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/*************************************************************************** |
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* * |
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* LinuxSampler - modular, streaming capable sampler * |
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* * |
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* Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck * |
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* * |
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* This program is free software; you can redistribute it and/or modify * |
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* it under the terms of the GNU General Public License as published by * |
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* the Free Software Foundation; either version 2 of the License, or * |
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* (at your option) any later version. * |
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* * |
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* This program is distributed in the hope that it will be useful, * |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of * |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * |
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* GNU General Public License for more details. * |
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* * |
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* You should have received a copy of the GNU General Public License * |
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* along with this program; if not, write to the Free Software * |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, * |
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* MA 02111-1307 USA * |
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***************************************************************************/ |
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|
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#include <sstream> |
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#include "DiskThread.h" |
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#include "Voice.h" |
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#include "EGADSR.h" |
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|
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#include "Engine.h" |
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#include <malloc.h> |
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|
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namespace LinuxSampler { namespace gig { |
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|
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InstrumentResourceManager Engine::Instruments; |
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|
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Engine::Engine() { |
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pRIFF = NULL; |
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pGig = NULL; |
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pInstrument = NULL; |
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pAudioOutputDevice = NULL; |
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pDiskThread = NULL; |
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pEventGenerator = NULL; |
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pSysexBuffer = new RingBuffer<uint8_t>(SYSEX_BUFFER_SIZE, 0); |
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pEventQueue = new RingBuffer<Event>(MAX_EVENTS_PER_FRAGMENT, 0); |
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pEventPool = new Pool<Event>(MAX_EVENTS_PER_FRAGMENT); |
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pVoicePool = new Pool<Voice>(MAX_AUDIO_VOICES); |
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pActiveKeys = new Pool<uint>(128); |
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pVoiceStealingQueue = new RTList<Event>(pEventPool); |
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pEvents = new RTList<Event>(pEventPool); |
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pCCEvents = new RTList<Event>(pEventPool); |
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for (uint i = 0; i < Event::destination_count; i++) { |
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pSynthesisEvents[i] = new RTList<Event>(pEventPool); |
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} |
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for (uint i = 0; i < 128; i++) { |
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pMIDIKeyInfo[i].pActiveVoices = new RTList<Voice>(pVoicePool); |
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pMIDIKeyInfo[i].KeyPressed = false; |
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pMIDIKeyInfo[i].Active = false; |
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pMIDIKeyInfo[i].ReleaseTrigger = false; |
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pMIDIKeyInfo[i].pEvents = new RTList<Event>(pEventPool); |
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} |
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for (RTList<Voice>::Iterator iterVoice = pVoicePool->allocAppend(); iterVoice == pVoicePool->last(); iterVoice = pVoicePool->allocAppend()) { |
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iterVoice->SetEngine(this); |
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} |
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pVoicePool->clear(); |
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|
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pSynthesisParameters[0] = NULL; // we allocate when an audio device is connected |
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pBasicFilterParameters = NULL; |
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pMainFilterParameters = NULL; |
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|
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InstrumentIdx = -1; |
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InstrumentStat = -1; |
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|
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AudioDeviceChannelLeft = -1; |
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AudioDeviceChannelRight = -1; |
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|
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ResetInternal(); |
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} |
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|
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Engine::~Engine() { |
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if (pDiskThread) { |
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dmsg(1,("Stopping disk thread...")); |
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pDiskThread->StopThread(); |
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delete pDiskThread; |
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dmsg(1,("OK\n")); |
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} |
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|
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if (pInstrument) Instruments.HandBack(pInstrument, this); |
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|
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if (pGig) delete pGig; |
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if (pRIFF) delete pRIFF; |
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for (uint i = 0; i < 128; i++) { |
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if (pMIDIKeyInfo[i].pActiveVoices) delete pMIDIKeyInfo[i].pActiveVoices; |
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if (pMIDIKeyInfo[i].pEvents) delete pMIDIKeyInfo[i].pEvents; |
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} |
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for (uint i = 0; i < Event::destination_count; i++) { |
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if (pSynthesisEvents[i]) delete pSynthesisEvents[i]; |
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} |
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if (pEvents) delete pEvents; |
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if (pCCEvents) delete pCCEvents; |
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if (pEventQueue) delete pEventQueue; |
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if (pEventPool) delete pEventPool; |
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if (pVoicePool) { |
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pVoicePool->clear(); |
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delete pVoicePool; |
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} |
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if (pActiveKeys) delete pActiveKeys; |
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if (pSysexBuffer) delete pSysexBuffer; |
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if (pEventGenerator) delete pEventGenerator; |
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if (pMainFilterParameters) delete[] pMainFilterParameters; |
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if (pBasicFilterParameters) delete[] pBasicFilterParameters; |
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if (pSynthesisParameters[0]) free(pSynthesisParameters[0]); |
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if (pVoiceStealingQueue) delete pVoiceStealingQueue; |
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} |
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|
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void Engine::Enable() { |
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dmsg(3,("gig::Engine: enabling\n")); |
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EngineDisabled.PushAndUnlock(false, 2); // set condition object 'EngineDisabled' to false (wait max. 2s) |
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dmsg(3,("gig::Engine: enabled (val=%d)\n", EngineDisabled.GetUnsafe())); |
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} |
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|
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void Engine::Disable() { |
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dmsg(3,("gig::Engine: disabling\n")); |
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bool* pWasDisabled = EngineDisabled.PushAndUnlock(true, 2); // wait max. 2s |
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if (!pWasDisabled) dmsg(3,("gig::Engine warning: Timeout waiting to disable engine.\n")); |
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} |
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|
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void Engine::DisableAndLock() { |
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dmsg(3,("gig::Engine: disabling\n")); |
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bool* pWasDisabled = EngineDisabled.Push(true, 2); // wait max. 2s |
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if (!pWasDisabled) dmsg(3,("gig::Engine warning: Timeout waiting to disable engine.\n")); |
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} |
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|
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/** |
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* Reset all voices and disk thread and clear input event queue and all |
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* control and status variables. |
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*/ |
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void Engine::Reset() { |
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DisableAndLock(); |
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|
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//if (pAudioOutputDevice->IsPlaying()) { // if already running |
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/* |
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// signal audio thread not to enter render part anymore |
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SuspensionRequested = true; |
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// sleep until wakened by audio thread |
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pthread_mutex_lock(&__render_state_mutex); |
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pthread_cond_wait(&__render_exit_condition, &__render_state_mutex); |
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pthread_mutex_unlock(&__render_state_mutex); |
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*/ |
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//} |
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|
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//if (wasplaying) pAudioOutputDevice->Stop(); |
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|
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ResetInternal(); |
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|
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// signal audio thread to continue with rendering |
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//SuspensionRequested = false; |
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Enable(); |
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} |
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|
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/** |
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* Reset all voices and disk thread and clear input event queue and all |
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* control and status variables. This method is not thread safe! |
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*/ |
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void Engine::ResetInternal() { |
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Pitch = 0; |
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SustainPedal = false; |
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ActiveVoiceCount = 0; |
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ActiveVoiceCountMax = 0; |
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GlobalVolume = 1.0; |
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|
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// reset voice stealing parameters |
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itLastStolenVoice = RTList<Voice>::Iterator(); |
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iuiLastStolenKey = RTList<uint>::Iterator(); |
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pVoiceStealingQueue->clear(); |
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|
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// reset to normal chromatic scale (means equal temper) |
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memset(&ScaleTuning[0], 0x00, 12); |
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|
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// set all MIDI controller values to zero |
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memset(ControllerTable, 0x00, 128); |
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|
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// reset key info |
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for (uint i = 0; i < 128; i++) { |
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pMIDIKeyInfo[i].pActiveVoices->clear(); |
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pMIDIKeyInfo[i].pEvents->clear(); |
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pMIDIKeyInfo[i].KeyPressed = false; |
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pMIDIKeyInfo[i].Active = false; |
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pMIDIKeyInfo[i].ReleaseTrigger = false; |
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pMIDIKeyInfo[i].itSelf = Pool<uint>::Iterator(); |
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} |
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|
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// reset all key groups |
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map<uint,uint*>::iterator iter = ActiveKeyGroups.begin(); |
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for (; iter != ActiveKeyGroups.end(); iter++) iter->second = NULL; |
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|
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// reset all voices |
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for (RTList<Voice>::Iterator iterVoice = pVoicePool->allocAppend(); iterVoice == pVoicePool->last(); iterVoice = pVoicePool->allocAppend()) { |
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iterVoice->Reset(); |
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} |
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pVoicePool->clear(); |
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|
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// free all active keys |
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pActiveKeys->clear(); |
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|
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// reset disk thread |
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if (pDiskThread) pDiskThread->Reset(); |
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|
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// delete all input events |
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pEventQueue->init(); |
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} |
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|
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/** |
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* Load an instrument from a .gig file. |
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* |
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* @param FileName - file name of the Gigasampler instrument file |
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* @param Instrument - index of the instrument in the .gig file |
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* @throws LinuxSamplerException on error |
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* @returns detailed description of the method call result |
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*/ |
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void Engine::LoadInstrument(const char* FileName, uint Instrument) { |
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|
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DisableAndLock(); |
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|
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ResetInternal(); // reset engine |
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|
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// free old instrument |
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if (pInstrument) { |
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// give old instrument back to instrument manager |
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Instruments.HandBack(pInstrument, this); |
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} |
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|
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InstrumentFile = FileName; |
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InstrumentIdx = Instrument; |
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InstrumentStat = 0; |
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|
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// delete all key groups |
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ActiveKeyGroups.clear(); |
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|
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// request gig instrument from instrument manager |
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try { |
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instrument_id_t instrid; |
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instrid.FileName = FileName; |
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instrid.iInstrument = Instrument; |
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pInstrument = Instruments.Borrow(instrid, this); |
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if (!pInstrument) { |
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InstrumentStat = -1; |
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dmsg(1,("no instrument loaded!!!\n")); |
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exit(EXIT_FAILURE); |
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} |
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} |
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catch (RIFF::Exception e) { |
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InstrumentStat = -2; |
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String msg = "gig::Engine error: Failed to load instrument, cause: " + e.Message; |
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throw LinuxSamplerException(msg); |
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} |
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catch (InstrumentResourceManagerException e) { |
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InstrumentStat = -3; |
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String msg = "gig::Engine error: Failed to load instrument, cause: " + e.Message(); |
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throw LinuxSamplerException(msg); |
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} |
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catch (...) { |
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InstrumentStat = -4; |
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throw LinuxSamplerException("gig::Engine error: Failed to load instrument, cause: Unknown exception while trying to parse gig file."); |
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} |
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|
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// rebuild ActiveKeyGroups map with key groups of current instrument |
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for (::gig::Region* pRegion = pInstrument->GetFirstRegion(); pRegion; pRegion = pInstrument->GetNextRegion()) |
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if (pRegion->KeyGroup) ActiveKeyGroups[pRegion->KeyGroup] = NULL; |
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|
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InstrumentStat = 100; |
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|
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// inform audio driver for the need of two channels |
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try { |
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if (pAudioOutputDevice) pAudioOutputDevice->AcquireChannels(2); // gig Engine only stereo |
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} |
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catch (AudioOutputException e) { |
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String msg = "Audio output device unable to provide 2 audio channels, cause: " + e.Message(); |
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throw LinuxSamplerException(msg); |
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} |
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|
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Enable(); |
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} |
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|
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/** |
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* Will be called by the InstrumentResourceManager when the instrument |
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* we are currently using in this engine is going to be updated, so we |
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* can stop playback before that happens. |
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*/ |
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void Engine::ResourceToBeUpdated(::gig::Instrument* pResource, void*& pUpdateArg) { |
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dmsg(3,("gig::Engine: Received instrument update message.\n")); |
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DisableAndLock(); |
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ResetInternal(); |
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this->pInstrument = NULL; |
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} |
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|
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/** |
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* Will be called by the InstrumentResourceManager when the instrument |
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* update process was completed, so we can continue with playback. |
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*/ |
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void Engine::ResourceUpdated(::gig::Instrument* pOldResource, ::gig::Instrument* pNewResource, void* pUpdateArg) { |
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this->pInstrument = pNewResource; //TODO: there are couple of engine parameters we should update here as well if the instrument was updated (see LoadInstrument()) |
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Enable(); |
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} |
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|
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void Engine::Connect(AudioOutputDevice* pAudioOut) { |
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pAudioOutputDevice = pAudioOut; |
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|
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ResetInternal(); |
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|
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// inform audio driver for the need of two channels |
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try { |
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pAudioOutputDevice->AcquireChannels(2); // gig engine only stereo |
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} |
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catch (AudioOutputException e) { |
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String msg = "Audio output device unable to provide 2 audio channels, cause: " + e.Message(); |
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throw LinuxSamplerException(msg); |
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} |
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|
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this->AudioDeviceChannelLeft = 0; |
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this->AudioDeviceChannelRight = 1; |
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this->pOutputLeft = pAudioOutputDevice->Channel(0)->Buffer(); |
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this->pOutputRight = pAudioOutputDevice->Channel(1)->Buffer(); |
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this->MaxSamplesPerCycle = pAudioOutputDevice->MaxSamplesPerCycle(); |
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this->SampleRate = pAudioOutputDevice->SampleRate(); |
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|
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// FIXME: audio drivers with varying fragment sizes might be a problem here |
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MaxFadeOutPos = MaxSamplesPerCycle - int(double(SampleRate) * EG_MIN_RELEASE_TIME) - 1; |
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if (MaxFadeOutPos < 0) |
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throw LinuxSamplerException("EG_MIN_RELEASE_TIME in EGADSR.h to big for current audio fragment size / sampling rate!"); |
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|
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// (re)create disk thread |
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if (this->pDiskThread) { |
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dmsg(1,("Stopping disk thread...")); |
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this->pDiskThread->StopThread(); |
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delete this->pDiskThread; |
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dmsg(1,("OK\n")); |
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} |
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this->pDiskThread = new DiskThread(((pAudioOut->MaxSamplesPerCycle() << MAX_PITCH) << 1) + 6); //FIXME: assuming stereo |
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if (!pDiskThread) { |
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dmsg(0,("gig::Engine new diskthread = NULL\n")); |
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exit(EXIT_FAILURE); |
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} |
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|
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for (RTList<Voice>::Iterator iterVoice = pVoicePool->allocAppend(); iterVoice == pVoicePool->last(); iterVoice = pVoicePool->allocAppend()) { |
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iterVoice->pDiskThread = this->pDiskThread; |
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dmsg(3,("d")); |
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} |
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pVoicePool->clear(); |
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|
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// (re)create event generator |
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if (pEventGenerator) delete pEventGenerator; |
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pEventGenerator = new EventGenerator(pAudioOut->SampleRate()); |
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|
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// (re)allocate synthesis parameter matrix |
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if (pSynthesisParameters[0]) free(pSynthesisParameters[0]); |
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pSynthesisParameters[0] = (float *) memalign(16,(Event::destination_count * sizeof(float) * pAudioOut->MaxSamplesPerCycle())); |
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for (int dst = 1; dst < Event::destination_count; dst++) |
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pSynthesisParameters[dst] = pSynthesisParameters[dst - 1] + pAudioOut->MaxSamplesPerCycle(); |
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|
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// (re)allocate biquad filter parameter sequence |
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if (pBasicFilterParameters) delete[] pBasicFilterParameters; |
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if (pMainFilterParameters) delete[] pMainFilterParameters; |
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pBasicFilterParameters = new biquad_param_t[pAudioOut->MaxSamplesPerCycle()]; |
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pMainFilterParameters = new biquad_param_t[pAudioOut->MaxSamplesPerCycle()]; |
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|
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dmsg(1,("Starting disk thread...")); |
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pDiskThread->StartThread(); |
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dmsg(1,("OK\n")); |
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|
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for (RTList<Voice>::Iterator iterVoice = pVoicePool->allocAppend(); iterVoice == pVoicePool->last(); iterVoice = pVoicePool->allocAppend()) { |
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if (!iterVoice->pDiskThread) { |
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dmsg(0,("Engine -> voice::trigger: !pDiskThread\n")); |
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exit(EXIT_FAILURE); |
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} |
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} |
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} |
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|
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void Engine::DisconnectAudioOutputDevice() { |
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if (pAudioOutputDevice) { // if clause to prevent disconnect loops |
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AudioOutputDevice* olddevice = pAudioOutputDevice; |
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pAudioOutputDevice = NULL; |
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olddevice->Disconnect(this); |
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AudioDeviceChannelLeft = -1; |
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AudioDeviceChannelRight = -1; |
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} |
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} |
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|
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/** |
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* Let this engine proceed to render the given amount of sample points. The |
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* calculated audio data of all voices of this engine will be placed into |
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* the engine's audio sum buffer which has to be copied and eventually be |
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* converted to the appropriate value range by the audio output class (e.g. |
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* AlsaIO or JackIO) right after. |
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* |
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* @param Samples - number of sample points to be rendered |
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* @returns 0 on success |
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*/ |
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int Engine::RenderAudio(uint Samples) { |
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dmsg(5,("RenderAudio(Samples=%d)\n", Samples)); |
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|
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// return if no instrument loaded or engine disabled |
401 |
if (EngineDisabled.Pop()) { |
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dmsg(5,("gig::Engine: engine disabled (val=%d)\n",EngineDisabled.GetUnsafe())); |
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return 0; |
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} |
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if (!pInstrument) { |
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dmsg(5,("gig::Engine: no instrument loaded\n")); |
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return 0; |
408 |
} |
409 |
|
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|
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// update time of start and end of this audio fragment (as events' time stamps relate to this) |
412 |
pEventGenerator->UpdateFragmentTime(Samples); |
413 |
|
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|
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// empty the event lists for the new fragment |
416 |
pEvents->clear(); |
417 |
pCCEvents->clear(); |
418 |
for (uint i = 0; i < Event::destination_count; i++) { |
419 |
pSynthesisEvents[i]->clear(); |
420 |
} |
421 |
{ |
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RTList<uint>::Iterator iuiKey = pActiveKeys->first(); |
423 |
RTList<uint>::Iterator end = pActiveKeys->end(); |
424 |
for(; iuiKey != end; ++iuiKey) { |
425 |
pMIDIKeyInfo[*iuiKey].pEvents->clear(); // free all events on the key |
426 |
} |
427 |
} |
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|
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|
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// get all events from the input event queue which belong to the current fragment |
431 |
{ |
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RingBuffer<Event>::NonVolatileReader eventQueueReader = pEventQueue->get_non_volatile_reader(); |
433 |
Event* pEvent; |
434 |
while (true) { |
435 |
// get next event from input event queue |
436 |
if (!(pEvent = eventQueueReader.pop())) break; |
437 |
// if younger event reached, ignore that and all subsequent ones for now |
438 |
if (pEvent->FragmentPos() >= Samples) { |
439 |
eventQueueReader--; |
440 |
dmsg(2,("Younger Event, pos=%d ,Samples=%d!\n",pEvent->FragmentPos(),Samples)); |
441 |
pEvent->ResetFragmentPos(); |
442 |
break; |
443 |
} |
444 |
// copy event to internal event list |
445 |
if (pEvents->poolIsEmpty()) { |
446 |
dmsg(1,("Event pool emtpy!\n")); |
447 |
break; |
448 |
} |
449 |
*pEvents->allocAppend() = *pEvent; |
450 |
} |
451 |
eventQueueReader.free(); // free all copied events from input queue |
452 |
} |
453 |
|
454 |
|
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// process events |
456 |
{ |
457 |
RTList<Event>::Iterator itEvent = pEvents->first(); |
458 |
RTList<Event>::Iterator end = pEvents->end(); |
459 |
for (; itEvent != end; ++itEvent) { |
460 |
switch (itEvent->Type) { |
461 |
case Event::type_note_on: |
462 |
dmsg(5,("Engine: Note on received\n")); |
463 |
ProcessNoteOn(itEvent); |
464 |
break; |
465 |
case Event::type_note_off: |
466 |
dmsg(5,("Engine: Note off received\n")); |
467 |
ProcessNoteOff(itEvent); |
468 |
break; |
469 |
case Event::type_control_change: |
470 |
dmsg(5,("Engine: MIDI CC received\n")); |
471 |
ProcessControlChange(itEvent); |
472 |
break; |
473 |
case Event::type_pitchbend: |
474 |
dmsg(5,("Engine: Pitchbend received\n")); |
475 |
ProcessPitchbend(itEvent); |
476 |
break; |
477 |
case Event::type_sysex: |
478 |
dmsg(5,("Engine: Sysex received\n")); |
479 |
ProcessSysex(itEvent); |
480 |
break; |
481 |
} |
482 |
} |
483 |
} |
484 |
|
485 |
|
486 |
int active_voices = 0; |
487 |
|
488 |
// render audio from all active voices |
489 |
{ |
490 |
RTList<uint>::Iterator iuiKey = pActiveKeys->first(); |
491 |
RTList<uint>::Iterator end = pActiveKeys->end(); |
492 |
while (iuiKey != end) { // iterate through all active keys |
493 |
midi_key_info_t* pKey = &pMIDIKeyInfo[*iuiKey]; |
494 |
++iuiKey; |
495 |
|
496 |
RTList<Voice>::Iterator itVoice = pKey->pActiveVoices->first(); |
497 |
RTList<Voice>::Iterator itVoicesEnd = pKey->pActiveVoices->end(); |
498 |
for (; itVoice != itVoicesEnd; ++itVoice) { // iterate through all voices on this key |
499 |
// now render current voice |
500 |
itVoice->Render(Samples); |
501 |
if (itVoice->IsActive()) active_voices++; // still active |
502 |
else { // voice reached end, is now inactive |
503 |
FreeVoice(itVoice); // remove voice from the list of active voices |
504 |
} |
505 |
} |
506 |
} |
507 |
} |
508 |
|
509 |
|
510 |
// now render all postponed voices from voice stealing |
511 |
{ |
512 |
RTList<Event>::Iterator itVoiceStealEvent = pVoiceStealingQueue->first(); |
513 |
RTList<Event>::Iterator end = pVoiceStealingQueue->end(); |
514 |
for (; itVoiceStealEvent != end; ++itVoiceStealEvent) { |
515 |
Pool<Voice>::Iterator itNewVoice = LaunchVoice(itVoiceStealEvent, itVoiceStealEvent->Param.Note.Layer, itVoiceStealEvent->Param.Note.ReleaseTrigger, false); |
516 |
if (itNewVoice) { |
517 |
for (; itNewVoice; itNewVoice = itNewVoice->itChildVoice) { |
518 |
itNewVoice->Render(Samples); |
519 |
if (itNewVoice->IsActive()) active_voices++; // still active |
520 |
else { // voice reached end, is now inactive |
521 |
FreeVoice(itNewVoice); // remove voice from the list of active voices |
522 |
} |
523 |
} |
524 |
} |
525 |
else dmsg(1,("gig::Engine: ERROR, voice stealing didn't work out!\n")); |
526 |
} |
527 |
} |
528 |
// reset voice stealing for the new fragment |
529 |
pVoiceStealingQueue->clear(); |
530 |
itLastStolenVoice = RTList<Voice>::Iterator(); |
531 |
iuiLastStolenKey = RTList<uint>::Iterator(); |
532 |
|
533 |
|
534 |
// free all keys which have no active voices left |
535 |
{ |
536 |
RTList<uint>::Iterator iuiKey = pActiveKeys->first(); |
537 |
RTList<uint>::Iterator end = pActiveKeys->end(); |
538 |
while (iuiKey != end) { // iterate through all active keys |
539 |
midi_key_info_t* pKey = &pMIDIKeyInfo[*iuiKey]; |
540 |
++iuiKey; |
541 |
if (pKey->pActiveVoices->isEmpty()) FreeKey(pKey); |
542 |
#if DEVMODE |
543 |
else { // FIXME: should be removed before the final release (purpose: just a sanity check for debugging) |
544 |
RTList<Voice>::Iterator itVoice = pKey->pActiveVoices->first(); |
545 |
RTList<Voice>::Iterator itVoicesEnd = pKey->pActiveVoices->end(); |
546 |
for (; itVoice != itVoicesEnd; ++itVoice) { // iterate through all voices on this key |
547 |
if (itVoice->itKillEvent) { |
548 |
dmsg(1,("gig::Engine: ERROR, killed voice survived !!!\n")); |
549 |
} |
550 |
} |
551 |
} |
552 |
#endif // DEVMODE |
553 |
} |
554 |
} |
555 |
|
556 |
|
557 |
// write that to the disk thread class so that it can print it |
558 |
// on the console for debugging purposes |
559 |
ActiveVoiceCount = active_voices; |
560 |
if (ActiveVoiceCount > ActiveVoiceCountMax) ActiveVoiceCountMax = ActiveVoiceCount; |
561 |
|
562 |
|
563 |
return 0; |
564 |
} |
565 |
|
566 |
/** |
567 |
* Will be called by the MIDIIn Thread to let the audio thread trigger a new |
568 |
* voice for the given key. |
569 |
* |
570 |
* @param Key - MIDI key number of the triggered key |
571 |
* @param Velocity - MIDI velocity value of the triggered key |
572 |
*/ |
573 |
void Engine::SendNoteOn(uint8_t Key, uint8_t Velocity) { |
574 |
Event event = pEventGenerator->CreateEvent(); |
575 |
event.Type = Event::type_note_on; |
576 |
event.Param.Note.Key = Key; |
577 |
event.Param.Note.Velocity = Velocity; |
578 |
if (this->pEventQueue->write_space() > 0) this->pEventQueue->push(&event); |
579 |
else dmsg(1,("Engine: Input event queue full!")); |
580 |
} |
581 |
|
582 |
/** |
583 |
* Will be called by the MIDIIn Thread to signal the audio thread to release |
584 |
* voice(s) on the given key. |
585 |
* |
586 |
* @param Key - MIDI key number of the released key |
587 |
* @param Velocity - MIDI release velocity value of the released key |
588 |
*/ |
589 |
void Engine::SendNoteOff(uint8_t Key, uint8_t Velocity) { |
590 |
Event event = pEventGenerator->CreateEvent(); |
591 |
event.Type = Event::type_note_off; |
592 |
event.Param.Note.Key = Key; |
593 |
event.Param.Note.Velocity = Velocity; |
594 |
if (this->pEventQueue->write_space() > 0) this->pEventQueue->push(&event); |
595 |
else dmsg(1,("Engine: Input event queue full!")); |
596 |
} |
597 |
|
598 |
/** |
599 |
* Will be called by the MIDIIn Thread to signal the audio thread to change |
600 |
* the pitch value for all voices. |
601 |
* |
602 |
* @param Pitch - MIDI pitch value (-8192 ... +8191) |
603 |
*/ |
604 |
void Engine::SendPitchbend(int Pitch) { |
605 |
Event event = pEventGenerator->CreateEvent(); |
606 |
event.Type = Event::type_pitchbend; |
607 |
event.Param.Pitch.Pitch = Pitch; |
608 |
if (this->pEventQueue->write_space() > 0) this->pEventQueue->push(&event); |
609 |
else dmsg(1,("Engine: Input event queue full!")); |
610 |
} |
611 |
|
612 |
/** |
613 |
* Will be called by the MIDIIn Thread to signal the audio thread that a |
614 |
* continuous controller value has changed. |
615 |
* |
616 |
* @param Controller - MIDI controller number of the occured control change |
617 |
* @param Value - value of the control change |
618 |
*/ |
619 |
void Engine::SendControlChange(uint8_t Controller, uint8_t Value) { |
620 |
Event event = pEventGenerator->CreateEvent(); |
621 |
event.Type = Event::type_control_change; |
622 |
event.Param.CC.Controller = Controller; |
623 |
event.Param.CC.Value = Value; |
624 |
if (this->pEventQueue->write_space() > 0) this->pEventQueue->push(&event); |
625 |
else dmsg(1,("Engine: Input event queue full!")); |
626 |
} |
627 |
|
628 |
/** |
629 |
* Will be called by the MIDI input device whenever a MIDI system |
630 |
* exclusive message has arrived. |
631 |
* |
632 |
* @param pData - pointer to sysex data |
633 |
* @param Size - lenght of sysex data (in bytes) |
634 |
*/ |
635 |
void Engine::SendSysex(void* pData, uint Size) { |
636 |
Event event = pEventGenerator->CreateEvent(); |
637 |
event.Type = Event::type_sysex; |
638 |
event.Param.Sysex.Size = Size; |
639 |
if (pEventQueue->write_space() > 0) { |
640 |
if (pSysexBuffer->write_space() >= Size) { |
641 |
// copy sysex data to input buffer |
642 |
uint toWrite = Size; |
643 |
uint8_t* pPos = (uint8_t*) pData; |
644 |
while (toWrite) { |
645 |
const uint writeNow = RTMath::Min(toWrite, pSysexBuffer->write_space_to_end()); |
646 |
pSysexBuffer->write(pPos, writeNow); |
647 |
toWrite -= writeNow; |
648 |
pPos += writeNow; |
649 |
|
650 |
} |
651 |
// finally place sysex event into input event queue |
652 |
pEventQueue->push(&event); |
653 |
} |
654 |
else dmsg(1,("Engine: Sysex message too large (%d byte) for input buffer (%d byte)!",Size,SYSEX_BUFFER_SIZE)); |
655 |
} |
656 |
else dmsg(1,("Engine: Input event queue full!")); |
657 |
} |
658 |
|
659 |
/** |
660 |
* Assigns and triggers a new voice for the respective MIDI key. |
661 |
* |
662 |
* @param itNoteOnEvent - key, velocity and time stamp of the event |
663 |
*/ |
664 |
void Engine::ProcessNoteOn(Pool<Event>::Iterator& itNoteOnEvent) { |
665 |
midi_key_info_t* pKey = &pMIDIKeyInfo[itNoteOnEvent->Param.Note.Key]; |
666 |
|
667 |
pKey->KeyPressed = true; // the MIDI key was now pressed down |
668 |
|
669 |
// cancel release process of voices on this key if needed |
670 |
if (pKey->Active && !SustainPedal) { |
671 |
RTList<Event>::Iterator itCancelReleaseEvent = pKey->pEvents->allocAppend(); |
672 |
if (itCancelReleaseEvent) { |
673 |
*itCancelReleaseEvent = *itNoteOnEvent; // copy event |
674 |
itCancelReleaseEvent->Type = Event::type_cancel_release; // transform event type |
675 |
} |
676 |
else dmsg(1,("Event pool emtpy!\n")); |
677 |
} |
678 |
|
679 |
// move note on event to the key's own event list |
680 |
RTList<Event>::Iterator itNoteOnEventOnKeyList = itNoteOnEvent.moveToEndOf(pKey->pEvents); |
681 |
|
682 |
// allocate and trigger a new voice for the key |
683 |
LaunchVoice(itNoteOnEventOnKeyList, 0, false, true); |
684 |
} |
685 |
|
686 |
/** |
687 |
* Releases the voices on the given key if sustain pedal is not pressed. |
688 |
* If sustain is pressed, the release of the note will be postponed until |
689 |
* sustain pedal will be released or voice turned inactive by itself (e.g. |
690 |
* due to completion of sample playback). |
691 |
* |
692 |
* @param itNoteOffEvent - key, velocity and time stamp of the event |
693 |
*/ |
694 |
void Engine::ProcessNoteOff(Pool<Event>::Iterator& itNoteOffEvent) { |
695 |
midi_key_info_t* pKey = &pMIDIKeyInfo[itNoteOffEvent->Param.Note.Key]; |
696 |
|
697 |
pKey->KeyPressed = false; // the MIDI key was now released |
698 |
|
699 |
// release voices on this key if needed |
700 |
if (pKey->Active && !SustainPedal) { |
701 |
itNoteOffEvent->Type = Event::type_release; // transform event type |
702 |
} |
703 |
|
704 |
// move event to the key's own event list |
705 |
RTList<Event>::Iterator itNoteOffEventOnKeyList = itNoteOffEvent.moveToEndOf(pKey->pEvents); |
706 |
|
707 |
// spawn release triggered voice(s) if needed |
708 |
if (pKey->ReleaseTrigger) { |
709 |
LaunchVoice(itNoteOffEventOnKeyList, 0, true, false); //FIXME: for the moment we don't perform voice stealing for release triggered samples |
710 |
pKey->ReleaseTrigger = false; |
711 |
} |
712 |
} |
713 |
|
714 |
/** |
715 |
* Moves pitchbend event from the general (input) event list to the pitch |
716 |
* event list. |
717 |
* |
718 |
* @param itPitchbendEvent - absolute pitch value and time stamp of the event |
719 |
*/ |
720 |
void Engine::ProcessPitchbend(Pool<Event>::Iterator& itPitchbendEvent) { |
721 |
this->Pitch = itPitchbendEvent->Param.Pitch.Pitch; // store current pitch value |
722 |
itPitchbendEvent.moveToEndOf(pSynthesisEvents[Event::destination_vco]); |
723 |
} |
724 |
|
725 |
/** |
726 |
* Allocates and triggers a new voice. This method will usually be |
727 |
* called by the ProcessNoteOn() method and by the voices itself |
728 |
* (e.g. to spawn further voices on the same key for layered sounds). |
729 |
* |
730 |
* @param itNoteOnEvent - key, velocity and time stamp of the event |
731 |
* @param iLayer - layer index for the new voice (optional - only |
732 |
* in case of layered sounds of course) |
733 |
* @param ReleaseTriggerVoice - if new voice is a release triggered voice |
734 |
* (optional, default = false) |
735 |
* @param VoiceStealing - if voice stealing should be performed |
736 |
* when there is no free voice |
737 |
* (optional, default = true) |
738 |
* @returns pointer to new voice or NULL if there was no free voice or |
739 |
* if an error occured while trying to trigger the new voice |
740 |
*/ |
741 |
Pool<Voice>::Iterator Engine::LaunchVoice(Pool<Event>::Iterator& itNoteOnEvent, int iLayer, bool ReleaseTriggerVoice, bool VoiceStealing) { |
742 |
midi_key_info_t* pKey = &pMIDIKeyInfo[itNoteOnEvent->Param.Note.Key]; |
743 |
|
744 |
// allocate a new voice for the key |
745 |
Pool<Voice>::Iterator itNewVoice = pKey->pActiveVoices->allocAppend(); |
746 |
if (itNewVoice) { |
747 |
// launch the new voice |
748 |
if (itNewVoice->Trigger(itNoteOnEvent, this->Pitch, this->pInstrument, iLayer, ReleaseTriggerVoice, VoiceStealing) < 0) { |
749 |
dmsg(1,("Triggering new voice failed!\n")); |
750 |
pKey->pActiveVoices->free(itNewVoice); |
751 |
} |
752 |
else { // on success |
753 |
uint** ppKeyGroup = NULL; |
754 |
if (itNewVoice->KeyGroup) { // if this voice / key belongs to a key group |
755 |
ppKeyGroup = &ActiveKeyGroups[itNewVoice->KeyGroup]; |
756 |
if (*ppKeyGroup) { // if there's already an active key in that key group |
757 |
midi_key_info_t* pOtherKey = &pMIDIKeyInfo[**ppKeyGroup]; |
758 |
// kill all voices on the (other) key |
759 |
RTList<Voice>::Iterator itVoiceToBeKilled = pOtherKey->pActiveVoices->first(); |
760 |
RTList<Voice>::Iterator end = pOtherKey->pActiveVoices->end(); |
761 |
for (; itVoiceToBeKilled != end; ++itVoiceToBeKilled) { |
762 |
if (itVoiceToBeKilled->Type != Voice::type_release_trigger) itVoiceToBeKilled->Kill(itNoteOnEvent); |
763 |
} |
764 |
} |
765 |
} |
766 |
if (!pKey->Active) { // mark as active key |
767 |
pKey->Active = true; |
768 |
pKey->itSelf = pActiveKeys->allocAppend(); |
769 |
*pKey->itSelf = itNoteOnEvent->Param.Note.Key; |
770 |
} |
771 |
if (itNewVoice->KeyGroup) { |
772 |
*ppKeyGroup = &*pKey->itSelf; // put key as the (new) active key to its key group |
773 |
} |
774 |
if (itNewVoice->Type == Voice::type_release_trigger_required) pKey->ReleaseTrigger = true; // mark key for the need of release triggered voice(s) |
775 |
return itNewVoice; // success |
776 |
} |
777 |
} |
778 |
else if (VoiceStealing) { |
779 |
// first, get total amount of required voices (dependant on amount of layers) |
780 |
::gig::Region* pRegion = pInstrument->GetRegion(itNoteOnEvent->Param.Note.Key); |
781 |
if (!pRegion) return Pool<Voice>::Iterator(); // nothing defined for this MIDI key, so no voice needed |
782 |
int voicesRequired = pRegion->Layers; |
783 |
|
784 |
// now steal the (remaining) amount of voices |
785 |
for (int i = iLayer; i < voicesRequired; i++) |
786 |
StealVoice(itNoteOnEvent); |
787 |
|
788 |
// put note-on event into voice-stealing queue, so it will be reprocessed after killed voice died |
789 |
RTList<Event>::Iterator itStealEvent = pVoiceStealingQueue->allocAppend(); |
790 |
if (itStealEvent) { |
791 |
*itStealEvent = *itNoteOnEvent; // copy event |
792 |
itStealEvent->Param.Note.Layer = iLayer; |
793 |
itStealEvent->Param.Note.ReleaseTrigger = ReleaseTriggerVoice; |
794 |
} |
795 |
else dmsg(1,("Voice stealing queue full!\n")); |
796 |
} |
797 |
|
798 |
return Pool<Voice>::Iterator(); // no free voice or error |
799 |
} |
800 |
|
801 |
/** |
802 |
* Will be called by LaunchVoice() method in case there are no free |
803 |
* voices left. This method will select and kill one old voice for |
804 |
* voice stealing and postpone the note-on event until the selected |
805 |
* voice actually died. |
806 |
* |
807 |
* @param itNoteOnEvent - key, velocity and time stamp of the event |
808 |
*/ |
809 |
void Engine::StealVoice(Pool<Event>::Iterator& itNoteOnEvent) { |
810 |
if (!pEventPool->poolIsEmpty()) { |
811 |
|
812 |
RTList<uint>::Iterator iuiOldestKey; |
813 |
RTList<Voice>::Iterator itOldestVoice; |
814 |
|
815 |
// Select one voice for voice stealing |
816 |
switch (VOICE_STEAL_ALGORITHM) { |
817 |
|
818 |
// try to pick the oldest voice on the key where the new |
819 |
// voice should be spawned, if there is no voice on that |
820 |
// key, or no voice left to kill there, then procceed with |
821 |
// 'oldestkey' algorithm |
822 |
case voice_steal_algo_keymask: { |
823 |
midi_key_info_t* pOldestKey = &pMIDIKeyInfo[itNoteOnEvent->Param.Note.Key]; |
824 |
if (itLastStolenVoice) { |
825 |
itOldestVoice = itLastStolenVoice; |
826 |
++itOldestVoice; |
827 |
} |
828 |
else { // no voice stolen in this audio fragment cycle yet |
829 |
itOldestVoice = pOldestKey->pActiveVoices->first(); |
830 |
} |
831 |
if (itOldestVoice) { |
832 |
iuiOldestKey = pOldestKey->itSelf; |
833 |
break; // selection succeeded |
834 |
} |
835 |
} // no break - intentional ! |
836 |
|
837 |
// try to pick the oldest voice on the oldest active key |
838 |
// (caution: must stay after 'keymask' algorithm !) |
839 |
case voice_steal_algo_oldestkey: { |
840 |
if (itLastStolenVoice) { |
841 |
midi_key_info_t* pOldestKey = &pMIDIKeyInfo[*iuiLastStolenKey]; |
842 |
itOldestVoice = itLastStolenVoice; |
843 |
++itOldestVoice; |
844 |
if (!itOldestVoice) { |
845 |
iuiOldestKey = iuiLastStolenKey; |
846 |
++iuiOldestKey; |
847 |
if (iuiOldestKey) { |
848 |
midi_key_info_t* pOldestKey = &pMIDIKeyInfo[*iuiOldestKey]; |
849 |
itOldestVoice = pOldestKey->pActiveVoices->first(); |
850 |
} |
851 |
else { |
852 |
dmsg(1,("gig::Engine: Warning, too less voices, even for voice stealing! - Better recompile with higher MAX_AUDIO_VOICES.\n")); |
853 |
return; |
854 |
} |
855 |
} |
856 |
else iuiOldestKey = iuiLastStolenKey; |
857 |
} |
858 |
else { // no voice stolen in this audio fragment cycle yet |
859 |
iuiOldestKey = pActiveKeys->first(); |
860 |
midi_key_info_t* pOldestKey = &pMIDIKeyInfo[*iuiOldestKey]; |
861 |
itOldestVoice = pOldestKey->pActiveVoices->first(); |
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; |
871 |
} |
872 |
} |
873 |
|
874 |
//FIXME: can be removed, just a sanity check for debugging |
875 |
if (!itOldestVoice->IsActive()) dmsg(1,("gig::Engine: ERROR, tried to steal a voice which was not active !!!\n")); |
876 |
|
877 |
// now kill the selected voice |
878 |
itOldestVoice->Kill(itNoteOnEvent); |
879 |
// remember which voice on which key we stole, so we can simply proceed for the next voice stealing |
880 |
this->itLastStolenVoice = itOldestVoice; |
881 |
this->iuiLastStolenKey = iuiOldestKey; |
882 |
} |
883 |
else dmsg(1,("Event pool emtpy!\n")); |
884 |
} |
885 |
|
886 |
/** |
887 |
* Removes the given voice from the MIDI key's list of active voices. |
888 |
* This method will be called when a voice went inactive, e.g. because |
889 |
* it finished to playback its sample, finished its release stage or |
890 |
* just was killed. |
891 |
* |
892 |
* @param itVoice - points to the voice to be freed |
893 |
*/ |
894 |
void Engine::FreeVoice(Pool<Voice>::Iterator& itVoice) { |
895 |
if (itVoice) { |
896 |
midi_key_info_t* pKey = &pMIDIKeyInfo[itVoice->MIDIKey]; |
897 |
|
898 |
uint keygroup = itVoice->KeyGroup; |
899 |
|
900 |
// free the voice object |
901 |
pVoicePool->free(itVoice); |
902 |
|
903 |
// if no other voices left and member of a key group, remove from key group |
904 |
if (pKey->pActiveVoices->isEmpty() && keygroup) { |
905 |
uint** ppKeyGroup = &ActiveKeyGroups[keygroup]; |
906 |
if (*ppKeyGroup == &*pKey->itSelf) *ppKeyGroup = NULL; // remove key from key group |
907 |
} |
908 |
} |
909 |
else std::cerr << "Couldn't release voice! (!itVoice)\n" << std::flush; |
910 |
} |
911 |
|
912 |
/** |
913 |
* Called when there's no more voice left on a key, this call will |
914 |
* update the key info respectively. |
915 |
* |
916 |
* @param pKey - key which is now inactive |
917 |
*/ |
918 |
void Engine::FreeKey(midi_key_info_t* pKey) { |
919 |
if (pKey->pActiveVoices->isEmpty()) { |
920 |
pKey->Active = false; |
921 |
pActiveKeys->free(pKey->itSelf); // remove key from list of active keys |
922 |
pKey->itSelf = RTList<uint>::Iterator(); |
923 |
pKey->ReleaseTrigger = false; |
924 |
pKey->pEvents->clear(); |
925 |
dmsg(3,("Key has no more voices now\n")); |
926 |
} |
927 |
else dmsg(1,("gig::Engine: Oops, tried to free a key which contains voices.\n")); |
928 |
} |
929 |
|
930 |
/** |
931 |
* Reacts on supported control change commands (e.g. pitch bend wheel, |
932 |
* modulation wheel, aftertouch). |
933 |
* |
934 |
* @param itControlChangeEvent - controller, value and time stamp of the event |
935 |
*/ |
936 |
void Engine::ProcessControlChange(Pool<Event>::Iterator& itControlChangeEvent) { |
937 |
dmsg(4,("Engine::ContinuousController cc=%d v=%d\n", itControlChangeEvent->Param.CC.Controller, itControlChangeEvent->Param.CC.Value)); |
938 |
|
939 |
switch (itControlChangeEvent->Param.CC.Controller) { |
940 |
case 64: { |
941 |
if (itControlChangeEvent->Param.CC.Value >= 64 && !SustainPedal) { |
942 |
dmsg(4,("PEDAL DOWN\n")); |
943 |
SustainPedal = true; |
944 |
|
945 |
// cancel release process of voices if necessary |
946 |
RTList<uint>::Iterator iuiKey = pActiveKeys->first(); |
947 |
if (iuiKey) { |
948 |
itControlChangeEvent->Type = Event::type_cancel_release; // transform event type |
949 |
while (iuiKey) { |
950 |
midi_key_info_t* pKey = &pMIDIKeyInfo[*iuiKey]; |
951 |
++iuiKey; |
952 |
if (!pKey->KeyPressed) { |
953 |
RTList<Event>::Iterator itNewEvent = pKey->pEvents->allocAppend(); |
954 |
if (itNewEvent) *itNewEvent = *itControlChangeEvent; // copy event to the key's own event list |
955 |
else dmsg(1,("Event pool emtpy!\n")); |
956 |
} |
957 |
} |
958 |
} |
959 |
} |
960 |
if (itControlChangeEvent->Param.CC.Value < 64 && SustainPedal) { |
961 |
dmsg(4,("PEDAL UP\n")); |
962 |
SustainPedal = false; |
963 |
|
964 |
// release voices if their respective key is not pressed |
965 |
RTList<uint>::Iterator iuiKey = pActiveKeys->first(); |
966 |
if (iuiKey) { |
967 |
itControlChangeEvent->Type = Event::type_release; // transform event type |
968 |
while (iuiKey) { |
969 |
midi_key_info_t* pKey = &pMIDIKeyInfo[*iuiKey]; |
970 |
++iuiKey; |
971 |
if (!pKey->KeyPressed) { |
972 |
RTList<Event>::Iterator itNewEvent = pKey->pEvents->allocAppend(); |
973 |
if (itNewEvent) *itNewEvent = *itControlChangeEvent; // copy event to the key's own event list |
974 |
else dmsg(1,("Event pool emtpy!\n")); |
975 |
} |
976 |
} |
977 |
} |
978 |
} |
979 |
break; |
980 |
} |
981 |
} |
982 |
|
983 |
// update controller value in the engine's controller table |
984 |
ControllerTable[itControlChangeEvent->Param.CC.Controller] = itControlChangeEvent->Param.CC.Value; |
985 |
|
986 |
// move event from the unsorted event list to the control change event list |
987 |
itControlChangeEvent.moveToEndOf(pCCEvents); |
988 |
} |
989 |
|
990 |
/** |
991 |
* Reacts on MIDI system exclusive messages. |
992 |
* |
993 |
* @param itSysexEvent - sysex data size and time stamp of the sysex event |
994 |
*/ |
995 |
void Engine::ProcessSysex(Pool<Event>::Iterator& itSysexEvent) { |
996 |
RingBuffer<uint8_t>::NonVolatileReader reader = pSysexBuffer->get_non_volatile_reader(); |
997 |
|
998 |
uint8_t exclusive_status, id; |
999 |
if (!reader.pop(&exclusive_status)) goto free_sysex_data; |
1000 |
if (!reader.pop(&id)) goto free_sysex_data; |
1001 |
if (exclusive_status != 0xF0) goto free_sysex_data; |
1002 |
|
1003 |
switch (id) { |
1004 |
case 0x41: { // Roland |
1005 |
uint8_t device_id, model_id, cmd_id; |
1006 |
if (!reader.pop(&device_id)) goto free_sysex_data; |
1007 |
if (!reader.pop(&model_id)) goto free_sysex_data; |
1008 |
if (!reader.pop(&cmd_id)) goto free_sysex_data; |
1009 |
if (model_id != 0x42 /*GS*/) goto free_sysex_data; |
1010 |
if (cmd_id != 0x12 /*DT1*/) goto free_sysex_data; |
1011 |
|
1012 |
// command address |
1013 |
uint8_t addr[3]; // 2 byte addr MSB, followed by 1 byte addr LSB) |
1014 |
const RingBuffer<uint8_t>::NonVolatileReader checksum_reader = reader; // so we can calculate the check sum later |
1015 |
if (reader.read(&addr[0], 3) != 3) goto free_sysex_data; |
1016 |
if (addr[0] == 0x40 && addr[1] == 0x00) { // System Parameters |
1017 |
} |
1018 |
else if (addr[0] == 0x40 && addr[1] == 0x01) { // Common Parameters |
1019 |
} |
1020 |
else if (addr[0] == 0x40 && (addr[1] & 0xf0) == 0x10) { // Part Parameters (1) |
1021 |
switch (addr[3]) { |
1022 |
case 0x40: { // scale tuning |
1023 |
uint8_t scale_tunes[12]; // detuning of all 12 semitones of an octave |
1024 |
if (reader.read(&scale_tunes[0], 12) != 12) goto free_sysex_data; |
1025 |
uint8_t checksum; |
1026 |
if (!reader.pop(&checksum)) goto free_sysex_data; |
1027 |
if (GSCheckSum(checksum_reader, 12) != checksum) goto free_sysex_data; |
1028 |
for (int i = 0; i < 12; i++) scale_tunes[i] -= 64; |
1029 |
AdjustScale((int8_t*) scale_tunes); |
1030 |
break; |
1031 |
} |
1032 |
} |
1033 |
} |
1034 |
else if (addr[0] == 0x40 && (addr[1] & 0xf0) == 0x20) { // Part Parameters (2) |
1035 |
} |
1036 |
else if (addr[0] == 0x41) { // Drum Setup Parameters |
1037 |
} |
1038 |
break; |
1039 |
} |
1040 |
} |
1041 |
|
1042 |
free_sysex_data: // finally free sysex data |
1043 |
pSysexBuffer->increment_read_ptr(itSysexEvent->Param.Sysex.Size); |
1044 |
} |
1045 |
|
1046 |
/** |
1047 |
* Calculates the Roland GS sysex check sum. |
1048 |
* |
1049 |
* @param AddrReader - reader which currently points to the first GS |
1050 |
* command address byte of the GS sysex message in |
1051 |
* question |
1052 |
* @param DataSize - size of the GS message data (in bytes) |
1053 |
*/ |
1054 |
uint8_t Engine::GSCheckSum(const RingBuffer<uint8_t>::NonVolatileReader AddrReader, uint DataSize) { |
1055 |
RingBuffer<uint8_t>::NonVolatileReader reader = AddrReader; |
1056 |
uint bytes = 3 /*addr*/ + DataSize; |
1057 |
uint8_t addr_and_data[bytes]; |
1058 |
reader.read(&addr_and_data[0], bytes); |
1059 |
uint8_t sum = 0; |
1060 |
for (uint i = 0; i < bytes; i++) sum += addr_and_data[i]; |
1061 |
return 128 - sum % 128; |
1062 |
} |
1063 |
|
1064 |
/** |
1065 |
* Allows to tune each of the twelve semitones of an octave. |
1066 |
* |
1067 |
* @param ScaleTunes - detuning of all twelve semitones (in cents) |
1068 |
*/ |
1069 |
void Engine::AdjustScale(int8_t ScaleTunes[12]) { |
1070 |
memcpy(&this->ScaleTuning[0], &ScaleTunes[0], 12); //TODO: currently not sample accurate |
1071 |
} |
1072 |
|
1073 |
/** |
1074 |
* Initialize the parameter sequence for the modulation destination given by |
1075 |
* by 'dst' with the constant value given by val. |
1076 |
*/ |
1077 |
void Engine::ResetSynthesisParameters(Event::destination_t dst, float val) { |
1078 |
int maxsamples = pAudioOutputDevice->MaxSamplesPerCycle(); |
1079 |
float* m = &pSynthesisParameters[dst][0]; |
1080 |
for (int i = 0; i < maxsamples; i += 4) { |
1081 |
m[i] = val; |
1082 |
m[i+1] = val; |
1083 |
m[i+2] = val; |
1084 |
m[i+3] = val; |
1085 |
} |
1086 |
} |
1087 |
|
1088 |
float Engine::Volume() { |
1089 |
return GlobalVolume; |
1090 |
} |
1091 |
|
1092 |
void Engine::Volume(float f) { |
1093 |
GlobalVolume = f; |
1094 |
} |
1095 |
|
1096 |
uint Engine::Channels() { |
1097 |
return 2; |
1098 |
} |
1099 |
|
1100 |
void Engine::SetOutputChannel(uint EngineAudioChannel, uint AudioDeviceChannel) { |
1101 |
AudioChannel* pChannel = pAudioOutputDevice->Channel(AudioDeviceChannel); |
1102 |
if (!pChannel) throw AudioOutputException("Invalid audio output device channel " + ToString(AudioDeviceChannel)); |
1103 |
switch (EngineAudioChannel) { |
1104 |
case 0: // left output channel |
1105 |
pOutputLeft = pChannel->Buffer(); |
1106 |
AudioDeviceChannelLeft = AudioDeviceChannel; |
1107 |
break; |
1108 |
case 1: // right output channel |
1109 |
pOutputRight = pChannel->Buffer(); |
1110 |
AudioDeviceChannelRight = AudioDeviceChannel; |
1111 |
break; |
1112 |
default: |
1113 |
throw AudioOutputException("Invalid engine audio channel " + ToString(EngineAudioChannel)); |
1114 |
} |
1115 |
} |
1116 |
|
1117 |
int Engine::OutputChannel(uint EngineAudioChannel) { |
1118 |
switch (EngineAudioChannel) { |
1119 |
case 0: // left channel |
1120 |
return AudioDeviceChannelLeft; |
1121 |
case 1: // right channel |
1122 |
return AudioDeviceChannelRight; |
1123 |
default: |
1124 |
throw AudioOutputException("Invalid engine audio channel " + ToString(EngineAudioChannel)); |
1125 |
} |
1126 |
} |
1127 |
|
1128 |
uint Engine::VoiceCount() { |
1129 |
return ActiveVoiceCount; |
1130 |
} |
1131 |
|
1132 |
uint Engine::VoiceCountMax() { |
1133 |
return ActiveVoiceCountMax; |
1134 |
} |
1135 |
|
1136 |
bool Engine::DiskStreamSupported() { |
1137 |
return true; |
1138 |
} |
1139 |
|
1140 |
uint Engine::DiskStreamCount() { |
1141 |
return (pDiskThread) ? pDiskThread->ActiveStreamCount : 0; |
1142 |
} |
1143 |
|
1144 |
uint Engine::DiskStreamCountMax() { |
1145 |
return (pDiskThread) ? pDiskThread->ActiveStreamCountMax : 0; |
1146 |
} |
1147 |
|
1148 |
String Engine::DiskStreamBufferFillBytes() { |
1149 |
return pDiskThread->GetBufferFillBytes(); |
1150 |
} |
1151 |
|
1152 |
String Engine::DiskStreamBufferFillPercentage() { |
1153 |
return pDiskThread->GetBufferFillPercentage(); |
1154 |
} |
1155 |
|
1156 |
String Engine::EngineName() { |
1157 |
return "GigEngine"; |
1158 |
} |
1159 |
|
1160 |
String Engine::InstrumentFileName() { |
1161 |
return InstrumentFile; |
1162 |
} |
1163 |
|
1164 |
int Engine::InstrumentIndex() { |
1165 |
return InstrumentIdx; |
1166 |
} |
1167 |
|
1168 |
int Engine::InstrumentStatus() { |
1169 |
return InstrumentStat; |
1170 |
} |
1171 |
|
1172 |
String Engine::Description() { |
1173 |
return "Gigasampler Engine"; |
1174 |
} |
1175 |
|
1176 |
String Engine::Version() { |
1177 |
String s = "$Revision: 1.21 $"; |
1178 |
return s.substr(11, s.size() - 13); // cut dollar signs, spaces and CVS macro keyword |
1179 |
} |
1180 |
|
1181 |
}} // namespace LinuxSampler::gig |