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/**********************************************************************
Audacity: A Digital Audio Editor
StatefulPerTrackEffect.h
Dominic Mazzoni
Vaughan Johnson
Paul Licameli split from PerTrackEffect.h
**********************************************************************/
#ifndef __AUDACITY_STATEFUL_PER_TRACK_EFFECT__
#define __AUDACITY_STATEFUL_PER_TRACK_EFFECT__
#include "PerTrackEffect.h" // to inherit
#include "StatefulEffectBase.h" // to inherit
//! Subclass of PerTrackEffect, to be eliminated after all of its subclasses
//! are rewritten to be stateless
class EFFECTS_API StatefulPerTrackEffect :
public StatefulEffectBase,
public PerTrackEffect
{
public:
//! Implemented with call-throughs to the
//! StatefulPerTrackEffect virtual functions
class EFFECTS_API Instance :
public StatefulEffectBase::Instance,
public PerTrackEffect::Instance
{
public:
explicit Instance(StatefulPerTrackEffect &effect)
: StatefulEffectBase::Instance{ effect }
, PerTrackEffect::Instance{ effect }
{}
~Instance() override;
bool ProcessInitialize(EffectSettings &settings, double sampleRate,
ChannelNames chanMap) override;
bool ProcessFinalize() noexcept override;
size_t ProcessBlock(EffectSettings &settings,
const float *const *inBlock, float *const *outBlock, size_t blockLen)
override;
protected:
StatefulPerTrackEffect &GetEffect() const
{
// Tolerate const_cast in this class while it sun-sets
return static_cast<StatefulPerTrackEffect &>(
const_cast<PerTrackEffect &>(mProcessor));
}
};
~StatefulPerTrackEffect() override;
std::shared_ptr<EffectInstance> MakeInstance() const override;
size_t SetBlockSize(size_t maxBlockSize) override;
size_t GetBlockSize() const override;
/*!
@copydoc PerTrackEffect::Instance::ProcessInitialize()
*/
bool ProcessInitialize(EffectSettings &settings, double sampleRate,
ChannelNames chanMap = nullptr) override;
/*!
@copydoc PerTrackEffect::Instance::ProcessFinalize()
*/
bool ProcessFinalize() noexcept override;
/*!
@copydoc PerTrackEffect::Instance::ProcessBlock()
*/
virtual size_t ProcessBlock(EffectSettings &settings,
const float *const *inBlock, float *const *outBlock, size_t blockLen) = 0;
private:
bool Process(EffectInstance &instance, EffectSettings &settings) final;
size_t mBlockSize{};
};
#endif
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