/*
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* Copyright (c) 2021 by Allwinnertech Co., Ltd.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef DEFAULT_CAMERA_HAL_REQUEST_TRACKER_H_
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#define DEFAULT_CAMERA_HAL_REQUEST_TRACKER_H_
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#include <hardware/camera3.h>
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#include <map>
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#include <memory>
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#include <set>
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#include "capture_request.h"
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#include "common.h"
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namespace default_camera_hal {
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// Keep track of what requests and streams are in flight.
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class RequestTracker {
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public:
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RequestTracker();
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virtual ~RequestTracker();
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// Configuration methods. Both have undefined effects on in-flight requests,
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// and should only be called when empty.
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// Add configured streams. Replaces the previous configuration if any.
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virtual void SetStreamConfiguration(
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const camera3_stream_configuration_t& config);
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// Reset to no configured streams.
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virtual void ClearStreamConfiguration();
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// Tracking methods.
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// Track a request.
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// False if a request of the same frame number is already being tracked
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virtual bool Add(std::shared_ptr<CaptureRequest> request);
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// Stop tracking a request.
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// False if the given request is not being tracked.
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virtual bool Remove(std::shared_ptr<CaptureRequest> request = nullptr);
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// Empty out all requests being tracked.
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virtual void Clear(
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std::set<std::shared_ptr<CaptureRequest>>* requests = nullptr);
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// Accessors to check availability.
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// Check that a request isn't already in flight, and won't overflow any
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// streams.
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virtual bool CanAddRequest(const CaptureRequest& request) const;
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// True if the given stream is already at max capacity.
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virtual bool StreamFull(const camera3_stream_t* handle) const;
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// True if a request is being tracked for the given frame number.
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virtual bool InFlight(uint32_t frame_number) const;
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// True if no requests being tracked.
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virtual bool Empty() const;
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private:
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// Track for each stream, how many buffers are in flight.
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std::map<const camera3_stream_t*, size_t> buffers_in_flight_;
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// Track the frames in flight.
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std::map<uint32_t, std::shared_ptr<CaptureRequest>> frames_in_flight_;
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DISALLOW_COPY_AND_ASSIGN(RequestTracker);
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};
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} // namespace default_camera_hal
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#endif // DEFAULT_CAMERA_HAL_REQUEST_TRACKER_H_
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