Esempio n. 1
0
  /**
   * Read screen and store result in native buffer.
   *
   * @param dim dimension of the video
   * @return true if success, false otherwise
   */
  private ByteBuffer readScreenNative(Dimension dim) {
    int size = dim.width * dim.height * 4 + FFmpeg.FF_INPUT_BUFFER_PADDING_SIZE;
    ByteBuffer data = byteBufferPool.getBuffer(size);

    data.setLength(size);

    /* get desktop screen via native grabber */
    boolean b;

    try {
      b =
          desktopInteract.captureScreen(
              displayIndex, x, y, dim.width, dim.height, data.getPtr(), data.getLength());
    } catch (Throwable t) {
      if (t instanceof ThreadDeath) {
        throw (ThreadDeath) t;
      } else {
        b = false;
        //                logger.error("Failed to grab screen!", t);
      }
    }
    if (!b) {
      data.free();
      data = null;
    }
    return data;
  }
Esempio n. 2
0
  /**
   * Read screen.
   *
   * @param output output buffer for screen bytes
   * @param dim dimension of the screen
   * @return raw bytes, it could be equal to output or not. Take care in the caller to check if
   *     output is the returned value.
   */
  public byte[] readScreen(byte[] output, Dimension dim) {
    VideoFormat format = (VideoFormat) getFormat();
    Dimension formatSize = format.getSize();
    int width = formatSize.width;
    int height = formatSize.height;
    BufferedImage scaledScreen = null;
    BufferedImage screen = null;
    byte data[] = null;
    int size = width * height * 4;

    // If output is not large enough, enlarge it.
    if ((output == null) || (output.length < size)) output = new byte[size];

    /* get desktop screen via native grabber if available */
    if (desktopInteract.captureScreen(displayIndex, x, y, dim.width, dim.height, output)) {
      return output;
    }

    System.out.println("failed to grab with native! " + output.length);

    /* OK native grabber failed or is not available,
     * try with AWT Robot and convert it to the right format
     *
     * Note that it is very memory consuming since memory are allocated
     * to capture screen (via Robot) and then for converting to raw bytes
     * Moreover support for multiple display has not yet been investigated
     *
     * Normally not of our supported platform (Windows (x86, x64),
     * Linux (x86, x86-64), Mac OS X (i386, x86-64, ppc) and
     * FreeBSD (x86, x86-64) should go here.
     */
    screen = desktopInteract.captureScreen();

    if (screen != null) {
      /* convert to ARGB BufferedImage */
      scaledScreen =
          ImgStreamingUtils.getScaledImage(screen, width, height, BufferedImage.TYPE_INT_ARGB);
      /* get raw bytes */
      data = ImgStreamingUtils.getImageBytes(scaledScreen, output);
    }

    screen = null;
    scaledScreen = null;
    return data;
  }