[FFmpeg-devel] Float vs. fixed-point audio codecs

matthieu castet castet.matthieu
Mon May 17 23:07:23 CEST 2010

M?ns Rullg?rd <mans <at> mansr.com> writes:

> Please add your thoughts on this, particularly if there's something
> important I've overlooked.  If we can agree on an approach, I'll try
> to put some patches together as soon as possible.
Some may be stupid idea. Why not extend(or make something similar) to cpu
extension flags (mmx, sse, ...).
- cpu specific part can autodetect it (mm_support) (it can also be forced at
compile time). Dynamic autodetection can be useful for generic build that
support cpu with slow and fast fpu.

- user can overrides it with codec context (dsp_mask).
- it is natural, because fpu is an extension of the cpu. Some cpu can have more
than one fpu (x86 with sse2 or 387)


More information about the ffmpeg-devel mailing list