ProcessFrameDelegate Interface Reference
Public Member Functions | |
void | DidCaptureImage (BarcodePicker barcodePicker, CMSampleBuffer frame, IScanSession session) |
Detailed Description
Protocol for accessing the processed sample buffers.
- Since
- 4.7.0
Member Function Documentation
void DidCaptureImage | ( | BarcodePicker | barcodePicker, |
CMSampleBuffer | frame, | ||
IScanSession | session | ||
) |
Method invoked whenever a frame has been processed by the barcode scanner.
This method is called on the ProcessFrameDelegate whenever the barcode scanner has finished processing a frame.
- Parameters
-
barcodePicker the barcode picker instance that processed the frame frame the sample buffer containing the actual frame data. session The current scan session containing the state of the recognition process, e.g. list of codes recognized in the last processed frame. The scan session can only be accessed from within this method. It is however possible to use codes returned by ScanSession.NewlyRecognizedCodes outside this method.
This method is invoked from a picker-internal dispatch queue. To perform UI work, you must dispatch to the main queue first. When new codes have been recognized, this method is invoked after ScanDelegate::barcodePicker:didScan is called on the BarcodePicker::scanDelegate.
- Warning
- You must call Dispose on the frame when you are done using it, e.g. typically before returning from this delegate method. The system has a limited pool of video frames, and once it runs out of those buffers, the system will stop calling this method until the buffers are released.