metdetection.time

Class Tempo

java.lang.Object

metdetection.time.Tempo

public class Tempo
extends java.lang.Object

A Tempo object tracks the speed of the music data. That is, the rate at which quarter notes occur.

Author:

Andrew McLeod - 11 Feb, 2015

Field Summary

Fields

Modifier and Type	Field and Description
private int	microSecondsPerQuarter The number of microseconds which pass per quarter note in the song.

Constructor Summary

Constructors

Constructor and Description
Tempo() Create a default tempo - 120 QPM
Tempo(byte[] data) Create a new Tempo from the given data array.
Tempo(int qpm) Create a new Tempo with the given number of quarter notes per minute.

Method Summary

Methods

Modifier and Type	Method and Description
static int	calculateMicroSecondsPerQuarter(byte[] data) Calculate the number of microseconds per quarter note based on the given data array.
boolean	equals(java.lang.Object other)
int	getMicroSecondsPerQuarter() Gets the number of microseconds which pass per quarter note.
int	hashCode()
java.lang.String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

microSecondsPerQuarter

private final int microSecondsPerQuarter

The number of microseconds which pass per quarter note in the song.

Constructor Detail

Tempo

public Tempo()

Create a default tempo - 120 QPM

Tempo

public Tempo(byte[] data)

Create a new Tempo from the given data array.

Parameters:

data -

See Also:

calculateMicroSecondsPerQuarter(byte[])

Tempo

public Tempo(int qpm)

Create a new Tempo with the given number of quarter notes per minute.

Parameters:

qpm - The number of quarter notes per minute.

Method Detail

getMicroSecondsPerQuarter

public int getMicroSecondsPerQuarter()

Gets the number of microseconds which pass per quarter note.

Returns:

microSecondsPerQuarter

calculateMicroSecondsPerQuarter

public static int calculateMicroSecondsPerQuarter(byte[] data)

Calculate the number of microseconds per quarter note based on the given data array. It is really just an int, where the highest byte is data[0], and the lowest byte is data[3].

Parameters:

data - The Midi byte array of the tempo data for microseconds/quarter. It is actually just represented as an int, but it is grabbed from the file as a byte array, so we need this conversion.

Returns:

The number of microseconds per quarter note of the given data

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

equals

public boolean equals(java.lang.Object other)

Overrides:

equals in class java.lang.Object