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138 lines
4.7 KiB
C++
138 lines
4.7 KiB
C++
/*
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==============================================================================
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This file is part of the JUCE framework.
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Copyright (c) Raw Material Software Limited
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JUCE is an open source framework subject to commercial or open source
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licensing.
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By downloading, installing, or using the JUCE framework, or combining the
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JUCE framework with any other source code, object code, content or any other
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copyrightable work, you agree to the terms of the JUCE End User Licence
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Agreement, and all incorporated terms including the JUCE Privacy Policy and
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the JUCE Website Terms of Service, as applicable, which will bind you. If you
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do not agree to the terms of these agreements, we will not license the JUCE
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framework to you, and you must discontinue the installation or download
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process and cease use of the JUCE framework.
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JUCE End User Licence Agreement: https://juce.com/legal/juce-8-licence/
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JUCE Privacy Policy: https://juce.com/juce-privacy-policy
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JUCE Website Terms of Service: https://juce.com/juce-website-terms-of-service/
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Or:
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You may also use this code under the terms of the AGPLv3:
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https://www.gnu.org/licenses/agpl-3.0.en.html
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THE JUCE FRAMEWORK IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL
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WARRANTIES, WHETHER EXPRESSED OR IMPLIED, INCLUDING WARRANTY OF
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MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, ARE DISCLAIMED.
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==============================================================================
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*/
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/** @cond */
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namespace juce::universal_midi_packets
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{
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/**
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Helpful types and functions for interacting with Universal MIDI Packets.
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@tags{Audio}
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*/
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struct Utils
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{
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/** Joins 4 bytes into a single 32-bit word. */
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static constexpr uint32_t bytesToWord (std::byte a, std::byte b, std::byte c, std::byte d)
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{
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return uint32_t (a) << 0x18
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| uint32_t (b) << 0x10
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| uint32_t (c) << 0x08
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| uint32_t (d) << 0x00;
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}
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/** Returns the expected number of 32-bit words in a Universal MIDI Packet, given
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the first word of the packet.
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The result will be between 1 and 4 inclusive.
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A result of 1 means that the word is itself a complete packet.
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*/
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static uint32_t getNumWordsForMessageType (uint32_t);
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/**
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Helper functions for setting/getting 4-bit ranges inside a 32-bit word.
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*/
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template <size_t Index>
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struct U4
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{
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static constexpr uint32_t shift = (uint32_t) 0x1c - Index * 4;
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static constexpr uint32_t set (uint32_t word, uint8_t value)
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{
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return (word & ~((uint32_t) 0xf << shift)) | (uint32_t) ((value & 0xf) << shift);
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}
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static constexpr uint8_t get (uint32_t word)
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{
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return (word >> shift) & 0xf;
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}
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};
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/**
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Helper functions for setting/getting 8-bit ranges inside a 32-bit word.
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*/
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template <size_t Index>
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struct U8
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{
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static constexpr uint32_t shift = (uint32_t) 0x18 - Index * 8;
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static constexpr uint32_t set (uint32_t word, uint8_t value)
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{
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return (word & ~((uint32_t) 0xff << shift)) | (uint32_t) (value << shift);
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}
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static constexpr uint8_t get (uint32_t word)
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{
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return (word >> shift) & 0xff;
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}
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};
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/**
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Helper functions for setting/getting 16-bit ranges inside a 32-bit word.
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*/
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template <size_t Index>
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struct U16
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{
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static constexpr uint32_t shift = (uint32_t) 0x10 - Index * 16;
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static constexpr uint32_t set (uint32_t word, uint16_t value)
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{
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return (word & ~((uint32_t) 0xffff << shift)) | (uint32_t) (value << shift);
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}
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static constexpr uint16_t get (uint32_t word)
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{
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return (uint16_t) ((word >> shift) & 0xffff);
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}
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};
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enum class MessageKind : uint8_t
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{
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utility = 0x0,
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commonRealtime = 0x1,
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channelVoice1 = 0x2,
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sysex7 = 0x3,
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channelVoice2 = 0x4,
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sysex8 = 0x5,
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stream = 0xf,
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};
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static constexpr MessageKind getMessageType (uint32_t w) noexcept { return MessageKind { U4<0>::get (w) }; }
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static constexpr uint8_t getGroup (uint32_t w) noexcept { return U4<1>::get (w); }
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static constexpr std::byte getStatus (uint32_t w) noexcept { return std::byte { U4<2>::get (w) }; }
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static constexpr uint8_t getChannel (uint32_t w) noexcept { return U4<3>::get (w); }
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};
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} // namespace juce::universal_midi_packets
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/** @endcond */
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