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authorNiklas Haas <git@haasn.xyz>2017-07-03 11:23:48 +0200
committerNiklas Haas <git@haasn.xyz>2017-07-03 11:51:37 +0200
commit8854a2bef61090fdcc6b815112ddd966ef07d771 (patch)
tree553ec82e7df0eeff9aa980c00f6ad5c14b385518 /DOCS
parent41b3b116695bcad3fdb3129b133e2a97d9a76847 (diff)
downloadmpv-8854a2bef61090fdcc6b815112ddd966ef07d771.tar.bz2
mpv-8854a2bef61090fdcc6b815112ddd966ef07d771.tar.xz
filter_kernels: add radius cutoff functionality
This allows filter functions to be prematurely cut off once their contributions start becoming insignificant. This effectively prevents wasted GPU time sampling from parts of the function that are essentially reduced to zero by the window function, providing anywhere from a 10% to 20% speedup. (5700μs -> 4700μs for me)
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-rw-r--r--DOCS/man/options.rst8
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diff --git a/DOCS/man/options.rst b/DOCS/man/options.rst
index a7ec35b3ae..94a153408a 100644
--- a/DOCS/man/options.rst
+++ b/DOCS/man/options.rst
@@ -4004,6 +4004,14 @@ The following video options are currently all specific to ``--vo=opengl`` and
fringes of black, mostly around moving edges) in exchange for potentially
adding more blur.
+``--scale-cutoff=<value>``, ``--cscale-cutoff=<value>``, ``--dscale-cutoff=<value>``
+ Cut off the filter kernel prematurely once the value range drops below
+ this threshold. Doing so allows more aggressive pruning of skippable
+ coefficients by disregarding parts of the LUT which are effectively zeroed
+ out by the window function. Only affects polar (EWA) filters. The default
+ is 0.001 for each, which is perceptually transparent but provides a 10%-20%
+ speedup, depending on the exact radius and filter kernel chosen.
+
``--scale-taper=<value>``, ``--scale-wtaper=<value>``, ``--dscale-taper=<value>``, ``--dscale-wtaper=<value>``, ``--cscale-taper=<value>``, ``--cscale-wtaper=<value>``, ``--tscale-taper=<value>``, ``--tscale-wtaper=<value>``
Kernel/window taper factor. Increasing this flattens the filter function.
Value range is 0 to 1. A value of 0 (the default) means no flattening, a