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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 - 2008 Christian Schoenebeck * |
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* Copyright (C) 2009 - 2012 Christian Schoenebeck and Grigor Iliev * |
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* * |
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* This library 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 library 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 library; 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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#ifndef __LS_INSTRUMENTMANAGERBASE_H__ |
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#define __LS_INSTRUMENTMANAGERBASE_H__ |
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#include "InstrumentManager.h" |
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#include "AbstractEngine.h" |
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#include "AbstractEngineChannel.h" |
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#include "../common/ResourceManager.h" |
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#include "../common/global_private.h" |
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#include "../drivers/audio/AudioOutputDeviceFactory.h" |
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// We need to know the maximum number of sample points which are going to |
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// be processed for each render cycle of the audio output driver, to know |
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// how much initial sample points we need to cache into RAM. If the given |
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// sampler channel does not have an audio output device assigned yet |
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// though, we simply use this default value. |
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#define RESOURCE_MANAGER_DEFAULT_MAX_SAMPLES_PER_CYCLE 128 |
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namespace LinuxSampler { |
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template <class F /* Instrument File */, class I /* Instrument */, class R /* Regions */, class S /*Sample */> |
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class InstrumentManagerBase : public InstrumentManager, public ResourceManager<InstrumentManager::instrument_id_t, I> { |
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public: |
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struct region_info_t { |
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int refCount; |
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F* file; |
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void* pArg; |
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region_info_t() { |
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refCount = 0; file = NULL; pArg = NULL; |
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} |
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}; |
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typedef ResourceConsumer<I> InstrumentConsumer; |
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InstrumentManagerBase() { } |
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virtual ~InstrumentManagerBase() { } |
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virtual InstrumentEditor* LaunchInstrumentEditor(instrument_id_t ID, void* pUserData = NULL) throw (InstrumentManagerException) { |
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throw InstrumentManagerException( |
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"Instrument editing is not supported for this instrument format" |
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); |
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} |
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virtual String GetInstrumentDataStructureName(instrument_id_t ID) { |
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throw InstrumentManagerException("Not implemented"); |
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} |
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virtual String GetInstrumentDataStructureVersion(instrument_id_t ID) { |
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throw InstrumentManagerException("Not implemented"); |
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} |
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/** |
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* Give back an instrument. This should be used instead of |
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* HandBack if there are some regions that are still in |
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* use. (When an instrument is changed, the voices currently |
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* playing are allowed to keep playing with the old instrument |
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* until note off arrives. New notes will use the new instrument.) |
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*/ |
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void HandBackInstrument ( |
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I* pResource, |
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InstrumentConsumer* pConsumer, |
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RTList<R*>* pRegionsInUse |
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) { |
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RegionInfoMutex.Lock(); |
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for (typename RTList<R*>::Iterator i = pRegionsInUse->first() ; i != pRegionsInUse->end() ; i++) { |
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RegionInfo[*i].refCount++; |
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SampleRefCount[(*i)->pSample]++; |
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} |
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this->HandBack(pResource, pConsumer, true); |
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RegionInfoMutex.Unlock(); |
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} |
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/** |
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* Give back a region that belongs to an instrument that |
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* was previously handed back. |
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*/ |
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virtual void HandBackRegion(R* pRegion) { |
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RegionInfoMutex.Lock(); |
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if (RegionInfo.find(pRegion) == RegionInfo.end()) { |
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std::cerr << "Handing back unknown region. This is a BUG!!!" << std::endl; |
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} |
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region_info_t& regInfo = RegionInfo[pRegion]; |
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int regionRefCount = --regInfo.refCount; |
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int sampleRefCount = --SampleRefCount[pRegion->pSample]; |
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if (regionRefCount == 0) { |
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S* pSample = pRegion->pSample; |
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DeleteRegionIfNotUsed(pRegion, ®Info); |
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if (sampleRefCount == 0) { |
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SampleRefCount.erase(pSample); |
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DeleteSampleIfNotUsed(pSample, ®Info); |
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} |
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RegionInfo.erase(pRegion); |
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} |
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RegionInfoMutex.Unlock(); |
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} |
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virtual InstrumentManager::mode_t GetMode(const InstrumentManager::instrument_id_t& ID) { |
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return static_cast<InstrumentManager::mode_t>(ResourceManager<instrument_id_t, I>::AvailabilityMode(ID)); |
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} |
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virtual void SetMode(const InstrumentManager::instrument_id_t& ID, InstrumentManager::mode_t Mode) { |
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dmsg(2,("InstrumentManagerBase: setting mode for %s (Index=%d) to %d\n",ID.FileName.c_str(),ID.Index,Mode)); |
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this->SetAvailabilityMode(ID, static_cast<typename ResourceManager<instrument_id_t, I>::mode_t>(Mode)); |
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} |
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protected: |
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// data stored as long as an instrument resource exists |
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struct instr_entry_t { |
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InstrumentManager::instrument_id_t ID; |
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F* pFile; |
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uint MaxSamplesPerCycle; ///< if some engine requests an already allocated instrument with a higher value, we have to reallocate the instrument |
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}; |
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/** |
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* Used by the implementing instrument manager descendents in case |
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* they don't have a reference to a sampler channel, which in turn |
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* provides a reference to an audio device which would actually |
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* define the maximum amount of sample points per audio render |
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* cycle. So in those missing cases (e.g. when MIDI instrument maps |
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* are created), this method will iterate through all already |
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* existing audio devices and return the biggest max. samples per |
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* cycle value of those audio devices. |
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* |
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* In case no audio device is currently created, this method will |
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* return a hard coded constant default value. |
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* |
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* Background: We need to know the maximum number of sample points |
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* which are going to be processed for each render cycle of the |
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* audio output driver, to know how many initial sample points we |
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* need to cache into RAM by the implementing instrument manager. |
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*/ |
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virtual uint DefaultMaxSamplesPerCycle() { |
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uint samples = 0; |
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std::map<uint, AudioOutputDevice*> devices = AudioOutputDeviceFactory::Devices(); |
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for (std::map<uint, AudioOutputDevice*>::iterator iter = devices.begin(); iter != devices.end(); ++iter) { |
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AudioOutputDevice* pDevice = iter->second; |
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if (pDevice->MaxSamplesPerCycle() > samples) |
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samples = pDevice->MaxSamplesPerCycle(); |
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} |
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return (samples != 0) ? samples : RESOURCE_MANAGER_DEFAULT_MAX_SAMPLES_PER_CYCLE; |
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} |
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uint GetMaxSamplesPerCycle(InstrumentConsumer* pConsumer) { |
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// try to resolve the audio device context |
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AbstractEngineChannel* pEngineChannel = dynamic_cast<AbstractEngineChannel*>(pConsumer); |
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AudioOutputDevice* pDevice = pEngineChannel ? pEngineChannel->GetAudioOutputDeviceSafe() : 0; |
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return pDevice ? pDevice->MaxSamplesPerCycle() : DefaultMaxSamplesPerCycle(); |
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} |
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Mutex RegionInfoMutex; ///< protects the RegionInfo and SampleRefCount maps from concurrent access by the instrument loader and disk threads |
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std::map< R*, region_info_t> RegionInfo; ///< contains dimension regions that are still in use but belong to released instrument |
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std::map< S*, int> SampleRefCount; ///< contains samples that are still in use but belong to a released instrument |
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virtual void DeleteRegionIfNotUsed(R* pRegion, region_info_t* pRegInfo) = 0; |
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virtual void DeleteSampleIfNotUsed(S* pSample, region_info_t* pRegInfo) = 0; |
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void SetKeyBindings(uint8_t* bindingsArray, int low, int high, int undefined = -1) { |
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if (low == undefined || high == undefined) return; |
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if (low < 0 || low > 127 || high < 0 || high > 127 || low > high) { |
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std::cerr << "Invalid key range: " << low << " - " << high << std::endl; |
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return; |
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} |
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for (int i = low; i <= high; i++) bindingsArray[i] = 1; |
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} |
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/** |
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* Caches a certain size at the beginning of the given sample in RAM. If the |
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* sample is very short, the whole sample will be loaded into RAM and thus |
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* no disk streaming is needed for this sample. Caching an initial part of |
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* samples is needed to compensate disk reading latency. |
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* |
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* @param pSample - points to the sample to be cached |
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* @param maxSamplesPerCycle - max samples per cycle |
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*/ |
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void CacheInitialSamples(S* pSample, uint maxSamplesPerCycle) { |
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if (!pSample) { |
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dmsg(4,("InstrumentManagerBase: Skipping sample (pSample == NULL)\n")); |
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return; |
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} |
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if (!pSample->GetTotalFrameCount()) return; // skip zero size samples |
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if (pSample->GetTotalFrameCount() <= CONFIG_PRELOAD_SAMPLES) { |
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// Sample is too short for disk streaming, so we load the whole |
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// sample into RAM and place 'pAudioIO->FragmentSize << CONFIG_MAX_PITCH' |
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// number of '0' samples (silence samples) behind the official buffer |
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// border, to allow the interpolator do it's work even at the end of |
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// the sample. |
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const uint neededSilenceSamples = (maxSamplesPerCycle << CONFIG_MAX_PITCH) + 3; |
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const uint currentlyCachedSilenceSamples = pSample->GetCache().NullExtensionSize / pSample->GetFrameSize(); |
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if (currentlyCachedSilenceSamples < neededSilenceSamples) { |
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dmsg(3,("Caching whole sample (sample name: \"%s\", sample size: %d)\n", pSample->GetName().c_str(), pSample->GetTotalFrameCount())); |
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typename S::buffer_t buf = pSample->LoadSampleDataWithNullSamplesExtension(neededSilenceSamples); |
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dmsg(4,("Cached %d Bytes, %d silence bytes.\n", buf.Size, buf.NullExtensionSize)); |
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} |
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} |
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else { // we only cache CONFIG_PRELOAD_SAMPLES and stream the other sample points from disk |
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if (!pSample->GetCache().Size) pSample->LoadSampleData(CONFIG_PRELOAD_SAMPLES); |
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} |
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if (!pSample->GetCache().Size) std::cerr << "Unable to cache sample - maybe memory full!" << std::endl << std::flush; |
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} |
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// implementation of derived abstract methods from 'InstrumentManager' |
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std::vector<instrument_id_t> Instruments() { |
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return ResourceManager<InstrumentManager::instrument_id_t, I>::Entries(); |
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} |
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// implementation of derived abstract methods from 'ResourceManager' |
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void OnBorrow(I* pResource, InstrumentConsumer* pConsumer, void*& pArg) { |
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instr_entry_t* pEntry = static_cast<instr_entry_t*>(pArg); |
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uint maxSamplesPerCycle = GetMaxSamplesPerCycle(pConsumer); |
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if (pEntry->MaxSamplesPerCycle < maxSamplesPerCycle) { |
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dmsg(1,("Completely reloading instrument due to insufficient precached samples ...\n")); |
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this->Update(pResource, pConsumer); |
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} |
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} |
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}; |
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} // namespace LinuxSampler |
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#endif // __LS_INSTRUMENTMANAGERBASE_H__ |