| /* |
| * Copyright (C) 2012 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_CAMERACLIENT_H |
| #define ANDROID_SERVERS_CAMERA_CAMERACLIENT_H |
| |
| #include "CameraService.h" |
| |
| namespace android { |
| |
| class MemoryHeapBase; |
| class CameraHardwareInterface; |
| |
| /** |
| * Interface between android.hardware.Camera API and Camera HAL device for version |
| * CAMERA_DEVICE_API_VERSION_1_0. |
| */ |
| |
| class CameraClient : public CameraService::Client |
| { |
| public: |
| // ICamera interface (see ICamera for details) |
| virtual binder::Status disconnect(); |
| virtual status_t connect(const sp<hardware::ICameraClient>& client); |
| virtual status_t lock(); |
| virtual status_t unlock(); |
| virtual status_t setPreviewTarget(const sp<IGraphicBufferProducer>& bufferProducer); |
| virtual void setPreviewCallbackFlag(int flag); |
| virtual status_t setPreviewCallbackTarget( |
| const sp<IGraphicBufferProducer>& callbackProducer); |
| virtual status_t startPreview(); |
| virtual void stopPreview(); |
| virtual bool previewEnabled(); |
| virtual status_t setVideoBufferMode(int32_t videoBufferMode); |
| virtual status_t startRecording(); |
| virtual void stopRecording(); |
| virtual bool recordingEnabled(); |
| virtual void releaseRecordingFrame(const sp<IMemory>& mem); |
| virtual void releaseRecordingFrameHandle(native_handle_t *handle); |
| virtual void releaseRecordingFrameHandleBatch( |
| const std::vector<native_handle_t*>& handles); |
| virtual status_t autoFocus(); |
| virtual status_t cancelAutoFocus(); |
| virtual status_t takePicture(int msgType); |
| virtual status_t setParameters(const String8& params); |
| virtual String8 getParameters() const; |
| virtual status_t sendCommand(int32_t cmd, int32_t arg1, int32_t arg2); |
| virtual status_t setVideoTarget(const sp<IGraphicBufferProducer>& bufferProducer); |
| |
| // Interface used by CameraService |
| CameraClient(const sp<CameraService>& cameraService, |
| const sp<hardware::ICameraClient>& cameraClient, |
| const String16& clientPackageName, |
| int cameraId, |
| int cameraFacing, |
| int clientPid, |
| int clientUid, |
| int servicePid); |
| ~CameraClient(); |
| |
| virtual status_t initialize(sp<CameraProviderManager> manager, |
| const String8& monitorTags) override; |
| |
| virtual status_t dump(int fd, const Vector<String16>& args); |
| |
| virtual status_t dumpClient(int fd, const Vector<String16>& args); |
| |
| private: |
| |
| // check whether the calling process matches mClientPid. |
| status_t checkPid() const; |
| status_t checkPidAndHardware() const; // also check mHardware != 0 |
| |
| // these are internal functions used to set up preview buffers |
| status_t registerPreviewBuffers(); |
| |
| // camera operation mode |
| enum camera_mode { |
| CAMERA_PREVIEW_MODE = 0, // frame automatically released |
| CAMERA_RECORDING_MODE = 1, // frame has to be explicitly released by releaseRecordingFrame() |
| }; |
| // these are internal functions used for preview/recording |
| status_t startCameraMode(camera_mode mode); |
| status_t startPreviewMode(); |
| status_t startRecordingMode(); |
| |
| // internal function used by sendCommand to enable/disable shutter sound. |
| status_t enableShutterSound(bool enable); |
| |
| static sp<CameraClient> getClientFromCookie(void* user); |
| |
| // these are static callback functions |
| static void notifyCallback(int32_t msgType, int32_t ext1, int32_t ext2, void* user); |
| static void dataCallback(int32_t msgType, const sp<IMemory>& dataPtr, |
| camera_frame_metadata_t *metadata, void* user); |
| static void dataCallbackTimestamp(nsecs_t timestamp, int32_t msgType, const sp<IMemory>& dataPtr, void* user); |
| static void handleCallbackTimestampBatch( |
| int32_t msgType, const std::vector<HandleTimestampMessage>&, void* user); |
| // handlers for messages |
| void handleShutter(void); |
| void handlePreviewData(int32_t msgType, const sp<IMemory>& mem, |
| camera_frame_metadata_t *metadata); |
| void handlePostview(const sp<IMemory>& mem); |
| void handleRawPicture(const sp<IMemory>& mem); |
| void handleCompressedPicture(const sp<IMemory>& mem); |
| void handleGenericNotify(int32_t msgType, int32_t ext1, int32_t ext2); |
| void handleGenericData(int32_t msgType, const sp<IMemory>& dataPtr, |
| camera_frame_metadata_t *metadata); |
| void handleGenericDataTimestamp(nsecs_t timestamp, int32_t msgType, const sp<IMemory>& dataPtr); |
| |
| void copyFrameAndPostCopiedFrame( |
| int32_t msgType, |
| const sp<hardware::ICameraClient>& client, |
| const sp<IMemoryHeap>& heap, |
| size_t offset, size_t size, |
| camera_frame_metadata_t *metadata); |
| |
| int getOrientation(int orientation, bool mirror); |
| |
| status_t setPreviewWindow( |
| const sp<IBinder>& binder, |
| const sp<ANativeWindow>& window); |
| |
| |
| // these are initialized in the constructor. |
| sp<CameraHardwareInterface> mHardware; // cleared after disconnect() |
| int mPreviewCallbackFlag; |
| int mOrientation; // Current display orientation |
| bool mPlayShutterSound; |
| bool mLegacyMode; // camera2 api legacy mode? |
| |
| // Ensures atomicity among the public methods |
| mutable Mutex mLock; |
| // This is a binder of Surface or Surface. |
| sp<IBinder> mSurface; |
| sp<ANativeWindow> mPreviewWindow; |
| |
| // If the user want us to return a copy of the preview frame (instead |
| // of the original one), we allocate mPreviewBuffer and reuse it if possible. |
| sp<MemoryHeapBase> mPreviewBuffer; |
| |
| // Debugging information |
| CameraParameters mLatestSetParameters; |
| |
| // mAvailableCallbackBuffers stores sp<IMemory> that HAL uses to send VideoNativeHandleMetadata. |
| // It will be used to send VideoNativeHandleMetadata back to HAL when camera receives the |
| // native handle from releaseRecordingFrameHandle. |
| Mutex mAvailableCallbackBuffersLock; |
| std::vector<sp<IMemory>> mAvailableCallbackBuffers; |
| |
| // We need to avoid the deadlock when the incoming command thread and |
| // the CameraHardwareInterface callback thread both want to grab mLock. |
| // An extra flag is used to tell the callback thread that it should stop |
| // trying to deliver the callback messages if the client is not |
| // interested in it anymore. For example, if the client is calling |
| // stopPreview(), the preview frame messages do not need to be delivered |
| // anymore. |
| |
| // This function takes the same parameter as the enableMsgType() and |
| // disableMsgType() functions in CameraHardwareInterface. |
| void enableMsgType(int32_t msgType); |
| void disableMsgType(int32_t msgType); |
| volatile int32_t mMsgEnabled; |
| |
| // This function keeps trying to grab mLock, or give up if the message |
| // is found to be disabled. It returns true if mLock is grabbed. |
| bool lockIfMessageWanted(int32_t msgType); |
| }; |
| |
| } |
| |
| #endif |
