[GEM-dev] Hap video codec support?

[Antonio Roberts]

So I guess it'd have to be built into GEM... I'll add it to the bug tracker
On Jul 24, 2013 5:01 AM, "Max" <abonnements at revolwear.com> wrote:

> i stand corrected: further reading on that page suggests, that there
> exists a simple support to open such files, as well as an "accellerated"
> support, which Gem doesn't have:
>
> Accelerated playback of Hap involves passing S3TC frames to graphics
> hardware using OpenGL. The Hap codec will emit S3TC frames when an
> application indicates it can handle them. This is done using the usual
> QuickTime playback mechanisms and if you are already using QuickTime the
> code overhead to support Hap is fairly low.
>
> The Hap QuickTime codec must be installed.
>
> The steps are
>
>         • Open a movie and examine its video track to confirm it is Hap
>         • Create a QTPixelBufferContext for playback using a list of
> custom pixel-format type constants
>         • Play the movie
>         • When you receive a frame, perform compressed texture upload
> using OpenGL
>         • If the movie is encoded with Hap Q, use a shader when you draw
> the texture
> This example includes reusable code to aid the process. Steps 1. and 2.
> utilise
>
> HapSupport.h
> HapSupport.c
>
> Steps 4. and 5. utilise
>
> HapPixelBufferTexture.h
> HapPixelBufferTexture.m
> ScaledCoCgYToRGBA.vert
> ScaledCoCgYToRGBA.frag
>
> https://github.com/vidvox/hap-quicktime-playback-demo
>
>
> Am 24.07.2013 um 00:15 schrieb Max <abonnements at revolwear.com>:
>
> > since it claims to be a QuickTime codec i guess that it is supported
> since Gem uses QuickTime for file access
> >
> > Am 23.07.2013 um 21:14 schrieb Antonio Roberts <antonio at hellocatfood.com
> >:
> >
> >> Are there any plans for GEM to support the Hap video codec for video
> >> playback? http://vdmx.vidvox.net/blog/hap
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.puredata.info/pipermail/gem-dev/attachments/20130724/635cfcd4/attachment.htm>