Hi, From: Mauro Carvalho Chehab [mailto:mche...@redhat.com] > Em 10-12-2010 01:32, 박정태 escreveu: > > Hi, Kamil > > > > What do you think modification of codec class control ID for MFC as > > following. > > 1. Define the CID base for MFC > > 2. Separate decode & encode controls > > 3. Separate common & codec-specific controls > > > >> Add fourcc values for compressed video stream formats and > >> V4L2_CTRL_CLASS_CODEC. Also adds controls used by MFC 5.1 driver. > > This is a very bad idea. As much as possible, controls should be > generic enough > to avoid us to have the same control provided by two different > hardware. > > The only case were a control should be per-driver, is when the control > is for some > very specific implementation detail on that hardware, that it is > unlikely that other > chipsets will implement it at the same way. >
I agree with Mauro. The point of having a general class for codecs (V4L2_CID_CODEC_CLASS) is reusing same controls for different hardware. I think that most controls, maybe all, could be used by other hw codecs. > (snip) Best regards, -- Kamil Debski Linux Platform Group Samsung Poland R&D Center -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
