Re: [Libjpeg-turbo-devel] Parallel Decode

[Giles P. <gil...@te...>]

Hi Peter,

There is a kind of a hint in the line:

>In this paper, we *propose* a task-parallel programming extension for the
JPEG decoder of the libjpeg-turbo library.

It does not appear that they have actually made available any source code
that would do the creation of multiple decompressor objects/image splitting.



On Tue, Jun 21, 2016 at 4:02 PM, Peter SUCIU <pet...@gm...> wrote:

> Hi all!
>
> According to http://www.sersc.org/journals/IJMUE/vol7_no2_2012/10.pdf
> there is a way to parallelise decoding of images with jpeglib.
>
> I am correctly decoding an image from stored bytes in ram via jpeg_mem_src
> in my decompressor, however I am at a loss on how to proceed in
> implementation as I can't identify how to split up the image for decoding,
> mainly this part of the algorithm described in the pdf:
>
> *foreach *MTU_row *in *ImageSlice(id) *do*
> {
>    *inverseDCT *(MTU_row );
>    *upsampling *(MTU_row );
>    *colorConversion *(MTU_row );
> }
>
> is there a way to split up an image and feed it to a bunch of decompressor
> objects of libjpeg? what methods need i be looking at to achieve this?
>
>
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