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authorUmang Jain <umang.jain@ideasonboard.com>2021-09-29 19:00:30 +0530
committerUmang Jain <umang.jain@ideasonboard.com>2021-09-30 18:28:36 +0530
commitd79b41200199e03834578f5120bb8375bad37aec (patch)
tree95ca99b71cfcd9bb862624c437e1e18135820a2d /.gitignore
parent05c87a36cbad36db55e6a1d59ace7bbd5f6e3691 (diff)
android: camera_device: Send capture results by inspecting the queue
There is a possibility that an out-of-order completion of capture request happens by calling process_capture_result() directly on error paths. The framework expects that errors should be notified as soon as possible, but the request completion order should remain intact. An existing instance of this is abortRequest(), which sends the capture results on flushing state, without considering order-of-completion. Since we have a queue of Camera3RequestDescriptor tracking each capture request placed by framework to libcamera HAL, we should be only sending back capture results from a single location, by inspecting the queue. As per the patch, this now happens in CameraDevice::sendCaptureResults(). Each descriptor is now equipped with its own status to denote whether the capture request is complete and ready to be send back to the framework or needs to be waited upon. This ensures that the order of completion is respected for the requests. Since we are fixing out-of-order request completion in abortRequest(), change the function to read from the Camera3RequestDescriptor directly, instead of camera3_capture_request_t. The descriptor should have all the information necessary to set the request buffers' state to error. Signed-off-by: Umang Jain <umang.jain@ideasonboard.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Hirokazu Honda <hiroh@chromium.org> Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
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