How to use

setImageData

method

in

com.google.android.gms.vision.Frame$Builder

/**
 * Creates a new frame based on the original frame, with additional width on the right to
 * increase the size to avoid the bug in the underlying face detector.
 */
private Frame padFrameRight(Frame originalFrame, int newWidth) {
  Frame.Metadata metadata = originalFrame.getMetadata();
  int width = metadata.getWidth();
  int height = metadata.getHeight();
  Log.i(TAG, "Padded image from: " + width + "x" + height + " to " + newWidth + "x" + height);
  ByteBuffer origBuffer = originalFrame.getGrayscaleImageData();
  int origOffset = origBuffer.arrayOffset();
  byte[] origBytes = origBuffer.array();
  // This can be changed to just .allocate in the future, when Frame supports non-direct
  // byte buffers.
  ByteBuffer paddedBuffer = ByteBuffer.allocateDirect(newWidth * height);
  int paddedOffset = paddedBuffer.arrayOffset();
  byte[] paddedBytes = paddedBuffer.array();
  Arrays.fill(paddedBytes, (byte) 0);
  for (int y = 0; y < height; ++y) {
    int origStride = origOffset + y * width;
    int paddedStride = paddedOffset + y * newWidth;
    System.arraycopy(origBytes, origStride, paddedBytes, paddedStride, width);
  }
  return new Frame.Builder()
      .setImageData(paddedBuffer, newWidth, height, ImageFormat.NV21)
      .setId(metadata.getId())
      .setRotation(metadata.getRotation())
      .setTimestampMillis(metadata.getTimestampMillis())
      .build();
}

.setImageData(paddedBuffer, width, newHeight, ImageFormat.NV21)
.setId(metadata.getId())
.setRotation(metadata.getRotation())

.setImageData(mPendingFrameData, mPreviewSize.getWidth(),
    mPreviewSize.getHeight(), ImageFormat.NV21)
.setId(mPendingFrameId)

.setImageData(mPendingFrameData, mPreviewSize.getWidth(),
    mPreviewSize.getHeight(), ImageFormat.NV21)
.setId(mPendingFrameId)

.setImageData(mPendingFrameData, mPreviewSize.getWidth(),
    mPreviewSize.getHeight(), ImageFormat.NV21)
.setId(mPendingFrameId)

.setImageData(mPendingFrameData, mPreviewSize.getWidth(),
    mPreviewSize.getHeight(), ImageFormat.NV21)
.setId(mPendingFrameId)

.setImageData(mPendingFrameData, mPreviewSize.getWidth(),
    mPreviewSize.getHeight(), ImageFormat.NV21)
.setId(mPendingFrameId)

.setImageData(ByteBuffer.wrap(quarterNV21(mPendingFrameData, mPreviewSize.getWidth(), mPreviewSize.getHeight())), mPreviewSize.getWidth()/4, mPreviewSize.getHeight()/4, ImageFormat.NV21)
.setId(mPendingFrameId)
.setTimestampMillis(mPendingTimeMillis)

.setImageData(quarterNV21(mPendingFrameData, previewW, previewH), previewW/4, previewH/4, ImageFormat.NV21)
.setId(mPendingFrameId)
.setTimestampMillis(mPendingTimeMillis)

.setImageData(mPendingFrameData, mPreviewSize.getWidth(),
    mPreviewSize.getHeight(), ImageFormat.NV21)
.setId(mPendingFrameId)

.setImageData(mPendingFrameData, previewSize.getWidth(),
    previewSize.getHeight(), ImageFormat.NV21)
.setId(mPendingFrameId)

.setImageData(mPendingFrameData, mPreviewSize.getWidth(),
    mPreviewSize.getHeight(), ImageFormat.NV21)
.setId(mPendingFrameId)