Question

Writing an app which takes the preview frames from camera does some transformation to it and then displays it on screen.

in

public void onPreviewFrame(byte[] data, Camera camera) {}

I take the data do yuv2rgb and some pixel manipulation in JNI in another thread. Then I create bitmap from the RGB int array and draw it using

canvas.drawBitmap(bmp, 0, 0, null);

I get around 15-20FPS on HTC Nexus One at 640×480 and 30+ FPS on Samsung Galaxy S II

I am wondering if I could speed things up by doing the drawing using Android OpenGL ES?
I would be following this guide:
http://obviam.net/index.php/texture-mapping-opengl-android-displaying-images-using-opengl-and-squares/

Answer 1

Implemented OpenGL ES and it does help with performance