usb_midi.h

/* Teensyduino Core Library
 * http://www.pjrc.com/teensy/
 * Copyright (c) 2017 PJRC.COM, LLC.
 *
 * 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:
 *
 * 1. The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * 2. If the Software is incorporated into a build system that allows
 * selection among a list of target devices, then similar target
 * devices manufactured by PJRC.COM must be included in the list of
 * target devices and selectable in the same manner.
 *
 * 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 USBmidi_h_
#define USBmidi_h_

#include "usb_desc.h"

#if defined(MIDI_INTERFACE)

#include <inttypes.h>

// maximum sysex length we can receive
#if defined(__MKL26Z64__) || defined(__MK20DX128__)
#define USB_MIDI_SYSEX_MAX  60
#else
#define USB_MIDI_SYSEX_MAX 290
#endif

// C language implementation
#ifdef __cplusplus
extern "C" {
#endif
void usb_midi_write_packed(uint32_t n);
void usb_midi_send_sysex_buffer_has_term(const uint8_t *data, uint32_t length, uint8_t cable);
void usb_midi_send_sysex_add_term_bytes(const uint8_t *data, uint32_t length, uint8_t cable);
void usb_midi_flush_output(void);
int usb_midi_read(uint32_t channel);
uint32_t usb_midi_available(void);
uint32_t usb_midi_read_message(void);
extern uint8_t usb_midi_msg_cable;
extern uint8_t usb_midi_msg_channel;
extern uint8_t usb_midi_msg_type;
extern uint8_t usb_midi_msg_data1;
extern uint8_t usb_midi_msg_data2;
extern uint8_t usb_midi_msg_sysex[USB_MIDI_SYSEX_MAX];
extern uint16_t usb_midi_msg_sysex_len;
extern void (*usb_midi_handleNoteOff)(uint8_t ch, uint8_t note, uint8_t vel);
extern void (*usb_midi_handleNoteOn)(uint8_t ch, uint8_t note, uint8_t vel);
extern void (*usb_midi_handleVelocityChange)(uint8_t ch, uint8_t note, uint8_t vel);
extern void (*usb_midi_handleControlChange)(uint8_t ch, uint8_t control, uint8_t value);
extern void (*usb_midi_handleProgramChange)(uint8_t ch, uint8_t program);
extern void (*usb_midi_handleAfterTouch)(uint8_t ch, uint8_t pressure);
extern void (*usb_midi_handlePitchChange)(uint8_t ch, int pitch);
extern void (*usb_midi_handleSysExPartial)(const uint8_t *data, uint16_t length, uint8_t complete);
extern void (*usb_midi_handleSysExComplete)(uint8_t *data, unsigned int size);
extern void (*usb_midi_handleTimeCodeQuarterFrame)(uint8_t data);
extern void (*usb_midi_handleSongPosition)(uint16_t beats);
extern void (*usb_midi_handleSongSelect)(uint8_t songnumber);
extern void (*usb_midi_handleTuneRequest)(void);
extern void (*usb_midi_handleClock)(void);
extern void (*usb_midi_handleStart)(void);
extern void (*usb_midi_handleContinue)(void);
extern void (*usb_midi_handleStop)(void);
extern void (*usb_midi_handleActiveSensing)(void);
extern void (*usb_midi_handleSystemReset)(void);
extern void (*usb_midi_handleRealTimeSystem)(uint8_t rtb);

#ifdef __cplusplus
}
#endif

// To test receiving on Linux, run "aseqdump -l" to list sequencer devices.
//
//    Port    Client name                      Port name
//     0:0    System                           Timer
//     0:1    System                           Announce
//    14:0    Midi Through                     Midi Through Port-0
//    24:0    Teensy MIDI                      Teensy MIDI MIDI 1
//    28:0    AKM320                           AKM320 MIDI 1
//
// Then run "aseqdump -p 24:0" to view the MIDI messages.
//
//    Waiting for data. Press Ctrl+C to end.
//    Source  Event                  Ch  Data
//     24:0   Note on                 0, note 61, velocity 99
//     24:0   Note off                0, note 61, velocity 0
//     24:0   Note on                 0, note 62, velocity 99
//     24:0   Note off                0, note 62, velocity 0
//     24:0   Note on                 0, note 64, velocity 99
//     24:0   Note off                0, note 64, velocity 0
//
// Quick-dirty way to transmit MIDI sysex:
//     echo -n -e '\xF0abcd\xF7' > /dev/midi2

// C++ interface
#ifdef __cplusplus
class usb_midi_class
{
        public:
	// Message type names for compatibility with Arduino MIDI library 4.3.1
	enum MidiType {
		InvalidType           = 0x00, // For notifying errors
		NoteOff               = 0x80, // Note Off
		NoteOn                = 0x90, // Note On
		AfterTouchPoly        = 0xA0, // Polyphonic AfterTouch
		ControlChange         = 0xB0, // Control Change / Channel Mode
		ProgramChange         = 0xC0, // Program Change
		AfterTouchChannel     = 0xD0, // Channel (monophonic) AfterTouch
		PitchBend             = 0xE0, // Pitch Bend
		SystemExclusive       = 0xF0, // System Exclusive
		TimeCodeQuarterFrame  = 0xF1, // System Common - MIDI Time Code Quarter Frame
		SongPosition          = 0xF2, // System Common - Song Position Pointer
		SongSelect            = 0xF3, // System Common - Song Select
		TuneRequest           = 0xF6, // System Common - Tune Request
		Clock                 = 0xF8, // System Real Time - Timing Clock
		Start                 = 0xFA, // System Real Time - Start
		Continue              = 0xFB, // System Real Time - Continue
		Stop                  = 0xFC, // System Real Time - Stop
		ActiveSensing         = 0xFE, // System Real Time - Active Sensing
		SystemReset           = 0xFF, // System Real Time - System Reset
	};
        void begin(void) { }
        void end(void) { }
        void sendNoteOff(uint8_t note, uint8_t velocity, uint8_t channel, uint8_t cable=0) __attribute__((always_inline)) {
		send(0x80, note, velocity, channel, cable);
	}
        void sendNoteOn(uint8_t note, uint8_t velocity, uint8_t channel, uint8_t cable=0) __attribute__((always_inline)) {
		send(0x90, note, velocity, channel, cable);
	}
        void sendPolyPressure(uint8_t note, uint8_t pressure, uint8_t channel, uint8_t cable=0) __attribute__((always_inline)) {
		send(0xA0, note, pressure, channel, cable);
	}
	void sendAfterTouchPoly(uint8_t note, uint8_t pressure, uint8_t channel, uint8_t cable=0) __attribute__((always_inline)) {
		send(0xA0, note, pressure, channel, cable);
	}
        void sendControlChange(uint8_t control, uint8_t value, uint8_t channel, uint8_t cable=0) __attribute__((always_inline)) {
		send(0xB0, control, value, channel, cable);
	}
        void sendProgramChange(uint8_t program, uint8_t channel, uint8_t cable=0) __attribute__((always_inline)) {
		send(0xC0, program, 0, channel, cable);
	}
        void sendAfterTouch(uint8_t pressure, uint8_t channel, uint8_t cable=0) __attribute__((always_inline)) {
		send(0xD0, pressure, 0, channel, cable);
	}
        void sendPitchBend(int value, uint8_t channel, uint8_t cable=0) __attribute__((always_inline)) {
		if (value < -8192) {
			value = -8192;
		} else if (value > 8191) {
			value = 8191;
		}
		value += 8192;
		send(0xE0, value, value >> 7, channel, cable);
	}
        void sendSysEx(uint32_t length, const uint8_t *data, bool hasTerm=false, uint8_t cable=0) __attribute__((always_inline)) {
		if (cable >= MIDI_NUM_CABLES) return;
		if (hasTerm) {
			usb_midi_send_sysex_buffer_has_term(data, length, cable);
		} else {
			usb_midi_send_sysex_add_term_bytes(data, length, cable);
		}
	}
	void sendRealTime(uint8_t type, uint8_t cable=0) __attribute__((always_inline)) __attribute__((always_inline)) {
		switch (type) {
			case 0xF8: // Clock
			case 0xFA: // Start
			case 0xFB: // Continue
			case 0xFC: // Stop
			case 0xFE: // ActiveSensing
			case 0xFF: // SystemReset
				send(type, 0, 0, 0, cable);
				break;
			default: // Invalid Real Time marker
				break;
		}
	}
	void sendTimeCodeQuarterFrame(uint8_t type, uint8_t value, uint8_t cable=0) __attribute__((always_inline)) __attribute__((always_inline)) {
		send(0xF1, ((type & 0x07) << 4) | (value & 0x0F), 0, 0, cable);
	}
	void sendSongPosition(uint16_t beats, uint8_t cable=0) __attribute__((always_inline)) {
		send(0xF2, beats, beats >> 7, 0, cable);
	}
	void sendSongSelect(uint8_t song, uint8_t cable=0) __attribute__((always_inline)) {
		send(0xF3, song, 0, 0, cable);
	}
	void sendTuneRequest(uint8_t cable=0) __attribute__((always_inline)) {
		send(0xF6, 0, 0, 0, cable);
	}
	void beginRpn(uint16_t number, uint8_t channel, uint8_t cable=0) __attribute__((always_inline)) {
		sendControlChange(101, number >> 7, channel, cable);
		sendControlChange(100, number, channel, cable);
	}
	void sendRpnValue(uint16_t value, uint8_t channel, uint8_t cable=0) __attribute__((always_inline)) {
		sendControlChange(6, value >> 7, channel, cable);
		sendControlChange(38, value, channel, cable);
	}
	void sendRpnIncrement(uint8_t amount, uint8_t channel, uint8_t cable=0) __attribute__((always_inline)) {
		sendControlChange(96, amount, channel, cable);
	}
	void sendRpnDecrement(uint8_t amount, uint8_t channel, uint8_t cable=0) __attribute__((always_inline)) {
		sendControlChange(97, amount, channel, cable);
	}
	void endRpn(uint8_t channel, uint8_t cable=0) __attribute__((always_inline)) {
		sendControlChange(101, 0x7F, channel, cable);
		sendControlChange(100, 0x7F, channel, cable);
	}
	void beginNrpn(uint16_t number, uint8_t channel, uint8_t cable=0) __attribute__((always_inline)) {
		sendControlChange(99, number >> 7, channel, cable);
		sendControlChange(98, number, channel, cable);
	}
	void sendNrpnValue(uint16_t value, uint8_t channel, uint8_t cable=0) __attribute__((always_inline)) {
		sendControlChange(6, value >> 7, channel, cable);
		sendControlChange(38, value, channel, cable);
	}
	void sendNrpnIncrement(uint8_t amount, uint8_t channel, uint8_t cable=0) __attribute__((always_inline)) {
		sendControlChange(96, amount, channel, cable);
	}
	void sendNrpnDecrement(uint8_t amount, uint8_t channel, uint8_t cable=0) __attribute__((always_inline)) {
		sendControlChange(97, amount, channel, cable);
	}
	void endNrpn(uint8_t channel, uint8_t cable=0) __attribute__((always_inline)) {
		sendControlChange(99, 0x7F, channel, cable);
		sendControlChange(98, 0x7F, channel, cable);
	}
	void send(uint8_t type, uint8_t data1, uint8_t data2, uint8_t channel, uint8_t cable) __attribute__((always_inline)) {
		if (cable >= MIDI_NUM_CABLES) return;
		if (type < 0xF0) {
			if (type < 0x80) return;
			type &= 0xF0;
			usb_midi_write_packed((type << 8) | (type >> 4) | ((cable & 0x0F) << 4)
			  | (((channel - 1) & 0x0F) << 8) | ((data1 & 0x7F) << 16)
			  | ((data2 & 0x7F) << 24));
		} else if (type >= 0xF8 || type == 0xF6) {
			usb_midi_write_packed((type << 8) | 0x0F | ((cable & 0x0F) << 4));
		} else if (type == 0xF1 || type == 0xF3) {
			usb_midi_write_packed((type << 8) | 0x02 | ((cable & 0x0F) << 4)
			  | ((data1 & 0x7F) << 16));
		} else if (type == 0xF2) {
			usb_midi_write_packed((type << 8) | 0x03 | ((cable & 0x0F) << 4)
			  | ((data1 & 0x7F) << 16) | ((data2 & 0x7F) << 24));
		}
	}
        void send_now(void) __attribute__((always_inline)) {
		usb_midi_flush_output();
	}
        uint8_t analog2velocity(uint16_t val, uint8_t range);
        bool read(uint8_t channel=0) __attribute__((always_inline)) {
		return usb_midi_read(channel);
	}
        uint8_t getType(void) __attribute__((always_inline)) {
                return usb_midi_msg_type;
        }
        uint8_t getCable(void) __attribute__((always_inline)) {
                return usb_midi_msg_cable;
        }
        uint8_t getChannel(void) __attribute__((always_inline)) {
                return usb_midi_msg_channel;
        }
        uint8_t getData1(void) __attribute__((always_inline)) {
                return usb_midi_msg_data1;
        }
        uint8_t getData2(void) __attribute__((always_inline)) {
                return usb_midi_msg_data2;
        }
        uint8_t * getSysExArray(void) __attribute__((always_inline)) {
                return usb_midi_msg_sysex;
        }
	uint16_t getSysExArrayLength(void) __attribute__((always_inline)) {
                return usb_midi_msg_data2 << 8 | usb_midi_msg_data1;
        }
	
        void setHandleNoteOff(void (*fptr)(uint8_t channel, uint8_t note, uint8_t velocity)) {
		// type: 0x80  NoteOff
                usb_midi_handleNoteOff = fptr;
        }
        void setHandleNoteOn(void (*fptr)(uint8_t channel, uint8_t note, uint8_t velocity)) {
		// type: 0x90  NoteOn
                usb_midi_handleNoteOn = fptr;
        }
        void setHandleVelocityChange(void (*fptr)(uint8_t channel, uint8_t note, uint8_t velocity)) {
		// type: 0xA0  AfterTouchPoly
                usb_midi_handleVelocityChange = fptr;
        }
	void setHandleAfterTouchPoly(void (*fptr)(uint8_t channel, uint8_t note, uint8_t pressure)) {
		// type: 0xA0  AfterTouchPoly
                usb_midi_handleVelocityChange = fptr;
        }
        void setHandleControlChange(void (*fptr)(uint8_t channel, uint8_t control, uint8_t value)) {
		// type: 0xB0  ControlChange
                usb_midi_handleControlChange = fptr;
        }
        void setHandleProgramChange(void (*fptr)(uint8_t channel, uint8_t program)) {
		// type: 0xC0  ProgramChange
                usb_midi_handleProgramChange = fptr;
        }
        void setHandleAfterTouch(void (*fptr)(uint8_t channel, uint8_t pressure)) {
		// type: 0xD0  AfterTouchChannel
                usb_midi_handleAfterTouch = fptr;
        }
        void setHandleAfterTouchChannel(void (*fptr)(uint8_t channel, uint8_t pressure)) {
		// type: 0xD0  AfterTouchChannel
                usb_midi_handleAfterTouch = fptr;
        }
        void setHandlePitchChange(void (*fptr)(uint8_t channel, int pitch)) {
		// type: 0xE0  PitchBend
                usb_midi_handlePitchChange = fptr;
        }
        void setHandleSysEx(void (*fptr)(const uint8_t *data, uint16_t length, bool complete)) {
		// type: 0xF0  SystemExclusive - multiple calls for message bigger than buffer
                usb_midi_handleSysExPartial = (void (*)(const uint8_t *, uint16_t, uint8_t))fptr;
        }
        void setHandleSystemExclusive(void (*fptr)(const uint8_t *data, uint16_t length, bool complete)) {
		// type: 0xF0  SystemExclusive - multiple calls for message bigger than buffer
                usb_midi_handleSysExPartial = (void (*)(const uint8_t *, uint16_t, uint8_t))fptr;
        }
	void setHandleSystemExclusive(void (*fptr)(uint8_t *data, unsigned int size)) {
		// type: 0xF0  SystemExclusive - single call, message larger than buffer is truncated
		usb_midi_handleSysExComplete = fptr;
	}
        void setHandleTimeCodeQuarterFrame(void (*fptr)(uint8_t data)) {
		// type: 0xF1  TimeCodeQuarterFrame
                usb_midi_handleTimeCodeQuarterFrame = fptr;
        }
	void setHandleSongPosition(void (*fptr)(uint16_t beats)) {
		// type: 0xF2  SongPosition
		usb_midi_handleSongPosition = fptr;
	}
	void setHandleSongSelect(void (*fptr)(uint8_t songnumber)) {
		// type: 0xF3  SongSelect
		usb_midi_handleSongSelect = fptr;
	}
	void setHandleTuneRequest(void (*fptr)(void)) {
		// type: 0xF6  TuneRequest
		usb_midi_handleTuneRequest = fptr;
	}
	void setHandleClock(void (*fptr)(void)) {
		// type: 0xF8  Clock
		usb_midi_handleClock = fptr;
	}
	void setHandleStart(void (*fptr)(void)) {
		// type: 0xFA  Start
		usb_midi_handleStart = fptr;
	}
	void setHandleContinue(void (*fptr)(void)) {
		// type: 0xFB  Continue
		usb_midi_handleContinue = fptr;
	}
	void setHandleStop(void (*fptr)(void)) {
		// type: 0xFC  Stop
		usb_midi_handleStop = fptr;
	}
	void setHandleActiveSensing(void (*fptr)(void)) {
		// type: 0xFE  ActiveSensing
		usb_midi_handleActiveSensing = fptr;
	}
	void setHandleSystemReset(void (*fptr)(void)) {
		// type: 0xFF  SystemReset
		usb_midi_handleSystemReset = fptr;
	}
        void setHandleRealTimeSystem(void (*fptr)(uint8_t realtimebyte)) {
		// type: 0xF8-0xFF - if more specific handler not configured
                usb_midi_handleRealTimeSystem = fptr;
        };
};

extern usb_midi_class usbMIDI;


#endif // __cplusplus

#endif // MIDI_INTERFACE

#endif // USBmidi_h_