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juce_UMPacket.h
1/*
2 ==============================================================================
3
4 This file is part of the JUCE library.
5 Copyright (c) 2022 - Raw Material Software Limited
6
7 JUCE is an open source library subject to commercial or open-source
8 licensing.
9
10 The code included in this file is provided under the terms of the ISC license
11 http://www.isc.org/downloads/software-support-policy/isc-license. Permission
12 To use, copy, modify, and/or distribute this software for any purpose with or
13 without fee is hereby granted provided that the above copyright notice and
14 this permission notice appear in all copies.
15
16 JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
17 EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
18 DISCLAIMED.
19
20 ==============================================================================
21*/
22
23#ifndef DOXYGEN
24
25 namespace juce::universal_midi_packets
26{
27
33 template <size_t numWords>
34 class Packet
35{
36 public:
37 Packet() = default;
38
39 template <size_t w = numWords, std::enable_if_t<w == 1, int> = 0>
40 Packet (uint32_t a)
41 : contents { { a } }
42 {
43 jassert (Utils::getNumWordsForMessageType (a) == 1);
44 }
45
46 template <size_t w = numWords, std::enable_if_t<w == 2, int> = 0>
47 Packet (uint32_t a, uint32_t b)
48 : contents { { a, b } }
49 {
50 jassert (Utils::getNumWordsForMessageType (a) == 2);
51 }
52
53 template <size_t w = numWords, std::enable_if_t<w == 3, int> = 0>
54 Packet (uint32_t a, uint32_t b, uint32_t c)
55 : contents { { a, b, c } }
56 {
57 jassert (Utils::getNumWordsForMessageType (a) == 3);
58 }
59
60 template <size_t w = numWords, std::enable_if_t<w == 4, int> = 0>
61 Packet (uint32_t a, uint32_t b, uint32_t c, uint32_t d)
62 : contents { { a, b, c, d } }
63 {
64 jassert (Utils::getNumWordsForMessageType (a) == 4);
65 }
66
67 template <size_t w, std::enable_if_t<w == numWords, int> = 0>
68 explicit Packet (const std::array<uint32_t, w>& fullPacket)
69 : contents (fullPacket)
70 {
71 jassert (Utils::getNumWordsForMessageType (fullPacket.front()) == numWords);
72 }
73
74 Packet withMessageType (uint8_t type) const noexcept
75 {
76 return withU4<0> (type);
77 }
78
79 Packet withGroup (uint8_t group) const noexcept
80 {
81 return withU4<1> (group);
82 }
83
84 Packet withStatus (uint8_t status) const noexcept
85 {
86 return withU4<2> (status);
87 }
88
89 Packet withChannel (uint8_t channel) const noexcept
90 {
91 return withU4<3> (channel);
92 }
93
94 uint8_t getMessageType() const noexcept { return getU4<0>(); }
95
96 uint8_t getGroup() const noexcept { return getU4<1>(); }
97
98 uint8_t getStatus() const noexcept { return getU4<2>(); }
99
100 uint8_t getChannel() const noexcept { return getU4<3>(); }
101
102 template <size_t index>
103 Packet withU4 (uint8_t value) const noexcept
104 {
105 constexpr auto word = index / 8;
106 auto copy = *this;
107 std::get<word> (copy.contents) = Utils::U4<index % 8>::set (copy.template getU32<word>(), value);
108 return copy;
109 }
110
111 template <size_t index>
112 Packet withU8 (uint8_t value) const noexcept
113 {
114 constexpr auto word = index / 4;
115 auto copy = *this;
116 std::get<word> (copy.contents) = Utils::U8<index % 4>::set (copy.template getU32<word>(), value);
117 return copy;
118 }
119
120 template <size_t index>
121 Packet withU16 (uint16_t value) const noexcept
122 {
123 constexpr auto word = index / 2;
124 auto copy = *this;
125 std::get<word> (copy.contents) = Utils::U16<index % 2>::set (copy.template getU32<word>(), value);
126 return copy;
127 }
128
129 template <size_t index>
130 Packet withU32 (uint32_t value) const noexcept
131 {
132 auto copy = *this;
133 std::get<index> (copy.contents) = value;
134 return copy;
135 }
136
137 template <size_t index>
138 uint8_t getU4() const noexcept
139 {
140 return Utils::U4<index % 8>::get (this->template getU32<index / 8>());
141 }
142
143 template <size_t index>
144 uint8_t getU8() const noexcept
145 {
146 return Utils::U8<index % 4>::get (this->template getU32<index / 4>());
147 }
148
149 template <size_t index>
150 uint16_t getU16() const noexcept
151 {
152 return Utils::U16<index % 2>::get (this->template getU32<index / 2>());
153 }
154
155 template <size_t index>
156 uint32_t getU32() const noexcept
157 {
158 return std::get<index> (contents);
159 }
160
161 //==============================================================================
162 using Contents = std::array<uint32_t, numWords>;
163
164 using const_iterator = typename Contents::const_iterator;
165
166 const_iterator begin() const noexcept { return contents.begin(); }
167 const_iterator cbegin() const noexcept { return contents.begin(); }
168
169 const_iterator end() const noexcept { return contents.end(); }
170 const_iterator cend() const noexcept { return contents.end(); }
171
172 const uint32_t* data() const noexcept { return contents.data(); }
173
174 const uint32_t& front() const noexcept { return contents.front(); }
175 const uint32_t& back() const noexcept { return contents.back(); }
176
177 const uint32_t& operator[] (size_t index) const noexcept { return contents[index]; }
178
179 private:
180 Contents contents { {} };
181};
182
183 using PacketX1 = Packet<1>;
184 using PacketX2 = Packet<2>;
185 using PacketX3 = Packet<3>;
186 using PacketX4 = Packet<4>;
187
188} // namespace juce::universal_midi_packets
189
190#endif
juce::universal_midi_packets::Packet
Definition juce_UMPacket.h:35
juce::universal_midi_packets::Utils::U16
Definition juce_UMPUtils.h:95
juce::universal_midi_packets::Utils::U4
Definition juce_UMPUtils.h:57
juce::universal_midi_packets::Utils::U8
Definition juce_UMPUtils.h:76
juce::universal_midi_packets::Utils::getNumWordsForMessageType
static uint32_t getNumWordsForMessageType(uint32_t)
Definition juce_UMPUtils.cpp:26