gstreamer with cairo plugin

[Henry (Yu) Song - SISA]

Well

First, we would like to update cairo plugin such that it is up-to-date, and maintained.  Second we like to to use cairo_gl_surface instead of image surface.  As far as I know our cairo-gles backend is the fastest one among all cairo backend.  It is maintained by me and is being actively optimized/bug fixed.

Second, I would like to decode image into GPU memory directly with cairo gl backend as sink, such that we can either play it back much quicker instead of upload to texture and we can add overlay, which may also be in GPU memory, quicker.

We might have other optimization in the process.

Thanks

Henry

________________________________________
From: gstreamer-devel-bounces+hsong=sisa.samsung.com at lists.freedesktop.org [gstreamer-devel-bounces+hsong=sisa.samsung.com at lists.freedesktop.org] on behalf of Sebastian Dröge [sebastian.droege at collabora.co.uk]
Sent: Thursday, January 10, 2013 12:05 PM
To: Discussion of the development of and with GStreamer
Cc: Simon Gibbs - SISA; Danny Bennett - SISA; Guillaume Emont
Subject: Re: gstreamer with cairo plugin

On Do, 2013-01-10 at 18:05 +0000, Henry (Yu) Song - SISA wrote:
> Hi, Tim and Wim:
>
> My name is Henry Song.  I am working with Samsung.
> I'vecreated/optimized a new cairo gl compositor that takes advantages
> of driver MSAA capability.  It is much faster than existing cairo gl
> compositor and is production ready.  Currently it is being upstreamed
> to cairo main stream.  I will be the maintainer for this backend.
>
Hi Henry,

that's great news :) This will be the default for the cairo-gl backend
in the future then?

> I am working with Guillaum Emont and we would like to ask about
> updating thegstreamer cairo backend to take advantage of the new cairo
> GL.  In the process, we would also like to optimize both gstreamer and
> thecairo plugin.  In addition, we are looking into GL/GLES extensions
> that allow easier/faster interaction between gstreamer andother cairo
> applications.

what exactly are you using the cairo plugin for and which parts of it do
you plan to optimize? Note that we recently removed most of the cairo
plugin (everything except cairooverlay) from GStreamer 1.0, because
these elements were basically unmaintained, buggy and there were better
alternatives for most of the elements (in the pango plugin).

What kind of easier/faster interaction between GStreamer and cairo do
you have in mind, what exactly are your use cases?