[vorbis-dev] mdct.c

Alan MacDonald newslists at warpzillion.com
Thu Mar 21 19:09:04 PST 2002



> How about this vorbis_book_decodevv_add and its children? From my profile
> information it consumes 20.5% of time. Do you think it is
> worth/possible/difficult to do it in hardware?
>

All the codebook related stuff is intensive as far as bit packing because of
the huffman coding.  Which means you have to mask and shift a lot in order
to extract the data.  Unless you have built in bit operations in your
hardware, it can be require a decent amount of operations.

Later,
Alan

<p>--- >8 ----
List archives:  http://www.xiph.org/archives/
Ogg project homepage: http://www.xiph.org/ogg/
To unsubscribe from this list, send a message to 'vorbis-dev-request at xiph.org'
containing only the word 'unsubscribe' in the body.  No subject is needed.
Unsubscribe messages sent to the list will be ignored/filtered.



More information about the Vorbis-dev mailing list