C++ (Cpp) CameraParameters::setPreviewFormat示例

void CameraHardwareStub::initDefaultParameters()
{
    CameraParameters p;

    p.setPreviewSize(176, 144);
    p.setPreviewFrameRate(15);
    p.setPreviewFormat("yuv422sp");

    p.setPictureSize(kCannedJpegWidth, kCannedJpegHeight);
    p.setPictureFormat("jpeg");

    if (setParameters(p) != NO_ERROR) {
        LOGE("Failed to set default parameters?!");
    }
}

示例#2

显示文件

文件： CameraHardware.cpp 项目： DBGJPR/libcamera

void CameraHardware::initDefaultParameters()
{
    CameraParameters p;

    p.setPreviewSize(160, 120);
    p.setPreviewFrameRate(15);
    p.setPreviewFormat("rgb565");

    p.setPictureSize(640, 480);
    p.setPictureFormat("rgb565");

    if (setParameters(p) != NO_ERROR) {
        LOGE("Failed to set default parameters?!");
    } 
}

示例#3

显示文件

文件： CameraHardwareStub.cpp 项目： yorklephone/android_framework_base

void CameraHardwareStub::initDefaultParameters()
{
    CameraParameters p;

    p.set(CameraParameters::KEY_SUPPORTED_PREVIEW_SIZES, "320x240");
    p.setPreviewSize(320, 240);
    p.setPreviewFrameRate(15);
    p.setPreviewFormat(CameraParameters::PIXEL_FORMAT_YUV420SP);

    p.set(CameraParameters::KEY_SUPPORTED_PICTURE_SIZES, "320x240");
    p.setPictureSize(320, 240);
    p.setPictureFormat(CameraParameters::PIXEL_FORMAT_JPEG);

    if (setParameters(p) != NO_ERROR) {
        LOGE("Failed to set default parameters?!");
    }
}

示例#4

显示文件

文件： GonkCaptureProvider.cpp 项目： TheTypoMaster/fennec-777045

NS_IMETHODIMP
GonkCameraInputStream::Init(nsACString& aContentType, nsCaptureParams* aParams)
{
  if (XRE_GetProcessType() != GeckoProcessType_Default)
    return NS_ERROR_NOT_IMPLEMENTED;

  mContentType = aContentType;
  mWidth = aParams->width;
  mHeight = aParams->height;
  mCamera = aParams->camera;

  PRUint32 maxNumCameras = getNumberOfCameras();

  if (maxNumCameras == 0)
    return NS_ERROR_FAILURE;

  if (mCamera >= maxNumCameras)
    mCamera = 0;

  mHardware = CameraHardwareInterface::openCamera(mCamera);

  if (!mHardware)
    return NS_ERROR_FAILURE;

  mHardware->setCallbacks(NULL, GonkCameraInputStream::DataCallback, NULL, this);

  mHardware->enableMsgType(CAMERA_MSG_PREVIEW_FRAME);

  CameraParameters params = mHardware->getParameters();

  printf_stderr("Preview format : %s\n", params.get(params.KEY_SUPPORTED_PREVIEW_FORMATS));

  Vector<Size> previewSizes;
  params.getSupportedPreviewSizes(previewSizes);

  // find the available preview size closest to the requested size.
  PRUint32 minSizeDelta = PR_UINT32_MAX;
  PRUint32 bestWidth = mWidth;
  PRUint32 bestHeight = mHeight;
  for (PRUint32 i = 0; i < previewSizes.size(); i++) {
    Size size = previewSizes[i];
    PRUint32 delta = abs(size.width * size.height - mWidth * mHeight); 
    if (delta < minSizeDelta) {
      minSizeDelta = delta;
      bestWidth = size.width;
      bestHeight = size.height;
    }
  }
  mWidth = bestWidth;
  mHeight = bestHeight;
  params.setPreviewSize(mWidth, mHeight);

  // try to set preferred image format
  params.setPreviewFormat("yuv420p");

  params.setPreviewFrameRate(mFps);
  mHardware->setParameters(params);
  params = mHardware->getParameters();
  mFps = params.getPreviewFrameRate();

  mIs420p = !strcmp(params.getPreviewFormat(), "yuv420p");

  mHardware->startPreview();

  mClosed = false;
  return NS_OK;
}