Hi Guennadi, On 10 November 2014 19:46, Guennadi Liakhovetski <g.liakhovetski@xxxxxx> wrote: > Hi Bin, > > On Sat, 8 Nov 2014, Bin Chen wrote: > >> Hi Everyone, >> >> I need suggestions with regard to adding controls to query camera read >> only parameters (e.g maxZoom/maxExposureCompensation) as needed by >> Android Camera API[1]. > > I'm not sure all Android HAL metadata tags should be 1-to-1 implemented in > V4L2. Yes, we won't need 1-1 mapping and I'm just trying to identify the gaps and will add only those that are make sense. > Some of them can be derived from existing information, some are even > more relevant to the HAL, then to the camera (kernel driver). We can do it in both places and the boundary is kind of blur, at least for me:). Any guideline to follow? Putting them in driver maybe reasonable in the sense that all hardware related information are put together in one place - the driver. V4L2_CID_PIXEL_RATE is an example in V4l2 to provide such read-only information. -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
