(Sometimes sample_data became bad because the buffer with its values was deallocated early).

* always use "argN" names for unnamed arguments
* honor space symbol between typename and "*", "&" symbols
* fix indent errors

On some platforms sin and cos are calculated in single precision resulting in
diversity of results.

String checking and range cheching added.

Problems with Android 2.3.3 (API level 10) fixed;
Android 2.2 does not work due to unsupported camera frame format (known android-2.2 emulator issue).