gecko-dev/dom/camera/GonkCameraHwMgr.h

/*
 * Copyright (C) 2012-2014 Mozilla Foundation
 *
 * 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 DOM_CAMERA_GONKCAMERAHWMGR_H
#define DOM_CAMERA_GONKCAMERAHWMGR_H

#include "GonkCameraControl.h"
#include "CameraCommon.h"
#include "GonkCameraParameters.h"
#include "mozilla/ReentrantMonitor.h"

#ifdef MOZ_WIDGET_GONK
#include <binder/IMemory.h>
#include <camera/Camera.h>
#include <camera/CameraParameters.h>
#include <utils/threads.h>
#include "GonkCameraListener.h"
#include "GonkNativeWindow.h"
#else
#include "FallbackCameraPlatform.h"
#endif

namespace mozilla {
  class nsGonkCameraControl;
  class GonkCameraParameters;
}

namespace android {

class GonkCameraHardware
#ifdef MOZ_WIDGET_GONK
  : public GonkNativeWindowNewFrameCallback
  , public CameraListener
#else
  : public nsISupports
#endif
{
#ifndef MOZ_WIDGET_GONK
  NS_DECL_ISUPPORTS
#endif

protected:
  GonkCameraHardware(mozilla::nsGonkCameraControl* aTarget, uint32_t aCameraId, const sp<Camera>& aCamera);
  virtual ~GonkCameraHardware();

  // Initialize the AOSP camera interface.
  //
  // Return values:
  //  - NS_OK on success;
  //  - NS_ERROR_NOT_INITIALIZED if the interface could not be initialized.
  virtual nsresult Init();

public:
  static sp<GonkCameraHardware> Connect(mozilla::nsGonkCameraControl* aTarget, uint32_t aCameraId);
  virtual void Close();

  virtual void OnRateLimitPreview(bool aLimit);

#ifdef MOZ_WIDGET_GONK
  // derived from GonkNativeWindowNewFrameCallback
  virtual void OnNewFrame() override;

  // derived from CameraListener
  virtual void notify(int32_t aMsgType, int32_t ext1, int32_t ext2);
  virtual void postData(int32_t aMsgType, const sp<IMemory>& aDataPtr, camera_frame_metadata_t* metadata);
  virtual void postDataTimestamp(nsecs_t aTimestamp, int32_t aMsgType, const sp<IMemory>& aDataPtr);
#endif

  /**
   * The physical orientation of the camera sensor: 0, 90, 180, or 270.
   *
   * For example, suppose a device has a naturally tall screen. The
   * back-facing camera sensor is mounted in landscape. You are looking at
   * the screen. If the top side of the camera sensor is aligned with the
   * right edge of the screen in natural orientation, the value should be
   * 90. If the top side of a front-facing camera sensor is aligned with the
   * right of the screen, the value should be 270.
   *
   * RAW_SENSOR_ORIENTATION is the uncorrected orientation returned directly
   * by get_camera_info(); OFFSET_SENSOR_ORIENTATION is the offset adjusted
   * orientation.
   */
  enum {
    RAW_SENSOR_ORIENTATION,
    OFFSET_SENSOR_ORIENTATION
  };
  virtual int      GetSensorOrientation(uint32_t aType = RAW_SENSOR_ORIENTATION);

  virtual bool     IsEmulated();

  /**
   * MIN_UNDEQUEUED_BUFFERS has increased to 4 since Android JB. For FFOS, more
   * than 3 gralloc buffers are necessary between ImageHost and GonkBufferQueue
   * for consuming preview stream. To keep the stability for older platform, we
   * set MIN_UNDEQUEUED_BUFFERS to 4 only in Android KK base.
   * See also bug 988704.
   */
  enum { MIN_UNDEQUEUED_BUFFERS = 4};

  virtual int      AutoFocus();
  virtual int      CancelAutoFocus();
  virtual int      StartFaceDetection();
  virtual int      StopFaceDetection();
  virtual int      TakePicture();
  virtual void     CancelTakePicture();
  virtual int      StartPreview();
  virtual void     StopPreview();
  virtual int      PushParameters(const mozilla::GonkCameraParameters& aParams);
  virtual nsresult PullParameters(mozilla::GonkCameraParameters& aParams);
#ifdef MOZ_WIDGET_GONK
  virtual int      PushParameters(const CameraParameters& aParams);
  virtual void     PullParameters(CameraParameters& aParams);
  virtual int      SetListener(const sp<GonkCameraListener>& aListener);
  virtual void     ReleaseRecordingFrame(const sp<IMemory>& aFrame);
#endif
  virtual int      StartRecording();
  virtual int      StopRecording();
  virtual int      StoreMetaDataInBuffers(bool aEnabled);

protected:
  uint32_t                      mCameraId;
  bool                          mClosing;
  uint32_t                      mNumFrames;
  sp<Camera>                    mCamera;
  mozilla::nsGonkCameraControl* mTarget;
#ifdef MOZ_WIDGET_GONK
  sp<GonkNativeWindow>          mNativeWindow;
  sp<GonkCameraListener>        mListener;
#endif
  int                           mRawSensorOrientation;
  int                           mSensorOrientation;
  bool                          mEmulated;

private:
  GonkCameraHardware(const GonkCameraHardware&) = delete;
  GonkCameraHardware& operator=(const GonkCameraHardware&) = delete;
};

} // namespace android

#endif // GONK_IMPL_HW_MGR_H