/[svn]/linuxsampler/trunk/src/engines/gig/Engine.cpp
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revision 56 by schoenebeck, Tue Apr 27 09:21:58 2004 UTC revision 1037 by schoenebeck, Tue Jan 23 20:03:22 2007 UTC
# Line 2  Line 2 
2   *                                                                         *   *                                                                         *
3   *   LinuxSampler - modular, streaming capable sampler                     *   *   LinuxSampler - modular, streaming capable sampler                     *
4   *                                                                         *   *                                                                         *
5   *   Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck   *   *   Copyright (C) 2003,2004 by Benno Senoner and Christian Schoenebeck   *
6     *   Copyright (C) 2005-2007 Christian Schoenebeck                        *
7   *                                                                         *   *                                                                         *
8   *   This program is free software; you can redistribute it and/or modify  *   *   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  *   *   it under the terms of the GNU General Public License as published by  *
# Line 23  Line 24 
24  #include <sstream>  #include <sstream>
25  #include "DiskThread.h"  #include "DiskThread.h"
26  #include "Voice.h"  #include "Voice.h"
27    #include "EGADSR.h"
28    #include "../EngineFactory.h"
29    
30  #include "Engine.h"  #include "Engine.h"
31    
32  namespace LinuxSampler { namespace gig {  namespace LinuxSampler { namespace gig {
33    
34      InstrumentResourceManager Engine::Instruments;      InstrumentResourceManager Engine::instruments;
35    
36        std::map<AudioOutputDevice*,Engine*> Engine::engines;
37    
38        /**
39         * Get a gig::Engine object for the given gig::EngineChannel and the
40         * given AudioOutputDevice. All engine channels which are connected to
41         * the same audio output device will use the same engine instance. This
42         * method will be called by a gig::EngineChannel whenever it's
43         * connecting to a audio output device.
44         *
45         * @param pChannel - engine channel which acquires an engine object
46         * @param pDevice  - the audio output device \a pChannel is connected to
47         */
48        Engine* Engine::AcquireEngine(LinuxSampler::gig::EngineChannel* pChannel, AudioOutputDevice* pDevice) {
49            Engine* pEngine = NULL;
50            // check if there's already an engine for the given audio output device
51            if (engines.count(pDevice)) {
52                dmsg(4,("Using existing gig::Engine.\n"));
53                pEngine = engines[pDevice];
54            } else { // create a new engine (and disk thread) instance for the given audio output device
55                dmsg(4,("Creating new gig::Engine.\n"));
56                pEngine = (Engine*) EngineFactory::Create("gig");
57                pEngine->Connect(pDevice);
58                engines[pDevice] = pEngine;
59            }
60            // register engine channel to the engine instance
61            pEngine->engineChannels.add(pChannel);
62            // remember index in the ArrayList
63            pChannel->iEngineIndexSelf = pEngine->engineChannels.size() - 1;
64            dmsg(4,("This gig::Engine has now %d EngineChannels.\n",pEngine->engineChannels.size()));
65            return pEngine;
66        }
67    
68        /**
69         * Once an engine channel is disconnected from an audio output device,
70         * it wil immediately call this method to unregister itself from the
71         * engine instance and if that engine instance is not used by any other
72         * engine channel anymore, then that engine instance will be destroyed.
73         *
74         * @param pChannel - engine channel which wants to disconnect from it's
75         *                   engine instance
76         * @param pDevice  - audio output device \a pChannel was connected to
77         */
78        void Engine::FreeEngine(LinuxSampler::gig::EngineChannel* pChannel, AudioOutputDevice* pDevice) {
79            dmsg(4,("Disconnecting EngineChannel from gig::Engine.\n"));
80            Engine* pEngine = engines[pDevice];
81            // unregister EngineChannel from the Engine instance
82            pEngine->engineChannels.remove(pChannel);
83            // if the used Engine instance is not used anymore, then destroy it
84            if (pEngine->engineChannels.empty()) {
85                pDevice->Disconnect(pEngine);
86                engines.erase(pDevice);
87                delete pEngine;
88                dmsg(4,("Destroying gig::Engine.\n"));
89            }
90            else dmsg(4,("This gig::Engine has now %d EngineChannels.\n",pEngine->engineChannels.size()));
91        }
92    
93        /**
94         * Constructor
95         */
96      Engine::Engine() {      Engine::Engine() {
         pRIFF              = NULL;  
         pGig               = NULL;  
         pInstrument        = NULL;  
97          pAudioOutputDevice = NULL;          pAudioOutputDevice = NULL;
98          pDiskThread        = NULL;          pDiskThread        = NULL;
99          pEventGenerator    = NULL;          pEventGenerator    = NULL;
100          pEventQueue        = new RingBuffer<Event>(MAX_EVENTS_PER_FRAGMENT);          pSysexBuffer       = new RingBuffer<uint8_t,false>(CONFIG_SYSEX_BUFFER_SIZE, 0);
101          pEventPool         = new RTELMemoryPool<Event>(MAX_EVENTS_PER_FRAGMENT);          pEventQueue        = new RingBuffer<Event,false>(CONFIG_MAX_EVENTS_PER_FRAGMENT, 0);
102          pVoicePool         = new RTELMemoryPool<Voice>(MAX_AUDIO_VOICES);          pEventPool         = new Pool<Event>(CONFIG_MAX_EVENTS_PER_FRAGMENT);
103          pActiveKeys        = new RTELMemoryPool<uint>(128);          pVoicePool         = new Pool<Voice>(CONFIG_MAX_VOICES);
104          pEvents            = new RTEList<Event>(pEventPool);          pVoiceStealingQueue = new RTList<Event>(pEventPool);
105          pCCEvents          = new RTEList<Event>(pEventPool);          pGlobalEvents      = new RTList<Event>(pEventPool);
106          for (uint i = 0; i < Event::destination_count; i++) {          for (RTList<Voice>::Iterator iterVoice = pVoicePool->allocAppend(); iterVoice == pVoicePool->last(); iterVoice = pVoicePool->allocAppend()) {
107              pSynthesisEvents[i] = new RTEList<Event>(pEventPool);              iterVoice->SetEngine(this);
         }  
         for (uint i = 0; i < 128; i++) {  
             pMIDIKeyInfo[i].pActiveVoices = new RTEList<Voice>(pVoicePool);  
             pMIDIKeyInfo[i].KeyPressed    = false;  
             pMIDIKeyInfo[i].Active        = false;  
             pMIDIKeyInfo[i].pSelf         = NULL;  
             pMIDIKeyInfo[i].pEvents       = new RTEList<Event>(pEventPool);  
         }  
         for (Voice* pVoice = pVoicePool->alloc(); pVoice; pVoice = pVoicePool->alloc()) {  
             pVoice->SetEngine(this);  
108          }          }
109          pVoicePool->clear();          pVoicePool->clear();
110    
         pSynthesisParameters[0] = NULL; // we allocate when an audio device is connected  
   
111          ResetInternal();          ResetInternal();
112            ResetScaleTuning();
113      }      }
114    
115        /**
116         * Destructor
117         */
118      Engine::~Engine() {      Engine::~Engine() {
119            MidiInputPort::RemoveSysexListener(this);
120          if (pDiskThread) {          if (pDiskThread) {
121                dmsg(1,("Stopping disk thread..."));
122              pDiskThread->StopThread();              pDiskThread->StopThread();
123              delete pDiskThread;              delete pDiskThread;
124                dmsg(1,("OK\n"));
125          }          }
         if (pGig)  delete pGig;  
         if (pRIFF) delete pRIFF;  
         for (uint i = 0; i < 128; i++) {  
             if (pMIDIKeyInfo[i].pActiveVoices) delete pMIDIKeyInfo[i].pActiveVoices;  
             if (pMIDIKeyInfo[i].pEvents)       delete pMIDIKeyInfo[i].pEvents;  
         }  
         for (uint i = 0; i < Event::destination_count; i++) {  
             if (pSynthesisEvents[i]) delete pSynthesisEvents[i];  
         }  
         delete[] pSynthesisEvents;  
         if (pEvents)     delete pEvents;  
         if (pCCEvents)   delete pCCEvents;  
126          if (pEventQueue) delete pEventQueue;          if (pEventQueue) delete pEventQueue;
127          if (pEventPool)  delete pEventPool;          if (pEventPool)  delete pEventPool;
128          if (pVoicePool)  delete pVoicePool;          if (pVoicePool) {
129          if (pActiveKeys) delete pActiveKeys;              pVoicePool->clear();
130                delete pVoicePool;
131            }
132          if (pEventGenerator) delete pEventGenerator;          if (pEventGenerator) delete pEventGenerator;
133          if (pSynthesisParameters[0]) delete[] pSynthesisParameters[0];          if (pVoiceStealingQueue) delete pVoiceStealingQueue;
134            if (pSysexBuffer) delete pSysexBuffer;
135            Unregister();
136      }      }
137    
138      void Engine::Enable() {      void Engine::Enable() {
139          dmsg(3,("gig::Engine: enabling\n"));          dmsg(3,("gig::Engine: enabling\n"));
140          EngineDisabled.PushAndUnlock(false, 2); // set condition object 'EngineDisabled' to false (wait max. 2s)          EngineDisabled.PushAndUnlock(false, 2); // set condition object 'EngineDisabled' to false (wait max. 2s)
141          dmsg(1,("gig::Engine: enabled (val=%d)\n", EngineDisabled.GetUnsafe()));          dmsg(3,("gig::Engine: enabled (val=%d)\n", EngineDisabled.GetUnsafe()));
142      }      }
143    
144      void Engine::Disable() {      void Engine::Disable() {
# Line 112  namespace LinuxSampler { namespace gig { Line 159  namespace LinuxSampler { namespace gig {
159       */       */
160      void Engine::Reset() {      void Engine::Reset() {
161          DisableAndLock();          DisableAndLock();
   
         //if (pAudioOutputDevice->IsPlaying()) { // if already running  
             /*  
             // signal audio thread not to enter render part anymore  
             SuspensionRequested = true;  
             // sleep until wakened by audio thread  
             pthread_mutex_lock(&__render_state_mutex);  
             pthread_cond_wait(&__render_exit_condition, &__render_state_mutex);  
             pthread_mutex_unlock(&__render_state_mutex);  
             */  
         //}  
   
         //if (wasplaying) pAudioOutputDevice->Stop();  
   
162          ResetInternal();          ResetInternal();
163            ResetScaleTuning();
         // signal audio thread to continue with rendering  
         //SuspensionRequested = false;  
164          Enable();          Enable();
165      }      }
166    
167      /**      /**
168       *  Reset all voices and disk thread and clear input event queue and all       *  Reset all voices and disk thread and clear input event queue and all
169       *  control and status variables. This method is not thread safe!       *  control and status variables. This method is protected by a mutex.
170       */       */
171      void Engine::ResetInternal() {      void Engine::ResetInternal() {
172          Pitch               = 0;          ResetInternalMutex.Lock();
173          SustainPedal        = false;  
174            // make sure that the engine does not get any sysex messages
175            // while it's reseting
176            bool sysexDisabled = MidiInputPort::RemoveSysexListener(this);
177          ActiveVoiceCount    = 0;          ActiveVoiceCount    = 0;
178          ActiveVoiceCountMax = 0;          ActiveVoiceCountMax = 0;
179    
180          // set all MIDI controller values to zero          // reset voice stealing parameters
181          memset(ControllerTable, 0x00, 128);          pVoiceStealingQueue->clear();
182            itLastStolenVoice          = RTList<Voice>::Iterator();
183          // reset key info          itLastStolenVoiceGlobally  = RTList<Voice>::Iterator();
184          for (uint i = 0; i < 128; i++) {          iuiLastStolenKey           = RTList<uint>::Iterator();
185              pMIDIKeyInfo[i].pActiveVoices->clear();          iuiLastStolenKeyGlobally   = RTList<uint>::Iterator();
186              pMIDIKeyInfo[i].pEvents->clear();          pLastStolenChannel         = NULL;
             pMIDIKeyInfo[i].KeyPressed = false;  
             pMIDIKeyInfo[i].Active     = false;  
             pMIDIKeyInfo[i].pSelf      = NULL;  
         }  
187    
188          // reset all voices          // reset all voices
189          for (Voice* pVoice = pVoicePool->alloc(); pVoice; pVoice = pVoicePool->alloc()) {          for (RTList<Voice>::Iterator iterVoice = pVoicePool->allocAppend(); iterVoice == pVoicePool->last(); iterVoice = pVoicePool->allocAppend()) {
190              pVoice->Reset();              iterVoice->Reset();
191          }          }
192          pVoicePool->clear();          pVoicePool->clear();
193    
         // free all active keys  
         pActiveKeys->clear();  
   
194          // reset disk thread          // reset disk thread
195          if (pDiskThread) pDiskThread->Reset();          if (pDiskThread) pDiskThread->Reset();
196    
197          // delete all input events          // delete all input events
198          pEventQueue->init();          pEventQueue->init();
199            pSysexBuffer->init();
200            if (sysexDisabled) MidiInputPort::AddSysexListener(this);
201            ResetInternalMutex.Unlock();
202      }      }
203    
204      /**      /**
205       *  Load an instrument from a .gig file.       * Reset to normal, chromatic scale (means equal tempered).
      *  
      *  @param FileName   - file name of the Gigasampler instrument file  
      *  @param Instrument - index of the instrument in the .gig file  
      *  @throws LinuxSamplerException  on error  
      *  @returns          detailed description of the method call result  
      */  
     void Engine::LoadInstrument(const char* FileName, uint Instrument) {  
   
         DisableAndLock();  
   
         ResetInternal(); // reset engine  
   
         // free old instrument  
         if (pInstrument) {  
             // give old instrument back to instrument manager  
             Instruments.HandBack(pInstrument, this);  
         }  
   
         // request gig instrument from instrument manager  
         try {  
             instrument_id_t instrid;  
             instrid.FileName    = FileName;  
             instrid.iInstrument = Instrument;  
             pInstrument = Instruments.Borrow(instrid, this);  
             if (!pInstrument) {  
                 dmsg(1,("no instrument loaded!!!\n"));  
                 exit(EXIT_FAILURE);  
             }  
         }  
         catch (RIFF::Exception e) {  
             String msg = "gig::Engine error: Failed to load instrument, cause: " + e.Message;  
             throw LinuxSamplerException(msg);  
         }  
         catch (InstrumentResourceManagerException e) {  
             String msg = "gig::Engine error: Failed to load instrument, cause: " + e.Message();  
             throw LinuxSamplerException(msg);  
         }  
         catch (...) {  
             throw LinuxSamplerException("gig::Engine error: Failed to load instrument, cause: Unknown exception while trying to parse gig file.");  
         }  
   
         // inform audio driver for the need of two channels  
         try {  
             if (pAudioOutputDevice) pAudioOutputDevice->AcquireChannels(2); // gig Engine only stereo  
         }  
         catch (AudioOutputException e) {  
             String msg = "Audio output device unable to provide 2 audio channels, cause: " + e.Message();  
             throw LinuxSamplerException(msg);  
         }  
   
         Enable();  
     }  
   
     /**  
      * Will be called by the InstrumentResourceManager when the instrument  
      * we are currently using in this engine is going to be updated, so we  
      * can stop playback before that happens.  
206       */       */
207      void Engine::ResourceToBeUpdated(::gig::Instrument* pResource, void*& pUpdateArg) {      void Engine::ResetScaleTuning() {
208          dmsg(3,("gig::Engine: Received instrument update message.\n"));          memset(&ScaleTuning[0], 0x00, 12);
         DisableAndLock();  
         ResetInternal();  
         this->pInstrument = NULL;  
209      }      }
210    
211      /**      /**
212       * Will be called by the InstrumentResourceManager when the instrument       * Connect this engine instance with the given audio output device.
213       * update process was completed, so we can continue with playback.       * This method will be called when an Engine instance is created.
214         * All of the engine's data structures which are dependant to the used
215         * audio output device / driver will be (re)allocated and / or
216         * adjusted appropriately.
217         *
218         * @param pAudioOut - audio output device to connect to
219       */       */
     void Engine::ResourceUpdated(::gig::Instrument* pOldResource, ::gig::Instrument* pNewResource, void* pUpdateArg) {  
         this->pInstrument = pNewResource;  
         Enable();  
     }  
   
220      void Engine::Connect(AudioOutputDevice* pAudioOut) {      void Engine::Connect(AudioOutputDevice* pAudioOut) {
221          pAudioOutputDevice = pAudioOut;          pAudioOutputDevice = pAudioOut;
222    
# Line 258  namespace LinuxSampler { namespace gig { Line 228  namespace LinuxSampler { namespace gig {
228          }          }
229          catch (AudioOutputException e) {          catch (AudioOutputException e) {
230              String msg = "Audio output device unable to provide 2 audio channels, cause: " + e.Message();              String msg = "Audio output device unable to provide 2 audio channels, cause: " + e.Message();
231              throw LinuxSamplerException(msg);              throw Exception(msg);
232            }
233    
234            this->MaxSamplesPerCycle = pAudioOutputDevice->MaxSamplesPerCycle();
235            this->SampleRate         = pAudioOutputDevice->SampleRate();
236    
237            // FIXME: audio drivers with varying fragment sizes might be a problem here
238            MaxFadeOutPos = MaxSamplesPerCycle - int(double(SampleRate) * CONFIG_EG_MIN_RELEASE_TIME) - 1;
239            if (MaxFadeOutPos < 0) {
240                std::cerr << "gig::Engine: WARNING, CONFIG_EG_MIN_RELEASE_TIME "
241                          << "too big for current audio fragment size & sampling rate! "
242                          << "May lead to click sounds if voice stealing chimes in!\n" << std::flush;
243                // force volume ramp downs at the beginning of each fragment
244                MaxFadeOutPos = 0;
245                // lower minimum release time
246                const float minReleaseTime = (float) MaxSamplesPerCycle / (float) SampleRate;
247                for (RTList<Voice>::Iterator iterVoice = pVoicePool->allocAppend(); iterVoice == pVoicePool->last(); iterVoice = pVoicePool->allocAppend()) {
248                    iterVoice->EG1.CalculateFadeOutCoeff(minReleaseTime, SampleRate);
249                }
250                pVoicePool->clear();
251          }          }
252    
253          // (re)create disk thread          // (re)create disk thread
254          if (this->pDiskThread) {          if (this->pDiskThread) {
255                dmsg(1,("Stopping disk thread..."));
256              this->pDiskThread->StopThread();              this->pDiskThread->StopThread();
257              delete this->pDiskThread;              delete this->pDiskThread;
258                dmsg(1,("OK\n"));
259          }          }
260          this->pDiskThread = new DiskThread(((pAudioOut->MaxSamplesPerCycle() << MAX_PITCH) << 1) + 6); //FIXME: assuming stereo          this->pDiskThread = new DiskThread(((pAudioOut->MaxSamplesPerCycle() << CONFIG_MAX_PITCH) << 1) + 6); //FIXME: assuming stereo
261          if (!pDiskThread) {          if (!pDiskThread) {
262              dmsg(0,("gig::Engine  new diskthread = NULL\n"));              dmsg(0,("gig::Engine  new diskthread = NULL\n"));
263              exit(EXIT_FAILURE);              exit(EXIT_FAILURE);
264          }          }
265    
266          for (Voice* pVoice = pVoicePool->alloc(); pVoice; pVoice = pVoicePool->alloc()) {          for (RTList<Voice>::Iterator iterVoice = pVoicePool->allocAppend(); iterVoice == pVoicePool->last(); iterVoice = pVoicePool->allocAppend()) {
267              pVoice->pDiskThread = this->pDiskThread;              iterVoice->pDiskThread = this->pDiskThread;
             pVoice->SetOutput(pAudioOut);  
268              dmsg(3,("d"));              dmsg(3,("d"));
269          }          }
270          pVoicePool->clear();          pVoicePool->clear();
# Line 283  namespace LinuxSampler { namespace gig { Line 273  namespace LinuxSampler { namespace gig {
273          if (pEventGenerator) delete pEventGenerator;          if (pEventGenerator) delete pEventGenerator;
274          pEventGenerator = new EventGenerator(pAudioOut->SampleRate());          pEventGenerator = new EventGenerator(pAudioOut->SampleRate());
275    
         // (re)allocate synthesis parameter matrix  
         if (pSynthesisParameters[0]) delete[] pSynthesisParameters[0];  
         pSynthesisParameters[0] = new float[Event::destination_count * pAudioOut->MaxSamplesPerCycle()];  
         for (int dst = 1; dst < Event::destination_count; dst++)  
             pSynthesisParameters[dst] = pSynthesisParameters[dst - 1] + pAudioOut->MaxSamplesPerCycle();  
   
276          dmsg(1,("Starting disk thread..."));          dmsg(1,("Starting disk thread..."));
277          pDiskThread->StartThread();          pDiskThread->StartThread();
278          dmsg(1,("OK\n"));          dmsg(1,("OK\n"));
279    
280          for (Voice* pVoice = pVoicePool->first(); pVoice; pVoice = pVoicePool->next()) {          for (RTList<Voice>::Iterator iterVoice = pVoicePool->allocAppend(); iterVoice == pVoicePool->last(); iterVoice = pVoicePool->allocAppend()) {
281              if (!pVoice->pDiskThread) {              if (!iterVoice->pDiskThread) {
282                  dmsg(0,("Engine -> voice::trigger: !pDiskThread\n"));                  dmsg(0,("Engine -> voice::trigger: !pDiskThread\n"));
283                  exit(EXIT_FAILURE);                  exit(EXIT_FAILURE);
284              }              }
285          }          }
286      }      }
287    
288      void Engine::DisconnectAudioOutputDevice() {      /**
289          if (pAudioOutputDevice) { // if clause to prevent disconnect loops       * Clear all engine global event lists.
290              AudioOutputDevice* olddevice = pAudioOutputDevice;       */
291              pAudioOutputDevice = NULL;      void Engine::ClearEventLists() {
292              olddevice->Disconnect(this);          pGlobalEvents->clear();
293        }
294    
295        /**
296         * Copy all events from the engine's global input queue buffer to the
297         * engine's internal event list. This will be done at the beginning of
298         * each audio cycle (that is each RenderAudio() call) to distinguish
299         * all global events which have to be processed in the current audio
300         * cycle. These events are usually just SysEx messages. Every
301         * EngineChannel has it's own input event queue buffer and event list
302         * to handle common events like NoteOn, NoteOff and ControlChange
303         * events.
304         *
305         * @param Samples - number of sample points to be processed in the
306         *                  current audio cycle
307         */
308        void Engine::ImportEvents(uint Samples) {
309            RingBuffer<Event,false>::NonVolatileReader eventQueueReader = pEventQueue->get_non_volatile_reader();
310            Event* pEvent;
311            while (true) {
312                // get next event from input event queue
313                if (!(pEvent = eventQueueReader.pop())) break;
314                // if younger event reached, ignore that and all subsequent ones for now
315                if (pEvent->FragmentPos() >= Samples) {
316                    eventQueueReader--;
317                    dmsg(2,("Younger Event, pos=%d ,Samples=%d!\n",pEvent->FragmentPos(),Samples));
318                    pEvent->ResetFragmentPos();
319                    break;
320                }
321                // copy event to internal event list
322                if (pGlobalEvents->poolIsEmpty()) {
323                    dmsg(1,("Event pool emtpy!\n"));
324                    break;
325                }
326                *pGlobalEvents->allocAppend() = *pEvent;
327          }          }
328            eventQueueReader.free(); // free all copied events from input queue
329      }      }
330    
331      /**      /**
332       *  Let this engine proceed to render the given amount of sample points. The       * Let this engine proceed to render the given amount of sample points.
333       *  calculated audio data of all voices of this engine will be placed into       * The engine will iterate through all engine channels and render audio
334       *  the engine's audio sum buffer which has to be copied and eventually be       * for each engine channel independently. The calculated audio data of
335       *  converted to the appropriate value range by the audio output class (e.g.       * all voices of each engine channel will be placed into the audio sum
336       *  AlsaIO or JackIO) right after.       * buffers of the respective audio output device, connected to the
337         * respective engine channel.
338       *       *
339       *  @param Samples - number of sample points to be rendered       *  @param Samples - number of sample points to be rendered
340       *  @returns       0 on success       *  @returns       0 on success
341       */       */
342      int Engine::RenderAudio(uint Samples) {      int Engine::RenderAudio(uint Samples) {
343          dmsg(5,("RenderAudio(Samples=%d)\n", Samples));          dmsg(7,("RenderAudio(Samples=%d)\n", Samples));
344    
345          // return if no instrument loaded or engine disabled          // return if engine disabled
346          if (EngineDisabled.Pop()) {          if (EngineDisabled.Pop()) {
347              dmsg(5,("gig::Engine: engine disabled (val=%d)\n",EngineDisabled.GetUnsafe()));              dmsg(5,("gig::Engine: engine disabled (val=%d)\n",EngineDisabled.GetUnsafe()));
348              return 0;              return 0;
349          }          }
350          if (!pInstrument) {  
351              dmsg(5,("gig::Engine: no instrument loaded\n"));          // update time of start and end of this audio fragment (as events' time stamps relate to this)
352              return 0;          pEventGenerator->UpdateFragmentTime(Samples);
353    
354            // We only allow a maximum of CONFIG_MAX_VOICES voices to be spawned
355            // in each audio fragment. All subsequent request for spawning new
356            // voices in the same audio fragment will be ignored.
357            VoiceSpawnsLeft = CONFIG_MAX_VOICES;
358    
359            // get all events from the engine's global input event queue which belong to the current fragment
360            // (these are usually just SysEx messages)
361            ImportEvents(Samples);
362    
363            // process engine global events (these are currently only MIDI System Exclusive messages)
364            {
365                RTList<Event>::Iterator itEvent = pGlobalEvents->first();
366                RTList<Event>::Iterator end     = pGlobalEvents->end();
367                for (; itEvent != end; ++itEvent) {
368                    switch (itEvent->Type) {
369                        case Event::type_sysex:
370                            dmsg(5,("Engine: Sysex received\n"));
371                            ProcessSysex(itEvent);
372                            break;
373                    }
374                }
375          }          }
376    
377            // reset internal voice counter (just for statistic of active voices)
378            ActiveVoiceCountTemp = 0;
379    
380          // empty the event lists for the new fragment          // handle events on all engine channels
381          pEvents->clear();          for (int i = 0; i < engineChannels.size(); i++) {
382          pCCEvents->clear();              if (!engineChannels[i]->pInstrument) continue; // ignore if no instrument loaded
383          for (uint i = 0; i < Event::destination_count; i++) {              ProcessEvents(engineChannels[i], Samples);
             pSynthesisEvents[i]->clear();  
384          }          }
385    
386          // read and copy events from input queue          // render all 'normal', active voices on all engine channels
387          Event event = pEventGenerator->CreateEvent();          for (int i = 0; i < engineChannels.size(); i++) {
388          while (true) {              if (!engineChannels[i]->pInstrument) continue; // ignore if no instrument loaded
389              if (!pEventQueue->pop(&event)) break;              RenderActiveVoices(engineChannels[i], Samples);
             pEvents->alloc_assign(event);  
390          }          }
391    
392            // now that all ordinary voices on ALL engine channels are rendered, render new stolen voices
393            RenderStolenVoices(Samples);
394    
395          // update time of start and end of this audio fragment (as events' time stamps relate to this)          // handle audio routing for engine channels with FX sends
396          pEventGenerator->UpdateFragmentTime(Samples);          for (int i = 0; i < engineChannels.size(); i++) {
397                if (engineChannels[i]->fxSends.empty()) continue; // ignore if no FX sends
398                RouteAudio(engineChannels[i], Samples);
399            }
400    
401            // handle cleanup on all engine channels for the next audio fragment
402            for (int i = 0; i < engineChannels.size(); i++) {
403                if (!engineChannels[i]->pInstrument) continue; // ignore if no instrument loaded
404                PostProcess(engineChannels[i]);
405            }
406    
407    
408            // empty the engine's event list for the next audio fragment
409            ClearEventLists();
410    
411            // reset voice stealing for the next audio fragment
412            pVoiceStealingQueue->clear();
413    
414            // just some statistics about this engine instance
415            ActiveVoiceCount = ActiveVoiceCountTemp;
416            if (ActiveVoiceCount > ActiveVoiceCountMax) ActiveVoiceCountMax = ActiveVoiceCount;
417    
418            FrameTime += Samples;
419    
420            return 0;
421        }
422    
423        /**
424         * Dispatch and handle all events in this audio fragment for the given
425         * engine channel.
426         *
427         * @param pEngineChannel - engine channel on which events should be
428         *                         processed
429         * @param Samples        - amount of sample points to be processed in
430         *                         this audio fragment cycle
431         */
432        void Engine::ProcessEvents(EngineChannel* pEngineChannel, uint Samples) {
433            // get all events from the engine channels's input event queue which belong to the current fragment
434            // (these are the common events like NoteOn, NoteOff, ControlChange, etc.)
435            pEngineChannel->ImportEvents(Samples);
436    
437          // process events          // process events
438          Event* pNextEvent = pEvents->first();          {
439          while (pNextEvent) {              RTList<Event>::Iterator itEvent = pEngineChannel->pEvents->first();
440              Event* pEvent = pNextEvent;              RTList<Event>::Iterator end     = pEngineChannel->pEvents->end();
441              pEvents->set_current(pEvent);              for (; itEvent != end; ++itEvent) {
442              pNextEvent = pEvents->next();                  switch (itEvent->Type) {
443              switch (pEvent->Type) {                      case Event::type_note_on:
444                  case Event::type_note_on:                          dmsg(5,("Engine: Note on received\n"));
445                      dmsg(5,("Audio Thread: Note on received\n"));                          ProcessNoteOn((EngineChannel*)itEvent->pEngineChannel, itEvent);
446                      ProcessNoteOn(pEvent);                          break;
447                      break;                      case Event::type_note_off:
448                  case Event::type_note_off:                          dmsg(5,("Engine: Note off received\n"));
449                      dmsg(5,("Audio Thread: Note off received\n"));                          ProcessNoteOff((EngineChannel*)itEvent->pEngineChannel, itEvent);
450                      ProcessNoteOff(pEvent);                          break;
451                      break;                      case Event::type_control_change:
452                  case Event::type_control_change:                          dmsg(5,("Engine: MIDI CC received\n"));
453                      dmsg(5,("Audio Thread: MIDI CC received\n"));                          ProcessControlChange((EngineChannel*)itEvent->pEngineChannel, itEvent);
454                      ProcessControlChange(pEvent);                          break;
455                      break;                      case Event::type_pitchbend:
456                  case Event::type_pitchbend:                          dmsg(5,("Engine: Pitchbend received\n"));
457                      dmsg(5,("Audio Thread: Pitchbend received\n"));                          ProcessPitchbend((EngineChannel*)itEvent->pEngineChannel, itEvent);
458                      ProcessPitchbend(pEvent);                          break;
459                      break;                  }
460              }              }
461          }          }
462    
463            // reset voice stealing for the next engine channel (or next audio fragment)
464            itLastStolenVoice         = RTList<Voice>::Iterator();
465            itLastStolenVoiceGlobally = RTList<Voice>::Iterator();
466            iuiLastStolenKey          = RTList<uint>::Iterator();
467            iuiLastStolenKeyGlobally  = RTList<uint>::Iterator();
468            pLastStolenChannel        = NULL;
469        }
470    
471          // render audio from all active voices      /**
472          int active_voices = 0;       * Render all 'normal' voices (that is voices which were not stolen in
473          uint* piKey = pActiveKeys->first();       * this fragment) on the given engine channel.
474          while (piKey) { // iterate through all active keys       *
475              midi_key_info_t* pKey = &pMIDIKeyInfo[*piKey];       * @param pEngineChannel - engine channel on which audio should be
476              pActiveKeys->set_current(piKey);       *                         rendered
477              piKey = pActiveKeys->next();       * @param Samples        - amount of sample points to be rendered in
478         *                         this audio fragment cycle
479              Voice* pVoiceNext = pKey->pActiveVoices->first();       */
480              while (pVoiceNext) { // iterate through all voices on this key      void Engine::RenderActiveVoices(EngineChannel* pEngineChannel, uint Samples) {
481                  // already get next voice on key          #if !CONFIG_PROCESS_MUTED_CHANNELS
482                  Voice* pVoice = pVoiceNext;          if (pEngineChannel->GetMute()) return; // skip if sampler channel is muted
483                  pKey->pActiveVoices->set_current(pVoice);          #endif
484                  pVoiceNext = pKey->pActiveVoices->next();  
485            RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();
486            RTList<uint>::Iterator end    = pEngineChannel->pActiveKeys->end();
487            while (iuiKey != end) { // iterate through all active keys
488                midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];
489                ++iuiKey;
490    
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                  // now render current voice                  // now render current voice
495                  pVoice->Render(Samples);                  itVoice->Render(Samples);
496                  if (pVoice->IsActive()) active_voices++; // still active                  if (itVoice->IsActive()) ActiveVoiceCountTemp++; // still active
497                  else { // voice reached end, is now inactive                  else { // voice reached end, is now inactive
498                      KillVoice(pVoice); // remove voice from the list of active voices                      FreeVoice(pEngineChannel, itVoice); // remove voice from the list of active voices
499                  }                  }
500              }              }
             pKey->pEvents->clear(); // free all events on the key  
501          }          }
   
   
         // write that to the disk thread class so that it can print it  
         // on the console for debugging purposes  
         ActiveVoiceCount = active_voices;  
         if (ActiveVoiceCount > ActiveVoiceCountMax) ActiveVoiceCountMax = ActiveVoiceCount;  
   
   
         return 0;  
502      }      }
503    
504      /**      /**
505       *  Will be called by the MIDIIn Thread to let the audio thread trigger a new       * Render all stolen voices (only voices which were stolen in this
506       *  voice for the given key.       * fragment) on the given engine channel. Stolen voices are rendered
507         * after all normal voices have been rendered; this is needed to render
508         * audio of those voices which were selected for voice stealing until
509         * the point were the stealing (that is the take over of the voice)
510         * actually happened.
511       *       *
512       *  @param Key      - MIDI key number of the triggered key       * @param pEngineChannel - engine channel on which audio should be
513       *  @param Velocity - MIDI velocity value of the triggered key       *                         rendered
514         * @param Samples        - amount of sample points to be rendered in
515         *                         this audio fragment cycle
516       */       */
517      void Engine::SendNoteOn(uint8_t Key, uint8_t Velocity) {      void Engine::RenderStolenVoices(uint Samples) {
518          Event event    = pEventGenerator->CreateEvent();          RTList<Event>::Iterator itVoiceStealEvent = pVoiceStealingQueue->first();
519          event.Type     = Event::type_note_on;          RTList<Event>::Iterator end               = pVoiceStealingQueue->end();
520          event.Key      = Key;          for (; itVoiceStealEvent != end; ++itVoiceStealEvent) {
521          event.Velocity = Velocity;              EngineChannel* pEngineChannel = (EngineChannel*) itVoiceStealEvent->pEngineChannel;
522          if (this->pEventQueue->write_space() > 0) this->pEventQueue->push(&event);              Pool<Voice>::Iterator itNewVoice =
523          else dmsg(1,("Engine: Input event queue full!"));                  LaunchVoice(pEngineChannel, itVoiceStealEvent, itVoiceStealEvent->Param.Note.Layer, itVoiceStealEvent->Param.Note.ReleaseTrigger, false, false);
524                if (itNewVoice) {
525                    itNewVoice->Render(Samples);
526                    if (itNewVoice->IsActive()) ActiveVoiceCountTemp++; // still active
527                    else { // voice reached end, is now inactive
528                        FreeVoice(pEngineChannel, itNewVoice); // remove voice from the list of active voices
529                    }
530                }
531                else dmsg(1,("gig::Engine: ERROR, voice stealing didn't work out!\n"));
532    
533                // we need to clear the key's event list explicitly here in case key was never active
534                midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[itVoiceStealEvent->Param.Note.Key];
535                pKey->VoiceTheftsQueued--;
536                if (!pKey->Active && !pKey->VoiceTheftsQueued) pKey->pEvents->clear();
537            }
538      }      }
539    
540      /**      /**
541       *  Will be called by the MIDIIn Thread to signal the audio thread to release       * Will be called in case the respective engine channel sports FX send
542       *  voice(s) on the given key.       * channels. In this particular case, engine channel local buffers are
543         * used to render and mix all voices to. This method is responsible for
544         * copying the audio data from those local buffers to the master audio
545         * output channels as well as to the FX send audio output channels with
546         * their respective FX send levels.
547       *       *
548       *  @param Key      - MIDI key number of the released key       * @param pEngineChannel - engine channel from which audio should be
549       *  @param Velocity - MIDI release velocity value of the released key       *                         routed
550         * @param Samples        - amount of sample points to be routed in
551         *                         this audio fragment cycle
552       */       */
553      void Engine::SendNoteOff(uint8_t Key, uint8_t Velocity) {      void Engine::RouteAudio(EngineChannel* pEngineChannel, uint Samples) {
554          Event event    = pEventGenerator->CreateEvent();          // route master signal
555          event.Type     = Event::type_note_off;          {
556          event.Key      = Key;              AudioChannel* pDstL = pAudioOutputDevice->Channel(pEngineChannel->AudioDeviceChannelLeft);
557          event.Velocity = Velocity;              AudioChannel* pDstR = pAudioOutputDevice->Channel(pEngineChannel->AudioDeviceChannelRight);
558          if (this->pEventQueue->write_space() > 0) this->pEventQueue->push(&event);              pEngineChannel->pChannelLeft->MixTo(pDstL, Samples);
559          else dmsg(1,("Engine: Input event queue full!"));              pEngineChannel->pChannelRight->MixTo(pDstR, Samples);
560            }
561            // route FX send signal
562            {
563                for (int iFxSend = 0; iFxSend < pEngineChannel->GetFxSendCount(); iFxSend++) {
564                    FxSend* pFxSend = pEngineChannel->GetFxSend(iFxSend);
565                    // left channel
566                    const int iDstL = pFxSend->DestinationChannel(0);
567                    if (iDstL < 0) {
568                        dmsg(1,("Engine::RouteAudio() Error: invalid FX send (L) destination channel"));
569                    } else {
570                        AudioChannel* pDstL = pAudioOutputDevice->Channel(iDstL);
571                        if (!pDstL) {
572                            dmsg(1,("Engine::RouteAudio() Error: invalid FX send (L) destination channel"));
573                        } else pEngineChannel->pChannelLeft->MixTo(pDstL, Samples, pFxSend->Level());
574                    }
575                    // right channel
576                    const int iDstR = pFxSend->DestinationChannel(1);
577                    if (iDstR < 0) {
578                        dmsg(1,("Engine::RouteAudio() Error: invalid FX send (R) destination channel"));
579                    } else {
580                        AudioChannel* pDstR = pAudioOutputDevice->Channel(iDstR);
581                        if (!pDstR) {
582                            dmsg(1,("Engine::RouteAudio() Error: invalid FX send (R) destination channel"));
583                        } else pEngineChannel->pChannelRight->MixTo(pDstR, Samples, pFxSend->Level());
584                    }
585                }
586            }
587            // reset buffers with silence (zero out) for the next audio cycle
588            pEngineChannel->pChannelLeft->Clear();
589            pEngineChannel->pChannelRight->Clear();
590      }      }
591    
592      /**      /**
593       *  Will be called by the MIDIIn Thread to signal the audio thread to change       * Free all keys which have turned inactive in this audio fragment, from
594       *  the pitch value for all voices.       * the list of active keys and clear all event lists on that engine
595         * channel.
596       *       *
597       *  @param Pitch - MIDI pitch value (-8192 ... +8191)       * @param pEngineChannel - engine channel to cleanup
598       */       */
599      void Engine::SendPitchbend(int Pitch) {      void Engine::PostProcess(EngineChannel* pEngineChannel) {
600          Event event = pEventGenerator->CreateEvent();          // free all keys which have no active voices left
601          event.Type  = Event::type_pitchbend;          {
602          event.Pitch = Pitch;              RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();
603          if (this->pEventQueue->write_space() > 0) this->pEventQueue->push(&event);              RTList<uint>::Iterator end    = pEngineChannel->pActiveKeys->end();
604          else dmsg(1,("Engine: Input event queue full!"));              while (iuiKey != end) { // iterate through all active keys
605                    midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];
606                    ++iuiKey;
607                    if (pKey->pActiveVoices->isEmpty()) FreeKey(pEngineChannel, pKey);
608                    #if CONFIG_DEVMODE
609                    else { // just a sanity check for debugging
610                        RTList<Voice>::Iterator itVoice     = pKey->pActiveVoices->first();
611                        RTList<Voice>::Iterator itVoicesEnd = pKey->pActiveVoices->end();
612                        for (; itVoice != itVoicesEnd; ++itVoice) { // iterate through all voices on this key
613                            if (itVoice->itKillEvent) {
614                                dmsg(1,("gig::Engine: ERROR, killed voice survived !!!\n"));
615                            }
616                        }
617                    }
618                    #endif // CONFIG_DEVMODE
619                }
620            }
621    
622            // empty the engine channel's own event lists
623            pEngineChannel->ClearEventLists();
624      }      }
625    
626      /**      /**
627       *  Will be called by the MIDIIn Thread to signal the audio thread that a       *  Will be called by the MIDI input device whenever a MIDI system
628       *  continuous controller value has changed.       *  exclusive message has arrived.
629       *       *
630       *  @param Controller - MIDI controller number of the occured control change       *  @param pData - pointer to sysex data
631       *  @param Value      - value of the control change       *  @param Size  - lenght of sysex data (in bytes)
632       */       */
633      void Engine::SendControlChange(uint8_t Controller, uint8_t Value) {      void Engine::SendSysex(void* pData, uint Size) {
634          Event event      = pEventGenerator->CreateEvent();          Event event             = pEventGenerator->CreateEvent();
635          event.Type       = Event::type_control_change;          event.Type              = Event::type_sysex;
636          event.Controller = Controller;          event.Param.Sysex.Size  = Size;
637          event.Value      = Value;          event.pEngineChannel    = NULL; // as Engine global event
638          if (this->pEventQueue->write_space() > 0) this->pEventQueue->push(&event);          if (pEventQueue->write_space() > 0) {
639                if (pSysexBuffer->write_space() >= Size) {
640                    // copy sysex data to input buffer
641                    uint toWrite = Size;
642                    uint8_t* pPos = (uint8_t*) pData;
643                    while (toWrite) {
644                        const uint writeNow = RTMath::Min(toWrite, pSysexBuffer->write_space_to_end());
645                        pSysexBuffer->write(pPos, writeNow);
646                        toWrite -= writeNow;
647                        pPos    += writeNow;
648    
649                    }
650                    // finally place sysex event into input event queue
651                    pEventQueue->push(&event);
652                }
653                else dmsg(1,("Engine: Sysex message too large (%d byte) for input buffer (%d byte)!",Size,CONFIG_SYSEX_BUFFER_SIZE));
654            }
655          else dmsg(1,("Engine: Input event queue full!"));          else dmsg(1,("Engine: Input event queue full!"));
656      }      }
657    
658      /**      /**
659       *  Assigns and triggers a new voice for the respective MIDI key.       *  Assigns and triggers a new voice for the respective MIDI key.
660       *       *
661       *  @param pNoteOnEvent - key, velocity and time stamp of the event       *  @param pEngineChannel - engine channel on which this event occured on
662         *  @param itNoteOnEvent - key, velocity and time stamp of the event
663       */       */
664      void Engine::ProcessNoteOn(Event* pNoteOnEvent) {      void Engine::ProcessNoteOn(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOnEvent) {
665          midi_key_info_t* pKey = &pMIDIKeyInfo[pNoteOnEvent->Key];          #if !CONFIG_PROCESS_MUTED_CHANNELS
666            if (pEngineChannel->GetMute()) return; // skip if sampler channel is muted
667            #endif
668    
669            const int key = itNoteOnEvent->Param.Note.Key;
670            midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[key];
671    
672            // move note on event to the key's own event list
673            RTList<Event>::Iterator itNoteOnEventOnKeyList = itNoteOnEvent.moveToEndOf(pKey->pEvents);
674    
675            // if Solo Mode then kill all already active voices
676            if (pEngineChannel->SoloMode) {
677                Pool<uint>::Iterator itYoungestKey = pEngineChannel->pActiveKeys->last();
678                if (itYoungestKey) {
679                    const int iYoungestKey = *itYoungestKey;
680                    const midi_key_info_t* pOtherKey = &pEngineChannel->pMIDIKeyInfo[iYoungestKey];
681                    if (pOtherKey->Active) {
682                        // get final portamento position of currently active voice
683                        if (pEngineChannel->PortamentoMode) {
684                            RTList<Voice>::Iterator itVoice = pOtherKey->pActiveVoices->last();
685                            if (itVoice) itVoice->UpdatePortamentoPos(itNoteOnEventOnKeyList);
686                        }
687                        // kill all voices on the (other) key
688                        RTList<Voice>::Iterator itVoiceToBeKilled = pOtherKey->pActiveVoices->first();
689                        RTList<Voice>::Iterator end               = pOtherKey->pActiveVoices->end();
690                        for (; itVoiceToBeKilled != end; ++itVoiceToBeKilled) {
691                            if (itVoiceToBeKilled->Type != Voice::type_release_trigger)
692                                itVoiceToBeKilled->Kill(itNoteOnEventOnKeyList);
693                        }
694                    }
695                }
696                // set this key as 'currently active solo key'
697                pEngineChannel->SoloKey = key;
698            }
699    
700            // Change key dimension value if key is in keyswitching area
701            {
702                const ::gig::Instrument* pInstrument = pEngineChannel->pInstrument;
703                if (key >= pInstrument->DimensionKeyRange.low && key <= pInstrument->DimensionKeyRange.high)
704                    pEngineChannel->CurrentKeyDimension = float(key - pInstrument->DimensionKeyRange.low) /
705                        (pInstrument->DimensionKeyRange.high - pInstrument->DimensionKeyRange.low + 1);
706            }
707    
708          pKey->KeyPressed = true; // the MIDI key was now pressed down          pKey->KeyPressed = true; // the MIDI key was now pressed down
709            pKey->Velocity   = itNoteOnEventOnKeyList->Param.Note.Velocity;
710            pKey->NoteOnTime = FrameTime + itNoteOnEventOnKeyList->FragmentPos(); // will be used to calculate note length
711    
712          // cancel release process of voices on this key if needed          // cancel release process of voices on this key if needed
713          if (pKey->Active && !SustainPedal) {          if (pKey->Active && !pEngineChannel->SustainPedal) {
714              pNoteOnEvent->Type = Event::type_cancel_release; // transform event type              RTList<Event>::Iterator itCancelReleaseEvent = pKey->pEvents->allocAppend();
715              pEvents->move(pNoteOnEvent, pKey->pEvents); // move event to the key's own event list              if (itCancelReleaseEvent) {
716                    *itCancelReleaseEvent = *itNoteOnEventOnKeyList;         // copy event
717                    itCancelReleaseEvent->Type = Event::type_cancel_release; // transform event type
718                }
719                else dmsg(1,("Event pool emtpy!\n"));
720          }          }
721    
722          // allocate a new voice for the key          // allocate and trigger new voice(s) for the key
723          Voice* pNewVoice = pKey->pActiveVoices->alloc();          {
724          if (pNewVoice) {              // first, get total amount of required voices (dependant on amount of layers)
725              // launch the new voice              ::gig::Region* pRegion = pEngineChannel->pInstrument->GetRegion(itNoteOnEventOnKeyList->Param.Note.Key);
726              if (pNewVoice->Trigger(pNoteOnEvent, this->Pitch, this->pInstrument) < 0) {              if (pRegion) {
727                  dmsg(1,("Triggering new voice failed!\n"));                  int voicesRequired = pRegion->Layers;
728                  pKey->pActiveVoices->free(pNewVoice);                  // now launch the required amount of voices
729              }                  for (int i = 0; i < voicesRequired; i++)
730              else if (!pKey->Active) { // mark as active key                      LaunchVoice(pEngineChannel, itNoteOnEventOnKeyList, i, false, true, true);
                 pKey->Active = true;  
                 pKey->pSelf  = pActiveKeys->alloc();  
                 *pKey->pSelf = pNoteOnEvent->Key;  
731              }              }
732          }          }
733          else std::cerr << "No free voice!" << std::endl << std::flush;  
734            // if neither a voice was spawned or postponed then remove note on event from key again
735            if (!pKey->Active && !pKey->VoiceTheftsQueued)
736                pKey->pEvents->free(itNoteOnEventOnKeyList);
737    
738            if (!pEngineChannel->SoloMode || pEngineChannel->PortamentoPos < 0.0f) pEngineChannel->PortamentoPos = (float) key;
739            pKey->RoundRobinIndex++;
740      }      }
741    
742      /**      /**
# Line 515  namespace LinuxSampler { namespace gig { Line 745  namespace LinuxSampler { namespace gig {
745       *  sustain pedal will be released or voice turned inactive by itself (e.g.       *  sustain pedal will be released or voice turned inactive by itself (e.g.
746       *  due to completion of sample playback).       *  due to completion of sample playback).
747       *       *
748       *  @param pNoteOffEvent - key, velocity and time stamp of the event       *  @param pEngineChannel - engine channel on which this event occured on
749         *  @param itNoteOffEvent - key, velocity and time stamp of the event
750       */       */
751      void Engine::ProcessNoteOff(Event* pNoteOffEvent) {      void Engine::ProcessNoteOff(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOffEvent) {
752          midi_key_info_t* pKey = &pMIDIKeyInfo[pNoteOffEvent->Key];          #if !CONFIG_PROCESS_MUTED_CHANNELS
753            if (pEngineChannel->GetMute()) return; // skip if sampler channel is muted
754            #endif
755    
756            const int iKey = itNoteOffEvent->Param.Note.Key;
757            midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[iKey];
758          pKey->KeyPressed = false; // the MIDI key was now released          pKey->KeyPressed = false; // the MIDI key was now released
759    
760          // release voices on this key if needed          // move event to the key's own event list
761          if (pKey->Active && !SustainPedal) {          RTList<Event>::Iterator itNoteOffEventOnKeyList = itNoteOffEvent.moveToEndOf(pKey->pEvents);
762              pNoteOffEvent->Type = Event::type_release; // transform event type  
763              pEvents->move(pNoteOffEvent, pKey->pEvents); // move event to the key's own event list          bool bShouldRelease = pKey->Active && ShouldReleaseVoice(pEngineChannel, itNoteOffEventOnKeyList->Param.Note.Key);
764    
765            // in case Solo Mode is enabled, kill all voices on this key and respawn a voice on the highest pressed key (if any)
766            if (pEngineChannel->SoloMode) { //TODO: this feels like too much code just for handling solo mode :P
767                bool bOtherKeysPressed = false;
768                if (iKey == pEngineChannel->SoloKey) {
769                    pEngineChannel->SoloKey = -1;
770                    // if there's still a key pressed down, respawn a voice (group) on the highest key
771                    for (int i = 127; i > 0; i--) {
772                        midi_key_info_t* pOtherKey = &pEngineChannel->pMIDIKeyInfo[i];
773                        if (pOtherKey->KeyPressed) {
774                            bOtherKeysPressed = true;
775                            // make the other key the new 'currently active solo key'
776                            pEngineChannel->SoloKey = i;
777                            // get final portamento position of currently active voice
778                            if (pEngineChannel->PortamentoMode) {
779                                RTList<Voice>::Iterator itVoice = pKey->pActiveVoices->first();
780                                if (itVoice) itVoice->UpdatePortamentoPos(itNoteOffEventOnKeyList);
781                            }
782                            // create a pseudo note on event
783                            RTList<Event>::Iterator itPseudoNoteOnEvent = pOtherKey->pEvents->allocAppend();
784                            if (itPseudoNoteOnEvent) {
785                                // copy event
786                                *itPseudoNoteOnEvent = *itNoteOffEventOnKeyList;
787                                // transform event to a note on event
788                                itPseudoNoteOnEvent->Type                = Event::type_note_on;
789                                itPseudoNoteOnEvent->Param.Note.Key      = i;
790                                itPseudoNoteOnEvent->Param.Note.Velocity = pOtherKey->Velocity;
791                                // allocate and trigger new voice(s) for the other key
792                                {
793                                    // first, get total amount of required voices (dependant on amount of layers)
794                                    ::gig::Region* pRegion = pEngineChannel->pInstrument->GetRegion(i);
795                                    if (pRegion) {
796                                        int voicesRequired = pRegion->Layers;
797                                        // now launch the required amount of voices
798                                        for (int iLayer = 0; iLayer < voicesRequired; iLayer++)
799                                            LaunchVoice(pEngineChannel, itPseudoNoteOnEvent, iLayer, false, true, false);
800                                    }
801                                }
802                                // if neither a voice was spawned or postponed then remove note on event from key again
803                                if (!pOtherKey->Active && !pOtherKey->VoiceTheftsQueued)
804                                    pOtherKey->pEvents->free(itPseudoNoteOnEvent);
805    
806                            } else dmsg(1,("Could not respawn voice, no free event left\n"));
807                            break; // done
808                        }
809                    }
810                }
811                if (bOtherKeysPressed) {
812                    if (pKey->Active) { // kill all voices on this key
813                        bShouldRelease = false; // no need to release, as we kill it here
814                        RTList<Voice>::Iterator itVoiceToBeKilled = pKey->pActiveVoices->first();
815                        RTList<Voice>::Iterator end               = pKey->pActiveVoices->end();
816                        for (; itVoiceToBeKilled != end; ++itVoiceToBeKilled) {
817                            if (itVoiceToBeKilled->Type != Voice::type_release_trigger)
818                                itVoiceToBeKilled->Kill(itNoteOffEventOnKeyList);
819                        }
820                    }
821                } else pEngineChannel->PortamentoPos = -1.0f;
822          }          }
823    
824            // if no solo mode (the usual case) or if solo mode and no other key pressed, then release voices on this key if needed
825            if (bShouldRelease) {
826                itNoteOffEventOnKeyList->Type = Event::type_release; // transform event type
827    
828                // spawn release triggered voice(s) if needed
829                if (pKey->ReleaseTrigger) {
830                    // first, get total amount of required voices (dependant on amount of layers)
831                    ::gig::Region* pRegion = pEngineChannel->pInstrument->GetRegion(itNoteOffEventOnKeyList->Param.Note.Key);
832                    if (pRegion) {
833                        int voicesRequired = pRegion->Layers;
834    
835                        // MIDI note-on velocity is used instead of note-off velocity
836                        itNoteOffEventOnKeyList->Param.Note.Velocity = pKey->Velocity;
837    
838                        // now launch the required amount of voices
839                        for (int i = 0; i < voicesRequired; i++)
840                            LaunchVoice(pEngineChannel, itNoteOffEventOnKeyList, i, true, false, false); //FIXME: for the moment we don't perform voice stealing for release triggered samples
841                    }
842                    pKey->ReleaseTrigger = false;
843                }
844            }
845    
846            // if neither a voice was spawned or postponed on this key then remove note off event from key again
847            if (!pKey->Active && !pKey->VoiceTheftsQueued)
848                pKey->pEvents->free(itNoteOffEventOnKeyList);
849      }      }
850    
851      /**      /**
852       *  Moves pitchbend event from the general (input) event list to the pitch       *  Moves pitchbend event from the general (input) event list to the engine
853       *  event list.       *  channel's event list. It will actually processed later by the
854         *  respective voice.
855       *       *
856       *  @param pPitchbendEvent - absolute pitch value and time stamp of the event       *  @param pEngineChannel - engine channel on which this event occured on
857         *  @param itPitchbendEvent - absolute pitch value and time stamp of the event
858       */       */
859      void Engine::ProcessPitchbend(Event* pPitchbendEvent) {      void Engine::ProcessPitchbend(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itPitchbendEvent) {
860          this->Pitch = pPitchbendEvent->Pitch; // store current pitch value          pEngineChannel->Pitch = itPitchbendEvent->Param.Pitch.Pitch; // store current pitch value
         pEvents->move(pPitchbendEvent, pSynthesisEvents[Event::destination_vco]);  
861      }      }
862    
863      /**      /**
864       *  Immediately kills the voice given with pVoice (no matter if sustain is       *  Allocates and triggers a new voice. This method will usually be
865       *  pressed or not) and removes it from the MIDI key's list of active voice.       *  called by the ProcessNoteOn() method and by the voices itself
866       *  This method will e.g. be called if a voice went inactive by itself.       *  (e.g. to spawn further voices on the same key for layered sounds).
867       *       *
868       *  @param pVoice - points to the voice to be killed       *  @param pEngineChannel      - engine channel on which this event occured on
869         *  @param itNoteOnEvent       - key, velocity and time stamp of the event
870         *  @param iLayer              - layer index for the new voice (optional - only
871         *                               in case of layered sounds of course)
872         *  @param ReleaseTriggerVoice - if new voice is a release triggered voice
873         *                               (optional, default = false)
874         *  @param VoiceStealing       - if voice stealing should be performed
875         *                               when there is no free voice
876         *                               (optional, default = true)
877         *  @param HandleKeyGroupConflicts - if voices should be killed due to a
878         *                                   key group conflict
879         *  @returns pointer to new voice or NULL if there was no free voice or
880         *           if the voice wasn't triggered (for example when no region is
881         *           defined for the given key).
882       */       */
883      void Engine::KillVoice(Voice* pVoice) {      Pool<Voice>::Iterator Engine::LaunchVoice(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOnEvent, int iLayer, bool ReleaseTriggerVoice, bool VoiceStealing, bool HandleKeyGroupConflicts) {
884          if (pVoice) {          int MIDIKey            = itNoteOnEvent->Param.Note.Key;
885              if (pVoice->IsActive()) pVoice->Kill();          midi_key_info_t* pKey  = &pEngineChannel->pMIDIKeyInfo[MIDIKey];
886            ::gig::Region* pRegion = pEngineChannel->pInstrument->GetRegion(MIDIKey);
887    
888            // if nothing defined for this key
889            if (!pRegion) return Pool<Voice>::Iterator(); // nothing to do
890    
891            // only mark the first voice of a layered voice (group) to be in a
892            // key group, so the layered voices won't kill each other
893            int iKeyGroup = (iLayer == 0 && !ReleaseTriggerVoice) ? pRegion->KeyGroup : 0;
894    
895            // handle key group (a.k.a. exclusive group) conflicts
896            if (HandleKeyGroupConflicts) {
897                if (iKeyGroup) { // if this voice / key belongs to a key group
898                    uint** ppKeyGroup = &pEngineChannel->ActiveKeyGroups[iKeyGroup];
899                    if (*ppKeyGroup) { // if there's already an active key in that key group
900                        midi_key_info_t* pOtherKey = &pEngineChannel->pMIDIKeyInfo[**ppKeyGroup];
901                        // kill all voices on the (other) key
902                        RTList<Voice>::Iterator itVoiceToBeKilled = pOtherKey->pActiveVoices->first();
903                        RTList<Voice>::Iterator end               = pOtherKey->pActiveVoices->end();
904                        for (; itVoiceToBeKilled != end; ++itVoiceToBeKilled) {
905                            if (itVoiceToBeKilled->Type != Voice::type_release_trigger) {
906                                itVoiceToBeKilled->Kill(itNoteOnEvent);
907                                --VoiceSpawnsLeft; //FIXME: just a hack, we should better check in StealVoice() if the voice was killed due to key conflict
908                            }
909                        }
910                    }
911                }
912            }
913    
914              midi_key_info_t* pKey = &pMIDIKeyInfo[pVoice->MIDIKey];          Voice::type_t VoiceType = Voice::type_normal;
915    
916            // get current dimension values to select the right dimension region
917            //TODO: for stolen voices this dimension region selection block is processed twice, this should be changed
918            //FIXME: controller values for selecting the dimension region here are currently not sample accurate
919            uint DimValues[8] = { 0 };
920            for (int i = pRegion->Dimensions - 1; i >= 0; i--) {
921                switch (pRegion->pDimensionDefinitions[i].dimension) {
922                    case ::gig::dimension_samplechannel:
923                        DimValues[i] = 0; //TODO: we currently ignore this dimension
924                        break;
925                    case ::gig::dimension_layer:
926                        DimValues[i] = iLayer;
927                        break;
928                    case ::gig::dimension_velocity:
929                        DimValues[i] = itNoteOnEvent->Param.Note.Velocity;
930                        break;
931                    case ::gig::dimension_channelaftertouch:
932                        DimValues[i] = pEngineChannel->ControllerTable[128];
933                        break;
934                    case ::gig::dimension_releasetrigger:
935                        VoiceType = (ReleaseTriggerVoice) ? Voice::type_release_trigger : (!iLayer) ? Voice::type_release_trigger_required : Voice::type_normal;
936                        DimValues[i] = (uint) ReleaseTriggerVoice;
937                        break;
938                    case ::gig::dimension_keyboard:
939                        DimValues[i] = (uint) (pEngineChannel->CurrentKeyDimension * pRegion->pDimensionDefinitions[i].zones);
940                        break;
941                    case ::gig::dimension_roundrobin:
942                        DimValues[i] = (uint) pEngineChannel->pMIDIKeyInfo[MIDIKey].RoundRobinIndex; // incremented for each note on
943                        break;
944                    case ::gig::dimension_random:
945                        RandomSeed   = RandomSeed * 1103515245 + 12345; // classic pseudo random number generator
946                        DimValues[i] = (uint) RandomSeed >> (32 - pRegion->pDimensionDefinitions[i].bits); // highest bits are most random
947                        break;
948                    case ::gig::dimension_modwheel:
949                        DimValues[i] = pEngineChannel->ControllerTable[1];
950                        break;
951                    case ::gig::dimension_breath:
952                        DimValues[i] = pEngineChannel->ControllerTable[2];
953                        break;
954                    case ::gig::dimension_foot:
955                        DimValues[i] = pEngineChannel->ControllerTable[4];
956                        break;
957                    case ::gig::dimension_portamentotime:
958                        DimValues[i] = pEngineChannel->ControllerTable[5];
959                        break;
960                    case ::gig::dimension_effect1:
961                        DimValues[i] = pEngineChannel->ControllerTable[12];
962                        break;
963                    case ::gig::dimension_effect2:
964                        DimValues[i] = pEngineChannel->ControllerTable[13];
965                        break;
966                    case ::gig::dimension_genpurpose1:
967                        DimValues[i] = pEngineChannel->ControllerTable[16];
968                        break;
969                    case ::gig::dimension_genpurpose2:
970                        DimValues[i] = pEngineChannel->ControllerTable[17];
971                        break;
972                    case ::gig::dimension_genpurpose3:
973                        DimValues[i] = pEngineChannel->ControllerTable[18];
974                        break;
975                    case ::gig::dimension_genpurpose4:
976                        DimValues[i] = pEngineChannel->ControllerTable[19];
977                        break;
978                    case ::gig::dimension_sustainpedal:
979                        DimValues[i] = pEngineChannel->ControllerTable[64];
980                        break;
981                    case ::gig::dimension_portamento:
982                        DimValues[i] = pEngineChannel->ControllerTable[65];
983                        break;
984                    case ::gig::dimension_sostenutopedal:
985                        DimValues[i] = pEngineChannel->ControllerTable[66];
986                        break;
987                    case ::gig::dimension_softpedal:
988                        DimValues[i] = pEngineChannel->ControllerTable[67];
989                        break;
990                    case ::gig::dimension_genpurpose5:
991                        DimValues[i] = pEngineChannel->ControllerTable[80];
992                        break;
993                    case ::gig::dimension_genpurpose6:
994                        DimValues[i] = pEngineChannel->ControllerTable[81];
995                        break;
996                    case ::gig::dimension_genpurpose7:
997                        DimValues[i] = pEngineChannel->ControllerTable[82];
998                        break;
999                    case ::gig::dimension_genpurpose8:
1000                        DimValues[i] = pEngineChannel->ControllerTable[83];
1001                        break;
1002                    case ::gig::dimension_effect1depth:
1003                        DimValues[i] = pEngineChannel->ControllerTable[91];
1004                        break;
1005                    case ::gig::dimension_effect2depth:
1006                        DimValues[i] = pEngineChannel->ControllerTable[92];
1007                        break;
1008                    case ::gig::dimension_effect3depth:
1009                        DimValues[i] = pEngineChannel->ControllerTable[93];
1010                        break;
1011                    case ::gig::dimension_effect4depth:
1012                        DimValues[i] = pEngineChannel->ControllerTable[94];
1013                        break;
1014                    case ::gig::dimension_effect5depth:
1015                        DimValues[i] = pEngineChannel->ControllerTable[95];
1016                        break;
1017                    case ::gig::dimension_none:
1018                        std::cerr << "gig::Engine::LaunchVoice() Error: dimension=none\n" << std::flush;
1019                        break;
1020                    default:
1021                        std::cerr << "gig::Engine::LaunchVoice() Error: Unknown dimension\n" << std::flush;
1022                }
1023            }
1024            ::gig::DimensionRegion* pDimRgn = pRegion->GetDimensionRegionByValue(DimValues);
1025    
1026            // no need to continue if sample is silent
1027            if (!pDimRgn->pSample || !pDimRgn->pSample->SamplesTotal) return Pool<Voice>::Iterator();
1028    
1029            // allocate a new voice for the key
1030            Pool<Voice>::Iterator itNewVoice = pKey->pActiveVoices->allocAppend();
1031            if (itNewVoice) {
1032                // launch the new voice
1033                if (itNewVoice->Trigger(pEngineChannel, itNoteOnEvent, pEngineChannel->Pitch, pDimRgn, VoiceType, iKeyGroup) < 0) {
1034                    dmsg(4,("Voice not triggered\n"));
1035                    pKey->pActiveVoices->free(itNewVoice);
1036                }
1037                else { // on success
1038                    --VoiceSpawnsLeft;
1039                    if (!pKey->Active) { // mark as active key
1040                        pKey->Active = true;
1041                        pKey->itSelf = pEngineChannel->pActiveKeys->allocAppend();
1042                        *pKey->itSelf = itNoteOnEvent->Param.Note.Key;
1043                    }
1044                    if (itNewVoice->KeyGroup) {
1045                        uint** ppKeyGroup = &pEngineChannel->ActiveKeyGroups[itNewVoice->KeyGroup];
1046                        *ppKeyGroup = &*pKey->itSelf; // put key as the (new) active key to its key group
1047                    }
1048                    if (itNewVoice->Type == Voice::type_release_trigger_required) pKey->ReleaseTrigger = true; // mark key for the need of release triggered voice(s)
1049                    return itNewVoice; // success
1050                }
1051            }
1052            else if (VoiceStealing) {
1053                // try to steal one voice
1054                int result = StealVoice(pEngineChannel, itNoteOnEvent);
1055                if (!result) { // voice stolen successfully
1056                    // put note-on event into voice-stealing queue, so it will be reprocessed after killed voice died
1057                    RTList<Event>::Iterator itStealEvent = pVoiceStealingQueue->allocAppend();
1058                    if (itStealEvent) {
1059                        *itStealEvent = *itNoteOnEvent; // copy event
1060                        itStealEvent->Param.Note.Layer = iLayer;
1061                        itStealEvent->Param.Note.ReleaseTrigger = ReleaseTriggerVoice;
1062                        pKey->VoiceTheftsQueued++;
1063                    }
1064                    else dmsg(1,("Voice stealing queue full!\n"));
1065                }
1066            }
1067    
1068            return Pool<Voice>::Iterator(); // no free voice or error
1069        }
1070    
1071        /**
1072         *  Will be called by LaunchVoice() method in case there are no free
1073         *  voices left. This method will select and kill one old voice for
1074         *  voice stealing and postpone the note-on event until the selected
1075         *  voice actually died.
1076         *
1077         *  @param pEngineChannel - engine channel on which this event occured on
1078         *  @param itNoteOnEvent - key, velocity and time stamp of the event
1079         *  @returns 0 on success, a value < 0 if no active voice could be picked for voice stealing
1080         */
1081        int Engine::StealVoice(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOnEvent) {
1082            if (VoiceSpawnsLeft <= 0) {
1083                dmsg(1,("Max. voice thefts per audio fragment reached (you may raise CONFIG_MAX_VOICES).\n"));
1084                return -1;
1085            }
1086            if (!pEventPool->poolIsEmpty()) {
1087    
1088                RTList<Voice>::Iterator itSelectedVoice;
1089    
1090                // Select one voice for voice stealing
1091                switch (CONFIG_VOICE_STEAL_ALGO) {
1092    
1093                    // try to pick the oldest voice on the key where the new
1094                    // voice should be spawned, if there is no voice on that
1095                    // key, or no voice left to kill, then procceed with
1096                    // 'oldestkey' algorithm
1097                    case voice_steal_algo_oldestvoiceonkey: {
1098                        midi_key_info_t* pSelectedKey = &pEngineChannel->pMIDIKeyInfo[itNoteOnEvent->Param.Note.Key];
1099                        itSelectedVoice = pSelectedKey->pActiveVoices->first();
1100                        // proceed iterating if voice was created in this fragment cycle
1101                        while (itSelectedVoice && !itSelectedVoice->IsStealable()) ++itSelectedVoice;
1102                        // if we haven't found a voice then proceed with algorithm 'oldestkey'
1103                        if (itSelectedVoice && itSelectedVoice->IsStealable()) break;
1104                    } // no break - intentional !
1105    
1106                    // try to pick the oldest voice on the oldest active key
1107                    // from the same engine channel
1108                    // (caution: must stay after 'oldestvoiceonkey' algorithm !)
1109                    case voice_steal_algo_oldestkey: {
1110                        // if we already stole in this fragment, try to proceed on same key
1111                        if (this->itLastStolenVoice) {
1112                            itSelectedVoice = this->itLastStolenVoice;
1113                            do {
1114                                ++itSelectedVoice;
1115                            } while (itSelectedVoice && !itSelectedVoice->IsStealable()); // proceed iterating if voice was created in this fragment cycle
1116                            // found a "stealable" voice ?
1117                            if (itSelectedVoice && itSelectedVoice->IsStealable()) {
1118                                // remember which voice we stole, so we can simply proceed on next voice stealing
1119                                this->itLastStolenVoice = itSelectedVoice;
1120                                break; // selection succeeded
1121                            }
1122                        }
1123                        // get (next) oldest key
1124                        RTList<uint>::Iterator iuiSelectedKey = (this->iuiLastStolenKey) ? ++this->iuiLastStolenKey : pEngineChannel->pActiveKeys->first();
1125                        while (iuiSelectedKey) {
1126                            midi_key_info_t* pSelectedKey = &pEngineChannel->pMIDIKeyInfo[*iuiSelectedKey];
1127                            itSelectedVoice = pSelectedKey->pActiveVoices->first();
1128                            // proceed iterating if voice was created in this fragment cycle
1129                            while (itSelectedVoice && !itSelectedVoice->IsStealable()) ++itSelectedVoice;
1130                            // found a "stealable" voice ?
1131                            if (itSelectedVoice && itSelectedVoice->IsStealable()) {
1132                                // remember which voice on which key we stole, so we can simply proceed on next voice stealing
1133                                this->iuiLastStolenKey  = iuiSelectedKey;
1134                                this->itLastStolenVoice = itSelectedVoice;
1135                                break; // selection succeeded
1136                            }
1137                            ++iuiSelectedKey; // get next oldest key
1138                        }
1139                        break;
1140                    }
1141    
1142                    // don't steal anything
1143                    case voice_steal_algo_none:
1144                    default: {
1145                        dmsg(1,("No free voice (voice stealing disabled)!\n"));
1146                        return -1;
1147                    }
1148                }
1149    
1150                // if we couldn't steal a voice from the same engine channel then
1151                // steal oldest voice on the oldest key from any other engine channel
1152                // (the smaller engine channel number, the higher priority)
1153                if (!itSelectedVoice || !itSelectedVoice->IsStealable()) {
1154                    EngineChannel* pSelectedChannel;
1155                    int            iChannelIndex;
1156                    // select engine channel
1157                    if (pLastStolenChannel) {
1158                        pSelectedChannel = pLastStolenChannel;
1159                        iChannelIndex    = pSelectedChannel->iEngineIndexSelf;
1160                    } else { // pick the engine channel followed by this engine channel
1161                        iChannelIndex    = (pEngineChannel->iEngineIndexSelf + 1) % engineChannels.size();
1162                        pSelectedChannel = engineChannels[iChannelIndex];
1163                    }
1164    
1165                    // if we already stole in this fragment, try to proceed on same key
1166                    if (this->itLastStolenVoiceGlobally) {
1167                        itSelectedVoice = this->itLastStolenVoiceGlobally;
1168                        do {
1169                            ++itSelectedVoice;
1170                        } while (itSelectedVoice && !itSelectedVoice->IsStealable()); // proceed iterating if voice was created in this fragment cycle
1171                    }
1172    
1173                    #if CONFIG_DEVMODE
1174                    EngineChannel* pBegin = pSelectedChannel; // to detect endless loop
1175                    #endif // CONFIG_DEVMODE
1176    
1177                    // did we find a 'stealable' voice?
1178                    if (itSelectedVoice && itSelectedVoice->IsStealable()) {
1179                        // remember which voice we stole, so we can simply proceed on next voice stealing
1180                        this->itLastStolenVoiceGlobally = itSelectedVoice;
1181                    } else while (true) { // iterate through engine channels
1182                        // get (next) oldest key
1183                        RTList<uint>::Iterator iuiSelectedKey = (this->iuiLastStolenKeyGlobally) ? ++this->iuiLastStolenKeyGlobally : pSelectedChannel->pActiveKeys->first();
1184                        this->iuiLastStolenKeyGlobally = RTList<uint>::Iterator(); // to prevent endless loop (see line above)
1185                        while (iuiSelectedKey) {
1186                            midi_key_info_t* pSelectedKey = &pSelectedChannel->pMIDIKeyInfo[*iuiSelectedKey];
1187                            itSelectedVoice = pSelectedKey->pActiveVoices->first();
1188                            // proceed iterating if voice was created in this fragment cycle
1189                            while (itSelectedVoice && !itSelectedVoice->IsStealable()) ++itSelectedVoice;
1190                            // found a "stealable" voice ?
1191                            if (itSelectedVoice && itSelectedVoice->IsStealable()) {
1192                                // remember which voice on which key on which engine channel we stole, so we can simply proceed on next voice stealing
1193                                this->iuiLastStolenKeyGlobally  = iuiSelectedKey;
1194                                this->itLastStolenVoiceGlobally = itSelectedVoice;
1195                                this->pLastStolenChannel        = pSelectedChannel;
1196                                goto stealable_voice_found; // selection succeeded
1197                            }
1198                            ++iuiSelectedKey; // get next key on current engine channel
1199                        }
1200                        // get next engine channel
1201                        iChannelIndex    = (iChannelIndex + 1) % engineChannels.size();
1202                        pSelectedChannel = engineChannels[iChannelIndex];
1203    
1204                        #if CONFIG_DEVMODE
1205                        if (pSelectedChannel == pBegin) {
1206                            dmsg(1,("FATAL ERROR: voice stealing endless loop!\n"));
1207                            dmsg(1,("VoiceSpawnsLeft=%d.\n", VoiceSpawnsLeft));
1208                            dmsg(1,("Exiting.\n"));
1209                            exit(-1);
1210                        }
1211                        #endif // CONFIG_DEVMODE
1212                    }
1213                }
1214    
1215                // jump point if a 'stealable' voice was found
1216                stealable_voice_found:
1217    
1218                #if CONFIG_DEVMODE
1219                if (!itSelectedVoice->IsActive()) {
1220                    dmsg(1,("gig::Engine: ERROR, tried to steal a voice which was not active !!!\n"));
1221                    return -1;
1222                }
1223                #endif // CONFIG_DEVMODE
1224    
1225                // now kill the selected voice
1226                itSelectedVoice->Kill(itNoteOnEvent);
1227    
1228                --VoiceSpawnsLeft;
1229    
1230                return 0; // success
1231            }
1232            else {
1233                dmsg(1,("Event pool emtpy!\n"));
1234                return -1;
1235            }
1236        }
1237    
1238        /**
1239         *  Removes the given voice from the MIDI key's list of active voices.
1240         *  This method will be called when a voice went inactive, e.g. because
1241         *  it finished to playback its sample, finished its release stage or
1242         *  just was killed.
1243         *
1244         *  @param pEngineChannel - engine channel on which this event occured on
1245         *  @param itVoice - points to the voice to be freed
1246         */
1247        void Engine::FreeVoice(EngineChannel* pEngineChannel, Pool<Voice>::Iterator& itVoice) {
1248            if (itVoice) {
1249                midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[itVoice->MIDIKey];
1250    
1251                uint keygroup = itVoice->KeyGroup;
1252    
1253              // free the voice object              // free the voice object
1254              pVoicePool->free(pVoice);              pVoicePool->free(itVoice);
1255    
1256              // check if there are no voices left on the MIDI key and update the key info if so              // if no other voices left and member of a key group, remove from key group
1257              if (pKey->pActiveVoices->is_empty()) {              if (pKey->pActiveVoices->isEmpty() && keygroup) {
1258                  pKey->Active = false;                  uint** ppKeyGroup = &pEngineChannel->ActiveKeyGroups[keygroup];
1259                  pActiveKeys->free(pKey->pSelf); // remove key from list of active keys                  if (*ppKeyGroup == &*pKey->itSelf) *ppKeyGroup = NULL; // remove key from key group
                 pKey->pSelf = NULL;  
                 dmsg(3,("Key has no more voices now\n"));  
1260              }              }
1261          }          }
1262          else std::cerr << "Couldn't release voice! (pVoice == NULL)\n" << std::flush;          else std::cerr << "Couldn't release voice! (!itVoice)\n" << std::flush;
1263        }
1264    
1265        /**
1266         *  Called when there's no more voice left on a key, this call will
1267         *  update the key info respectively.
1268         *
1269         *  @param pEngineChannel - engine channel on which this event occured on
1270         *  @param pKey - key which is now inactive
1271         */
1272        void Engine::FreeKey(EngineChannel* pEngineChannel, midi_key_info_t* pKey) {
1273            if (pKey->pActiveVoices->isEmpty()) {
1274                pKey->Active = false;
1275                pEngineChannel->pActiveKeys->free(pKey->itSelf); // remove key from list of active keys
1276                pKey->itSelf = RTList<uint>::Iterator();
1277                pKey->ReleaseTrigger = false;
1278                pKey->pEvents->clear();
1279                dmsg(3,("Key has no more voices now\n"));
1280            }
1281            else dmsg(1,("gig::Engine: Oops, tried to free a key which contains voices.\n"));
1282      }      }
1283    
1284      /**      /**
1285       *  Reacts on supported control change commands (e.g. pitch bend wheel,       *  Reacts on supported control change commands (e.g. pitch bend wheel,
1286       *  modulation wheel, aftertouch).       *  modulation wheel, aftertouch).
1287       *       *
1288       *  @param pControlChangeEvent - controller, value and time stamp of the event       *  @param pEngineChannel - engine channel on which this event occured on
1289         *  @param itControlChangeEvent - controller, value and time stamp of the event
1290       */       */
1291      void Engine::ProcessControlChange(Event* pControlChangeEvent) {      void Engine::ProcessControlChange(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itControlChangeEvent) {
1292          dmsg(4,("Engine::ContinuousController cc=%d v=%d\n", pControlChangeEvent->Controller, pControlChangeEvent->Value));          dmsg(4,("Engine::ContinuousController cc=%d v=%d\n", itControlChangeEvent->Param.CC.Controller, itControlChangeEvent->Param.CC.Value));
1293    
1294            // update controller value in the engine channel's controller table
1295            pEngineChannel->ControllerTable[itControlChangeEvent->Param.CC.Controller] = itControlChangeEvent->Param.CC.Value;
1296    
1297          switch (pControlChangeEvent->Controller) {          // handle hard coded MIDI controllers
1298              case 64: {          switch (itControlChangeEvent->Param.CC.Controller) {
1299                  if (pControlChangeEvent->Value >= 64 && !SustainPedal) {              case 5: { // portamento time
1300                      dmsg(4,("PEDAL DOWN\n"));                  pEngineChannel->PortamentoTime = (float) itControlChangeEvent->Param.CC.Value / 127.0f * (float) CONFIG_PORTAMENTO_TIME_MAX + (float) CONFIG_PORTAMENTO_TIME_MIN;
1301                      SustainPedal = true;                  break;
1302                }
1303                case 7: { // volume
1304                    //TODO: not sample accurate yet
1305                    pEngineChannel->MidiVolume = VolumeCurve[itControlChangeEvent->Param.CC.Value];
1306                    pEngineChannel->bStatusChanged = true; // engine channel status has changed, so set notify flag
1307                    break;
1308                }
1309                case 10: { // panpot
1310                    //TODO: not sample accurate yet
1311                    pEngineChannel->GlobalPanLeft  = PanCurve[128 - itControlChangeEvent->Param.CC.Value];
1312                    pEngineChannel->GlobalPanRight = PanCurve[itControlChangeEvent->Param.CC.Value];
1313                    break;
1314                }
1315                case 64: { // sustain
1316                    if (itControlChangeEvent->Param.CC.Value >= 64 && !pEngineChannel->SustainPedal) {
1317                        dmsg(4,("DAMPER (RIGHT) PEDAL DOWN\n"));
1318                        pEngineChannel->SustainPedal = true;
1319    
1320                        #if !CONFIG_PROCESS_MUTED_CHANNELS
1321                        if (pEngineChannel->GetMute()) return; // skip if sampler channel is muted
1322                        #endif
1323    
1324                      // cancel release process of voices if necessary                      // cancel release process of voices if necessary
1325                      uint* piKey = pActiveKeys->first();                      RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();
1326                      if (piKey) {                      for (; iuiKey; ++iuiKey) {
1327                          pControlChangeEvent->Type = Event::type_cancel_release; // transform event type                          midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];
1328                          while (piKey) {                          if (!pKey->KeyPressed) {
1329                              midi_key_info_t* pKey = &pMIDIKeyInfo[*piKey];                              RTList<Event>::Iterator itNewEvent = pKey->pEvents->allocAppend();
1330                              pActiveKeys->set_current(piKey);                              if (itNewEvent) {
1331                              piKey = pActiveKeys->next();                                  *itNewEvent = *itControlChangeEvent; // copy event to the key's own event list
1332                              if (!pKey->KeyPressed) {                                  itNewEvent->Type = Event::type_cancel_release; // transform event type
                                 Event* pNewEvent = pKey->pEvents->alloc();  
                                 if (pNewEvent) *pNewEvent = *pControlChangeEvent; // copy event to the key's own event list  
                                 else dmsg(1,("Event pool emtpy!\n"));  
1333                              }                              }
1334                                else dmsg(1,("Event pool emtpy!\n"));
1335                          }                          }
1336                      }                      }
1337                  }                  }
1338                  if (pControlChangeEvent->Value < 64 && SustainPedal) {                  if (itControlChangeEvent->Param.CC.Value < 64 && pEngineChannel->SustainPedal) {
1339                      dmsg(4,("PEDAL UP\n"));                      dmsg(4,("DAMPER (RIGHT) PEDAL UP\n"));
1340                      SustainPedal = false;                      pEngineChannel->SustainPedal = false;
1341    
1342                        #if !CONFIG_PROCESS_MUTED_CHANNELS
1343                        if (pEngineChannel->GetMute()) return; // skip if sampler channel is muted
1344                        #endif
1345    
1346                      // release voices if their respective key is not pressed                      // release voices if their respective key is not pressed
1347                      uint* piKey = pActiveKeys->first();                      RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();
1348                      if (piKey) {                      for (; iuiKey; ++iuiKey) {
1349                          pControlChangeEvent->Type = Event::type_release; // transform event type                          midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];
1350                          while (piKey) {                          if (!pKey->KeyPressed && ShouldReleaseVoice(pEngineChannel, *iuiKey)) {
1351                              midi_key_info_t* pKey = &pMIDIKeyInfo[*piKey];                              RTList<Event>::Iterator itNewEvent = pKey->pEvents->allocAppend();
1352                              pActiveKeys->set_current(piKey);                              if (itNewEvent) {
1353                              piKey = pActiveKeys->next();                                  *itNewEvent = *itControlChangeEvent; // copy event to the key's own event list
1354                              if (!pKey->KeyPressed) {                                  itNewEvent->Type = Event::type_release; // transform event type
1355                                  Event* pNewEvent = pKey->pEvents->alloc();                              }
1356                                  if (pNewEvent) *pNewEvent = *pControlChangeEvent; // copy event to the key's own event list                              else dmsg(1,("Event pool emtpy!\n"));
1357                                  else dmsg(1,("Event pool emtpy!\n"));                          }
1358                        }
1359                    }
1360                    break;
1361                }
1362                case 65: { // portamento on / off
1363                    KillAllVoices(pEngineChannel, itControlChangeEvent);
1364                    pEngineChannel->PortamentoMode = itControlChangeEvent->Param.CC.Value >= 64;
1365                    break;
1366                }
1367                case 66: { // sostenuto
1368                    if (itControlChangeEvent->Param.CC.Value >= 64 && !pEngineChannel->SostenutoPedal) {
1369                        dmsg(4,("SOSTENUTO (CENTER) PEDAL DOWN\n"));
1370                        pEngineChannel->SostenutoPedal = true;
1371    
1372                        #if !CONFIG_PROCESS_MUTED_CHANNELS
1373                        if (pEngineChannel->GetMute()) return; // skip if sampler channel is muted
1374                        #endif
1375    
1376                        SostenutoKeyCount = 0;
1377                        // Remeber the pressed keys
1378                        RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();
1379                        for (; iuiKey; ++iuiKey) {
1380                            midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];
1381                            if (pKey->KeyPressed && SostenutoKeyCount < 128) SostenutoKeys[SostenutoKeyCount++] = *iuiKey;
1382                        }
1383                    }
1384                    if (itControlChangeEvent->Param.CC.Value < 64 && pEngineChannel->SostenutoPedal) {
1385                        dmsg(4,("SOSTENUTO (CENTER) PEDAL UP\n"));
1386                        pEngineChannel->SostenutoPedal = false;
1387    
1388                        #if !CONFIG_PROCESS_MUTED_CHANNELS
1389                        if (pEngineChannel->GetMute()) return; // skip if sampler channel is muted
1390                        #endif
1391    
1392                        // release voices if the damper pedal is up and their respective key is not pressed
1393                        for (int i = 0; i < SostenutoKeyCount; i++) {
1394                            midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[SostenutoKeys[i]];
1395                            if (!pKey->KeyPressed && !pEngineChannel->SustainPedal) {
1396                                RTList<Event>::Iterator itNewEvent = pKey->pEvents->allocAppend();
1397                                if (itNewEvent) {
1398                                    *itNewEvent = *itControlChangeEvent; // copy event to the key's own event list
1399                                    itNewEvent->Type = Event::type_release; // transform event type
1400                              }                              }
1401                                else dmsg(1,("Event pool emtpy!\n"));
1402                          }                          }
1403                      }                      }
1404                  }                  }
1405                  break;                  break;
1406              }              }
1407    
1408    
1409                // Channel Mode Messages
1410    
1411                case 120: { // all sound off
1412                    KillAllVoices(pEngineChannel, itControlChangeEvent);
1413                    break;
1414                }
1415                case 121: { // reset all controllers
1416                    pEngineChannel->ResetControllers();
1417                    break;
1418                }
1419                case 123: { // all notes off
1420                    #if CONFIG_PROCESS_ALL_NOTES_OFF
1421                    ReleaseAllVoices(pEngineChannel, itControlChangeEvent);
1422                    #endif // CONFIG_PROCESS_ALL_NOTES_OFF
1423                    break;
1424                }
1425                case 126: { // mono mode on
1426                    KillAllVoices(pEngineChannel, itControlChangeEvent);
1427                    pEngineChannel->SoloMode = true;
1428                    break;
1429                }
1430                case 127: { // poly mode on
1431                    KillAllVoices(pEngineChannel, itControlChangeEvent);
1432                    pEngineChannel->SoloMode = false;
1433                    break;
1434                }
1435            }
1436    
1437            // handle FX send controllers
1438            if (!pEngineChannel->fxSends.empty()) {
1439                for (int iFxSend = 0; iFxSend < pEngineChannel->GetFxSendCount(); iFxSend++) {
1440                    FxSend* pFxSend = pEngineChannel->GetFxSend(iFxSend);
1441                    if (pFxSend->MidiController() == itControlChangeEvent->Param.CC.Controller)
1442                        pFxSend->SetLevel(itControlChangeEvent->Param.CC.Value);
1443                }
1444          }          }
1445        }
1446    
1447          // update controller value in the engine's controller table      /**
1448          ControllerTable[pControlChangeEvent->Controller] = pControlChangeEvent->Value;       *  Reacts on MIDI system exclusive messages.
1449         *
1450         *  @param itSysexEvent - sysex data size and time stamp of the sysex event
1451         */
1452        void Engine::ProcessSysex(Pool<Event>::Iterator& itSysexEvent) {
1453            RingBuffer<uint8_t,false>::NonVolatileReader reader = pSysexBuffer->get_non_volatile_reader();
1454    
1455          // move event from the unsorted event list to the control change event list          uint8_t exclusive_status, id;
1456          pEvents->move(pControlChangeEvent, pCCEvents);          if (!reader.pop(&exclusive_status)) goto free_sysex_data;
1457            if (!reader.pop(&id))               goto free_sysex_data;
1458            if (exclusive_status != 0xF0)       goto free_sysex_data;
1459    
1460            switch (id) {
1461                case 0x41: { // Roland
1462                    dmsg(3,("Roland Sysex\n"));
1463                    uint8_t device_id, model_id, cmd_id;
1464                    if (!reader.pop(&device_id)) goto free_sysex_data;
1465                    if (!reader.pop(&model_id))  goto free_sysex_data;
1466                    if (!reader.pop(&cmd_id))    goto free_sysex_data;
1467                    if (model_id != 0x42 /*GS*/) goto free_sysex_data;
1468                    if (cmd_id != 0x12 /*DT1*/)  goto free_sysex_data;
1469    
1470                    // command address
1471                    uint8_t addr[3]; // 2 byte addr MSB, followed by 1 byte addr LSB)
1472                    const RingBuffer<uint8_t,false>::NonVolatileReader checksum_reader = reader; // so we can calculate the check sum later
1473                    if (reader.read(&addr[0], 3) != 3) goto free_sysex_data;
1474                    if (addr[0] == 0x40 && addr[1] == 0x00) { // System Parameters
1475                        dmsg(3,("\tSystem Parameter\n"));
1476                    }
1477                    else if (addr[0] == 0x40 && addr[1] == 0x01) { // Common Parameters
1478                        dmsg(3,("\tCommon Parameter\n"));
1479                    }
1480                    else if (addr[0] == 0x40 && (addr[1] & 0xf0) == 0x10) { // Part Parameters (1)
1481                        dmsg(3,("\tPart Parameter\n"));
1482                        switch (addr[2]) {
1483                            case 0x40: { // scale tuning
1484                                dmsg(3,("\t\tScale Tuning\n"));
1485                                uint8_t scale_tunes[12]; // detuning of all 12 semitones of an octave
1486                                if (reader.read(&scale_tunes[0], 12) != 12) goto free_sysex_data;
1487                                uint8_t checksum;
1488                                if (!reader.pop(&checksum)) goto free_sysex_data;
1489                                #if CONFIG_ASSERT_GS_SYSEX_CHECKSUM
1490                                if (GSCheckSum(checksum_reader, 12)) goto free_sysex_data;
1491                                #endif // CONFIG_ASSERT_GS_SYSEX_CHECKSUM
1492                                for (int i = 0; i < 12; i++) scale_tunes[i] -= 64;
1493                                AdjustScale((int8_t*) scale_tunes);
1494                                dmsg(3,("\t\t\tNew scale applied.\n"));
1495                                break;
1496                            }
1497                        }
1498                    }
1499                    else if (addr[0] == 0x40 && (addr[1] & 0xf0) == 0x20) { // Part Parameters (2)
1500                    }
1501                    else if (addr[0] == 0x41) { // Drum Setup Parameters
1502                    }
1503                    break;
1504                }
1505            }
1506    
1507            free_sysex_data: // finally free sysex data
1508            pSysexBuffer->increment_read_ptr(itSysexEvent->Param.Sysex.Size);
1509      }      }
1510    
1511      /**      /**
1512       * Initialize the parameter sequence for the modulation destination given by       * Calculates the Roland GS sysex check sum.
1513       * by 'dst' with the constant value given by val.       *
1514         * @param AddrReader - reader which currently points to the first GS
1515         *                     command address byte of the GS sysex message in
1516         *                     question
1517         * @param DataSize   - size of the GS message data (in bytes)
1518         */
1519        uint8_t Engine::GSCheckSum(const RingBuffer<uint8_t,false>::NonVolatileReader AddrReader, uint DataSize) {
1520            RingBuffer<uint8_t,false>::NonVolatileReader reader = AddrReader;
1521            uint bytes = 3 /*addr*/ + DataSize;
1522            uint8_t addr_and_data[bytes];
1523            reader.read(&addr_and_data[0], bytes);
1524            uint8_t sum = 0;
1525            for (uint i = 0; i < bytes; i++) sum += addr_and_data[i];
1526            return 128 - sum % 128;
1527        }
1528    
1529        /**
1530         * Allows to tune each of the twelve semitones of an octave.
1531         *
1532         * @param ScaleTunes - detuning of all twelve semitones (in cents)
1533         */
1534        void Engine::AdjustScale(int8_t ScaleTunes[12]) {
1535            memcpy(&this->ScaleTuning[0], &ScaleTunes[0], 12); //TODO: currently not sample accurate
1536        }
1537    
1538        /**
1539         * Releases all voices on an engine channel. All voices will go into
1540         * the release stage and thus it might take some time (e.g. dependant to
1541         * their envelope release time) until they actually die.
1542         *
1543         * @param pEngineChannel - engine channel on which all voices should be released
1544         * @param itReleaseEvent - event which caused this releasing of all voices
1545       */       */
1546      void Engine::ResetSynthesisParameters(Event::destination_t dst, float val) {      void Engine::ReleaseAllVoices(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itReleaseEvent) {
1547          int maxsamples = pAudioOutputDevice->MaxSamplesPerCycle();          RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();
1548          for (int i = 0; i < maxsamples; i++) pSynthesisParameters[dst][i] = val;          while (iuiKey) {
1549                midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];
1550                ++iuiKey;
1551                // append a 'release' event to the key's own event list
1552                RTList<Event>::Iterator itNewEvent = pKey->pEvents->allocAppend();
1553                if (itNewEvent) {
1554                    *itNewEvent = *itReleaseEvent; // copy original event (to the key's event list)
1555                    itNewEvent->Type = Event::type_release; // transform event type
1556                }
1557                else dmsg(1,("Event pool emtpy!\n"));
1558            }
1559      }      }
1560    
1561      float Engine::Volume() {      /**
1562          return GlobalVolume;       * Kills all voices on an engine channel as soon as possible. Voices
1563         * won't get into release state, their volume level will be ramped down
1564         * as fast as possible.
1565         *
1566         * @param pEngineChannel - engine channel on which all voices should be killed
1567         * @param itKillEvent    - event which caused this killing of all voices
1568         */
1569        void Engine::KillAllVoices(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itKillEvent) {
1570            RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();
1571            RTList<uint>::Iterator end    = pEngineChannel->pActiveKeys->end();
1572            while (iuiKey != end) { // iterate through all active keys
1573                midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];
1574                ++iuiKey;
1575                RTList<Voice>::Iterator itVoice     = pKey->pActiveVoices->first();
1576                RTList<Voice>::Iterator itVoicesEnd = pKey->pActiveVoices->end();
1577                for (; itVoice != itVoicesEnd; ++itVoice) { // iterate through all voices on this key
1578                    itVoice->Kill(itKillEvent);
1579                    --VoiceSpawnsLeft; //FIXME: just a temporary workaround, we should check the cause in StealVoice() instead
1580                }
1581            }
1582      }      }
1583    
1584      void Engine::Volume(float f) {      /**
1585          GlobalVolume = f;       * Determines whether the specified voice should be released.
1586         *
1587         * @param pEngineChannel - The engine channel on which the voice should be checked
1588         * @param Key - The key number
1589         * @returns true if the specified should be released, false otherwise.
1590         */
1591        bool Engine::ShouldReleaseVoice(EngineChannel* pEngineChannel, int Key) {
1592            if (pEngineChannel->SustainPedal) return false;
1593    
1594            if (pEngineChannel->SostenutoPedal) {
1595                for (int i = 0; i < SostenutoKeyCount; i++)
1596                    if (Key == SostenutoKeys[i]) return false;
1597            }
1598    
1599            return true;
1600      }      }
1601    
1602      uint Engine::VoiceCount() {      uint Engine::VoiceCount() {
# Line 674  namespace LinuxSampler { namespace gig { Line 1627  namespace LinuxSampler { namespace gig {
1627          return pDiskThread->GetBufferFillPercentage();          return pDiskThread->GetBufferFillPercentage();
1628      }      }
1629    
1630        String Engine::EngineName() {
1631            return LS_GIG_ENGINE_NAME;
1632        }
1633    
1634      String Engine::Description() {      String Engine::Description() {
1635          return "Gigasampler Engine";          return "Gigasampler Engine";
1636      }      }
1637    
1638      String Engine::Version() {      String Engine::Version() {
1639          return "0.0.1-0cvs20040423";          String s = "$Revision: 1.70 $";
1640            return s.substr(11, s.size() - 13); // cut dollar signs, spaces and CVS macro keyword
1641        }
1642    
1643        InstrumentManager* Engine::GetInstrumentManager() {
1644            return &instruments;
1645        }
1646    
1647        // static constant initializers
1648        const float* Engine::VolumeCurve(InitVolumeCurve());
1649        const float* Engine::PanCurve(InitPanCurve());
1650        const float* Engine::CrossfadeCurve(InitCrossfadeCurve());
1651    
1652        float* Engine::InitVolumeCurve() {
1653            // line-segment approximation
1654            const float segments[] = {
1655                0, 0, 2, 0.0046, 16, 0.016, 31, 0.051, 45, 0.115, 54.5, 0.2,
1656                64.5, 0.39, 74, 0.74, 92, 1.03, 114, 1.94, 119.2, 2.2, 127, 2.2
1657            };
1658            return InitCurve(segments);
1659        }
1660    
1661        float* Engine::InitPanCurve() {
1662            // line-segment approximation
1663            const float segments[] = {
1664                0, 0, 1, 0,
1665                2, 0.05, 31.5, 0.7, 51, 0.851, 74.5, 1.12,
1666                127, 1.41, 128, 1.41
1667            };
1668            return InitCurve(segments, 129);
1669        }
1670    
1671        float* Engine::InitCrossfadeCurve() {
1672            // line-segment approximation
1673            const float segments[] = {
1674                0, 0, 1, 0.03, 10, 0.1, 51, 0.58, 127, 1
1675            };
1676            return InitCurve(segments);
1677        }
1678    
1679        float* Engine::InitCurve(const float* segments, int size) {
1680            float* y = new float[size];
1681            for (int x = 0 ; x < size ; x++) {
1682                if (x > segments[2]) segments += 2;
1683                y[x] = segments[1] + (x - segments[0]) *
1684                    (segments[3] - segments[1]) / (segments[2] - segments[0]);
1685            }
1686            return y;
1687      }      }
1688    
1689  }} // namespace LinuxSampler::gig  }} // namespace LinuxSampler::gig

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