/[svn]/linuxsampler/trunk/src/engines/gig/Engine.cpp
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revision 242 by schoenebeck, Wed Sep 15 13:59:08 2004 UTC revision 420 by schoenebeck, Thu Mar 3 03:25:17 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.push_back(pChannel);
68            dmsg(4,("This gig::Engine has now %d EngineChannels.\n",pEngine->engineChannels.size()));
69            return pEngine;
70        }
71    
72        /**
73         * Once an engine channel is disconnected from an audio output device,
74         * it wil immediately call this method to unregister itself from the
75         * engine instance and if that engine instance is not used by any other
76         * engine channel anymore, then that engine instance will be destroyed.
77         *
78         * @param pChannel - engine channel which wants to disconnect from it's
79         *                   engine instance
80         * @param pDevice  - audio output device \a pChannel was connected to
81         */
82        void Engine::FreeEngine(LinuxSampler::gig::EngineChannel* pChannel, AudioOutputDevice* pDevice) {
83            dmsg(4,("Disconnecting EngineChannel from gig::Engine.\n"));
84            Engine* pEngine = engines[pDevice];
85            // unregister EngineChannel from the Engine instance
86            pEngine->engineChannels.remove(pChannel);
87            // if the used Engine instance is not used anymore, then destroy it
88            if (pEngine->engineChannels.empty()) {
89                pDevice->Disconnect(pEngine);
90                engines.erase(pDevice);
91                delete pEngine;
92                dmsg(4,("Destroying gig::Engine.\n"));
93            }
94            else dmsg(4,("This gig::Engine has now %d EngineChannels.\n",pEngine->engineChannels.size()));
95        }
96    
97      Engine::Engine() {      Engine::Engine() {
         pRIFF              = NULL;  
         pGig               = NULL;  
         pInstrument        = NULL;  
98          pAudioOutputDevice = NULL;          pAudioOutputDevice = NULL;
99          pDiskThread        = NULL;          pDiskThread        = NULL;
100          pEventGenerator    = NULL;          pEventGenerator    = NULL;
101          pEventQueue        = new RingBuffer<Event>(MAX_EVENTS_PER_FRAGMENT);          pSysexBuffer       = new RingBuffer<uint8_t>(SYSEX_BUFFER_SIZE, 0);
102          pEventPool         = new RTELMemoryPool<Event>(MAX_EVENTS_PER_FRAGMENT);          pEventQueue        = new RingBuffer<Event>(MAX_EVENTS_PER_FRAGMENT, 0);
103          pVoicePool         = new RTELMemoryPool<Voice>(MAX_AUDIO_VOICES);          pEventPool         = new Pool<Event>(MAX_EVENTS_PER_FRAGMENT);
104          pActiveKeys        = new RTELMemoryPool<uint>(128);          pVoicePool         = new Pool<Voice>(MAX_AUDIO_VOICES);        
105          pEvents            = new RTEList<Event>(pEventPool);          pVoiceStealingQueue = new RTList<Event>(pEventPool);
106          pCCEvents          = new RTEList<Event>(pEventPool);          pEvents            = new RTList<Event>(pEventPool);
107            pCCEvents          = new RTList<Event>(pEventPool);
108            
109          for (uint i = 0; i < Event::destination_count; i++) {          for (uint i = 0; i < Event::destination_count; i++) {
110              pSynthesisEvents[i] = new RTEList<Event>(pEventPool);              pSynthesisEvents[i] = new RTList<Event>(pEventPool);
         }  
         for (uint i = 0; i < 128; i++) {  
             pMIDIKeyInfo[i].pActiveVoices  = new RTEList<Voice>(pVoicePool);  
             pMIDIKeyInfo[i].KeyPressed     = false;  
             pMIDIKeyInfo[i].Active         = false;  
             pMIDIKeyInfo[i].ReleaseTrigger = false;  
             pMIDIKeyInfo[i].pSelf          = NULL;  
             pMIDIKeyInfo[i].pEvents        = new RTEList<Event>(pEventPool);  
111          }          }
112          for (Voice* pVoice = pVoicePool->alloc(); pVoice; pVoice = pVoicePool->alloc()) {          for (RTList<Voice>::Iterator iterVoice = pVoicePool->allocAppend(); iterVoice == pVoicePool->last(); iterVoice = pVoicePool->allocAppend()) {
113              pVoice->SetEngine(this);              iterVoice->SetEngine(this);
114          }          }
115          pVoicePool->clear();          pVoicePool->clear();
116    
# Line 63  namespace LinuxSampler { namespace gig { Line 118  namespace LinuxSampler { namespace gig {
118          pBasicFilterParameters  = NULL;          pBasicFilterParameters  = NULL;
119          pMainFilterParameters   = NULL;          pMainFilterParameters   = NULL;
120    
         InstrumentIdx = -1;  
         InstrumentStat = -1;  
   
         AudioDeviceChannelLeft  = -1;  
         AudioDeviceChannelRight = -1;  
   
121          ResetInternal();          ResetInternal();
122      }      }
123    
124      Engine::~Engine() {      Engine::~Engine() {
125          if (pDiskThread) {          if (pDiskThread) {
126                dmsg(1,("Stopping disk thread..."));
127              pDiskThread->StopThread();              pDiskThread->StopThread();
128              delete pDiskThread;              delete pDiskThread;
129          }              dmsg(1,("OK\n"));
         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;  
130          }          }
131          for (uint i = 0; i < Event::destination_count; i++) {          for (uint i = 0; i < Event::destination_count; i++) {
132              if (pSynthesisEvents[i]) delete pSynthesisEvents[i];              if (pSynthesisEvents[i]) delete pSynthesisEvents[i];
133          }          }
         delete[] pSynthesisEvents;  
134          if (pEvents)     delete pEvents;          if (pEvents)     delete pEvents;
135          if (pCCEvents)   delete pCCEvents;          if (pCCEvents)   delete pCCEvents;
136          if (pEventQueue) delete pEventQueue;          if (pEventQueue) delete pEventQueue;
137          if (pEventPool)  delete pEventPool;          if (pEventPool)  delete pEventPool;
138          if (pVoicePool)  delete pVoicePool;          if (pVoicePool) {
139          if (pActiveKeys) delete pActiveKeys;              pVoicePool->clear();
140                delete pVoicePool;
141            }
142          if (pEventGenerator) delete pEventGenerator;          if (pEventGenerator) delete pEventGenerator;
143          if (pMainFilterParameters) delete[] pMainFilterParameters;          if (pMainFilterParameters) delete[] pMainFilterParameters;
144          if (pBasicFilterParameters) delete[] pBasicFilterParameters;          if (pBasicFilterParameters) delete[] pBasicFilterParameters;
145          if (pSynthesisParameters[0]) delete[] pSynthesisParameters[0];          if (pSynthesisParameters[0]) free(pSynthesisParameters[0]);
146            if (pVoiceStealingQueue) delete pVoiceStealingQueue;
147            if (pSysexBuffer) delete pSysexBuffer;
148            EngineFactory::Destroy(this);
149      }      }
150    
151      void Engine::Enable() {      void Engine::Enable() {
# Line 123  namespace LinuxSampler { namespace gig { Line 172  namespace LinuxSampler { namespace gig {
172       */       */
173      void Engine::Reset() {      void Engine::Reset() {
174          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();  
   
175          ResetInternal();          ResetInternal();
   
         // signal audio thread to continue with rendering  
         //SuspensionRequested = false;  
176          Enable();          Enable();
177      }      }
178    
# Line 149  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;
         GlobalVolume        = 1.0;  
186    
187          // set all MIDI controller values to zero          // reset voice stealing parameters
188          memset(ControllerTable, 0x00, 128);          pVoiceStealingQueue->clear();
189    
190          // reset key info          // reset to normal chromatic scale (means equal temper)
191          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].ReleaseTrigger = false;  
             pMIDIKeyInfo[i].pSelf          = NULL;  
         }  
   
         // reset all key groups  
         map<uint,uint*>::iterator iter = ActiveKeyGroups.begin();  
         for (; iter != ActiveKeyGroups.end(); iter++) iter->second = NULL;  
192    
193          // reset all voices          // reset all voices
194          for (Voice* pVoice = pVoicePool->alloc(); pVoice; pVoice = pVoicePool->alloc()) {          for (RTList<Voice>::Iterator iterVoice = pVoicePool->allocAppend(); iterVoice == pVoicePool->last(); iterVoice = pVoicePool->allocAppend()) {
195              pVoice->Reset();              iterVoice->Reset();
196          }          }
197          pVoicePool->clear();          pVoicePool->clear();
198    
         // free all active keys  
         pActiveKeys->clear();  
   
199          // reset disk thread          // reset disk thread
200          if (pDiskThread) pDiskThread->Reset();          if (pDiskThread) pDiskThread->Reset();
201    
202          // delete all input events          // delete all input events
203          pEventQueue->init();          pEventQueue->init();
204      }      }    
   
     /**  
      *  Load an instrument from a .gig file.  
      *  
      *  @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);  
         }  
   
         InstrumentFile = FileName;  
         InstrumentIdx = Instrument;  
         InstrumentStat = 0;  
   
         // delete all key groups  
         ActiveKeyGroups.clear();  
   
         // request gig instrument from instrument manager  
         try {  
             instrument_id_t instrid;  
             instrid.FileName    = FileName;  
             instrid.iInstrument = Instrument;  
             pInstrument = Instruments.Borrow(instrid, this);  
             if (!pInstrument) {  
                 InstrumentStat = -1;  
                 dmsg(1,("no instrument loaded!!!\n"));  
                 exit(EXIT_FAILURE);  
             }  
         }  
         catch (RIFF::Exception e) {  
             InstrumentStat = -2;  
             String msg = "gig::Engine error: Failed to load instrument, cause: " + e.Message;  
             throw LinuxSamplerException(msg);  
         }  
         catch (InstrumentResourceManagerException e) {  
             InstrumentStat = -3;  
             String msg = "gig::Engine error: Failed to load instrument, cause: " + e.Message();  
             throw LinuxSamplerException(msg);  
         }  
         catch (...) {  
             InstrumentStat = -4;  
             throw LinuxSamplerException("gig::Engine error: Failed to load instrument, cause: Unknown exception while trying to parse gig file.");  
         }  
   
         // rebuild ActiveKeyGroups map with key groups of current instrument  
         for (::gig::Region* pRegion = pInstrument->GetFirstRegion(); pRegion; pRegion = pInstrument->GetNextRegion())  
             if (pRegion->KeyGroup) ActiveKeyGroups[pRegion->KeyGroup] = NULL;  
   
         InstrumentStat = 100;  
   
         // 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.  
      */  
     void Engine::ResourceUpdated(::gig::Instrument* pOldResource, ::gig::Instrument* pNewResource, void* pUpdateArg) {  
         this->pInstrument = pNewResource; //TODO: there are couple of engine parameters we should update here as well if the instrument was updated (see LoadInstrument())  
         Enable();  
     }  
205    
206      void Engine::Connect(AudioOutputDevice* pAudioOut) {      void Engine::Connect(AudioOutputDevice* pAudioOut) {
207          pAudioOutputDevice = pAudioOut;          pAudioOutputDevice = pAudioOut;
# Line 294  namespace LinuxSampler { namespace gig { Line 216  namespace LinuxSampler { namespace gig {
216              String msg = "Audio output device unable to provide 2 audio channels, cause: " + e.Message();              String msg = "Audio output device unable to provide 2 audio channels, cause: " + e.Message();
217              throw LinuxSamplerException(msg);              throw LinuxSamplerException(msg);
218          }          }
219            
         this->AudioDeviceChannelLeft  = 0;  
         this->AudioDeviceChannelRight = 1;  
         this->pOutputLeft             = pAudioOutputDevice->Channel(0)->Buffer();  
         this->pOutputRight            = pAudioOutputDevice->Channel(1)->Buffer();  
220          this->MaxSamplesPerCycle      = pAudioOutputDevice->MaxSamplesPerCycle();          this->MaxSamplesPerCycle      = pAudioOutputDevice->MaxSamplesPerCycle();
221          this->SampleRate              = pAudioOutputDevice->SampleRate();          this->SampleRate              = pAudioOutputDevice->SampleRate();
222    
223            // FIXME: audio drivers with varying fragment sizes might be a problem here
224            MaxFadeOutPos = MaxSamplesPerCycle - int(double(SampleRate) * EG_MIN_RELEASE_TIME) - 1;
225            if (MaxFadeOutPos < 0)
226                throw LinuxSamplerException("EG_MIN_RELEASE_TIME in EGADSR.h too big for current audio fragment size / sampling rate!");
227    
228          // (re)create disk thread          // (re)create disk thread
229          if (this->pDiskThread) {          if (this->pDiskThread) {
230                dmsg(1,("Stopping disk thread..."));
231              this->pDiskThread->StopThread();              this->pDiskThread->StopThread();
232              delete this->pDiskThread;              delete this->pDiskThread;
233                dmsg(1,("OK\n"));
234          }          }
235          this->pDiskThread = new DiskThread(((pAudioOut->MaxSamplesPerCycle() << MAX_PITCH) << 1) + 6); //FIXME: assuming stereo          this->pDiskThread = new DiskThread(((pAudioOut->MaxSamplesPerCycle() << MAX_PITCH) << 1) + 6); //FIXME: assuming stereo
236          if (!pDiskThread) {          if (!pDiskThread) {
# Line 313  namespace LinuxSampler { namespace gig { Line 238  namespace LinuxSampler { namespace gig {
238              exit(EXIT_FAILURE);              exit(EXIT_FAILURE);
239          }          }
240    
241          for (Voice* pVoice = pVoicePool->alloc(); pVoice; pVoice = pVoicePool->alloc()) {          for (RTList<Voice>::Iterator iterVoice = pVoicePool->allocAppend(); iterVoice == pVoicePool->last(); iterVoice = pVoicePool->allocAppend()) {
242              pVoice->pDiskThread = this->pDiskThread;              iterVoice->pDiskThread = this->pDiskThread;
243              dmsg(3,("d"));              dmsg(3,("d"));
244          }          }
245          pVoicePool->clear();          pVoicePool->clear();
# Line 324  namespace LinuxSampler { namespace gig { Line 249  namespace LinuxSampler { namespace gig {
249          pEventGenerator = new EventGenerator(pAudioOut->SampleRate());          pEventGenerator = new EventGenerator(pAudioOut->SampleRate());
250    
251          // (re)allocate synthesis parameter matrix          // (re)allocate synthesis parameter matrix
252          if (pSynthesisParameters[0]) delete[] pSynthesisParameters[0];          if (pSynthesisParameters[0]) free(pSynthesisParameters[0]);
253          pSynthesisParameters[0] = new float[Event::destination_count * pAudioOut->MaxSamplesPerCycle()];  
254            #if defined(__APPLE__)
255            pSynthesisParameters[0] = (float *) malloc(Event::destination_count * sizeof(float) * pAudioOut->MaxSamplesPerCycle());
256            #else
257            pSynthesisParameters[0] = (float *) memalign(16,(Event::destination_count * sizeof(float) * pAudioOut->MaxSamplesPerCycle()));
258            #endif
259          for (int dst = 1; dst < Event::destination_count; dst++)          for (int dst = 1; dst < Event::destination_count; dst++)
260              pSynthesisParameters[dst] = pSynthesisParameters[dst - 1] + pAudioOut->MaxSamplesPerCycle();              pSynthesisParameters[dst] = pSynthesisParameters[dst - 1] + pAudioOut->MaxSamplesPerCycle();
261    
# Line 339  namespace LinuxSampler { namespace gig { Line 269  namespace LinuxSampler { namespace gig {
269          pDiskThread->StartThread();          pDiskThread->StartThread();
270          dmsg(1,("OK\n"));          dmsg(1,("OK\n"));
271    
272          for (Voice* pVoice = pVoicePool->first(); pVoice; pVoice = pVoicePool->next()) {          for (RTList<Voice>::Iterator iterVoice = pVoicePool->allocAppend(); iterVoice == pVoicePool->last(); iterVoice = pVoicePool->allocAppend()) {
273              if (!pVoice->pDiskThread) {              if (!iterVoice->pDiskThread) {
274                  dmsg(0,("Engine -> voice::trigger: !pDiskThread\n"));                  dmsg(0,("Engine -> voice::trigger: !pDiskThread\n"));
275                  exit(EXIT_FAILURE);                  exit(EXIT_FAILURE);
276              }              }
277          }          }
278      }      }
279    
280      void Engine::DisconnectAudioOutputDevice() {      void Engine::ClearEventLists() {
281          if (pAudioOutputDevice) { // if clause to prevent disconnect loops          pEvents->clear();
282              AudioOutputDevice* olddevice = pAudioOutputDevice;          pCCEvents->clear();
283              pAudioOutputDevice = NULL;          for (uint i = 0; i < Event::destination_count; i++) {
284              olddevice->Disconnect(this);              pSynthesisEvents[i]->clear();
             AudioDeviceChannelLeft  = -1;  
             AudioDeviceChannelRight = -1;  
285          }          }
286      }      }
287    
288      /**      /**
289         * Copy all events from the given input queue buffer to the engine's
290         * internal event list. This will be done at the beginning of each audio
291         * cycle (that is each RenderAudio() call) to get all events which have
292         * to be processed in the current audio cycle. Each EngineChannel has
293         * it's own input event queue for the common channel specific events
294         * (like NoteOn, NoteOff and ControlChange events). Beside that, the
295         * engine also has a input event queue for global events (usually SysEx
296         * message).
297         *
298         * @param pEventQueue - input event buffer to read from
299         * @param Samples     - number of sample points to be processed in the
300         *                      current audio cycle
301         */
302        void Engine::ImportEvents(RingBuffer<Event>* pEventQueue, uint Samples) {
303            RingBuffer<Event>::NonVolatileReader eventQueueReader = pEventQueue->get_non_volatile_reader();
304            Event* pEvent;
305            while (true) {
306                // get next event from input event queue
307                if (!(pEvent = eventQueueReader.pop())) break;
308                // if younger event reached, ignore that and all subsequent ones for now
309                if (pEvent->FragmentPos() >= Samples) {
310                    eventQueueReader--;
311                    dmsg(2,("Younger Event, pos=%d ,Samples=%d!\n",pEvent->FragmentPos(),Samples));
312                    pEvent->ResetFragmentPos();
313                    break;
314                }
315                // copy event to internal event list
316                if (pEvents->poolIsEmpty()) {
317                    dmsg(1,("Event pool emtpy!\n"));
318                    break;
319                }
320                *pEvents->allocAppend() = *pEvent;
321            }
322            eventQueueReader.free(); // free all copied events from input queue
323        }    
324    
325        /**
326       *  Let this engine proceed to render the given amount of sample points. The       *  Let this engine proceed to render the given amount of sample points. The
327       *  calculated audio data of all voices of this engine will be placed into       *  calculated audio data of all voices of this engine will be placed into
328       *  the engine's audio sum buffer which has to be copied and eventually be       *  the engine's audio sum buffer which has to be copied and eventually be
# Line 370  namespace LinuxSampler { namespace gig { Line 335  namespace LinuxSampler { namespace gig {
335      int Engine::RenderAudio(uint Samples) {      int Engine::RenderAudio(uint Samples) {
336          dmsg(5,("RenderAudio(Samples=%d)\n", Samples));          dmsg(5,("RenderAudio(Samples=%d)\n", Samples));
337    
338          // return if no instrument loaded or engine disabled          // return if engine disabled
339          if (EngineDisabled.Pop()) {          if (EngineDisabled.Pop()) {
340              dmsg(5,("gig::Engine: engine disabled (val=%d)\n",EngineDisabled.GetUnsafe()));              dmsg(5,("gig::Engine: engine disabled (val=%d)\n",EngineDisabled.GetUnsafe()));
341              return 0;              return 0;
342          }          }
343          if (!pInstrument) {  
344              dmsg(5,("gig::Engine: no instrument loaded\n"));          // update time of start and end of this audio fragment (as events' time stamps relate to this)
345              return 0;          pEventGenerator->UpdateFragmentTime(Samples);
346    
347            // empty the engine's event lists for the new fragment
348            ClearEventLists();
349    
350            // get all events from the engine's global input event queue which belong to the current fragment
351            // (these are usually just SysEx messages)
352            ImportEvents(this->pEventQueue, Samples);
353    
354            // process engine global events (these are currently only MIDI System Exclusive messages)
355            {
356                RTList<Event>::Iterator itEvent = pEvents->first();
357                RTList<Event>::Iterator end     = pEvents->end();
358                for (; itEvent != end; ++itEvent) {
359                    switch (itEvent->Type) {
360                        case Event::type_sysex:
361                            dmsg(5,("Engine: Sysex received\n"));
362                            ProcessSysex(itEvent);
363                            break;
364                    }
365                }
366          }          }
367    
368            // reset internal voice counter (just for statistic of active voices)
369            ActiveVoiceCountTemp = 0;
370    
371          // empty the event lists for the new fragment          // render audio for all engine channels
372          pEvents->clear();          // TODO: should we make voice stealing engine globally? unfortunately this would mean other disadvantages so I left voice stealing in the engine channel space for now
373          pCCEvents->clear();          {
374          for (uint i = 0; i < Event::destination_count; i++) {              std::list<EngineChannel*>::iterator itChannel = engineChannels.begin();
375              pSynthesisEvents[i]->clear();              std::list<EngineChannel*>::iterator end       = engineChannels.end();
376                for (; itChannel != end; itChannel++) {
377                    if (!(*itChannel)->pInstrument) continue; // ignore if no instrument loaded
378                    RenderAudio(*itChannel, Samples);
379                }
380          }          }
381    
382          // read and copy events from input queue          // just some statistics about this engine instance
383          Event event = pEventGenerator->CreateEvent();          ActiveVoiceCount = ActiveVoiceCountTemp;
384          while (true) {          if (ActiveVoiceCount > ActiveVoiceCountMax) ActiveVoiceCountMax = ActiveVoiceCount;
385              if (!pEventQueue->pop(&event)) break;  
386              pEvents->alloc_assign(event);          return 0;
387        }
388    
389        void Engine::RenderAudio(EngineChannel* pEngineChannel, uint Samples) {
390            // empty the engine's event lists for the new fragment
391            ClearEventLists();
392            // empty the engine channel's, MIDI key specific event lists
393            {
394                RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();
395                RTList<uint>::Iterator end    = pEngineChannel->pActiveKeys->end();
396                for(; iuiKey != end; ++iuiKey) {
397                    pEngineChannel->pMIDIKeyInfo[*iuiKey].pEvents->clear(); // free all events on the key
398                }
399          }          }
400    
401    
402          // update time of start and end of this audio fragment (as events' time stamps relate to this)          // get all events from the engine channels's input event queue which belong to the current fragment
403          pEventGenerator->UpdateFragmentTime(Samples);          // (these are the common events like NoteOn, NoteOff, ControlChange, etc.)
404            ImportEvents(pEngineChannel->pEventQueue, Samples);      
405    
406    
407          // process events          // process events
408          Event* pNextEvent = pEvents->first();          {
409          while (pNextEvent) {              RTList<Event>::Iterator itEvent = pEvents->first();
410              Event* pEvent = pNextEvent;              RTList<Event>::Iterator end     = pEvents->end();
411              pEvents->set_current(pEvent);              for (; itEvent != end; ++itEvent) {
412              pNextEvent = pEvents->next();                  switch (itEvent->Type) {
413              switch (pEvent->Type) {                      case Event::type_note_on:
414                  case Event::type_note_on:                          dmsg(5,("Engine: Note on received\n"));
415                      dmsg(5,("Audio Thread: Note on received\n"));                          ProcessNoteOn((EngineChannel*)itEvent->pEngineChannel, itEvent);
416                      ProcessNoteOn(pEvent);                          break;
417                      break;                      case Event::type_note_off:
418                  case Event::type_note_off:                          dmsg(5,("Engine: Note off received\n"));
419                      dmsg(5,("Audio Thread: Note off received\n"));                          ProcessNoteOff((EngineChannel*)itEvent->pEngineChannel, itEvent);
420                      ProcessNoteOff(pEvent);                          break;
421                      break;                      case Event::type_control_change:
422                  case Event::type_control_change:                          dmsg(5,("Engine: MIDI CC received\n"));
423                      dmsg(5,("Audio Thread: MIDI CC received\n"));                          ProcessControlChange((EngineChannel*)itEvent->pEngineChannel, itEvent);
424                      ProcessControlChange(pEvent);                          break;
425                      break;                      case Event::type_pitchbend:
426                  case Event::type_pitchbend:                          dmsg(5,("Engine: Pitchbend received\n"));
427                      dmsg(5,("Audio Thread: Pitchbend received\n"));                          ProcessPitchbend((EngineChannel*)itEvent->pEngineChannel, itEvent);
428                      ProcessPitchbend(pEvent);                          break;
429                      break;                  }
430              }              }
431          }          }
432    
433    
434          // render audio from all active voices          // render audio from all active voices
435          int active_voices = 0;          {
436          uint* piKey = pActiveKeys->first();              RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();
437          while (piKey) { // iterate through all active keys              RTList<uint>::Iterator end    = pEngineChannel->pActiveKeys->end();
438              midi_key_info_t* pKey = &pMIDIKeyInfo[*piKey];              while (iuiKey != end) { // iterate through all active keys
439              pActiveKeys->set_current(piKey);                  midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];
440              piKey = pActiveKeys->next();                  ++iuiKey;
441    
442              Voice* pVoiceNext = pKey->pActiveVoices->first();                  RTList<Voice>::Iterator itVoice     = pKey->pActiveVoices->first();
443              while (pVoiceNext) { // iterate through all voices on this key                  RTList<Voice>::Iterator itVoicesEnd = pKey->pActiveVoices->end();
444                  // already get next voice on key                  for (; itVoice != itVoicesEnd; ++itVoice) { // iterate through all voices on this key
445                  Voice* pVoice = pVoiceNext;                      // now render current voice
446                  pKey->pActiveVoices->set_current(pVoice);                      itVoice->Render(Samples);
447                  pVoiceNext = pKey->pActiveVoices->next();                      if (itVoice->IsActive()) ActiveVoiceCountTemp++; // still active
448                        else { // voice reached end, is now inactive
449                  // now render current voice                          FreeVoice(pEngineChannel, itVoice); // remove voice from the list of active voices
450                  pVoice->Render(Samples);                      }
451                  if (pVoice->IsActive()) active_voices++; // still active                  }
452                  else { // voice reached end, is now inactive              }
                     KillVoiceImmediately(pVoice); // remove voice from the list of active voices  
                 }  
             }  
             pKey->pEvents->clear(); // free all events on the key  
453          }          }
454    
455            
456          // write that to the disk thread class so that it can print it          // now render all postponed voices from voice stealing
457          // on the console for debugging purposes          {
458          ActiveVoiceCount = active_voices;              RTList<Event>::Iterator itVoiceStealEvent = pVoiceStealingQueue->first();
459          if (ActiveVoiceCount > ActiveVoiceCountMax) ActiveVoiceCountMax = ActiveVoiceCount;              RTList<Event>::Iterator end               = pVoiceStealingQueue->end();
460                for (; itVoiceStealEvent != end; ++itVoiceStealEvent) {
461                    Pool<Voice>::Iterator itNewVoice =
462          return 0;                      LaunchVoice(pEngineChannel, itVoiceStealEvent, itVoiceStealEvent->Param.Note.Layer, itVoiceStealEvent->Param.Note.ReleaseTrigger, false);
463      }                  if (itNewVoice) {
464                        for (; itNewVoice; itNewVoice = itNewVoice->itChildVoice) {
465      /**                          itNewVoice->Render(Samples);
466       *  Will be called by the MIDIIn Thread to let the audio thread trigger a new                          if (itNewVoice->IsActive()) ActiveVoiceCountTemp++; // still active
467       *  voice for the given key.                          else { // voice reached end, is now inactive
468       *                              FreeVoice(pEngineChannel, itNewVoice); // remove voice from the list of active voices
469       *  @param Key      - MIDI key number of the triggered key                          }
470       *  @param Velocity - MIDI velocity value of the triggered key                      }
471       */                  }
472      void Engine::SendNoteOn(uint8_t Key, uint8_t Velocity) {                  else dmsg(1,("gig::Engine: ERROR, voice stealing didn't work out!\n"));
473          Event event    = pEventGenerator->CreateEvent();              }
474          event.Type     = Event::type_note_on;          }
475          event.Key      = Key;          // reset voice stealing for the new fragment
476          event.Velocity = Velocity;          pVoiceStealingQueue->clear();
477          if (this->pEventQueue->write_space() > 0) this->pEventQueue->push(&event);          pEngineChannel->itLastStolenVoice = RTList<Voice>::Iterator();
478          else dmsg(1,("Engine: Input event queue full!"));          pEngineChannel->iuiLastStolenKey  = RTList<uint>::Iterator();
479      }          
480    
481      /**          // free all keys which have no active voices left
482       *  Will be called by the MIDIIn Thread to signal the audio thread to release          {
483       *  voice(s) on the given key.              RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();
484       *              RTList<uint>::Iterator end    = pEngineChannel->pActiveKeys->end();
485       *  @param Key      - MIDI key number of the released key              while (iuiKey != end) { // iterate through all active keys
486       *  @param Velocity - MIDI release velocity value of the released key                  midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];
487       */                  ++iuiKey;
488      void Engine::SendNoteOff(uint8_t Key, uint8_t Velocity) {                  if (pKey->pActiveVoices->isEmpty()) FreeKey(pEngineChannel, pKey);
489          Event event    = pEventGenerator->CreateEvent();                  #if DEVMODE
490          event.Type     = Event::type_note_off;                  else { // FIXME: should be removed before the final release (purpose: just a sanity check for debugging)
491          event.Key      = Key;                      RTList<Voice>::Iterator itVoice     = pKey->pActiveVoices->first();
492          event.Velocity = Velocity;                      RTList<Voice>::Iterator itVoicesEnd = pKey->pActiveVoices->end();
493          if (this->pEventQueue->write_space() > 0) this->pEventQueue->push(&event);                      for (; itVoice != itVoicesEnd; ++itVoice) { // iterate through all voices on this key
494          else dmsg(1,("Engine: Input event queue full!"));                          if (itVoice->itKillEvent) {
495                                dmsg(1,("gig::Engine: ERROR, killed voice survived !!!\n"));
496                            }
497                        }
498                    }
499                    #endif // DEVMODE
500                }
501            }
502      }      }
503    
504      /**      /**
505       *  Will be called by the MIDIIn Thread to signal the audio thread to change       *  Will be called by the MIDI input device whenever a MIDI system
506       *  the pitch value for all voices.       *  exclusive message has arrived.
507       *       *
508       *  @param Pitch - MIDI pitch value (-8192 ... +8191)       *  @param pData - pointer to sysex data
509         *  @param Size  - lenght of sysex data (in bytes)
510       */       */
511      void Engine::SendPitchbend(int Pitch) {      void Engine::SendSysex(void* pData, uint Size) {
512          Event event = pEventGenerator->CreateEvent();          Event event             = pEventGenerator->CreateEvent();
513          event.Type  = Event::type_pitchbend;          event.Type              = Event::type_sysex;
514          event.Pitch = Pitch;          event.Param.Sysex.Size  = Size;
515          if (this->pEventQueue->write_space() > 0) this->pEventQueue->push(&event);          event.pEngineChannel    = NULL; // as Engine global event
516          else dmsg(1,("Engine: Input event queue full!"));          if (pEventQueue->write_space() > 0) {
517      }              if (pSysexBuffer->write_space() >= Size) {
518                    // copy sysex data to input buffer
519                    uint toWrite = Size;
520                    uint8_t* pPos = (uint8_t*) pData;
521                    while (toWrite) {
522                        const uint writeNow = RTMath::Min(toWrite, pSysexBuffer->write_space_to_end());
523                        pSysexBuffer->write(pPos, writeNow);
524                        toWrite -= writeNow;
525                        pPos    += writeNow;
526    
527      /**                  }
528       *  Will be called by the MIDIIn Thread to signal the audio thread that a                  // finally place sysex event into input event queue
529       *  continuous controller value has changed.                  pEventQueue->push(&event);
530       *              }
531       *  @param Controller - MIDI controller number of the occured control change              else dmsg(1,("Engine: Sysex message too large (%d byte) for input buffer (%d byte)!",Size,SYSEX_BUFFER_SIZE));
532       *  @param Value      - value of the control change          }
      */  
     void Engine::SendControlChange(uint8_t Controller, uint8_t Value) {  
         Event event      = pEventGenerator->CreateEvent();  
         event.Type       = Event::type_control_change;  
         event.Controller = Controller;  
         event.Value      = Value;  
         if (this->pEventQueue->write_space() > 0) this->pEventQueue->push(&event);  
533          else dmsg(1,("Engine: Input event queue full!"));          else dmsg(1,("Engine: Input event queue full!"));
534      }      }
535    
536      /**      /**
537       *  Assigns and triggers a new voice for the respective MIDI key.       *  Assigns and triggers a new voice for the respective MIDI key.
538       *       *
539       *  @param pNoteOnEvent - key, velocity and time stamp of the event       *  @param pEngineChannel - engine channel on which this event occured on
540         *  @param itNoteOnEvent - key, velocity and time stamp of the event
541       */       */
542      void Engine::ProcessNoteOn(Event* pNoteOnEvent) {      void Engine::ProcessNoteOn(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOnEvent) {
543          midi_key_info_t* pKey = &pMIDIKeyInfo[pNoteOnEvent->Key];          
544            const int key = itNoteOnEvent->Param.Note.Key;
545    
546            // Change key dimension value if key is in keyswitching area
547            {
548                const ::gig::Instrument* pInstrument = pEngineChannel->pInstrument;
549                if (key >= pInstrument->DimensionKeyRange.low && key <= pInstrument->DimensionKeyRange.high)
550                    pEngineChannel->CurrentKeyDimension = ((key - pInstrument->DimensionKeyRange.low) * 128) /
551                        (pInstrument->DimensionKeyRange.high - pInstrument->DimensionKeyRange.low + 1);
552            }
553    
554            midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[key];
555    
556          pKey->KeyPressed = true; // the MIDI key was now pressed down          pKey->KeyPressed = true; // the MIDI key was now pressed down
557    
558          // cancel release process of voices on this key if needed          // cancel release process of voices on this key if needed
559          if (pKey->Active && !SustainPedal) {          if (pKey->Active && !pEngineChannel->SustainPedal) {
560              Event* pCancelReleaseEvent = pKey->pEvents->alloc();              RTList<Event>::Iterator itCancelReleaseEvent = pKey->pEvents->allocAppend();
561              if (pCancelReleaseEvent) {              if (itCancelReleaseEvent) {
562                  *pCancelReleaseEvent = *pNoteOnEvent;                  *itCancelReleaseEvent = *itNoteOnEvent;                  // copy event
563                  pCancelReleaseEvent->Type = Event::type_cancel_release; // transform event type                  itCancelReleaseEvent->Type = Event::type_cancel_release; // transform event type
564              }              }
565              else dmsg(1,("Event pool emtpy!\n"));              else dmsg(1,("Event pool emtpy!\n"));
566          }          }
567    
568          // allocate and trigger a new voice for the key          // move note on event to the key's own event list
569          LaunchVoice(pNoteOnEvent);          RTList<Event>::Iterator itNoteOnEventOnKeyList = itNoteOnEvent.moveToEndOf(pKey->pEvents);
570    
571          // finally move note on event to the key's own event list          // allocate and trigger a new voice for the key
572          pEvents->move(pNoteOnEvent, pKey->pEvents);          LaunchVoice(pEngineChannel, itNoteOnEventOnKeyList, 0, false, true);
573      }      }
574    
575      /**      /**
# Line 557  namespace LinuxSampler { namespace gig { Line 578  namespace LinuxSampler { namespace gig {
578       *  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.
579       *  due to completion of sample playback).       *  due to completion of sample playback).
580       *       *
581       *  @param pNoteOffEvent - key, velocity and time stamp of the event       *  @param pEngineChannel - engine channel on which this event occured on
582         *  @param itNoteOffEvent - key, velocity and time stamp of the event
583       */       */
584      void Engine::ProcessNoteOff(Event* pNoteOffEvent) {      void Engine::ProcessNoteOff(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOffEvent) {
585          midi_key_info_t* pKey = &pMIDIKeyInfo[pNoteOffEvent->Key];          midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[itNoteOffEvent->Param.Note.Key];
586    
587          pKey->KeyPressed = false; // the MIDI key was now released          pKey->KeyPressed = false; // the MIDI key was now released
588    
589          // release voices on this key if needed          // release voices on this key if needed
590          if (pKey->Active && !SustainPedal) {          if (pKey->Active && !pEngineChannel->SustainPedal) {
591              pNoteOffEvent->Type = Event::type_release; // transform event type              itNoteOffEvent->Type = Event::type_release; // transform event type
592          }          }
593    
594            // move event to the key's own event list
595            RTList<Event>::Iterator itNoteOffEventOnKeyList = itNoteOffEvent.moveToEndOf(pKey->pEvents);
596    
597          // spawn release triggered voice(s) if needed          // spawn release triggered voice(s) if needed
598          if (pKey->ReleaseTrigger) {          if (pKey->ReleaseTrigger) {
599              LaunchVoice(pNoteOffEvent, 0, true);              LaunchVoice(pEngineChannel, itNoteOffEventOnKeyList, 0, true, false); //FIXME: for the moment we don't perform voice stealing for release triggered samples
600              pKey->ReleaseTrigger = false;              pKey->ReleaseTrigger = false;
601          }          }
   
         // move event to the key's own event list  
         pEvents->move(pNoteOffEvent, pKey->pEvents);  
602      }      }
603    
604      /**      /**
605       *  Moves pitchbend event from the general (input) event list to the pitch       *  Moves pitchbend event from the general (input) event list to the pitch
606       *  event list.       *  event list.
607       *       *
608       *  @param pPitchbendEvent - absolute pitch value and time stamp of the event       *  @param pEngineChannel - engine channel on which this event occured on
609         *  @param itPitchbendEvent - absolute pitch value and time stamp of the event
610       */       */
611      void Engine::ProcessPitchbend(Event* pPitchbendEvent) {      void Engine::ProcessPitchbend(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itPitchbendEvent) {
612          this->Pitch = pPitchbendEvent->Pitch; // store current pitch value          pEngineChannel->Pitch = itPitchbendEvent->Param.Pitch.Pitch; // store current pitch value
613          pEvents->move(pPitchbendEvent, pSynthesisEvents[Event::destination_vco]);          itPitchbendEvent.moveToEndOf(pSynthesisEvents[Event::destination_vco]);
614      }      }
615    
616      /**      /**
# Line 595  namespace LinuxSampler { namespace gig { Line 618  namespace LinuxSampler { namespace gig {
618       *  called by the ProcessNoteOn() method and by the voices itself       *  called by the ProcessNoteOn() method and by the voices itself
619       *  (e.g. to spawn further voices on the same key for layered sounds).       *  (e.g. to spawn further voices on the same key for layered sounds).
620       *       *
621       *  @param pNoteOnEvent        - key, velocity and time stamp of the event       *  @param pEngineChannel      - engine channel on which this event occured on
622         *  @param itNoteOnEvent       - key, velocity and time stamp of the event
623       *  @param iLayer              - layer index for the new voice (optional - only       *  @param iLayer              - layer index for the new voice (optional - only
624       *                               in case of layered sounds of course)       *                               in case of layered sounds of course)
625       *  @param ReleaseTriggerVoice - if new voice is a release triggered voice       *  @param ReleaseTriggerVoice - if new voice is a release triggered voice
626       *                               (optional, default = false)       *                               (optional, default = false)
627         *  @param VoiceStealing       - if voice stealing should be performed
628         *                               when there is no free voice
629         *                               (optional, default = true)
630         *  @returns pointer to new voice or NULL if there was no free voice or
631         *           if the voice wasn't triggered (for example when no region is
632         *           defined for the given key).
633       */       */
634      void Engine::LaunchVoice(Event* pNoteOnEvent, int iLayer, bool ReleaseTriggerVoice) {      Pool<Voice>::Iterator Engine::LaunchVoice(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOnEvent, int iLayer, bool ReleaseTriggerVoice, bool VoiceStealing) {
635          midi_key_info_t* pKey = &pMIDIKeyInfo[pNoteOnEvent->Key];          midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[itNoteOnEvent->Param.Note.Key];
636    
637          // allocate a new voice for the key          // allocate a new voice for the key
638          Voice* pNewVoice = pKey->pActiveVoices->alloc();          Pool<Voice>::Iterator itNewVoice = pKey->pActiveVoices->allocAppend();
639          if (pNewVoice) {          if (itNewVoice) {
640              // launch the new voice              // launch the new voice
641              if (pNewVoice->Trigger(pNoteOnEvent, this->Pitch, this->pInstrument, iLayer, ReleaseTriggerVoice) < 0) {              if (itNewVoice->Trigger(pEngineChannel, itNoteOnEvent, pEngineChannel->Pitch, pEngineChannel->pInstrument, iLayer, ReleaseTriggerVoice, VoiceStealing) < 0) {
642                  dmsg(1,("Triggering new voice failed!\n"));                  dmsg(4,("Voice not triggered\n"));
643                  pKey->pActiveVoices->free(pNewVoice);                  pKey->pActiveVoices->free(itNewVoice);
644              }              }
645              else { // on success              else { // on success
646                  uint** ppKeyGroup = NULL;                  uint** ppKeyGroup = NULL;
647                  if (pNewVoice->KeyGroup) { // if this voice / key belongs to a key group                  if (itNewVoice->KeyGroup) { // if this voice / key belongs to a key group
648                      ppKeyGroup = &ActiveKeyGroups[pNewVoice->KeyGroup];                      ppKeyGroup = &pEngineChannel->ActiveKeyGroups[itNewVoice->KeyGroup];
649                      if (*ppKeyGroup) { // if there's already an active key in that key group                      if (*ppKeyGroup) { // if there's already an active key in that key group
650                          midi_key_info_t* pOtherKey = &pMIDIKeyInfo[**ppKeyGroup];                          midi_key_info_t* pOtherKey = &pEngineChannel->pMIDIKeyInfo[**ppKeyGroup];
651                          // kill all voices on the (other) key                          // kill all voices on the (other) key
652                          Voice* pVoiceToBeKilled = pOtherKey->pActiveVoices->first();                          RTList<Voice>::Iterator itVoiceToBeKilled = pOtherKey->pActiveVoices->first();
653                          while (pVoiceToBeKilled) {                          RTList<Voice>::Iterator end               = pOtherKey->pActiveVoices->end();
654                              Voice* pVoiceToBeKilledNext = pOtherKey->pActiveVoices->next();                          for (; itVoiceToBeKilled != end; ++itVoiceToBeKilled) {
655                              if (pVoiceToBeKilled->Type != Voice::type_release_trigger) pVoiceToBeKilled->Kill(pNoteOnEvent);                              if (itVoiceToBeKilled->Type != Voice::type_release_trigger) itVoiceToBeKilled->Kill(itNoteOnEvent);
                             pOtherKey->pActiveVoices->set_current(pVoiceToBeKilled);  
                             pVoiceToBeKilled = pVoiceToBeKilledNext;  
656                          }                          }
657                      }                      }
658                  }                  }
659                  if (!pKey->Active) { // mark as active key                  if (!pKey->Active) { // mark as active key
660                      pKey->Active = true;                      pKey->Active = true;
661                      pKey->pSelf  = pActiveKeys->alloc();                      pKey->itSelf = pEngineChannel->pActiveKeys->allocAppend();
662                      *pKey->pSelf = pNoteOnEvent->Key;                      *pKey->itSelf = itNoteOnEvent->Param.Note.Key;
663                  }                  }
664                  if (pNewVoice->KeyGroup) {                  if (itNewVoice->KeyGroup) {
665                      *ppKeyGroup = pKey->pSelf; // put key as the (new) active key to its key group                      *ppKeyGroup = &*pKey->itSelf; // put key as the (new) active key to its key group
666                  }                  }
667                  if (pNewVoice->Type == Voice::type_release_trigger_required) pKey->ReleaseTrigger = true; // mark key for the need of release triggered voice(s)                  if (itNewVoice->Type == Voice::type_release_trigger_required) pKey->ReleaseTrigger = true; // mark key for the need of release triggered voice(s)
668                    return itNewVoice; // success
669              }              }
670          }          }
671          else std::cerr << "No free voice!" << std::endl << std::flush;          else if (VoiceStealing) {
672                // first, get total amount of required voices (dependant on amount of layers)
673                ::gig::Region* pRegion = pEngineChannel->pInstrument->GetRegion(itNoteOnEvent->Param.Note.Key);
674                if (!pRegion) return Pool<Voice>::Iterator(); // nothing defined for this MIDI key, so no voice needed
675                int voicesRequired = pRegion->Layers;
676    
677                // now steal the (remaining) amount of voices
678                for (int i = iLayer; i < voicesRequired; i++)
679                    StealVoice(pEngineChannel, itNoteOnEvent);
680    
681                // put note-on event into voice-stealing queue, so it will be reprocessed after killed voice died
682                RTList<Event>::Iterator itStealEvent = pVoiceStealingQueue->allocAppend();
683                if (itStealEvent) {
684                    *itStealEvent = *itNoteOnEvent; // copy event
685                    itStealEvent->Param.Note.Layer = iLayer;
686                    itStealEvent->Param.Note.ReleaseTrigger = ReleaseTriggerVoice;
687                }
688                else dmsg(1,("Voice stealing queue full!\n"));
689            }
690    
691            return Pool<Voice>::Iterator(); // no free voice or error
692      }      }
693    
694      /**      /**
695       *  Immediately kills the voice given with pVoice (no matter if sustain is       *  Will be called by LaunchVoice() method in case there are no free
696       *  pressed or not) and removes it from the MIDI key's list of active voice.       *  voices left. This method will select and kill one old voice for
697       *  This method will e.g. be called if a voice went inactive by itself.       *  voice stealing and postpone the note-on event until the selected
698         *  voice actually died.
699       *       *
700       *  @param pVoice - points to the voice to be killed       *  @param pEngineChannel - engine channel on which this event occured on
701         *  @param itNoteOnEvent - key, velocity and time stamp of the event
702       */       */
703      void Engine::KillVoiceImmediately(Voice* pVoice) {      void Engine::StealVoice(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOnEvent) {
704          if (pVoice) {          if (!pEventPool->poolIsEmpty()) {
705              if (pVoice->IsActive()) pVoice->KillImmediately();  
706                RTList<uint>::Iterator  iuiOldestKey;
707                RTList<Voice>::Iterator itOldestVoice;
708    
709                // Select one voice for voice stealing
710                switch (VOICE_STEAL_ALGORITHM) {
711    
712                    // try to pick the oldest voice on the key where the new
713                    // voice should be spawned, if there is no voice on that
714                    // key, or no voice left to kill there, then procceed with
715                    // 'oldestkey' algorithm
716                    case voice_steal_algo_keymask: {
717                        midi_key_info_t* pOldestKey = &pEngineChannel->pMIDIKeyInfo[itNoteOnEvent->Param.Note.Key];
718                        if (pEngineChannel->itLastStolenVoice) {
719                            itOldestVoice = pEngineChannel->itLastStolenVoice;
720                            ++itOldestVoice;
721                        }
722                        else { // no voice stolen in this audio fragment cycle yet
723                            itOldestVoice = pOldestKey->pActiveVoices->first();
724                        }
725                        if (itOldestVoice) {
726                            iuiOldestKey = pOldestKey->itSelf;
727                            break; // selection succeeded
728                        }
729                    } // no break - intentional !
730    
731                    // try to pick the oldest voice on the oldest active key
732                    // (caution: must stay after 'keymask' algorithm !)
733                    case voice_steal_algo_oldestkey: {
734                        if (pEngineChannel->itLastStolenVoice) {
735                            midi_key_info_t* pOldestKey = &pEngineChannel->pMIDIKeyInfo[*pEngineChannel->iuiLastStolenKey];
736                            itOldestVoice = pEngineChannel->itLastStolenVoice;
737                            ++itOldestVoice;
738                            if (!itOldestVoice) {
739                                iuiOldestKey = pEngineChannel->iuiLastStolenKey;
740                                ++iuiOldestKey;
741                                if (iuiOldestKey) {
742                                    midi_key_info_t* pOldestKey = &pEngineChannel->pMIDIKeyInfo[*iuiOldestKey];
743                                    itOldestVoice = pOldestKey->pActiveVoices->first();
744                                }
745                                else {
746                                    dmsg(1,("gig::Engine: Warning, too less voices, even for voice stealing! - Better recompile with higher MAX_AUDIO_VOICES.\n"));
747                                    return;
748                                }
749                            }
750                            else iuiOldestKey = pEngineChannel->iuiLastStolenKey;
751                        }
752                        else { // no voice stolen in this audio fragment cycle yet
753                            iuiOldestKey = pEngineChannel->pActiveKeys->first();
754                            midi_key_info_t* pOldestKey = &pEngineChannel->pMIDIKeyInfo[*iuiOldestKey];
755                            itOldestVoice = pOldestKey->pActiveVoices->first();
756                        }
757                        break;
758                    }
759    
760              midi_key_info_t* pKey = &pMIDIKeyInfo[pVoice->MIDIKey];                  // don't steal anything
761                    case voice_steal_algo_none:
762                    default: {
763                        dmsg(1,("No free voice (voice stealing disabled)!\n"));
764                        return;
765                    }
766                }
767    
768                //FIXME: can be removed, just a sanity check for debugging
769                if (!itOldestVoice->IsActive()) dmsg(1,("gig::Engine: ERROR, tried to steal a voice which was not active !!!\n"));
770    
771                // now kill the selected voice
772                itOldestVoice->Kill(itNoteOnEvent);
773                // remember which voice on which key we stole, so we can simply proceed for the next voice stealing
774                pEngineChannel->itLastStolenVoice = itOldestVoice;
775                pEngineChannel->iuiLastStolenKey = iuiOldestKey;
776            }
777            else dmsg(1,("Event pool emtpy!\n"));
778        }
779    
780        /**
781         *  Removes the given voice from the MIDI key's list of active voices.
782         *  This method will be called when a voice went inactive, e.g. because
783         *  it finished to playback its sample, finished its release stage or
784         *  just was killed.
785         *
786         *  @param pEngineChannel - engine channel on which this event occured on
787         *  @param itVoice - points to the voice to be freed
788         */
789        void Engine::FreeVoice(EngineChannel* pEngineChannel, Pool<Voice>::Iterator& itVoice) {
790            if (itVoice) {
791                midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[itVoice->MIDIKey];
792    
793                uint keygroup = itVoice->KeyGroup;
794    
795              // free the voice object              // free the voice object
796              pVoicePool->free(pVoice);              pVoicePool->free(itVoice);
797    
798              // 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
799              if (pKey->pActiveVoices->is_empty()) {              if (pKey->pActiveVoices->isEmpty() && keygroup) {
800                  if (pVoice->KeyGroup) { // if voice / key belongs to a key group                  uint** ppKeyGroup = &pEngineChannel->ActiveKeyGroups[keygroup];
801                      uint** ppKeyGroup = &ActiveKeyGroups[pVoice->KeyGroup];                  if (*ppKeyGroup == &*pKey->itSelf) *ppKeyGroup = NULL; // remove key from key group
                     if (*ppKeyGroup == pKey->pSelf) *ppKeyGroup = NULL; // remove key from key group  
                 }  
                 pKey->Active = false;  
                 pActiveKeys->free(pKey->pSelf); // remove key from list of active keys  
                 pKey->pSelf = NULL;  
                 pKey->ReleaseTrigger = false;  
                 dmsg(3,("Key has no more voices now\n"));  
802              }              }
803          }          }
804          else std::cerr << "Couldn't release voice! (pVoice == NULL)\n" << std::flush;          else std::cerr << "Couldn't release voice! (!itVoice)\n" << std::flush;
805        }
806    
807        /**
808         *  Called when there's no more voice left on a key, this call will
809         *  update the key info respectively.
810         *
811         *  @param pEngineChannel - engine channel on which this event occured on
812         *  @param pKey - key which is now inactive
813         */
814        void Engine::FreeKey(EngineChannel* pEngineChannel, midi_key_info_t* pKey) {
815            if (pKey->pActiveVoices->isEmpty()) {
816                pKey->Active = false;
817                pEngineChannel->pActiveKeys->free(pKey->itSelf); // remove key from list of active keys
818                pKey->itSelf = RTList<uint>::Iterator();
819                pKey->ReleaseTrigger = false;
820                pKey->pEvents->clear();
821                dmsg(3,("Key has no more voices now\n"));
822            }
823            else dmsg(1,("gig::Engine: Oops, tried to free a key which contains voices.\n"));
824      }      }
825    
826      /**      /**
827       *  Reacts on supported control change commands (e.g. pitch bend wheel,       *  Reacts on supported control change commands (e.g. pitch bend wheel,
828       *  modulation wheel, aftertouch).       *  modulation wheel, aftertouch).
829       *       *
830       *  @param pControlChangeEvent - controller, value and time stamp of the event       *  @param pEngineChannel - engine channel on which this event occured on
831         *  @param itControlChangeEvent - controller, value and time stamp of the event
832       */       */
833      void Engine::ProcessControlChange(Event* pControlChangeEvent) {      void Engine::ProcessControlChange(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itControlChangeEvent) {
834          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));
835    
836          switch (pControlChangeEvent->Controller) {          switch (itControlChangeEvent->Param.CC.Controller) {
837              case 64: {              case 64: {
838                  if (pControlChangeEvent->Value >= 64 && !SustainPedal) {                  if (itControlChangeEvent->Param.CC.Value >= 64 && !pEngineChannel->SustainPedal) {
839                      dmsg(4,("PEDAL DOWN\n"));                      dmsg(4,("PEDAL DOWN\n"));
840                      SustainPedal = true;                      pEngineChannel->SustainPedal = true;
841    
842                      // cancel release process of voices if necessary                      // cancel release process of voices if necessary
843                      uint* piKey = pActiveKeys->first();                      RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();
844                      if (piKey) {                      if (iuiKey) {
845                          pControlChangeEvent->Type = Event::type_cancel_release; // transform event type                          itControlChangeEvent->Type = Event::type_cancel_release; // transform event type
846                          while (piKey) {                          while (iuiKey) {
847                              midi_key_info_t* pKey = &pMIDIKeyInfo[*piKey];                              midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];
848                              pActiveKeys->set_current(piKey);                              ++iuiKey;
                             piKey = pActiveKeys->next();  
849                              if (!pKey->KeyPressed) {                              if (!pKey->KeyPressed) {
850                                  Event* pNewEvent = pKey->pEvents->alloc();                                  RTList<Event>::Iterator itNewEvent = pKey->pEvents->allocAppend();
851                                  if (pNewEvent) *pNewEvent = *pControlChangeEvent; // copy event to the key's own event list                                  if (itNewEvent) *itNewEvent = *itControlChangeEvent; // copy event to the key's own event list
852                                  else dmsg(1,("Event pool emtpy!\n"));                                  else dmsg(1,("Event pool emtpy!\n"));
853                              }                              }
854                          }                          }
855                      }                      }
856                  }                  }
857                  if (pControlChangeEvent->Value < 64 && SustainPedal) {                  if (itControlChangeEvent->Param.CC.Value < 64 && pEngineChannel->SustainPedal) {
858                      dmsg(4,("PEDAL UP\n"));                      dmsg(4,("PEDAL UP\n"));
859                      SustainPedal = false;                      pEngineChannel->SustainPedal = false;
860    
861                      // release voices if their respective key is not pressed                      // release voices if their respective key is not pressed
862                      uint* piKey = pActiveKeys->first();                      RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();
863                      if (piKey) {                      if (iuiKey) {
864                          pControlChangeEvent->Type = Event::type_release; // transform event type                          itControlChangeEvent->Type = Event::type_release; // transform event type
865                          while (piKey) {                          while (iuiKey) {
866                              midi_key_info_t* pKey = &pMIDIKeyInfo[*piKey];                              midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];
867                              pActiveKeys->set_current(piKey);                              ++iuiKey;
                             piKey = pActiveKeys->next();  
868                              if (!pKey->KeyPressed) {                              if (!pKey->KeyPressed) {
869                                  Event* pNewEvent = pKey->pEvents->alloc();                                  RTList<Event>::Iterator itNewEvent = pKey->pEvents->allocAppend();
870                                  if (pNewEvent) *pNewEvent = *pControlChangeEvent; // copy event to the key's own event list                                  if (itNewEvent) *itNewEvent = *itControlChangeEvent; // copy event to the key's own event list
871                                  else dmsg(1,("Event pool emtpy!\n"));                                  else dmsg(1,("Event pool emtpy!\n"));
872                              }                              }
873                          }                          }
# Line 730  namespace LinuxSampler { namespace gig { Line 878  namespace LinuxSampler { namespace gig {
878          }          }
879    
880          // update controller value in the engine's controller table          // update controller value in the engine's controller table
881          ControllerTable[pControlChangeEvent->Controller] = pControlChangeEvent->Value;          pEngineChannel->ControllerTable[itControlChangeEvent->Param.CC.Controller] = itControlChangeEvent->Param.CC.Value;
882    
883          // move event from the unsorted event list to the control change event list          // move event from the unsorted event list to the control change event list
884          pEvents->move(pControlChangeEvent, pCCEvents);          itControlChangeEvent.moveToEndOf(pCCEvents);
885        }
886    
887        /**
888         *  Reacts on MIDI system exclusive messages.
889         *
890         *  @param itSysexEvent - sysex data size and time stamp of the sysex event
891         */
892        void Engine::ProcessSysex(Pool<Event>::Iterator& itSysexEvent) {
893            RingBuffer<uint8_t>::NonVolatileReader reader = pSysexBuffer->get_non_volatile_reader();
894    
895            uint8_t exclusive_status, id;
896            if (!reader.pop(&exclusive_status)) goto free_sysex_data;
897            if (!reader.pop(&id))               goto free_sysex_data;
898            if (exclusive_status != 0xF0)       goto free_sysex_data;
899    
900            switch (id) {
901                case 0x41: { // Roland
902                    uint8_t device_id, model_id, cmd_id;
903                    if (!reader.pop(&device_id)) goto free_sysex_data;
904                    if (!reader.pop(&model_id))  goto free_sysex_data;
905                    if (!reader.pop(&cmd_id))    goto free_sysex_data;
906                    if (model_id != 0x42 /*GS*/) goto free_sysex_data;
907                    if (cmd_id != 0x12 /*DT1*/)  goto free_sysex_data;
908    
909                    // command address
910                    uint8_t addr[3]; // 2 byte addr MSB, followed by 1 byte addr LSB)
911                    const RingBuffer<uint8_t>::NonVolatileReader checksum_reader = reader; // so we can calculate the check sum later
912                    if (reader.read(&addr[0], 3) != 3) goto free_sysex_data;
913                    if (addr[0] == 0x40 && addr[1] == 0x00) { // System Parameters
914                    }
915                    else if (addr[0] == 0x40 && addr[1] == 0x01) { // Common Parameters
916                    }
917                    else if (addr[0] == 0x40 && (addr[1] & 0xf0) == 0x10) { // Part Parameters (1)
918                        switch (addr[3]) {
919                            case 0x40: { // scale tuning
920                                uint8_t scale_tunes[12]; // detuning of all 12 semitones of an octave
921                                if (reader.read(&scale_tunes[0], 12) != 12) goto free_sysex_data;
922                                uint8_t checksum;
923                                if (!reader.pop(&checksum))                      goto free_sysex_data;
924                                if (GSCheckSum(checksum_reader, 12) != checksum) goto free_sysex_data;
925                                for (int i = 0; i < 12; i++) scale_tunes[i] -= 64;
926                                AdjustScale((int8_t*) scale_tunes);
927                                break;
928                            }
929                        }
930                    }
931                    else if (addr[0] == 0x40 && (addr[1] & 0xf0) == 0x20) { // Part Parameters (2)
932                    }
933                    else if (addr[0] == 0x41) { // Drum Setup Parameters
934                    }
935                    break;
936                }
937            }
938    
939            free_sysex_data: // finally free sysex data
940            pSysexBuffer->increment_read_ptr(itSysexEvent->Param.Sysex.Size);
941        }
942    
943        /**
944         * Calculates the Roland GS sysex check sum.
945         *
946         * @param AddrReader - reader which currently points to the first GS
947         *                     command address byte of the GS sysex message in
948         *                     question
949         * @param DataSize   - size of the GS message data (in bytes)
950         */
951        uint8_t Engine::GSCheckSum(const RingBuffer<uint8_t>::NonVolatileReader AddrReader, uint DataSize) {
952            RingBuffer<uint8_t>::NonVolatileReader reader = AddrReader;
953            uint bytes = 3 /*addr*/ + DataSize;
954            uint8_t addr_and_data[bytes];
955            reader.read(&addr_and_data[0], bytes);
956            uint8_t sum = 0;
957            for (uint i = 0; i < bytes; i++) sum += addr_and_data[i];
958            return 128 - sum % 128;
959        }
960    
961        /**
962         * Allows to tune each of the twelve semitones of an octave.
963         *
964         * @param ScaleTunes - detuning of all twelve semitones (in cents)
965         */
966        void Engine::AdjustScale(int8_t ScaleTunes[12]) {
967            memcpy(&this->ScaleTuning[0], &ScaleTunes[0], 12); //TODO: currently not sample accurate
968      }      }
969    
970      /**      /**
# Line 749  namespace LinuxSampler { namespace gig { Line 980  namespace LinuxSampler { namespace gig {
980             m[i+2] = val;             m[i+2] = val;
981             m[i+3] = val;             m[i+3] = val;
982          }          }
983      }      }    
   
     float Engine::Volume() {  
         return GlobalVolume;  
     }  
   
     void Engine::Volume(float f) {  
         GlobalVolume = f;  
     }  
   
     uint Engine::Channels() {  
         return 2;  
     }  
   
     void Engine::SetOutputChannel(uint EngineAudioChannel, uint AudioDeviceChannel) {  
         AudioChannel* pChannel = pAudioOutputDevice->Channel(AudioDeviceChannel);  
         if (!pChannel) throw AudioOutputException("Invalid audio output device channel " + ToString(AudioDeviceChannel));  
         switch (EngineAudioChannel) {  
             case 0: // left output channel  
                 pOutputLeft = pChannel->Buffer();  
                 AudioDeviceChannelLeft = AudioDeviceChannel;  
                 break;  
             case 1: // right output channel  
                 pOutputRight = pChannel->Buffer();  
                 AudioDeviceChannelRight = AudioDeviceChannel;  
                 break;  
             default:  
                 throw AudioOutputException("Invalid engine audio channel " + ToString(EngineAudioChannel));  
         }  
     }  
   
     int Engine::OutputChannel(uint EngineAudioChannel) {  
         switch (EngineAudioChannel) {  
             case 0: // left channel  
                 return AudioDeviceChannelLeft;  
             case 1: // right channel  
                 return AudioDeviceChannelRight;  
             default:  
                 throw AudioOutputException("Invalid engine audio channel " + ToString(EngineAudioChannel));  
         }  
     }  
984    
985      uint Engine::VoiceCount() {      uint Engine::VoiceCount() {
986          return ActiveVoiceCount;          return ActiveVoiceCount;
# Line 823  namespace LinuxSampler { namespace gig { Line 1014  namespace LinuxSampler { namespace gig {
1014          return "GigEngine";          return "GigEngine";
1015      }      }
1016    
     String Engine::InstrumentFileName() {  
         return InstrumentFile;  
     }  
   
     int Engine::InstrumentIndex() {  
         return InstrumentIdx;  
     }  
   
     int Engine::InstrumentStatus() {  
         return InstrumentStat;  
     }  
   
1017      String Engine::Description() {      String Engine::Description() {
1018          return "Gigasampler Engine";          return "Gigasampler Engine";
1019      }      }
1020    
1021      String Engine::Version() {      String Engine::Version() {
1022          String s = "$Revision: 1.11 $";          String s = "$Revision: 1.28 $";
1023          return s.substr(11, s.size() - 13); // cut dollar signs, spaces and CVS macro keyword          return s.substr(11, s.size() - 13); // cut dollar signs, spaces and CVS macro keyword
1024      }      }
1025    
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