juce_Sampler.h

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 /*
  ==============================================================================
 
   This file is part of the JUCE library.
   Copyright (c) 2022 - Raw Material Software Limited
 
   JUCE is an open source library subject to commercial or open-source
   licensing.
 
   By using JUCE, you agree to the terms of both the JUCE 7 End-User License
   Agreement and JUCE Privacy Policy.
 
   End User License Agreement: www.juce.com/juce-7-licence
   Privacy Policy: www.juce.com/juce-privacy-policy
 
   Or: You may also use this code under the terms of the GPL v3 (see
   www.gnu.org/licenses).
 
   JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
   EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
   DISCLAIMED.
 
  ==============================================================================
*/
 
namespace juce
{
 
//==============================================================================
class JUCE_API  SamplerSound    : public SynthesiserSound
{
public:
    //==============================================================================
    SamplerSound (const String& name,
                  AudioFormatReader& source,
                  const BigInteger& midiNotes,
                  int midiNoteForNormalPitch,
                  double attackTimeSecs,
                  double releaseTimeSecs,
                  double maxSampleLengthSeconds);
 
    ~SamplerSound() override;
 
    //==============================================================================
    const String& getName() const noexcept                  { return name; }
 
    AudioBuffer<float>* getAudioData() const noexcept       { return data.get(); }
 
    //==============================================================================
    void setEnvelopeParameters (ADSR::Parameters parametersToUse)    { params = parametersToUse; }
 
    //==============================================================================
    bool appliesToNote (int midiNoteNumber) override;
    bool appliesToChannel (int midiChannel) override;
 
private:
    //==============================================================================
    friend class SamplerVoice;
 
    String name;
    std::unique_ptr<AudioBuffer<float>> data;
    double sourceSampleRate;
    BigInteger midiNotes;
    int length = 0, midiRootNote = 0;
 
    ADSR::Parameters params;
 
    JUCE_LEAK_DETECTOR (SamplerSound)
};
 
 
//==============================================================================
class JUCE_API  SamplerVoice    : public SynthesiserVoice
{
public:
    //==============================================================================
    SamplerVoice();
 
    ~SamplerVoice() override;
 
    //==============================================================================
    bool canPlaySound (SynthesiserSound*) override;
 
    void startNote (int midiNoteNumber, float velocity, SynthesiserSound*, int pitchWheel) override;
    void stopNote (float velocity, bool allowTailOff) override;
 
    void pitchWheelMoved (int newValue) override;
    void controllerMoved (int controllerNumber, int newValue) override;
 
    void renderNextBlock (AudioBuffer<float>&, int startSample, int numSamples) override;
    using SynthesiserVoice::renderNextBlock;
 
private:
    //==============================================================================
    double pitchRatio = 0;
    double sourceSamplePosition = 0;
    float lgain = 0, rgain = 0;
 
    ADSR adsr;
 
    JUCE_LEAK_DETECTOR (SamplerVoice)
};
 
} // namespace juce