[gst-devel] Is there any guide line for how to enable hw codec in gstreamer media framework?

[Julien Moutte]

Hi,

There are multiple ways to implement hardware accelerated codecs :

1) Make your own video/audio sink element that accepts encoded data
buffers. For example a video sink that would take as input VC1, H.264,
etc...

2) Make a GStreamer element communicating with hardware and using the
hardware to decode input buffers and push output buffers. For example a
VC1 decoder using GPU to do the hard part but still decoding in user
space memory buffers that travel into the pipeline.

3) Make a set of GStreamer elements exchanging "special" buffers
subclassed from GstBuffer that contain additional information about
where the data is being processed in hardware pipeline so that GStreamer
elements can work with it while keeping data in hardware memory space.

So it depends on your hardware constraints and use case.

Best regards,

Julien Moutte,
FLUENDO S.A.

Zhao, Halley wrote:
> 
> 
> Hi all:
> 
> I don’t know how the difference is for gst element between pure software
> codecs and hardware accelerated codecs,
> 
> For example:
> 
> The destination of sw codec always come to an audio sink or video sink,
> but hw accelerated codec may directly rendering to audio device or screen.
> 
> Do we need something special for hw codecs? How should we do for the
> source pad of hw codec?
> 
> (should we development the hw accelerated element like a sink plugin
> without a source pad?)
> 
>  
> 
> Is there any guide line for how to enable hw codec in gstreamer media
> framework?
> 
>  
> 
> Great thanks.
> 
> BR
> 
>  
> 
> 
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