view include/Midi.h @ 181:391ad036557d

Basic Midi input implementation

/*
 * Midi.h
 *
 *  Created on: 15 Jan 2016
 *      Author: giulio
 */

#ifndef MIDI_H_
#define MIDI_H_

#include <BeagleRT.h>
#include <vector>

typedef unsigned char midi_byte_t;

class Midi {
public:
	Midi();
	/**
	 * Open the specified input Midi port and start reading from it.
	 * @param port Midi port to open
	 * @return 1 on success, -1 on failure
	 */
	int readFrom(int port);
	/**
	 * Open the specified output Midi port and prepares to write to it.
	 * @param port Midi port to open
	 * @return 1 on success, -1 on failure
	 */
	int writeTo(int port);

	/**
	 * Get received midi byte, one at a time.
	 * @return  -1 if no new byte is available, -2 on error,
	 * the oldest not yet retrieved midi byte otherwise
	*/
	int getInput();

	/**
	 * Writes a Midi byte to the output port
	 * @param byte the Midi byte to write
	 * @return 1 on success, -1 on error
	 */
	int writeOutput(midi_byte_t byte);

	/**
	 * Writes Midi bytes to the output port
	 * @param bytes an array of bytes to be written
	 * @param length number of bytes to write
	 * @return 1 on success, -1 on error
	 */
	int writeMidiOut(short unsigned int* bytes, unsigned int length);

	virtual ~Midi();
	static void midiInputLoop();
    static bool staticConstructed;
	static void staticConstructor();
private:
	void readInputLoop();
	int outputPort;
	int inputPort;
	std::vector<midi_byte_t> inputBytes;
	unsigned int inputBytesWritePointer;
	unsigned int inputBytesReadPointer;
	std::vector<midi_byte_t> outputBytes;
	static std::vector<Midi*> objAddrs;
	static AuxiliaryTask midiInputTask;
	static AuxiliaryTask midiOutputTask;
};


#endif /* MIDI_H_ */