Class PcmUtil

java.lang.Object

de.pottgames.tuningfork.misc.PcmUtil

public abstract class PcmUtil
extends Object

Constructor Summary

Constructors

Constructor	Description
PcmUtil()

Method Summary

Modifier and Type	Method	Description
static float	averageSample(byte[] input, PcmFormat format, int startSample, int endSample, int channel)	Calculates the average amplitude of a slice of samples.
static byte[]	reverseAudio(byte[] pcmData, int sampleSizeInBytes)	Reverses the audio data.

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

PcmUtil

public PcmUtil()

Method Details

reverseAudio

public static byte[] reverseAudio(byte[] pcmData,
 int sampleSizeInBytes)

Reverses the audio data.

Parameters:

pcmData - the source array of pcm data

sampleSizeInBytes - the bytes per sample

Returns:

the reversed audio data

averageSample

public static float averageSample(byte[] input,
 PcmFormat format,
 int startSample,
 int endSample,
 int channel)

Calculates the average amplitude of a slice of samples. The result is always in the range 0 - 1. With 0 equals silence and 1 equals full amplitude.

Parameters:

input - the input byte array containing the samples

format - the data format of the input byte array

startSample - the start index of the desired slice

endSample - the end index of the desired slice

channel - the channel number samples will be read from

Returns:

the average amplitude of all samples in the slice in the range 0 - 1