public void requestAspectRatio(double aspectRatio) {
		if (mVARM.getAspectRatio() != aspectRatio) {
			mVARM.setAspectRatio(aspectRatio);
			mHandler.post(new Runnable() {
				@Override
				public void run() {
					if (mAspectRatioMode == ASPECT_RATIO_PREVIEW) {
						requestLayout();
					}
				}
			});
		}
	}
Requests a certain aspect ratio for the preview. You don't have to call this yourself, 
the {@link VideoStream} will do it when it's needed.
src/net/majorkernelpanic/streaming/gl/SurfaceView.java