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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) 2011 - 2012 Grigor Iliev * |
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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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#ifndef __LS_SIGNALUNITRACK_H__ |
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#define __LS_SIGNALUNITRACK_H__ |
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#include "Event.h" |
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#include "SignalUnit.h" |
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#include "../../common/Pool.h" |
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namespace LinuxSampler { |
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class EqSupport { |
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private: |
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int BandCount; |
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int* GainIdxs; ///< the indices of the gain controls |
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int* FreqIdxs; ///< the indices of the frequency controls |
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int* BandwidthIdxs; ///< the indices of the bandwidth controls |
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Effect* pEffect; |
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Effect* pEffect2; // If the effect is mono we'll need two effects |
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inline float check(optional<float> minimum, optional<float> maximum, float value) { |
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if (minimum) { |
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float min = *minimum; |
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if (value < min) value = min; |
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} |
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if (maximum) { |
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float max = *maximum; |
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if (value > max) value = max; |
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} |
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return value; |
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} |
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public: |
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EqSupport(); |
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~EqSupport(); |
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void PrintInfo(); |
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/** |
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* Searches for know EQ effects and create one if the search succeed. |
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* If the initialization is successful and EQ effect is selected, |
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* HasSupport() returns true; |
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*/ |
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void Install(); |
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void Uninstall(); |
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/** Returns true if an EQ is created and is ready for use. */ |
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bool HasSupport() { return pEffect != NULL; } |
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/** Reset the gains of all bands to 0dB. */ |
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void Reset() { |
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if (!HasSupport()) return; |
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for (int i = 0; i < BandCount; i++) { |
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pEffect->InputControl(GainIdxs[i])->SetValue(0); // 0dB |
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if (pEffect2 != NULL) pEffect2->InputControl(GainIdxs[i])->SetValue(0); // 0dB |
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} |
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} |
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void InitEffect(AudioOutputDevice* pDevice) { |
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if (pEffect != NULL) pEffect->InitEffect(pDevice); |
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if (pEffect2 != NULL) pEffect2->InitEffect(pDevice); |
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} |
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int GetBandCount() { return BandCount; } |
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void SetGain(int band, float gain); |
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void SetFreq(int band, float freq); |
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void SetBandwidth(int band, float octaves); |
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AudioChannel* GetInChannelLeft() { |
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return pEffect->InputChannel(0); |
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} |
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AudioChannel* GetInChannelRight() { |
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return pEffect2 != NULL ? pEffect2->InputChannel(0) : pEffect->InputChannel(1); |
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} |
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AudioChannel* GetOutChannelLeft() { |
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return pEffect->OutputChannel(0); |
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} |
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AudioChannel* GetOutChannelRight() { |
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return pEffect2 != NULL ? pEffect2->OutputChannel(0) : pEffect->OutputChannel(1); |
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} |
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void RenderAudio(uint Samples) { |
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pEffect->RenderAudio(Samples); |
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if (pEffect2 != NULL) pEffect2->RenderAudio(Samples); |
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} |
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}; |
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class SignalUnitRack { |
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protected: |
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uint CurrentStep; // The current time step |
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bool bHasEq, releaseStageEntered; |
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public: |
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FixedArray<SignalUnit*> Units; // A list of all signal units in this rack |
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/** |
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* @param maxUnitCount We are using fixed size array because of the real-time safe requirements. |
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*/ |
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SignalUnitRack(int maxUnitCount): CurrentStep(0), bHasEq(false), |
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releaseStageEntered(false), Units(maxUnitCount) { } |
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uint GetCurrentStep() { return CurrentStep; } |
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virtual EndpointSignalUnit* GetEndpointUnit() = 0; |
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virtual void EnterFadeOutStage() = 0; |
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virtual void EnterFadeOutStage(int maxFadeOutSteps) = 0; |
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/** |
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* Will be called to increment the time with one sample point. |
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* Each unit should recalculate its current level on every call of this function. |
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*/ |
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virtual void Increment() { |
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CurrentStep++; |
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for (int i = 0; i < Units.size(); i++) { |
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Units[i]->Increment(); |
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} |
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} |
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virtual void ProcessCCEvent(RTList<Event>::Iterator& itEvent) { |
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if ( !(itEvent->Type == Event::type_control_change && itEvent->Param.CC.Controller) ) return; |
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for (int i = 0; i < Units.size(); i++) { |
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Units[i]->ProcessCCEvent(itEvent->Param.CC.Controller, itEvent->Param.CC.Value); |
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} |
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} |
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/** Initializes and triggers the rack. */ |
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virtual void Trigger() { |
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releaseStageEntered = false; |
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CurrentStep = 0; |
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for (int i = 0; i < Units.size(); i++) { |
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Units[i]->Trigger(); |
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} |
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} |
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/** |
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* When the rack belongs to a voice, this method is |
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* called when the voice enter the release stage. |
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*/ |
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virtual void EnterReleaseStage() { |
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releaseStageEntered = true; |
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for (int i = 0; i < Units.size(); i++) { |
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Units[i]->EnterReleaseStage(); |
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} |
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} |
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bool isReleaseStageEntered() { return releaseStageEntered; } |
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/** |
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* When the rack belongs to a voice, this method is |
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* called when the voice is of type which ignore note off. |
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*/ |
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virtual void CancelRelease() { |
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for (int i = 0; i < Units.size(); i++) { |
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Units[i]->CancelRelease(); |
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} |
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} |
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/** |
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* Determines whether an equalization is applied to the voice. |
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* Used for optimization. |
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*/ |
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bool HasEq() { return bHasEq; } |
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virtual void UpdateEqSettings(EqSupport* pEqSupport) = 0; |
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}; |
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} // namespace LinuxSampler |
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#endif /* __LS_SIGNALUNITRACK_H__ */ |