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/*
* Copyright (C) 2015 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_CAMERAFLASHLIGHT_H
#define ANDROID_SERVERS_CAMERA_CAMERAFLASHLIGHT_H
#include <gui/GLConsumer.h>
#include <gui/Surface.h>
#include <utils/KeyedVector.h>
#include <utils/SortedVector.h>
#include "common/CameraProviderManager.h"
#include "common/CameraDeviceBase.h"
#include "device1/CameraHardwareInterface.h"
namespace android {
/**
* FlashControlBase is a base class for flash control. It defines the functions
* that a flash control for each camera module/device version should implement.
*/
class FlashControlBase : public virtual VirtualLightRefBase {
public:
virtual ~FlashControlBase();
// Whether a camera device has a flash unit. Calling this function may
// cause the torch mode to be turned off in HAL v1 devices. If
// previously-on torch mode is turned off,
// callbacks.torch_mode_status_change() should be invoked.
virtual status_t hasFlashUnit(const String8& cameraId,
bool *hasFlash) = 0;
// set the torch mode to on or off.
virtual status_t setTorchMode(const String8& cameraId,
bool enabled) = 0;
};
/**
* CameraFlashlight can be used by camera service to control flashflight.
*/
class CameraFlashlight : public virtual VirtualLightRefBase {
public:
CameraFlashlight(sp<CameraProviderManager> providerManager,
CameraProviderManager::StatusListener* callbacks);
virtual ~CameraFlashlight();
// Find all flash units. This must be called before other methods. All
// camera devices must be closed when it's called because HAL v1 devices
// need to be opened to query available flash modes.
status_t findFlashUnits();
// Whether a camera device has a flash unit. Before findFlashUnits() is
// called, this function always returns false.
bool hasFlashUnit(const String8& cameraId);
// set the torch mode to on or off.
status_t setTorchMode(const String8& cameraId, bool enabled);
// Notify CameraFlashlight that camera service is going to open a camera
// device. CameraFlashlight will free the resources that may cause the
// camera open to fail. Camera service must call this function before
// opening a camera device.
status_t prepareDeviceOpen(const String8& cameraId);
// Notify CameraFlashlight that camera service has closed a camera
// device. CameraFlashlight may invoke callbacks for torch mode
// available depending on the implementation.
status_t deviceClosed(const String8& cameraId);
private:
// create flashlight control based on camera module API and camera
// device API versions.
status_t createFlashlightControl(const String8& cameraId);
// mLock should be locked.
bool hasFlashUnitLocked(const String8& cameraId);
// Check if flash control is in backward compatible mode (simulated torch API by
// opening cameras)
bool isBackwardCompatibleMode(const String8& cameraId);
sp<FlashControlBase> mFlashControl;
sp<CameraProviderManager> mProviderManager;
CameraProviderManager::StatusListener* mCallbacks;
SortedVector<String8> mOpenedCameraIds;
// camera id -> if it has a flash unit
KeyedVector<String8, bool> mHasFlashlightMap;
bool mFlashlightMapInitialized;
Mutex mLock; // protect CameraFlashlight API
};
/**
* Flash control for camera provider v2.4 and above.
*/
class ProviderFlashControl : public FlashControlBase {
public:
ProviderFlashControl(sp<CameraProviderManager> providerManager);
virtual ~ProviderFlashControl();
// FlashControlBase
status_t hasFlashUnit(const String8& cameraId, bool *hasFlash);
status_t setTorchMode(const String8& cameraId, bool enabled);
private:
sp<CameraProviderManager> mProviderManager;
Mutex mLock;
};
/**
* Flash control for camera module <= v2.3 and camera HAL v1
*/
class CameraHardwareInterfaceFlashControl : public FlashControlBase {
public:
CameraHardwareInterfaceFlashControl(
sp<CameraProviderManager> manager,
CameraProviderManager::StatusListener* callbacks);
virtual ~CameraHardwareInterfaceFlashControl();
// FlashControlBase
status_t setTorchMode(const String8& cameraId, bool enabled);
status_t hasFlashUnit(const String8& cameraId, bool *hasFlash);
private:
// connect to a camera device
status_t connectCameraDevice(const String8& cameraId);
// disconnect and free mDevice
status_t disconnectCameraDevice();
// initialize the preview window
status_t initializePreviewWindow(const sp<CameraHardwareInterface>& device,
int32_t width, int32_t height);
// start preview and enable torch
status_t startPreviewAndTorch();
// get the smallest surface
status_t getSmallestSurfaceSize(int32_t *width, int32_t *height);
// protected by mLock
// If this function opens camera device in order to check if it has a flash unit, the
// camera device will remain open if keepDeviceOpen is true and the camera device will be
// closed if keepDeviceOpen is false. If camera device is already open when calling this
// function, keepDeviceOpen is ignored.
status_t hasFlashUnitLocked(const String8& cameraId, bool *hasFlash, bool keepDeviceOpen);
sp<CameraProviderManager> mProviderManager;
CameraProviderManager::StatusListener* mCallbacks;
sp<CameraHardwareInterface> mDevice;
String8 mCameraId;
CameraParameters mParameters;
bool mTorchEnabled;
sp<IGraphicBufferProducer> mProducer;
sp<IGraphicBufferConsumer> mConsumer;
sp<GLConsumer> mSurfaceTexture;
sp<Surface> mSurface;
Mutex mLock;
};
} // namespace android
#endif
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