Carla/source/modules/juce_audio_basics/mpe/juce_MPEValue.h

/*
  ==============================================================================

   This file is part of the JUCE library.
   Copyright (c) 2015 - ROLI Ltd.

   Permission is granted to use this software under the terms of either:
   a) the GPL v2 (or any later version)
   b) the Affero GPL v3

   Details of these licenses can be found at: www.gnu.org/licenses

   JUCE is distributed in the hope that it will be useful, but WITHOUT ANY
   WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
   A PARTICULAR PURPOSE.  See the GNU General Public License for more details.

   ------------------------------------------------------------------------------

   To release a closed-source product which uses JUCE, commercial licenses are
   available: visit www.juce.com for more information.

  ==============================================================================
*/

#ifndef JUCE_MPEVALUE_H_INCLUDED
#define JUCE_MPEVALUE_H_INCLUDED


//==============================================================================
/**
    This class represents a single value for any of the MPE
    dimensions of control. It supports values with 7-bit or 14-bit resolutions
    (corresponding to 1 or 2 MIDI bytes, respectively). It also offers helper
    functions to query the value in a variety of representations that can be
    useful in an audio or MIDI context.
*/
class JUCE_API  MPEValue
{
public:
    //==============================================================================
    /** Default constructor. Constructs an MPEValue corresponding
        to the centre value.
    */
    MPEValue() noexcept;

    /** Constructs an MPEValue from an integer between 0 and 127
        (using 7-bit precision).
    */
    static MPEValue from7BitInt (int value) noexcept;

    /** Constructs an MPEValue from an integer between 0 and 16383
        (using 14-bit precision).
    */
    static MPEValue from14BitInt (int value) noexcept;

    /** Constructs an MPEValue corresponding to the centre value. */
    static MPEValue centreValue() noexcept;

    /** Constructs an MPEValue corresponding to the minimum value. */
    static MPEValue minValue() noexcept;

    /** Constructs an MPEValue corresponding to the maximum value. */
    static MPEValue maxValue() noexcept;

    /** Retrieves the current value as an integer between 0 and 127.
        Information will be lost if the value was initialised with a precision
        higher than 7-bit.
    */
    int as7BitInt() const noexcept;

    /** Retrieves the current value as an integer between 0 and 16383.
        Resolution will be lost if the value was initialised with a precision
        higher than 14-bit.
    */
    int as14BitInt() const noexcept;

    /** Retrieves the current value mapped to a float between -1.0f and 1.0f. */
    float asSignedFloat() const noexcept;

    /** Retrieves the current value mapped to a float between 0.0f and 1.0f. */
    float asUnsignedFloat() const noexcept;

    /** Returns true if two values are equal. */
    bool operator== (const MPEValue& other) const noexcept;

    /** Returns true if two values are not equal. */
    bool operator!= (const MPEValue& other) const noexcept;

private:
    //==============================================================================
    MPEValue (int normalisedValue);
    int normalisedValue;
};


#endif // JUCE_MPEVALUE_H_INCLUDED