[Gstreamer-openmax] How to port gst-openmax

[Clark, Rob]

On Tue, Dec 14, 2010 at 12:52 AM, Kuo. Bard (GSM)
<Bard_Kuo at compalcomm.com> wrote:
>
> Thanks for reply, Clark and Felipe,
>
> I was confused when I study gst-openmax at the beginning. Now I know how it operate probably.
>
> If there were some flowchart or documents, it may helps me get a handle on gst-openmax faster.


this might help:  http://omapedia.org/wiki/Gstreamer_overview

BR,
-R

>
> Regarding OpenMax components setting, if there are some specific configure needed , where should I add in ? or just before setting omx states to excuting ?
>
> Thanks,
> Bard
> -----Original Message-----
> From: Felipe Contreras [mailto:felipe.contreras at nokia.com]
> Sent: Tuesday, December 14, 2010 12:50 AM
> To: Kuo. Bard (GSM); gstreamer-openmax at lists.sourceforge.net
> Subject: Re: [Gstreamer-openmax] How to port gst-openmax
>
> Bard_Kuo at Compalcomm.com wrote:
> > How to port gst-openmax ?
>
> I'm not sure what you mean. In theory if your OpenMAX IL implementation is
> compliant, gst-openmax should not need any changes.
>
> > Is there some document describing how to use gst-openmax ?
>
> Not really, but it should be like any other GStreamer elements.
>
> A typical example pipeline would be:
>
> gst-launch filesrc location=test.avi ! avidemux ! omx_mpeg4dec ! xvimagesink
>
> However, you need to configure your library-name and component-name, an example
> for Bellagio is:
>
> omx_mpeg4dec,
>  type=GstOmxMpeg4Dec,
>  library-name=libomxil-bellagio.so.0,
>  component-name=OMX.st.video_decoder.mpeg4,
>  sink="video/mpeg, mpegversion=(int)4, systemstream=false, " VIDEO_SIZE_RATE ";" \
>      "video/x-divx, divxversion=(int)[4,5], " VIDEO_SIZE_RATE ";" \
>      "video/x-xvid, " VIDEO_SIZE_RATE ";" \
>      "video/x-3ivx, " VIDEO_SIZE_RATE ";",
>  src=RAW_VIDEO_CAPS,
>  rank=256;
>
> > How the process going in this plugin like flowchart, and how does it access OpenMax ?
> > I am confused between two architectures.
>
> I don't understand your question. gst-openmax simply maps GStreamer flow to
> OpenMAX IL. You can check the code in gstomx_base_filter.c and gstomx_util.c.
>
> Cheers.
>
> --
> Felipe Contreras
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