On Fri, 17 Apr 2009, Dongsoo, Nathaniel Kim wrote: > Hi Guennadi, > > On Fri, Apr 17, 2009 at 4:00 PM, Guennadi Liakhovetski > <g.liakhovetski@xxxxxx> wrote: > > On Fri, 17 Apr 2009, Dongsoo, Nathaniel Kim wrote: > > > >> 1. make preview device a video output > >> => it makes sense. but codec path also has dedicated DMA to frame buffer. > >> What should we do with that? I have no idea by now. > > > > Add a V4L2_CAP_VIDEO_OVERLAY capability and if the user requests > > V4L2_BUF_TYPE_VIDEO_OVERLAY - configure direct output to framebuffer? > > > > OK that's an idea. Then we can use preview as video output device and > codec device as a capture device with overlay capability. Actually, if I interpret the "Camera interface overview" figure (20-1) correctly, both capture and output channels have the overlay capability, so, you can enable it for both of them and configure the respective one accordingly. Thanks Guennadi --- Guennadi Liakhovetski, Ph.D. Freelance Open-Source Software Developer -- 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
