pynq_composable.apps Module

The pynq_composable.apps provides a high level API to create applications based on the composable video pipeline. This module also provides pre-configured applications.

class pynq_composable.apps.ColorDetect(bitfile_name, source: pynq_composable.video.VSource = VSource.HDMI, sink: pynq_composable.video.VSink = VSink.HDMI, file: int = 0, videomode: Optional[pynq.lib.video.common.VideoMode] = None)

Bases: pynq_composable.apps.PipelineApp

This class wraps the functionality to implement the color detect video pipeline application https://xilinx.github.io/Vitis_Libraries/vision/2020.2/overview.html#id9

play()

Exposes runtime configurations to the user

Displays nine slides to change the thresholding range for three colors on the three channels

class pynq_composable.apps.CornerDetect(bitfile_name, source: pynq_composable.video.VSource = VSource.HDMI, sink: pynq_composable.video.VSink = VSink.HDMI, file: int = 0, videomode: Optional[pynq.lib.video.common.VideoMode] = None)

Bases: pynq_composable.apps.PipelineApp

This class wraps the functionality to implement the corner detection video pipeline application

play()

Exposes runtime configurations to the user

Displays one drop down menu to select the Corner Detect Algorithm. It also displays two sliders to change the the threshold and K value for the algorithms.

class pynq_composable.apps.DifferenceGaussians(bitfile_name, source: pynq_composable.video.VSource = VSource.HDMI, sink: pynq_composable.video.VSink = VSink.HDMI, file: int = 0, videomode: Optional[pynq.lib.video.common.VideoMode] = None)

Bases: pynq_composable.apps.PipelineApp

This class wraps the functionality to implement the Difference of Gaussian filter video pipeline application https://xilinx.github.io/Vitis_Libraries/vision/2020.2/overview.html#difference-gaussian-filter

play()

Exposes runtime configurations to the user Displays two sliders to change the sigma value of each Gaussian Filter

class pynq_composable.apps.Filter2DApp(bitfile_name, source: pynq_composable.video.VSource = VSource.HDMI)

Bases: pynq_composable.apps.PipelineApp

This class wraps the functionality to implement the Filter2D IP in and expose kernel configurability through the buttons on the board

play()

Exposes runtime configurations to the user

Enables user iteration by changing the on board buttons

stop()

Stops the pipeline

class pynq_composable.apps.InterruptTimer(interval, function, *args, **kwargs)

Bases: object

Threaded interrupt

This class encapsulates a threaded interrupt that gets a function and executes it when the timer times out

start()

Start background task

stop()

Stop background task

class pynq_composable.apps.LutApp(bitfile_name, source: pynq_composable.video.VSource = VSource.HDMI)

Bases: pynq_composable.apps.PipelineApp

This class wraps the functionality to implement the LUT IP and expose kernel configurability through the switches on the board

play()

Exposes runtime configurations to the user

Enables user iteration by changing the on board switches

stop()

Stops the pipeline

class pynq_composable.apps.PipelineApp(bitfile_name, source: pynq_composable.video.VSource = VSource.HDMI, sink: pynq_composable.video.VSink = VSink.HDMI, file: int = 0, videomode: Optional[pynq.lib.video.common.VideoMode] = None)

Bases: object

Base class to expose common pipeline methods

This class wraps the common functionality for the different applications, these methods are:

• start: configures and starts the pipeline

• stop: stops the pipeline

• play: exposes runtime configuration to the user

property graph

Return DAG

play()

Exposes runtime configurations to the user

Each child should implement its own version of play to expose runtime configurations to the users

start()

Starts the pipeline

Start the HDMI, compose the pipeline and return the graph

stop()

Stops the pipeline