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- /* Copyright (c) 2010-2011 mbed.org, MIT License
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
- * and associated documentation files (the "Software"), to deal in the Software without
- * restriction, including without limitation the rights to use, copy, modify, merge, publish,
- * distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in all copies or
- * substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
- * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
- * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
- * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- */
-
- #ifndef MIDIMESSAGE_H
- #define MIDIMESSAGE_H
-
- #include "mbed.h"
-
- #define MAX_MIDI_MESSAGE_SIZE 256 // Max message size. SysEx can be up to 65536 but 256 should be fine for most usage
-
- // MIDI Message Format
- //
- // [ msg(4) | channel(4) ] [ 0 | n(7) ] [ 0 | m(7) ]
- //
- // MIDI Data Messages (Channel Specific)
- //
- // Message msg n m
- // ---------------------------------------------
- // Note Off 0x8 Key Velocity
- // Note On 0x9 Key Velocity
- // Polyphonic Aftertouch 0xA Key Pressure
- // Control Change 0xB Controller Value
- // Program Change 0xC Program -
- // Channel Aftertouch 0xD Pressure -
- // Pitch Wheel 0xE LSB MSB
-
- #define CABLE_NUM (0<<4)
-
- /** A MIDI message container */
- class MIDIMessage {
- public:
- MIDIMessage() : length(4) {}
-
- MIDIMessage(uint8_t *buf) : length(4) {
- for (int i = 0; i < 4; i++)
- data[i] = buf[i];
- }
-
- // New constructor, buf is a true MIDI message (not USBMidi message) and buf_len true message length.
- MIDIMessage(uint8_t *buf, int buf_len) {
- length=buf_len+1;
- // first byte keeped for retro-compatibility
- data[0]=0;
-
- for (int i = 0; i < buf_len; i++)
- data[i+1] = buf[i];
- }
-
- // create messages
-
- /** Create a NoteOff message
- * @param key Key ID
- * @param velocity Key velocity (0-127, default = 127)
- * @param channel Key channel (0-15, default 0)
- * @returns A MIDIMessage
- */
- static MIDIMessage NoteOff(int key, int velocity = 127, int channel = 0) {
- MIDIMessage msg;
- msg.data[0] = CABLE_NUM | 0x08;
- msg.data[1] = 0x80 | (channel & 0x0F);
- msg.data[2] = key & 0x7F;
- msg.data[3] = velocity & 0x7F;
- return msg;
- }
-
- /** Create a NoteOn message
- * @param key Key ID
- * @param velocity Key velocity (0-127, default = 127)
- * @param channel Key channel (0-15, default 0)
- * @returns A MIDIMessage
- */
- static MIDIMessage NoteOn(int key, int velocity = 127, int channel = 0) {
- MIDIMessage msg;
- msg.data[0] = CABLE_NUM | 0x09;
- msg.data[1] = 0x90 | (channel & 0x0F);
- msg.data[2] = key & 0x7F;
- msg.data[3] = velocity & 0x7F;
- return msg;
- }
-
- /** Create a PolyPhonic Aftertouch message
- * @param key Key ID
- * @param pressure Aftertouch pressure (0-127)
- * @param channel Key channel (0-15, default 0)
- * @returns A MIDIMessage
- */
- static MIDIMessage PolyphonicAftertouch(int key, int pressure, int channel = 0) {
- MIDIMessage msg;
- msg.data[0] = CABLE_NUM | 0x0A;
- msg.data[1] = 0xA0 | (channel & 0x0F);
- msg.data[2] = key & 0x7F;
- msg.data[3] = pressure & 0x7F;
- return msg;
- }
-
- /** Create a Control Change message
- * @param control Controller ID
- * @param value Controller value (0-127)
- * @param channel Controller channel (0-15, default 0)
- * @returns A MIDIMessage
- */
- static MIDIMessage ControlChange(int control, int value, int channel = 0) {
- MIDIMessage msg;
- msg.data[0] = CABLE_NUM | 0x0B;
- msg.data[1] = 0xB0 | (channel & 0x0F);
- msg.data[2] = control & 0x7F;
- msg.data[3] = value & 0x7F;
- return msg;
- }
-
- /** Create a Program Change message
- * @param program Program ID
- * @param channel Channel (0-15, default 0)
- * @returns A MIDIMessage
- */
- static MIDIMessage ProgramChange(int program, int channel = 0) {
- MIDIMessage msg;
- msg.data[0] = CABLE_NUM | 0x0C;
- msg.data[1] = 0xC0 | (channel & 0x0F);
- msg.data[2] = program & 0x7F;
- msg.data[3] = 0x00;
- return msg;
- }
-
- /** Create a Channel Aftertouch message
- * @param pressure Pressure
- * @param channel Key channel (0-15, default 0)
- * @returns A MIDIMessage
- */
- static MIDIMessage ChannelAftertouch(int pressure, int channel = 0) {
- MIDIMessage msg;
- msg.data[0] = CABLE_NUM | 0x0D;
- msg.data[1] = 0xD0 | (channel & 0x0F);
- msg.data[2] = pressure & 0x7F;
- msg.data[3] = 0x00;
- return msg;
- }
-
- /** Create a Pitch Wheel message
- * @param pitch Pitch (-8192 - 8191, default = 0)
- * @param channel Channel (0-15, default 0)
- * @returns A MIDIMessage
- */
- static MIDIMessage PitchWheel(int pitch = 0, int channel = 0) {
- MIDIMessage msg;
- int p = pitch + 8192; // 0 - 16383, 8192 is center
- msg.data[0] = CABLE_NUM | 0x0E;
- msg.data[1] = 0xE0 | (channel & 0x0F);
- msg.data[2] = p & 0x7F;
- msg.data[3] = (p >> 7) & 0x7F;
- return msg;
- }
-
- /** Create an All Notes Off message
- * @param channel Channel (0-15, default 0)
- * @returns A MIDIMessage
- */
- static MIDIMessage AllNotesOff(int channel = 0) {
- return ControlChange(123, 0, channel);
- }
-
- /** Create a SysEx message
- * @param data SysEx data (including 0xF0 .. 0xF7)
- * @param len SysEx data length
- * @returns A MIDIMessage
- */
- static MIDIMessage SysEx(uint8_t *data, int len) {
- MIDIMessage msg=MIDIMessage(data,len);
- return msg;
- }
-
- // decode messages
-
- /** MIDI Message Types */
- enum MIDIMessageType {
- ErrorType,
- NoteOffType,
- NoteOnType,
- PolyphonicAftertouchType,
- ControlChangeType,
- ProgramChangeType,
- ChannelAftertouchType,
- PitchWheelType,
- AllNotesOffType,
- SysExType
- };
-
- /** Read the message type
- * @returns MIDIMessageType
- */
- MIDIMessageType type() {
- switch((data[1] >> 4) & 0xF) {
- case 0x8: return NoteOffType;
- case 0x9: return NoteOnType;
- case 0xA: return PolyphonicAftertouchType;
- case 0xB:
- if(controller() < 120) { // standard controllers
- return ControlChangeType;
- } else if(controller() == 123) {
- return AllNotesOffType;
- } else {
- return ErrorType; // unsupported atm
- }
- case 0xC: return ProgramChangeType;
- case 0xD: return ChannelAftertouchType;
- case 0xE: return PitchWheelType;
- case 0xF: return SysExType;
- default: return ErrorType;
- }
- }
-
- /** Read the channel number */
- int channel() {
- return (data[1] & 0x0F);
- }
-
- /** Read the key ID */
- int key() {
- return (data[2] & 0x7F);
- }
-
- /** Read the velocity */
- int velocity() {
- return (data[3] & 0x7F);
- }
-
- /** Read the controller value */
- int value() {
- return (data[3] & 0x7F);
- }
-
- /** Read the aftertouch pressure */
- int pressure() {
- if(type() == PolyphonicAftertouchType) {
- return (data[3] & 0x7F);
- } else {
- return (data[2] & 0x7F);
- }
- }
-
- /** Read the controller number */
- int controller() {
- return (data[2] & 0x7F);
- }
-
- /** Read the program number */
- int program() {
- return (data[2] & 0x7F);
- }
-
- /** Read the pitch value */
- int pitch() {
- int p = ((data[3] & 0x7F) << 7) | (data[2] & 0x7F);
- return p - 8192; // 0 - 16383, 8192 is center
- }
-
- uint8_t data[MAX_MIDI_MESSAGE_SIZE+1];
- uint8_t length;
- };
-
- #endif
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