USBMIDI - A library to send and receive MIDI messages over …

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A library to send and receive MIDI messages over USB using the default USB-MIDI drivers on Win/Mac

MIDIMessage.h@0:56b095524cf2, 2011-02-06 (annotated)

Committer:: simon
Date:: Sun Feb 06 17:26:29 2011 +0000
Revision:: 0:56b095524cf2
Child:: 1:ff74eabe02cd

Who changed what in which revision?

User	Revision	Line number	New contents of line
simon	0:56b095524cf2	1	/* MIDI Message Format
simon	0:56b095524cf2	2	*
simon	0:56b095524cf2	3	* [ msg(4) \| channel(4) ] [ 0 \| n(7) ] [ 0 \| m(7) ]
simon	0:56b095524cf2	4	*
simon	0:56b095524cf2	5	* MIDI Data Messages (Channel Specific)
simon	0:56b095524cf2	6	*
simon	0:56b095524cf2	7	* Message msg n m
simon	0:56b095524cf2	8	* ---------------------------------------------
simon	0:56b095524cf2	9	* Note Off 0x8 Key Velocity
simon	0:56b095524cf2	10	* Note On 0x9 Key Velocity
simon	0:56b095524cf2	11	* Polyphonic Aftertouch 0xA Key Pressure
simon	0:56b095524cf2	12	* Control Change 0xB Controller Value
simon	0:56b095524cf2	13	* Program Change 0xC Program -
simon	0:56b095524cf2	14	* Channel Aftertouch 0xD Pressure -
simon	0:56b095524cf2	15	* Pitch Wheel 0xE LSB MSB
simon	0:56b095524cf2	16	*/
simon	0:56b095524cf2	17
simon	0:56b095524cf2	18
simon	0:56b095524cf2	19	#ifndef MBED_MIDIMESSAGE_H
simon	0:56b095524cf2	20	#define MBED_MIDIMESSAGE_H
simon	0:56b095524cf2	21
simon	0:56b095524cf2	22	class MIDIMessage {
simon	0:56b095524cf2	23	public:
simon	0:56b095524cf2	24
simon	0:56b095524cf2	25	// create messages
simon	0:56b095524cf2	26
simon	0:56b095524cf2	27	static MIDIMessage NoteOff(int key, int velocity = 127, int channel = 0) {
simon	0:56b095524cf2	28	MIDIMessage msg;
simon	0:56b095524cf2	29	msg.data[0] = 0x80 \| (channel & 0x0F);
simon	0:56b095524cf2	30	msg.data[1] = key & 0x7F;
simon	0:56b095524cf2	31	msg.data[2] = velocity & 0x7F;
simon	0:56b095524cf2	32	return msg;
simon	0:56b095524cf2	33	}
simon	0:56b095524cf2	34
simon	0:56b095524cf2	35	static MIDIMessage NoteOn(int key, int velocity = 127, int channel = 0) {
simon	0:56b095524cf2	36	MIDIMessage msg;
simon	0:56b095524cf2	37	msg.data[0] = 0x90 \| (channel & 0x0F);
simon	0:56b095524cf2	38	msg.data[1] = key & 0x7F;
simon	0:56b095524cf2	39	msg.data[2] = velocity & 0x7F;
simon	0:56b095524cf2	40	return msg;
simon	0:56b095524cf2	41	}
simon	0:56b095524cf2	42
simon	0:56b095524cf2	43	static MIDIMessage PolyphonicAftertouch(int key, int pressure, int channel = 0) {
simon	0:56b095524cf2	44	MIDIMessage msg;
simon	0:56b095524cf2	45	msg.data[0] = 0xA0 \| (channel & 0x0F);
simon	0:56b095524cf2	46	msg.data[1] = key & 0x7F;
simon	0:56b095524cf2	47	msg.data[2] = pressure & 0x7F;
simon	0:56b095524cf2	48	return msg;
simon	0:56b095524cf2	49	}
simon	0:56b095524cf2	50
simon	0:56b095524cf2	51	static MIDIMessage ControlChange(int control, int value, int channel = 0) {
simon	0:56b095524cf2	52	MIDIMessage msg;
simon	0:56b095524cf2	53	msg.data[0] = 0xB0 \| (channel & 0x0F);
simon	0:56b095524cf2	54	msg.data[1] = control & 0x7F;
simon	0:56b095524cf2	55	msg.data[2] = value & 0x7F;
simon	0:56b095524cf2	56	return msg;
simon	0:56b095524cf2	57	}
simon	0:56b095524cf2	58
simon	0:56b095524cf2	59	static MIDIMessage ProgramChange(int program, int channel = 0) {
simon	0:56b095524cf2	60	MIDIMessage msg;
simon	0:56b095524cf2	61	msg.data[0] = 0xC0 \| (channel & 0x0F);
simon	0:56b095524cf2	62	msg.data[1] = program & 0x7F;
simon	0:56b095524cf2	63	msg.data[2] = 0x00;
simon	0:56b095524cf2	64	return msg;
simon	0:56b095524cf2	65	}
simon	0:56b095524cf2	66
simon	0:56b095524cf2	67	static MIDIMessage ChannelAftertouch(int pressure, int channel = 0) {
simon	0:56b095524cf2	68	MIDIMessage msg;
simon	0:56b095524cf2	69	msg.data[0] = 0xD0 \| (channel & 0x0F);
simon	0:56b095524cf2	70	msg.data[1] = pressure & 0x7F;
simon	0:56b095524cf2	71	msg.data[2] = 0x00;
simon	0:56b095524cf2	72	return msg;
simon	0:56b095524cf2	73	}
simon	0:56b095524cf2	74
simon	0:56b095524cf2	75	static MIDIMessage PitchWheel(int pitch = 0, int channel = 0) {
simon	0:56b095524cf2	76	MIDIMessage msg;
simon	0:56b095524cf2	77	int p = pitch + 8192; // 0 - 16383, 8192 is center
simon	0:56b095524cf2	78	msg.data[0] = 0xE0 \| (channel & 0x0F);
simon	0:56b095524cf2	79	msg.data[1] = p & 0x7F;
simon	0:56b095524cf2	80	msg.data[2] = (p >> 7) & 0x7F;
simon	0:56b095524cf2	81	return msg;
simon	0:56b095524cf2	82	}
simon	0:56b095524cf2	83
simon	0:56b095524cf2	84	static MIDIMessage AllNotesOff(int channel = 0) {
simon	0:56b095524cf2	85	return ControlChange(123, 0, channel);
simon	0:56b095524cf2	86	}
simon	0:56b095524cf2	87
simon	0:56b095524cf2	88	// decode messages
simon	0:56b095524cf2	89	enum MIDIMessageType {
simon	0:56b095524cf2	90	ErrorType,
simon	0:56b095524cf2	91	NoteOffType,
simon	0:56b095524cf2	92	NoteOnType,
simon	0:56b095524cf2	93	PolyphonicAftertouchType,
simon	0:56b095524cf2	94	ControlChangeType,
simon	0:56b095524cf2	95	ProgramChangeType,
simon	0:56b095524cf2	96	ChannelAftertouchType,
simon	0:56b095524cf2	97	PitchWheelType,
simon	0:56b095524cf2	98	AllNotesOffType
simon	0:56b095524cf2	99	};
simon	0:56b095524cf2	100
simon	0:56b095524cf2	101	MIDIMessageType type() {
simon	0:56b095524cf2	102	switch((data[0] >> 4) & 0xF) {
simon	0:56b095524cf2	103	case 0x8: return NoteOffType;
simon	0:56b095524cf2	104	case 0x9: return NoteOnType;
simon	0:56b095524cf2	105	case 0xA: return PolyphonicAftertouchType;
simon	0:56b095524cf2	106	case 0xB:
simon	0:56b095524cf2	107	if(controller() < 120) { // standard controllers
simon	0:56b095524cf2	108	return ControlChangeType;
simon	0:56b095524cf2	109	} else if(controller() == 123) {
simon	0:56b095524cf2	110	return AllNotesOffType;
simon	0:56b095524cf2	111	} else {
simon	0:56b095524cf2	112	return ErrorType; // unsupported atm
simon	0:56b095524cf2	113	}
simon	0:56b095524cf2	114	case 0xC: return ProgramChangeType;
simon	0:56b095524cf2	115	case 0xD: return ChannelAftertouchType;
simon	0:56b095524cf2	116	case 0xE: return PitchWheelType;
simon	0:56b095524cf2	117	default: return ErrorType;
simon	0:56b095524cf2	118	}
simon	0:56b095524cf2	119	}
simon	0:56b095524cf2	120
simon	0:56b095524cf2	121	int channel() {
simon	0:56b095524cf2	122	return (data[0] & 0x0F);
simon	0:56b095524cf2	123	}
simon	0:56b095524cf2	124
simon	0:56b095524cf2	125	int key() {
simon	0:56b095524cf2	126	return (data[1] & 0x7F);
simon	0:56b095524cf2	127	}
simon	0:56b095524cf2	128
simon	0:56b095524cf2	129	int velocity() {
simon	0:56b095524cf2	130	return (data[2] & 0x7F);
simon	0:56b095524cf2	131	}
simon	0:56b095524cf2	132
simon	0:56b095524cf2	133	int value() {
simon	0:56b095524cf2	134	return (data[2] & 0x7F);
simon	0:56b095524cf2	135	}
simon	0:56b095524cf2	136
simon	0:56b095524cf2	137	int pressure() {
simon	0:56b095524cf2	138	if(type() == PolyphonicAftertouchType) {
simon	0:56b095524cf2	139	return (data[2] & 0x7F);
simon	0:56b095524cf2	140	} else {
simon	0:56b095524cf2	141	return (data[1] & 0x7F);
simon	0:56b095524cf2	142	}
simon	0:56b095524cf2	143	}
simon	0:56b095524cf2	144
simon	0:56b095524cf2	145	int controller() {
simon	0:56b095524cf2	146	return (data[1] & 0x7F);
simon	0:56b095524cf2	147	}
simon	0:56b095524cf2	148
simon	0:56b095524cf2	149	int program() {
simon	0:56b095524cf2	150	return (data[1] & 0x7F);
simon	0:56b095524cf2	151	}
simon	0:56b095524cf2	152
simon	0:56b095524cf2	153	int pitch() {
simon	0:56b095524cf2	154	int p = ((data[2] & 0x7F) << 7) \| (data[1] & 0x7F);
simon	0:56b095524cf2	155	return p - 8192; // 0 - 16383, 8192 is center
simon	0:56b095524cf2	156	}
simon	0:56b095524cf2	157
simon	0:56b095524cf2	158	uint8_t data[3];
simon	0:56b095524cf2	159	};
simon	0:56b095524cf2	160
simon	0:56b095524cf2	161	#endif

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Type:	Library
Created:	23 Feb 2016
Imports:	7
Forks:	0
Commits:	5
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MIDIMessage.h@0:56b095524cf2, 2011-02-06 (annotated)

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