
uint StreamCount; |
438 |
EngineChannelBase<V, R, I>* pChannel; |
439 |
|
440 |
RenderVoicesHandler(EngineChannelBase<V, R, I>* channel, uint samples) : |
441 |
Samples(samples), VoiceCount(0), StreamCount(0), pChannel(channel) { } |
442 |
|
443 |
virtual void Process(RTListVoiceIterator& itVoice) { |
444 |
// now render current voice |
445 |
itVoice->Render(Samples); |
446 |
if (itVoice->IsActive()) { // still active |
447 |
if (!itVoice->Orphan) { |
448 |
*(pChannel->pRegionsInUse->allocAppend()) = itVoice->GetRegion(); |
449 |
} |
450 |
VoiceCount++; |
451 |
|
452 |
if (itVoice->PlaybackState == Voice::playback_state_disk) { |
453 |
if ((itVoice->DiskStreamRef).State != Stream::state_unused) StreamCount++; |
454 |
} |
455 |
} else { // voice reached end, is now inactive |
456 |
itVoice->VoiceFreed(); |
457 |
pChannel->FreeVoice(itVoice); // remove voice from the list of active voices |
458 |
} |
459 |
} |
460 |
}; |
461 |
|
462 |
typedef typename SynchronizedConfig<InstrumentChangeCmd<R, I> >::Reader SyncConfInstrChangeCmdReader; |
463 |
|
464 |
SynchronizedConfig<InstrumentChangeCmd<R, I> > InstrumentChangeCommand; |
465 |
SyncConfInstrChangeCmdReader InstrumentChangeCommandReader; |
466 |
|
467 |
/** This method is not thread safe! */ |
468 |
virtual void ResetInternal(bool bResetEngine) OVERRIDE { |
469 |
AbstractEngineChannel::ResetInternal(bResetEngine); |
470 |
|
471 |
MidiKeyboardManager<V>::Reset(); |
472 |
} |
473 |
|
474 |
virtual void ResetControllers() OVERRIDE { |
475 |
AbstractEngineChannel::ResetControllers(); |
476 |
|
477 |
MidiKeyboardManager<V>::SustainPedal = false; |
478 |
MidiKeyboardManager<V>::SostenutoPedal = false; |
479 |
} |
480 |
|
481 |
/** |
482 |
* Unload the currently used and loaded real-time instrument script. |
483 |
* The source code of the script is retained, so that it can still |
484 |
* be reloaded. |
485 |
*/ |
486 |
void UnloadScriptInUse() { |
487 |
{ |
488 |
InstrumentChangeCmd<R, I>& cmd = InstrumentChangeCommand.GetConfigForUpdate(); |
489 |
if (cmd.pScript) cmd.pScript->unload(); |
490 |
} |
491 |
{ |
492 |
InstrumentChangeCmd<R, I>& cmd = InstrumentChangeCommand.SwitchConfig(); |
493 |
if (cmd.pScript) cmd.pScript->unload(); |
494 |
} |
495 |
InstrumentChangeCommand.SwitchConfig(); // switch back to original one |
496 |
} |
497 |
|
498 |
/** |
499 |
* Load real-time instrument script and all its resources required |
500 |
* for the upcoming instrument change. |
501 |
* |
502 |
* @param text - source code of script |
503 |
*/ |
504 |
void LoadInstrumentScript(const String& text) { |
505 |
InstrumentChangeCmd<R, I>& cmd = InstrumentChangeCommand.GetConfigForUpdate(); |
506 |
// load the new script |
507 |
cmd.pScript->load(text); |
508 |
} |
509 |
|
510 |
/** |
511 |
* Changes the instrument for an engine channel. |
512 |
* |
513 |
* @param pInstrument - new instrument |
514 |
* @returns the resulting instrument change command after the |
515 |
* command switch, containing the old instrument and |
516 |
* the dimregions it is using |
517 |
*/ |
518 |
InstrumentChangeCmd<R, I>& ChangeInstrument(I* pInstrument) { |
519 |
InstrumentChangeCmd<R, I>& cmd = InstrumentChangeCommand.GetConfigForUpdate(); |
520 |
cmd.pInstrument = pInstrument; |
521 |
cmd.bChangeInstrument = true; |
522 |
|
523 |
return InstrumentChangeCommand.SwitchConfig(); |
524 |
} |
525 |
|
526 |
virtual void ProcessKeySwitchChange(int key) = 0; |
527 |
}; |
528 |
|
529 |
} // namespace LinuxSampler |
530 |
|
531 |
#endif /* __LS_ENGINECHANNELBASE_H__ */ |