[MPlayer-dev-eng] [PATCH] HRTF matrix decoder enhancements

[Jindrich Makovicka]

Yue Shi Lai wrote:
> Attached is a patch to enhance the matrix decoder in HRTF filter with
> two features:
> 
> - a passive locking mechanism to enable the matrix to switch between
> active and passive mode, which enhances the stereo image.
> 
> - a center front cancellation algorithm that damps the cross-talk if the
> sound is coming predominantly from center (e.g. if there is dialogue).
> 
> These two new features should enhance the quality of surround downmix
> noticeably.
> 
> Also a correction to the active gain control is included. The previous
> implementation of Lt + Rt/Lt - Rt AGC should be fine in most cases, but
> the calculation was inconsistent (gain unitarity is not guaranteed to be
> preserved).

Committed.

Please, could you also write some documentation to the manual page,
especially clarify the filter options?

Best regards,
-- 
Jindrich Makovicka