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191 lines
8.4 KiB
191 lines
8.4 KiB
/*
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* Copyright (C) 2012 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_CAMERACLIENT_H
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#define ANDROID_SERVERS_CAMERA_CAMERACLIENT_H
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#include "CameraService.h"
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namespace android {
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class MemoryHeapBase;
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class CameraHardwareInterface;
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/**
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* Interface between android.hardware.Camera API and Camera HAL device for version
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* CAMERA_DEVICE_API_VERSION_1_0.
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*/
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class CameraClient : public CameraService::Client
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{
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public:
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// ICamera interface (see ICamera for details)
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virtual binder::Status disconnect();
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virtual status_t connect(const sp<hardware::ICameraClient>& client);
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virtual status_t lock();
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virtual status_t unlock();
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virtual status_t setPreviewTarget(const sp<IGraphicBufferProducer>& bufferProducer);
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virtual void setPreviewCallbackFlag(int flag);
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virtual status_t setPreviewCallbackTarget(
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const sp<IGraphicBufferProducer>& callbackProducer);
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virtual status_t startPreview();
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virtual void stopPreview();
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virtual bool previewEnabled();
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virtual status_t setVideoBufferMode(int32_t videoBufferMode);
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virtual status_t startRecording();
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virtual void stopRecording();
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virtual bool recordingEnabled();
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virtual void releaseRecordingFrame(const sp<IMemory>& mem);
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virtual void releaseRecordingFrameHandle(native_handle_t *handle);
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virtual void releaseRecordingFrameHandleBatch(
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const std::vector<native_handle_t*>& handles);
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virtual status_t autoFocus();
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virtual status_t cancelAutoFocus();
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virtual status_t takePicture(int msgType);
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virtual status_t setParameters(const String8& params);
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virtual String8 getParameters() const;
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virtual status_t sendCommand(int32_t cmd, int32_t arg1, int32_t arg2);
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virtual status_t setVideoTarget(const sp<IGraphicBufferProducer>& bufferProducer);
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virtual status_t setAudioRestriction(int mode);
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virtual int32_t getGlobalAudioRestriction();
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virtual status_t setRotateAndCropOverride(uint8_t override);
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// Interface used by CameraService
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CameraClient(const sp<CameraService>& cameraService,
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const sp<hardware::ICameraClient>& cameraClient,
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const String16& clientPackageName,
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const std::unique_ptr<String16>& clientFeatureId,
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int cameraId,
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int cameraFacing,
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int clientPid,
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int clientUid,
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int servicePid);
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~CameraClient();
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virtual status_t initialize(sp<CameraProviderManager> manager,
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const String8& monitorTags) override;
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virtual status_t dump(int fd, const Vector<String16>& args);
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virtual status_t dumpClient(int fd, const Vector<String16>& args);
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private:
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// check whether the calling process matches mClientPid.
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status_t checkPid() const;
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status_t checkPidAndHardware() const; // also check mHardware != 0
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// these are internal functions used to set up preview buffers
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status_t registerPreviewBuffers();
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// camera operation mode
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enum camera_mode {
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CAMERA_PREVIEW_MODE = 0, // frame automatically released
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CAMERA_RECORDING_MODE = 1, // frame has to be explicitly released by releaseRecordingFrame()
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};
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// these are internal functions used for preview/recording
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status_t startCameraMode(camera_mode mode);
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status_t startPreviewMode();
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status_t startRecordingMode();
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// internal function used by sendCommand to enable/disable shutter sound.
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status_t enableShutterSound(bool enable);
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static sp<CameraClient> getClientFromCookie(void* user);
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// these are static callback functions
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static void notifyCallback(int32_t msgType, int32_t ext1, int32_t ext2, void* user);
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static void dataCallback(int32_t msgType, const sp<IMemory>& dataPtr,
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camera_frame_metadata_t *metadata, void* user);
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static void dataCallbackTimestamp(nsecs_t timestamp, int32_t msgType, const sp<IMemory>& dataPtr, void* user);
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static void handleCallbackTimestampBatch(
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int32_t msgType, const std::vector<HandleTimestampMessage>&, void* user);
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// handlers for messages
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void handleShutter(void);
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void handlePreviewData(int32_t msgType, const sp<IMemory>& mem,
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camera_frame_metadata_t *metadata);
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void handlePostview(const sp<IMemory>& mem);
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void handleRawPicture(const sp<IMemory>& mem);
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void handleCompressedPicture(const sp<IMemory>& mem);
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void handleGenericNotify(int32_t msgType, int32_t ext1, int32_t ext2);
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void handleGenericData(int32_t msgType, const sp<IMemory>& dataPtr,
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camera_frame_metadata_t *metadata);
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void handleGenericDataTimestamp(nsecs_t timestamp, int32_t msgType, const sp<IMemory>& dataPtr);
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void copyFrameAndPostCopiedFrame(
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int32_t msgType,
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const sp<hardware::ICameraClient>& client,
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const sp<IMemoryHeap>& heap,
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size_t offset, size_t size,
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camera_frame_metadata_t *metadata);
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int getOrientation(int orientation, bool mirror);
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status_t setPreviewWindow(
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const sp<IBinder>& binder,
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const sp<ANativeWindow>& window);
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// these are initialized in the constructor.
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sp<CameraHardwareInterface> mHardware; // cleared after disconnect()
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int mPreviewCallbackFlag;
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int mOrientation; // Current display orientation
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bool mPlayShutterSound;
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bool mLegacyMode; // camera2 api legacy mode?
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// Ensures atomicity among the public methods
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mutable Mutex mLock;
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// This is a binder of Surface or Surface.
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sp<IBinder> mSurface;
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sp<ANativeWindow> mPreviewWindow;
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// If the user want us to return a copy of the preview frame (instead
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// of the original one), we allocate mPreviewBuffer and reuse it if possible.
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sp<MemoryHeapBase> mPreviewBuffer;
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// Debugging information
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CameraParameters mLatestSetParameters;
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// mAvailableCallbackBuffers stores sp<IMemory> that HAL uses to send VideoNativeHandleMetadata.
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// It will be used to send VideoNativeHandleMetadata back to HAL when camera receives the
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// native handle from releaseRecordingFrameHandle.
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Mutex mAvailableCallbackBuffersLock;
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std::vector<sp<IMemory>> mAvailableCallbackBuffers;
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// We need to avoid the deadlock when the incoming command thread and
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// the CameraHardwareInterface callback thread both want to grab mLock.
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// An extra flag is used to tell the callback thread that it should stop
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// trying to deliver the callback messages if the client is not
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// interested in it anymore. For example, if the client is calling
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// stopPreview(), the preview frame messages do not need to be delivered
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// anymore.
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// This function takes the same parameter as the enableMsgType() and
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// disableMsgType() functions in CameraHardwareInterface.
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void enableMsgType(int32_t msgType);
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void disableMsgType(int32_t msgType);
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volatile int32_t mMsgEnabled;
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// This function keeps trying to grab mLock, or give up if the message
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// is found to be disabled. It returns true if mLock is grabbed.
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bool lockIfMessageWanted(int32_t msgType);
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};
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}
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#endif
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