plonk_DelayFormCombDecay.h

/*
 -------------------------------------------------------------------------------
 This file is part of the Plink, Plonk, Plank libraries
  by Martin Robinson
 
 http://code.google.com/p/pl-nk/
 
 Copyright University of the West of England, Bristol 2011-14
 All rights reserved.
 
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 * Redistributions in binary form must reproduce the above copyright
   notice, this list of conditions and the following disclaimer in the
   documentation and/or other materials provided with the distribution.
 * Neither the name of University of the West of England, Bristol nor 
   the names of its contributors may be used to endorse or promote products
   derived from this software without specific prior written permission.
 
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 ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 
 DISCLAIMED. IN NO EVENT SHALL UNIVERSITY OF THE WEST OF ENGLAND, BRISTOL BE 
 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 
 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE 
 GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 
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 This software makes use of third party libraries. For more information see:
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 -------------------------------------------------------------------------------
 */

#ifndef PLONK_DELAYFORMCOMBDECAY_H
#define PLONK_DELAYFORMCOMBDECAY_H

#include "../channel/plonk_ChannelInternalCore.h"
#include "plonk_DelayForwardDeclarations.h"


template<class SampleType, Interp::TypeCode InterpTypeCode>
class DelayFormCombDecay
:   public DelayFormCombFB<SampleType>
{
public:
    typedef DelayFormCombFB<SampleType>                             Base;

    enum InParams
    {
        DurationIn,
        DecayIn,
        NumInParams
    };
            
    typedef typename Base::Data                                     Data;
    typedef typename Data::DelayState                               DelayState;
    typedef DelayFormCombDecay                                      FormType;
    
    typedef SampleType                                              SampleDataType;
    typedef Delay2ParamChannelInternal<FormType>                    DelayInternal;
    typedef ChannelBase<SampleType>                                 ChannelType;
    typedef ChannelInternal<SampleType,Data>                        Internal;
    typedef UnitBase<SampleType>                                    UnitType;
    typedef InputDictionary                                         Inputs;
    typedef NumericalArray<SampleType>                              Buffer;
    
    typedef typename TypeUtility<SampleType>::IndexType             Param1Type;  
    typedef Param1Type                                              DurationType;    
    typedef UnitBase<DurationType>                                  DurationUnitType;
    
    typedef typename TypeUtility<SampleType>::IndexType             Param2Type;  
    typedef Param2Type                                              DecayType;    
    typedef UnitBase<DecayType>                                     DecayUnitType;
    
    typedef InterpSelect<SampleType,DurationType,InterpTypeCode>    InterpSelectType;
    typedef typename InterpSelectType::InterpType                   InterpType;
    typedef typename InterpType::ExtensionBuffer                    ExtensionBuffer;
    
    static inline IntArray getInputKeys() throw()
    {
        const IntArray keys (IOKey::Generic, IOKey::Duration, IOKey::Decay);
        return keys;
    }    
        
    static inline void param1Process (Data& data, DelayState& state, DurationType const& duration) throw()
    {
        if (state.paramsIn[DurationIn] != duration)
        {
            state.paramsIn[DurationIn] = duration;
            state.paramsOut[Base::DurationInSamplesOut] = DurationType (duration * data.base.sampleRate);
            plonk_assert (state.paramsOut[Base::DurationInSamplesOut] >= 0 && 
                          state.paramsOut[Base::DurationInSamplesOut] <= state.bufferLengthIndex);
            state.paramsOut[Base::FeedbackOut] = plonk::decayFeedback (state.paramsIn[DurationIn], state.paramsIn[DecayIn]);
        }
    }

    static inline void param2Ignore (Data&, DelayState&, DecayType const&) throw() { }
    static inline void param2Process (Data&, DelayState& state, DecayType const& decay) throw()
    {                        
        if (state.paramsIn[DecayIn] != decay)
        {
            state.paramsIn[DecayIn] = decay;
            state.paramsOut[Base::FeedbackOut] = plonk::decayFeedback (state.paramsIn[DurationIn], decay);
        }
    }
        
    static inline UnitType ar (UnitType const& input,
                               DurationUnitType const& duration,
                               DecayUnitType const& decay,
                               const DurationType maximumDuration,
                               UnitType const& mul,
                               UnitType const& add,
                               BlockSize const& preferredBlockSize,
                               SampleRate const& preferredSampleRate) throw()
    {             
        const Data data = { { -1.0, -1.0 }, maximumDuration, 0 };
        
        const int numInputChannels = input.getNumChannels();
        const int numDurationChannels = duration.getNumChannels();
        const int numDecayChannels = decay.getNumChannels();
        const int numChannels = plonk::max (numInputChannels, numDurationChannels, numDecayChannels);
        
        UnitType mainUnit = UnitType::emptyChannels (numChannels);
        
        for (int i = 0; i < numChannels; ++i)
        {
            Inputs inputs;
            inputs.put (IOKey::Generic, input[i]);
            inputs.put (IOKey::Duration, duration[i]);
            inputs.put (IOKey::Decay, decay[i]);
            
            UnitType unit = UnitType::template proxiesFromInputs<DelayInternal> (inputs, 
                                                                                data, 
                                                                                preferredBlockSize, 
                                                                                preferredSampleRate);
            mainUnit.put (i, unit);
        }
        
        return UnitType::applyMulAdd (mainUnit, mul, add);
    }
};


//------------------------------------------------------------------------------


template<class SampleType, Interp::TypeCode InterpTypeCode>
class CombDecayUnit
{
public:    
    typedef DelayFormCombDecay<SampleType,InterpTypeCode>       FormType;
    typedef DelayFormCombFB<SampleType,InterpTypeCode>          AltFormType;

    typedef Delay2ParamChannelInternal<FormType>                DelayInternal;
    typedef UnitBase<SampleType>                                UnitType;
    typedef InputDictionary                                     Inputs;
    
    typedef typename DelayInternal::Param1Type                  DurationType;
    typedef UnitBase<DurationType>                              DurationUnitType;
    
    typedef typename DelayInternal::Param2Type                  DecayType;
    typedef UnitBase<DecayType>                                 DecayUnitType;
    
    typedef CombDecayUnit<SampleType, Interp::Lagrange3>        HQ;
    typedef CombDecayUnit<SampleType, Interp::None>             N;
    
    static inline UnitInfos getInfo() throw()
    {
        const double blockSize = (double)BlockSize::getDefault().getValue();
        const double sampleRate = SampleRate::getDefault().getValue();
        
        return UnitInfo ("CombDecay", "A comb filter setting the decay as a time to decay by 60dB.",
                         
                         // output
                         ChannelCount::VariableChannelCount, 
                         IOKey::Generic,            Measure::None,      0.0,                IOLimit::None,                         
                         IOKey::End,
                         
                         // inputs
                         IOKey::Generic,            Measure::None,      IOInfo::NoDefault,  IOLimit::None,
                         IOKey::Duration,           Measure::Seconds,   0.5,                IOLimit::Minimum,   Measure::Seconds,   0.0,
                         IOKey::Decay,              Measure::Seconds,   1.0,                IOLimit::None,
                         IOKey::MaximumDuration,    Measure::Seconds,   1.0,                IOLimit::Minimum,   Measure::Samples,   1.0,
                         IOKey::Multiply,           Measure::Factor,    1.0,                IOLimit::None,
                         IOKey::Add,                Measure::None,      0.0,                IOLimit::None,
                         IOKey::BlockSize,          Measure::Samples,   blockSize,          IOLimit::Minimum,   Measure::Samples,   1.0,
                         IOKey::SampleRate,         Measure::Hertz,     sampleRate,         IOLimit::Minimum,   Measure::Hertz,     0.0,
                         IOKey::End);
    }
    
    static UnitType ar (UnitType const& input,
                        DurationUnitType const& duration = DurationType (0.5),
                        DecayUnitType const& decay = DecayType (1.0),
                        const DurationType maximumDuration = DurationType (1.0),
                        UnitType const& mul = SampleType (1),
                        UnitType const& add = SampleType (0),
                        BlockSize const& preferredBlockSize = BlockSize::getDefault(),
                        SampleRate const& preferredSampleRate = SampleRate::getDefault()) throw()
    {             
        if (duration.isEachChannelConstant() && decay.isEachChannelConstant())
            return AltFormType::ar (input, duration, duration.getValues().decayFeedback (decay.getValues()), maximumDuration,
                                    mul, add, preferredBlockSize, preferredSampleRate);
        else 
            return FormType::ar (input, duration, decay, maximumDuration, 
                                 mul, add, preferredBlockSize, preferredSampleRate);
    }
    
};

typedef CombDecayUnit<PLONK_TYPE_DEFAULT> CombDecay;


#endif // PLONK_DELAYFORMCOMBDECAY_H