/[svn]/linuxsampler/trunk/src/engines/gig/Engine.cpp
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revision 80 by schoenebeck, Sun May 23 19:16:33 2004 UTC revision 663 by schoenebeck, Sat Jun 18 21:37:03 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    #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    
# Line 63  namespace LinuxSampler { namespace gig { Line 119  namespace LinuxSampler { namespace gig {
119          pMainFilterParameters   = NULL;          pMainFilterParameters   = NULL;
120    
121          ResetInternal();          ResetInternal();
122            ResetScaleTuning();
123      }      }
124    
125        /**
126         * Destructor
127         */
128      Engine::~Engine() {      Engine::~Engine() {
129          if (pDiskThread) {          if (pDiskThread) {
130                dmsg(1,("Stopping disk thread..."));
131              pDiskThread->StopThread();              pDiskThread->StopThread();
132              delete pDiskThread;              delete pDiskThread;
133                dmsg(1,("OK\n"));
134          }          }
         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;  
135          if (pEventQueue) delete pEventQueue;          if (pEventQueue) delete pEventQueue;
136          if (pEventPool)  delete pEventPool;          if (pEventPool)  delete pEventPool;
137          if (pVoicePool)  delete pVoicePool;          if (pVoicePool) {
138          if (pActiveKeys) delete pActiveKeys;              pVoicePool->clear();
139                delete pVoicePool;
140            }
141          if (pEventGenerator) delete pEventGenerator;          if (pEventGenerator) delete pEventGenerator;
142          if (pMainFilterParameters) delete[] pMainFilterParameters;          if (pMainFilterParameters) delete[] pMainFilterParameters;
143          if (pBasicFilterParameters) delete[] pBasicFilterParameters;          if (pBasicFilterParameters) delete[] pBasicFilterParameters;
144          if (pSynthesisParameters[0]) delete[] pSynthesisParameters[0];          if (pSynthesisParameters[0]) free(pSynthesisParameters[0]);
145            if (pVoiceStealingQueue) delete pVoiceStealingQueue;
146            if (pSysexBuffer) delete pSysexBuffer;
147            EngineFactory::Destroy(this);
148      }      }
149    
150      void Engine::Enable() {      void Engine::Enable() {
# Line 116  namespace LinuxSampler { namespace gig { Line 171  namespace LinuxSampler { namespace gig {
171       */       */
172      void Engine::Reset() {      void Engine::Reset() {
173          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();  
   
174          ResetInternal();          ResetInternal();
175            ResetScaleTuning();
         // signal audio thread to continue with rendering  
         //SuspensionRequested = false;  
176          Enable();          Enable();
177      }      }
178    
# Line 142  namespace LinuxSampler { namespace gig { Line 181  namespace LinuxSampler { namespace gig {
181       *  control and status variables. This method is not thread safe!       *  control and status variables. This method is not thread safe!
182       */       */
183      void Engine::ResetInternal() {      void Engine::ResetInternal() {
         Pitch               = 0;  
         SustainPedal        = false;  
184          ActiveVoiceCount    = 0;          ActiveVoiceCount    = 0;
185          ActiveVoiceCountMax = 0;          ActiveVoiceCountMax = 0;
186    
187          // set all MIDI controller values to zero          // reset voice stealing parameters
188          memset(ControllerTable, 0x00, 128);          pVoiceStealingQueue->clear();
189            itLastStolenVoice          = RTList<Voice>::Iterator();
190          // reset key info          itLastStolenVoiceGlobally  = RTList<Voice>::Iterator();
191          for (uint i = 0; i < 128; i++) {          iuiLastStolenKey           = RTList<uint>::Iterator();
192              pMIDIKeyInfo[i].pActiveVoices->clear();          iuiLastStolenKeyGlobally   = RTList<uint>::Iterator();
193              pMIDIKeyInfo[i].pEvents->clear();          pLastStolenChannel         = NULL;
             pMIDIKeyInfo[i].KeyPressed = false;  
             pMIDIKeyInfo[i].Active     = false;  
             pMIDIKeyInfo[i].pSelf      = NULL;  
         }  
194    
195          // reset all voices          // reset all voices
196          for (Voice* pVoice = pVoicePool->alloc(); pVoice; pVoice = pVoicePool->alloc()) {          for (RTList<Voice>::Iterator iterVoice = pVoicePool->allocAppend(); iterVoice == pVoicePool->last(); iterVoice = pVoicePool->allocAppend()) {
197              pVoice->Reset();              iterVoice->Reset();
198          }          }
199          pVoicePool->clear();          pVoicePool->clear();
200    
         // free all active keys  
         pActiveKeys->clear();  
   
201          // reset disk thread          // reset disk thread
202          if (pDiskThread) pDiskThread->Reset();          if (pDiskThread) pDiskThread->Reset();
203    
# Line 176  namespace LinuxSampler { namespace gig { Line 206  namespace LinuxSampler { namespace gig {
206      }      }
207    
208      /**      /**
209       *  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.  
210       */       */
211      void Engine::ResourceToBeUpdated(::gig::Instrument* pResource, void*& pUpdateArg) {      void Engine::ResetScaleTuning() {
212          dmsg(3,("gig::Engine: Received instrument update message.\n"));          memset(&ScaleTuning[0], 0x00, 12);
         DisableAndLock();  
         ResetInternal();  
         this->pInstrument = NULL;  
213      }      }
214    
215      /**      /**
216       * Will be called by the InstrumentResourceManager when the instrument       * Connect this engine instance with the given audio output device.
217       * update process was completed, so we can continue with playback.       * This method will be called when an Engine instance is created.
218         * All of the engine's data structures which are dependant to the used
219         * audio output device / driver will be (re)allocated and / or
220         * adjusted appropriately.
221         *
222         * @param pAudioOut - audio output device to connect to
223       */       */
     void Engine::ResourceUpdated(::gig::Instrument* pOldResource, ::gig::Instrument* pNewResource, void* pUpdateArg) {  
         this->pInstrument = pNewResource;  
         Enable();  
     }  
   
224      void Engine::Connect(AudioOutputDevice* pAudioOut) {      void Engine::Connect(AudioOutputDevice* pAudioOut) {
225          pAudioOutputDevice = pAudioOut;          pAudioOutputDevice = pAudioOut;
226    
# Line 265  namespace LinuxSampler { namespace gig { Line 235  namespace LinuxSampler { namespace gig {
235              throw LinuxSamplerException(msg);              throw LinuxSamplerException(msg);
236          }          }
237    
238            this->MaxSamplesPerCycle = pAudioOutputDevice->MaxSamplesPerCycle();
239            this->SampleRate         = pAudioOutputDevice->SampleRate();
240    
241            // FIXME: audio drivers with varying fragment sizes might be a problem here
242            MaxFadeOutPos = MaxSamplesPerCycle - int(double(SampleRate) * CONFIG_EG_MIN_RELEASE_TIME) - 1;
243            if (MaxFadeOutPos < 0)
244                throw LinuxSamplerException("CONFIG_EG_MIN_RELEASE_TIME too big for current audio fragment size / sampling rate!");
245    
246          // (re)create disk thread          // (re)create disk thread
247          if (this->pDiskThread) {          if (this->pDiskThread) {
248                dmsg(1,("Stopping disk thread..."));
249              this->pDiskThread->StopThread();              this->pDiskThread->StopThread();
250              delete this->pDiskThread;              delete this->pDiskThread;
251                dmsg(1,("OK\n"));
252          }          }
253          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
254          if (!pDiskThread) {          if (!pDiskThread) {
255              dmsg(0,("gig::Engine  new diskthread = NULL\n"));              dmsg(0,("gig::Engine  new diskthread = NULL\n"));
256              exit(EXIT_FAILURE);              exit(EXIT_FAILURE);
257          }          }
258    
259          for (Voice* pVoice = pVoicePool->alloc(); pVoice; pVoice = pVoicePool->alloc()) {          for (RTList<Voice>::Iterator iterVoice = pVoicePool->allocAppend(); iterVoice == pVoicePool->last(); iterVoice = pVoicePool->allocAppend()) {
260              pVoice->pDiskThread = this->pDiskThread;              iterVoice->pDiskThread = this->pDiskThread;
             pVoice->SetOutput(pAudioOut);  
261              dmsg(3,("d"));              dmsg(3,("d"));
262          }          }
263          pVoicePool->clear();          pVoicePool->clear();
# Line 288  namespace LinuxSampler { namespace gig { Line 267  namespace LinuxSampler { namespace gig {
267          pEventGenerator = new EventGenerator(pAudioOut->SampleRate());          pEventGenerator = new EventGenerator(pAudioOut->SampleRate());
268    
269          // (re)allocate synthesis parameter matrix          // (re)allocate synthesis parameter matrix
270          if (pSynthesisParameters[0]) delete[] pSynthesisParameters[0];          if (pSynthesisParameters[0]) free(pSynthesisParameters[0]);
271          pSynthesisParameters[0] = new float[Event::destination_count * pAudioOut->MaxSamplesPerCycle()];  
272            #if defined(__APPLE__)
273            pSynthesisParameters[0] = (float *) malloc(Event::destination_count * sizeof(float) * pAudioOut->MaxSamplesPerCycle());
274            #else
275            pSynthesisParameters[0] = (float *) memalign(16,(Event::destination_count * sizeof(float) * pAudioOut->MaxSamplesPerCycle()));
276            #endif
277          for (int dst = 1; dst < Event::destination_count; dst++)          for (int dst = 1; dst < Event::destination_count; dst++)
278              pSynthesisParameters[dst] = pSynthesisParameters[dst - 1] + pAudioOut->MaxSamplesPerCycle();              pSynthesisParameters[dst] = pSynthesisParameters[dst - 1] + pAudioOut->MaxSamplesPerCycle();
279    
# Line 303  namespace LinuxSampler { namespace gig { Line 287  namespace LinuxSampler { namespace gig {
287          pDiskThread->StartThread();          pDiskThread->StartThread();
288          dmsg(1,("OK\n"));          dmsg(1,("OK\n"));
289    
290          for (Voice* pVoice = pVoicePool->first(); pVoice; pVoice = pVoicePool->next()) {          for (RTList<Voice>::Iterator iterVoice = pVoicePool->allocAppend(); iterVoice == pVoicePool->last(); iterVoice = pVoicePool->allocAppend()) {
291              if (!pVoice->pDiskThread) {              if (!iterVoice->pDiskThread) {
292                  dmsg(0,("Engine -> voice::trigger: !pDiskThread\n"));                  dmsg(0,("Engine -> voice::trigger: !pDiskThread\n"));
293                  exit(EXIT_FAILURE);                  exit(EXIT_FAILURE);
294              }              }
295          }          }
296      }      }
297    
298      void Engine::DisconnectAudioOutputDevice() {      /**
299          if (pAudioOutputDevice) { // if clause to prevent disconnect loops       * Clear all engine global event lists.
300              AudioOutputDevice* olddevice = pAudioOutputDevice;       */
301              pAudioOutputDevice = NULL;      void Engine::ClearEventLists() {
302              olddevice->Disconnect(this);          pGlobalEvents->clear();
303        }
304    
305        /**
306         * Copy all events from the engine's global input queue buffer to the
307         * engine's internal event list. This will be done at the beginning of
308         * each audio cycle (that is each RenderAudio() call) to distinguish
309         * all global events which have to be processed in the current audio
310         * cycle. These events are usually just SysEx messages. Every
311         * EngineChannel has it's own input event queue buffer and event list
312         * to handle common events like NoteOn, NoteOff and ControlChange
313         * events.
314         *
315         * @param Samples - number of sample points to be processed in the
316         *                  current audio cycle
317         */
318        void Engine::ImportEvents(uint Samples) {
319            RingBuffer<Event>::NonVolatileReader eventQueueReader = pEventQueue->get_non_volatile_reader();
320            Event* pEvent;
321            while (true) {
322                // get next event from input event queue
323                if (!(pEvent = eventQueueReader.pop())) break;
324                // if younger event reached, ignore that and all subsequent ones for now
325                if (pEvent->FragmentPos() >= Samples) {
326                    eventQueueReader--;
327                    dmsg(2,("Younger Event, pos=%d ,Samples=%d!\n",pEvent->FragmentPos(),Samples));
328                    pEvent->ResetFragmentPos();
329                    break;
330                }
331                // copy event to internal event list
332                if (pGlobalEvents->poolIsEmpty()) {
333                    dmsg(1,("Event pool emtpy!\n"));
334                    break;
335                }
336                *pGlobalEvents->allocAppend() = *pEvent;
337          }          }
338            eventQueueReader.free(); // free all copied events from input queue
339      }      }
340    
341      /**      /**
# Line 332  namespace LinuxSampler { namespace gig { Line 351  namespace LinuxSampler { namespace gig {
351      int Engine::RenderAudio(uint Samples) {      int Engine::RenderAudio(uint Samples) {
352          dmsg(5,("RenderAudio(Samples=%d)\n", Samples));          dmsg(5,("RenderAudio(Samples=%d)\n", Samples));
353    
354          // return if no instrument loaded or engine disabled          // return if engine disabled
355          if (EngineDisabled.Pop()) {          if (EngineDisabled.Pop()) {
356              dmsg(5,("gig::Engine: engine disabled (val=%d)\n",EngineDisabled.GetUnsafe()));              dmsg(5,("gig::Engine: engine disabled (val=%d)\n",EngineDisabled.GetUnsafe()));
357              return 0;              return 0;
358          }          }
         if (!pInstrument) {  
             dmsg(5,("gig::Engine: no instrument loaded\n"));  
             return 0;  
         }  
359    
360            // update time of start and end of this audio fragment (as events' time stamps relate to this)
361            pEventGenerator->UpdateFragmentTime(Samples);
362    
363          // empty the event lists for the new fragment          // We only allow a maximum of CONFIG_MAX_VOICES voices to be spawned
364          pEvents->clear();          // in each audio fragment. All subsequent request for spawning new
365          pCCEvents->clear();          // voices in the same audio fragment will be ignored.
366          for (uint i = 0; i < Event::destination_count; i++) {          VoiceSpawnsLeft = CONFIG_MAX_VOICES;
367              pSynthesisEvents[i]->clear();  
368            // get all events from the engine's global input event queue which belong to the current fragment
369            // (these are usually just SysEx messages)
370            ImportEvents(Samples);
371    
372            // process engine global events (these are currently only MIDI System Exclusive messages)
373            {
374                RTList<Event>::Iterator itEvent = pGlobalEvents->first();
375                RTList<Event>::Iterator end     = pGlobalEvents->end();
376                for (; itEvent != end; ++itEvent) {
377                    switch (itEvent->Type) {
378                        case Event::type_sysex:
379                            dmsg(5,("Engine: Sysex received\n"));
380                            ProcessSysex(itEvent);
381                            break;
382                    }
383                }
384          }          }
385    
386          // read and copy events from input queue          // reset internal voice counter (just for statistic of active voices)
387          Event event = pEventGenerator->CreateEvent();          ActiveVoiceCountTemp = 0;
         while (true) {  
             if (!pEventQueue->pop(&event)) break;  
             pEvents->alloc_assign(event);  
         }  
388    
389            // handle events on all engine channels
390            for (int i = 0; i < engineChannels.size(); i++) {
391                if (!engineChannels[i]->pInstrument) continue; // ignore if no instrument loaded
392                ProcessEvents(engineChannels[i], Samples);
393            }
394    
395          // 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
396          pEventGenerator->UpdateFragmentTime(Samples);          for (int i = 0; i < engineChannels.size(); i++) {
397                if (!engineChannels[i]->pInstrument) continue; // ignore if no instrument loaded
398                RenderActiveVoices(engineChannels[i], Samples);
399            }
400    
401            // now that all ordinary voices on ALL engine channels are rendered, render new stolen voices
402            RenderStolenVoices(Samples);
403    
404          // process events          // handle cleanup on all engine channels for the next audio fragment
405          Event* pNextEvent = pEvents->first();          for (int i = 0; i < engineChannels.size(); i++) {
406          while (pNextEvent) {              if (!engineChannels[i]->pInstrument) continue; // ignore if no instrument loaded
407              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;  
             }  
408          }          }
409    
410    
411          // render audio from all active voices          // empty the engine's event list for the next audio fragment
412          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  
         }  
413    
414            // reset voice stealing for the next audio fragment
415            pVoiceStealingQueue->clear();
416    
417          // write that to the disk thread class so that it can print it          // just some statistics about this engine instance
418          // on the console for debugging purposes          ActiveVoiceCount = ActiveVoiceCountTemp;
         ActiveVoiceCount = active_voices;  
419          if (ActiveVoiceCount > ActiveVoiceCountMax) ActiveVoiceCountMax = ActiveVoiceCount;          if (ActiveVoiceCount > ActiveVoiceCountMax) ActiveVoiceCountMax = ActiveVoiceCount;
420    
421            FrameTime += Samples;
422    
423          return 0;          return 0;
424      }      }
425    
426      /**      /**
427       *  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
428       *  voice for the given key.       * engine channel.
429       *       *
430       *  @param Key      - MIDI key number of the triggered key       * @param pEngineChannel - engine channel on which events should be
431       *  @param Velocity - MIDI velocity value of the triggered key       *                         processed
432         * @param Samples        - amount of sample points to be processed in
433         *                         this audio fragment cycle
434       */       */
435      void Engine::SendNoteOn(uint8_t Key, uint8_t Velocity) {      void Engine::ProcessEvents(EngineChannel* pEngineChannel, uint Samples) {
436          Event event    = pEventGenerator->CreateEvent();          // get all events from the engine channels's input event queue which belong to the current fragment
437          event.Type     = Event::type_note_on;          // (these are the common events like NoteOn, NoteOff, ControlChange, etc.)
438          event.Key      = Key;          pEngineChannel->ImportEvents(Samples);
439          event.Velocity = Velocity;  
440          if (this->pEventQueue->write_space() > 0) this->pEventQueue->push(&event);          // process events
441          else dmsg(1,("Engine: Input event queue full!"));          {
442                RTList<Event>::Iterator itEvent = pEngineChannel->pEvents->first();
443                RTList<Event>::Iterator end     = pEngineChannel->pEvents->end();
444                for (; itEvent != end; ++itEvent) {
445                    switch (itEvent->Type) {
446                        case Event::type_note_on:
447                            dmsg(5,("Engine: Note on received\n"));
448                            ProcessNoteOn((EngineChannel*)itEvent->pEngineChannel, itEvent);
449                            break;
450                        case Event::type_note_off:
451                            dmsg(5,("Engine: Note off received\n"));
452                            ProcessNoteOff((EngineChannel*)itEvent->pEngineChannel, itEvent);
453                            break;
454                        case Event::type_control_change:
455                            dmsg(5,("Engine: MIDI CC received\n"));
456                            ProcessControlChange((EngineChannel*)itEvent->pEngineChannel, itEvent);
457                            break;
458                        case Event::type_pitchbend:
459                            dmsg(5,("Engine: Pitchbend received\n"));
460                            ProcessPitchbend((EngineChannel*)itEvent->pEngineChannel, itEvent);
461                            break;
462                    }
463                }
464            }
465    
466            // reset voice stealing for the next engine channel (or next audio fragment)
467            itLastStolenVoice         = RTList<Voice>::Iterator();
468            itLastStolenVoiceGlobally = RTList<Voice>::Iterator();
469            iuiLastStolenKey          = RTList<uint>::Iterator();
470            iuiLastStolenKeyGlobally  = RTList<uint>::Iterator();
471            pLastStolenChannel        = NULL;
472      }      }
473    
474      /**      /**
475       *  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
476       *  voice(s) on the given key.       * this fragment) on the given engine channel.
477       *       *
478       *  @param Key      - MIDI key number of the released key       * @param pEngineChannel - engine channel on which audio should be
479       *  @param Velocity - MIDI release velocity value of the released key       *                         rendered
480         * @param Samples        - amount of sample points to be rendered in
481         *                         this audio fragment cycle
482       */       */
483      void Engine::SendNoteOff(uint8_t Key, uint8_t Velocity) {      void Engine::RenderActiveVoices(EngineChannel* pEngineChannel, uint Samples) {
484          Event event    = pEventGenerator->CreateEvent();          RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();
485          event.Type     = Event::type_note_off;          RTList<uint>::Iterator end    = pEngineChannel->pActiveKeys->end();
486          event.Key      = Key;          while (iuiKey != end) { // iterate through all active keys
487          event.Velocity = Velocity;              midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];
488          if (this->pEventQueue->write_space() > 0) this->pEventQueue->push(&event);              ++iuiKey;
489          else dmsg(1,("Engine: Input event queue full!"));  
490                RTList<Voice>::Iterator itVoice     = pKey->pActiveVoices->first();
491                RTList<Voice>::Iterator itVoicesEnd = pKey->pActiveVoices->end();
492                for (; itVoice != itVoicesEnd; ++itVoice) { // iterate through all voices on this key
493                    // now render current voice
494                    itVoice->Render(Samples);
495                    if (itVoice->IsActive()) ActiveVoiceCountTemp++; // still active
496                    else { // voice reached end, is now inactive
497                        FreeVoice(pEngineChannel, itVoice); // remove voice from the list of active voices
498                    }
499                }
500            }
501      }      }
502    
503      /**      /**
504       *  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
505       *  the pitch value for all voices.       * fragment) on the given engine channel. Stolen voices are rendered
506         * after all normal voices have been rendered; this is needed to render
507         * audio of those voices which were selected for voice stealing until
508         * the point were the stealing (that is the take over of the voice)
509         * actually happened.
510       *       *
511       *  @param Pitch - MIDI pitch value (-8192 ... +8191)       * @param pEngineChannel - engine channel on which audio should be
512         *                         rendered
513         * @param Samples        - amount of sample points to be rendered in
514         *                         this audio fragment cycle
515       */       */
516      void Engine::SendPitchbend(int Pitch) {      void Engine::RenderStolenVoices(uint Samples) {
517          Event event = pEventGenerator->CreateEvent();          RTList<Event>::Iterator itVoiceStealEvent = pVoiceStealingQueue->first();
518          event.Type  = Event::type_pitchbend;          RTList<Event>::Iterator end               = pVoiceStealingQueue->end();
519          event.Pitch = Pitch;          for (; itVoiceStealEvent != end; ++itVoiceStealEvent) {
520          if (this->pEventQueue->write_space() > 0) this->pEventQueue->push(&event);              EngineChannel* pEngineChannel = (EngineChannel*) itVoiceStealEvent->pEngineChannel;
521          else dmsg(1,("Engine: Input event queue full!"));              Pool<Voice>::Iterator itNewVoice =
522                    LaunchVoice(pEngineChannel, itVoiceStealEvent, itVoiceStealEvent->Param.Note.Layer, itVoiceStealEvent->Param.Note.ReleaseTrigger, false);
523                if (itNewVoice) {
524                    itNewVoice->Render(Samples);
525                    if (itNewVoice->IsActive()) ActiveVoiceCountTemp++; // still active
526                    else { // voice reached end, is now inactive
527                        FreeVoice(pEngineChannel, itNewVoice); // remove voice from the list of active voices
528                    }
529                }
530                else dmsg(1,("gig::Engine: ERROR, voice stealing didn't work out!\n"));
531    
532                // we need to clear the key's event list explicitly here in case key was never active
533                midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[itVoiceStealEvent->Param.Note.Key];
534                pKey->VoiceTheftsQueued--;
535                if (!pKey->Active && !pKey->VoiceTheftsQueued) pKey->pEvents->clear();
536            }
537      }      }
538    
539      /**      /**
540       *  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
541       *  continuous controller value has changed.       * the list of active keys and clear all event lists on that engine
542         * channel.
543       *       *
544       *  @param Controller - MIDI controller number of the occured control change       * @param pEngineChannel - engine channel to cleanup
      *  @param Value      - value of the control change  
545       */       */
546      void Engine::SendControlChange(uint8_t Controller, uint8_t Value) {      void Engine::PostProcess(EngineChannel* pEngineChannel) {
547          Event event      = pEventGenerator->CreateEvent();          // free all keys which have no active voices left
548          event.Type       = Event::type_control_change;          {
549          event.Controller = Controller;              RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();
550          event.Value      = Value;              RTList<uint>::Iterator end    = pEngineChannel->pActiveKeys->end();
551          if (this->pEventQueue->write_space() > 0) this->pEventQueue->push(&event);              while (iuiKey != end) { // iterate through all active keys
552                    midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];
553                    ++iuiKey;
554                    if (pKey->pActiveVoices->isEmpty()) FreeKey(pEngineChannel, pKey);
555                    #if CONFIG_DEVMODE
556                    else { // just a sanity check for debugging
557                        RTList<Voice>::Iterator itVoice     = pKey->pActiveVoices->first();
558                        RTList<Voice>::Iterator itVoicesEnd = pKey->pActiveVoices->end();
559                        for (; itVoice != itVoicesEnd; ++itVoice) { // iterate through all voices on this key
560                            if (itVoice->itKillEvent) {
561                                dmsg(1,("gig::Engine: ERROR, killed voice survived !!!\n"));
562                            }
563                        }
564                    }
565                    #endif // CONFIG_DEVMODE
566                }
567            }
568    
569            // empty the engine channel's own event lists
570            pEngineChannel->ClearEventLists();
571        }
572    
573        /**
574         *  Will be called by the MIDI input device whenever a MIDI system
575         *  exclusive message has arrived.
576         *
577         *  @param pData - pointer to sysex data
578         *  @param Size  - lenght of sysex data (in bytes)
579         */
580        void Engine::SendSysex(void* pData, uint Size) {
581            Event event             = pEventGenerator->CreateEvent();
582            event.Type              = Event::type_sysex;
583            event.Param.Sysex.Size  = Size;
584            event.pEngineChannel    = NULL; // as Engine global event
585            if (pEventQueue->write_space() > 0) {
586                if (pSysexBuffer->write_space() >= Size) {
587                    // copy sysex data to input buffer
588                    uint toWrite = Size;
589                    uint8_t* pPos = (uint8_t*) pData;
590                    while (toWrite) {
591                        const uint writeNow = RTMath::Min(toWrite, pSysexBuffer->write_space_to_end());
592                        pSysexBuffer->write(pPos, writeNow);
593                        toWrite -= writeNow;
594                        pPos    += writeNow;
595    
596                    }
597                    // finally place sysex event into input event queue
598                    pEventQueue->push(&event);
599                }
600                else dmsg(1,("Engine: Sysex message too large (%d byte) for input buffer (%d byte)!",Size,CONFIG_SYSEX_BUFFER_SIZE));
601            }
602          else dmsg(1,("Engine: Input event queue full!"));          else dmsg(1,("Engine: Input event queue full!"));
603      }      }
604    
605      /**      /**
606       *  Assigns and triggers a new voice for the respective MIDI key.       *  Assigns and triggers a new voice for the respective MIDI key.
607       *       *
608       *  @param pNoteOnEvent - key, velocity and time stamp of the event       *  @param pEngineChannel - engine channel on which this event occured on
609         *  @param itNoteOnEvent - key, velocity and time stamp of the event
610       */       */
611      void Engine::ProcessNoteOn(Event* pNoteOnEvent) {      void Engine::ProcessNoteOn(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOnEvent) {
612          midi_key_info_t* pKey = &pMIDIKeyInfo[pNoteOnEvent->Key];  
613            const int key = itNoteOnEvent->Param.Note.Key;
614    
615            // Change key dimension value if key is in keyswitching area
616            {
617                const ::gig::Instrument* pInstrument = pEngineChannel->pInstrument;
618                if (key >= pInstrument->DimensionKeyRange.low && key <= pInstrument->DimensionKeyRange.high)
619                    pEngineChannel->CurrentKeyDimension = ((key - pInstrument->DimensionKeyRange.low) * 128) /
620                        (pInstrument->DimensionKeyRange.high - pInstrument->DimensionKeyRange.low + 1);
621            }
622    
623            midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[key];
624    
625          pKey->KeyPressed = true; // the MIDI key was now pressed down          pKey->KeyPressed = true; // the MIDI key was now pressed down
626            pKey->Velocity   = itNoteOnEvent->Param.Note.Velocity;
627            pKey->NoteOnTime = FrameTime + itNoteOnEvent->FragmentPos(); // will be used to calculate note length
628    
629          // cancel release process of voices on this key if needed          // cancel release process of voices on this key if needed
630          if (pKey->Active && !SustainPedal) {          if (pKey->Active && !pEngineChannel->SustainPedal) {
631              pNoteOnEvent->Type = Event::type_cancel_release; // transform event type              RTList<Event>::Iterator itCancelReleaseEvent = pKey->pEvents->allocAppend();
632              pEvents->move(pNoteOnEvent, pKey->pEvents); // move event to the key's own event list              if (itCancelReleaseEvent) {
633                    *itCancelReleaseEvent = *itNoteOnEvent;                  // copy event
634                    itCancelReleaseEvent->Type = Event::type_cancel_release; // transform event type
635                }
636                else dmsg(1,("Event pool emtpy!\n"));
637          }          }
638    
639          // allocate a new voice for the key          // move note on event to the key's own event list
640          Voice* pNewVoice = pKey->pActiveVoices->alloc();          RTList<Event>::Iterator itNoteOnEventOnKeyList = itNoteOnEvent.moveToEndOf(pKey->pEvents);
641          if (pNewVoice) {  
642              // launch the new voice          // allocate and trigger new voice(s) for the key
643              if (pNewVoice->Trigger(pNoteOnEvent, this->Pitch, this->pInstrument) < 0) {          {
644                  dmsg(1,("Triggering new voice failed!\n"));              // first, get total amount of required voices (dependant on amount of layers)
645                  pKey->pActiveVoices->free(pNewVoice);              ::gig::Region* pRegion = pEngineChannel->pInstrument->GetRegion(itNoteOnEventOnKeyList->Param.Note.Key);
646              }              if (pRegion) {
647              else if (!pKey->Active) { // mark as active key                  int voicesRequired = pRegion->Layers;
648                  pKey->Active = true;                  // now launch the required amount of voices
649                  pKey->pSelf  = pActiveKeys->alloc();                  for (int i = 0; i < voicesRequired; i++)
650                  *pKey->pSelf = pNoteOnEvent->Key;                      LaunchVoice(pEngineChannel, itNoteOnEventOnKeyList, i, false, true);
651              }              }
652          }          }
653          else std::cerr << "No free voice!" << std::endl << std::flush;  
654            // if neither a voice was spawned or postponed then remove note on event from key again
655            if (!pKey->Active && !pKey->VoiceTheftsQueued)
656                pKey->pEvents->free(itNoteOnEventOnKeyList);
657    
658            pKey->RoundRobinIndex++;
659      }      }
660    
661      /**      /**
# Line 525  namespace LinuxSampler { namespace gig { Line 664  namespace LinuxSampler { namespace gig {
664       *  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.
665       *  due to completion of sample playback).       *  due to completion of sample playback).
666       *       *
667       *  @param pNoteOffEvent - key, velocity and time stamp of the event       *  @param pEngineChannel - engine channel on which this event occured on
668         *  @param itNoteOffEvent - key, velocity and time stamp of the event
669       */       */
670      void Engine::ProcessNoteOff(Event* pNoteOffEvent) {      void Engine::ProcessNoteOff(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOffEvent) {
671          midi_key_info_t* pKey = &pMIDIKeyInfo[pNoteOffEvent->Key];          midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[itNoteOffEvent->Param.Note.Key];
672    
673          pKey->KeyPressed = false; // the MIDI key was now released          pKey->KeyPressed = false; // the MIDI key was now released
674    
675          // release voices on this key if needed          // release voices on this key if needed
676          if (pKey->Active && !SustainPedal) {          if (pKey->Active && !pEngineChannel->SustainPedal) {
677              pNoteOffEvent->Type = Event::type_release; // transform event type              itNoteOffEvent->Type = Event::type_release; // transform event type
678              pEvents->move(pNoteOffEvent, pKey->pEvents); // move event to the key's own event list  
679                // move event to the key's own event list
680                RTList<Event>::Iterator itNoteOffEventOnKeyList = itNoteOffEvent.moveToEndOf(pKey->pEvents);
681    
682                // spawn release triggered voice(s) if needed
683                if (pKey->ReleaseTrigger) {
684                    // first, get total amount of required voices (dependant on amount of layers)
685                    ::gig::Region* pRegion = pEngineChannel->pInstrument->GetRegion(itNoteOffEventOnKeyList->Param.Note.Key);
686                    if (pRegion) {
687                        int voicesRequired = pRegion->Layers;
688    
689                        // MIDI note-on velocity is used instead of note-off velocity
690                        itNoteOffEventOnKeyList->Param.Note.Velocity = pKey->Velocity;
691    
692                        // now launch the required amount of voices
693                        for (int i = 0; i < voicesRequired; i++)
694                            LaunchVoice(pEngineChannel, itNoteOffEventOnKeyList, i, true, false); //FIXME: for the moment we don't perform voice stealing for release triggered samples
695                    }
696                    pKey->ReleaseTrigger = false;
697                }
698    
699                // if neither a voice was spawned or postponed then remove note off event from key again
700                if (!pKey->Active && !pKey->VoiceTheftsQueued)
701                    pKey->pEvents->free(itNoteOffEventOnKeyList);
702          }          }
703      }      }
704    
# Line 543  namespace LinuxSampler { namespace gig { Line 706  namespace LinuxSampler { namespace gig {
706       *  Moves pitchbend event from the general (input) event list to the pitch       *  Moves pitchbend event from the general (input) event list to the pitch
707       *  event list.       *  event list.
708       *       *
709       *  @param pPitchbendEvent - absolute pitch value and time stamp of the event       *  @param pEngineChannel - engine channel on which this event occured on
710         *  @param itPitchbendEvent - absolute pitch value and time stamp of the event
711         */
712        void Engine::ProcessPitchbend(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itPitchbendEvent) {
713            pEngineChannel->Pitch = itPitchbendEvent->Param.Pitch.Pitch; // store current pitch value
714            itPitchbendEvent.moveToEndOf(pEngineChannel->pSynthesisEvents[Event::destination_vco]);
715        }
716    
717        /**
718         *  Allocates and triggers a new voice. This method will usually be
719         *  called by the ProcessNoteOn() method and by the voices itself
720         *  (e.g. to spawn further voices on the same key for layered sounds).
721         *
722         *  @param pEngineChannel      - engine channel on which this event occured on
723         *  @param itNoteOnEvent       - key, velocity and time stamp of the event
724         *  @param iLayer              - layer index for the new voice (optional - only
725         *                               in case of layered sounds of course)
726         *  @param ReleaseTriggerVoice - if new voice is a release triggered voice
727         *                               (optional, default = false)
728         *  @param VoiceStealing       - if voice stealing should be performed
729         *                               when there is no free voice
730         *                               (optional, default = true)
731         *  @returns pointer to new voice or NULL if there was no free voice or
732         *           if the voice wasn't triggered (for example when no region is
733         *           defined for the given key).
734         */
735        Pool<Voice>::Iterator Engine::LaunchVoice(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOnEvent, int iLayer, bool ReleaseTriggerVoice, bool VoiceStealing) {
736            midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[itNoteOnEvent->Param.Note.Key];
737    
738            // allocate a new voice for the key
739            Pool<Voice>::Iterator itNewVoice = pKey->pActiveVoices->allocAppend();
740            if (itNewVoice) {
741                // launch the new voice
742                if (itNewVoice->Trigger(pEngineChannel, itNoteOnEvent, pEngineChannel->Pitch, pEngineChannel->pInstrument, iLayer, ReleaseTriggerVoice, VoiceStealing) < 0) {
743                    dmsg(4,("Voice not triggered\n"));
744                    pKey->pActiveVoices->free(itNewVoice);
745                }
746                else { // on success
747                    --VoiceSpawnsLeft;
748                    uint** ppKeyGroup = NULL;
749                    if (itNewVoice->KeyGroup) { // if this voice / key belongs to a key group
750                        ppKeyGroup = &pEngineChannel->ActiveKeyGroups[itNewVoice->KeyGroup];
751                        if (*ppKeyGroup) { // if there's already an active key in that key group
752                            midi_key_info_t* pOtherKey = &pEngineChannel->pMIDIKeyInfo[**ppKeyGroup];
753                            // kill all voices on the (other) key
754                            RTList<Voice>::Iterator itVoiceToBeKilled = pOtherKey->pActiveVoices->first();
755                            RTList<Voice>::Iterator end               = pOtherKey->pActiveVoices->end();
756                            for (; itVoiceToBeKilled != end; ++itVoiceToBeKilled) {
757                                if (itVoiceToBeKilled->Type != Voice::type_release_trigger) {
758                                    itVoiceToBeKilled->Kill(itNoteOnEvent);
759                                    --VoiceSpawnsLeft; //FIXME: just a hack, we should better check in StealVoice() if the voice was killed due to key conflict
760                                }
761                            }
762                        }
763                    }
764                    if (!pKey->Active) { // mark as active key
765                        pKey->Active = true;
766                        pKey->itSelf = pEngineChannel->pActiveKeys->allocAppend();
767                        *pKey->itSelf = itNoteOnEvent->Param.Note.Key;
768                    }
769                    if (itNewVoice->KeyGroup) {
770                        *ppKeyGroup = &*pKey->itSelf; // put key as the (new) active key to its key group
771                    }
772                    if (itNewVoice->Type == Voice::type_release_trigger_required) pKey->ReleaseTrigger = true; // mark key for the need of release triggered voice(s)
773                    return itNewVoice; // success
774                }
775            }
776            else if (VoiceStealing) {
777                // try to steal one voice
778                int result = StealVoice(pEngineChannel, itNoteOnEvent);
779                if (!result) { // voice stolen successfully
780                    // put note-on event into voice-stealing queue, so it will be reprocessed after killed voice died
781                    RTList<Event>::Iterator itStealEvent = pVoiceStealingQueue->allocAppend();
782                    if (itStealEvent) {
783                        *itStealEvent = *itNoteOnEvent; // copy event
784                        itStealEvent->Param.Note.Layer = iLayer;
785                        itStealEvent->Param.Note.ReleaseTrigger = ReleaseTriggerVoice;
786                        pKey->VoiceTheftsQueued++;
787                    }
788                    else dmsg(1,("Voice stealing queue full!\n"));
789                }
790            }
791    
792            return Pool<Voice>::Iterator(); // no free voice or error
793        }
794    
795        /**
796         *  Will be called by LaunchVoice() method in case there are no free
797         *  voices left. This method will select and kill one old voice for
798         *  voice stealing and postpone the note-on event until the selected
799         *  voice actually died.
800         *
801         *  @param pEngineChannel - engine channel on which this event occured on
802         *  @param itNoteOnEvent - key, velocity and time stamp of the event
803         *  @returns 0 on success, a value < 0 if no active voice could be picked for voice stealing
804       */       */
805      void Engine::ProcessPitchbend(Event* pPitchbendEvent) {      int Engine::StealVoice(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOnEvent) {
806          this->Pitch = pPitchbendEvent->Pitch; // store current pitch value          if (VoiceSpawnsLeft <= 0) {
807          pEvents->move(pPitchbendEvent, pSynthesisEvents[Event::destination_vco]);              dmsg(1,("Max. voice thefts per audio fragment reached (you may raise CONFIG_MAX_VOICES).\n"));
808                return -1;
809            }
810            if (!pEventPool->poolIsEmpty()) {
811    
812                RTList<Voice>::Iterator itSelectedVoice;
813    
814                // Select one voice for voice stealing
815                switch (CONFIG_VOICE_STEAL_ALGO) {
816    
817                    // try to pick the oldest voice on the key where the new
818                    // voice should be spawned, if there is no voice on that
819                    // key, or no voice left to kill, then procceed with
820                    // 'oldestkey' algorithm
821                    case voice_steal_algo_oldestvoiceonkey: {
822                        midi_key_info_t* pSelectedKey = &pEngineChannel->pMIDIKeyInfo[itNoteOnEvent->Param.Note.Key];
823                        itSelectedVoice = pSelectedKey->pActiveVoices->first();
824                        // proceed iterating if voice was created in this fragment cycle
825                        while (itSelectedVoice && !itSelectedVoice->IsStealable()) ++itSelectedVoice;
826                        // if we haven't found a voice then proceed with algorithm 'oldestkey'
827                        if (itSelectedVoice && itSelectedVoice->IsStealable()) break;
828                    } // no break - intentional !
829    
830                    // try to pick the oldest voice on the oldest active key
831                    // from the same engine channel
832                    // (caution: must stay after 'oldestvoiceonkey' algorithm !)
833                    case voice_steal_algo_oldestkey: {
834                        // if we already stole in this fragment, try to proceed on same key
835                        if (this->itLastStolenVoice) {
836                            itSelectedVoice = this->itLastStolenVoice;
837                            do {
838                                ++itSelectedVoice;
839                            } while (itSelectedVoice && !itSelectedVoice->IsStealable()); // proceed iterating if voice was created in this fragment cycle
840                            // found a "stealable" voice ?
841                            if (itSelectedVoice && itSelectedVoice->IsStealable()) {
842                                // remember which voice we stole, so we can simply proceed on next voice stealing
843                                this->itLastStolenVoice = itSelectedVoice;
844                                break; // selection succeeded
845                            }
846                        }
847                        // get (next) oldest key
848                        RTList<uint>::Iterator iuiSelectedKey = (this->iuiLastStolenKey) ? ++this->iuiLastStolenKey : pEngineChannel->pActiveKeys->first();
849                        while (iuiSelectedKey) {
850                            midi_key_info_t* pSelectedKey = &pEngineChannel->pMIDIKeyInfo[*iuiSelectedKey];
851                            itSelectedVoice = pSelectedKey->pActiveVoices->first();
852                            // proceed iterating if voice was created in this fragment cycle
853                            while (itSelectedVoice && !itSelectedVoice->IsStealable()) ++itSelectedVoice;
854                            // found a "stealable" voice ?
855                            if (itSelectedVoice && itSelectedVoice->IsStealable()) {
856                                // remember which voice on which key we stole, so we can simply proceed on next voice stealing
857                                this->iuiLastStolenKey  = iuiSelectedKey;
858                                this->itLastStolenVoice = itSelectedVoice;
859                                break; // selection succeeded
860                            }
861                            ++iuiSelectedKey; // get next oldest key
862                        }
863                        break;
864                    }
865    
866                    // don't steal anything
867                    case voice_steal_algo_none:
868                    default: {
869                        dmsg(1,("No free voice (voice stealing disabled)!\n"));
870                        return -1;
871                    }
872                }
873    
874                // if we couldn't steal a voice from the same engine channel then
875                // steal oldest voice on the oldest key from any other engine channel
876                // (the smaller engine channel number, the higher priority)
877                if (!itSelectedVoice || !itSelectedVoice->IsStealable()) {
878                    EngineChannel* pSelectedChannel;
879                    int            iChannelIndex;
880                    // select engine channel
881                    if (pLastStolenChannel) {
882                        pSelectedChannel = pLastStolenChannel;
883                        iChannelIndex    = pSelectedChannel->iEngineIndexSelf;
884                    } else { // pick the engine channel followed by this engine channel
885                        iChannelIndex    = (pEngineChannel->iEngineIndexSelf + 1) % engineChannels.size();
886                        pSelectedChannel = engineChannels[iChannelIndex];
887                    }
888    
889                    // if we already stole in this fragment, try to proceed on same key
890                    if (this->itLastStolenVoiceGlobally) {
891                        itSelectedVoice = this->itLastStolenVoiceGlobally;
892                        do {
893                            ++itSelectedVoice;
894                        } while (itSelectedVoice && !itSelectedVoice->IsStealable()); // proceed iterating if voice was created in this fragment cycle
895                    }
896    
897                    #if CONFIG_DEVMODE
898                    EngineChannel* pBegin = pSelectedChannel; // to detect endless loop
899                    #endif // CONFIG_DEVMODE
900    
901                    // did we find a 'stealable' voice?
902                    if (itSelectedVoice && itSelectedVoice->IsStealable()) {
903                        // remember which voice we stole, so we can simply proceed on next voice stealing
904                        this->itLastStolenVoiceGlobally = itSelectedVoice;
905                    } else while (true) { // iterate through engine channels
906                        // get (next) oldest key
907                        RTList<uint>::Iterator iuiSelectedKey = (this->iuiLastStolenKeyGlobally) ? ++this->iuiLastStolenKeyGlobally : pSelectedChannel->pActiveKeys->first();
908                        this->iuiLastStolenKeyGlobally = RTList<uint>::Iterator(); // to prevent endless loop (see line above)
909                        while (iuiSelectedKey) {
910                            midi_key_info_t* pSelectedKey = &pSelectedChannel->pMIDIKeyInfo[*iuiSelectedKey];
911                            itSelectedVoice = pSelectedKey->pActiveVoices->first();
912                            // proceed iterating if voice was created in this fragment cycle
913                            while (itSelectedVoice && !itSelectedVoice->IsStealable()) ++itSelectedVoice;
914                            // found a "stealable" voice ?
915                            if (itSelectedVoice && itSelectedVoice->IsStealable()) {
916                                // remember which voice on which key on which engine channel we stole, so we can simply proceed on next voice stealing
917                                this->iuiLastStolenKeyGlobally  = iuiSelectedKey;
918                                this->itLastStolenVoiceGlobally = itSelectedVoice;
919                                this->pLastStolenChannel        = pSelectedChannel;
920                                break; // selection succeeded
921                            }
922                            ++iuiSelectedKey; // get next key on current engine channel
923                        }
924                        // get next engine channel
925                        iChannelIndex    = (iChannelIndex + 1) % engineChannels.size();
926                        pSelectedChannel = engineChannels[iChannelIndex];
927    
928                        #if CONFIG_DEVMODE
929                        if (pSelectedChannel == pBegin) {
930                            dmsg(1,("FATAL ERROR: voice stealing endless loop!\n"));
931                            dmsg(1,("VoiceSpawnsLeft=%d.\n", VoiceSpawnsLeft));
932                            dmsg(1,("Exiting.\n"));
933                            exit(-1);
934                        }
935                        #endif // CONFIG_DEVMODE
936                    }
937                }
938    
939                #if CONFIG_DEVMODE
940                if (!itSelectedVoice->IsActive()) {
941                    dmsg(1,("gig::Engine: ERROR, tried to steal a voice which was not active !!!\n"));
942                    return -1;
943                }
944                #endif // CONFIG_DEVMODE
945    
946                // now kill the selected voice
947                itSelectedVoice->Kill(itNoteOnEvent);
948    
949                --VoiceSpawnsLeft;
950    
951                return 0; // success
952            }
953            else {
954                dmsg(1,("Event pool emtpy!\n"));
955                return -1;
956            }
957      }      }
958    
959      /**      /**
960       *  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.
961       *  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
962       *  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
963         *  just was killed.
964       *       *
965       *  @param pVoice - points to the voice to be killed       *  @param pEngineChannel - engine channel on which this event occured on
966         *  @param itVoice - points to the voice to be freed
967       */       */
968      void Engine::KillVoice(Voice* pVoice) {      void Engine::FreeVoice(EngineChannel* pEngineChannel, Pool<Voice>::Iterator& itVoice) {
969          if (pVoice) {          if (itVoice) {
970              if (pVoice->IsActive()) pVoice->Kill();              midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[itVoice->MIDIKey];
971    
972              midi_key_info_t* pKey = &pMIDIKeyInfo[pVoice->MIDIKey];              uint keygroup = itVoice->KeyGroup;
973    
974              // free the voice object              // free the voice object
975              pVoicePool->free(pVoice);              pVoicePool->free(itVoice);
976    
977              // 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
978              if (pKey->pActiveVoices->is_empty()) {              if (pKey->pActiveVoices->isEmpty() && keygroup) {
979                  pKey->Active = false;                  uint** ppKeyGroup = &pEngineChannel->ActiveKeyGroups[keygroup];
980                  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"));  
981              }              }
982          }          }
983          else std::cerr << "Couldn't release voice! (pVoice == NULL)\n" << std::flush;          else std::cerr << "Couldn't release voice! (!itVoice)\n" << std::flush;
984        }
985    
986        /**
987         *  Called when there's no more voice left on a key, this call will
988         *  update the key info respectively.
989         *
990         *  @param pEngineChannel - engine channel on which this event occured on
991         *  @param pKey - key which is now inactive
992         */
993        void Engine::FreeKey(EngineChannel* pEngineChannel, midi_key_info_t* pKey) {
994            if (pKey->pActiveVoices->isEmpty()) {
995                pKey->Active = false;
996                pEngineChannel->pActiveKeys->free(pKey->itSelf); // remove key from list of active keys
997                pKey->itSelf = RTList<uint>::Iterator();
998                pKey->ReleaseTrigger = false;
999                pKey->pEvents->clear();
1000                dmsg(3,("Key has no more voices now\n"));
1001            }
1002            else dmsg(1,("gig::Engine: Oops, tried to free a key which contains voices.\n"));
1003      }      }
1004    
1005      /**      /**
1006       *  Reacts on supported control change commands (e.g. pitch bend wheel,       *  Reacts on supported control change commands (e.g. pitch bend wheel,
1007       *  modulation wheel, aftertouch).       *  modulation wheel, aftertouch).
1008       *       *
1009       *  @param pControlChangeEvent - controller, value and time stamp of the event       *  @param pEngineChannel - engine channel on which this event occured on
1010         *  @param itControlChangeEvent - controller, value and time stamp of the event
1011       */       */
1012      void Engine::ProcessControlChange(Event* pControlChangeEvent) {      void Engine::ProcessControlChange(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itControlChangeEvent) {
1013          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));
1014    
1015          switch (pControlChangeEvent->Controller) {          // update controller value in the engine channel's controller table
1016              case 64: {          pEngineChannel->ControllerTable[itControlChangeEvent->Param.CC.Controller] = itControlChangeEvent->Param.CC.Value;
1017                  if (pControlChangeEvent->Value >= 64 && !SustainPedal) {  
1018            // move event from the unsorted event list to the control change event list
1019            Pool<Event>::Iterator itControlChangeEventOnCCList = itControlChangeEvent.moveToEndOf(pEngineChannel->pCCEvents);
1020    
1021            switch (itControlChangeEventOnCCList->Param.CC.Controller) {
1022                case 7: { // volume
1023                    //TODO: not sample accurate yet
1024                    pEngineChannel->GlobalVolume = (float) itControlChangeEventOnCCList->Param.CC.Value / 127.0f;
1025                    pEngineChannel->bStatusChanged = true; // engine channel status has changed, so set notify flag
1026                    break;
1027                }
1028                case 10: { // panpot
1029                    //TODO: not sample accurate yet
1030                    const int pan = (int) itControlChangeEventOnCCList->Param.CC.Value - 64;
1031                    pEngineChannel->GlobalPanLeft  = 1.0f - float(RTMath::Max(pan, 0)) /  63.0f;
1032                    pEngineChannel->GlobalPanRight = 1.0f - float(RTMath::Min(pan, 0)) / -64.0f;
1033                    break;
1034                }
1035                case 64: { // sustain
1036                    if (itControlChangeEventOnCCList->Param.CC.Value >= 64 && !pEngineChannel->SustainPedal) {
1037                      dmsg(4,("PEDAL DOWN\n"));                      dmsg(4,("PEDAL DOWN\n"));
1038                      SustainPedal = true;                      pEngineChannel->SustainPedal = true;
1039    
1040                      // cancel release process of voices if necessary                      // cancel release process of voices if necessary
1041                      uint* piKey = pActiveKeys->first();                      RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();
1042                      if (piKey) {                      for (; iuiKey; ++iuiKey) {
1043                          pControlChangeEvent->Type = Event::type_cancel_release; // transform event type                          midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];
1044                          while (piKey) {                          if (!pKey->KeyPressed) {
1045                              midi_key_info_t* pKey = &pMIDIKeyInfo[*piKey];                              RTList<Event>::Iterator itNewEvent = pKey->pEvents->allocAppend();
1046                              pActiveKeys->set_current(piKey);                              if (itNewEvent) {
1047                              piKey = pActiveKeys->next();                                  *itNewEvent = *itControlChangeEventOnCCList; // copy event to the key's own event list
1048                              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"));  
1049                              }                              }
1050                                else dmsg(1,("Event pool emtpy!\n"));
1051                          }                          }
1052                      }                      }
1053                  }                  }
1054                  if (pControlChangeEvent->Value < 64 && SustainPedal) {                  if (itControlChangeEventOnCCList->Param.CC.Value < 64 && pEngineChannel->SustainPedal) {
1055                      dmsg(4,("PEDAL UP\n"));                      dmsg(4,("PEDAL UP\n"));
1056                      SustainPedal = false;                      pEngineChannel->SustainPedal = false;
1057    
1058                      // release voices if their respective key is not pressed                      // release voices if their respective key is not pressed
1059                      uint* piKey = pActiveKeys->first();                      RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();
1060                      if (piKey) {                      for (; iuiKey; ++iuiKey) {
1061                          pControlChangeEvent->Type = Event::type_release; // transform event type                          midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];
1062                          while (piKey) {                          if (!pKey->KeyPressed) {
1063                              midi_key_info_t* pKey = &pMIDIKeyInfo[*piKey];                              RTList<Event>::Iterator itNewEvent = pKey->pEvents->allocAppend();
1064                              pActiveKeys->set_current(piKey);                              if (itNewEvent) {
1065                              piKey = pActiveKeys->next();                                  *itNewEvent = *itControlChangeEventOnCCList; // copy event to the key's own event list
1066                              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"));  
1067                              }                              }
1068                                else dmsg(1,("Event pool emtpy!\n"));
1069                          }                          }
1070                      }                      }
1071                  }                  }
1072                  break;                  break;
1073              }              }
1074    
1075    
1076                // Channel Mode Messages
1077    
1078                case 120: { // all sound off
1079                    KillAllVoices(pEngineChannel, itControlChangeEventOnCCList);
1080                    break;
1081                }
1082                case 121: { // reset all controllers
1083                    pEngineChannel->ResetControllers();
1084                    break;
1085                }
1086                case 123: { // all notes off
1087                    ReleaseAllVoices(pEngineChannel, itControlChangeEventOnCCList);
1088                    break;
1089                }
1090          }          }
1091        }
1092    
1093          // update controller value in the engine's controller table      /**
1094          ControllerTable[pControlChangeEvent->Controller] = pControlChangeEvent->Value;       *  Reacts on MIDI system exclusive messages.
1095         *
1096         *  @param itSysexEvent - sysex data size and time stamp of the sysex event
1097         */
1098        void Engine::ProcessSysex(Pool<Event>::Iterator& itSysexEvent) {
1099            RingBuffer<uint8_t>::NonVolatileReader reader = pSysexBuffer->get_non_volatile_reader();
1100    
1101          // move event from the unsorted event list to the control change event list          uint8_t exclusive_status, id;
1102          pEvents->move(pControlChangeEvent, pCCEvents);          if (!reader.pop(&exclusive_status)) goto free_sysex_data;
1103            if (!reader.pop(&id))               goto free_sysex_data;
1104            if (exclusive_status != 0xF0)       goto free_sysex_data;
1105    
1106            switch (id) {
1107                case 0x41: { // Roland
1108                    dmsg(3,("Roland Sysex\n"));
1109                    uint8_t device_id, model_id, cmd_id;
1110                    if (!reader.pop(&device_id)) goto free_sysex_data;
1111                    if (!reader.pop(&model_id))  goto free_sysex_data;
1112                    if (!reader.pop(&cmd_id))    goto free_sysex_data;
1113                    if (model_id != 0x42 /*GS*/) goto free_sysex_data;
1114                    if (cmd_id != 0x12 /*DT1*/)  goto free_sysex_data;
1115    
1116                    // command address
1117                    uint8_t addr[3]; // 2 byte addr MSB, followed by 1 byte addr LSB)
1118                    const RingBuffer<uint8_t>::NonVolatileReader checksum_reader = reader; // so we can calculate the check sum later
1119                    if (reader.read(&addr[0], 3) != 3) goto free_sysex_data;
1120                    if (addr[0] == 0x40 && addr[1] == 0x00) { // System Parameters
1121                        dmsg(3,("\tSystem Parameter\n"));
1122                    }
1123                    else if (addr[0] == 0x40 && addr[1] == 0x01) { // Common Parameters
1124                        dmsg(3,("\tCommon Parameter\n"));
1125                    }
1126                    else if (addr[0] == 0x40 && (addr[1] & 0xf0) == 0x10) { // Part Parameters (1)
1127                        dmsg(3,("\tPart Parameter\n"));
1128                        switch (addr[2]) {
1129                            case 0x40: { // scale tuning
1130                                dmsg(3,("\t\tScale Tuning\n"));
1131                                uint8_t scale_tunes[12]; // detuning of all 12 semitones of an octave
1132                                if (reader.read(&scale_tunes[0], 12) != 12) goto free_sysex_data;
1133                                uint8_t checksum;
1134                                if (!reader.pop(&checksum)) goto free_sysex_data;
1135                                #if CONFIG_ASSERT_GS_SYSEX_CHECKSUM
1136                                if (GSCheckSum(checksum_reader, 12)) goto free_sysex_data;
1137                                #endif // CONFIG_ASSERT_GS_SYSEX_CHECKSUM
1138                                for (int i = 0; i < 12; i++) scale_tunes[i] -= 64;
1139                                AdjustScale((int8_t*) scale_tunes);
1140                                dmsg(3,("\t\t\tNew scale applied.\n"));
1141                                break;
1142                            }
1143                        }
1144                    }
1145                    else if (addr[0] == 0x40 && (addr[1] & 0xf0) == 0x20) { // Part Parameters (2)
1146                    }
1147                    else if (addr[0] == 0x41) { // Drum Setup Parameters
1148                    }
1149                    break;
1150                }
1151            }
1152    
1153            free_sysex_data: // finally free sysex data
1154            pSysexBuffer->increment_read_ptr(itSysexEvent->Param.Sysex.Size);
1155        }
1156    
1157        /**
1158         * Calculates the Roland GS sysex check sum.
1159         *
1160         * @param AddrReader - reader which currently points to the first GS
1161         *                     command address byte of the GS sysex message in
1162         *                     question
1163         * @param DataSize   - size of the GS message data (in bytes)
1164         */
1165        uint8_t Engine::GSCheckSum(const RingBuffer<uint8_t>::NonVolatileReader AddrReader, uint DataSize) {
1166            RingBuffer<uint8_t>::NonVolatileReader reader = AddrReader;
1167            uint bytes = 3 /*addr*/ + DataSize;
1168            uint8_t addr_and_data[bytes];
1169            reader.read(&addr_and_data[0], bytes);
1170            uint8_t sum = 0;
1171            for (uint i = 0; i < bytes; i++) sum += addr_and_data[i];
1172            return 128 - sum % 128;
1173        }
1174    
1175        /**
1176         * Allows to tune each of the twelve semitones of an octave.
1177         *
1178         * @param ScaleTunes - detuning of all twelve semitones (in cents)
1179         */
1180        void Engine::AdjustScale(int8_t ScaleTunes[12]) {
1181            memcpy(&this->ScaleTuning[0], &ScaleTunes[0], 12); //TODO: currently not sample accurate
1182        }
1183    
1184        /**
1185         * Releases all voices on an engine channel. All voices will go into
1186         * the release stage and thus it might take some time (e.g. dependant to
1187         * their envelope release time) until they actually die.
1188         *
1189         * @param pEngineChannel - engine channel on which all voices should be released
1190         * @param itReleaseEvent - event which caused this releasing of all voices
1191         */
1192        void Engine::ReleaseAllVoices(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itReleaseEvent) {
1193            RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();
1194            while (iuiKey) {
1195                midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];
1196                ++iuiKey;
1197                // append a 'release' event to the key's own event list
1198                RTList<Event>::Iterator itNewEvent = pKey->pEvents->allocAppend();
1199                if (itNewEvent) {
1200                    *itNewEvent = *itReleaseEvent; // copy original event (to the key's event list)
1201                    itNewEvent->Type = Event::type_release; // transform event type
1202                }
1203                else dmsg(1,("Event pool emtpy!\n"));
1204            }
1205        }
1206    
1207        /**
1208         * Kills all voices on an engine channel as soon as possible. Voices
1209         * won't get into release state, their volume level will be ramped down
1210         * as fast as possible.
1211         *
1212         * @param pEngineChannel - engine channel on which all voices should be killed
1213         * @param itKillEvent    - event which caused this killing of all voices
1214         */
1215        void Engine::KillAllVoices(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itKillEvent) {
1216            RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();
1217            RTList<uint>::Iterator end    = pEngineChannel->pActiveKeys->end();
1218            while (iuiKey != end) { // iterate through all active keys
1219                midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];
1220                ++iuiKey;
1221                RTList<Voice>::Iterator itVoice     = pKey->pActiveVoices->first();
1222                RTList<Voice>::Iterator itVoicesEnd = pKey->pActiveVoices->end();
1223                for (; itVoice != itVoicesEnd; ++itVoice) { // iterate through all voices on this key
1224                    itVoice->Kill(itKillEvent);
1225                    --VoiceSpawnsLeft; //FIXME: just a temporary workaround, we should check the cause in StealVoice() instead
1226                }
1227            }
1228      }      }
1229    
1230      /**      /**
# Line 654  namespace LinuxSampler { namespace gig { Line 1242  namespace LinuxSampler { namespace gig {
1242          }          }
1243      }      }
1244    
     float Engine::Volume() {  
         return GlobalVolume;  
     }  
   
     void Engine::Volume(float f) {  
         GlobalVolume = f;  
     }  
   
1245      uint Engine::VoiceCount() {      uint Engine::VoiceCount() {
1246          return ActiveVoiceCount;          return ActiveVoiceCount;
1247      }      }
# Line 690  namespace LinuxSampler { namespace gig { Line 1270  namespace LinuxSampler { namespace gig {
1270          return pDiskThread->GetBufferFillPercentage();          return pDiskThread->GetBufferFillPercentage();
1271      }      }
1272    
1273        String Engine::EngineName() {
1274            return LS_GIG_ENGINE_NAME;
1275        }
1276    
1277      String Engine::Description() {      String Engine::Description() {
1278          return "Gigasampler Engine";          return "Gigasampler Engine";
1279      }      }
1280    
1281      String Engine::Version() {      String Engine::Version() {
1282          return "0.0.1-0cvs20040423";          String s = "$Revision: 1.44 $";
1283            return s.substr(11, s.size() - 13); // cut dollar signs, spaces and CVS macro keyword
1284      }      }
1285    
1286  }} // namespace LinuxSampler::gig  }} // namespace LinuxSampler::gig
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