com.sun.j3d.audioengines

Class AudioEngine3DL2

java.lang.Object

com.sun.j3d.audioengines.AudioEngine

com.sun.j3d.audioengines.AudioEngine3D

com.sun.j3d.audioengines.AudioEngine3DL2

All Implemented Interfaces:

javax.media.j3d.AudioDevice, javax.media.j3d.AudioDevice3D, javax.media.j3d.AudioDevice3DL2

Direct Known Subclasses:

JavaSoundMixer

public abstract class AudioEngine3DL2
extends AudioEngine3D
implements javax.media.j3d.AudioDevice3DL2

The AudioEngine3DL2 Class defines an audio output device that generates sound 'image' from high-level sound parameters passed to it during scene graph.

The methods in this class are meant to be optionally overridden by an extended class. This extended class would provice device specific code.

Error checking on all parameters passed to these methods is already explicitly being done by the Java 3D core code that calls these methods.

These methods should NOT be called by any application if the audio engine is associated with a Physical Environment used by Java3D Core.

Since:

Java 3D 1.3

Field Summary

Fields inherited from class com.sun.j3d.audioengines.AudioEngine3D

attribs, currentView, samples

Fields inherited from interface javax.media.j3d.AudioDevice3D

BACKGROUND_SOUND, BUFFERED_AUDIO_DATA, CONE_SOUND, POINT_SOUND, STREAMING_AUDIO_DATA

Fields inherited from interface javax.media.j3d.AudioDevice

HEADPHONES, MONO_SPEAKER, STEREO_SPEAKERS

Constructor Summary

Constructors

Constructor and Description
AudioEngine3DL2(javax.media.j3d.PhysicalEnvironment physicalEnvironment) Construct a new AudioEngine3DL2 with the specified PhysicalEnvironment.

Method Summary

Methods

Modifier and Type	Method and Description
abstract void	pause() Pauses audio device engine without closing the device and associated threads.
abstract void	resume() Resumes audio device engine (if previously paused) without reinitializing the device.
void	setDecayFilter(float frequencyCutoff) Set reverb decay filter.
void	setDecayTime(float time) Set reverb decay time.
void	setDensity(float density) Set reverb density.
void	setDiffusion(float diffusion) Set reverb diffusion.
abstract void	setGain(float scaleFactor) Set overall gain control of all sounds playing on the audio device.
void	setObstructionFilter(int index, float frequencyCutoff) Set the obstruction filter control.
void	setObstructionGain(int index, float scaleFactor) Set the obstruction gain control.
void	setOcclusionFilter(int index, float frequencyCutoff) Set the occlusion filter control.
void	setOcclusionGain(int index, float scaleFactor) Set the occlusion gain control.
void	setRateScaleFactor(int index, float scaleFactor) Set scale factor applied to sample playback rate for a particular sound associated with the audio device.
void	setReflectionDelay(float reflectionDelay) Sets the early reflection delay time.
void	setReverbCoefficient(float coefficient) Set late reflection (referred to as 'reverb') attenuation.

Methods inherited from class com.sun.j3d.audioengines.AudioEngine3D

clearSound, getAuralParameters, getNumberOfChannelsUsed, getNumberOfChannelsUsed, getSample, getSampleDuration, getSampleList, getSampleListSize, getStartTime, getView, muteSample, pauseSample, prepareSound, setAngularAttenuation, setDirection, setDistanceFilter, setDistanceGain, setFrequencyScaleFactor, setLoop, setPosition, setReflectionCoefficient, setReverbDelay, setReverbOrder, setRolloff, setSampleGain, setVelocityScaleFactor, setView, setVworldXfrm, startSample, stopSample, unmuteSample, unpauseSample, updateSample

Methods inherited from class com.sun.j3d.audioengines.AudioEngine

close, getAngleOffsetToSpeaker, getAudioPlaybackType, getCenterEarToSpeaker, getChannelsAvailable, getChannelsUsedForSound, getTotalChannels, initialize, setAngleOffsetToSpeaker, setAudioPlaybackType, setCenterEarToSpeaker

Methods inherited from class java.lang.Object

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

Methods inherited from interface javax.media.j3d.AudioDevice3D

clearSound, getNumberOfChannelsUsed, getNumberOfChannelsUsed, getSampleDuration, getStartTime, muteSample, pauseSample, prepareSound, setAngularAttenuation, setDirection, setDistanceFilter, setDistanceGain, setFrequencyScaleFactor, setLoop, setPosition, setReflectionCoefficient, setReverbDelay, setReverbOrder, setRolloff, setSampleGain, setVelocityScaleFactor, setView, setVworldXfrm, startSample, stopSample, unmuteSample, unpauseSample, updateSample

Methods inherited from interface javax.media.j3d.AudioDevice

close, getAngleOffsetToSpeaker, getAudioPlaybackType, getCenterEarToSpeaker, getChannelsAvailable, getChannelsUsedForSound, getTotalChannels, initialize, setAngleOffsetToSpeaker, setAudioPlaybackType, setCenterEarToSpeaker

Constructor Detail

AudioEngine3DL2

public AudioEngine3DL2(javax.media.j3d.PhysicalEnvironment physicalEnvironment)

Construct a new AudioEngine3DL2 with the specified PhysicalEnvironment.

Parameters:

physicalEnvironment - the physical environment object where we want access to this device.

Method Detail

pause

public abstract void pause()

Pauses audio device engine without closing the device and associated threads. Causes all cached sounds to be paused and all streaming sounds to be stopped.

Specified by:

pause in interface javax.media.j3d.AudioDevice3DL2

resume

public abstract void resume()

Resumes audio device engine (if previously paused) without reinitializing the device. Causes all paused cached sounds to be resumed and all streaming sounds restarted.

Specified by:

resume in interface javax.media.j3d.AudioDevice3DL2

setGain

public abstract void setGain(float scaleFactor)

Set overall gain control of all sounds playing on the audio device.

Specified by:

setGain in interface javax.media.j3d.AudioDevice3DL2

Parameters:

scaleFactor - scale factor applied to calculated amplitudes for all sounds playing on this device

setRateScaleFactor

public void setRateScaleFactor(int index,
                      float scaleFactor)

Set scale factor applied to sample playback rate for a particular sound associated with the audio device. Changing the device sample rate affects both the pitch and speed. This scale factor is applied to ALL sound types. Changes (scales) the playback rate of a sound independent of Doppler rate changes.

Specified by:

setRateScaleFactor in interface javax.media.j3d.AudioDevice3DL2

Parameters:

index - device specific reference to device driver sample

scaleFactor - non-negative factor applied to calculated amplitudes for all sounds playing on this device

See Also:

Sound.setRateScaleFactor(float)

setReverbCoefficient

public void setReverbCoefficient(float coefficient)

Set late reflection (referred to as 'reverb') attenuation. This scale factor is applied to iterative, indistinguishable late reflections that constitute the tail of reverberated sound in the aural environment. This parameter, along with the early reflection coefficient, defines the reflective/absorptive characteristic of the surfaces in the current listening region.

Specified by:

setReverbCoefficient in interface javax.media.j3d.AudioDevice3DL2

Parameters:

coefficient - late reflection attenuation factor

See Also:

AuralAttributes.setReverbCoefficient(float)

setReflectionDelay

public void setReflectionDelay(float reflectionDelay)

Sets the early reflection delay time. In this form, the parameter specifies the delay time between each order of reflection (while reverberation is being rendered) explicitly given in milliseconds.

Specified by:

setReflectionDelay in interface javax.media.j3d.AudioDevice3DL2

Parameters:

reflectionDelay - time between each order of early reflection

See Also:

AuralAttributes.setReflectionDelay(float)

setDecayTime

public void setDecayTime(float time)

Set reverb decay time. Defines the reverberation decay curve.

Specified by:

setDecayTime in interface javax.media.j3d.AudioDevice3DL2

Parameters:

time - decay time in milliseconds

See Also:

AuralAttributes.setDecayTime(float)

setDecayFilter

public void setDecayFilter(float frequencyCutoff)

Set reverb decay filter. This provides for frequencies above the given cutoff frequency to be attenuated during reverb decay at a different rate than frequencies below this value. Thus, defining a different reverb decay curve for frequencies above the cutoff value.

Specified by:

setDecayFilter in interface javax.media.j3d.AudioDevice3DL2

Parameters:

frequencyCutoff - value of frequencies in Hertz above which a low-pass filter is applied.

See Also:

AuralAttributes.setDecayFilter(float)

setDiffusion

public void setDiffusion(float diffusion)

Set reverb diffusion. This defines the echo dispersement (also referred to as 'echo density'). The value of this reverb parameter is expressed as a percent of the audio device's minimum-to-maximum values.

Specified by:

setDiffusion in interface javax.media.j3d.AudioDevice3DL2

Parameters:

diffusion - percentage expressed within the range of 0.0 and 1.0

See Also:

AuralAttributes.setDiffusion(float)

setDensity

public void setDensity(float density)

Set reverb density. This defines the modal density (also referred to as 'spectral coloration'). The value of this parameter is expressed as a percent of the audio device's minimum-to-maximum values for this reverb parameter.

Specified by:

setDensity in interface javax.media.j3d.AudioDevice3DL2

Parameters:

density - reverb density expressed as a percentage, within the range of 0.0 and 1.0

See Also:

AuralAttributes.setDensity(float)

setObstructionGain

public void setObstructionGain(int index,
                      float scaleFactor)

Set the obstruction gain control. This method allows for attenuating sound waves traveling between the sound source and the listener obstructed by objects. Direct sound signals/waves for obstructed sound source are attenuated but not indirect (reflected) waves. There is no corresponding Core AuralAttributes method at this time.

Specified by:

setObstructionGain in interface javax.media.j3d.AudioDevice3DL2

Parameters:

index - device specific reference to device driver sample

scaleFactor - non-negative factor applied to direct sound gain

setObstructionFilter

public void setObstructionFilter(int index,
                        float frequencyCutoff)

Set the obstruction filter control. This provides for frequencies above the given cutoff frequency to be attenuated, during while the gain of an obstruction signal is being calculated, at a different rate than frequencies below this value. There is no corresponding Core AuralAttributes method at this time.

Specified by:

setObstructionFilter in interface javax.media.j3d.AudioDevice3DL2

Parameters:

index - device specific reference to device driver sample

frequencyCutoff - value of frequencies in Hertz above which a low-pass filter is applied.

setOcclusionGain

public void setOcclusionGain(int index,
                    float scaleFactor)

Set the occlusion gain control. This method allows for attenuating sound waves traveling between the sound source and the listener occluded by objects. Both direct and indirect sound signals/waves for occluded sound sources are attenuated. There is no corresponding Core AuralAttributes method at this time.

Specified by:

setOcclusionGain in interface javax.media.j3d.AudioDevice3DL2

Parameters:

index - device specific reference to device driver sample

scaleFactor - non-negative factor applied to direct sound gain

setOcclusionFilter

public void setOcclusionFilter(int index,
                      float frequencyCutoff)

Set the occlusion filter control. This provides for frequencies above the given cutoff frequency to be attenuated, during while the gain of an occluded signal is being calculated, at a different rate than frequencies below this value. There is no corresponding Core AuralAttributes method at this time.

Specified by:

setOcclusionFilter in interface javax.media.j3d.AudioDevice3DL2

Parameters:

index - device specific reference to device driver sample

frequencyCutoff - value of frequencies in Hertz above which a low-pass filter is applied.