Class DefaultAudioSpectrogramProvider

java.lang.Object

org.episteme.core.media.audio.providers.DefaultAudioSpectrogramProvider

All Implemented Interfaces:

AudioSpectrogramProvider, AlgorithmProvider

@AutoService(AudioSpectrogramProvider.class)
public class DefaultAudioSpectrogramProvider
extends Object
implements AudioSpectrogramProvider

Default implementation of AudioSpectrogramProvider using FFTProvider.

Author:

Gemini AI (Google DeepMind)

Constructor Summary

Constructors

Constructor	Description
DefaultAudioSpectrogramProvider()

Method Summary

Modifier and Type	Method	Description
double[]	calculateSpectrum(double[] buffer, AudioSpectrogram.WindowFunction window)	Calculates the magnitude spectrum of a buffer.
float[]	calculateSpectrum(float[] buffer, AudioSpectrogram.WindowFunction window)	Calculates the magnitude spectrum of a buffer.
List<double[]>	computeSpectrogram(double[] audioData, int windowSize, int overlap, AudioSpectrogram.WindowFunction window)	Computes a full spectrogram (list of spectrums) for a long buffer.
List<float[]>	computeSpectrogram(float[] audioData, int windowSize, int overlap, AudioSpectrogram.WindowFunction window)	Computes a full spectrogram (list of spectrums) for a long buffer.
String	getName()

Methods inherited from class Object

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

Methods inherited from interface AlgorithmProvider

description, getMetadata, getPriority, isAvailable, score, shutdown

Methods inherited from interface AudioSpectrogramProvider

getAlgorithmType

Constructor Details

DefaultAudioSpectrogramProvider

public DefaultAudioSpectrogramProvider()

Method Details

getName

public String getName()

Specified by:

getName in interface AlgorithmProvider

calculateSpectrum

public float[] calculateSpectrum(float[] buffer,
 AudioSpectrogram.WindowFunction window)

Description copied from interface: AudioSpectrogramProvider

Calculates the magnitude spectrum of a buffer.

Specified by:

calculateSpectrum in interface AudioSpectrogramProvider

Parameters:

buffer - Input audio data.

window - Window function to apply.

Returns:

Magnitude spectrum (half size of buffer if buffer is power of 2).

computeSpectrogram

public List<float[]> computeSpectrogram(float[] audioData,
 int windowSize,
 int overlap,
 AudioSpectrogram.WindowFunction window)

Description copied from interface: AudioSpectrogramProvider

Computes a full spectrogram (list of spectrums) for a long buffer.

Specified by:

computeSpectrogram in interface AudioSpectrogramProvider

Parameters:

audioData - Full audio data.

windowSize - Size of the analysis window.

overlap - Overlap between consecutive windows.

window - Window function to apply.

Returns:

List of magnitude spectrums.

calculateSpectrum

public double[] calculateSpectrum(double[] buffer,
 AudioSpectrogram.WindowFunction window)

Description copied from interface: AudioSpectrogramProvider

Calculates the magnitude spectrum of a buffer.

Specified by:

calculateSpectrum in interface AudioSpectrogramProvider

Parameters:

buffer - Input audio data.

window - Window function to apply.

Returns:

Magnitude spectrum (half size of buffer if buffer is power of 2).

computeSpectrogram

public List<double[]> computeSpectrogram(double[] audioData,
 int windowSize,
 int overlap,
 AudioSpectrogram.WindowFunction window)

Description copied from interface: AudioSpectrogramProvider

Computes a full spectrogram (list of spectrums) for a long buffer.

Specified by:

computeSpectrogram in interface AudioSpectrogramProvider

Parameters:

audioData - Full audio data.

windowSize - Size of the analysis window.

overlap - Overlap between consecutive windows.

window - Window function to apply.

Returns:

List of magnitude spectrums.