GPU Compression

[Aaron Boxer]

On Wed, Feb 25, 2015 at 4:38 AM, Julien Isorce <julien.isorce at gmail.com>
wrote:

> For further optimisation,
> with clCreateFromGLTexture2D it is possible to create a cl image2d object
> from a previously created gl texture.
>
> You could use that to feed directly a gl textures that come from the
> glimagesink 's GstGLBufferPool. It avoids the frame round trip to CPU
> memory.
>
> Indeed your decoder will use this downstream pool and writes a cl object
> at each iteration. Then glimagesink can draw the corresponding gl texture.
>
> Similar mechanism can be find in vtdec. For decoders that use EGLImage it
> is a bit different because eglCreateImage is used in libgstgl directly.
>
> It could be useful to have a GstCLVideoDecoder base class that does this
> setup and it could be reused with other compressed formats.
>
> Also I would suggest to have a look at software decoders like jpegdec and
> pngdec. They contain fewer code. Also the bottom page of GstVideoDecoder
> where the doc explain the functions.
>

Thanks so much, Julien.  Right now, I am focusing on encoding. When I get
to the decoder phase, I will look into opencl-opengl
interop as you suggest, and I may have more questions at that time.

Aaron


> Julien
> On 24 Feb 2015 13:42, "Aaron Boxer" <boxerab at gmail.com> wrote:
>
>> Excellent, thanks guys. The link is very helpful, and makes me feel
>> confident that I can stand on the
>> "shoulders of giants" and get my plugin working.
>>
>>
>>
>> On Tue, Feb 24, 2015 at 3:06 AM, Sebastian Dröge <
>> sebastian at centricular.com> wrote:
>>
>>> On Mo, 2015-02-23 at 10:12 -0500, Aaron Boxer wrote:
>>> > Hello!
>>> >
>>> > I am working on a jpeg 2000 video compression library written in
>>> OpenCL,
>>> > and I'm looking into gstreamer as way of streaming the compressed
>>> video.
>>> >
>>> > I have never used gstreamer before, but I understand that it supports
>>> GPU
>>> > codecs.
>>> > Any advice or comments on how to do this with gstreamer would be
>>> greatly
>>> > appreciated.
>>>
>>> You could take a look at the code of many of the existing non-software
>>> based codec elements, e.g. gst-omx, v4l2viddec, androidmedia,
>>> gstreamer-vaapi. For a high level view of what features are available to
>>> make integration of hardware codecs easier you can also take a look
>>> here:
>>>
>>> https://coaxion.net/blog/2013/10/the-never-ending-story-gstreamer-and-hardware-integration/
>>>
>>> --
>>> Sebastian Dröge, Centricular Ltd · http://www.centricular.com
>>>
>>> _______________________________________________
>>> gstreamer-devel mailing list
>>> gstreamer-devel at lists.freedesktop.org
>>> http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel
>>>
>>>
>>
>> _______________________________________________
>> gstreamer-devel mailing list
>> gstreamer-devel at lists.freedesktop.org
>> http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel
>>
>>
> _______________________________________________
> gstreamer-devel mailing list
> gstreamer-devel at lists.freedesktop.org
> http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.freedesktop.org/archives/gstreamer-devel/attachments/20150225/d4d05781/attachment-0001.html>