lavf: fix update_initial_durations() so it handles missing durations with the initial...

[ffmpeg] / doc / eval.texi

diff --git a/doc/eval.texi b/doc/eval.texi
index 92fdc6d0a66712ed25a901c7508f8a2f852525c9..c4b669fbcb4c6c5ceb1867f8e08353e779d4ef57 100644 (file)
--- a/doc/eval.texi
+++ b/doc/eval.texi
@@ -106,6 +106,18 @@ the evaluation of @var{y}, return 0 otherwise.
 @item ifnot(x, y)
 Evaluate @var{x}, and if the result is zero return the result of the
 evaluation of @var{y}, return 0 otherwise.
+
+@item taylor(expr, x) taylor(expr, x, id)
+Evaluate a taylor series at x.
+expr represents the LD(id)-th derivates of f(x) at 0. If id is not specified
+then 0 is assumed.
+note, when you have the derivatives at y instead of 0
+taylor(expr, x-y) can be used
+When the series does not converge the results are undefined.
+
+@item root(expr, max)
+Finds x where f(x)=0 in the interval 0..max.
+f() must be continuous or the result is undefined.
 @end table
 
 The following constants are available: