| Message ID | 20240410134742.58446-1-stefasab@gmail.com |
|---|---|
| State | New |
| Headers | show |
| Series | [FFmpeg-devel,1/2] doc/utils/eval: clarify meaning of random* seed value | expand |
| Context | Check | Description |
|---|---|---|
| yinshiyou/make_loongarch64 | success | Make finished |
| yinshiyou/make_fate_loongarch64 | success | Make fate finished |
| andriy/make_x86 | success | Make finished |
| andriy/make_fate_x86 | success | Make fate finished |
On Wed, Apr 10, 2024 at 03:47:42PM +0200, Stefano Sabatini wrote: > Possible address trac issue: > http://trac.ffmpeg.org/ticket/10763 Some of the things in this ticket are specific to the buggy LCG we no longer use > --- > doc/utils.texi | 12 ++++++++++++ > 1 file changed, 12 insertions(+) sounds ok thx [...]
On date Thursday 2024-04-11 03:50:46 +0200, Michael Niedermayer wrote: > On Wed, Apr 10, 2024 at 03:47:42PM +0200, Stefano Sabatini wrote: > > Possible address trac issue: > > > http://trac.ffmpeg.org/ticket/10763 > > Some of the things in this ticket are specific to the buggy LCG > we no longer use > > > > --- > > doc/utils.texi | 12 ++++++++++++ > > 1 file changed, 12 insertions(+) > > sounds ok > > thx Applied, thanks.
diff --git a/doc/utils.texi b/doc/utils.texi index 76e704fc3c..edf3ae24b0 100644 --- a/doc/utils.texi +++ b/doc/utils.texi @@ -944,11 +944,23 @@ Return a pseudo random value between 0.0 and 1.0. @var{idx} is the index of the internal variable which will be used to save the seed/state. +To initialize the seed, you need to store the seed value as a 64-bit +unsigned integer in the internal variable with index @var{idx}. + +For example, to store the value @code{42} in the internal +variable with index @code{1} and print a few random values: +@example +st(0,42); print(random(0)); print(random(0)); print(random(0)) +@end example + @item randomi(idx, min, max) Return a pseudo random value in the interval between @var{min} and @var{max}. @var{idx} is the index of the internal variable which will be used to save the seed/state. +To initialize the seed, you need to store the seed value as a 64-bit +unsigned integer in the internal variable with index @var{idx}. + @item root(expr, max) Find an input value for which the function represented by @var{expr} with argument @var{ld(0)} is 0 in the interval 0..@var{max}.