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128 lines
4.5 KiB
128 lines
4.5 KiB
/*
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* Copyright (C) 2015 The Android Open Source Project
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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 ANDROID_SERVERS_CAMERA_CAMERAFLASHLIGHT_H
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#define ANDROID_SERVERS_CAMERA_CAMERAFLASHLIGHT_H
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#include <gui/GLConsumer.h>
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#include <gui/Surface.h>
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#include <utils/KeyedVector.h>
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#include <utils/SortedVector.h>
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#include "common/CameraProviderManager.h"
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#include "common/CameraDeviceBase.h"
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namespace android {
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/**
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* FlashControlBase is a base class for flash control. It defines the functions
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* that a flash control for each camera module/device version should implement.
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*/
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class FlashControlBase : public virtual VirtualLightRefBase {
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public:
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virtual ~FlashControlBase();
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// Whether a camera device has a flash unit. Calling this function may
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// cause the torch mode to be turned off in HAL v1 devices. If
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// previously-on torch mode is turned off,
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// callbacks.torch_mode_status_change() should be invoked.
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virtual status_t hasFlashUnit(const String8& cameraId,
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bool *hasFlash) = 0;
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// set the torch mode to on or off.
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virtual status_t setTorchMode(const String8& cameraId,
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bool enabled) = 0;
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};
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/**
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* CameraFlashlight can be used by camera service to control flashflight.
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*/
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class CameraFlashlight : public virtual VirtualLightRefBase {
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public:
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CameraFlashlight(sp<CameraProviderManager> providerManager,
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CameraProviderManager::StatusListener* callbacks);
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virtual ~CameraFlashlight();
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// Find all flash units. This must be called before other methods. All
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// camera devices must be closed when it's called because HAL v1 devices
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// need to be opened to query available flash modes.
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status_t findFlashUnits();
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// Whether a camera device has a flash unit. Before findFlashUnits() is
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// called, this function always returns false.
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bool hasFlashUnit(const String8& cameraId);
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// set the torch mode to on or off.
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status_t setTorchMode(const String8& cameraId, bool enabled);
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// Notify CameraFlashlight that camera service is going to open a camera
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// device. CameraFlashlight will free the resources that may cause the
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// camera open to fail. Camera service must call this function before
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// opening a camera device.
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status_t prepareDeviceOpen(const String8& cameraId);
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// Notify CameraFlashlight that camera service has closed a camera
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// device. CameraFlashlight may invoke callbacks for torch mode
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// available depending on the implementation.
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status_t deviceClosed(const String8& cameraId);
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private:
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// create flashlight control based on camera module API and camera
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// device API versions.
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status_t createFlashlightControl(const String8& cameraId);
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// mLock should be locked.
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bool hasFlashUnitLocked(const String8& cameraId);
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// Check if flash control is in backward compatible mode (simulated torch API by
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// opening cameras)
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bool isBackwardCompatibleMode(const String8& cameraId);
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sp<FlashControlBase> mFlashControl;
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sp<CameraProviderManager> mProviderManager;
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CameraProviderManager::StatusListener* mCallbacks;
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SortedVector<String8> mOpenedCameraIds;
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// camera id -> if it has a flash unit
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KeyedVector<String8, bool> mHasFlashlightMap;
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bool mFlashlightMapInitialized;
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Mutex mLock; // protect CameraFlashlight API
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};
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/**
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* Flash control for camera provider v2.4 and above.
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*/
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class ProviderFlashControl : public FlashControlBase {
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public:
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ProviderFlashControl(sp<CameraProviderManager> providerManager);
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virtual ~ProviderFlashControl();
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// FlashControlBase
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status_t hasFlashUnit(const String8& cameraId, bool *hasFlash);
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status_t setTorchMode(const String8& cameraId, bool enabled);
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private:
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sp<CameraProviderManager> mProviderManager;
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Mutex mLock;
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};
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} // namespace android
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#endif
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