/*
 * Copyright (C) 2011 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_QEMU_CAMERA_DEVICE_H
#define HW_EMULATOR_CAMERA_EMULATED_QEMU_CAMERA_DEVICE_H

/*
 * Contains declaration of a class EmulatedQemuCameraDevice that encapsulates
 * an emulated camera device connected to the host.
 */

#include "EmulatedCameraDevice.h"
#include "QemuClient.h"

namespace android {

class EmulatedQemuCamera;

/* Encapsulates an emulated camera device connected to the host.
 */
class EmulatedQemuCameraDevice : public EmulatedCameraDevice {
 public:
  /* Constructs EmulatedQemuCameraDevice instance. */
  explicit EmulatedQemuCameraDevice(EmulatedQemuCamera* camera_hal);

  /* Destructs EmulatedQemuCameraDevice instance. */
  ~EmulatedQemuCameraDevice();

  /***************************************************************************
   * Public API
   **************************************************************************/

 public:
  /* Initializes EmulatedQemuCameraDevice instance.
   * Param:
   *  device_name - Name of the camera device connected to the host. The name
   *      that is used here must have been reported by the 'factory' camera
   *      service when it listed camera devices connected to the host.
   * Return:
   *  NO_ERROR on success, or an appropriate error status.
   */
  status_t Initialize(const char* device_name);

  /***************************************************************************
   * Emulated camera device abstract interface implementation.
   * See declarations of these methods in EmulatedCameraDevice class for
   * information on each of these methods.
   **************************************************************************/

 public:
  /* Connects to the camera device. */
  status_t connectDevice();

  /* Disconnects from the camera device. */
  status_t disconnectDevice();

  /* Starts capturing frames from the camera device. */
  status_t startDevice(int width, int height, uint32_t pix_fmt, int fps);

  /* Stops capturing frames from the camera device. */
  status_t stopDevice();

  /***************************************************************************
   * EmulatedCameraDevice virtual overrides
   * See declarations of these methods in EmulatedCameraDevice class for
   * information on each of these methods.
   **************************************************************************/

 public:
  /* Gets current preview fame into provided buffer.
   * We override this method in order to provide preview frames cached in this
   * object.
   */
  status_t getCurrentPreviewFrame(void* buffer);

  /***************************************************************************
   * Worker thread management overrides.
   * See declarations of these methods in EmulatedCameraDevice class for
   * information on each of these methods.
   **************************************************************************/

 protected:
  /* Implementation of the worker thread routine. */
  bool inWorkerThread();

  /***************************************************************************
   * Qemu camera device data members
   **************************************************************************/

 private:
  /* Qemu client that is used to communicate with the 'emulated camera'
   * service, created for this instance in the emulator. */
  CameraQemuClient mQemuClient;

  /* Name of the camera device connected to the host. */
  String8 mDeviceName;

  /* Current preview framebuffer. */
  uint32_t* mPreviewFrame;

  /* Emulated FPS (frames per second).
   * We will emulate 50 FPS. */
  static const int mEmulatedFPS = 50;
};

}; /* namespace android */

#endif /* HW_EMULATOR_CAMERA_EMULATED_QEMU_CAMERA_DEVICE_H */