boofcv.android.camera

Interface VideoProcessing

All Known Implementing Classes:

VideoImageProcessing, VideoRenderProcessing

public interface VideoProcessing

Interface for processing and visualizing camera previews on Android devices. VideoDisplayActivity class handles all the low level Android boiler plate for capturing and displaying video data. When new a new frame arrives convertPreview(byte[], android.hardware.Camera) is called and very little time can be sent in this function or else the application will crash. When the view is ready to be updated onDraw(android.graphics.Canvas) is called, which should be executed quickly to avoid slowing down the GUI. To accomplish for of these speed requirements it is recommended that a new thread be launched and used to process incoming video data and compute the output.

See Also:

VideoImageProcessing, VideoRenderProcessing

Method Summary

Modifier and Type	Method and Description
void	convertPreview(byte[] bytes, android.hardware.Camera camera) Called inside the camera preview thread after new data has arrived.
void	init(android.view.View view, android.hardware.Camera camera, android.hardware.Camera.CameraInfo info, int rotation)
void	onDraw(android.graphics.Canvas canvas) Invoked by Android GUI thread.
void	stopProcessing() Blocks until all processing has stopped

Method Detail

init

void init(android.view.View view,
          android.hardware.Camera camera,
          android.hardware.Camera.CameraInfo info,
          int rotation)

onDraw

void onDraw(android.graphics.Canvas canvas)

Invoked by Android GUI thread. Should be run as fast as possible to avoid making the GUI feel sluggish.

Parameters:

canvas - Use this canvas to draw results onto. Already be adjusted for the display and camera preview size. .

convertPreview

void convertPreview(byte[] bytes,
                    android.hardware.Camera camera)

Called inside the camera preview thread after new data has arrived. Must be as fast as possible to avoid crashing the application. Just convert the NV21 data into a more useful format

Parameters:

bytes - Data from preview image in NV21 format.

camera - Reference to camera

stopProcessing

void stopProcessing()

Blocks until all processing has stopped