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#pragma once
#include <QList>
#include <QObject>
#include <QSet>
#include <QString>
#include "effects/defs.h"
class EffectProcessor;
/// EffectsBackend is an abstract base class that enumerates available effects
/// which are identified by EffectManifests. EffectsBackends create an
/// EffectProcessor when provided with an EffectManifest indicating which
/// specific EffectProcessor type to create. EffectProcessors implement the DSP
/// logic specific to each effect.
///
/// Currently the implemented EffectsBackend subclasses are for the effects
/// built into Mixxx and LV2 plugins. Other plugin types such as VSTs could be
/// added in the future by creating new subclasses of EffectsBackend,
/// EffectManifest, EffectState, and EffectProcessorImpl.
class EffectsBackend {
public:
virtual ~EffectsBackend(){};
virtual EffectBackendType getType() const = 0;
/// returns a list sorted like it should be displayed in the GUI
virtual const QList<QString> getEffectIds() const = 0;
/// returns a pointer to the manifest or a null pointer in case a
/// previously stored effect is no longer available
virtual EffectManifestPointer getManifest(const QString& effectId) const = 0;
virtual const QList<EffectManifestPointer> getManifests() const = 0;
virtual bool canInstantiateEffect(const QString& effectId) const = 0;
virtual std::unique_ptr<EffectProcessor> createProcessor(
const EffectManifestPointer pManifest) const = 0;
static EffectBackendType backendTypeFromString(const QString& typeName);
static QString backendTypeToString(EffectBackendType backendType);
/// Use this when showing the string in the GUI
static QString translatedBackendName(EffectBackendType backendType);
};
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