Class MulticoreVideoBackend

java.lang.Object

org.episteme.core.media.video.backends.MulticoreVideoBackend

All Implemented Interfaces:

VideoAlgorithmProvider, VideoBackend, AlgorithmProvider, Backend, ComputeBackend, CPUBackend

@AutoService({Backend.class,ComputeBackend.class,VideoBackend.class,VideoAlgorithmProvider.class,CPUBackend.class})
public class MulticoreVideoBackend
extends Object
implements VideoBackend, CPUBackend

Multicore CPU Video Backend using Java Parallel Streams for analysis.

Constructor Summary

Constructors

Constructor	Description
MulticoreVideoBackend()

Method Summary

Modifier and Type	Method	Description
Object	createBackend()	Creates and returns the backend instance (or returns self if it is the backend).
SceneTransitionDetector.Transition	detectMotion(float[][] prev, float[][] curr, float threshold)	Detects motion between two frames.
List<SceneTransitionDetector.Transition>	detectTransitions(List<float[][]> frames, double threshold)	Detects scene transitions in a list of frames.
HardwareAccelerator	getAcceleratorType()	Returns the type of hardware accelerator used by this backend.
String	getBackendName()	Returns the friendly name of this backend instance.
String	getDescription()	Returns a description of the backend.
double	getDuration()
String	getId()	Returns the unique identifier for this backend (e.g., "javafx", "jmol", "cuda").
int	getPriority()	Returns the priority for auto-selection (higher = preferred).
double	getTime()
String	getType()	Returns the backend type category (e.g., "plotting", "molecular", "tensor", "math").
<T> T	grabFrame()	Grabs the current frame as an image.
boolean	isAvailable()	Checks if this backend is currently available (libraries loaded, etc.).
void	load(String path)	Loads a video resource.
void	pause()
void	play()
void	shutdown()	Called when the application is shutting down or the backend is being replaced.
void	stop()

Methods inherited from class Object

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

Methods inherited from interface AlgorithmProvider

description, getMetadata, score

Methods inherited from interface Backend

getAlgorithmProviders, getStatusMessage, isExplicitlyDisabled

Methods inherited from interface CPUBackend

supportsComplexNumbers, supportsFloatingPoint, supportsParallelOps

Methods inherited from interface VideoAlgorithmProvider

getAlgorithmType

Methods inherited from interface VideoBackend

createContext, getName

Constructor Details

MulticoreVideoBackend

public MulticoreVideoBackend()

Method Details

getType

public String getType()

Description copied from interface: Backend

Returns the backend type category (e.g., "plotting", "molecular", "tensor", "math").

Specified by:

getType in interface Backend

Specified by:

getType in interface ComputeBackend

Specified by:

getType in interface CPUBackend

Specified by:

getType in interface VideoBackend

getId

public String getId()

Description copied from interface: Backend

Returns the unique identifier for this backend (e.g., "javafx", "jmol", "cuda").

Specified by:

getId in interface Backend

Specified by:

getId in interface ComputeBackend

Specified by:

getId in interface VideoBackend

getBackendName

public String getBackendName()

Description copied from interface: VideoBackend

Returns the friendly name of this backend instance.

Specified by:

getBackendName in interface VideoBackend

getDescription

public String getDescription()

Description copied from interface: Backend

Returns a description of the backend.

Specified by:

getDescription in interface Backend

Specified by:

getDescription in interface ComputeBackend

Specified by:

getDescription in interface VideoBackend

isAvailable

public boolean isAvailable()

Description copied from interface: Backend

Checks if this backend is currently available (libraries loaded, etc.).

Default implementation checks Backend.isExplicitlyDisabled() and returns false if it is.

Specified by:

isAvailable in interface AlgorithmProvider

Specified by:

isAvailable in interface Backend

Specified by:

isAvailable in interface VideoBackend

getPriority

public int getPriority()

Description copied from interface: Backend

Returns the priority for auto-selection (higher = preferred). Used when multiple backends are available.

Specified by:

getPriority in interface AlgorithmProvider

Specified by:

getPriority in interface Backend

Specified by:

getPriority in interface VideoBackend

createBackend

public Object createBackend()

Description copied from interface: Backend

Creates and returns the backend instance (or returns self if it is the backend).

Specified by:

createBackend in interface Backend

Specified by:

createBackend in interface ComputeBackend

Specified by:

createBackend in interface VideoBackend

Returns:

The backend implementation object

getAcceleratorType

public HardwareAccelerator getAcceleratorType()

Description copied from interface: ComputeBackend

Returns the type of hardware accelerator used by this backend.

Specified by:

getAcceleratorType in interface ComputeBackend

Specified by:

getAcceleratorType in interface CPUBackend

Specified by:

getAcceleratorType in interface VideoBackend

Returns:

the accelerator type

load

public void load(String path)
          throws Exception

Description copied from interface: VideoBackend

Loads a video resource.

Specified by:

load in interface VideoBackend

Parameters:

path - File path or URL

Throws:

Exception

play

public void play()

Specified by:

play in interface VideoBackend

pause

public void pause()

Specified by:

pause in interface VideoBackend

stop

public void stop()

Specified by:

stop in interface VideoBackend

getTime

public double getTime()

Specified by:

getTime in interface VideoBackend

getDuration

public double getDuration()

Specified by:

getDuration in interface VideoBackend

grabFrame

public <T> T grabFrame()

Description copied from interface: VideoBackend

Grabs the current frame as an image.

Specified by:

grabFrame in interface VideoBackend

Type Parameters:

T - the image type

Returns:

the current frame

detectMotion

public SceneTransitionDetector.Transition detectMotion(float[][] prev,
 float[][] curr,
 float threshold)

Description copied from interface: VideoAlgorithmProvider

Detects motion between two frames.

Specified by:

detectMotion in interface VideoAlgorithmProvider

Parameters:

prev - Gray frame (float[][])

curr - Gray frame (float[][])

threshold - Sensitivity threshold

Returns:

Motion result

detectTransitions

public List<SceneTransitionDetector.Transition> detectTransitions(List<float[][]> frames,
 double threshold)

Description copied from interface: VideoAlgorithmProvider

Detects scene transitions in a list of frames.

Specified by:

detectTransitions in interface VideoAlgorithmProvider

Parameters:

frames - List of gray frames (float[][])

threshold - Sensitivity threshold

Returns:

List of transitions

shutdown

public void shutdown()

Description copied from interface: Backend

Called when the application is shutting down or the backend is being replaced. Use this to release hardware resources, close file handles, or stop background threads.

Specified by:

shutdown in interface AlgorithmProvider

Specified by:

shutdown in interface Backend

Specified by:

shutdown in interface VideoBackend