observe Function

@JvmOverloads external fun observe(buffer: ByteArray, width: Int, height: Int, format: Int, rotation: Int = 0, viewfinder: Rect? = null): FrameObserver.Observation

Analyses one camera frame and returns what it found.

Call once per preview frame, from the camera’s analysis thread.

Return

what the observer made of the frame

Parameters

• buffer — the frame pixels, in the layout format describes
• width — the frame width in pixels
• height — the frame height in pixels
• format — the pixel format of buffer
• rotation — how the frame is rotated relative to the display
• viewfinder — the region of the frame the user can actually see

Throws

• NullPointerException — if buffer is null
• IllegalArgumentException — if buffer is too small for the geometry given, if format is unsupported, or if the dimensions are non-positive or, for the YUV formats, odd
• ScanningSdkException — if this observer has been closed, or if the engine fails to process the frame