[FFmpeg-devel] libavcodec/exr : add support for datawindow who exceed display window

[Martin Vignali]

2016-04-09 6:54 GMT+02:00 Paul B Mahol <onemda at gmail.com>:

> On 4/9/16, Martin Vignali <martin.vignali at gmail.com> wrote:
> > 2016-04-08 22:11 GMT+02:00 Paul B Mahol <onemda at gmail.com>:
> >
> >> On 4/7/16, Martin Vignali <martin.vignali at gmail.com> wrote:
> >> > Hello,
> >> >
> >> > in attach, a patch with some modifications in size/data window
> >> management,
> >> > in order to manage
> >> > negative datawindow/display window, and datawindow who can exceed
> >> > display
> >> > window
> >> >
> >> > Size of the picture is now set from min and max value of the display
> >> window
> >> > (before the patch, xmin, ymin of the display window are ignored (and
> >> assume
> >> > to be 0))
> >> >
> >> > With the previous patch (fix channel detection), official samples
> >> > ./scanline/Blobbies.exr
> >> > can now be correctly decode.
> >> >
> >> >
> >> > DataWindow bigger than display window is a feature of the openExr.
> >> > It can be use in some softwares, (for example to improve blur quality)
> >> > Following the official documentation, for display, we need to use the
> >> > display window only.
> >> >
> >> >
> >> > In this patch, xmin, xmax, ymin, ymax, are now int32_t instead of
> >> uint32_t,
> >> > because these values can be negative. (See officiel sample
> >> ./Displaywindow
> >> >
> >>
> http://download.savannah.nongnu.org/releases/openexr/openexr-images-1.7.0.tar.gz
> >> > )
> >> >
> >> > Comments welcome
> >>
> >> Crashes with:
> >>
> >> openexr-images-1.7.0/DisplayWindow/t03.exr
> >>
> >> Strange, this sample didn't crash for me (Clang, OS 10.9). Decode it's
> > still not good after the patch but it's piz compression.
> > Can you tell me, what configure line, you use ?
>
>
> I still can't reproduce the crash for this sample.
Is it the only sample who crash in openexr-images-1.7.0/DisplayWindow for
you ?

Thanks

Martin
Jokyo Images