/[svn]/linuxsampler/trunk/src/engines/gig/Engine.cpp
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revision 53 by schoenebeck, Mon Apr 26 17:15:51 2004 UTC revision 649 by schoenebeck, Wed Jun 15 00:01:28 2005 UTC
# Line 2  Line 2 
2   *                                                                         *   *                                                                         *
3   *   LinuxSampler - modular, streaming capable sampler                     *   *   LinuxSampler - modular, streaming capable sampler                     *
4   *                                                                         *   *                                                                         *
5   *   Copyright (C) 2003 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    #if defined(__APPLE__)
33    # include <stdlib.h>
34    #else
35    # include <malloc.h>
36    #endif
37    
38  namespace LinuxSampler { namespace gig {  namespace LinuxSampler { namespace gig {
39    
40      InstrumentResourceManager Engine::Instruments;      InstrumentResourceManager Engine::instruments;
41    
42        std::map<AudioOutputDevice*,Engine*> Engine::engines;
43    
44        /**
45         * Get a gig::Engine object for the given gig::EngineChannel and the
46         * given AudioOutputDevice. All engine channels which are connected to
47         * the same audio output device will use the same engine instance. This
48         * method will be called by a gig::EngineChannel whenever it's
49         * connecting to a audio output device.
50         *
51         * @param pChannel - engine channel which acquires an engine object
52         * @param pDevice  - the audio output device \a pChannel is connected to
53         */
54        Engine* Engine::AcquireEngine(LinuxSampler::gig::EngineChannel* pChannel, AudioOutputDevice* pDevice) {
55            Engine* pEngine = NULL;
56            // check if there's already an engine for the given audio output device
57            if (engines.count(pDevice)) {
58                dmsg(4,("Using existing gig::Engine.\n"));
59                pEngine = engines[pDevice];
60            } else { // create a new engine (and disk thread) instance for the given audio output device
61                dmsg(4,("Creating new gig::Engine.\n"));
62                pEngine = (Engine*) EngineFactory::Create("gig");
63                pEngine->Connect(pDevice);
64                engines[pDevice] = pEngine;
65            }
66            // register engine channel to the engine instance
67            pEngine->engineChannels.add(pChannel);
68            // remember index in the ArrayList
69            pChannel->iEngineIndexSelf = pEngine->engineChannels.size() - 1;
70            dmsg(4,("This gig::Engine has now %d EngineChannels.\n",pEngine->engineChannels.size()));
71            return pEngine;
72        }
73    
74        /**
75         * Once an engine channel is disconnected from an audio output device,
76         * it wil immediately call this method to unregister itself from the
77         * engine instance and if that engine instance is not used by any other
78         * engine channel anymore, then that engine instance will be destroyed.
79         *
80         * @param pChannel - engine channel which wants to disconnect from it's
81         *                   engine instance
82         * @param pDevice  - audio output device \a pChannel was connected to
83         */
84        void Engine::FreeEngine(LinuxSampler::gig::EngineChannel* pChannel, AudioOutputDevice* pDevice) {
85            dmsg(4,("Disconnecting EngineChannel from gig::Engine.\n"));
86            Engine* pEngine = engines[pDevice];
87            // unregister EngineChannel from the Engine instance
88            pEngine->engineChannels.remove(pChannel);
89            // if the used Engine instance is not used anymore, then destroy it
90            if (pEngine->engineChannels.empty()) {
91                pDevice->Disconnect(pEngine);
92                engines.erase(pDevice);
93                delete pEngine;
94                dmsg(4,("Destroying gig::Engine.\n"));
95            }
96            else dmsg(4,("This gig::Engine has now %d EngineChannels.\n",pEngine->engineChannels.size()));
97        }
98    
99        /**
100         * Constructor
101         */
102      Engine::Engine() {      Engine::Engine() {
         pRIFF              = NULL;  
         pGig               = NULL;  
         pInstrument        = NULL;  
103          pAudioOutputDevice = NULL;          pAudioOutputDevice = NULL;
104          pDiskThread        = NULL;          pDiskThread        = NULL;
105          pEventGenerator    = NULL;          pEventGenerator    = NULL;
106          pEventQueue        = new RingBuffer<Event>(MAX_EVENTS_PER_FRAGMENT);          pSysexBuffer       = new RingBuffer<uint8_t>(CONFIG_SYSEX_BUFFER_SIZE, 0);
107          pEventPool         = new RTELMemoryPool<Event>(MAX_EVENTS_PER_FRAGMENT);          pEventQueue        = new RingBuffer<Event>(CONFIG_MAX_EVENTS_PER_FRAGMENT, 0);
108          pVoicePool         = new RTELMemoryPool<Voice>(MAX_AUDIO_VOICES);          pEventPool         = new Pool<Event>(CONFIG_MAX_EVENTS_PER_FRAGMENT);
109          pActiveKeys        = new RTELMemoryPool<uint>(128);          pVoicePool         = new Pool<Voice>(CONFIG_MAX_VOICES);
110          pEvents            = new RTEList<Event>(pEventPool);          pVoiceStealingQueue = new RTList<Event>(pEventPool);
111          pCCEvents          = new RTEList<Event>(pEventPool);          pGlobalEvents      = new RTList<Event>(pEventPool);
112          for (uint i = 0; i < Event::destination_count; i++) {          for (RTList<Voice>::Iterator iterVoice = pVoicePool->allocAppend(); iterVoice == pVoicePool->last(); iterVoice = pVoicePool->allocAppend()) {
113              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);  
114          }          }
115          pVoicePool->clear();          pVoicePool->clear();
116    
117          pSynthesisParameters[0] = NULL; // we allocate when an audio device is connected          pSynthesisParameters[0] = NULL; // we allocate when an audio device is connected
118            pBasicFilterParameters  = NULL;
119            pMainFilterParameters   = NULL;
120    
121          ResetInternal();          ResetInternal();
122      }      }
123    
124        /**
125         * Destructor
126         */
127      Engine::~Engine() {      Engine::~Engine() {
128          if (pDiskThread) {          if (pDiskThread) {
129                dmsg(1,("Stopping disk thread..."));
130              pDiskThread->StopThread();              pDiskThread->StopThread();
131              delete pDiskThread;              delete pDiskThread;
132                dmsg(1,("OK\n"));
133          }          }
         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;  
134          if (pEventQueue) delete pEventQueue;          if (pEventQueue) delete pEventQueue;
135          if (pEventPool)  delete pEventPool;          if (pEventPool)  delete pEventPool;
136          if (pVoicePool)  delete pVoicePool;          if (pVoicePool) {
137          if (pActiveKeys) delete pActiveKeys;              pVoicePool->clear();
138                delete pVoicePool;
139            }
140          if (pEventGenerator) delete pEventGenerator;          if (pEventGenerator) delete pEventGenerator;
141          if (pSynthesisParameters[0]) delete[] pSynthesisParameters[0];          if (pMainFilterParameters) delete[] pMainFilterParameters;
142            if (pBasicFilterParameters) delete[] pBasicFilterParameters;
143            if (pSynthesisParameters[0]) free(pSynthesisParameters[0]);
144            if (pVoiceStealingQueue) delete pVoiceStealingQueue;
145            if (pSysexBuffer) delete pSysexBuffer;
146            EngineFactory::Destroy(this);
147      }      }
148    
149      void Engine::Enable() {      void Engine::Enable() {
150          dmsg(3,("gig::Engine: enabling\n"));          dmsg(3,("gig::Engine: enabling\n"));
151          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)
152          dmsg(1,("gig::Engine: enabled (val=%d)\n", EngineDisabled.GetUnsafe()));          dmsg(3,("gig::Engine: enabled (val=%d)\n", EngineDisabled.GetUnsafe()));
153      }      }
154    
155      void Engine::Disable() {      void Engine::Disable() {
# Line 112  namespace LinuxSampler { namespace gig { Line 170  namespace LinuxSampler { namespace gig {
170       */       */
171      void Engine::Reset() {      void Engine::Reset() {
172          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();  
   
173          ResetInternal();          ResetInternal();
   
         // signal audio thread to continue with rendering  
         //SuspensionRequested = false;  
174          Enable();          Enable();
175      }      }
176    
# Line 138  namespace LinuxSampler { namespace gig { Line 179  namespace LinuxSampler { namespace gig {
179       *  control and status variables. This method is not thread safe!       *  control and status variables. This method is not thread safe!
180       */       */
181      void Engine::ResetInternal() {      void Engine::ResetInternal() {
         Pitch               = 0;  
         SustainPedal        = false;  
182          ActiveVoiceCount    = 0;          ActiveVoiceCount    = 0;
183          ActiveVoiceCountMax = 0;          ActiveVoiceCountMax = 0;
184    
185          // set all MIDI controller values to zero          // reset voice stealing parameters
186          memset(ControllerTable, 0x00, 128);          pVoiceStealingQueue->clear();
187            itLastStolenVoice          = RTList<Voice>::Iterator();
188            itLastStolenVoiceGlobally  = RTList<Voice>::Iterator();
189            iuiLastStolenKey           = RTList<uint>::Iterator();
190            iuiLastStolenKeyGlobally   = RTList<uint>::Iterator();
191            pLastStolenChannel         = NULL;
192    
193          // reset key info          // reset to normal chromatic scale (means equal temper)
194          for (uint i = 0; i < 128; i++) {          memset(&ScaleTuning[0], 0x00, 12);
             pMIDIKeyInfo[i].pActiveVoices->clear();  
             pMIDIKeyInfo[i].pEvents->clear();  
             pMIDIKeyInfo[i].KeyPressed = false;  
             pMIDIKeyInfo[i].Active     = false;  
             pMIDIKeyInfo[i].pSelf      = NULL;  
         }  
195    
196          // reset all voices          // reset all voices
197          for (Voice* pVoice = pVoicePool->alloc(); pVoice; pVoice = pVoicePool->alloc()) {          for (RTList<Voice>::Iterator iterVoice = pVoicePool->allocAppend(); iterVoice == pVoicePool->last(); iterVoice = pVoicePool->allocAppend()) {
198              pVoice->Reset();              iterVoice->Reset();
199          }          }
200          pVoicePool->clear();          pVoicePool->clear();
201    
         // free all active keys  
         pActiveKeys->clear();  
   
202          // reset disk thread          // reset disk thread
203          if (pDiskThread) pDiskThread->Reset();          if (pDiskThread) pDiskThread->Reset();
204    
# Line 172  namespace LinuxSampler { namespace gig { Line 207  namespace LinuxSampler { namespace gig {
207      }      }
208    
209      /**      /**
210       *  Load an instrument from a .gig file.       * Connect this engine instance with the given audio output device.
211         * This method will be called when an Engine instance is created.
212         * All of the engine's data structures which are dependant to the used
213         * audio output device / driver will be (re)allocated and / or
214         * adjusted appropriately.
215       *       *
216       *  @param FileName   - file name of the Gigasampler instrument file       * @param pAudioOut - audio output device to connect to
      *  @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.  
      */  
     void Engine::ResourceToBeUpdated(::gig::Instrument* pResource, void*& pUpdateArg) {  
         dmsg(3,("gig::Engine: Received instrument update message.\n"));  
         DisableAndLock();  
         ResetInternal();  
         this->pInstrument = NULL;  
     }  
   
     /**  
      * Will be called by the InstrumentResourceManager when the instrument  
      * update process was completed, so we can continue with playback.  
217       */       */
     void Engine::ResourceUpdated(::gig::Instrument* pOldResource, ::gig::Instrument* pNewResource, void* pUpdateArg) {  
         this->pInstrument = pNewResource;  
         Enable();  
     }  
   
218      void Engine::Connect(AudioOutputDevice* pAudioOut) {      void Engine::Connect(AudioOutputDevice* pAudioOut) {
219          pAudioOutputDevice = pAudioOut;          pAudioOutputDevice = pAudioOut;
220    
# Line 261  namespace LinuxSampler { namespace gig { Line 229  namespace LinuxSampler { namespace gig {
229              throw LinuxSamplerException(msg);              throw LinuxSamplerException(msg);
230          }          }
231    
232            this->MaxSamplesPerCycle = pAudioOutputDevice->MaxSamplesPerCycle();
233            this->SampleRate         = pAudioOutputDevice->SampleRate();
234    
235            // FIXME: audio drivers with varying fragment sizes might be a problem here
236            MaxFadeOutPos = MaxSamplesPerCycle - int(double(SampleRate) * CONFIG_EG_MIN_RELEASE_TIME) - 1;
237            if (MaxFadeOutPos < 0)
238                throw LinuxSamplerException("CONFIG_EG_MIN_RELEASE_TIME too big for current audio fragment size / sampling rate!");
239    
240          // (re)create disk thread          // (re)create disk thread
241          if (this->pDiskThread) {          if (this->pDiskThread) {
242                dmsg(1,("Stopping disk thread..."));
243              this->pDiskThread->StopThread();              this->pDiskThread->StopThread();
244              delete this->pDiskThread;              delete this->pDiskThread;
245                dmsg(1,("OK\n"));
246          }          }
247          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
248          if (!pDiskThread) {          if (!pDiskThread) {
249              dmsg(0,("gig::Engine  new diskthread = NULL\n"));              dmsg(0,("gig::Engine  new diskthread = NULL\n"));
250              exit(EXIT_FAILURE);              exit(EXIT_FAILURE);
251          }          }
252    
253          for (Voice* pVoice = pVoicePool->alloc(); pVoice; pVoice = pVoicePool->alloc()) {          for (RTList<Voice>::Iterator iterVoice = pVoicePool->allocAppend(); iterVoice == pVoicePool->last(); iterVoice = pVoicePool->allocAppend()) {
254              pVoice->pDiskThread = this->pDiskThread;              iterVoice->pDiskThread = this->pDiskThread;
             pVoice->SetOutput(pAudioOut);  
255              dmsg(3,("d"));              dmsg(3,("d"));
256          }          }
257          pVoicePool->clear();          pVoicePool->clear();
# Line 284  namespace LinuxSampler { namespace gig { Line 261  namespace LinuxSampler { namespace gig {
261          pEventGenerator = new EventGenerator(pAudioOut->SampleRate());          pEventGenerator = new EventGenerator(pAudioOut->SampleRate());
262    
263          // (re)allocate synthesis parameter matrix          // (re)allocate synthesis parameter matrix
264          if (pSynthesisParameters[0]) delete[] pSynthesisParameters[0];          if (pSynthesisParameters[0]) free(pSynthesisParameters[0]);
265          pSynthesisParameters[0] = new float[Event::destination_count * pAudioOut->MaxSamplesPerCycle()];  
266            #if defined(__APPLE__)
267            pSynthesisParameters[0] = (float *) malloc(Event::destination_count * sizeof(float) * pAudioOut->MaxSamplesPerCycle());
268            #else
269            pSynthesisParameters[0] = (float *) memalign(16,(Event::destination_count * sizeof(float) * pAudioOut->MaxSamplesPerCycle()));
270            #endif
271          for (int dst = 1; dst < Event::destination_count; dst++)          for (int dst = 1; dst < Event::destination_count; dst++)
272              pSynthesisParameters[dst] = pSynthesisParameters[dst - 1] + pAudioOut->MaxSamplesPerCycle();              pSynthesisParameters[dst] = pSynthesisParameters[dst - 1] + pAudioOut->MaxSamplesPerCycle();
273    
274            // (re)allocate biquad filter parameter sequence
275            if (pBasicFilterParameters) delete[] pBasicFilterParameters;
276            if (pMainFilterParameters)  delete[] pMainFilterParameters;
277            pBasicFilterParameters = new biquad_param_t[pAudioOut->MaxSamplesPerCycle()];
278            pMainFilterParameters  = new biquad_param_t[pAudioOut->MaxSamplesPerCycle()];
279    
280          dmsg(1,("Starting disk thread..."));          dmsg(1,("Starting disk thread..."));
281          pDiskThread->StartThread();          pDiskThread->StartThread();
282          dmsg(1,("OK\n"));          dmsg(1,("OK\n"));
283    
284          for (Voice* pVoice = pVoicePool->first(); pVoice; pVoice = pVoicePool->next()) {          for (RTList<Voice>::Iterator iterVoice = pVoicePool->allocAppend(); iterVoice == pVoicePool->last(); iterVoice = pVoicePool->allocAppend()) {
285              if (!pVoice->pDiskThread) {              if (!iterVoice->pDiskThread) {
286                  dmsg(0,("Engine -> voice::trigger: !pDiskThread\n"));                  dmsg(0,("Engine -> voice::trigger: !pDiskThread\n"));
287                  exit(EXIT_FAILURE);                  exit(EXIT_FAILURE);
288              }              }
289          }          }
290      }      }
291    
292      void Engine::DisconnectAudioOutputDevice() {      /**
293          if (pAudioOutputDevice) { // if clause to prevent disconnect loops       * Clear all engine global event lists.
294              AudioOutputDevice* olddevice = pAudioOutputDevice;       */
295              pAudioOutputDevice = NULL;      void Engine::ClearEventLists() {
296              olddevice->Disconnect(this);          pGlobalEvents->clear();
297        }
298    
299        /**
300         * Copy all events from the engine's global input queue buffer to the
301         * engine's internal event list. This will be done at the beginning of
302         * each audio cycle (that is each RenderAudio() call) to distinguish
303         * all global events which have to be processed in the current audio
304         * cycle. These events are usually just SysEx messages. Every
305         * EngineChannel has it's own input event queue buffer and event list
306         * to handle common events like NoteOn, NoteOff and ControlChange
307         * events.
308         *
309         * @param Samples - number of sample points to be processed in the
310         *                  current audio cycle
311         */
312        void Engine::ImportEvents(uint Samples) {
313            RingBuffer<Event>::NonVolatileReader eventQueueReader = pEventQueue->get_non_volatile_reader();
314            Event* pEvent;
315            while (true) {
316                // get next event from input event queue
317                if (!(pEvent = eventQueueReader.pop())) break;
318                // if younger event reached, ignore that and all subsequent ones for now
319                if (pEvent->FragmentPos() >= Samples) {
320                    eventQueueReader--;
321                    dmsg(2,("Younger Event, pos=%d ,Samples=%d!\n",pEvent->FragmentPos(),Samples));
322                    pEvent->ResetFragmentPos();
323                    break;
324                }
325                // copy event to internal event list
326                if (pGlobalEvents->poolIsEmpty()) {
327                    dmsg(1,("Event pool emtpy!\n"));
328                    break;
329                }
330                *pGlobalEvents->allocAppend() = *pEvent;
331          }          }
332            eventQueueReader.free(); // free all copied events from input queue
333      }      }
334    
335      /**      /**
# Line 322  namespace LinuxSampler { namespace gig { Line 345  namespace LinuxSampler { namespace gig {
345      int Engine::RenderAudio(uint Samples) {      int Engine::RenderAudio(uint Samples) {
346          dmsg(5,("RenderAudio(Samples=%d)\n", Samples));          dmsg(5,("RenderAudio(Samples=%d)\n", Samples));
347    
348          // return if no instrument loaded or engine disabled          // return if engine disabled
349          if (EngineDisabled.Pop()) {          if (EngineDisabled.Pop()) {
350              dmsg(5,("gig::Engine: engine disabled (val=%d)\n",EngineDisabled.GetUnsafe()));              dmsg(5,("gig::Engine: engine disabled (val=%d)\n",EngineDisabled.GetUnsafe()));
351              return 0;              return 0;
352          }          }
         if (!pInstrument) {  
             dmsg(5,("gig::Engine: no instrument loaded\n"));  
             return 0;  
         }  
353    
354            // update time of start and end of this audio fragment (as events' time stamps relate to this)
355            pEventGenerator->UpdateFragmentTime(Samples);
356    
357          // empty the event lists for the new fragment          // get all events from the engine's global input event queue which belong to the current fragment
358          pEvents->clear();          // (these are usually just SysEx messages)
359          pCCEvents->clear();          ImportEvents(Samples);
360          for (uint i = 0; i < Event::destination_count; i++) {  
361              pSynthesisEvents[i]->clear();          // process engine global events (these are currently only MIDI System Exclusive messages)
362          }          {
363                RTList<Event>::Iterator itEvent = pGlobalEvents->first();
364          // read and copy events from input queue              RTList<Event>::Iterator end     = pGlobalEvents->end();
365          Event event = pEventGenerator->CreateEvent();              for (; itEvent != end; ++itEvent) {
366          while (true) {                  switch (itEvent->Type) {
367              if (!pEventQueue->pop(&event)) break;                      case Event::type_sysex:
368              pEvents->alloc_assign(event);                          dmsg(5,("Engine: Sysex received\n"));
369                            ProcessSysex(itEvent);
370                            break;
371                    }
372                }
373          }          }
374    
375            // We only allow a maximum of CONFIG_MAX_VOICES voices to be stolen
376            // in each audio fragment. All subsequent request for spawning new
377            // voices in the same audio fragment will be ignored.
378            VoiceTheftsLeft = CONFIG_MAX_VOICES;
379    
380          // update time of start and end of this audio fragment (as events' time stamps relate to this)          // reset internal voice counter (just for statistic of active voices)
381          pEventGenerator->UpdateFragmentTime(Samples);          ActiveVoiceCountTemp = 0;
382    
383    
384          // process events          // handle events on all engine channels
385          Event* pNextEvent = pEvents->first();          for (int i = 0; i < engineChannels.size(); i++) {
386          while (pNextEvent) {              if (!engineChannels[i]->pInstrument) continue; // ignore if no instrument loaded
387              Event* pEvent = pNextEvent;              ProcessEvents(engineChannels[i], Samples);
             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;  
             }  
388          }          }
389    
390            // render all 'normal', active voices on all engine channels
391            for (int i = 0; i < engineChannels.size(); i++) {
392                if (!engineChannels[i]->pInstrument) continue; // ignore if no instrument loaded
393                RenderActiveVoices(engineChannels[i], Samples);
394            }
395    
396          // render audio from all active voices          // now that all ordinary voices on ALL engine channels are rendered, render new stolen voices
397          int active_voices = 0;          RenderStolenVoices(Samples);
         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();  
398    
399                  // now render current voice          // handle cleanup on all engine channels for the next audio fragment
400                  pVoice->Render(Samples);          for (int i = 0; i < engineChannels.size(); i++) {
401                  if (pVoice->IsActive()) active_voices++; // still active              if (!engineChannels[i]->pInstrument) continue; // ignore if no instrument loaded
402                  else { // voice reached end, is now inactive              PostProcess(engineChannels[i]);
                     KillVoice(pVoice); // remove voice from the list of active voices  
                 }  
             }  
             pKey->pEvents->clear(); // free all events on the key  
403          }          }
404    
405    
406          // write that to the disk thread class so that it can print it          // empty the engine's event list for the next audio fragment
407          // on the console for debugging purposes          ClearEventLists();
408          ActiveVoiceCount = active_voices;  
409            // reset voice stealing for the next audio fragment
410            pVoiceStealingQueue->clear();
411    
412            // just some statistics about this engine instance
413            ActiveVoiceCount = ActiveVoiceCountTemp;
414          if (ActiveVoiceCount > ActiveVoiceCountMax) ActiveVoiceCountMax = ActiveVoiceCount;          if (ActiveVoiceCount > ActiveVoiceCountMax) ActiveVoiceCountMax = ActiveVoiceCount;
415    
416            FrameTime += Samples;
417    
418          return 0;          return 0;
419      }      }
420    
421      /**      /**
422       *  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
423       *  voice for the given key.       * engine channel.
424       *       *
425       *  @param Key      - MIDI key number of the triggered key       * @param pEngineChannel - engine channel on which events should be
426       *  @param Velocity - MIDI velocity value of the triggered key       *                         processed
427         * @param Samples        - amount of sample points to be processed in
428         *                         this audio fragment cycle
429       */       */
430      void Engine::SendNoteOn(uint8_t Key, uint8_t Velocity) {      void Engine::ProcessEvents(EngineChannel* pEngineChannel, uint Samples) {
431          Event event    = pEventGenerator->CreateEvent();          // get all events from the engine channels's input event queue which belong to the current fragment
432          event.Type     = Event::type_note_on;          // (these are the common events like NoteOn, NoteOff, ControlChange, etc.)
433          event.Key      = Key;          pEngineChannel->ImportEvents(Samples);
434          event.Velocity = Velocity;  
435          if (this->pEventQueue->write_space() > 0) this->pEventQueue->push(&event);          // process events
436          else dmsg(1,("Engine: Input event queue full!"));          {
437                RTList<Event>::Iterator itEvent = pEngineChannel->pEvents->first();
438                RTList<Event>::Iterator end     = pEngineChannel->pEvents->end();
439                for (; itEvent != end; ++itEvent) {
440                    switch (itEvent->Type) {
441                        case Event::type_note_on:
442                            dmsg(5,("Engine: Note on received\n"));
443                            ProcessNoteOn((EngineChannel*)itEvent->pEngineChannel, itEvent);
444                            break;
445                        case Event::type_note_off:
446                            dmsg(5,("Engine: Note off received\n"));
447                            ProcessNoteOff((EngineChannel*)itEvent->pEngineChannel, itEvent);
448                            break;
449                        case Event::type_control_change:
450                            dmsg(5,("Engine: MIDI CC received\n"));
451                            ProcessControlChange((EngineChannel*)itEvent->pEngineChannel, itEvent);
452                            break;
453                        case Event::type_pitchbend:
454                            dmsg(5,("Engine: Pitchbend received\n"));
455                            ProcessPitchbend((EngineChannel*)itEvent->pEngineChannel, itEvent);
456                            break;
457                    }
458                }
459            }
460    
461            // reset voice stealing for the next engine channel (or next audio fragment)
462            itLastStolenVoice         = RTList<Voice>::Iterator();
463            itLastStolenVoiceGlobally = RTList<Voice>::Iterator();
464            iuiLastStolenKey          = RTList<uint>::Iterator();
465            iuiLastStolenKeyGlobally  = RTList<uint>::Iterator();
466            pLastStolenChannel        = NULL;
467      }      }
468    
469      /**      /**
470       *  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
471       *  voice(s) on the given key.       * this fragment) on the given engine channel.
472       *       *
473       *  @param Key      - MIDI key number of the released key       * @param pEngineChannel - engine channel on which audio should be
474       *  @param Velocity - MIDI release velocity value of the released key       *                         rendered
475         * @param Samples        - amount of sample points to be rendered in
476         *                         this audio fragment cycle
477       */       */
478      void Engine::SendNoteOff(uint8_t Key, uint8_t Velocity) {      void Engine::RenderActiveVoices(EngineChannel* pEngineChannel, uint Samples) {
479          Event event    = pEventGenerator->CreateEvent();          RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();
480          event.Type     = Event::type_note_off;          RTList<uint>::Iterator end    = pEngineChannel->pActiveKeys->end();
481          event.Key      = Key;          while (iuiKey != end) { // iterate through all active keys
482          event.Velocity = Velocity;              midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];
483          if (this->pEventQueue->write_space() > 0) this->pEventQueue->push(&event);              ++iuiKey;
484          else dmsg(1,("Engine: Input event queue full!"));  
485                RTList<Voice>::Iterator itVoice     = pKey->pActiveVoices->first();
486                RTList<Voice>::Iterator itVoicesEnd = pKey->pActiveVoices->end();
487                for (; itVoice != itVoicesEnd; ++itVoice) { // iterate through all voices on this key
488                    // now render current voice
489                    itVoice->Render(Samples);
490                    if (itVoice->IsActive()) ActiveVoiceCountTemp++; // still active
491                    else { // voice reached end, is now inactive
492                        FreeVoice(pEngineChannel, itVoice); // remove voice from the list of active voices
493                    }
494                }
495            }
496      }      }
497    
498      /**      /**
499       *  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
500       *  the pitch value for all voices.       * fragment) on the given engine channel. Stolen voices are rendered
501         * after all normal voices have been rendered; this is needed to render
502         * audio of those voices which were selected for voice stealing until
503         * the point were the stealing (that is the take over of the voice)
504         * actually happened.
505       *       *
506       *  @param Pitch - MIDI pitch value (-8192 ... +8191)       * @param pEngineChannel - engine channel on which audio should be
507         *                         rendered
508         * @param Samples        - amount of sample points to be rendered in
509         *                         this audio fragment cycle
510       */       */
511      void Engine::SendPitchbend(int Pitch) {      void Engine::RenderStolenVoices(uint Samples) {
512          Event event = pEventGenerator->CreateEvent();          RTList<Event>::Iterator itVoiceStealEvent = pVoiceStealingQueue->first();
513          event.Type  = Event::type_pitchbend;          RTList<Event>::Iterator end               = pVoiceStealingQueue->end();
514          event.Pitch = Pitch;          for (; itVoiceStealEvent != end; ++itVoiceStealEvent) {
515          if (this->pEventQueue->write_space() > 0) this->pEventQueue->push(&event);              EngineChannel* pEngineChannel = (EngineChannel*) itVoiceStealEvent->pEngineChannel;
516          else dmsg(1,("Engine: Input event queue full!"));              Pool<Voice>::Iterator itNewVoice =
517                    LaunchVoice(pEngineChannel, itVoiceStealEvent, itVoiceStealEvent->Param.Note.Layer, itVoiceStealEvent->Param.Note.ReleaseTrigger, false);
518                if (itNewVoice) {
519                    itNewVoice->Render(Samples);
520                    if (itNewVoice->IsActive()) ActiveVoiceCountTemp++; // still active
521                    else { // voice reached end, is now inactive
522                        FreeVoice(pEngineChannel, itNewVoice); // remove voice from the list of active voices
523                    }
524                }
525                else dmsg(1,("gig::Engine: ERROR, voice stealing didn't work out!\n"));
526    
527                // we need to clear the key's event list explicitly here in case key was never active
528                midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[itVoiceStealEvent->Param.Note.Key];
529                pKey->VoiceTheftsQueued--;
530                if (!pKey->Active && !pKey->VoiceTheftsQueued) pKey->pEvents->clear();
531            }
532      }      }
533    
534      /**      /**
535       *  Will be called by the MIDIIn Thread to signal the audio thread that a       * Free all keys which have turned inactive in this audio fragment, from
536       *  continuous controller value has changed.       * the list of active keys and clear all event lists on that engine
537         * channel.
538       *       *
539       *  @param Controller - MIDI controller number of the occured control change       * @param pEngineChannel - engine channel to cleanup
      *  @param Value      - value of the control change  
540       */       */
541      void Engine::SendControlChange(uint8_t Controller, uint8_t Value) {      void Engine::PostProcess(EngineChannel* pEngineChannel) {
542          Event event      = pEventGenerator->CreateEvent();          // free all keys which have no active voices left
543          event.Type       = Event::type_control_change;          {
544          event.Controller = Controller;              RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();
545          event.Value      = Value;              RTList<uint>::Iterator end    = pEngineChannel->pActiveKeys->end();
546          if (this->pEventQueue->write_space() > 0) this->pEventQueue->push(&event);              while (iuiKey != end) { // iterate through all active keys
547                    midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];
548                    ++iuiKey;
549                    if (pKey->pActiveVoices->isEmpty()) FreeKey(pEngineChannel, pKey);
550                    #if CONFIG_DEVMODE
551                    else { // just a sanity check for debugging
552                        RTList<Voice>::Iterator itVoice     = pKey->pActiveVoices->first();
553                        RTList<Voice>::Iterator itVoicesEnd = pKey->pActiveVoices->end();
554                        for (; itVoice != itVoicesEnd; ++itVoice) { // iterate through all voices on this key
555                            if (itVoice->itKillEvent) {
556                                dmsg(1,("gig::Engine: ERROR, killed voice survived !!!\n"));
557                            }
558                        }
559                    }
560                    #endif // CONFIG_DEVMODE
561                }
562            }
563    
564            // empty the engine channel's own event lists
565            pEngineChannel->ClearEventLists();
566        }
567    
568        /**
569         *  Will be called by the MIDI input device whenever a MIDI system
570         *  exclusive message has arrived.
571         *
572         *  @param pData - pointer to sysex data
573         *  @param Size  - lenght of sysex data (in bytes)
574         */
575        void Engine::SendSysex(void* pData, uint Size) {
576            Event event             = pEventGenerator->CreateEvent();
577            event.Type              = Event::type_sysex;
578            event.Param.Sysex.Size  = Size;
579            event.pEngineChannel    = NULL; // as Engine global event
580            if (pEventQueue->write_space() > 0) {
581                if (pSysexBuffer->write_space() >= Size) {
582                    // copy sysex data to input buffer
583                    uint toWrite = Size;
584                    uint8_t* pPos = (uint8_t*) pData;
585                    while (toWrite) {
586                        const uint writeNow = RTMath::Min(toWrite, pSysexBuffer->write_space_to_end());
587                        pSysexBuffer->write(pPos, writeNow);
588                        toWrite -= writeNow;
589                        pPos    += writeNow;
590    
591                    }
592                    // finally place sysex event into input event queue
593                    pEventQueue->push(&event);
594                }
595                else dmsg(1,("Engine: Sysex message too large (%d byte) for input buffer (%d byte)!",Size,CONFIG_SYSEX_BUFFER_SIZE));
596            }
597          else dmsg(1,("Engine: Input event queue full!"));          else dmsg(1,("Engine: Input event queue full!"));
598      }      }
599    
600      /**      /**
601       *  Assigns and triggers a new voice for the respective MIDI key.       *  Assigns and triggers a new voice for the respective MIDI key.
602       *       *
603       *  @param pNoteOnEvent - key, velocity and time stamp of the event       *  @param pEngineChannel - engine channel on which this event occured on
604         *  @param itNoteOnEvent - key, velocity and time stamp of the event
605       */       */
606      void Engine::ProcessNoteOn(Event* pNoteOnEvent) {      void Engine::ProcessNoteOn(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOnEvent) {
607          midi_key_info_t* pKey = &pMIDIKeyInfo[pNoteOnEvent->Key];  
608            const int key = itNoteOnEvent->Param.Note.Key;
609    
610            // Change key dimension value if key is in keyswitching area
611            {
612                const ::gig::Instrument* pInstrument = pEngineChannel->pInstrument;
613                if (key >= pInstrument->DimensionKeyRange.low && key <= pInstrument->DimensionKeyRange.high)
614                    pEngineChannel->CurrentKeyDimension = ((key - pInstrument->DimensionKeyRange.low) * 128) /
615                        (pInstrument->DimensionKeyRange.high - pInstrument->DimensionKeyRange.low + 1);
616            }
617    
618            midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[key];
619    
620          pKey->KeyPressed = true; // the MIDI key was now pressed down          pKey->KeyPressed = true; // the MIDI key was now pressed down
621            pKey->Velocity   = itNoteOnEvent->Param.Note.Velocity;
622            pKey->NoteOnTime = FrameTime + itNoteOnEvent->FragmentPos(); // will be used to calculate note length
623    
624          // cancel release process of voices on this key if needed          // cancel release process of voices on this key if needed
625          if (pKey->Active && !SustainPedal) {          if (pKey->Active && !pEngineChannel->SustainPedal) {
626              pNoteOnEvent->Type = Event::type_cancel_release; // transform event type              RTList<Event>::Iterator itCancelReleaseEvent = pKey->pEvents->allocAppend();
627              pEvents->move(pNoteOnEvent, pKey->pEvents); // move event to the key's own event list              if (itCancelReleaseEvent) {
628                    *itCancelReleaseEvent = *itNoteOnEvent;                  // copy event
629                    itCancelReleaseEvent->Type = Event::type_cancel_release; // transform event type
630                }
631                else dmsg(1,("Event pool emtpy!\n"));
632          }          }
633    
634          // allocate a new voice for the key          // move note on event to the key's own event list
635          Voice* pNewVoice = pKey->pActiveVoices->alloc();          RTList<Event>::Iterator itNoteOnEventOnKeyList = itNoteOnEvent.moveToEndOf(pKey->pEvents);
636          if (pNewVoice) {  
637              // launch the new voice          // allocate and trigger new voice(s) for the key
638              if (pNewVoice->Trigger(pNoteOnEvent, this->Pitch, this->pInstrument) < 0) {          {
639                  dmsg(1,("Triggering new voice failed!\n"));              // first, get total amount of required voices (dependant on amount of layers)
640                  pKey->pActiveVoices->free(pNewVoice);              ::gig::Region* pRegion = pEngineChannel->pInstrument->GetRegion(itNoteOnEventOnKeyList->Param.Note.Key);
641              }              if (pRegion) {
642              else if (!pKey->Active) { // mark as active key                  int voicesRequired = pRegion->Layers;
643                  pKey->Active = true;                  // now launch the required amount of voices
644                  pKey->pSelf  = pActiveKeys->alloc();                  for (int i = 0; i < voicesRequired; i++)
645                  *pKey->pSelf = pNoteOnEvent->Key;                      LaunchVoice(pEngineChannel, itNoteOnEventOnKeyList, i, false, true);
646              }              }
647          }          }
648          else std::cerr << "No free voice!" << std::endl << std::flush;  
649            // if neither a voice was spawned or postponed then remove note on event from key again
650            if (!pKey->Active && !pKey->VoiceTheftsQueued)
651                pKey->pEvents->free(itNoteOnEventOnKeyList);
652    
653            pKey->RoundRobinIndex++;
654      }      }
655    
656      /**      /**
# Line 515  namespace LinuxSampler { namespace gig { Line 659  namespace LinuxSampler { namespace gig {
659       *  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.
660       *  due to completion of sample playback).       *  due to completion of sample playback).
661       *       *
662       *  @param pNoteOffEvent - key, velocity and time stamp of the event       *  @param pEngineChannel - engine channel on which this event occured on
663         *  @param itNoteOffEvent - key, velocity and time stamp of the event
664       */       */
665      void Engine::ProcessNoteOff(Event* pNoteOffEvent) {      void Engine::ProcessNoteOff(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOffEvent) {
666          midi_key_info_t* pKey = &pMIDIKeyInfo[pNoteOffEvent->Key];          midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[itNoteOffEvent->Param.Note.Key];
667    
668          pKey->KeyPressed = false; // the MIDI key was now released          pKey->KeyPressed = false; // the MIDI key was now released
669    
670          // release voices on this key if needed          // release voices on this key if needed
671          if (pKey->Active && !SustainPedal) {          if (pKey->Active && !pEngineChannel->SustainPedal) {
672              pNoteOffEvent->Type = Event::type_release; // transform event type              itNoteOffEvent->Type = Event::type_release; // transform event type
673              pEvents->move(pNoteOffEvent, pKey->pEvents); // move event to the key's own event list  
674                // move event to the key's own event list
675                RTList<Event>::Iterator itNoteOffEventOnKeyList = itNoteOffEvent.moveToEndOf(pKey->pEvents);
676    
677                // spawn release triggered voice(s) if needed
678                if (pKey->ReleaseTrigger) {
679                    // first, get total amount of required voices (dependant on amount of layers)
680                    ::gig::Region* pRegion = pEngineChannel->pInstrument->GetRegion(itNoteOffEventOnKeyList->Param.Note.Key);
681                    if (pRegion) {
682                        int voicesRequired = pRegion->Layers;
683    
684                        // MIDI note-on velocity is used instead of note-off velocity
685                        itNoteOffEventOnKeyList->Param.Note.Velocity = pKey->Velocity;
686    
687                        // now launch the required amount of voices
688                        for (int i = 0; i < voicesRequired; i++)
689                            LaunchVoice(pEngineChannel, itNoteOffEventOnKeyList, i, true, false); //FIXME: for the moment we don't perform voice stealing for release triggered samples
690                    }
691                    pKey->ReleaseTrigger = false;
692                }
693    
694                // if neither a voice was spawned or postponed then remove note off event from key again
695                if (!pKey->Active && !pKey->VoiceTheftsQueued)
696                    pKey->pEvents->free(itNoteOffEventOnKeyList);
697          }          }
698      }      }
699    
# Line 533  namespace LinuxSampler { namespace gig { Line 701  namespace LinuxSampler { namespace gig {
701       *  Moves pitchbend event from the general (input) event list to the pitch       *  Moves pitchbend event from the general (input) event list to the pitch
702       *  event list.       *  event list.
703       *       *
704       *  @param pPitchbendEvent - absolute pitch value and time stamp of the event       *  @param pEngineChannel - engine channel on which this event occured on
705         *  @param itPitchbendEvent - absolute pitch value and time stamp of the event
706         */
707        void Engine::ProcessPitchbend(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itPitchbendEvent) {
708            pEngineChannel->Pitch = itPitchbendEvent->Param.Pitch.Pitch; // store current pitch value
709            itPitchbendEvent.moveToEndOf(pEngineChannel->pSynthesisEvents[Event::destination_vco]);
710        }
711    
712        /**
713         *  Allocates and triggers a new voice. This method will usually be
714         *  called by the ProcessNoteOn() method and by the voices itself
715         *  (e.g. to spawn further voices on the same key for layered sounds).
716         *
717         *  @param pEngineChannel      - engine channel on which this event occured on
718         *  @param itNoteOnEvent       - key, velocity and time stamp of the event
719         *  @param iLayer              - layer index for the new voice (optional - only
720         *                               in case of layered sounds of course)
721         *  @param ReleaseTriggerVoice - if new voice is a release triggered voice
722         *                               (optional, default = false)
723         *  @param VoiceStealing       - if voice stealing should be performed
724         *                               when there is no free voice
725         *                               (optional, default = true)
726         *  @returns pointer to new voice or NULL if there was no free voice or
727         *           if the voice wasn't triggered (for example when no region is
728         *           defined for the given key).
729         */
730        Pool<Voice>::Iterator Engine::LaunchVoice(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOnEvent, int iLayer, bool ReleaseTriggerVoice, bool VoiceStealing) {
731            midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[itNoteOnEvent->Param.Note.Key];
732    
733            // allocate a new voice for the key
734            Pool<Voice>::Iterator itNewVoice = pKey->pActiveVoices->allocAppend();
735            if (itNewVoice) {
736                // launch the new voice
737                if (itNewVoice->Trigger(pEngineChannel, itNoteOnEvent, pEngineChannel->Pitch, pEngineChannel->pInstrument, iLayer, ReleaseTriggerVoice, VoiceStealing) < 0) {
738                    dmsg(4,("Voice not triggered\n"));
739                    pKey->pActiveVoices->free(itNewVoice);
740                }
741                else { // on success
742                    uint** ppKeyGroup = NULL;
743                    if (itNewVoice->KeyGroup) { // if this voice / key belongs to a key group
744                        ppKeyGroup = &pEngineChannel->ActiveKeyGroups[itNewVoice->KeyGroup];
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) itVoiceToBeKilled->Kill(itNoteOnEvent);
752                            }
753                        }
754                    }
755                    if (!pKey->Active) { // mark as active key
756                        pKey->Active = true;
757                        pKey->itSelf = pEngineChannel->pActiveKeys->allocAppend();
758                        *pKey->itSelf = itNoteOnEvent->Param.Note.Key;
759                    }
760                    if (itNewVoice->KeyGroup) {
761                        *ppKeyGroup = &*pKey->itSelf; // put key as the (new) active key to its key group
762                    }
763                    if (itNewVoice->Type == Voice::type_release_trigger_required) pKey->ReleaseTrigger = true; // mark key for the need of release triggered voice(s)
764                    return itNewVoice; // success
765                }
766            }
767            else if (VoiceStealing) {
768                // try to steal one voice
769                int result = StealVoice(pEngineChannel, itNoteOnEvent);
770                if (!result) { // voice stolen successfully
771                    // put note-on event into voice-stealing queue, so it will be reprocessed after killed voice died
772                    RTList<Event>::Iterator itStealEvent = pVoiceStealingQueue->allocAppend();
773                    if (itStealEvent) {
774                        *itStealEvent = *itNoteOnEvent; // copy event
775                        itStealEvent->Param.Note.Layer = iLayer;
776                        itStealEvent->Param.Note.ReleaseTrigger = ReleaseTriggerVoice;
777                        pKey->VoiceTheftsQueued++;
778                    }
779                    else dmsg(1,("Voice stealing queue full!\n"));
780                }
781            }
782    
783            return Pool<Voice>::Iterator(); // no free voice or error
784        }
785    
786        /**
787         *  Will be called by LaunchVoice() method in case there are no free
788         *  voices left. This method will select and kill one old voice for
789         *  voice stealing and postpone the note-on event until the selected
790         *  voice actually died.
791         *
792         *  @param pEngineChannel - engine channel on which this event occured on
793         *  @param itNoteOnEvent - key, velocity and time stamp of the event
794         *  @returns 0 on success, a value < 0 if no active voice could be picked for voice stealing
795       */       */
796      void Engine::ProcessPitchbend(Event* pPitchbendEvent) {      int Engine::StealVoice(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOnEvent) {
797          this->Pitch = pPitchbendEvent->Pitch; // store current pitch value          if (!VoiceTheftsLeft) {
798          pEvents->move(pPitchbendEvent, pSynthesisEvents[Event::destination_vco]);              dmsg(1,("Max. voice thefts per audio fragment reached (you may raise CONFIG_MAX_VOICES).\n"));
799                return -1;
800            }
801            if (!pEventPool->poolIsEmpty()) {
802    
803                RTList<Voice>::Iterator itSelectedVoice;
804    
805                // Select one voice for voice stealing
806                switch (CONFIG_VOICE_STEAL_ALGO) {
807    
808                    // try to pick the oldest voice on the key where the new
809                    // voice should be spawned, if there is no voice on that
810                    // key, or no voice left to kill, then procceed with
811                    // 'oldestkey' algorithm
812                    case voice_steal_algo_oldestvoiceonkey: {
813                        midi_key_info_t* pSelectedKey = &pEngineChannel->pMIDIKeyInfo[itNoteOnEvent->Param.Note.Key];
814                        itSelectedVoice = pSelectedKey->pActiveVoices->first();
815                        // proceed iterating if voice was created in this fragment cycle
816                        while (itSelectedVoice && !itSelectedVoice->hasRendered()) ++itSelectedVoice;
817                        // if we haven't found a voice then proceed with algorithm 'oldestkey'
818                        if (itSelectedVoice && itSelectedVoice->hasRendered()) break;
819                    } // no break - intentional !
820    
821                    // try to pick the oldest voice on the oldest active key
822                    // from the same engine channel
823                    // (caution: must stay after 'oldestvoiceonkey' algorithm !)
824                    case voice_steal_algo_oldestkey: {
825                        // if we already stole in this fragment, try to proceed on same key
826                        if (this->itLastStolenVoice) {
827                            itSelectedVoice = this->itLastStolenVoice;
828                            do {
829                                ++itSelectedVoice;
830                            } while (itSelectedVoice && !itSelectedVoice->hasRendered()); // proceed iterating if voice was created in this fragment cycle
831                            // found a "stealable" voice ?
832                            if (itSelectedVoice && itSelectedVoice->hasRendered()) {
833                                // remember which voice we stole, so we can simply proceed on next voice stealing
834                                this->itLastStolenVoice = itSelectedVoice;
835                                break; // selection succeeded
836                            }
837                        }
838                        // get (next) oldest key
839                        RTList<uint>::Iterator iuiSelectedKey = (this->iuiLastStolenKey) ? ++this->iuiLastStolenKey : pEngineChannel->pActiveKeys->first();
840                        while (iuiSelectedKey) {
841                            midi_key_info_t* pSelectedKey = &pEngineChannel->pMIDIKeyInfo[*iuiSelectedKey];
842                            itSelectedVoice = pSelectedKey->pActiveVoices->first();                        
843                            // proceed iterating if voice was created in this fragment cycle
844                            while (itSelectedVoice && !itSelectedVoice->hasRendered()) ++itSelectedVoice;
845                            // found a "stealable" voice ?
846                            if (itSelectedVoice && itSelectedVoice->hasRendered()) {
847                                // remember which voice on which key we stole, so we can simply proceed on next voice stealing
848                                this->iuiLastStolenKey  = iuiSelectedKey;
849                                this->itLastStolenVoice = itSelectedVoice;
850                                break; // selection succeeded
851                            }
852                            ++iuiSelectedKey; // get next oldest key
853                        }
854                        break;
855                    }
856    
857                    // don't steal anything
858                    case voice_steal_algo_none:
859                    default: {
860                        dmsg(1,("No free voice (voice stealing disabled)!\n"));
861                        return -1;
862                    }
863                }
864    
865                // if we couldn't steal a voice from the same engine channel then
866                // steal oldest voice on the oldest key from any other engine channel
867                // (the smaller engine channel number, the higher priority)
868                if (!itSelectedVoice || !itSelectedVoice->hasRendered()) {
869                    EngineChannel* pSelectedChannel;
870                    int            iChannelIndex;
871                    // select engine channel
872                    if (pLastStolenChannel) {
873                        pSelectedChannel = pLastStolenChannel;
874                        iChannelIndex    = pSelectedChannel->iEngineIndexSelf;
875                    } else { // pick the engine channel followed by this engine channel
876                        iChannelIndex    = (pEngineChannel->iEngineIndexSelf + 1) % engineChannels.size();
877                        pSelectedChannel = engineChannels[iChannelIndex];
878                    }
879                    // iterate through engine channels
880                    while (true) {
881                        // if we already stole in this fragment, try to proceed on same key
882                        if (this->itLastStolenVoiceGlobally) {
883                            itSelectedVoice = this->itLastStolenVoiceGlobally;
884                            do {
885                                ++itSelectedVoice;
886                            } while (itSelectedVoice && !itSelectedVoice->hasRendered()); // proceed iterating if voice was created in this fragment cycle
887                            // break if selection succeeded
888                            if (itSelectedVoice && itSelectedVoice->hasRendered()) {
889                                // remember which voice we stole, so we can simply proceed on next voice stealing
890                                this->itLastStolenVoiceGlobally = itSelectedVoice;
891                                break; // selection succeeded
892                            }
893                        }
894                        // get (next) oldest key
895                        RTList<uint>::Iterator iuiSelectedKey = (this->iuiLastStolenKey) ? ++this->iuiLastStolenKey : pSelectedChannel->pActiveKeys->first();
896                        while (iuiSelectedKey) {
897                            midi_key_info_t* pSelectedKey = &pEngineChannel->pMIDIKeyInfo[*iuiSelectedKey];
898                            itSelectedVoice = pSelectedKey->pActiveVoices->first();
899                            // proceed iterating if voice was created in this fragment cycle
900                            while (itSelectedVoice && !itSelectedVoice->hasRendered()) ++itSelectedVoice;
901                            // found a "stealable" voice ?
902                            if (itSelectedVoice && itSelectedVoice->hasRendered()) {
903                                // remember which voice on which key on which engine channel we stole, so we can simply proceed on next voice stealing
904                                this->iuiLastStolenKeyGlobally  = iuiSelectedKey;
905                                this->itLastStolenVoiceGlobally = itSelectedVoice;
906                                this->pLastStolenChannel        = pSelectedChannel;
907                                break; // selection succeeded
908                            }
909                            ++iuiSelectedKey; // get next key on current engine channel
910                        }
911                        // get next engine channel
912                        iChannelIndex    = (iChannelIndex + 1) % engineChannels.size();
913                        pSelectedChannel = engineChannels[iChannelIndex];
914                    }
915                }
916    
917                #if CONFIG_DEVMODE
918                if (!itSelectedVoice->IsActive()) {
919                    dmsg(1,("gig::Engine: ERROR, tried to steal a voice which was not active !!!\n"));
920                    return -1;
921                }
922                #endif // CONFIG_DEVMODE
923    
924                // now kill the selected voice
925                itSelectedVoice->Kill(itNoteOnEvent);            
926    
927                --VoiceTheftsLeft;
928    
929                return 0; // success
930            }
931            else {
932                dmsg(1,("Event pool emtpy!\n"));
933                return -1;
934            }
935      }      }
936    
937      /**      /**
938       *  Immediately kills the voice given with pVoice (no matter if sustain is       *  Removes the given voice from the MIDI key's list of active voices.
939       *  pressed or not) and removes it from the MIDI key's list of active voice.       *  This method will be called when a voice went inactive, e.g. because
940       *  This method will e.g. be called if a voice went inactive by itself.       *  it finished to playback its sample, finished its release stage or
941         *  just was killed.
942       *       *
943       *  @param pVoice - points to the voice to be killed       *  @param pEngineChannel - engine channel on which this event occured on
944         *  @param itVoice - points to the voice to be freed
945       */       */
946      void Engine::KillVoice(Voice* pVoice) {      void Engine::FreeVoice(EngineChannel* pEngineChannel, Pool<Voice>::Iterator& itVoice) {
947          if (pVoice) {          if (itVoice) {
948              if (pVoice->IsActive()) pVoice->Kill();              midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[itVoice->MIDIKey];
949    
950              midi_key_info_t* pKey = &pMIDIKeyInfo[pVoice->MIDIKey];              uint keygroup = itVoice->KeyGroup;
951    
952              // free the voice object              // free the voice object
953              pVoicePool->free(pVoice);              pVoicePool->free(itVoice);
954    
955              // 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
956              if (pKey->pActiveVoices->is_empty()) {              if (pKey->pActiveVoices->isEmpty() && keygroup) {
957                  pKey->Active = false;                  uint** ppKeyGroup = &pEngineChannel->ActiveKeyGroups[keygroup];
958                  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"));  
959              }              }
960          }          }
961          else std::cerr << "Couldn't release voice! (pVoice == NULL)\n" << std::flush;          else std::cerr << "Couldn't release voice! (!itVoice)\n" << std::flush;
962        }
963    
964        /**
965         *  Called when there's no more voice left on a key, this call will
966         *  update the key info respectively.
967         *
968         *  @param pEngineChannel - engine channel on which this event occured on
969         *  @param pKey - key which is now inactive
970         */
971        void Engine::FreeKey(EngineChannel* pEngineChannel, midi_key_info_t* pKey) {
972            if (pKey->pActiveVoices->isEmpty()) {
973                pKey->Active = false;
974                pEngineChannel->pActiveKeys->free(pKey->itSelf); // remove key from list of active keys
975                pKey->itSelf = RTList<uint>::Iterator();
976                pKey->ReleaseTrigger = false;
977                pKey->pEvents->clear();
978                dmsg(3,("Key has no more voices now\n"));
979            }
980            else dmsg(1,("gig::Engine: Oops, tried to free a key which contains voices.\n"));
981      }      }
982    
983      /**      /**
984       *  Reacts on supported control change commands (e.g. pitch bend wheel,       *  Reacts on supported control change commands (e.g. pitch bend wheel,
985       *  modulation wheel, aftertouch).       *  modulation wheel, aftertouch).
986       *       *
987       *  @param pControlChangeEvent - controller, value and time stamp of the event       *  @param pEngineChannel - engine channel on which this event occured on
988         *  @param itControlChangeEvent - controller, value and time stamp of the event
989       */       */
990      void Engine::ProcessControlChange(Event* pControlChangeEvent) {      void Engine::ProcessControlChange(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itControlChangeEvent) {
991          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));
992    
993            // update controller value in the engine channel's controller table
994            pEngineChannel->ControllerTable[itControlChangeEvent->Param.CC.Controller] = itControlChangeEvent->Param.CC.Value;
995    
996          switch (pControlChangeEvent->Controller) {          // move event from the unsorted event list to the control change event list
997              case 64: {          Pool<Event>::Iterator itControlChangeEventOnCCList = itControlChangeEvent.moveToEndOf(pEngineChannel->pCCEvents);
998                  if (pControlChangeEvent->Value >= 64 && !SustainPedal) {  
999            switch (itControlChangeEventOnCCList->Param.CC.Controller) {
1000                case 7: { // volume
1001                    //TODO: not sample accurate yet
1002                    pEngineChannel->GlobalVolume = (float) itControlChangeEventOnCCList->Param.CC.Value / 127.0f;
1003                    break;
1004                }
1005                case 10: { // panpot
1006                    //TODO: not sample accurate yet
1007                    const int pan = (int) itControlChangeEventOnCCList->Param.CC.Value - 64;
1008                    pEngineChannel->GlobalPanLeft  = 1.0f - float(RTMath::Max(pan, 0)) /  63.0f;
1009                    pEngineChannel->GlobalPanRight = 1.0f - float(RTMath::Min(pan, 0)) / -64.0f;
1010                    break;
1011                }
1012                case 64: { // sustain
1013                    if (itControlChangeEventOnCCList->Param.CC.Value >= 64 && !pEngineChannel->SustainPedal) {
1014                      dmsg(4,("PEDAL DOWN\n"));                      dmsg(4,("PEDAL DOWN\n"));
1015                      SustainPedal = true;                      pEngineChannel->SustainPedal = true;
1016    
1017                      // cancel release process of voices if necessary                      // cancel release process of voices if necessary
1018                      uint* piKey = pActiveKeys->first();                      RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();
1019                      if (piKey) {                      for (; iuiKey; ++iuiKey) {
1020                          pControlChangeEvent->Type = Event::type_cancel_release; // transform event type                          midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];
1021                          while (piKey) {                          if (!pKey->KeyPressed) {
1022                              midi_key_info_t* pKey = &pMIDIKeyInfo[*piKey];                              RTList<Event>::Iterator itNewEvent = pKey->pEvents->allocAppend();
1023                              pActiveKeys->set_current(piKey);                              if (itNewEvent) {
1024                              piKey = pActiveKeys->next();                                  *itNewEvent = *itControlChangeEventOnCCList; // copy event to the key's own event list
1025                              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"));  
1026                              }                              }
1027                                else dmsg(1,("Event pool emtpy!\n"));
1028                          }                          }
1029                      }                      }
1030                  }                  }
1031                  if (pControlChangeEvent->Value < 64 && SustainPedal) {                  if (itControlChangeEventOnCCList->Param.CC.Value < 64 && pEngineChannel->SustainPedal) {
1032                      dmsg(4,("PEDAL UP\n"));                      dmsg(4,("PEDAL UP\n"));
1033                      SustainPedal = false;                      pEngineChannel->SustainPedal = false;
1034    
1035                      // release voices if their respective key is not pressed                      // release voices if their respective key is not pressed
1036                      uint* piKey = pActiveKeys->first();                      RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();
1037                      if (piKey) {                      for (; iuiKey; ++iuiKey) {
1038                          pControlChangeEvent->Type = Event::type_release; // transform event type                          midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];
1039                          while (piKey) {                          if (!pKey->KeyPressed) {
1040                              midi_key_info_t* pKey = &pMIDIKeyInfo[*piKey];                              RTList<Event>::Iterator itNewEvent = pKey->pEvents->allocAppend();
1041                              pActiveKeys->set_current(piKey);                              if (itNewEvent) {
1042                              piKey = pActiveKeys->next();                                  *itNewEvent = *itControlChangeEventOnCCList; // copy event to the key's own event list
1043                              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"));  
1044                              }                              }
1045                                else dmsg(1,("Event pool emtpy!\n"));
1046                          }                          }
1047                      }                      }
1048                  }                  }
1049                  break;                  break;
1050              }              }
1051    
1052    
1053                // Channel Mode Messages
1054    
1055                case 120: { // all sound off
1056                    KillAllVoices(pEngineChannel, itControlChangeEventOnCCList);
1057                    break;
1058                }
1059                case 121: { // reset all controllers
1060                    pEngineChannel->ResetControllers();
1061                    break;
1062                }
1063                case 123: { // all notes off
1064                    ReleaseAllVoices(pEngineChannel, itControlChangeEventOnCCList);
1065                    break;
1066                }
1067          }          }
1068        }
1069    
1070          // update controller value in the engine's controller table      /**
1071          ControllerTable[pControlChangeEvent->Controller] = pControlChangeEvent->Value;       *  Reacts on MIDI system exclusive messages.
1072         *
1073         *  @param itSysexEvent - sysex data size and time stamp of the sysex event
1074         */
1075        void Engine::ProcessSysex(Pool<Event>::Iterator& itSysexEvent) {
1076            RingBuffer<uint8_t>::NonVolatileReader reader = pSysexBuffer->get_non_volatile_reader();
1077    
1078          // move event from the unsorted event list to the control change event list          uint8_t exclusive_status, id;
1079          pEvents->move(pControlChangeEvent, pCCEvents);          if (!reader.pop(&exclusive_status)) goto free_sysex_data;
1080            if (!reader.pop(&id))               goto free_sysex_data;
1081            if (exclusive_status != 0xF0)       goto free_sysex_data;
1082    
1083            switch (id) {
1084                case 0x41: { // Roland
1085                    dmsg(3,("Roland Sysex\n"));
1086                    uint8_t device_id, model_id, cmd_id;
1087                    if (!reader.pop(&device_id)) goto free_sysex_data;
1088                    if (!reader.pop(&model_id))  goto free_sysex_data;
1089                    if (!reader.pop(&cmd_id))    goto free_sysex_data;
1090                    if (model_id != 0x42 /*GS*/) goto free_sysex_data;
1091                    if (cmd_id != 0x12 /*DT1*/)  goto free_sysex_data;
1092    
1093                    // command address
1094                    uint8_t addr[3]; // 2 byte addr MSB, followed by 1 byte addr LSB)
1095                    const RingBuffer<uint8_t>::NonVolatileReader checksum_reader = reader; // so we can calculate the check sum later
1096                    if (reader.read(&addr[0], 3) != 3) goto free_sysex_data;
1097                    if (addr[0] == 0x40 && addr[1] == 0x00) { // System Parameters
1098                        dmsg(3,("\tSystem Parameter\n"));
1099                    }
1100                    else if (addr[0] == 0x40 && addr[1] == 0x01) { // Common Parameters
1101                        dmsg(3,("\tCommon Parameter\n"));
1102                    }
1103                    else if (addr[0] == 0x40 && (addr[1] & 0xf0) == 0x10) { // Part Parameters (1)
1104                        dmsg(3,("\tPart Parameter\n"));
1105                        switch (addr[2]) {
1106                            case 0x40: { // scale tuning
1107                                dmsg(3,("\t\tScale Tuning\n"));
1108                                uint8_t scale_tunes[12]; // detuning of all 12 semitones of an octave
1109                                if (reader.read(&scale_tunes[0], 12) != 12) goto free_sysex_data;
1110                                uint8_t checksum;
1111                                if (!reader.pop(&checksum)) goto free_sysex_data;
1112                                #if CONFIG_ASSERT_GS_SYSEX_CHECKSUM
1113                                if (GSCheckSum(checksum_reader, 12)) goto free_sysex_data;
1114                                #endif // CONFIG_ASSERT_GS_SYSEX_CHECKSUM
1115                                for (int i = 0; i < 12; i++) scale_tunes[i] -= 64;
1116                                AdjustScale((int8_t*) scale_tunes);
1117                                dmsg(3,("\t\t\tNew scale applied.\n"));
1118                                break;
1119                            }
1120                        }
1121                    }
1122                    else if (addr[0] == 0x40 && (addr[1] & 0xf0) == 0x20) { // Part Parameters (2)
1123                    }
1124                    else if (addr[0] == 0x41) { // Drum Setup Parameters
1125                    }
1126                    break;
1127                }
1128            }
1129    
1130            free_sysex_data: // finally free sysex data
1131            pSysexBuffer->increment_read_ptr(itSysexEvent->Param.Sysex.Size);
1132      }      }
1133    
1134      /**      /**
1135       * Initialize the parameter sequence for the modulation destination given by       * Calculates the Roland GS sysex check sum.
1136       * by 'dst' with the constant value given by val.       *
1137         * @param AddrReader - reader which currently points to the first GS
1138         *                     command address byte of the GS sysex message in
1139         *                     question
1140         * @param DataSize   - size of the GS message data (in bytes)
1141       */       */
1142      void Engine::ResetSynthesisParameters(Event::destination_t dst, float val) {      uint8_t Engine::GSCheckSum(const RingBuffer<uint8_t>::NonVolatileReader AddrReader, uint DataSize) {
1143          int maxsamples = pAudioOutputDevice->MaxSamplesPerCycle();          RingBuffer<uint8_t>::NonVolatileReader reader = AddrReader;
1144          for (int i = 0; i < maxsamples; i++) pSynthesisParameters[dst][i] = val;          uint bytes = 3 /*addr*/ + DataSize;
1145            uint8_t addr_and_data[bytes];
1146            reader.read(&addr_and_data[0], bytes);
1147            uint8_t sum = 0;
1148            for (uint i = 0; i < bytes; i++) sum += addr_and_data[i];
1149            return 128 - sum % 128;
1150      }      }
1151    
1152      float Engine::Volume() {      /**
1153          return GlobalVolume;       * Allows to tune each of the twelve semitones of an octave.
1154         *
1155         * @param ScaleTunes - detuning of all twelve semitones (in cents)
1156         */
1157        void Engine::AdjustScale(int8_t ScaleTunes[12]) {
1158            memcpy(&this->ScaleTuning[0], &ScaleTunes[0], 12); //TODO: currently not sample accurate
1159      }      }
1160    
1161      void Engine::Volume(float f) {      /**
1162          GlobalVolume = f;       * Releases all voices on an engine channel. All voices will go into
1163         * the release stage and thus it might take some time (e.g. dependant to
1164         * their envelope release time) until they actually die.
1165         *
1166         * @param pEngineChannel - engine channel on which all voices should be released
1167         * @param itReleaseEvent - event which caused this releasing of all voices
1168         */
1169        void Engine::ReleaseAllVoices(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itReleaseEvent) {
1170            RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();
1171            while (iuiKey) {
1172                midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];
1173                ++iuiKey;
1174                // append a 'release' event to the key's own event list
1175                RTList<Event>::Iterator itNewEvent = pKey->pEvents->allocAppend();
1176                if (itNewEvent) {
1177                    *itNewEvent = *itReleaseEvent; // copy original event (to the key's event list)
1178                    itNewEvent->Type = Event::type_release; // transform event type
1179                }
1180                else dmsg(1,("Event pool emtpy!\n"));
1181            }
1182        }
1183    
1184        /**
1185         * Kills all voices on an engine channel as soon as possible. Voices
1186         * won't get into release state, their volume level will be ramped down
1187         * as fast as possible.
1188         *
1189         * @param pEngineChannel - engine channel on which all voices should be killed
1190         * @param itKillEvent    - event which caused this killing of all voices
1191         */
1192        void Engine::KillAllVoices(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itKillEvent) {
1193            RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();
1194            RTList<uint>::Iterator end    = pEngineChannel->pActiveKeys->end();
1195            while (iuiKey != end) { // iterate through all active keys
1196                midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];
1197                ++iuiKey;
1198                RTList<Voice>::Iterator itVoice     = pKey->pActiveVoices->first();
1199                RTList<Voice>::Iterator itVoicesEnd = pKey->pActiveVoices->end();
1200                for (; itVoice != itVoicesEnd; ++itVoice) { // iterate through all voices on this key
1201                    itVoice->Kill(itKillEvent);
1202                }
1203            }
1204        }
1205    
1206        /**
1207         * Initialize the parameter sequence for the modulation destination given by
1208         * by 'dst' with the constant value given by val.
1209         */
1210        void Engine::ResetSynthesisParameters(Event::destination_t dst, float val) {
1211            int maxsamples = pAudioOutputDevice->MaxSamplesPerCycle();
1212            float* m = &pSynthesisParameters[dst][0];
1213            for (int i = 0; i < maxsamples; i += 4) {
1214               m[i]   = val;
1215               m[i+1] = val;
1216               m[i+2] = val;
1217               m[i+3] = val;
1218            }
1219      }      }
1220    
1221      uint Engine::VoiceCount() {      uint Engine::VoiceCount() {
# Line 674  namespace LinuxSampler { namespace gig { Line 1246  namespace LinuxSampler { namespace gig {
1246          return pDiskThread->GetBufferFillPercentage();          return pDiskThread->GetBufferFillPercentage();
1247      }      }
1248    
1249        String Engine::EngineName() {
1250            return LS_GIG_ENGINE_NAME;
1251        }
1252    
1253      String Engine::Description() {      String Engine::Description() {
1254          return "Gigasampler Engine";          return "Gigasampler Engine";
1255      }      }
1256    
1257      String Engine::Version() {      String Engine::Version() {
1258          return "0.0.1-0cvs20040423";          String s = "$Revision: 1.41 $";
1259            return s.substr(11, s.size() - 13); // cut dollar signs, spaces and CVS macro keyword
1260      }      }
1261    
1262  }} // namespace LinuxSampler::gig  }} // namespace LinuxSampler::gig
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