public synchronized void onNewFrame(UserTracker tracker) {
if (mLastFrame != null) {
mLastFrame.release();
mLastFrame = null;
}
mLastFrame = mTracker.readFrame();
// check if any new user detected
for (UserData user : mLastFrame.getUsers()) {
if (user.isNew()) {
// start skeleton tracking
mTracker.startSkeletonTracking(user.getId());
}
}
VideoFrameRef depthFrame = mLastFrame.getDepthFrame();
if (depthFrame != null) {
ByteBuffer frameData = depthFrame.getData().order(ByteOrder.LITTLE_ENDIAN);
ByteBuffer usersFrame = mLastFrame.getUserMap().getPixels().order(ByteOrder.LITTLE_ENDIAN);
// make sure we have enough room
if (mDepthPixels == null
|| mDepthPixels.length < depthFrame.getWidth() * depthFrame.getHeight()) {
mDepthPixels = new int[depthFrame.getWidth() * depthFrame.getHeight()];
}
calcHist(frameData);
frameData.rewind();
int pos = 0;
while (frameData.remaining() > 0) {
short depth = frameData.getShort();
short userId = usersFrame.getShort();
short pixel = (short) mHistogram[depth];
int color = 0xFFFFFFFF;
if (userId > 0) {
color = mColors[userId % mColors.length];
}
mDepthPixels[pos] = color & (0xFF000000 | (pixel << 16) | (pixel << 8) | pixel);
pos++;
}
}
repaint();
}