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* LinuxSampler - modular, streaming capable sampler * |
* LinuxSampler - modular, streaming capable sampler * |
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* * |
* * |
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* Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck * |
* 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 * |
* 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 * |
* it under the terms of the GNU General Public License as published by * |
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#include "InstrumentResourceManager.h" |
#include "InstrumentResourceManager.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 GIG_RESOURCE_MANAGER_DEFAULT_MAX_SAMPLES_PER_CYCLE 128 |
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namespace LinuxSampler { namespace gig { |
namespace LinuxSampler { namespace gig { |
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::gig::Instrument* InstrumentResourceManager::Create(instrument_id_t Key, InstrumentConsumer* pConsumer, void*& pArg) { |
::gig::Instrument* InstrumentResourceManager::Create(instrument_id_t Key, InstrumentConsumer* pConsumer, void*& pArg) { |
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dmsg(1,("Caching initial samples...")); |
dmsg(1,("Caching initial samples...")); |
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::gig::Region* pRgn = pInstrument->GetFirstRegion(); |
::gig::Region* pRgn = pInstrument->GetFirstRegion(); |
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while (pRgn) { |
while (pRgn) { |
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if (!pRgn->GetSample()->GetCache().Size) { |
if (pRgn->GetSample() && !pRgn->GetSample()->GetCache().Size) { |
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dmsg(2,("C")); |
dmsg(2,("C")); |
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CacheInitialSamples(pRgn->GetSample(), dynamic_cast<gig::Engine*>(pConsumer)); |
CacheInitialSamples(pRgn->GetSample(), dynamic_cast<gig::EngineChannel*>(pConsumer)); |
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} |
} |
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for (uint i = 0; i < pRgn->DimensionRegions; i++) { |
for (uint i = 0; i < pRgn->DimensionRegions; i++) { |
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CacheInitialSamples(pRgn->pDimensionRegions[i]->pSample, dynamic_cast<gig::Engine*>(pConsumer)); |
CacheInitialSamples(pRgn->pDimensionRegions[i]->pSample, dynamic_cast<gig::EngineChannel*>(pConsumer)); |
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} |
} |
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pRgn = pInstrument->GetNextRegion(); |
pRgn = pInstrument->GetNextRegion(); |
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instr_entry_t* pEntry = new instr_entry_t; |
instr_entry_t* pEntry = new instr_entry_t; |
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pEntry->iInstrument = Key.iInstrument; |
pEntry->iInstrument = Key.iInstrument; |
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pEntry->pGig = pGig; |
pEntry->pGig = pGig; |
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// and this to check if we need to reallocate for a engine with higher value of 'MaxSamplesPerSecond' |
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pEntry->MaxSamplesPerCycle = dynamic_cast<gig::Engine*>(pConsumer)->pAudioOutputDevice->MaxSamplesPerCycle(); |
gig::EngineChannel* pEngineChannel = dynamic_cast<gig::EngineChannel*>(pConsumer); |
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// and we save this to check if we need to reallocate for a engine with higher value of 'MaxSamplesPerSecond' |
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pEntry->MaxSamplesPerCycle = |
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(pEngineChannel->GetEngine()) ? dynamic_cast<gig::Engine*>(pEngineChannel->GetEngine())->pAudioOutputDevice->MaxSamplesPerCycle() |
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: GIG_RESOURCE_MANAGER_DEFAULT_MAX_SAMPLES_PER_CYCLE; |
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pArg = pEntry; |
pArg = pEntry; |
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return pInstrument; |
return pInstrument; |
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void InstrumentResourceManager::OnBorrow(::gig::Instrument* pResource, InstrumentConsumer* pConsumer, void*& pArg) { |
void InstrumentResourceManager::OnBorrow(::gig::Instrument* pResource, InstrumentConsumer* pConsumer, void*& pArg) { |
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instr_entry_t* pEntry = (instr_entry_t*) pArg; |
instr_entry_t* pEntry = (instr_entry_t*) pArg; |
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if (pEntry->MaxSamplesPerCycle < dynamic_cast<gig::Engine*>(pConsumer)->pAudioOutputDevice->MaxSamplesPerCycle()) { |
gig::EngineChannel* pEngineChannel = dynamic_cast<gig::EngineChannel*>(pConsumer); |
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uint maxSamplesPerCycle = |
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(pEngineChannel->GetEngine()) ? dynamic_cast<gig::Engine*>(pEngineChannel->GetEngine())->pAudioOutputDevice->MaxSamplesPerCycle() |
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: GIG_RESOURCE_MANAGER_DEFAULT_MAX_SAMPLES_PER_CYCLE; |
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if (pEntry->MaxSamplesPerCycle < maxSamplesPerCycle) { |
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Update(pResource, pConsumer); |
Update(pResource, pConsumer); |
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} |
} |
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} |
} |
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* samples is needed to compensate disk reading latency. |
* 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 |
* @param pSample - points to the sample to be cached |
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* @param pEngine - pointer to Gig Engine which caused this call |
* @param pEngineChannel - pointer to Gig Engine Channel which caused this call |
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*/ |
*/ |
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void InstrumentResourceManager::CacheInitialSamples(::gig::Sample* pSample, gig::Engine* pEngine) { |
void InstrumentResourceManager::CacheInitialSamples(::gig::Sample* pSample, gig::EngineChannel* pEngineChannel) { |
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if (!pSample || pSample->GetCache().Size) return; |
if (!pSample) { |
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dmsg(1,("gig::InstrumentResourceManager: Warning, skipping sample (pSample == NULL)\n")); |
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return; |
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} |
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if (!pSample->SamplesTotal) return; // skip zero size samples |
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if (pSample->SamplesTotal <= NUM_RAM_PRELOAD_SAMPLES) { |
if (pSample->SamplesTotal <= NUM_RAM_PRELOAD_SAMPLES) { |
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// Sample is too short for disk streaming, so we load the whole |
// Sample is too short for disk streaming, so we load the whole |
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// sample into RAM and place 'pAudioIO->FragmentSize << MAX_PITCH' |
// sample into RAM and place 'pAudioIO->FragmentSize << MAX_PITCH' |
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// number of '0' samples (silence samples) behind the official buffer |
// 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 |
// border, to allow the interpolator do it's work even at the end of |
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// the sample. |
// the sample. |
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::gig::buffer_t buf = pSample->LoadSampleDataWithNullSamplesExtension((pEngine->pAudioOutputDevice->MaxSamplesPerCycle() << MAX_PITCH) + 3); |
const uint maxSamplesPerCycle = |
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dmsg(4,("Cached %d Bytes, %d silence bytes.\n", buf.Size, buf.NullExtensionSize)); |
(pEngineChannel->GetEngine()) ? dynamic_cast<gig::Engine*>(pEngineChannel->GetEngine())->pAudioOutputDevice->MaxSamplesPerCycle() |
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: GIG_RESOURCE_MANAGER_DEFAULT_MAX_SAMPLES_PER_CYCLE; |
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const uint neededSilenceSamples = (maxSamplesPerCycle << MAX_PITCH) + 3; |
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const uint currentlyCachedSilenceSamples = pSample->GetCache().NullExtensionSize / pSample->FrameSize; |
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if (currentlyCachedSilenceSamples < neededSilenceSamples) { |
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dmsg(3,("Caching whole sample (sample name: \"%s\", sample size: %d)\n", pSample->pInfo->Name.c_str(), pSample->SamplesTotal)); |
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::gig::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 NUM_RAM_PRELOAD_SAMPLES and stream the other sample points from disk |
else { // we only cache NUM_RAM_PRELOAD_SAMPLES and stream the other sample points from disk |
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pSample->LoadSampleData(NUM_RAM_PRELOAD_SAMPLES); |
if (!pSample->GetCache().Size) pSample->LoadSampleData(NUM_RAM_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; |
if (!pSample->GetCache().Size) std::cerr << "Unable to cache sample - maybe memory full!" << std::endl << std::flush; |