Re: soc-camera: Benefits of soc-camera interface over specific char drivers that use Gstreamer lib

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Hi Guennadi,

On Wednesday 16 February 2011 14:49:51 Guennadi Liakhovetski wrote:
> On Wed, 16 Feb 2011, Laurent Pinchart wrote:
> > On Wednesday 16 February 2011 06:57:11 Bhupesh SHARMA wrote:
> > > Hi Guennadi,
> > > 
> > > As I mentioned in one of my previous mails , we are developing a Camera
> > > Host and Sensor driver for our ST specific SoC and considering using
> > > the soc-camera framework for the same. One of our open-source
> > > customers has raised a interesting case though:
> > > 
> > > It seems they have an existing solution (for another SoC) in which they
> > > do not use V4L2 framework and instead use the Gstreamer with
> > > framebuffer. They specifically wish us to implement a solution which
> > > is compatible with ANDROID applications.
> > > 
> > > Could you please help us in deciding which approach is preferable in
> > > terms of performance, maintenance and ease-of-design.
> > 
> > That's a difficult question that can't be answered without more details
> > about your SoC. Could you share some documentation, such as a high-level
> > block diagram of the video-related blocks in the SoC ?
> 
> Laurent, IIUC, the choice above referred not to soc-camera vs. plain v4l2,
> but to v4l2 vs. original android-style video character device, which
> doesn't seem so difficult to me;)

I assume that the Android video character device uses a proprietary API with 
an OMX layer on top of it.

I obviously think V4L2 is a better option than any proprietary 
kernel/userspace interface. This being said, the complexity of the hardware 
sometimes leads people to believe that a custom API would be better (or at 
least easier to implement). I asked for more information about the hardware to 
get a better picture on this.

-- 
Regards,

Laurent Pinchart
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