/[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 775 by schoenebeck, Wed Sep 21 14:30:43 2005 UTC
# Line 3  Line 3 
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 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>(CONFIG_SYSEX_BUFFER_SIZE, 0);
101          pEventPool         = new RTELMemoryPool<Event>(MAX_EVENTS_PER_FRAGMENT);          pEventQueue        = new RingBuffer<Event>(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          if (pDiskThread) {          if (pDiskThread) {
120                dmsg(1,("Stopping disk thread..."));
121              pDiskThread->StopThread();              pDiskThread->StopThread();
122              delete pDiskThread;              delete pDiskThread;
123                dmsg(1,("OK\n"));
124          }          }
         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;  
125          if (pEventQueue) delete pEventQueue;          if (pEventQueue) delete pEventQueue;
126          if (pEventPool)  delete pEventPool;          if (pEventPool)  delete pEventPool;
127          if (pVoicePool)  delete pVoicePool;          if (pVoicePool) {
128          if (pActiveKeys) delete pActiveKeys;              pVoicePool->clear();
129                delete pVoicePool;
130            }
131          if (pEventGenerator) delete pEventGenerator;          if (pEventGenerator) delete pEventGenerator;
132          if (pSynthesisParameters[0]) delete[] pSynthesisParameters[0];          if (pVoiceStealingQueue) delete pVoiceStealingQueue;
133            if (pSysexBuffer) delete pSysexBuffer;
134            EngineFactory::Destroy(this);
135      }      }
136    
137      void Engine::Enable() {      void Engine::Enable() {
138          dmsg(3,("gig::Engine: enabling\n"));          dmsg(3,("gig::Engine: enabling\n"));
139          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)
140          dmsg(1,("gig::Engine: enabled (val=%d)\n", EngineDisabled.GetUnsafe()));          dmsg(3,("gig::Engine: enabled (val=%d)\n", EngineDisabled.GetUnsafe()));
141      }      }
142    
143      void Engine::Disable() {      void Engine::Disable() {
# Line 112  namespace LinuxSampler { namespace gig { Line 158  namespace LinuxSampler { namespace gig {
158       */       */
159      void Engine::Reset() {      void Engine::Reset() {
160          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();  
   
161          ResetInternal();          ResetInternal();
162            ResetScaleTuning();
         // signal audio thread to continue with rendering  
         //SuspensionRequested = false;  
163          Enable();          Enable();
164      }      }
165    
# Line 138  namespace LinuxSampler { namespace gig { Line 168  namespace LinuxSampler { namespace gig {
168       *  control and status variables. This method is not thread safe!       *  control and status variables. This method is not thread safe!
169       */       */
170      void Engine::ResetInternal() {      void Engine::ResetInternal() {
         Pitch               = 0;  
         SustainPedal        = false;  
171          ActiveVoiceCount    = 0;          ActiveVoiceCount    = 0;
172          ActiveVoiceCountMax = 0;          ActiveVoiceCountMax = 0;
173    
174          // set all MIDI controller values to zero          // reset voice stealing parameters
175          memset(ControllerTable, 0x00, 128);          pVoiceStealingQueue->clear();
176            itLastStolenVoice          = RTList<Voice>::Iterator();
177          // reset key info          itLastStolenVoiceGlobally  = RTList<Voice>::Iterator();
178          for (uint i = 0; i < 128; i++) {          iuiLastStolenKey           = RTList<uint>::Iterator();
179              pMIDIKeyInfo[i].pActiveVoices->clear();          iuiLastStolenKeyGlobally   = RTList<uint>::Iterator();
180              pMIDIKeyInfo[i].pEvents->clear();          pLastStolenChannel         = NULL;
             pMIDIKeyInfo[i].KeyPressed = false;  
             pMIDIKeyInfo[i].Active     = false;  
             pMIDIKeyInfo[i].pSelf      = NULL;  
         }  
181    
182          // reset all voices          // reset all voices
183          for (Voice* pVoice = pVoicePool->alloc(); pVoice; pVoice = pVoicePool->alloc()) {          for (RTList<Voice>::Iterator iterVoice = pVoicePool->allocAppend(); iterVoice == pVoicePool->last(); iterVoice = pVoicePool->allocAppend()) {
184              pVoice->Reset();              iterVoice->Reset();
185          }          }
186          pVoicePool->clear();          pVoicePool->clear();
187    
         // free all active keys  
         pActiveKeys->clear();  
   
188          // reset disk thread          // reset disk thread
189          if (pDiskThread) pDiskThread->Reset();          if (pDiskThread) pDiskThread->Reset();
190    
191          // delete all input events          // delete all input events
192          pEventQueue->init();          pEventQueue->init();
193            pSysexBuffer->init();
194      }      }
195    
196      /**      /**
197       *  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.  
198       */       */
199      void Engine::ResourceToBeUpdated(::gig::Instrument* pResource, void*& pUpdateArg) {      void Engine::ResetScaleTuning() {
200          dmsg(3,("gig::Engine: Received instrument update message.\n"));          memset(&ScaleTuning[0], 0x00, 12);
         DisableAndLock();  
         ResetInternal();  
         this->pInstrument = NULL;  
201      }      }
202    
203      /**      /**
204       * Will be called by the InstrumentResourceManager when the instrument       * Connect this engine instance with the given audio output device.
205       * update process was completed, so we can continue with playback.       * This method will be called when an Engine instance is created.
206         * All of the engine's data structures which are dependant to the used
207         * audio output device / driver will be (re)allocated and / or
208         * adjusted appropriately.
209         *
210         * @param pAudioOut - audio output device to connect to
211       */       */
     void Engine::ResourceUpdated(::gig::Instrument* pOldResource, ::gig::Instrument* pNewResource, void* pUpdateArg) {  
         this->pInstrument = pNewResource;  
         Enable();  
     }  
   
212      void Engine::Connect(AudioOutputDevice* pAudioOut) {      void Engine::Connect(AudioOutputDevice* pAudioOut) {
213          pAudioOutputDevice = pAudioOut;          pAudioOutputDevice = pAudioOut;
214    
# Line 261  namespace LinuxSampler { namespace gig { Line 223  namespace LinuxSampler { namespace gig {
223              throw LinuxSamplerException(msg);              throw LinuxSamplerException(msg);
224          }          }
225    
226            this->MaxSamplesPerCycle = pAudioOutputDevice->MaxSamplesPerCycle();
227            this->SampleRate         = pAudioOutputDevice->SampleRate();
228    
229            // FIXME: audio drivers with varying fragment sizes might be a problem here
230            MaxFadeOutPos = MaxSamplesPerCycle - int(double(SampleRate) * CONFIG_EG_MIN_RELEASE_TIME) - 1;
231            if (MaxFadeOutPos < 0) {
232                std::cerr << "gig::Engine: WARNING, CONFIG_EG_MIN_RELEASE_TIME "
233                          << "too big for current audio fragment size & sampling rate! "
234                          << "May lead to click sounds if voice stealing chimes in!\n" << std::flush;
235                // force volume ramp downs at the beginning of each fragment
236                MaxFadeOutPos = 0;
237                // lower minimum release time
238                const float minReleaseTime = (float) MaxSamplesPerCycle / (float) SampleRate;
239                for (RTList<Voice>::Iterator iterVoice = pVoicePool->allocAppend(); iterVoice == pVoicePool->last(); iterVoice = pVoicePool->allocAppend()) {
240                    iterVoice->EG1.CalculateFadeOutCoeff(minReleaseTime, SampleRate);
241                }
242                pVoicePool->clear();
243            }
244    
245          // (re)create disk thread          // (re)create disk thread
246          if (this->pDiskThread) {          if (this->pDiskThread) {
247                dmsg(1,("Stopping disk thread..."));
248              this->pDiskThread->StopThread();              this->pDiskThread->StopThread();
249              delete this->pDiskThread;              delete this->pDiskThread;
250                dmsg(1,("OK\n"));
251          }          }
252          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
253          if (!pDiskThread) {          if (!pDiskThread) {
254              dmsg(0,("gig::Engine  new diskthread = NULL\n"));              dmsg(0,("gig::Engine  new diskthread = NULL\n"));
255              exit(EXIT_FAILURE);              exit(EXIT_FAILURE);
256          }          }
257    
258          for (Voice* pVoice = pVoicePool->alloc(); pVoice; pVoice = pVoicePool->alloc()) {          for (RTList<Voice>::Iterator iterVoice = pVoicePool->allocAppend(); iterVoice == pVoicePool->last(); iterVoice = pVoicePool->allocAppend()) {
259              pVoice->pDiskThread = this->pDiskThread;              iterVoice->pDiskThread = this->pDiskThread;
             pVoice->SetOutput(pAudioOut);  
260              dmsg(3,("d"));              dmsg(3,("d"));
261          }          }
262          pVoicePool->clear();          pVoicePool->clear();
# Line 283  namespace LinuxSampler { namespace gig { Line 265  namespace LinuxSampler { namespace gig {
265          if (pEventGenerator) delete pEventGenerator;          if (pEventGenerator) delete pEventGenerator;
266          pEventGenerator = new EventGenerator(pAudioOut->SampleRate());          pEventGenerator = new EventGenerator(pAudioOut->SampleRate());
267    
         // (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();  
   
268          dmsg(1,("Starting disk thread..."));          dmsg(1,("Starting disk thread..."));
269          pDiskThread->StartThread();          pDiskThread->StartThread();
270          dmsg(1,("OK\n"));          dmsg(1,("OK\n"));
271    
272          for (Voice* pVoice = pVoicePool->first(); pVoice; pVoice = pVoicePool->next()) {          for (RTList<Voice>::Iterator iterVoice = pVoicePool->allocAppend(); iterVoice == pVoicePool->last(); iterVoice = pVoicePool->allocAppend()) {
273              if (!pVoice->pDiskThread) {              if (!iterVoice->pDiskThread) {
274                  dmsg(0,("Engine -> voice::trigger: !pDiskThread\n"));                  dmsg(0,("Engine -> voice::trigger: !pDiskThread\n"));
275                  exit(EXIT_FAILURE);                  exit(EXIT_FAILURE);
276              }              }
277          }          }
278      }      }
279    
280      void Engine::DisconnectAudioOutputDevice() {      /**
281          if (pAudioOutputDevice) { // if clause to prevent disconnect loops       * Clear all engine global event lists.
282              AudioOutputDevice* olddevice = pAudioOutputDevice;       */
283              pAudioOutputDevice = NULL;      void Engine::ClearEventLists() {
284              olddevice->Disconnect(this);          pGlobalEvents->clear();
285        }
286    
287        /**
288         * Copy all events from the engine's global input queue buffer to the
289         * engine's internal event list. This will be done at the beginning of
290         * each audio cycle (that is each RenderAudio() call) to distinguish
291         * all global events which have to be processed in the current audio
292         * cycle. These events are usually just SysEx messages. Every
293         * EngineChannel has it's own input event queue buffer and event list
294         * to handle common events like NoteOn, NoteOff and ControlChange
295         * events.
296         *
297         * @param Samples - number of sample points to be processed in the
298         *                  current audio cycle
299         */
300        void Engine::ImportEvents(uint Samples) {
301            RingBuffer<Event>::NonVolatileReader eventQueueReader = pEventQueue->get_non_volatile_reader();
302            Event* pEvent;
303            while (true) {
304                // get next event from input event queue
305                if (!(pEvent = eventQueueReader.pop())) break;
306                // if younger event reached, ignore that and all subsequent ones for now
307                if (pEvent->FragmentPos() >= Samples) {
308                    eventQueueReader--;
309                    dmsg(2,("Younger Event, pos=%d ,Samples=%d!\n",pEvent->FragmentPos(),Samples));
310                    pEvent->ResetFragmentPos();
311                    break;
312                }
313                // copy event to internal event list
314                if (pGlobalEvents->poolIsEmpty()) {
315                    dmsg(1,("Event pool emtpy!\n"));
316                    break;
317                }
318                *pGlobalEvents->allocAppend() = *pEvent;
319          }          }
320            eventQueueReader.free(); // free all copied events from input queue
321      }      }
322    
323      /**      /**
# Line 322  namespace LinuxSampler { namespace gig { Line 333  namespace LinuxSampler { namespace gig {
333      int Engine::RenderAudio(uint Samples) {      int Engine::RenderAudio(uint Samples) {
334          dmsg(5,("RenderAudio(Samples=%d)\n", Samples));          dmsg(5,("RenderAudio(Samples=%d)\n", Samples));
335    
336          // return if no instrument loaded or engine disabled          // return if engine disabled
337          if (EngineDisabled.Pop()) {          if (EngineDisabled.Pop()) {
338              dmsg(5,("gig::Engine: engine disabled (val=%d)\n",EngineDisabled.GetUnsafe()));              dmsg(5,("gig::Engine: engine disabled (val=%d)\n",EngineDisabled.GetUnsafe()));
339              return 0;              return 0;
340          }          }
         if (!pInstrument) {  
             dmsg(5,("gig::Engine: no instrument loaded\n"));  
             return 0;  
         }  
341    
342            // update time of start and end of this audio fragment (as events' time stamps relate to this)
343            pEventGenerator->UpdateFragmentTime(Samples);
344    
345          // empty the event lists for the new fragment          // We only allow a maximum of CONFIG_MAX_VOICES voices to be spawned
346          pEvents->clear();          // in each audio fragment. All subsequent request for spawning new
347          pCCEvents->clear();          // voices in the same audio fragment will be ignored.
348          for (uint i = 0; i < Event::destination_count; i++) {          VoiceSpawnsLeft = CONFIG_MAX_VOICES;
349              pSynthesisEvents[i]->clear();  
350            // get all events from the engine's global input event queue which belong to the current fragment
351            // (these are usually just SysEx messages)
352            ImportEvents(Samples);
353    
354            // process engine global events (these are currently only MIDI System Exclusive messages)
355            {
356                RTList<Event>::Iterator itEvent = pGlobalEvents->first();
357                RTList<Event>::Iterator end     = pGlobalEvents->end();
358                for (; itEvent != end; ++itEvent) {
359                    switch (itEvent->Type) {
360                        case Event::type_sysex:
361                            dmsg(5,("Engine: Sysex received\n"));
362                            ProcessSysex(itEvent);
363                            break;
364                    }
365                }
366          }          }
367    
368          // read and copy events from input queue          // reset internal voice counter (just for statistic of active voices)
369          Event event = pEventGenerator->CreateEvent();          ActiveVoiceCountTemp = 0;
         while (true) {  
             if (!pEventQueue->pop(&event)) break;  
             pEvents->alloc_assign(event);  
         }  
370    
371            // handle events on all engine channels
372            for (int i = 0; i < engineChannels.size(); i++) {
373                if (!engineChannels[i]->pInstrument) continue; // ignore if no instrument loaded
374                ProcessEvents(engineChannels[i], Samples);
375            }
376    
377          // update time of start and end of this audio fragment (as events' time stamps relate to this)          // render all 'normal', active voices on all engine channels
378          pEventGenerator->UpdateFragmentTime(Samples);          for (int i = 0; i < engineChannels.size(); i++) {
379                if (!engineChannels[i]->pInstrument) continue; // ignore if no instrument loaded
380                RenderActiveVoices(engineChannels[i], Samples);
381            }
382    
383            // now that all ordinary voices on ALL engine channels are rendered, render new stolen voices
384            RenderStolenVoices(Samples);
385    
386          // process events          // handle cleanup on all engine channels for the next audio fragment
387          Event* pNextEvent = pEvents->first();          for (int i = 0; i < engineChannels.size(); i++) {
388          while (pNextEvent) {              if (!engineChannels[i]->pInstrument) continue; // ignore if no instrument loaded
389              Event* pEvent = pNextEvent;              PostProcess(engineChannels[i]);
             pEvents->set_current(pEvent);  
             pNextEvent = pEvents->next();  
             switch (pEvent->Type) {  
                 case Event::type_note_on:  
                     dmsg(5,("Audio Thread: Note on received\n"));  
                     ProcessNoteOn(pEvent);  
                     break;  
                 case Event::type_note_off:  
                     dmsg(5,("Audio Thread: Note off received\n"));  
                     ProcessNoteOff(pEvent);  
                     break;  
                 case Event::type_control_change:  
                     dmsg(5,("Audio Thread: MIDI CC received\n"));  
                     ProcessControlChange(pEvent);  
                     break;  
                 case Event::type_pitchbend:  
                     dmsg(5,("Audio Thread: Pitchbend received\n"));  
                     ProcessPitchbend(pEvent);  
                     break;  
             }  
390          }          }
391    
392    
393          // render audio from all active voices          // empty the engine's event list for the next audio fragment
394          int active_voices = 0;          ClearEventLists();
         uint* piKey = pActiveKeys->first();  
         while (piKey) { // iterate through all active keys  
             midi_key_info_t* pKey = &pMIDIKeyInfo[*piKey];  
             pActiveKeys->set_current(piKey);  
             piKey = pActiveKeys->next();  
   
             Voice* pVoiceNext = pKey->pActiveVoices->first();  
             while (pVoiceNext) { // iterate through all voices on this key  
                 // already get next voice on key  
                 Voice* pVoice = pVoiceNext;  
                 pKey->pActiveVoices->set_current(pVoice);  
                 pVoiceNext = pKey->pActiveVoices->next();  
   
                 // now render current voice  
                 pVoice->Render(Samples);  
                 if (pVoice->IsActive()) active_voices++; // still active  
                 else { // voice reached end, is now inactive  
                     KillVoice(pVoice); // remove voice from the list of active voices  
                 }  
             }  
             pKey->pEvents->clear(); // free all events on the key  
         }  
395    
396            // reset voice stealing for the next audio fragment
397            pVoiceStealingQueue->clear();
398    
399          // write that to the disk thread class so that it can print it          // just some statistics about this engine instance
400          // on the console for debugging purposes          ActiveVoiceCount = ActiveVoiceCountTemp;
         ActiveVoiceCount = active_voices;  
401          if (ActiveVoiceCount > ActiveVoiceCountMax) ActiveVoiceCountMax = ActiveVoiceCount;          if (ActiveVoiceCount > ActiveVoiceCountMax) ActiveVoiceCountMax = ActiveVoiceCount;
402    
403            FrameTime += Samples;
404    
405          return 0;          return 0;
406      }      }
407    
408      /**      /**
409       *  Will be called by the MIDIIn Thread to let the audio thread trigger a new       * Dispatch and handle all events in this audio fragment for the given
410       *  voice for the given key.       * engine channel.
411       *       *
412       *  @param Key      - MIDI key number of the triggered key       * @param pEngineChannel - engine channel on which events should be
413       *  @param Velocity - MIDI velocity value of the triggered key       *                         processed
414         * @param Samples        - amount of sample points to be processed in
415         *                         this audio fragment cycle
416       */       */
417      void Engine::SendNoteOn(uint8_t Key, uint8_t Velocity) {      void Engine::ProcessEvents(EngineChannel* pEngineChannel, uint Samples) {
418          Event event    = pEventGenerator->CreateEvent();          // get all events from the engine channels's input event queue which belong to the current fragment
419          event.Type     = Event::type_note_on;          // (these are the common events like NoteOn, NoteOff, ControlChange, etc.)
420          event.Key      = Key;          pEngineChannel->ImportEvents(Samples);
421          event.Velocity = Velocity;  
422          if (this->pEventQueue->write_space() > 0) this->pEventQueue->push(&event);          // process events
423          else dmsg(1,("Engine: Input event queue full!"));          {
424                RTList<Event>::Iterator itEvent = pEngineChannel->pEvents->first();
425                RTList<Event>::Iterator end     = pEngineChannel->pEvents->end();
426                for (; itEvent != end; ++itEvent) {
427                    switch (itEvent->Type) {
428                        case Event::type_note_on:
429                            dmsg(5,("Engine: Note on received\n"));
430                            ProcessNoteOn((EngineChannel*)itEvent->pEngineChannel, itEvent);
431                            break;
432                        case Event::type_note_off:
433                            dmsg(5,("Engine: Note off received\n"));
434                            ProcessNoteOff((EngineChannel*)itEvent->pEngineChannel, itEvent);
435                            break;
436                        case Event::type_control_change:
437                            dmsg(5,("Engine: MIDI CC received\n"));
438                            ProcessControlChange((EngineChannel*)itEvent->pEngineChannel, itEvent);
439                            break;
440                        case Event::type_pitchbend:
441                            dmsg(5,("Engine: Pitchbend received\n"));
442                            ProcessPitchbend((EngineChannel*)itEvent->pEngineChannel, itEvent);
443                            break;
444                    }
445                }
446            }
447    
448            // reset voice stealing for the next engine channel (or next audio fragment)
449            itLastStolenVoice         = RTList<Voice>::Iterator();
450            itLastStolenVoiceGlobally = RTList<Voice>::Iterator();
451            iuiLastStolenKey          = RTList<uint>::Iterator();
452            iuiLastStolenKeyGlobally  = RTList<uint>::Iterator();
453            pLastStolenChannel        = NULL;
454      }      }
455    
456      /**      /**
457       *  Will be called by the MIDIIn Thread to signal the audio thread to release       * Render all 'normal' voices (that is voices which were not stolen in
458       *  voice(s) on the given key.       * this fragment) on the given engine channel.
459       *       *
460       *  @param Key      - MIDI key number of the released key       * @param pEngineChannel - engine channel on which audio should be
461       *  @param Velocity - MIDI release velocity value of the released key       *                         rendered
462         * @param Samples        - amount of sample points to be rendered in
463         *                         this audio fragment cycle
464       */       */
465      void Engine::SendNoteOff(uint8_t Key, uint8_t Velocity) {      void Engine::RenderActiveVoices(EngineChannel* pEngineChannel, uint Samples) {
466          Event event    = pEventGenerator->CreateEvent();          #if !CONFIG_PROCESS_MUTED_CHANNELS
467          event.Type     = Event::type_note_off;          if (pEngineChannel->GetMute()) return; // skip if sampler channel is muted
468          event.Key      = Key;          #endif
469          event.Velocity = Velocity;  
470          if (this->pEventQueue->write_space() > 0) this->pEventQueue->push(&event);          RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();
471          else dmsg(1,("Engine: Input event queue full!"));          RTList<uint>::Iterator end    = pEngineChannel->pActiveKeys->end();
472            while (iuiKey != end) { // iterate through all active keys
473                midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];
474                ++iuiKey;
475    
476                RTList<Voice>::Iterator itVoice     = pKey->pActiveVoices->first();
477                RTList<Voice>::Iterator itVoicesEnd = pKey->pActiveVoices->end();
478                for (; itVoice != itVoicesEnd; ++itVoice) { // iterate through all voices on this key
479                    // now render current voice
480                    itVoice->Render(Samples);
481                    if (itVoice->IsActive()) ActiveVoiceCountTemp++; // still active
482                    else { // voice reached end, is now inactive
483                        FreeVoice(pEngineChannel, itVoice); // remove voice from the list of active voices
484                    }
485                }
486            }
487      }      }
488    
489      /**      /**
490       *  Will be called by the MIDIIn Thread to signal the audio thread to change       * Render all stolen voices (only voices which were stolen in this
491       *  the pitch value for all voices.       * fragment) on the given engine channel. Stolen voices are rendered
492         * after all normal voices have been rendered; this is needed to render
493         * audio of those voices which were selected for voice stealing until
494         * the point were the stealing (that is the take over of the voice)
495         * actually happened.
496       *       *
497       *  @param Pitch - MIDI pitch value (-8192 ... +8191)       * @param pEngineChannel - engine channel on which audio should be
498         *                         rendered
499         * @param Samples        - amount of sample points to be rendered in
500         *                         this audio fragment cycle
501       */       */
502      void Engine::SendPitchbend(int Pitch) {      void Engine::RenderStolenVoices(uint Samples) {
503          Event event = pEventGenerator->CreateEvent();          RTList<Event>::Iterator itVoiceStealEvent = pVoiceStealingQueue->first();
504          event.Type  = Event::type_pitchbend;          RTList<Event>::Iterator end               = pVoiceStealingQueue->end();
505          event.Pitch = Pitch;          for (; itVoiceStealEvent != end; ++itVoiceStealEvent) {
506          if (this->pEventQueue->write_space() > 0) this->pEventQueue->push(&event);              EngineChannel* pEngineChannel = (EngineChannel*) itVoiceStealEvent->pEngineChannel;
507          else dmsg(1,("Engine: Input event queue full!"));              Pool<Voice>::Iterator itNewVoice =
508                    LaunchVoice(pEngineChannel, itVoiceStealEvent, itVoiceStealEvent->Param.Note.Layer, itVoiceStealEvent->Param.Note.ReleaseTrigger, false, false);
509                if (itNewVoice) {
510                    itNewVoice->Render(Samples);
511                    if (itNewVoice->IsActive()) ActiveVoiceCountTemp++; // still active
512                    else { // voice reached end, is now inactive
513                        FreeVoice(pEngineChannel, itNewVoice); // remove voice from the list of active voices
514                    }
515                }
516                else dmsg(1,("gig::Engine: ERROR, voice stealing didn't work out!\n"));
517    
518                // we need to clear the key's event list explicitly here in case key was never active
519                midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[itVoiceStealEvent->Param.Note.Key];
520                pKey->VoiceTheftsQueued--;
521                if (!pKey->Active && !pKey->VoiceTheftsQueued) pKey->pEvents->clear();
522            }
523        }
524    
525        /**
526         * Free all keys which have turned inactive in this audio fragment, from
527         * the list of active keys and clear all event lists on that engine
528         * channel.
529         *
530         * @param pEngineChannel - engine channel to cleanup
531         */
532        void Engine::PostProcess(EngineChannel* pEngineChannel) {
533            // free all keys which have no active voices left
534            {
535                RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();
536                RTList<uint>::Iterator end    = pEngineChannel->pActiveKeys->end();
537                while (iuiKey != end) { // iterate through all active keys
538                    midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];
539                    ++iuiKey;
540                    if (pKey->pActiveVoices->isEmpty()) FreeKey(pEngineChannel, pKey);
541                    #if CONFIG_DEVMODE
542                    else { // just a sanity check for debugging
543                        RTList<Voice>::Iterator itVoice     = pKey->pActiveVoices->first();
544                        RTList<Voice>::Iterator itVoicesEnd = pKey->pActiveVoices->end();
545                        for (; itVoice != itVoicesEnd; ++itVoice) { // iterate through all voices on this key
546                            if (itVoice->itKillEvent) {
547                                dmsg(1,("gig::Engine: ERROR, killed voice survived !!!\n"));
548                            }
549                        }
550                    }
551                    #endif // CONFIG_DEVMODE
552                }
553            }
554    
555            // empty the engine channel's own event lists
556            pEngineChannel->ClearEventLists();
557      }      }
558    
559      /**      /**
560       *  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
561       *  continuous controller value has changed.       *  exclusive message has arrived.
562       *       *
563       *  @param Controller - MIDI controller number of the occured control change       *  @param pData - pointer to sysex data
564       *  @param Value      - value of the control change       *  @param Size  - lenght of sysex data (in bytes)
565       */       */
566      void Engine::SendControlChange(uint8_t Controller, uint8_t Value) {      void Engine::SendSysex(void* pData, uint Size) {
567          Event event      = pEventGenerator->CreateEvent();          Event event             = pEventGenerator->CreateEvent();
568          event.Type       = Event::type_control_change;          event.Type              = Event::type_sysex;
569          event.Controller = Controller;          event.Param.Sysex.Size  = Size;
570          event.Value      = Value;          event.pEngineChannel    = NULL; // as Engine global event
571          if (this->pEventQueue->write_space() > 0) this->pEventQueue->push(&event);          if (pEventQueue->write_space() > 0) {
572                if (pSysexBuffer->write_space() >= Size) {
573                    // copy sysex data to input buffer
574                    uint toWrite = Size;
575                    uint8_t* pPos = (uint8_t*) pData;
576                    while (toWrite) {
577                        const uint writeNow = RTMath::Min(toWrite, pSysexBuffer->write_space_to_end());
578                        pSysexBuffer->write(pPos, writeNow);
579                        toWrite -= writeNow;
580                        pPos    += writeNow;
581    
582                    }
583                    // finally place sysex event into input event queue
584                    pEventQueue->push(&event);
585                }
586                else dmsg(1,("Engine: Sysex message too large (%d byte) for input buffer (%d byte)!",Size,CONFIG_SYSEX_BUFFER_SIZE));
587            }
588          else dmsg(1,("Engine: Input event queue full!"));          else dmsg(1,("Engine: Input event queue full!"));
589      }      }
590    
591      /**      /**
592       *  Assigns and triggers a new voice for the respective MIDI key.       *  Assigns and triggers a new voice for the respective MIDI key.
593       *       *
594       *  @param pNoteOnEvent - key, velocity and time stamp of the event       *  @param pEngineChannel - engine channel on which this event occured on
595         *  @param itNoteOnEvent - key, velocity and time stamp of the event
596       */       */
597      void Engine::ProcessNoteOn(Event* pNoteOnEvent) {      void Engine::ProcessNoteOn(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOnEvent) {
598          midi_key_info_t* pKey = &pMIDIKeyInfo[pNoteOnEvent->Key];          #if !CONFIG_PROCESS_MUTED_CHANNELS
599            if (pEngineChannel->GetMute()) return; // skip if sampler channel is muted
600            #endif
601    
602            const int key = itNoteOnEvent->Param.Note.Key;
603    
604            // Change key dimension value if key is in keyswitching area
605            {
606                const ::gig::Instrument* pInstrument = pEngineChannel->pInstrument;
607                if (key >= pInstrument->DimensionKeyRange.low && key <= pInstrument->DimensionKeyRange.high)
608                    pEngineChannel->CurrentKeyDimension = ((key - pInstrument->DimensionKeyRange.low) * 128) /
609                        (pInstrument->DimensionKeyRange.high - pInstrument->DimensionKeyRange.low + 1);
610            }
611    
612            midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[key];
613    
614          pKey->KeyPressed = true; // the MIDI key was now pressed down          pKey->KeyPressed = true; // the MIDI key was now pressed down
615            pKey->Velocity   = itNoteOnEvent->Param.Note.Velocity;
616            pKey->NoteOnTime = FrameTime + itNoteOnEvent->FragmentPos(); // will be used to calculate note length
617    
618          // cancel release process of voices on this key if needed          // cancel release process of voices on this key if needed
619          if (pKey->Active && !SustainPedal) {          if (pKey->Active && !pEngineChannel->SustainPedal) {
620              pNoteOnEvent->Type = Event::type_cancel_release; // transform event type              RTList<Event>::Iterator itCancelReleaseEvent = pKey->pEvents->allocAppend();
621              pEvents->move(pNoteOnEvent, pKey->pEvents); // move event to the key's own event list              if (itCancelReleaseEvent) {
622                    *itCancelReleaseEvent = *itNoteOnEvent;                  // copy event
623                    itCancelReleaseEvent->Type = Event::type_cancel_release; // transform event type
624                }
625                else dmsg(1,("Event pool emtpy!\n"));
626          }          }
627    
628          // allocate a new voice for the key          // move note on event to the key's own event list
629          Voice* pNewVoice = pKey->pActiveVoices->alloc();          RTList<Event>::Iterator itNoteOnEventOnKeyList = itNoteOnEvent.moveToEndOf(pKey->pEvents);
630          if (pNewVoice) {  
631              // launch the new voice          // allocate and trigger new voice(s) for the key
632              if (pNewVoice->Trigger(pNoteOnEvent, this->Pitch, this->pInstrument) < 0) {          {
633                  dmsg(1,("Triggering new voice failed!\n"));              // first, get total amount of required voices (dependant on amount of layers)
634                  pKey->pActiveVoices->free(pNewVoice);              ::gig::Region* pRegion = pEngineChannel->pInstrument->GetRegion(itNoteOnEventOnKeyList->Param.Note.Key);
635              }              if (pRegion) {
636              else if (!pKey->Active) { // mark as active key                  int voicesRequired = pRegion->Layers;
637                  pKey->Active = true;                  // now launch the required amount of voices
638                  pKey->pSelf  = pActiveKeys->alloc();                  for (int i = 0; i < voicesRequired; i++)
639                  *pKey->pSelf = pNoteOnEvent->Key;                      LaunchVoice(pEngineChannel, itNoteOnEventOnKeyList, i, false, true, true);
640              }              }
641          }          }
642          else std::cerr << "No free voice!" << std::endl << std::flush;  
643            // if neither a voice was spawned or postponed then remove note on event from key again
644            if (!pKey->Active && !pKey->VoiceTheftsQueued)
645                pKey->pEvents->free(itNoteOnEventOnKeyList);
646    
647            pKey->RoundRobinIndex++;
648      }      }
649    
650      /**      /**
# Line 515  namespace LinuxSampler { namespace gig { Line 653  namespace LinuxSampler { namespace gig {
653       *  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.
654       *  due to completion of sample playback).       *  due to completion of sample playback).
655       *       *
656       *  @param pNoteOffEvent - key, velocity and time stamp of the event       *  @param pEngineChannel - engine channel on which this event occured on
657         *  @param itNoteOffEvent - key, velocity and time stamp of the event
658       */       */
659      void Engine::ProcessNoteOff(Event* pNoteOffEvent) {      void Engine::ProcessNoteOff(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOffEvent) {
660          midi_key_info_t* pKey = &pMIDIKeyInfo[pNoteOffEvent->Key];          #if !CONFIG_PROCESS_MUTED_CHANNELS
661            if (pEngineChannel->GetMute()) return; // skip if sampler channel is muted
662            #endif
663    
664            midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[itNoteOffEvent->Param.Note.Key];
665          pKey->KeyPressed = false; // the MIDI key was now released          pKey->KeyPressed = false; // the MIDI key was now released
666    
667          // release voices on this key if needed          // release voices on this key if needed
668          if (pKey->Active && !SustainPedal) {          if (pKey->Active && !pEngineChannel->SustainPedal) {
669              pNoteOffEvent->Type = Event::type_release; // transform event type              itNoteOffEvent->Type = Event::type_release; // transform event type
670              pEvents->move(pNoteOffEvent, pKey->pEvents); // move event to the key's own event list  
671                // move event to the key's own event list
672                RTList<Event>::Iterator itNoteOffEventOnKeyList = itNoteOffEvent.moveToEndOf(pKey->pEvents);
673    
674                // spawn release triggered voice(s) if needed
675                if (pKey->ReleaseTrigger) {
676                    // first, get total amount of required voices (dependant on amount of layers)
677                    ::gig::Region* pRegion = pEngineChannel->pInstrument->GetRegion(itNoteOffEventOnKeyList->Param.Note.Key);
678                    if (pRegion) {
679                        int voicesRequired = pRegion->Layers;
680    
681                        // MIDI note-on velocity is used instead of note-off velocity
682                        itNoteOffEventOnKeyList->Param.Note.Velocity = pKey->Velocity;
683    
684                        // now launch the required amount of voices
685                        for (int i = 0; i < voicesRequired; i++)
686                            LaunchVoice(pEngineChannel, itNoteOffEventOnKeyList, i, true, false, false); //FIXME: for the moment we don't perform voice stealing for release triggered samples
687                    }
688                    pKey->ReleaseTrigger = false;
689                }
690    
691                // if neither a voice was spawned or postponed then remove note off event from key again
692                if (!pKey->Active && !pKey->VoiceTheftsQueued)
693                    pKey->pEvents->free(itNoteOffEventOnKeyList);
694          }          }
695      }      }
696    
697      /**      /**
698       *  Moves pitchbend event from the general (input) event list to the pitch       *  Moves pitchbend event from the general (input) event list to the engine
699       *  event list.       *  channel's event list. It will actually processed later by the
700         *  respective voice.
701         *
702         *  @param pEngineChannel - engine channel on which this event occured on
703         *  @param itPitchbendEvent - absolute pitch value and time stamp of the event
704         */
705        void Engine::ProcessPitchbend(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itPitchbendEvent) {
706            pEngineChannel->Pitch = itPitchbendEvent->Param.Pitch.Pitch; // store current pitch value
707        }
708    
709        /**
710         *  Allocates and triggers a new voice. This method will usually be
711         *  called by the ProcessNoteOn() method and by the voices itself
712         *  (e.g. to spawn further voices on the same key for layered sounds).
713       *       *
714       *  @param pPitchbendEvent - absolute pitch value and time stamp of the event       *  @param pEngineChannel      - engine channel on which this event occured on
715         *  @param itNoteOnEvent       - key, velocity and time stamp of the event
716         *  @param iLayer              - layer index for the new voice (optional - only
717         *                               in case of layered sounds of course)
718         *  @param ReleaseTriggerVoice - if new voice is a release triggered voice
719         *                               (optional, default = false)
720         *  @param VoiceStealing       - if voice stealing should be performed
721         *                               when there is no free voice
722         *                               (optional, default = true)
723         *  @param HandleKeyGroupConflicts - if voices should be killed due to a
724         *                                   key group conflict
725         *  @returns pointer to new voice or NULL if there was no free voice or
726         *           if the voice wasn't triggered (for example when no region is
727         *           defined for the given key).
728       */       */
729      void Engine::ProcessPitchbend(Event* pPitchbendEvent) {      Pool<Voice>::Iterator Engine::LaunchVoice(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOnEvent, int iLayer, bool ReleaseTriggerVoice, bool VoiceStealing, bool HandleKeyGroupConflicts) {
730          this->Pitch = pPitchbendEvent->Pitch; // store current pitch value          int MIDIKey            = itNoteOnEvent->Param.Note.Key;
731          pEvents->move(pPitchbendEvent, pSynthesisEvents[Event::destination_vco]);          midi_key_info_t* pKey  = &pEngineChannel->pMIDIKeyInfo[MIDIKey];
732            ::gig::Region* pRegion = pEngineChannel->pInstrument->GetRegion(MIDIKey);
733    
734            // if nothing defined for this key
735            if (!pRegion) return Pool<Voice>::Iterator(); // nothing to do
736    
737            // only mark the first voice of a layered voice (group) to be in a
738            // key group, so the layered voices won't kill each other
739            int iKeyGroup = (iLayer == 0 && !ReleaseTriggerVoice) ? pRegion->KeyGroup : 0;
740    
741            // handle key group (a.k.a. exclusive group) conflicts
742            if (HandleKeyGroupConflicts) {
743                if (iKeyGroup) { // if this voice / key belongs to a key group
744                    uint** ppKeyGroup = &pEngineChannel->ActiveKeyGroups[iKeyGroup];
745                    if (*ppKeyGroup) { // if there's already an active key in that key group
746                        midi_key_info_t* pOtherKey = &pEngineChannel->pMIDIKeyInfo[**ppKeyGroup];
747                        // kill all voices on the (other) key
748                        RTList<Voice>::Iterator itVoiceToBeKilled = pOtherKey->pActiveVoices->first();
749                        RTList<Voice>::Iterator end               = pOtherKey->pActiveVoices->end();
750                        for (; itVoiceToBeKilled != end; ++itVoiceToBeKilled) {
751                            if (itVoiceToBeKilled->Type != Voice::type_release_trigger) {
752                                itVoiceToBeKilled->Kill(itNoteOnEvent);
753                                --VoiceSpawnsLeft; //FIXME: just a hack, we should better check in StealVoice() if the voice was killed due to key conflict
754                            }
755                        }
756                    }
757                }
758            }
759    
760            Voice::type_t VoiceType = Voice::type_normal;
761    
762            // get current dimension values to select the right dimension region
763            //TODO: for stolen voices this dimension region selection block is processed twice, this should be changed
764            //FIXME: controller values for selecting the dimension region here are currently not sample accurate
765            uint DimValues[8] = { 0 };
766            for (int i = pRegion->Dimensions - 1; i >= 0; i--) {
767                switch (pRegion->pDimensionDefinitions[i].dimension) {
768                    case ::gig::dimension_samplechannel:
769                        DimValues[i] = 0; //TODO: we currently ignore this dimension
770                        break;
771                    case ::gig::dimension_layer:
772                        DimValues[i] = iLayer;
773                        break;
774                    case ::gig::dimension_velocity:
775                        DimValues[i] = itNoteOnEvent->Param.Note.Velocity;
776                        break;
777                    case ::gig::dimension_channelaftertouch:
778                        DimValues[i] = 0; //TODO: we currently ignore this dimension
779                        break;
780                    case ::gig::dimension_releasetrigger:
781                        VoiceType = (ReleaseTriggerVoice) ? Voice::type_release_trigger : (!iLayer) ? Voice::type_release_trigger_required : Voice::type_normal;
782                        DimValues[i] = (uint) ReleaseTriggerVoice;
783                        break;
784                    case ::gig::dimension_keyboard:
785                        DimValues[i] = (uint) pEngineChannel->CurrentKeyDimension;
786                        break;
787                    case ::gig::dimension_roundrobin:
788                        DimValues[i] = (uint) pEngineChannel->pMIDIKeyInfo[MIDIKey].RoundRobinIndex; // incremented for each note on
789                        break;
790                    case ::gig::dimension_random:
791                        RandomSeed   = RandomSeed * 1103515245 + 12345; // classic pseudo random number generator
792                        DimValues[i] = (uint) RandomSeed >> (32 - pRegion->pDimensionDefinitions[i].bits); // highest bits are most random
793                        break;
794                    case ::gig::dimension_modwheel:
795                        DimValues[i] = pEngineChannel->ControllerTable[1];
796                        break;
797                    case ::gig::dimension_breath:
798                        DimValues[i] = pEngineChannel->ControllerTable[2];
799                        break;
800                    case ::gig::dimension_foot:
801                        DimValues[i] = pEngineChannel->ControllerTable[4];
802                        break;
803                    case ::gig::dimension_portamentotime:
804                        DimValues[i] = pEngineChannel->ControllerTable[5];
805                        break;
806                    case ::gig::dimension_effect1:
807                        DimValues[i] = pEngineChannel->ControllerTable[12];
808                        break;
809                    case ::gig::dimension_effect2:
810                        DimValues[i] = pEngineChannel->ControllerTable[13];
811                        break;
812                    case ::gig::dimension_genpurpose1:
813                        DimValues[i] = pEngineChannel->ControllerTable[16];
814                        break;
815                    case ::gig::dimension_genpurpose2:
816                        DimValues[i] = pEngineChannel->ControllerTable[17];
817                        break;
818                    case ::gig::dimension_genpurpose3:
819                        DimValues[i] = pEngineChannel->ControllerTable[18];
820                        break;
821                    case ::gig::dimension_genpurpose4:
822                        DimValues[i] = pEngineChannel->ControllerTable[19];
823                        break;
824                    case ::gig::dimension_sustainpedal:
825                        DimValues[i] = pEngineChannel->ControllerTable[64];
826                        break;
827                    case ::gig::dimension_portamento:
828                        DimValues[i] = pEngineChannel->ControllerTable[65];
829                        break;
830                    case ::gig::dimension_sostenutopedal:
831                        DimValues[i] = pEngineChannel->ControllerTable[66];
832                        break;
833                    case ::gig::dimension_softpedal:
834                        DimValues[i] = pEngineChannel->ControllerTable[67];
835                        break;
836                    case ::gig::dimension_genpurpose5:
837                        DimValues[i] = pEngineChannel->ControllerTable[80];
838                        break;
839                    case ::gig::dimension_genpurpose6:
840                        DimValues[i] = pEngineChannel->ControllerTable[81];
841                        break;
842                    case ::gig::dimension_genpurpose7:
843                        DimValues[i] = pEngineChannel->ControllerTable[82];
844                        break;
845                    case ::gig::dimension_genpurpose8:
846                        DimValues[i] = pEngineChannel->ControllerTable[83];
847                        break;
848                    case ::gig::dimension_effect1depth:
849                        DimValues[i] = pEngineChannel->ControllerTable[91];
850                        break;
851                    case ::gig::dimension_effect2depth:
852                        DimValues[i] = pEngineChannel->ControllerTable[92];
853                        break;
854                    case ::gig::dimension_effect3depth:
855                        DimValues[i] = pEngineChannel->ControllerTable[93];
856                        break;
857                    case ::gig::dimension_effect4depth:
858                        DimValues[i] = pEngineChannel->ControllerTable[94];
859                        break;
860                    case ::gig::dimension_effect5depth:
861                        DimValues[i] = pEngineChannel->ControllerTable[95];
862                        break;
863                    case ::gig::dimension_none:
864                        std::cerr << "gig::Engine::LaunchVoice() Error: dimension=none\n" << std::flush;
865                        break;
866                    default:
867                        std::cerr << "gig::Engine::LaunchVoice() Error: Unknown dimension\n" << std::flush;
868                }
869            }
870            ::gig::DimensionRegion* pDimRgn = pRegion->GetDimensionRegionByValue(DimValues);
871    
872            // no need to continue if sample is silent
873            if (!pDimRgn->pSample || !pDimRgn->pSample->SamplesTotal) return Pool<Voice>::Iterator();
874    
875            // allocate a new voice for the key
876            Pool<Voice>::Iterator itNewVoice = pKey->pActiveVoices->allocAppend();
877            if (itNewVoice) {
878                // launch the new voice
879                if (itNewVoice->Trigger(pEngineChannel, itNoteOnEvent, pEngineChannel->Pitch, pDimRgn, VoiceType, iKeyGroup) < 0) {
880                    dmsg(4,("Voice not triggered\n"));
881                    pKey->pActiveVoices->free(itNewVoice);
882                }
883                else { // on success
884                    --VoiceSpawnsLeft;
885                    if (!pKey->Active) { // mark as active key
886                        pKey->Active = true;
887                        pKey->itSelf = pEngineChannel->pActiveKeys->allocAppend();
888                        *pKey->itSelf = itNoteOnEvent->Param.Note.Key;
889                    }
890                    if (itNewVoice->KeyGroup) {
891                        uint** ppKeyGroup = &pEngineChannel->ActiveKeyGroups[itNewVoice->KeyGroup];
892                        *ppKeyGroup = &*pKey->itSelf; // put key as the (new) active key to its key group
893                    }
894                    if (itNewVoice->Type == Voice::type_release_trigger_required) pKey->ReleaseTrigger = true; // mark key for the need of release triggered voice(s)
895                    return itNewVoice; // success
896                }
897            }
898            else if (VoiceStealing) {
899                // try to steal one voice
900                int result = StealVoice(pEngineChannel, itNoteOnEvent);
901                if (!result) { // voice stolen successfully
902                    // put note-on event into voice-stealing queue, so it will be reprocessed after killed voice died
903                    RTList<Event>::Iterator itStealEvent = pVoiceStealingQueue->allocAppend();
904                    if (itStealEvent) {
905                        *itStealEvent = *itNoteOnEvent; // copy event
906                        itStealEvent->Param.Note.Layer = iLayer;
907                        itStealEvent->Param.Note.ReleaseTrigger = ReleaseTriggerVoice;
908                        pKey->VoiceTheftsQueued++;
909                    }
910                    else dmsg(1,("Voice stealing queue full!\n"));
911                }
912            }
913    
914            return Pool<Voice>::Iterator(); // no free voice or error
915      }      }
916    
917      /**      /**
918       *  Immediately kills the voice given with pVoice (no matter if sustain is       *  Will be called by LaunchVoice() method in case there are no free
919       *  pressed or not) and removes it from the MIDI key's list of active voice.       *  voices left. This method will select and kill one old voice for
920       *  This method will e.g. be called if a voice went inactive by itself.       *  voice stealing and postpone the note-on event until the selected
921         *  voice actually died.
922       *       *
923       *  @param pVoice - points to the voice to be killed       *  @param pEngineChannel - engine channel on which this event occured on
924         *  @param itNoteOnEvent - key, velocity and time stamp of the event
925         *  @returns 0 on success, a value < 0 if no active voice could be picked for voice stealing
926       */       */
927      void Engine::KillVoice(Voice* pVoice) {      int Engine::StealVoice(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOnEvent) {
928          if (pVoice) {          if (VoiceSpawnsLeft <= 0) {
929              if (pVoice->IsActive()) pVoice->Kill();              dmsg(1,("Max. voice thefts per audio fragment reached (you may raise CONFIG_MAX_VOICES).\n"));
930                return -1;
931            }
932            if (!pEventPool->poolIsEmpty()) {
933    
934                RTList<Voice>::Iterator itSelectedVoice;
935    
936                // Select one voice for voice stealing
937                switch (CONFIG_VOICE_STEAL_ALGO) {
938    
939                    // try to pick the oldest voice on the key where the new
940                    // voice should be spawned, if there is no voice on that
941                    // key, or no voice left to kill, then procceed with
942                    // 'oldestkey' algorithm
943                    case voice_steal_algo_oldestvoiceonkey: {
944                        midi_key_info_t* pSelectedKey = &pEngineChannel->pMIDIKeyInfo[itNoteOnEvent->Param.Note.Key];
945                        itSelectedVoice = pSelectedKey->pActiveVoices->first();
946                        // proceed iterating if voice was created in this fragment cycle
947                        while (itSelectedVoice && !itSelectedVoice->IsStealable()) ++itSelectedVoice;
948                        // if we haven't found a voice then proceed with algorithm 'oldestkey'
949                        if (itSelectedVoice && itSelectedVoice->IsStealable()) break;
950                    } // no break - intentional !
951    
952                    // try to pick the oldest voice on the oldest active key
953                    // from the same engine channel
954                    // (caution: must stay after 'oldestvoiceonkey' algorithm !)
955                    case voice_steal_algo_oldestkey: {
956                        // if we already stole in this fragment, try to proceed on same key
957                        if (this->itLastStolenVoice) {
958                            itSelectedVoice = this->itLastStolenVoice;
959                            do {
960                                ++itSelectedVoice;
961                            } while (itSelectedVoice && !itSelectedVoice->IsStealable()); // proceed iterating if voice was created in this fragment cycle
962                            // found a "stealable" voice ?
963                            if (itSelectedVoice && itSelectedVoice->IsStealable()) {
964                                // remember which voice we stole, so we can simply proceed on next voice stealing
965                                this->itLastStolenVoice = itSelectedVoice;
966                                break; // selection succeeded
967                            }
968                        }
969                        // get (next) oldest key
970                        RTList<uint>::Iterator iuiSelectedKey = (this->iuiLastStolenKey) ? ++this->iuiLastStolenKey : pEngineChannel->pActiveKeys->first();
971                        while (iuiSelectedKey) {
972                            midi_key_info_t* pSelectedKey = &pEngineChannel->pMIDIKeyInfo[*iuiSelectedKey];
973                            itSelectedVoice = pSelectedKey->pActiveVoices->first();
974                            // proceed iterating if voice was created in this fragment cycle
975                            while (itSelectedVoice && !itSelectedVoice->IsStealable()) ++itSelectedVoice;
976                            // found a "stealable" voice ?
977                            if (itSelectedVoice && itSelectedVoice->IsStealable()) {
978                                // remember which voice on which key we stole, so we can simply proceed on next voice stealing
979                                this->iuiLastStolenKey  = iuiSelectedKey;
980                                this->itLastStolenVoice = itSelectedVoice;
981                                break; // selection succeeded
982                            }
983                            ++iuiSelectedKey; // get next oldest key
984                        }
985                        break;
986                    }
987    
988              midi_key_info_t* pKey = &pMIDIKeyInfo[pVoice->MIDIKey];                  // don't steal anything
989                    case voice_steal_algo_none:
990                    default: {
991                        dmsg(1,("No free voice (voice stealing disabled)!\n"));
992                        return -1;
993                    }
994                }
995    
996                // if we couldn't steal a voice from the same engine channel then
997                // steal oldest voice on the oldest key from any other engine channel
998                // (the smaller engine channel number, the higher priority)
999                if (!itSelectedVoice || !itSelectedVoice->IsStealable()) {
1000                    EngineChannel* pSelectedChannel;
1001                    int            iChannelIndex;
1002                    // select engine channel
1003                    if (pLastStolenChannel) {
1004                        pSelectedChannel = pLastStolenChannel;
1005                        iChannelIndex    = pSelectedChannel->iEngineIndexSelf;
1006                    } else { // pick the engine channel followed by this engine channel
1007                        iChannelIndex    = (pEngineChannel->iEngineIndexSelf + 1) % engineChannels.size();
1008                        pSelectedChannel = engineChannels[iChannelIndex];
1009                    }
1010    
1011                    // if we already stole in this fragment, try to proceed on same key
1012                    if (this->itLastStolenVoiceGlobally) {
1013                        itSelectedVoice = this->itLastStolenVoiceGlobally;
1014                        do {
1015                            ++itSelectedVoice;
1016                        } while (itSelectedVoice && !itSelectedVoice->IsStealable()); // proceed iterating if voice was created in this fragment cycle
1017                    }
1018    
1019                    #if CONFIG_DEVMODE
1020                    EngineChannel* pBegin = pSelectedChannel; // to detect endless loop
1021                    #endif // CONFIG_DEVMODE
1022    
1023                    // did we find a 'stealable' voice?
1024                    if (itSelectedVoice && itSelectedVoice->IsStealable()) {
1025                        // remember which voice we stole, so we can simply proceed on next voice stealing
1026                        this->itLastStolenVoiceGlobally = itSelectedVoice;
1027                    } else while (true) { // iterate through engine channels
1028                        // get (next) oldest key
1029                        RTList<uint>::Iterator iuiSelectedKey = (this->iuiLastStolenKeyGlobally) ? ++this->iuiLastStolenKeyGlobally : pSelectedChannel->pActiveKeys->first();
1030                        this->iuiLastStolenKeyGlobally = RTList<uint>::Iterator(); // to prevent endless loop (see line above)
1031                        while (iuiSelectedKey) {
1032                            midi_key_info_t* pSelectedKey = &pSelectedChannel->pMIDIKeyInfo[*iuiSelectedKey];
1033                            itSelectedVoice = pSelectedKey->pActiveVoices->first();
1034                            // proceed iterating if voice was created in this fragment cycle
1035                            while (itSelectedVoice && !itSelectedVoice->IsStealable()) ++itSelectedVoice;
1036                            // found a "stealable" voice ?
1037                            if (itSelectedVoice && itSelectedVoice->IsStealable()) {
1038                                // remember which voice on which key on which engine channel we stole, so we can simply proceed on next voice stealing
1039                                this->iuiLastStolenKeyGlobally  = iuiSelectedKey;
1040                                this->itLastStolenVoiceGlobally = itSelectedVoice;
1041                                this->pLastStolenChannel        = pSelectedChannel;
1042                                goto stealable_voice_found; // selection succeeded
1043                            }
1044                            ++iuiSelectedKey; // get next key on current engine channel
1045                        }
1046                        // get next engine channel
1047                        iChannelIndex    = (iChannelIndex + 1) % engineChannels.size();
1048                        pSelectedChannel = engineChannels[iChannelIndex];
1049    
1050                        #if CONFIG_DEVMODE
1051                        if (pSelectedChannel == pBegin) {
1052                            dmsg(1,("FATAL ERROR: voice stealing endless loop!\n"));
1053                            dmsg(1,("VoiceSpawnsLeft=%d.\n", VoiceSpawnsLeft));
1054                            dmsg(1,("Exiting.\n"));
1055                            exit(-1);
1056                        }
1057                        #endif // CONFIG_DEVMODE
1058                    }
1059                }
1060    
1061                // jump point if a 'stealable' voice was found
1062                stealable_voice_found:
1063    
1064                #if CONFIG_DEVMODE
1065                if (!itSelectedVoice->IsActive()) {
1066                    dmsg(1,("gig::Engine: ERROR, tried to steal a voice which was not active !!!\n"));
1067                    return -1;
1068                }
1069                #endif // CONFIG_DEVMODE
1070    
1071                // now kill the selected voice
1072                itSelectedVoice->Kill(itNoteOnEvent);
1073    
1074                --VoiceSpawnsLeft;
1075    
1076                return 0; // success
1077            }
1078            else {
1079                dmsg(1,("Event pool emtpy!\n"));
1080                return -1;
1081            }
1082        }
1083    
1084        /**
1085         *  Removes the given voice from the MIDI key's list of active voices.
1086         *  This method will be called when a voice went inactive, e.g. because
1087         *  it finished to playback its sample, finished its release stage or
1088         *  just was killed.
1089         *
1090         *  @param pEngineChannel - engine channel on which this event occured on
1091         *  @param itVoice - points to the voice to be freed
1092         */
1093        void Engine::FreeVoice(EngineChannel* pEngineChannel, Pool<Voice>::Iterator& itVoice) {
1094            if (itVoice) {
1095                midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[itVoice->MIDIKey];
1096    
1097                uint keygroup = itVoice->KeyGroup;
1098    
1099              // free the voice object              // free the voice object
1100              pVoicePool->free(pVoice);              pVoicePool->free(itVoice);
1101    
1102              // 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
1103              if (pKey->pActiveVoices->is_empty()) {              if (pKey->pActiveVoices->isEmpty() && keygroup) {
1104                  pKey->Active = false;                  uint** ppKeyGroup = &pEngineChannel->ActiveKeyGroups[keygroup];
1105                  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"));  
1106              }              }
1107          }          }
1108          else std::cerr << "Couldn't release voice! (pVoice == NULL)\n" << std::flush;          else std::cerr << "Couldn't release voice! (!itVoice)\n" << std::flush;
1109        }
1110    
1111        /**
1112         *  Called when there's no more voice left on a key, this call will
1113         *  update the key info respectively.
1114         *
1115         *  @param pEngineChannel - engine channel on which this event occured on
1116         *  @param pKey - key which is now inactive
1117         */
1118        void Engine::FreeKey(EngineChannel* pEngineChannel, midi_key_info_t* pKey) {
1119            if (pKey->pActiveVoices->isEmpty()) {
1120                pKey->Active = false;
1121                pEngineChannel->pActiveKeys->free(pKey->itSelf); // remove key from list of active keys
1122                pKey->itSelf = RTList<uint>::Iterator();
1123                pKey->ReleaseTrigger = false;
1124                pKey->pEvents->clear();
1125                dmsg(3,("Key has no more voices now\n"));
1126            }
1127            else dmsg(1,("gig::Engine: Oops, tried to free a key which contains voices.\n"));
1128      }      }
1129    
1130      /**      /**
1131       *  Reacts on supported control change commands (e.g. pitch bend wheel,       *  Reacts on supported control change commands (e.g. pitch bend wheel,
1132       *  modulation wheel, aftertouch).       *  modulation wheel, aftertouch).
1133       *       *
1134       *  @param pControlChangeEvent - controller, value and time stamp of the event       *  @param pEngineChannel - engine channel on which this event occured on
1135         *  @param itControlChangeEvent - controller, value and time stamp of the event
1136       */       */
1137      void Engine::ProcessControlChange(Event* pControlChangeEvent) {      void Engine::ProcessControlChange(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itControlChangeEvent) {
1138          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));
1139    
1140          switch (pControlChangeEvent->Controller) {          // update controller value in the engine channel's controller table
1141              case 64: {          pEngineChannel->ControllerTable[itControlChangeEvent->Param.CC.Controller] = itControlChangeEvent->Param.CC.Value;
1142                  if (pControlChangeEvent->Value >= 64 && !SustainPedal) {  
1143            switch (itControlChangeEvent->Param.CC.Controller) {
1144                case 7: { // volume
1145                    //TODO: not sample accurate yet
1146                    pEngineChannel->GlobalVolume = (float) itControlChangeEvent->Param.CC.Value / 127.0f;
1147                    pEngineChannel->bStatusChanged = true; // engine channel status has changed, so set notify flag
1148                    break;
1149                }
1150                case 10: { // panpot
1151                    //TODO: not sample accurate yet
1152                    const int pan = (int) itControlChangeEvent->Param.CC.Value - 64;
1153                    pEngineChannel->GlobalPanLeft  = 1.0f - float(RTMath::Max(pan, 0)) /  63.0f;
1154                    pEngineChannel->GlobalPanRight = 1.0f - float(RTMath::Min(pan, 0)) / -64.0f;
1155                    break;
1156                }
1157                case 64: { // sustain
1158                    if (itControlChangeEvent->Param.CC.Value >= 64 && !pEngineChannel->SustainPedal) {
1159                      dmsg(4,("PEDAL DOWN\n"));                      dmsg(4,("PEDAL DOWN\n"));
1160                      SustainPedal = true;                      pEngineChannel->SustainPedal = true;
1161    
1162                        #if !CONFIG_PROCESS_MUTED_CHANNELS
1163                        if (pEngineChannel->GetMute()) return; // skip if sampler channel is muted
1164                        #endif
1165    
1166                      // cancel release process of voices if necessary                      // cancel release process of voices if necessary
1167                      uint* piKey = pActiveKeys->first();                      RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();
1168                      if (piKey) {                      for (; iuiKey; ++iuiKey) {
1169                          pControlChangeEvent->Type = Event::type_cancel_release; // transform event type                          midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];
1170                          while (piKey) {                          if (!pKey->KeyPressed) {
1171                              midi_key_info_t* pKey = &pMIDIKeyInfo[*piKey];                              RTList<Event>::Iterator itNewEvent = pKey->pEvents->allocAppend();
1172                              pActiveKeys->set_current(piKey);                              if (itNewEvent) {
1173                              piKey = pActiveKeys->next();                                  *itNewEvent = *itControlChangeEvent; // copy event to the key's own event list
1174                              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"));  
1175                              }                              }
1176                                else dmsg(1,("Event pool emtpy!\n"));
1177                          }                          }
1178                      }                      }
1179                  }                  }
1180                  if (pControlChangeEvent->Value < 64 && SustainPedal) {                  if (itControlChangeEvent->Param.CC.Value < 64 && pEngineChannel->SustainPedal) {
1181                      dmsg(4,("PEDAL UP\n"));                      dmsg(4,("PEDAL UP\n"));
1182                      SustainPedal = false;                      pEngineChannel->SustainPedal = false;
1183    
1184                        #if !CONFIG_PROCESS_MUTED_CHANNELS
1185                        if (pEngineChannel->GetMute()) return; // skip if sampler channel is muted
1186                        #endif
1187    
1188                      // release voices if their respective key is not pressed                      // release voices if their respective key is not pressed
1189                      uint* piKey = pActiveKeys->first();                      RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();
1190                      if (piKey) {                      for (; iuiKey; ++iuiKey) {
1191                          pControlChangeEvent->Type = Event::type_release; // transform event type                          midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];
1192                          while (piKey) {                          if (!pKey->KeyPressed) {
1193                              midi_key_info_t* pKey = &pMIDIKeyInfo[*piKey];                              RTList<Event>::Iterator itNewEvent = pKey->pEvents->allocAppend();
1194                              pActiveKeys->set_current(piKey);                              if (itNewEvent) {
1195                              piKey = pActiveKeys->next();                                  *itNewEvent = *itControlChangeEvent; // copy event to the key's own event list
1196                              if (!pKey->KeyPressed) {                                  itNewEvent->Type = Event::type_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"));  
1197                              }                              }
1198                                else dmsg(1,("Event pool emtpy!\n"));
1199                          }                          }
1200                      }                      }
1201                  }                  }
1202                  break;                  break;
1203              }              }
1204    
1205    
1206                // Channel Mode Messages
1207    
1208                case 120: { // all sound off
1209                    KillAllVoices(pEngineChannel, itControlChangeEvent);
1210                    break;
1211                }
1212                case 121: { // reset all controllers
1213                    pEngineChannel->ResetControllers();
1214                    break;
1215                }
1216                case 123: { // all notes off
1217                    ReleaseAllVoices(pEngineChannel, itControlChangeEvent);
1218                    break;
1219                }
1220            }
1221        }
1222    
1223        /**
1224         *  Reacts on MIDI system exclusive messages.
1225         *
1226         *  @param itSysexEvent - sysex data size and time stamp of the sysex event
1227         */
1228        void Engine::ProcessSysex(Pool<Event>::Iterator& itSysexEvent) {
1229            RingBuffer<uint8_t>::NonVolatileReader reader = pSysexBuffer->get_non_volatile_reader();
1230    
1231            uint8_t exclusive_status, id;
1232            if (!reader.pop(&exclusive_status)) goto free_sysex_data;
1233            if (!reader.pop(&id))               goto free_sysex_data;
1234            if (exclusive_status != 0xF0)       goto free_sysex_data;
1235    
1236            switch (id) {
1237                case 0x41: { // Roland
1238                    dmsg(3,("Roland Sysex\n"));
1239                    uint8_t device_id, model_id, cmd_id;
1240                    if (!reader.pop(&device_id)) goto free_sysex_data;
1241                    if (!reader.pop(&model_id))  goto free_sysex_data;
1242                    if (!reader.pop(&cmd_id))    goto free_sysex_data;
1243                    if (model_id != 0x42 /*GS*/) goto free_sysex_data;
1244                    if (cmd_id != 0x12 /*DT1*/)  goto free_sysex_data;
1245    
1246                    // command address
1247                    uint8_t addr[3]; // 2 byte addr MSB, followed by 1 byte addr LSB)
1248                    const RingBuffer<uint8_t>::NonVolatileReader checksum_reader = reader; // so we can calculate the check sum later
1249                    if (reader.read(&addr[0], 3) != 3) goto free_sysex_data;
1250                    if (addr[0] == 0x40 && addr[1] == 0x00) { // System Parameters
1251                        dmsg(3,("\tSystem Parameter\n"));
1252                    }
1253                    else if (addr[0] == 0x40 && addr[1] == 0x01) { // Common Parameters
1254                        dmsg(3,("\tCommon Parameter\n"));
1255                    }
1256                    else if (addr[0] == 0x40 && (addr[1] & 0xf0) == 0x10) { // Part Parameters (1)
1257                        dmsg(3,("\tPart Parameter\n"));
1258                        switch (addr[2]) {
1259                            case 0x40: { // scale tuning
1260                                dmsg(3,("\t\tScale Tuning\n"));
1261                                uint8_t scale_tunes[12]; // detuning of all 12 semitones of an octave
1262                                if (reader.read(&scale_tunes[0], 12) != 12) goto free_sysex_data;
1263                                uint8_t checksum;
1264                                if (!reader.pop(&checksum)) goto free_sysex_data;
1265                                #if CONFIG_ASSERT_GS_SYSEX_CHECKSUM
1266                                if (GSCheckSum(checksum_reader, 12)) goto free_sysex_data;
1267                                #endif // CONFIG_ASSERT_GS_SYSEX_CHECKSUM
1268                                for (int i = 0; i < 12; i++) scale_tunes[i] -= 64;
1269                                AdjustScale((int8_t*) scale_tunes);
1270                                dmsg(3,("\t\t\tNew scale applied.\n"));
1271                                break;
1272                            }
1273                        }
1274                    }
1275                    else if (addr[0] == 0x40 && (addr[1] & 0xf0) == 0x20) { // Part Parameters (2)
1276                    }
1277                    else if (addr[0] == 0x41) { // Drum Setup Parameters
1278                    }
1279                    break;
1280                }
1281          }          }
1282    
1283          // update controller value in the engine's controller table          free_sysex_data: // finally free sysex data
1284          ControllerTable[pControlChangeEvent->Controller] = pControlChangeEvent->Value;          pSysexBuffer->increment_read_ptr(itSysexEvent->Param.Sysex.Size);
1285        }
1286    
1287          // move event from the unsorted event list to the control change event list      /**
1288          pEvents->move(pControlChangeEvent, pCCEvents);       * Calculates the Roland GS sysex check sum.
1289         *
1290         * @param AddrReader - reader which currently points to the first GS
1291         *                     command address byte of the GS sysex message in
1292         *                     question
1293         * @param DataSize   - size of the GS message data (in bytes)
1294         */
1295        uint8_t Engine::GSCheckSum(const RingBuffer<uint8_t>::NonVolatileReader AddrReader, uint DataSize) {
1296            RingBuffer<uint8_t>::NonVolatileReader reader = AddrReader;
1297            uint bytes = 3 /*addr*/ + DataSize;
1298            uint8_t addr_and_data[bytes];
1299            reader.read(&addr_and_data[0], bytes);
1300            uint8_t sum = 0;
1301            for (uint i = 0; i < bytes; i++) sum += addr_and_data[i];
1302            return 128 - sum % 128;
1303      }      }
1304    
1305      /**      /**
1306       * Initialize the parameter sequence for the modulation destination given by       * Allows to tune each of the twelve semitones of an octave.
1307       * by 'dst' with the constant value given by val.       *
1308         * @param ScaleTunes - detuning of all twelve semitones (in cents)
1309       */       */
1310      void Engine::ResetSynthesisParameters(Event::destination_t dst, float val) {      void Engine::AdjustScale(int8_t ScaleTunes[12]) {
1311          int maxsamples = pAudioOutputDevice->MaxSamplesPerCycle();          memcpy(&this->ScaleTuning[0], &ScaleTunes[0], 12); //TODO: currently not sample accurate
         for (int i = 0; i < maxsamples; i++) pSynthesisParameters[dst][i] = val;  
1312      }      }
1313    
1314      float Engine::Volume() {      /**
1315          return GlobalVolume;       * Releases all voices on an engine channel. All voices will go into
1316         * the release stage and thus it might take some time (e.g. dependant to
1317         * their envelope release time) until they actually die.
1318         *
1319         * @param pEngineChannel - engine channel on which all voices should be released
1320         * @param itReleaseEvent - event which caused this releasing of all voices
1321         */
1322        void Engine::ReleaseAllVoices(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itReleaseEvent) {
1323            RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();
1324            while (iuiKey) {
1325                midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];
1326                ++iuiKey;
1327                // append a 'release' event to the key's own event list
1328                RTList<Event>::Iterator itNewEvent = pKey->pEvents->allocAppend();
1329                if (itNewEvent) {
1330                    *itNewEvent = *itReleaseEvent; // copy original event (to the key's event list)
1331                    itNewEvent->Type = Event::type_release; // transform event type
1332                }
1333                else dmsg(1,("Event pool emtpy!\n"));
1334            }
1335      }      }
1336    
1337      void Engine::Volume(float f) {      /**
1338          GlobalVolume = f;       * Kills all voices on an engine channel as soon as possible. Voices
1339         * won't get into release state, their volume level will be ramped down
1340         * as fast as possible.
1341         *
1342         * @param pEngineChannel - engine channel on which all voices should be killed
1343         * @param itKillEvent    - event which caused this killing of all voices
1344         */
1345        void Engine::KillAllVoices(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itKillEvent) {
1346            RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();
1347            RTList<uint>::Iterator end    = pEngineChannel->pActiveKeys->end();
1348            while (iuiKey != end) { // iterate through all active keys
1349                midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];
1350                ++iuiKey;
1351                RTList<Voice>::Iterator itVoice     = pKey->pActiveVoices->first();
1352                RTList<Voice>::Iterator itVoicesEnd = pKey->pActiveVoices->end();
1353                for (; itVoice != itVoicesEnd; ++itVoice) { // iterate through all voices on this key
1354                    itVoice->Kill(itKillEvent);
1355                    --VoiceSpawnsLeft; //FIXME: just a temporary workaround, we should check the cause in StealVoice() instead
1356                }
1357            }
1358      }      }
1359    
1360      uint Engine::VoiceCount() {      uint Engine::VoiceCount() {
# Line 674  namespace LinuxSampler { namespace gig { Line 1385  namespace LinuxSampler { namespace gig {
1385          return pDiskThread->GetBufferFillPercentage();          return pDiskThread->GetBufferFillPercentage();
1386      }      }
1387    
1388        String Engine::EngineName() {
1389            return LS_GIG_ENGINE_NAME;
1390        }
1391    
1392      String Engine::Description() {      String Engine::Description() {
1393          return "Gigasampler Engine";          return "Gigasampler Engine";
1394      }      }
1395    
1396      String Engine::Version() {      String Engine::Version() {
1397          return "0.0.1-0cvs20040423";          String s = "$Revision: 1.54 $";
1398            return s.substr(11, s.size() - 13); // cut dollar signs, spaces and CVS macro keyword
1399      }      }
1400    
1401  }} // namespace LinuxSampler::gig  }} // namespace LinuxSampler::gig
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