The VideoPlayerController class manages visualization of image data and manual changes to keyframes. More...

#include <videoplayercontroller.h>

Inheritance diagram for VideoPlayerController:

Public Slots
void	slot_play ()
	[slot] slot_play() toggles automatic iteration over image sequence.

void	slot_showFirstImage ()
	[slot] slot_showFirstImage() displays first image.

void	slot_showLastImage ()
	[slot] slot_showLastImage() displays last image.

void	slot_showPreviousImage ()
	[slot] slot_showPreviousImage() displays image going one or more steps backward from current image.

void	slot_showNextImage ()
	[slot] slot_showNextImage() displays image going one or more steps forward from current image.

void	slot_toggleKeyframe ()
	[slot] slot_toggleKeyframe() toggles keyframe-state for currently displayed image.

void	slot_toggleKeyframesOnly (bool checked)
	[slot] slot_toggleKeyframesOnly(...) switches between displaying all images or keyframes only.

void	slot_changeStepSize (unsigned int stepsize)
	[slot] slot_changeStepSize(...) changes stepsize for iterating the images.

void	slot_changeIndex (unsigned int index)
	[slot] slot_changeIndex(...) displays the image from DataManager referenced by given index.

void	slot_mipChanged ()
	[slot] slot_mipChanged() is called when image data changed. VideoPlayer and Timeline are updated.

void	slot_deleteKeyframes ()
	[slot] slot_deleteKeyframes() deletes all selected keyframes.

void	slot_deleteAllKeyframes ()
	[slot] slot_deleteAllKeyframes() deletes all keyframes.

void	slot_stopPlay ()
	[slot] slot_stopPlay() stops running videoPlayer.

void	slot_updateBoundaries (QPoint boundaries)
	[slot] slot_updateBoundaries() updates the mip so that the boundaries are up to date

void	slot_resetBoundaries ()
	[slot] slot_resetBoundaries() updates the mip so that the boundaries are back to default

void	slot_imageProcessed (cv::Mat *preview, int id)
	[slot] slot_imageProcessed(...) is invoked when image has been processed and provides additional images.

void	slot_redraw ()
	[slot] slot_redraw() draws selected image again.

void	slot_receiveImage (uint idx, const cv::Mat &img)
	[slot] slot_receiveImage draws given image with and applies a transformable plugin if neccessary

void	slot_displayImage (uint idx, const cv::Mat &img)
	[slot] slot_displayImage diplays img if transformation is enabled

void	slot_selectedITransformChanged (uint id)
	[slot] slot_selectedITransformChanged connects new plugin to videoplayer

void	slot_transformEnabledChanged (bool enabled)
	slot_transformEnabledChanged reads data with new changed enabled parameter

Signals
void	sig_hasStatusMessage (QString message)
	[signal] sig_hasStatusMessage(...) is emitted when VideoPlayerController has a status message to display to the user.

void	sig_imageToProcess (cv::Mat *image, int id)
	[signal] sig_imageToProcess(...) is emitted when VideoPlayer is about to display a new image.

void	sig_read (uint idx)
	[signal] sig_read sends an image request to the worker thread to read the image.

void	sig_sendToITransform (uint idx, const cv::Mat &img, const Resolution &resolution, const ROI &roi)
	[signal] sig_sendToITransform sends the image for processing to the connected ITransforms.

void	sig_toggleKeyframe (uint idx, bool isNowKeyframe)
	[signal] sig_toggleKeyframe notifies about a manual keyframe change by clicking Add keyframe/Remove keyframe

void	sig_deleteKeyframes ()
	[signal] sig_deleteKeyframes is emitted when all keyframes are deleted

void	sig_deleteAllKeyframes ()
	[signal] sig_deleteAllKeyframes is emitted when frames are reseted to be keyframes

Public Member Functions
	VideoPlayerController (QObject parent=nullptr, VideoPlayer player=nullptr, Timeline timeline=nullptr, DataManager dataManager=nullptr, AlgorithmController *algoController=nullptr)
	Creates a VideoPlayerController instance. Connects to the signals from VideoPlayer and Timeline and initializes both with image data from DataManager. Initializes a timer to interrupt periodically.

	~VideoPlayerController ()
	disconnects signals, deletes timer and VideoPlayerController instance.

unsigned int	getImageIndexOnScreen ()
	getImageIndexOnScreen getter for m_imageIndexOnScreen (only used in tests for now)

Detailed Description

The VideoPlayerController class manages visualization of image data and manual changes to keyframes.

The image data is provided by the DataManager *dataManager. For visualization a VideoPlayer *player and a Timeline *timeline are used. The user can select images and modify keyframes using Timeline and VideoPlayer functions which delegate the command to this VideoPlayerController using signals. This VideoPlayerController is tasked with updating the data provided by dataManager as well as refreshing the view-elements (Timeline and VideoPlayer) periodically and after changes to the image data.

Author: Dominik Wüst

Date: 2021/02/10

Constructor & Destructor Documentation

◆ VideoPlayerController()

VideoPlayerController::VideoPlayerController	(	QObject *	parent = `nullptr`,
		VideoPlayer *	player = `nullptr`,
		Timeline *	timeline = `nullptr`,
		DataManager *	dataManager = `nullptr`,
		AlgorithmController *	algoController = `nullptr`
	)

explicit

Creates a VideoPlayerController instance. Connects to the signals from VideoPlayer and Timeline and initializes both with image data from DataManager. Initializes a timer to interrupt periodically.

Parameters

parent	a QWidget as parent in the Qt object hierarchy
player	a VideoPlayer instance to display images
timeline	a Timeline instance to visualize keyframe distribution
dataManager	a DataManager Instance to access image data
algoController	an AlgorithmController instance to transform images and preview them

Member Function Documentation

◆ getImageIndexOnScreen()

unsigned int VideoPlayerController::getImageIndexOnScreen ( )

getImageIndexOnScreen getter for m_imageIndexOnScreen (only used in tests for now)

Returns: index of image currently displayed

◆ sig_hasStatusMessage

void VideoPlayerController::sig_hasStatusMessage ( QString message )

signal

[signal] sig_hasStatusMessage(...) is emitted when VideoPlayerController has a status message to display to the user.

Parameters

message the QString to display.

◆ sig_imageToProcess

void VideoPlayerController::sig_imageToProcess	(	cv::Mat *	image,
		int	id
	)

signal

[signal] sig_imageToProcess(...) is emitted when VideoPlayer is about to display a new image.

Parameters

image	the image thats getting displayed
id	Identifier for the result

◆ sig_read

void VideoPlayerController::sig_read ( uint idx )

signal

[signal] sig_read sends an image request to the worker thread to read the image.

Parameters

idx	The image index

◆ sig_sendToITransform

void VideoPlayerController::sig_sendToITransform	(	uint	idx,
		const cv::Mat &	img,
		const Resolution &	resolution,
		const ROI &	roi
	)

signal

[signal] sig_sendToITransform sends the image for processing to the connected ITransforms.

Parameters

idx	The image index
img	The image to process

◆ sig_toggleKeyframe

void VideoPlayerController::sig_toggleKeyframe	(	uint	idx,
		bool	isNowKeyframe
	)

signal

[signal] sig_toggleKeyframe notifies about a manual keyframe change by clicking Add keyframe/Remove keyframe

Parameters

idx	Index of the changed frame
isNowKeyframe	true if the frame wasn't a keyframe and became one by the user, false otherwise

◆ slot_changeIndex

void VideoPlayerController::slot_changeIndex ( unsigned int index )

slot

[slot] slot_changeIndex(...) displays the image from DataManager referenced by given index.

Parameters

index of image to display

◆ slot_changeStepSize

void VideoPlayerController::slot_changeStepSize ( unsigned int stepsize )

slot

[slot] slot_changeStepSize(...) changes stepsize for iterating the images.

Parameters

stepsize new stepsize

◆ slot_displayImage

void VideoPlayerController::slot_displayImage	(	uint	idx,
		const cv::Mat &	img
	)

slot

[slot] slot_displayImage diplays img if transformation is enabled

Parameters

idx	index if image
img	image

◆ slot_imageProcessed

void VideoPlayerController::slot_imageProcessed	(	cv::Mat *	preview,
		int	id
	)

slot

[slot] slot_imageProcessed(...) is invoked when image has been processed and provides additional images.

Parameters

procesedImgs	The results of image processing
id	Identifier for the result

◆ slot_receiveImage

void VideoPlayerController::slot_receiveImage	(	uint	idx,
		const cv::Mat &	img
	)

slot

[slot] slot_receiveImage draws given image with and applies a transformable plugin if neccessary

Parameters

idx	transformable plugin index
img	image which should be displayed or transformed

◆ slot_selectedITransformChanged

void VideoPlayerController::slot_selectedITransformChanged ( uint id )

slot

[slot] slot_selectedITransformChanged connects new plugin to videoplayer

Parameters

id plugin id

◆ slot_showNextImage

void VideoPlayerController::slot_showNextImage ( )

slot

[slot] slot_showNextImage() displays image going one or more steps forward from current image.

See also: VideoPlayerController::slot_changeStepSize to change stepsize.

◆ slot_showPreviousImage

void VideoPlayerController::slot_showPreviousImage ( )

slot

[slot] slot_showPreviousImage() displays image going one or more steps backward from current image.

See also: VideoPlayerController::slot_changeStepSize to change stepsize.

◆ slot_toggleKeyframesOnly

void VideoPlayerController::slot_toggleKeyframesOnly ( bool checked )

slot

[slot] slot_toggleKeyframesOnly(...) switches between displaying all images or keyframes only.

Parameters

checked display all images if false, keyframes only if true

◆ slot_transformEnabledChanged

void VideoPlayerController::slot_transformEnabledChanged ( bool enabled )

slot

slot_transformEnabledChanged reads data with new changed enabled parameter

Parameters

enabled new enabled parameter

The documentation for this class was generated from the following files:

iVS3D/src/iVS3D-core/controller/videoplayercontroller.h
iVS3D/src/iVS3D-core/controller/videoplayercontroller.cpp

Public Slots

Signals

Public Member Functions

Detailed Description

Constructor & Destructor Documentation

◆ VideoPlayerController()

Member Function Documentation

◆ getImageIndexOnScreen()

◆ sig_hasStatusMessage

◆ sig_imageToProcess

◆ sig_read

◆ sig_sendToITransform

◆ sig_toggleKeyframe

◆ slot_changeIndex

◆ slot_changeStepSize

◆ slot_displayImage

◆ slot_imageProcessed

◆ slot_receiveImage

◆ slot_selectedITransformChanged

◆ slot_showNextImage

◆ slot_showPreviousImage

◆ slot_toggleKeyframesOnly

◆ slot_transformEnabledChanged