/*
 * Copyright (C) 2012 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.
 */

#include <binder/IPCThreadState.h>
#include <sys/system_properties.h>

#include "base/basictypes.h"
#include "nsDebug.h"
#include "GonkCameraControl.h"
#include "GonkCameraHwMgr.h"
#include "GonkNativeWindow.h"
#include "CameraCommon.h"

using namespace mozilla;
using namespace mozilla::layers;
using namespace android;

#if GIHM_TIMING_RECEIVEFRAME
#define INCLUDE_TIME_H                  1
#endif
#if GIHM_TIMING_OVERALL
#define INCLUDE_TIME_H                  1
#endif

#if INCLUDE_TIME_H
#include <time.h>

static __inline void timespecSubtract(struct timespec* a, struct timespec* b)
{
  // a = b - a
  if (b->tv_nsec < a->tv_nsec) {
    b->tv_nsec += 1000000000;
    b->tv_sec -= 1;
  }
  a->tv_nsec = b->tv_nsec - a->tv_nsec;
  a->tv_sec = b->tv_sec - a->tv_sec;
}
#endif

GonkCameraHardware::GonkCameraHardware(mozilla::nsGonkCameraControl* aTarget, uint32_t aCameraId, const sp<Camera>& aCamera)
  : mCameraId(aCameraId)
  , mClosing(false)
  , mMonitor("GonkCameraHardware.Monitor")
  , mNumFrames(0)
  , mCamera(aCamera)
  , mTarget(aTarget)
  , mInitialized(false)
  , mSensorOrientation(0)
{
  DOM_CAMERA_LOGT( "%s:%d : this=%p (aTarget=%p)\n", __func__, __LINE__, (void*)this, (void*)aTarget );
  Init();
}

void
GonkCameraHardware::OnNewFrame()
{
  if (mClosing) {
    return;
  }
  nsRefPtr<GraphicBufferLocked> buffer = mNativeWindow->getCurrentBuffer();
  if (!buffer) {
    DOM_CAMERA_LOGW("received null frame");
    return;
  }
  ReceiveFrame(mTarget, buffer);
}

// Android data callback
void
GonkCameraHardware::postData(int32_t aMsgType, const sp<IMemory>& aDataPtr, camera_frame_metadata_t* metadata)
{
  if (mClosing) {
    return;
  }

  switch (aMsgType) {
    case CAMERA_MSG_PREVIEW_FRAME:
      // Do nothing
      break;

    case CAMERA_MSG_COMPRESSED_IMAGE:
      if (aDataPtr != nullptr) {
        ReceiveImage(mTarget, (uint8_t*)aDataPtr->pointer(), aDataPtr->size());
      } else {
        ReceiveImageError(mTarget);
      }
      break;

    default:
      DOM_CAMERA_LOGE("Unhandled data callback event %d\n", aMsgType);
      break;
  }
}

// Android notify callback
void
GonkCameraHardware::notify(int32_t aMsgType, int32_t ext1, int32_t ext2)
{
  bool bSuccess;
  if (mClosing) {
    return;
  }

  switch (aMsgType) {
    case CAMERA_MSG_FOCUS:
      if (ext1) {
        DOM_CAMERA_LOGI("Autofocus complete");
        bSuccess = true;
      } else {
        DOM_CAMERA_LOGW("Autofocus failed");
        bSuccess = false;
      }
      AutoFocusComplete(mTarget, bSuccess);
      break;

    case CAMERA_MSG_SHUTTER:
      OnShutter(mTarget);
      break;

    default:
      DOM_CAMERA_LOGE("Unhandled notify callback event %d\n", aMsgType);
      break;
  }
}

void
GonkCameraHardware::postDataTimestamp(nsecs_t aTimestamp, int32_t aMsgType, const sp<IMemory>& aDataPtr)
{
  DOM_CAMERA_LOGI("%s",__func__);
  if (mClosing) {
    return;
  }

  if (mListener.get()) {
    DOM_CAMERA_LOGI("Listener registered, posting recording frame!");
    mListener->postDataTimestamp(aTimestamp, aMsgType, aDataPtr);
  } else {
    DOM_CAMERA_LOGW("No listener was set. Drop a recording frame.");
    mCamera->releaseRecordingFrame(aDataPtr);
  }
}

void
GonkCameraHardware::Init()
{
  DOM_CAMERA_LOGT("%s: this=%p\n", __func__, (void* )this);

  CameraInfo info;
  int rv = Camera::getCameraInfo(mCameraId, &info);
  if (rv != 0) {
    DOM_CAMERA_LOGE("%s: failed to get CameraInfo mCameraId %d\n", __func__, mCameraId);
    return;
   }

  mRawSensorOrientation = info.orientation;
  mSensorOrientation = mRawSensorOrientation;

  /**
   * Non-V4L2-based camera driver adds extra offset onto picture orientation
   * set by gecko, so we have to adjust it back.
   */
  char propname[PROP_NAME_MAX];
  char prop[PROP_VALUE_MAX];
  int offset = 0;
  snprintf(propname, sizeof(propname), "ro.moz.cam.%d.sensor_offset", mCameraId);
  if (__system_property_get(propname, prop) > 0) {
    offset = clamped(atoi(prop), 0, 270);
    mSensorOrientation += offset;
    mSensorOrientation %= 360;
  }
  DOM_CAMERA_LOGI("Sensor orientation: base=%d, offset=%d, final=%d\n", info.orientation, offset, mSensorOrientation);

  // Disable shutter sound in android CameraService because gaia camera app will play it
  mCamera->sendCommand(CAMERA_CMD_ENABLE_SHUTTER_SOUND, 0, 0);

  mNativeWindow = new GonkNativeWindow();
  mNativeWindow->setNewFrameCallback(this);
  mCamera->setListener(this);
#if defined(MOZ_WIDGET_GONK) && ANDROID_VERSION >= 17
  mCamera->setPreviewTexture(mNativeWindow->getBufferQueue());
#else
  mCamera->setPreviewTexture(mNativeWindow);
#endif
  mInitialized = true;
}

sp<GonkCameraHardware>
GonkCameraHardware::Connect(mozilla::nsGonkCameraControl* aTarget, uint32_t aCameraId)
{
#if defined(MOZ_WIDGET_GONK) && ANDROID_VERSION >= 18
  sp<Camera> camera = Camera::connect(aCameraId, /* clientPackageName */String16("gonk.camera"), Camera::USE_CALLING_UID);
#else
  sp<Camera> camera = Camera::connect(aCameraId);
#endif


  if (camera.get() == nullptr) {
    return nullptr;
  }
  sp<GonkCameraHardware> cameraHardware = new GonkCameraHardware(aTarget, aCameraId, camera);
  return cameraHardware;
 }

void
GonkCameraHardware::Close()
{
  DOM_CAMERA_LOGT( "%s:%d : this=%p\n", __func__, __LINE__, (void*)this );

  mClosing = true;
  mCamera->stopPreview();
  mCamera->disconnect();
  if (mNativeWindow.get()) {
    mNativeWindow->abandon();
  }
  mCamera.clear();
  mNativeWindow.clear();

  // Ensure that ICamera's destructor is actually executed
  IPCThreadState::self()->flushCommands();
}

GonkCameraHardware::~GonkCameraHardware()
{
  DOM_CAMERA_LOGT( "%s:%d : this=%p\n", __func__, __LINE__, (void*)this );
  mCamera.clear();
  mNativeWindow.clear();

  if (mClosing) {
    return;
  }

  /**
   * Trigger the OnClosed event; the upper layers can't do anything
   * with the hardware layer once they receive this event.
   */
  if (mTarget) {
    OnClosed(mTarget);
  }
}

int
GonkCameraHardware::GetSensorOrientation(uint32_t aType)
{
  DOM_CAMERA_LOGI("%s\n", __func__);

  switch (aType) {
    case OFFSET_SENSOR_ORIENTATION:
      return mSensorOrientation;

    case RAW_SENSOR_ORIENTATION:
      return mRawSensorOrientation;

    default:
      DOM_CAMERA_LOGE("%s:%d : unknown aType=%d\n", __func__, __LINE__, aType);
      return 0;
  }
}

int
GonkCameraHardware::AutoFocus()
{
  DOM_CAMERA_LOGI("%s\n", __func__);
  return mCamera->autoFocus();
}

void
GonkCameraHardware::CancelAutoFocus()
{
  DOM_CAMERA_LOGI("%s\n", __func__);
  mCamera->cancelAutoFocus();
}

int
GonkCameraHardware::TakePicture()
{
  return mCamera->takePicture(CAMERA_MSG_SHUTTER | CAMERA_MSG_COMPRESSED_IMAGE);
}

void
GonkCameraHardware::CancelTakePicture()
{
  DOM_CAMERA_LOGW("%s: android::Camera do not provide this capability\n", __func__);
}

int
GonkCameraHardware::PushParameters(const CameraParameters& aParams)
{
  String8 s = aParams.flatten();
  return mCamera->setParameters(s);
}

void
GonkCameraHardware::PullParameters(CameraParameters& aParams)
{
  const String8 s = mCamera->getParameters();
  aParams.unflatten(s);
}

int
GonkCameraHardware::StartPreview()
{
  DOM_CAMERA_LOGT("%s:%d : this=%p\n", __func__, __LINE__, this);
  return mCamera->startPreview();
}

void
GonkCameraHardware::StopPreview()
{
  DOM_CAMERA_LOGT("%s:%d : this=%p\n", __func__, __LINE__, this);
  return mCamera->stopPreview();
}

int
GonkCameraHardware::StartRecording()
{
  DOM_CAMERA_LOGT("%s:%d : this=%p\n", __func__, __LINE__, this);
  int rv = OK;

  rv = mCamera->startRecording();
  if (rv != OK) {
    DOM_CAMERA_LOGE("mHardware->startRecording() failed with status %d", rv);
  }
  return rv;
}

int
GonkCameraHardware::StopRecording()
{
  DOM_CAMERA_LOGT("%s:%d : this=%p\n", __func__, __LINE__, this);
  mCamera->stopRecording();
  return OK;
}

int
GonkCameraHardware::SetListener(const sp<GonkCameraListener>& aListener)
{
  mListener = aListener;
  return OK;
}

void
GonkCameraHardware::ReleaseRecordingFrame(const sp<IMemory>& aFrame)
{
  mCamera->releaseRecordingFrame(aFrame);
}

int
GonkCameraHardware::StoreMetaDataInBuffers(bool aEnabled)
{
  return mCamera->storeMetaDataInBuffers(aEnabled);
}
