services/camera/libcameraservice/utils/CameraServiceProxyWrapper.h

/*
 * Copyright (C) 2020 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef ANDROID_SERVERS_CAMERA_SERVICE_PROXY_WRAPPER_H_
#define ANDROID_SERVERS_CAMERA_SERVICE_PROXY_WRAPPER_H_

#include <android/hardware/ICameraServiceProxy.h>

#include <utils/Mutex.h>
#include <utils/String8.h>
#include <utils/String16.h>
#include <utils/StrongPointer.h>
#include <utils/Timers.h>

#include <camera/CameraSessionStats.h>

namespace android {

class CameraServiceProxyWrapper {
private:
    // Guard mCameraServiceProxy
    static Mutex sProxyMutex;
    // Cached interface to the camera service proxy in system service
    static sp<hardware::ICameraServiceProxy> sCameraServiceProxy;

    struct CameraSessionStatsWrapper {
        hardware::CameraSessionStats mSessionStats;
        Mutex mLock; // lock for per camera session stats

        CameraSessionStatsWrapper(const String16& cameraId, int facing, int newCameraState,
                const String16& clientName, int apiLevel, bool isNdk, int32_t latencyMs) :
            mSessionStats(cameraId, facing, newCameraState, clientName, apiLevel, isNdk, latencyMs)
            {}

        void onOpen();
        void onClose(int32_t latencyMs);
        void onStreamConfigured(int operatingMode, bool internalReconfig, int32_t latencyMs);
        void onActive();
        void onIdle(int64_t requestCount, int64_t resultErrorCount, bool deviceError,
                const std::vector<hardware::CameraStreamStats>& streamStats);
    };

    // Lock for camera session stats map
    static Mutex mLock;
    // Map from camera id to the camera's session statistics
    static std::map<String8, std::shared_ptr<CameraSessionStatsWrapper>> mSessionStatsMap;

    /**
     * Update the session stats of a given camera device (open/close/active/idle) with
     * the camera proxy service in the system service
     */
    static void updateProxyDeviceState(
            const hardware::CameraSessionStats& sessionStats);

    static sp<hardware::ICameraServiceProxy> getCameraServiceProxy();

public:
    // Open
    static void logOpen(const String8& id, int facing,
            const String16& clientPackageName, int apiLevel, bool isNdk,
            int32_t latencyMs);

    // Close
    static void logClose(const String8& id, int32_t latencyMs);

    // Stream configuration
    static void logStreamConfigured(const String8& id, int operatingMode, bool internalReconfig,
            int32_t latencyMs);

    // Session state becomes active
    static void logActive(const String8& id);

    // Session state becomes idle
    static void logIdle(const String8& id,
            int64_t requestCount, int64_t resultErrorCount, bool deviceError,
            const std::vector<hardware::CameraStreamStats>& streamStats);

    // Ping camera service proxy for user update
    static void pingCameraServiceProxy();
};

} // android

#endif // ANDROID_SERVERS_CAMERA_SERVICE_PROXY_WRAPPER_H_