[FFmpeg-devel] Mixed data type in SIMD code?

Loren Merritt lorenm
Tue Mar 4 00:30:08 CET 2008


On Mon, 3 Mar 2008, Michael Niedermayer wrote:
>
> Also i doubt we use or ever will use packed double.

flac encoder does. Single isn't precise enough for a linear sum of up 
to 16k elements. Reordering the sum to a tree made it half-way 
decent decent precision, but also made it as slow as double.

--Loren Merritt




More information about the ffmpeg-devel mailing list