/*
 * 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 "base/basictypes.h"
#include "VideoUtils.h"
#include "GonkCameraHwMgr.h"
#include "GonkCameraPreview.h"

#define DOM_CAMERA_LOG_LEVEL  2
#include "CameraCommon.h"

#include "GonkIOSurfaceImage.h"

using namespace mozilla;

void
GonkCameraPreview::ReceiveFrame(mozilla::layers::GraphicBufferLocked* aBuffer)
{
  DOM_CAMERA_LOGI("%s:%d : this=%p\n", __func__, __LINE__, this);
  if (!aBuffer)
    return;

  ImageFormat format = ImageFormat::GONK_IO_SURFACE;
  nsRefPtr<Image> image = mImageContainer->CreateImage(&format, 1);
  GonkIOSurfaceImage* videoImage = static_cast<GonkIOSurfaceImage*>(image.get());
  GonkIOSurfaceImage::Data data;
  data.mGraphicBuffer = aBuffer;
  data.mPicSize = gfxIntSize(mWidth, mHeight);
  videoImage->SetData(data);

  // AppendFrame() takes over image's reference
  mVideoSegment.AppendFrame(image.forget(), 1, gfxIntSize(mWidth, mHeight));
  mInput->AppendToTrack(TRACK_VIDEO, &mVideoSegment);

  mFrameCount += 1;

  if ((mFrameCount % 10) == 0) {
    DOM_CAMERA_LOGI("%s:%d : mFrameCount = %d\n", __func__, __LINE__, mFrameCount);
  }
}

nsresult
GonkCameraPreview::StartImpl()
{
  DOM_CAMERA_LOGI("%s:%d : this=%p\n", __func__, __LINE__, this);

  /**
   * We set and then immediately get the preview size, in case the camera
   * driver has decided to ignore our given dimensions.
   */
  GonkCameraHardware::SetPreviewSize(mHwHandle, mWidth, mHeight);
  GonkCameraHardware::GetPreviewSize(mHwHandle, &mWidth, &mHeight);
  SetFrameRate(GonkCameraHardware::GetFps(mHwHandle));

  if (GonkCameraHardware::StartPreview(mHwHandle) != OK) {
    DOM_CAMERA_LOGE("%s: failed to start preview\n", __func__);
    return NS_ERROR_FAILURE;
  }

  // GetPreviewFormat() must be called after StartPreview().
  mFormat = GonkCameraHardware::GetPreviewFormat(mHwHandle);
  DOM_CAMERA_LOGI("preview stream is (actually!) %d x %d (w x h), %d frames per second, format %d\n", mWidth, mHeight, mFramesPerSecond, mFormat);
  return NS_OK;
}

nsresult
GonkCameraPreview::StopImpl()
{
  DOM_CAMERA_LOGI("%s:%d : this=%p\n", __func__, __LINE__, this);

  GonkCameraHardware::StopPreview(mHwHandle);
  mInput->EndTrack(TRACK_VIDEO);
  mInput->Finish();

  return NS_OK;
}