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

[Martin Vignali]

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
>

Thanks.

With this patch, i not enable compression support in tile (i will make it
sooner, in another patch).
So PIZ Tile, should write an error message like that ("Compression in tile
4 is not implemented....")
(I just test with a little sample).

If it's really crash, this is another issue, can you send me the sample ?

In all cases, i think PIZ decompress have some trouble for now (artefac and
decoding error), need to look more closely...


Martin
Jokyo Images