Merge 3.4 #15806
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Merge 3.4 #15806
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- move TLS & instrumentation code out of core/utility.hpp - (*) TLSData lost .gather() method (to dispose thread data on thread termination) - use TLSDataAccumulator for reliable collecting of thread data - prefer using of .detachData() + .cleanupDetachedData() instead of .gather() method (*) API is broken: replace TLSData => TLSDataAccumulator if gather required (objects disposal on threads termination is not available in accumulator mode)
- OPENCV_TRACE_ITT_ENABLE
* Use circular lut hustory buffer in computeGradient of HOG * Initialize prefetch data outside main loop. Avoid code duplication.
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#15623 from ChipKerchner:optimizeHOGpipeline
#15692 from alalek:core_tls_handle_thread_termination
#15761 from alalek:core_trace_itt_parameter
#15764 from ChipKerchner:demosaicingToHal
#15791 from alalek:android_camera2_issue_14915
#15793 from Cherubin7th:3.4
Previous "Merge 3.4": #15771