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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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* Copyright (C) 2005 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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#include "EngineChannel.h" |
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namespace LinuxSampler { namespace gig { |
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EngineChannel::EngineChannel() { |
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pMIDIKeyInfo = new midi_key_info_t[128]; |
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pEngine = NULL; |
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pInstrument = NULL; |
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pEvents = NULL; // we allocate when we retrieve the right Engine object |
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pCCEvents = NULL; // we allocate when we retrieve the right Engine object |
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pEventQueue = new RingBuffer<Event>(MAX_EVENTS_PER_FRAGMENT, 0); |
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pActiveKeys = new Pool<uint>(128); |
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for (uint i = 0; i < 128; i++) { |
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pMIDIKeyInfo[i].pActiveVoices = NULL; // we allocate when we retrieve the right Engine object |
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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 = NULL; // we allocate when we retrieve the right Engine object |
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pMIDIKeyInfo[i].RoundRobinIndex = 0; |
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} |
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for (uint i = 0; i < Event::destination_count; i++) { |
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pSynthesisEvents[i] = NULL; // we allocate when we retrieve the right Engine object |
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} |
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InstrumentIdx = -1; |
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InstrumentStat = -1; |
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AudioDeviceChannelLeft = -1; |
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AudioDeviceChannelRight = -1; |
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} |
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EngineChannel::~EngineChannel() { |
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DisconnectAudioOutputDevice(); |
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if (pInstrument) Engine::instruments.HandBack(pInstrument, this); |
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if (pEventQueue) delete pEventQueue; |
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if (pActiveKeys) delete pActiveKeys; |
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if (pMIDIKeyInfo) delete[] pMIDIKeyInfo; |
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} |
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/** |
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* This method is not thread safe! |
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*/ |
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void EngineChannel::ResetInternal() { |
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Pitch = 0; |
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SustainPedal = false; |
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GlobalVolume = 1.0; |
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GlobalPanLeft = 1.0f; |
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GlobalPanRight = 1.0f; |
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CurrentKeyDimension = 0; |
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// set all MIDI controller values to zero |
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memset(ControllerTable, 0x00, 128); |
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// reset key info |
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for (uint i = 0; i < 128; i++) { |
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if (pMIDIKeyInfo[i].pActiveVoices) |
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pMIDIKeyInfo[i].pActiveVoices->clear(); |
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if (pMIDIKeyInfo[i].pEvents) |
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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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// reset all key groups |
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std::map<uint,uint*>::iterator iter = ActiveKeyGroups.begin(); |
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for (; iter != ActiveKeyGroups.end(); iter++) iter->second = NULL; |
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// free all active keys |
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pActiveKeys->clear(); |
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// delete all input events |
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pEventQueue->init(); |
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if (pEngine) pEngine->ResetInternal(); |
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} |
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LinuxSampler::Engine* EngineChannel::GetEngine() { |
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return pEngine; |
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} |
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/** |
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* More or less a workaround to set the instrument name, index and load |
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* status variable to zero percent immediately, that is without blocking |
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* the calling thread. It might be used in future for other preparations |
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* as well though. |
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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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* @see LoadInstrument() |
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*/ |
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void EngineChannel::PrepareLoadInstrument(const char* FileName, uint Instrument) { |
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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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/** |
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* Load an instrument from a .gig file. PrepareLoadInstrument() has to |
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* be called first to provide the information which instrument to load. |
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* This method will then actually start to load the instrument and block |
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* the calling thread until loading was completed. |
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* |
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* @returns detailed description of the method call result |
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* @see PrepareLoadInstrument() |
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*/ |
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void EngineChannel::LoadInstrument() { |
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if (pEngine) pEngine->DisableAndLock(); |
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ResetInternal(); |
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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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Engine::instruments.HandBack(pInstrument, this); |
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} |
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// delete all key groups |
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ActiveKeyGroups.clear(); |
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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 = InstrumentFile; |
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instrid.iInstrument = InstrumentIdx; |
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pInstrument = Engine::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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// 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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InstrumentIdxName = pInstrument->pInfo->Name; |
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InstrumentStat = 100; |
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// inform audio driver for the need of two channels |
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try { |
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if (pEngine && pEngine->pAudioOutputDevice) |
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pEngine->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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if (pEngine) pEngine->Enable(); |
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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 EngineChannel::ResourceToBeUpdated(::gig::Instrument* pResource, void*& pUpdateArg) { |
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dmsg(3,("gig::Engine: Received instrument update message.\n")); |
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if (pEngine) pEngine->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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* 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 EngineChannel::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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if (pEngine) pEngine->Enable(); |
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} |
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void EngineChannel::Connect(AudioOutputDevice* pAudioOut) { |
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if (pEngine) { |
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if (pEngine->pAudioOutputDevice == pAudioOut) return; |
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DisconnectAudioOutputDevice(); |
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} |
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pEngine = Engine::AcquireEngine(this, pAudioOut); |
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ResetInternal(); |
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pEvents = new RTList<Event>(pEngine->pEventPool); |
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pCCEvents = new RTList<Event>(pEngine->pEventPool); |
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for (uint i = 0; i < Event::destination_count; i++) { |
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pSynthesisEvents[i] = new RTList<Event>(pEngine->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>(pEngine->pVoicePool); |
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pMIDIKeyInfo[i].pEvents = new RTList<Event>(pEngine->pEventPool); |
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} |
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AudioDeviceChannelLeft = 0; |
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AudioDeviceChannelRight = 1; |
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pOutputLeft = pAudioOut->Channel(0)->Buffer(); |
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pOutputRight = pAudioOut->Channel(1)->Buffer(); |
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} |
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void EngineChannel::DisconnectAudioOutputDevice() { |
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if (pEngine) { // if clause to prevent disconnect loops |
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ResetInternal(); |
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if (pEvents) { |
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delete pEvents; |
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pEvents = NULL; |
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} |
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if (pCCEvents) { |
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delete pCCEvents; |
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pCCEvents = NULL; |
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} |
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for (uint i = 0; i < 128; i++) { |
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if (pMIDIKeyInfo[i].pActiveVoices) { |
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delete pMIDIKeyInfo[i].pActiveVoices; |
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pMIDIKeyInfo[i].pActiveVoices = NULL; |
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} |
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if (pMIDIKeyInfo[i].pEvents) { |
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delete pMIDIKeyInfo[i].pEvents; |
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pMIDIKeyInfo[i].pEvents = NULL; |
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} |
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} |
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for (uint i = 0; i < Event::destination_count; i++) { |
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if (pSynthesisEvents[i]) { |
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delete pSynthesisEvents[i]; |
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pSynthesisEvents[i] = NULL; |
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} |
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} |
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Engine* oldEngine = pEngine; |
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AudioOutputDevice* oldAudioDevice = pEngine->pAudioOutputDevice; |
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pEngine = NULL; |
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Engine::FreeEngine(this, oldAudioDevice); |
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AudioDeviceChannelLeft = -1; |
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AudioDeviceChannelRight = -1; |
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} |
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} |
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void EngineChannel::SetOutputChannel(uint EngineAudioChannel, uint AudioDeviceChannel) { |
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if (!pEngine || !pEngine->pAudioOutputDevice) throw AudioOutputException("No audio output device connected yet."); |
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AudioChannel* pChannel = pEngine->pAudioOutputDevice->Channel(AudioDeviceChannel); |
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if (!pChannel) throw AudioOutputException("Invalid audio output device channel " + ToString(AudioDeviceChannel)); |
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switch (EngineAudioChannel) { |
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case 0: // left output channel |
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pOutputLeft = pChannel->Buffer(); |
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AudioDeviceChannelLeft = AudioDeviceChannel; |
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break; |
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case 1: // right output channel |
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pOutputRight = pChannel->Buffer(); |
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AudioDeviceChannelRight = AudioDeviceChannel; |
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break; |
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default: |
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throw AudioOutputException("Invalid engine audio channel " + ToString(EngineAudioChannel)); |
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} |
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} |
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int EngineChannel::OutputChannel(uint EngineAudioChannel) { |
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switch (EngineAudioChannel) { |
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case 0: // left channel |
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return AudioDeviceChannelLeft; |
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case 1: // right channel |
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return AudioDeviceChannelRight; |
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default: |
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throw AudioOutputException("Invalid engine audio channel " + ToString(EngineAudioChannel)); |
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} |
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} |
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/** |
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* Will be called by the MIDIIn Thread to let the audio thread trigger a new |
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* voice for the given key. |
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* |
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* @param Key - MIDI key number of the triggered key |
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* @param Velocity - MIDI velocity value of the triggered key |
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*/ |
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void EngineChannel::SendNoteOn(uint8_t Key, uint8_t Velocity) { |
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if (pEngine) { |
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Event event = pEngine->pEventGenerator->CreateEvent(); |
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event.Type = Event::type_note_on; |
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event.Param.Note.Key = Key; |
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event.Param.Note.Velocity = Velocity; |
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event.pEngineChannel = this; |
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if (this->pEventQueue->write_space() > 0) this->pEventQueue->push(&event); |
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else dmsg(1,("EngineChannel: Input event queue full!")); |
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} |
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} |
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/** |
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* Will be called by the MIDIIn Thread to signal the audio thread to release |
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* voice(s) on the given key. |
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* |
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* @param Key - MIDI key number of the released key |
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* @param Velocity - MIDI release velocity value of the released key |
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*/ |
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void EngineChannel::SendNoteOff(uint8_t Key, uint8_t Velocity) { |
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if (pEngine) { |
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Event event = pEngine->pEventGenerator->CreateEvent(); |
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event.Type = Event::type_note_off; |
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event.Param.Note.Key = Key; |
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event.Param.Note.Velocity = Velocity; |
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event.pEngineChannel = this; |
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if (this->pEventQueue->write_space() > 0) this->pEventQueue->push(&event); |
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else dmsg(1,("EngineChannel: Input event queue full!")); |
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} |
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} |
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/** |
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* Will be called by the MIDIIn Thread to signal the audio thread to change |
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* the pitch value for all voices. |
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* |
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* @param Pitch - MIDI pitch value (-8192 ... +8191) |
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*/ |
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void EngineChannel::SendPitchbend(int Pitch) { |
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if (pEngine) { |
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schoenebeck |
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Event event = pEngine->pEventGenerator->CreateEvent(); |
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event.Type = Event::type_pitchbend; |
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event.Param.Pitch.Pitch = Pitch; |
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event.pEngineChannel = this; |
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schoenebeck |
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if (this->pEventQueue->write_space() > 0) this->pEventQueue->push(&event); |
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else dmsg(1,("EngineChannel: Input event queue full!")); |
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schoenebeck |
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} |
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} |
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/** |
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* Will be called by the MIDIIn Thread to signal the audio thread that a |
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* continuous controller value has changed. |
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* |
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* @param Controller - MIDI controller number of the occured control change |
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* @param Value - value of the control change |
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*/ |
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void EngineChannel::SendControlChange(uint8_t Controller, uint8_t Value) { |
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if (pEngine) { |
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Event event = pEngine->pEventGenerator->CreateEvent(); |
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event.Type = Event::type_control_change; |
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event.Param.CC.Controller = Controller; |
367 |
|
|
event.Param.CC.Value = Value; |
368 |
schoenebeck |
412 |
event.pEngineChannel = this; |
369 |
schoenebeck |
411 |
if (this->pEventQueue->write_space() > 0) this->pEventQueue->push(&event); |
370 |
schoenebeck |
412 |
else dmsg(1,("EngineChannel: Input event queue full!")); |
371 |
schoenebeck |
411 |
} |
372 |
|
|
} |
373 |
|
|
|
374 |
schoenebeck |
460 |
void EngineChannel::ClearEventLists() { |
375 |
|
|
pEvents->clear(); |
376 |
|
|
pCCEvents->clear(); |
377 |
|
|
for (uint i = 0; i < Event::destination_count; i++) { |
378 |
|
|
pSynthesisEvents[i]->clear(); |
379 |
|
|
} |
380 |
|
|
// empty MIDI key specific event lists |
381 |
|
|
{ |
382 |
|
|
RTList<uint>::Iterator iuiKey = pActiveKeys->first(); |
383 |
|
|
RTList<uint>::Iterator end = pActiveKeys->end(); |
384 |
|
|
for(; iuiKey != end; ++iuiKey) { |
385 |
|
|
pMIDIKeyInfo[*iuiKey].pEvents->clear(); // free all events on the key |
386 |
|
|
} |
387 |
|
|
} |
388 |
|
|
} |
389 |
|
|
|
390 |
|
|
/** |
391 |
|
|
* Copy all events from the engine channel's input event queue buffer to |
392 |
|
|
* the internal event list. This will be done at the beginning of each |
393 |
|
|
* audio cycle (that is each RenderAudio() call) to distinguish all |
394 |
|
|
* events which have to be processed in the current audio cycle. Each |
395 |
|
|
* EngineChannel has it's own input event queue for the common channel |
396 |
|
|
* specific events (like NoteOn, NoteOff and ControlChange events). |
397 |
|
|
* Beside that, the engine also has a input event queue for global |
398 |
|
|
* events (usually SysEx messages). |
399 |
|
|
* |
400 |
|
|
* @param Samples - number of sample points to be processed in the |
401 |
|
|
* current audio cycle |
402 |
|
|
*/ |
403 |
|
|
void EngineChannel::ImportEvents(uint Samples) { |
404 |
|
|
RingBuffer<Event>::NonVolatileReader eventQueueReader = pEventQueue->get_non_volatile_reader(); |
405 |
|
|
Event* pEvent; |
406 |
|
|
while (true) { |
407 |
|
|
// get next event from input event queue |
408 |
|
|
if (!(pEvent = eventQueueReader.pop())) break; |
409 |
|
|
// if younger event reached, ignore that and all subsequent ones for now |
410 |
|
|
if (pEvent->FragmentPos() >= Samples) { |
411 |
|
|
eventQueueReader--; |
412 |
|
|
dmsg(2,("Younger Event, pos=%d ,Samples=%d!\n",pEvent->FragmentPos(),Samples)); |
413 |
|
|
pEvent->ResetFragmentPos(); |
414 |
|
|
break; |
415 |
|
|
} |
416 |
|
|
// copy event to internal event list |
417 |
|
|
if (pEvents->poolIsEmpty()) { |
418 |
|
|
dmsg(1,("Event pool emtpy!\n")); |
419 |
|
|
break; |
420 |
|
|
} |
421 |
|
|
*pEvents->allocAppend() = *pEvent; |
422 |
|
|
} |
423 |
|
|
eventQueueReader.free(); // free all copied events from input queue |
424 |
|
|
} |
425 |
|
|
|
426 |
schoenebeck |
411 |
float EngineChannel::Volume() { |
427 |
|
|
return GlobalVolume; |
428 |
|
|
} |
429 |
|
|
|
430 |
|
|
void EngineChannel::Volume(float f) { |
431 |
|
|
GlobalVolume = f; |
432 |
|
|
} |
433 |
|
|
|
434 |
|
|
uint EngineChannel::Channels() { |
435 |
|
|
return 2; |
436 |
|
|
} |
437 |
|
|
|
438 |
|
|
String EngineChannel::InstrumentFileName() { |
439 |
|
|
return InstrumentFile; |
440 |
|
|
} |
441 |
|
|
|
442 |
|
|
String EngineChannel::InstrumentName() { |
443 |
|
|
return InstrumentIdxName; |
444 |
|
|
} |
445 |
|
|
|
446 |
|
|
int EngineChannel::InstrumentIndex() { |
447 |
|
|
return InstrumentIdx; |
448 |
|
|
} |
449 |
|
|
|
450 |
|
|
int EngineChannel::InstrumentStatus() { |
451 |
|
|
return InstrumentStat; |
452 |
persson |
438 |
} |
453 |
schoenebeck |
411 |
|
454 |
|
|
}} // namespace LinuxSampler::gig |