1 /* 2 * Copyright (C) 2016 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef DEFAULT_CAMERA_HAL_REQUEST_TRACKER_H_ 18 #define DEFAULT_CAMERA_HAL_REQUEST_TRACKER_H_ 19 20 #include <map> 21 #include <memory> 22 #include <set> 23 24 #include <android-base/macros.h> 25 #include <hardware/camera3.h> 26 #include "capture_request.h" 27 28 namespace default_camera_hal { 29 30 // Keep track of what requests and streams are in flight. 31 class RequestTracker { 32 public: 33 RequestTracker(); 34 virtual ~RequestTracker(); 35 36 // Configuration methods. Both have undefined effects on in-flight requests, 37 // and should only be called when empty. 38 // Add configured streams. Replaces the previous configuration if any. 39 virtual void SetStreamConfiguration( 40 const camera3_stream_configuration_t& config); 41 // Reset to no configured streams. 42 virtual void ClearStreamConfiguration(); 43 44 // Tracking methods. 45 // Track a request. 46 // False if a request of the same frame number is already being tracked 47 virtual bool Add(std::shared_ptr<CaptureRequest> request); 48 // Stop tracking a request. 49 // False if the given request is not being tracked. 50 virtual bool Remove(std::shared_ptr<CaptureRequest> request = nullptr); 51 // Empty out all requests being tracked. 52 virtual void Clear( 53 std::set<std::shared_ptr<CaptureRequest>>* requests = nullptr); 54 55 // Accessors to check availability. 56 // Check that a request isn't already in flight, and won't overflow any 57 // streams. 58 virtual bool CanAddRequest(const CaptureRequest& request) const; 59 // True if the given stream is already at max capacity. 60 virtual bool StreamFull(const camera3_stream_t* handle) const; 61 // True if a request is being tracked for the given frame number. 62 virtual bool InFlight(uint32_t frame_number) const; 63 // True if no requests being tracked. 64 virtual bool Empty() const; 65 66 private: 67 // Track for each stream, how many buffers are in flight. 68 std::map<const camera3_stream_t*, size_t> buffers_in_flight_; 69 // Track the frames in flight. 70 std::map<uint32_t, std::shared_ptr<CaptureRequest>> frames_in_flight_; 71 72 DISALLOW_COPY_AND_ASSIGN(RequestTracker); 73 }; 74 75 } // namespace default_camera_hal 76 77 #endif // DEFAULT_CAMERA_HAL_REQUEST_TRACKER_H_ 78
