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Diffstat (limited to 'services/camera/libcameraservice/CameraFlashlight.h')
| -rw-r--r-- | services/camera/libcameraservice/CameraFlashlight.h | 225 |
1 files changed, 225 insertions, 0 deletions
diff --git a/services/camera/libcameraservice/CameraFlashlight.h b/services/camera/libcameraservice/CameraFlashlight.h new file mode 100644 index 0000000..30f01f0 --- /dev/null +++ b/services/camera/libcameraservice/CameraFlashlight.h @@ -0,0 +1,225 @@ +/* + * 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 "hardware/camera_common.h" +#include "utils/KeyedVector.h" +#include "utils/SortedVector.h" +#include "gui/GLConsumer.h" +#include "gui/Surface.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(CameraModule& cameraModule, + const camera_module_callbacks_t& 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); + + sp<FlashControlBase> mFlashControl; + CameraModule *mCameraModule; + const camera_module_callbacks_t *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 module v2.4 and above. + */ +class ModuleFlashControl : public FlashControlBase { + public: + ModuleFlashControl(CameraModule& cameraModule, + const camera_module_callbacks_t& callbacks); + virtual ~ModuleFlashControl(); + + // FlashControlBase + status_t hasFlashUnit(const String8& cameraId, bool *hasFlash); + status_t setTorchMode(const String8& cameraId, bool enabled); + + private: + CameraModule *mCameraModule; + + Mutex mLock; +}; + +/** + * Flash control for camera module <= v2.3 and camera HAL v2-v3 + */ +class CameraDeviceClientFlashControl : public FlashControlBase { + public: + CameraDeviceClientFlashControl(CameraModule& cameraModule, + const camera_module_callbacks_t& callbacks); + virtual ~CameraDeviceClientFlashControl(); + + // 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 a surface + status_t initializeSurface(sp<CameraDeviceBase>& device, int32_t width, + int32_t height); + + // submit a request to enable the torch mode + status_t submitTorchEnabledRequest(); + + // get the smallest surface size of IMPLEMENTATION_DEFINED + status_t getSmallestSurfaceSize(const camera_info& info, int32_t *width, + int32_t *height); + + // protected by mLock + status_t hasFlashUnitLocked(const String8& cameraId, bool *hasFlash); + + CameraModule *mCameraModule; + const camera_module_callbacks_t *mCallbacks; + String8 mCameraId; + bool mTorchEnabled; + CameraMetadata *mMetadata; + // WORKAROUND: will be set to true for HAL v2 devices where + // setStreamingRequest() needs to be call for torch mode settings to + // take effect. + bool mStreaming; + + sp<CameraDeviceBase> mDevice; + + sp<IGraphicBufferProducer> mProducer; + sp<IGraphicBufferConsumer> mConsumer; + sp<GLConsumer> mSurfaceTexture; + sp<ANativeWindow> mAnw; + int32_t mStreamId; + + Mutex mLock; +}; + +/** + * Flash control for camera module <= v2.3 and camera HAL v1 + */ +class CameraHardwareInterfaceFlashControl : public FlashControlBase { + public: + CameraHardwareInterfaceFlashControl(CameraModule& cameraModule, + const camera_module_callbacks_t& 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(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 + status_t hasFlashUnitLocked(const String8& cameraId, bool *hasFlash); + + CameraModule *mCameraModule; + const camera_module_callbacks_t *mCallbacks; + sp<CameraHardwareInterface> mDevice; + String8 mCameraId; + CameraParameters mParameters; + bool mTorchEnabled; + + sp<IGraphicBufferProducer> mProducer; + sp<IGraphicBufferConsumer> mConsumer; + sp<GLConsumer> mSurfaceTexture; + sp<ANativeWindow> mAnw; + + Mutex mLock; +}; + +} // namespace android + +#endif |