Hi Michael, On Tuesday 14 June 2011 17:50:13 Michael Jones wrote: > In the V4L2 spec, the description for v4l2_buffer.index says "This field > is only used for memory mapping I/O..." > > However, in v4l-utils/contrib/capture-example.c, even user-pointer > buffers are indeed given a buf.index before being passed to VIDIOC_QBUF. > And at least in the OMAP ISP driver, this information is relied upon in > QBUF regardless of V4L2_MEMORY_MMAP/USERPTR. videobuf-core also uses > v4l2_buffer->index even if b->memory == V4L2_MEMORY_USERPTR. > > Is this a bug in the OMAP driver and videobuf-core, and an unnecessary > assignment in capture-example? Or is the V4L2 spec out of touch/ out of > date? The spec is out of date. The index field is used for userptr buffers as well. -- Regards, Laurent Pinchart -- 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
