Android Open Source - Operation-Valkyrie Video Capture






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Java Source Code

package org.opencv.highgui;
/*from ww w  .j a  va2  s.com*/
import java.util.List;
import java.util.LinkedList;

import org.opencv.core.Mat;
import org.opencv.core.Size;

// C++: class VideoCapture
/**
 * <p>Class for video capturing from video files or cameras.
 * The class provides C++ API for capturing video from cameras or for reading
 * video files. Here is how the class can be used:</p>
 *
 * <p>Note: In C API the black-box structure <code>CvCapture</code> is used instead
 * of <code>VideoCapture</code>.</p>
 *
 * @see <a href="http://docs.opencv.org/modules/highgui/doc/reading_and_writing_images_and_video.html#videocapture">org.opencv.highgui.VideoCapture</a>
 */
public class VideoCapture {

    protected final long nativeObj;

    protected VideoCapture(long addr) {
        nativeObj = addr;
    }

    //
    // C++: VideoCapture::VideoCapture()
    //

/**
 * <p>VideoCapture constructors.</p>
 *
 * <p>Note: In C API, when you finished working with video, release
 * <code>CvCapture</code> structure with <code>cvReleaseCapture()</code>, or use
 * <code>Ptr<CvCapture></code> that calls <code>cvReleaseCapture()</code>
 * automatically in the destructor.</p>
 *
 * @see <a href="http://docs.opencv.org/modules/highgui/doc/reading_and_writing_images_and_video.html#videocapture-videocapture">org.opencv.highgui.VideoCapture.VideoCapture</a>
 */
    public VideoCapture()
    {

        nativeObj = n_VideoCapture();

        return;
    }

    //
    // C++: VideoCapture::VideoCapture(int device)
    //

/**
 * <p>VideoCapture constructors.</p>
 *
 * <p>Note: In C API, when you finished working with video, release
 * <code>CvCapture</code> structure with <code>cvReleaseCapture()</code>, or use
 * <code>Ptr<CvCapture></code> that calls <code>cvReleaseCapture()</code>
 * automatically in the destructor.</p>
 *
 * @param device id of the opened video capturing device (i.e. a camera index).
 * If there is a single camera connected, just pass 0.
 *
 * @see <a href="http://docs.opencv.org/modules/highgui/doc/reading_and_writing_images_and_video.html#videocapture-videocapture">org.opencv.highgui.VideoCapture.VideoCapture</a>
 */
    public VideoCapture(int device)
    {

        nativeObj = n_VideoCapture(device);

        return;
    }

    //
    // C++: double VideoCapture::get(int propId)
    //

/**
 * Returns the specified "VideoCapture" property
 *
 * Note: When querying a property that is not supported by the backend used by
 * the "VideoCapture" class, value 0 is returned.
 *
 * @param propId Property identifier. It can be one of the following:
 *   * CV_CAP_PROP_FRAME_WIDTH Width of the frames in the video stream.
 *   * CV_CAP_PROP_FRAME_HEIGHT Height of the frames in the video stream.
 *
 * @see <a href="http://opencv.itseez.com/modules/highgui/doc/reading_and_writing_images_and_video.html#videocapture-get">org.opencv.highgui.VideoCapture.get</a>
 */
    public double get(int propId)
    {

        double retVal = n_get(nativeObj, propId);

        return retVal;
    }

    public List<Size> getSupportedPreviewSizes()
    {
        String[] sizes_str = n_getSupportedPreviewSizes(nativeObj).split(",");
        List<Size> sizes = new LinkedList<Size>();

        for (String str : sizes_str) {
            String[] wh = str.split("x");
            sizes.add(new Size(Double.parseDouble(wh[0]), Double.parseDouble(wh[1])));
        }

        return sizes;
    }

    //
    // C++: bool VideoCapture::grab()
    //

/**
 * <p>Grabs the next frame from video file or capturing device.</p>
 *
 * <p>The methods/functions grab the next frame from video file or camera and
 * return true (non-zero) in the case of success.</p>
 *
 * <p>The primary use of the function is in multi-camera environments, especially
 * when the cameras do not have hardware synchronization. That is, you call
 * <code>VideoCapture.grab()</code> for each camera and after that call the
 * slower method <code>VideoCapture.retrieve()</code> to decode and get frame
 * from each camera. This way the overhead on demosaicing or motion jpeg
 * decompression etc. is eliminated and the retrieved frames from different
 * cameras will be closer in time.</p>
 *
 * <p>Also, when a connected camera is multi-head (for example, a stereo camera or
 * a Kinect device), the correct way of retrieving data from it is to call
 * "VideoCapture.grab" first and then call "VideoCapture.retrieve" one or more
 * times with different values of the <code>channel</code> parameter. See
 * http://code.opencv.org/svn/opencv/trunk/opencv/samples/cpp/kinect_maps.cpp</p>
 *
 * @see <a href="http://docs.opencv.org/modules/highgui/doc/reading_and_writing_images_and_video.html#videocapture-grab">org.opencv.highgui.VideoCapture.grab</a>
 */
    public boolean grab()
    {

        boolean retVal = n_grab(nativeObj);

        return retVal;
    }

    //
    // C++: bool VideoCapture::isOpened()
    //

/**
 * <p>Returns true if video capturing has been initialized already.</p>
 *
 * <p>If the previous call to <code>VideoCapture</code> constructor or
 * <code>VideoCapture.open</code> succeeded, the method returns true.</p>
 *
 * @see <a href="http://docs.opencv.org/modules/highgui/doc/reading_and_writing_images_and_video.html#videocapture-isopened">org.opencv.highgui.VideoCapture.isOpened</a>
 */
    public boolean isOpened()
    {

        boolean retVal = n_isOpened(nativeObj);

        return retVal;
    }

    //
    // C++: bool VideoCapture::open(int device)
    //

/**
 * <p>Open video file or a capturing device for video capturing</p>
 *
 * <p>The methods first call "VideoCapture.release" to close the already opened
 * file or camera.</p>
 *
 * @param device id of the opened video capturing device (i.e. a camera index).
 *
 * @see <a href="http://docs.opencv.org/modules/highgui/doc/reading_and_writing_images_and_video.html#videocapture-open">org.opencv.highgui.VideoCapture.open</a>
 */
    public boolean open(int device)
    {

        boolean retVal = n_open(nativeObj, device);

        return retVal;
    }

    //
    // C++: bool VideoCapture::read(Mat image)
    //

/**
 * <p>Grabs, decodes and returns the next video frame.</p>
 *
 * <p>The methods/functions combine "VideoCapture.grab" and "VideoCapture.retrieve"
 * in one call. This is the most convenient method for reading video files or
 * capturing data from decode and return the just grabbed frame. If no frames
 * has been grabbed (camera has been disconnected, or there are no more frames
 * in video file), the methods return false and the functions return NULL
 * pointer.</p>
 *
 * <p>Note: OpenCV 1.x functions <code>cvRetrieveFrame</code> and <code>cv.RetrieveFrame</code>
 * return image stored inside the video capturing structure. It is not allowed
 * to modify or release the image! You can copy the frame using "cvCloneImage"
 * and then do whatever you want with the copy.</p>
 *
 * @param image a image
 *
 * @see <a href="http://docs.opencv.org/modules/highgui/doc/reading_and_writing_images_and_video.html#videocapture-read">org.opencv.highgui.VideoCapture.read</a>
 */
    public boolean read(Mat image)
    {

        boolean retVal = n_read(nativeObj, image.nativeObj);

        return retVal;
    }

    //
    // C++: void VideoCapture::release()
    //

/**
 * <p>Closes video file or capturing device.</p>
 *
 * <p>The methods are automatically called by subsequent "VideoCapture.open" and
 * by <code>VideoCapture</code> destructor.</p>
 *
 * <p>The C function also deallocates memory and clears <code>*capture</code>
 * pointer.</p>
 *
 * @see <a href="http://docs.opencv.org/modules/highgui/doc/reading_and_writing_images_and_video.html#videocapture-release">org.opencv.highgui.VideoCapture.release</a>
 */
    public void release()
    {

        n_release(nativeObj);

        return;
    }

    //
    // C++: bool VideoCapture::retrieve(Mat image, int channel = 0)
    //

/**
 * <p>Decodes and returns the grabbed video frame.</p>
 *
 * <p>The methods/functions decode and return the just grabbed frame. If no frames
 * has been grabbed (camera has been disconnected, or there are no more frames
 * in video file), the methods return false and the functions return NULL
 * pointer.</p>
 *
 * <p>Note: OpenCV 1.x functions <code>cvRetrieveFrame</code> and <code>cv.RetrieveFrame</code>
 * return image stored inside the video capturing structure. It is not allowed
 * to modify or release the image! You can copy the frame using "cvCloneImage"
 * and then do whatever you want with the copy.</p>
 *
 * @param image a image
 * @param channel a channel
 *
 * @see <a href="http://docs.opencv.org/modules/highgui/doc/reading_and_writing_images_and_video.html#videocapture-retrieve">org.opencv.highgui.VideoCapture.retrieve</a>
 */
    public boolean retrieve(Mat image, int channel)
    {

        boolean retVal = n_retrieve(nativeObj, image.nativeObj, channel);

        return retVal;
    }

/**
 * <p>Decodes and returns the grabbed video frame.</p>
 *
 * <p>The methods/functions decode and return the just grabbed frame. If no frames
 * has been grabbed (camera has been disconnected, or there are no more frames
 * in video file), the methods return false and the functions return NULL
 * pointer.</p>
 *
 * <p>Note: OpenCV 1.x functions <code>cvRetrieveFrame</code> and <code>cv.RetrieveFrame</code>
 * return image stored inside the video capturing structure. It is not allowed
 * to modify or release the image! You can copy the frame using "cvCloneImage"
 * and then do whatever you want with the copy.</p>
 *
 * @param image a image
 *
 * @see <a href="http://docs.opencv.org/modules/highgui/doc/reading_and_writing_images_and_video.html#videocapture-retrieve">org.opencv.highgui.VideoCapture.retrieve</a>
 */
    public boolean retrieve(Mat image)
    {

        boolean retVal = n_retrieve(nativeObj, image.nativeObj);

        return retVal;
    }

    //
    // C++: bool VideoCapture::set(int propId, double value)
    //

/**
 * Sets a property in the "VideoCapture".
 *
 * @param propId Property identifier. It can be one of the following:
 *   * CV_CAP_PROP_FRAME_WIDTH Width of the frames in the video stream.
 *   * CV_CAP_PROP_FRAME_HEIGHT Height of the frames in the video stream.
 * @param value Value of the property.
 *
 * @see <a href="http://opencv.itseez.com/modules/highgui/doc/reading_and_writing_images_and_video.html#videocapture-set">org.opencv.highgui.VideoCapture.set</a>
 */
    public boolean set(int propId, double value)
    {

        boolean retVal = n_set(nativeObj, propId, value);

        return retVal;
    }

    @Override
    protected void finalize() throws Throwable {
        n_delete(nativeObj);
        super.finalize();
    }

    // native stuff

    static {
        System.loadLibrary("opencv_java");
    }

    // C++: VideoCapture::VideoCapture()
    private static native long n_VideoCapture();

    // C++: VideoCapture::VideoCapture(string filename)
    private static native long n_VideoCapture(java.lang.String filename);

    // C++: VideoCapture::VideoCapture(int device)
    private static native long n_VideoCapture(int device);

    // C++: double VideoCapture::get(int propId)
    private static native double n_get(long nativeObj, int propId);

    // C++: bool VideoCapture::grab()
    private static native boolean n_grab(long nativeObj);

    // C++: bool VideoCapture::isOpened()
    private static native boolean n_isOpened(long nativeObj);

    // C++: bool VideoCapture::open(string filename)
    private static native boolean n_open(long nativeObj, java.lang.String filename);

    // C++: bool VideoCapture::open(int device)
    private static native boolean n_open(long nativeObj, int device);

    // C++: bool VideoCapture::read(Mat image)
    private static native boolean n_read(long nativeObj, long image_nativeObj);

    // C++: void VideoCapture::release()
    private static native void n_release(long nativeObj);

    // C++: bool VideoCapture::retrieve(Mat image, int channel = 0)
    private static native boolean n_retrieve(long nativeObj, long image_nativeObj, int channel);

    private static native boolean n_retrieve(long nativeObj, long image_nativeObj);

    // C++: bool VideoCapture::set(int propId, double value)
    private static native boolean n_set(long nativeObj, int propId, double value);

    private static native String n_getSupportedPreviewSizes(long nativeObj);

    // native support for java finalize()
    private static native void n_delete(long nativeObj);

}




Java Source Code List

org.opencv.android.Utils.java
org.opencv.calib3d.Calib3d.java
org.opencv.calib3d.StereoBM.java
org.opencv.calib3d.StereoSGBM.java
org.opencv.core.Algorithm.java
org.opencv.core.Core.java
org.opencv.core.CvException.java
org.opencv.core.CvType.java
org.opencv.core.MatOfByte.java
org.opencv.core.MatOfDMatch.java
org.opencv.core.MatOfDouble.java
org.opencv.core.MatOfFloat4.java
org.opencv.core.MatOfFloat6.java
org.opencv.core.MatOfFloat.java
org.opencv.core.MatOfInt4.java
org.opencv.core.MatOfInt.java
org.opencv.core.MatOfKeyPoint.java
org.opencv.core.MatOfPoint2f.java
org.opencv.core.MatOfPoint3.java
org.opencv.core.MatOfPoint3f.java
org.opencv.core.MatOfPoint.java
org.opencv.core.MatOfRect.java
org.opencv.core.Mat.java
org.opencv.core.Point3.java
org.opencv.core.Point.java
org.opencv.core.Range.java
org.opencv.core.Rect.java
org.opencv.core.RotatedRect.java
org.opencv.core.Scalar.java
org.opencv.core.Size.java
org.opencv.core.TermCriteria.java
org.opencv.features2d.DMatch.java
org.opencv.features2d.DescriptorExtractor.java
org.opencv.features2d.DescriptorMatcher.java
org.opencv.features2d.FeatureDetector.java
org.opencv.features2d.Features2d.java
org.opencv.features2d.GenericDescriptorMatcher.java
org.opencv.features2d.KeyPoint.java
org.opencv.highgui.Highgui.java
org.opencv.highgui.VideoCapture.java
org.opencv.imgproc.Imgproc.java
org.opencv.imgproc.Moments.java
org.opencv.imgproc.Subdiv2D.java
org.opencv.ml.CvANN_MLP_TrainParams.java
org.opencv.ml.CvANN_MLP.java
org.opencv.ml.CvBoostParams.java
org.opencv.ml.CvBoost.java
org.opencv.ml.CvDTreeParams.java
org.opencv.ml.CvDTree.java
org.opencv.ml.CvERTrees.java
org.opencv.ml.CvGBTreesParams.java
org.opencv.ml.CvGBTrees.java
org.opencv.ml.CvKNearest.java
org.opencv.ml.CvNormalBayesClassifier.java
org.opencv.ml.CvParamGrid.java
org.opencv.ml.CvRTParams.java
org.opencv.ml.CvRTrees.java
org.opencv.ml.CvSVMParams.java
org.opencv.ml.CvSVM.java
org.opencv.ml.CvStatModel.java
org.opencv.ml.EM.java
org.opencv.ml.Ml.java
org.opencv.objdetect.CascadeClassifier.java
org.opencv.objdetect.HOGDescriptor.java
org.opencv.objdetect.Objdetect.java
org.opencv.photo.Photo.java
org.opencv.utils.Converters.java
org.opencv.video.BackgroundSubtractorMOG.java
org.opencv.video.BackgroundSubtractor.java
org.opencv.video.KalmanFilter.java
org.opencv.video.Video.java
valkyrie.colorpicker.ColorPickerDialog.java
valkyrie.colorpicker.ColorPicker.java
valkyrie.file.DecodeBitmaps.java
valkyrie.file.FileManager.java
valkyrie.filter.FilterAssets.java
valkyrie.filter.FilterInternalStorage.java
valkyrie.filter.FilterManager.java
valkyrie.filter.FilterUIPosition.java
valkyrie.filter.IFilter.java
valkyrie.filter.ascii.Ascii.java
valkyrie.filter.ascii.Converter.java
valkyrie.filter.ascii.Font.java
valkyrie.filter.ascii.Options.java
valkyrie.filter.canny.Canny.java
valkyrie.filter.grayscale.Grayscale.java
valkyrie.filter.nofilter.NoFilter.java
valkyrie.ui.IUpdateableUI.java
valkyrie.ui.LayoutManager.java
valkyrie.ui.MainActivity.java
valkyrie.ui.UpdateableRelativeLayout.java
valkyrie.ui.gallery.AboutActivity.java
valkyrie.ui.gallery.GalleryActivity.java
valkyrie.ui.gallery.ImageAdapter.java
valkyrie.ui.gallery.ShowPicActivity.java
valkyrie.ui.preview.CameraPreviewViewCV.java
valkyrie.widget.MultiDirectionSlidingDrawer.java
valkyrie.widget.TouchImageView.java