Aaron Silva / USBDevice

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USBMIDI/MIDIMessage.h@67:8e871bbb2647, 2017-03-09 (annotated)

Committer:
asilva14
Date:
Thu Mar 09 23:53:57 2017 +0000
Revision:
67:8e871bbb2647
Parent:
50:a3c50882f2c5 
commit;

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samux 1:80ab0d068708 1 /* Copyright (c) 2010-2011 mbed.org, MIT License
samux 1:80ab0d068708 2 *
samux 1:80ab0d068708 3 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
samux 1:80ab0d068708 4 * and associated documentation files (the "Software"), to deal in the Software without
samux 1:80ab0d068708 5 * restriction, including without limitation the rights to use, copy, modify, merge, publish,
samux 1:80ab0d068708 6 * distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the
samux 1:80ab0d068708 7 * Software is furnished to do so, subject to the following conditions:
samux 1:80ab0d068708 8 *
samux 1:80ab0d068708 9 * The above copyright notice and this permission notice shall be included in all copies or
samux 1:80ab0d068708 10 * substantial portions of the Software.
samux 1:80ab0d068708 11 *
samux 1:80ab0d068708 12 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
samux 1:80ab0d068708 13 * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
samux 1:80ab0d068708 14 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
samux 1:80ab0d068708 15 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
samux 1:80ab0d068708 16 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
samux 1:80ab0d068708 17 */
samux 1:80ab0d068708 18
samux 1:80ab0d068708 19 #ifndef MIDIMESSAGE_H
samux 1:80ab0d068708 20 #define MIDIMESSAGE_H
samux 1:80ab0d068708 21
samux 1:80ab0d068708 22 #include "mbed.h"
samux 1:80ab0d068708 23
mbed_official 48:03f8e580579a 24 #define MAX_MIDI_MESSAGE_SIZE 256 // Max message size. SysEx can be up to 65536 but 256 should be fine for most usage
mbed_official 48:03f8e580579a 25
samux 1:80ab0d068708 26 // MIDI Message Format
mbed_official 25:7c72828865f3 27 //
samux 1:80ab0d068708 28 // [ msg(4) | channel(4) ] [ 0 | n(7) ] [ 0 | m(7) ]
samux 1:80ab0d068708 29 //
samux 1:80ab0d068708 30 // MIDI Data Messages (Channel Specific)
samux 1:80ab0d068708 31 //
samux 1:80ab0d068708 32 // Message msg n m
samux 1:80ab0d068708 33 // ---------------------------------------------
samux 1:80ab0d068708 34 // Note Off 0x8 Key Velocity
samux 1:80ab0d068708 35 // Note On 0x9 Key Velocity
samux 1:80ab0d068708 36 // Polyphonic Aftertouch 0xA Key Pressure
samux 1:80ab0d068708 37 // Control Change 0xB Controller Value
samux 1:80ab0d068708 38 // Program Change 0xC Program -
samux 1:80ab0d068708 39 // Channel Aftertouch 0xD Pressure -
samux 1:80ab0d068708 40 // Pitch Wheel 0xE LSB MSB
samux 1:80ab0d068708 41
samux 1:80ab0d068708 42 #define CABLE_NUM (0<<4)
samux 1:80ab0d068708 43
samux 1:80ab0d068708 44 /** A MIDI message container */
samux 1:80ab0d068708 45 class MIDIMessage {
samux 1:80ab0d068708 46 public:
mbed_official 50:a3c50882f2c5 47 MIDIMessage() : length(4) {}
mbed_official 25:7c72828865f3 48
mbed_official 50:a3c50882f2c5 49 MIDIMessage(uint8_t *buf) : length(4) {
bogdanm 11:eeb3cbbaa996 50 for (int i = 0; i < 4; i++)
bogdanm 11:eeb3cbbaa996 51 data[i] = buf[i];
samux 1:80ab0d068708 52 }
mbed_official 25:7c72828865f3 53
mbed_official 48:03f8e580579a 54 // New constructor, buf is a true MIDI message (not USBMidi message) and buf_len true message length.
mbed_official 48:03f8e580579a 55 MIDIMessage(uint8_t *buf, int buf_len) {
mbed_official 48:03f8e580579a 56 length=buf_len+1;
mbed_official 48:03f8e580579a 57 // first byte keeped for retro-compatibility
mbed_official 48:03f8e580579a 58 data[0]=0;
mbed_official 48:03f8e580579a 59
mbed_official 48:03f8e580579a 60 for (int i = 0; i < buf_len; i++)
mbed_official 48:03f8e580579a 61 data[i+1] = buf[i];
mbed_official 48:03f8e580579a 62 }
mbed_official 48:03f8e580579a 63
samux 1:80ab0d068708 64 // create messages
mbed_official 25:7c72828865f3 65
mbed_official 25:7c72828865f3 66 /** Create a NoteOff message
samux 1:80ab0d068708 67 * @param key Key ID
samux 1:80ab0d068708 68 * @param velocity Key velocity (0-127, default = 127)
samux 1:80ab0d068708 69 * @param channel Key channel (0-15, default 0)
samux 1:80ab0d068708 70 * @returns A MIDIMessage
samux 1:80ab0d068708 71 */
samux 1:80ab0d068708 72 static MIDIMessage NoteOff(int key, int velocity = 127, int channel = 0) {
samux 1:80ab0d068708 73 MIDIMessage msg;
samux 1:80ab0d068708 74 msg.data[0] = CABLE_NUM | 0x08;
samux 1:80ab0d068708 75 msg.data[1] = 0x80 | (channel & 0x0F);
samux 1:80ab0d068708 76 msg.data[2] = key & 0x7F;
mbed_official 25:7c72828865f3 77 msg.data[3] = velocity & 0x7F;
samux 1:80ab0d068708 78 return msg;
samux 1:80ab0d068708 79 }
mbed_official 25:7c72828865f3 80
mbed_official 25:7c72828865f3 81 /** Create a NoteOn message
samux 1:80ab0d068708 82 * @param key Key ID
samux 1:80ab0d068708 83 * @param velocity Key velocity (0-127, default = 127)
samux 1:80ab0d068708 84 * @param channel Key channel (0-15, default 0)
samux 1:80ab0d068708 85 * @returns A MIDIMessage
samux 1:80ab0d068708 86 */
samux 1:80ab0d068708 87 static MIDIMessage NoteOn(int key, int velocity = 127, int channel = 0) {
samux 1:80ab0d068708 88 MIDIMessage msg;
samux 1:80ab0d068708 89 msg.data[0] = CABLE_NUM | 0x09;
samux 1:80ab0d068708 90 msg.data[1] = 0x90 | (channel & 0x0F);
samux 1:80ab0d068708 91 msg.data[2] = key & 0x7F;
mbed_official 25:7c72828865f3 92 msg.data[3] = velocity & 0x7F;
samux 1:80ab0d068708 93 return msg;
samux 1:80ab0d068708 94 }
mbed_official 25:7c72828865f3 95
mbed_official 25:7c72828865f3 96 /** Create a PolyPhonic Aftertouch message
samux 1:80ab0d068708 97 * @param key Key ID
samux 1:80ab0d068708 98 * @param pressure Aftertouch pressure (0-127)
samux 1:80ab0d068708 99 * @param channel Key channel (0-15, default 0)
samux 1:80ab0d068708 100 * @returns A MIDIMessage
mbed_official 25:7c72828865f3 101 */
samux 1:80ab0d068708 102 static MIDIMessage PolyphonicAftertouch(int key, int pressure, int channel = 0) {
samux 1:80ab0d068708 103 MIDIMessage msg;
samux 1:80ab0d068708 104 msg.data[0] = CABLE_NUM | 0x0A;
samux 1:80ab0d068708 105 msg.data[1] = 0xA0 | (channel & 0x0F);
samux 1:80ab0d068708 106 msg.data[2] = key & 0x7F;
mbed_official 25:7c72828865f3 107 msg.data[3] = pressure & 0x7F;
samux 1:80ab0d068708 108 return msg;
samux 1:80ab0d068708 109 }
mbed_official 25:7c72828865f3 110
mbed_official 25:7c72828865f3 111 /** Create a Control Change message
samux 1:80ab0d068708 112 * @param control Controller ID
samux 1:80ab0d068708 113 * @param value Controller value (0-127)
samux 1:80ab0d068708 114 * @param channel Controller channel (0-15, default 0)
samux 1:80ab0d068708 115 * @returns A MIDIMessage
samux 1:80ab0d068708 116 */
samux 1:80ab0d068708 117 static MIDIMessage ControlChange(int control, int value, int channel = 0) {
samux 1:80ab0d068708 118 MIDIMessage msg;
samux 1:80ab0d068708 119 msg.data[0] = CABLE_NUM | 0x0B;
samux 1:80ab0d068708 120 msg.data[1] = 0xB0 | (channel & 0x0F);
samux 1:80ab0d068708 121 msg.data[2] = control & 0x7F;
mbed_official 25:7c72828865f3 122 msg.data[3] = value & 0x7F;
samux 1:80ab0d068708 123 return msg;
samux 1:80ab0d068708 124 }
mbed_official 25:7c72828865f3 125
mbed_official 25:7c72828865f3 126 /** Create a Program Change message
samux 1:80ab0d068708 127 * @param program Program ID
samux 1:80ab0d068708 128 * @param channel Channel (0-15, default 0)
samux 1:80ab0d068708 129 * @returns A MIDIMessage
mbed_official 25:7c72828865f3 130 */
samux 1:80ab0d068708 131 static MIDIMessage ProgramChange(int program, int channel = 0) {
samux 1:80ab0d068708 132 MIDIMessage msg;
samux 1:80ab0d068708 133 msg.data[0] = CABLE_NUM | 0x0C;
samux 1:80ab0d068708 134 msg.data[1] = 0xC0 | (channel & 0x0F);
samux 1:80ab0d068708 135 msg.data[2] = program & 0x7F;
mbed_official 25:7c72828865f3 136 msg.data[3] = 0x00;
samux 1:80ab0d068708 137 return msg;
samux 1:80ab0d068708 138 }
mbed_official 25:7c72828865f3 139
mbed_official 25:7c72828865f3 140 /** Create a Channel Aftertouch message
mbed_official 25:7c72828865f3 141 * @param pressure Pressure
samux 1:80ab0d068708 142 * @param channel Key channel (0-15, default 0)
samux 1:80ab0d068708 143 * @returns A MIDIMessage
mbed_official 25:7c72828865f3 144 */
samux 1:80ab0d068708 145 static MIDIMessage ChannelAftertouch(int pressure, int channel = 0) {
samux 1:80ab0d068708 146 MIDIMessage msg;
samux 1:80ab0d068708 147 msg.data[0] = CABLE_NUM | 0x0D;
samux 1:80ab0d068708 148 msg.data[1] = 0xD0 | (channel & 0x0F);
samux 1:80ab0d068708 149 msg.data[2] = pressure & 0x7F;
mbed_official 25:7c72828865f3 150 msg.data[3] = 0x00;
samux 1:80ab0d068708 151 return msg;
samux 1:80ab0d068708 152 }
mbed_official 25:7c72828865f3 153
mbed_official 25:7c72828865f3 154 /** Create a Pitch Wheel message
samux 1:80ab0d068708 155 * @param pitch Pitch (-8192 - 8191, default = 0)
samux 1:80ab0d068708 156 * @param channel Channel (0-15, default 0)
samux 1:80ab0d068708 157 * @returns A MIDIMessage
mbed_official 25:7c72828865f3 158 */
samux 1:80ab0d068708 159 static MIDIMessage PitchWheel(int pitch = 0, int channel = 0) {
samux 1:80ab0d068708 160 MIDIMessage msg;
samux 1:80ab0d068708 161 int p = pitch + 8192; // 0 - 16383, 8192 is center
samux 1:80ab0d068708 162 msg.data[0] = CABLE_NUM | 0x0E;
samux 1:80ab0d068708 163 msg.data[1] = 0xE0 | (channel & 0x0F);
samux 1:80ab0d068708 164 msg.data[2] = p & 0x7F;
mbed_official 25:7c72828865f3 165 msg.data[3] = (p >> 7) & 0x7F;
samux 1:80ab0d068708 166 return msg;
samux 1:80ab0d068708 167 }
mbed_official 25:7c72828865f3 168
mbed_official 25:7c72828865f3 169 /** Create an All Notes Off message
samux 1:80ab0d068708 170 * @param channel Channel (0-15, default 0)
samux 1:80ab0d068708 171 * @returns A MIDIMessage
mbed_official 25:7c72828865f3 172 */
samux 1:80ab0d068708 173 static MIDIMessage AllNotesOff(int channel = 0) {
samux 1:80ab0d068708 174 return ControlChange(123, 0, channel);
samux 1:80ab0d068708 175 }
mbed_official 25:7c72828865f3 176
mbed_official 48:03f8e580579a 177 /** Create a SysEx message
mbed_official 48:03f8e580579a 178 * @param data SysEx data (including 0xF0 .. 0xF7)
mbed_official 48:03f8e580579a 179 * @param len SysEx data length
mbed_official 48:03f8e580579a 180 * @returns A MIDIMessage
mbed_official 48:03f8e580579a 181 */
mbed_official 48:03f8e580579a 182 static MIDIMessage SysEx(uint8_t *data, int len) {
mbed_official 48:03f8e580579a 183 MIDIMessage msg=MIDIMessage(data,len);
mbed_official 48:03f8e580579a 184 return msg;
mbed_official 48:03f8e580579a 185 }
mbed_official 48:03f8e580579a 186
samux 1:80ab0d068708 187 // decode messages
mbed_official 25:7c72828865f3 188
samux 1:80ab0d068708 189 /** MIDI Message Types */
samux 1:80ab0d068708 190 enum MIDIMessageType {
samux 1:80ab0d068708 191 ErrorType,
samux 1:80ab0d068708 192 NoteOffType,
samux 1:80ab0d068708 193 NoteOnType,
samux 1:80ab0d068708 194 PolyphonicAftertouchType,
samux 1:80ab0d068708 195 ControlChangeType,
samux 1:80ab0d068708 196 ProgramChangeType,
samux 1:80ab0d068708 197 ChannelAftertouchType,
samux 1:80ab0d068708 198 PitchWheelType,
mbed_official 48:03f8e580579a 199 AllNotesOffType,
mbed_official 48:03f8e580579a 200 SysExType
samux 1:80ab0d068708 201 };
mbed_official 25:7c72828865f3 202
samux 1:80ab0d068708 203 /** Read the message type
samux 1:80ab0d068708 204 * @returns MIDIMessageType
mbed_official 25:7c72828865f3 205 */
samux 1:80ab0d068708 206 MIDIMessageType type() {
samux 1:80ab0d068708 207 switch((data[1] >> 4) & 0xF) {
samux 1:80ab0d068708 208 case 0x8: return NoteOffType;
samux 1:80ab0d068708 209 case 0x9: return NoteOnType;
samux 1:80ab0d068708 210 case 0xA: return PolyphonicAftertouchType;
mbed_official 25:7c72828865f3 211 case 0xB:
samux 1:80ab0d068708 212 if(controller() < 120) { // standard controllers
samux 1:80ab0d068708 213 return ControlChangeType;
samux 1:80ab0d068708 214 } else if(controller() == 123) {
samux 1:80ab0d068708 215 return AllNotesOffType;
samux 1:80ab0d068708 216 } else {
samux 1:80ab0d068708 217 return ErrorType; // unsupported atm
samux 1:80ab0d068708 218 }
samux 1:80ab0d068708 219 case 0xC: return ProgramChangeType;
samux 1:80ab0d068708 220 case 0xD: return ChannelAftertouchType;
samux 1:80ab0d068708 221 case 0xE: return PitchWheelType;
mbed_official 48:03f8e580579a 222 case 0xF: return SysExType;
samux 1:80ab0d068708 223 default: return ErrorType;
samux 1:80ab0d068708 224 }
samux 1:80ab0d068708 225 }
samux 1:80ab0d068708 226
mbed_official 25:7c72828865f3 227 /** Read the channel number */
samux 1:80ab0d068708 228 int channel() {
samux 1:80ab0d068708 229 return (data[1] & 0x0F);
samux 1:80ab0d068708 230 }
mbed_official 25:7c72828865f3 231
mbed_official 25:7c72828865f3 232 /** Read the key ID */
samux 1:80ab0d068708 233 int key() {
mbed_official 25:7c72828865f3 234 return (data[2] & 0x7F);
samux 1:80ab0d068708 235 }
mbed_official 25:7c72828865f3 236
mbed_official 25:7c72828865f3 237 /** Read the velocity */
samux 1:80ab0d068708 238 int velocity() {
mbed_official 25:7c72828865f3 239 return (data[3] & 0x7F);
samux 1:80ab0d068708 240 }
samux 1:80ab0d068708 241
mbed_official 25:7c72828865f3 242 /** Read the controller value */
samux 1:80ab0d068708 243 int value() {
mbed_official 25:7c72828865f3 244 return (data[3] & 0x7F);
samux 1:80ab0d068708 245 }
mbed_official 25:7c72828865f3 246
mbed_official 25:7c72828865f3 247 /** Read the aftertouch pressure */
samux 1:80ab0d068708 248 int pressure() {
samux 1:80ab0d068708 249 if(type() == PolyphonicAftertouchType) {
mbed_official 25:7c72828865f3 250 return (data[3] & 0x7F);
samux 1:80ab0d068708 251 } else {
mbed_official 25:7c72828865f3 252 return (data[2] & 0x7F);
samux 1:80ab0d068708 253 }
samux 1:80ab0d068708 254 }
samux 1:80ab0d068708 255
mbed_official 25:7c72828865f3 256 /** Read the controller number */
samux 1:80ab0d068708 257 int controller() {
mbed_official 25:7c72828865f3 258 return (data[2] & 0x7F);
samux 1:80ab0d068708 259 }
samux 1:80ab0d068708 260
mbed_official 25:7c72828865f3 261 /** Read the program number */
samux 1:80ab0d068708 262 int program() {
mbed_official 25:7c72828865f3 263 return (data[2] & 0x7F);
samux 1:80ab0d068708 264 }
mbed_official 25:7c72828865f3 265
mbed_official 25:7c72828865f3 266 /** Read the pitch value */
samux 1:80ab0d068708 267 int pitch() {
samux 1:80ab0d068708 268 int p = ((data[3] & 0x7F) << 7) | (data[2] & 0x7F);
samux 1:80ab0d068708 269 return p - 8192; // 0 - 16383, 8192 is center
samux 1:80ab0d068708 270 }
mbed_official 25:7c72828865f3 271
mbed_official 48:03f8e580579a 272 uint8_t data[MAX_MIDI_MESSAGE_SIZE+1];
mbed_official 50:a3c50882f2c5 273 uint8_t length;
bogdanm 11:eeb3cbbaa996 274 };
samux 1:80ab0d068708 275
samux 1:80ab0d068708 276 #endif