[Cin] Checked in tweaked patches from Andrew - EXR, PNG, and TIFF

[Andrew Randrianasulu]

В сообщении от Saturday 21 March 2020 03:39:18 Phyllis Smith написал(а):
> Andrew, the latest GIT checkin fixes the crash and provides a warning as
> you suggested.  It works on the latest 2.4.1 version as there were some
> code improvements over the 2.2.1.  Try it now.

Seems to work (tried to launch just-compiled Cin without waiting for 
opencv build to finish ...)

Still, at 5am I have this brilliant idea about adding nasm to thirdparty/ directory :}
of course, real fun will be convincing both x264/x265 and libdav1d (and may be even ffmpeg?) 
to use it. I'm not sure if just altering PATH will be enough.

At least x264 seems to look for $AS, so it not hardcoded there?
AS="${AS-nasm}"

ffmpeg have this config option:

--x86asmexe=EXE          use nasm-compatible assembler EXE [$x86asmexe_default]

and x265 uses something from Cmake.

Still, considering list of distros having nasm 2.10 (!) ..... may be it really worth trying
(from NASM_levels.txt attached to BT390)

> 
> > > > Also, minor bug:
> > > >
> > > > If I render OpenEXR sequence, load it, play it,
> > > > and then delete main image files but NOT index *.exrs
> > > >  - and try to load file from "recent files" sub-menu in main menu - Cin
> > > > will terminate
> > > >
> > > > Easily reproduced here.  GG says OpenExr is doing a "throw" and
> > Cinelerra
> > > normally does not "catch". This would be the very first "catch" in
> > > Cinelerra if it would be added and that is not the way gg wants to go
> > > unless we absolutely have to. This requires the error handling
> > > characteristics of the C++ runtime library.
> > > If you do that same thing with a TIFF sequence, it passes the error
> > > correctly back to Cinelerra to field instead of crash.
> > >
> >
> > H, sorry for such suggestion without patch - but can't be OpenEXR sequence
> > file  validated before passing it into library?
> >
> > Of course, on multiproces/user system  user may delete files right after
> > they passes test of existence ....
> >
> > May be just document it? :}
> >
> > --
> > Cin mailing list
> > Cin at lists.cinelerra-gg.org
> > https://lists.cinelerra-gg.org/mailman/listinfo/cin
> >
>