juce_UMPUtils.h

Go to the documentation of this file.

 /*
  ==============================================================================
 
   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.
 
   The code included in this file is provided under the terms of the ISC license
   http://www.isc.org/downloads/software-support-policy/isc-license. Permission
   To use, copy, modify, and/or distribute this software for any purpose with or
   without fee is hereby granted provided that the above copyright notice and
   this permission notice appear in all copies.
 
   JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
   EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
   DISCLAIMED.
 
  ==============================================================================
*/
 
#ifndef DOXYGEN
 
namespace juce::universal_midi_packets
{
 
struct Utils
{
    static constexpr uint32_t bytesToWord (std::byte a, std::byte b, std::byte c, std::byte d)
    {
        return uint32_t (a) << 0x18
             | uint32_t (b) << 0x10
             | uint32_t (c) << 0x08
             | uint32_t (d) << 0x00;
    }
 
    static uint32_t getNumWordsForMessageType (uint32_t);
 
    template <size_t Index>
    struct U4
    {
        static constexpr uint32_t shift = (uint32_t) 0x1c - Index * 4;
 
        static constexpr uint32_t set (uint32_t word, uint8_t value)
        {
            return (word & ~((uint32_t) 0xf << shift)) | (uint32_t) ((value & 0xf) << shift);
        }
 
        static constexpr uint8_t get (uint32_t word)
        {
            return (uint8_t) ((word >> shift) & 0xf);
        }
    };
 
    template <size_t Index>
    struct U8
    {
        static constexpr uint32_t shift = (uint32_t) 0x18 - Index * 8;
 
        static constexpr uint32_t set (uint32_t word, uint8_t value)
        {
            return (word & ~((uint32_t) 0xff << shift)) | (uint32_t) (value << shift);
        }
 
        static constexpr uint8_t get (uint32_t word)
        {
            return (uint8_t) ((word >> shift) & 0xff);
        }
    };
 
    template <size_t Index>
    struct U16
    {
        static constexpr uint32_t shift = (uint32_t) 0x10 - Index * 16;
 
        static constexpr uint32_t set (uint32_t word, uint16_t value)
        {
            return (word & ~((uint32_t) 0xffff << shift)) | (uint32_t) (value << shift);
        }
 
        static constexpr uint16_t get (uint32_t word)
        {
            return (uint16_t) ((word >> shift) & 0xffff);
        }
    };
 
    static constexpr uint8_t getMessageType (uint32_t w) noexcept { return U4<0>::get (w); }
    static constexpr uint8_t getGroup       (uint32_t w) noexcept { return U4<1>::get (w); }
    static constexpr uint8_t getStatus      (uint32_t w) noexcept { return U4<2>::get (w); }
    static constexpr uint8_t getChannel     (uint32_t w) noexcept { return U4<3>::get (w); }
};
 
} // namespace juce::universal_midi_packets
 
#endif