--- /dev/null
+/*
+ * Copyright (C) 2013 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 HW_EMULATOR_CAMERA_EMULATED_FAKE_CAMERA3_H
+#define HW_EMULATOR_CAMERA_EMULATED_FAKE_CAMERA3_H
+
+/**
+ * Contains declaration of a class EmulatedCamera that encapsulates
+ * functionality of a fake camera that implements version 3 of the camera device
+ * interace.
+ */
+
+#include "EmulatedCamera3.h"
+#include "fake-pipeline2/Base.h"
+#include "fake-pipeline2/Sensor.h"
+#include "fake-pipeline2/JpegCompressor.h"
+#include <camera/CameraMetadata.h>
+#include <utils/SortedVector.h>
+#include <utils/List.h>
+#include <utils/Mutex.h>
+
+namespace android {
+
+/**
+ * Encapsulates functionality for a v3 HAL camera which produces synthetic data.
+ *
+ * Note that EmulatedCameraFactory instantiates an object of this class just
+ * once, when EmulatedCameraFactory instance gets constructed. Connection to /
+ * disconnection from the actual camera device is handled by calls to
+ * connectDevice(), and closeCamera() methods of this class that are invoked in
+ * response to hw_module_methods_t::open, and camera_device::close callbacks.
+ */
+class EmulatedFakeCamera3 : public EmulatedCamera3,
+ private Sensor::SensorListener {
+public:
+
+ EmulatedFakeCamera3(int cameraId, bool facingBack,
+ struct hw_module_t* module);
+
+ virtual ~EmulatedFakeCamera3();
+
+ /****************************************************************************
+ * EmulatedCamera3 virtual overrides
+ ***************************************************************************/
+
+public:
+
+ virtual status_t Initialize();
+
+ /****************************************************************************
+ * Camera module API and generic hardware device API implementation
+ ***************************************************************************/
+
+public:
+ virtual status_t connectCamera(hw_device_t** device);
+
+ virtual status_t closeCamera();
+
+ virtual status_t getCameraInfo(struct camera_info *info);
+
+ /****************************************************************************
+ * EmulatedCamera3 abstract API implementation
+ ***************************************************************************/
+
+protected:
+
+ virtual status_t configureStreams(
+ camera3_stream_configuration *streamList);
+
+ virtual status_t registerStreamBuffers(
+ const camera3_stream_buffer_set *bufferSet) ;
+
+ virtual const camera_metadata_t* constructDefaultRequestSettings(
+ int type);
+
+ virtual status_t processCaptureRequest(camera3_capture_request *request);
+
+ virtual status_t flush();
+
+ /** Debug methods */
+
+ virtual void dump(int fd);
+
+private:
+
+ /**
+ * Get the requested capability set for this camera
+ */
+ status_t getCameraCapabilities();
+
+ bool hasCapability(AvailableCapabilities cap);
+
+ /**
+ * Build the static info metadata buffer for this device
+ */
+ status_t constructStaticInfo();
+
+ /**
+ * Run the fake 3A algorithms as needed. May override/modify settings
+ * values.
+ */
+ status_t process3A(CameraMetadata &settings);
+
+ status_t doFakeAE(CameraMetadata &settings);
+ status_t doFakeAF(CameraMetadata &settings);
+ status_t doFakeAWB(CameraMetadata &settings);
+ void update3A(CameraMetadata &settings);
+
+ /** Signal from readout thread that it doesn't have anything to do */
+ void signalReadoutIdle();
+
+ /** Handle interrupt events from the sensor */
+ void onSensorEvent(uint32_t frameNumber, Event e, nsecs_t timestamp);
+
+ /****************************************************************************
+ * Static configuration information
+ ***************************************************************************/
+private:
+ static const uint32_t kMaxRawStreamCount = 1;
+ static const uint32_t kMaxProcessedStreamCount = 3;
+ static const uint32_t kMaxJpegStreamCount = 1;
+ static const uint32_t kMaxReprocessStreamCount = 2;
+ static const uint32_t kMaxBufferCount = 4;
+ // We need a positive stream ID to distinguish external buffers from
+ // sensor-generated buffers which use a nonpositive ID. Otherwise, HAL3 has
+ // no concept of a stream id.
+ static const uint32_t kGenericStreamId = 1;
+ static const int32_t kAvailableFormats[];
+
+ static const int64_t kSyncWaitTimeout = 10000000; // 10 ms
+ static const int32_t kMaxSyncTimeoutCount = 1000; // 1000 kSyncWaitTimeouts
+ static const uint32_t kFenceTimeoutMs = 2000; // 2 s
+
+ /****************************************************************************
+ * Data members.
+ ***************************************************************************/
+
+ /* HAL interface serialization lock. */
+ Mutex mLock;
+
+ /* Facing back (true) or front (false) switch. */
+ bool mFacingBack;
+
+ SortedVector<AvailableCapabilities> mCapabilities;
+
+ /**
+ * Cache for default templates. Once one is requested, the pointer must be
+ * valid at least until close() is called on the device
+ */
+ camera_metadata_t *mDefaultTemplates[CAMERA3_TEMPLATE_COUNT];
+
+ /**
+ * Private stream information, stored in camera3_stream_t->priv.
+ */
+ struct PrivateStreamInfo {
+ bool alive;
+ };
+
+ // Shortcut to the input stream
+ camera3_stream_t* mInputStream;
+
+ typedef List<camera3_stream_t*> StreamList;
+ typedef List<camera3_stream_t*>::iterator StreamIterator;
+ typedef Vector<camera3_stream_buffer> HalBufferVector;
+
+ // All streams, including input stream
+ StreamList mStreams;
+
+ // Cached settings from latest submitted request
+ CameraMetadata mPrevSettings;
+
+ /** Fake hardware interfaces */
+ sp<Sensor> mSensor;
+ sp<JpegCompressor> mJpegCompressor;
+ friend class JpegCompressor;
+
+ /** Processing thread for sending out results */
+
+ class ReadoutThread : public Thread, private JpegCompressor::JpegListener {
+ public:
+ ReadoutThread(EmulatedFakeCamera3 *parent);
+ ~ReadoutThread();
+
+ struct Request {
+ uint32_t frameNumber;
+ CameraMetadata settings;
+ HalBufferVector *buffers;
+ Buffers *sensorBuffers;
+ };
+
+ /**
+ * Interface to parent class
+ */
+
+ // Place request in the in-flight queue to wait for sensor capture
+ void queueCaptureRequest(const Request &r);
+
+ // Test if the readout thread is idle (no in-flight requests, not
+ // currently reading out anything
+ bool isIdle();
+
+ // Wait until isIdle is true
+ status_t waitForReadout();
+
+ private:
+ static const nsecs_t kWaitPerLoop = 10000000L; // 10 ms
+ static const nsecs_t kMaxWaitLoops = 1000;
+ static const size_t kMaxQueueSize = 2;
+
+ EmulatedFakeCamera3 *mParent;
+ Mutex mLock;
+
+ List<Request> mInFlightQueue;
+ Condition mInFlightSignal;
+ bool mThreadActive;
+
+ virtual bool threadLoop();
+
+ // Only accessed by threadLoop
+
+ Request mCurrentRequest;
+
+ // Jpeg completion callbacks
+
+ Mutex mJpegLock;
+ bool mJpegWaiting;
+ camera3_stream_buffer mJpegHalBuffer;
+ uint32_t mJpegFrameNumber;
+ virtual void onJpegDone(const StreamBuffer &jpegBuffer, bool success);
+ virtual void onJpegInputDone(const StreamBuffer &inputBuffer);
+ };
+
+ sp<ReadoutThread> mReadoutThread;
+
+ /** Fake 3A constants */
+
+ static const nsecs_t kNormalExposureTime;
+ static const nsecs_t kFacePriorityExposureTime;
+ static const int kNormalSensitivity;
+ static const int kFacePrioritySensitivity;
+ // Rate of converging AE to new target value, as fraction of difference between
+ // current and target value.
+ static const float kExposureTrackRate;
+ // Minimum duration for precapture state. May be longer if slow to converge
+ // to target exposure
+ static const int kPrecaptureMinFrames;
+ // How often to restart AE 'scanning'
+ static const int kStableAeMaxFrames;
+ // Maximum stop below 'normal' exposure time that we'll wander to while
+ // pretending to converge AE. In powers of 2. (-2 == 1/4 as bright)
+ static const float kExposureWanderMin;
+ // Maximum stop above 'normal' exposure time that we'll wander to while
+ // pretending to converge AE. In powers of 2. (2 == 4x as bright)
+ static const float kExposureWanderMax;
+
+ /** Fake 3A state */
+
+ uint8_t mControlMode;
+ bool mFacePriority;
+ uint8_t mAeState;
+ uint8_t mAfState;
+ uint8_t mAwbState;
+ uint8_t mAeMode;
+ uint8_t mAfMode;
+ uint8_t mAwbMode;
+
+ int mAeCounter;
+ nsecs_t mAeCurrentExposureTime;
+ nsecs_t mAeTargetExposureTime;
+ int mAeCurrentSensitivity;
+
+};
+
+} // namespace android
+
+#endif // HW_EMULATOR_CAMERA_EMULATED_CAMERA3_H
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