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juce_RangedAudioParameter.h 2.4KB

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  1. /*
  2. ==============================================================================
  3. This file is part of the JUCE library.
  4. Copyright (c) 2020 - Raw Material Software Limited
  5. JUCE is an open source library subject to commercial or open-source
  6. licensing.
  7. By using JUCE, you agree to the terms of both the JUCE 6 End-User License
  8. Agreement and JUCE Privacy Policy (both effective as of the 16th June 2020).
  9. End User License Agreement: www.juce.com/juce-6-licence
  10. Privacy Policy: www.juce.com/juce-privacy-policy
  11. Or: You may also use this code under the terms of the GPL v3 (see
  12. www.gnu.org/licenses).
  13. JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
  14. EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
  15. DISCLAIMED.
  16. ==============================================================================
  17. */
  18. namespace juce
  19. {
  20. /**
  21. This abstract base class is used by some AudioProcessorParameter helper classes.
  22. @see AudioParameterFloat, AudioParameterInt, AudioParameterBool, AudioParameterChoice
  23. @tags{Audio}
  24. */
  25. class JUCE_API RangedAudioParameter : public AudioProcessorParameterWithID
  26. {
  27. public:
  28. /** The creation of this object requires providing a name and ID which will be
  29. constant for its lifetime.
  30. */
  31. RangedAudioParameter (const String& parameterID,
  32. const String& parameterName,
  33. const String& parameterLabel = {},
  34. Category parameterCategory = AudioProcessorParameter::genericParameter);
  35. /** Returns the range of values that the parameter can take. */
  36. virtual const NormalisableRange<float>& getNormalisableRange() const = 0;
  37. /** Returns the number of steps for this parameter based on the normalisable range's interval.
  38. If you are using lambda functions to define the normalisable range's snapping behaviour
  39. then you should override this function so that it returns the number of snapping points.
  40. */
  41. int getNumSteps() const override;
  42. /** Normalises and snaps a value based on the normalisable range. */
  43. float convertTo0to1 (float v) const noexcept;
  44. /** Denormalises and snaps a value based on the normalisable range. */
  45. float convertFrom0to1 (float v) const noexcept;
  46. };
  47. } // namespace juce