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authorPaul B Mahol <onemda@gmail.com>2018-01-09 18:01:44 +0100
committerPaul B Mahol <onemda@gmail.com>2018-01-09 18:02:01 +0100
commitd38a223943d12c603c87ce806023ab4f4c0769c9 (patch)
treee051b45771f3444b0b91087455b5e83e6622e3b0
parente9edd61965da9d1b907fa2685fa5caec595ad687 (diff)
downloadffmpeg-d38a223943d12c603c87ce806023ab4f4c0769c9.tar.gz
doc/filters: update aiir filter documentation
Signed-off-by: Paul B Mahol <onemda@gmail.com>
-rw-r--r--doc/filters.texi20
1 files changed, 20 insertions, 0 deletions
diff --git a/doc/filters.texi b/doc/filters.texi
index 217a2af42b..d29c40080f 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -1085,6 +1085,26 @@ Set output gain.
@item f
Set coefficients format.
Can be @code{tf} - transfer function or @code{zp} - Z-plane zeros/poles.
+Default is @code{zp}.
+
+@item r
+Set kind of processing.
+Can be @code{d} - direct or @code{s} - serial cascading. Defauls is @code{s}.
+
+@item e
+Set filtering precision.
+
+@table @option
+@item dbl
+double-precision floating-point (default)
+@item flt
+single-precision floating-point
+@item i32
+32-bit integers
+@item i16
+16-bit integers
+@end table
+
@end table
Coefficients in @code{tf} format are separated by spaces and are in ascending