looking for optimized BitPack and BitUnpack functions

howy

Intellectual 460 points

Is there a DSP lib somewhere that contains an optimized BitPack and BitUnpack function?

The function would pack or unpack a vector of variable length words into/from a bit stream.

These functions would be needed in any audio or video compression algorithm.

I am looking to replace my own C functions with assembly versions for c5509a, c6713 and c6747.

Thanks,

-howy

over 16 years ago

0 Mariana over 16 years ago

TI__Mastermind 24340 points

DSP Lib does not have it.

You can find something similar to what you want in the intrinsics. See pages 169 and 170 (_ext, _clr, _set ) of the document:

http://focus.ti.com/general/docs/techdocsabstract.tsp?abstractName=spru187o

0 DaveB123 over 16 years ago

TI__Expert 4745 points

http://focus.ti.com/docs/toolsw/folders/print/sprc264.html

The above link contains the downloadable library of 64x+ image processing algorithms. It includes some modules commonly used in image compression such as Run Length coding and Quantization.

Although the library is targeted at 64x+, it might be helpful as a good reference and is "Code Composer" friendly.

Hope this helps.

Processors

Processors forum

looking for optimized BitPack and BitUnpack functions