Java RawData类代码示例

import com.ni.vision.NIVision.RawData; //导入依赖的package包/类
private synchronized void setImageData(RawData data, int start) {
//flip it here, since it is called by setImage anyways
if(flipped){
	//make an image out of data
	Image image = null;
	NIVision.imaqUnflatten(image, data, data.getBuffer().array().length);
	//flip it
	Image flippedImage = null;
	NIVision.imaqFlip(flippedImage, image, FlipAxis.HORIZONTAL_AXIS);
	//change data to the data of the flipped image
	data = NIVision.imaqFlatten(flippedImage, NIVision.FlattenType.FLATTEN_IMAGE,
            NIVision.CompressionType.COMPRESSION_JPEG, 10 * m_quality);
}
if (m_imageData != null && m_imageData.data != null) {
     m_imageData.data.free();
     if (m_imageData.data.getBuffer() != null){
       m_imageDataPool.addLast(m_imageData.data.getBuffer());
     }
     m_imageData = null;
   }
   m_imageData = new CameraData(data, start);
   notifyAll();
 }
 

import com.ni.vision.NIVision.RawData; //导入依赖的package包/类
/**
 * Manually change the image that is served by the MJPEG stream. This can be
 * called to pass custom annotated images to the dashboard. Note that, for
 * 640x480 video, this method could take between 40 and 50 milliseconds to
 * complete.
 *
 * This shouldn't be called if {@link #startAutomaticCapture} is called.
 *
 * @param image The IMAQ image to show on the dashboard
 */
public void setImage(Image image) {
  // handle multi-threadedness

  /* Flatten the IMAQ image to a JPEG */
  RawData data =
      NIVision.imaqFlatten(image, NIVision.FlattenType.FLATTEN_IMAGE,
          NIVision.CompressionType.COMPRESSION_JPEG, 10 * m_quality);
  ByteBuffer buffer = data.getBuffer();
  boolean hwClient;

  synchronized (this) {
    hwClient = m_hwClient;
  }

  /* Find the start of the JPEG data */
  int index = 0;
  if (hwClient) {
    while (index < buffer.limit() - 1) {
      if ((buffer.get(index) & 0xff) == 0xFF && (buffer.get(index + 1) & 0xff) == 0xD8)
        break;
      index++;
    }
  }

  if (buffer.limit() - index - 1 <= 2) {
    throw new VisionException("data size of flattened image is less than 2. Try another camera! ");
  }

  setImageData(data, index);
}
 

import com.ni.vision.NIVision.RawData; //导入依赖的package包/类
protected void capture() {
  Image frame = NIVision.imaqCreateImage(NIVision.ImageType.IMAGE_RGB, 0);
  while (true) {
    boolean hwClient;
    ByteBuffer dataBuffer = null;
    synchronized (this) {
      hwClient = m_hwClient;
      if (hwClient) {
        dataBuffer = m_imageDataPool.removeLast();
      }
    }

    try {
      if (hwClient && dataBuffer != null) {
        // Reset the image buffer limit
        dataBuffer.limit(dataBuffer.capacity() - 1);
        m_camera[selectedCamera].getImageData(dataBuffer);
        setImageData(new RawData(dataBuffer), 0);
      } else {
        m_camera[selectedCamera].getImage(frame);
        setImage(frame);
      }
    } catch (VisionException ex) {
      //DriverStation.reportError("Error when getting image from the camera: " + ex.getMessage(),true);
      if (dataBuffer != null) {
        synchronized (this) {
          m_imageDataPool.addLast(dataBuffer);
          Timer.delay(.1);
        }
      }
    }
  }
}
 

import com.ni.vision.NIVision.RawData; //导入依赖的package包/类
private synchronized void setImageData(RawData data, int start) {
  if (m_imageData != null && m_imageData.data != null) {
    m_imageData.data.free();
    if (m_imageData.data.getBuffer() != null)
      m_imageDataPool.addLast(m_imageData.data.getBuffer());
    m_imageData = null;
  }
  m_imageData = new CameraData(data, start);
  notifyAll();
}
 

import com.ni.vision.NIVision.RawData; //导入依赖的package包/类
/**
 * Manually change the image that is served by the MJPEG stream. This can be
 * called to pass custom annotated images to the dashboard. Note that, for
 * 640x480 video, this method could take between 40 and 50 milliseconds to
 * complete.
 *
 * 
 *
 * @param image The IMAQ image to show on the dashboard
 */
public void setImage(Image image) {
  // handle multi-threadedness

  /* Flatten the IMAQ image to a JPEG */

  RawData data =
      NIVision.imaqFlatten(image, NIVision.FlattenType.FLATTEN_IMAGE,
          NIVision.CompressionType.COMPRESSION_JPEG, 10 * m_quality);
  ByteBuffer buffer = data.getBuffer();
  boolean hwClient;

  synchronized (this) {
    hwClient = m_hwClient;
  }

  /* Find the start of the JPEG data */
  int index = 0;
  if (hwClient) {
    while (index < buffer.limit() - 1) {
      if ((buffer.get(index) & 0xff) == 0xFF && (buffer.get(index + 1) & 0xff) == 0xD8)
        break;
      index++;
    }
  }

  if (buffer.limit() - index - 1 <= 2) {
    throw new VisionException("data size of flattened image is less than 2. Try another camera! ");
  }

  setImageData(data, index);
}
 

import com.ni.vision.NIVision.RawData; //导入依赖的package包/类
protected void capture() {
  Image frame = NIVision.imaqCreateImage(NIVision.ImageType.IMAGE_RGB, 0);
  while (true) {
    boolean hwClient;
    ByteBuffer dataBuffer = null;
    synchronized (this) {
      hwClient = m_hwClient;
      if (hwClient) {
        dataBuffer = m_imageDataPool.removeLast();
      }
    }

    try {
      if (hwClient && dataBuffer != null) {
        // Reset the image buffer limit
        dataBuffer.limit(dataBuffer.capacity() - 1);
        m_camera.getImageData(dataBuffer);
        setImageData(new RawData(dataBuffer), 0);
      } else {
        m_camera.getImage(frame);
        setImage(frame);
      }
    } catch (VisionException ex) {
      DriverStation.reportError("Error when getting image from the camera: " + ex.getMessage(),
          true);
      if (dataBuffer != null) {
        synchronized (this) {
          m_imageDataPool.addLast(dataBuffer);
          Timer.delay(.1);
        }
      }
    }
  }
}
 

import com.ni.vision.NIVision.RawData; //导入依赖的package包/类
/**
 * Manually change the image that is served by the MJPEG stream. This can be
 * called to pass custom annotated images to the dashboard. Note that, for
 * 640x480 video, this method could take between 40 and 50 milliseconds to
 * complete.
 *
 * This shouldn't be called if {@link #startAutomaticCapture} is called.
 *
 * @param image The IMAQ image to show on the dashboard
 */
public void setImage(Image image) {
  // handle multi-threadedness

  /* Flatten the IMAQ image to a JPEG */

  RawData data =
      NIVision.imaqFlatten(image, NIVision.FlattenType.FLATTEN_IMAGE,
          NIVision.CompressionType.COMPRESSION_JPEG, 10 * m_quality);
  ByteBuffer buffer = data.getBuffer();
  boolean hwClient;

  synchronized (this) {
    hwClient = m_hwClient;
  }

  /* Find the start of the JPEG data */
  int index = 0;
  if (hwClient) {
    while (index < buffer.limit() - 1) {
      if ((buffer.get(index) & 0xff) == 0xFF && (buffer.get(index + 1) & 0xff) == 0xD8)
        break;
      index++;
    }
  }

  if (buffer.limit() - index - 1 <= 2) {
    throw new VisionException("data size of flattened image is less than 2. Try another camera! ");
  }

  setImageData(data, index);
}
 

import com.ni.vision.NIVision.RawData; //导入依赖的package包/类
public CameraData(RawData d, int s) {
  data = d;
  start = s;
}