[FFmpeg-devel] Libavcodec/exr : add support for tile

[Martin Vignali]

2016-04-03 17:38 GMT+02:00 Paul B Mahol <onemda at gmail.com>:

> On 4/3/16, Martin Vignali <martin.vignali at gmail.com> wrote:
> > 2016-04-03 17:12 GMT+02:00 Paul B Mahol <onemda at gmail.com>:
> >
> >> On 4/3/16, Martin Vignali <martin.vignali at gmail.com> wrote:
> >> > Hello,
> >> >
> >> > In attach a patch in order to add support for exr Tile (One Level)
> >> >
> >> > Some samples can be found here : https://we.tl/IC4XTrEJf4
> >> > Theses samples can also be add to ./fate-suite/exr/
> >> > (i will make a fate test soon).
> >> >
> >> > Details of the sample files :
> >> > rgb_tile_half_raw_12x8.exr : uncompress half float file, in tile (only
> >> one
> >> > tile in the file)
> >> > rgb_tile_float_raw_12x8.exr : uncompress float file, in tile (only one
> >> tile
> >> > in the file)
> >> > rgb_tile_float_raw_150x130.exr : uncompress float file, in tile
> >> > (multiple
> >> > tile in the file)
> >> >
> >> > In this patch, compression in tile is not enabled. (i will make new
> >> patchs
> >> > for that after making more tests)
> >> >
> >> > I tried to keep the most code common with the scanline mode (reason
> why,
> >> > scanline code part have had some modifications).
> >> > Tile data are reorganized, to be more like scanline uncompress data.
> >> >
> >> > Pass fate-exr tests.
> >> >
> >> > More information about tile in exr can be found here :
> >> > http://www.openexr.com/TechnicalIntroduction.pdf
> >> >
> >> > Comments welcome.
> >> >
> >> > Martin
> >> > Jokyo Images
> >> >
> >>
> >> Pushed. Note that tile with PIZ compression crashes
>

In tile :
RLE, ZIP1, ZIP16, PXR24 will work fine without modification, because they
don't use s->xdelta (the datawindow width)

PIZ, B44, B44A, use s->xdelta, so now, they will have some trouble for
datawindow bigger than tile size in X.

I will make a patch soon, for this.

Can you send me your PIZ sample who make ffmpeg crash to check  (with
wetransfer or something similar) ?

Thanks by advance

Martin
Jokyo Images