On Thu, 5 Mar 2009, Robert Jarzmik wrote: > Guennadi Liakhovetski <g.liakhovetski@xxxxxx> writes: > > > This is not a review yet - just an explanation why I was suggesting to > > adjust height and width - you say yourself, that YUV422P (I think, this is > > wat you meant, not just YUV422) requires planes to immediately follow one > > another. But you have to align them on 8 byte boundary for DMA, so, you > > violate the standard, right? If so, I would rather suggest to adjust width > > and height for planar formats to comply to the standard. Or have I > > misunderstood you? > No, you understand perfectly. > > And now, what do we do : > - adjust height ? > - adjust height ? > - adjust both ? > > I couldn't decide which one, any hint ? Shame the planes have to be contiguous. Software like ffmpeg doesn't require this and could handle planes with gaps between them without trouble. Plans aligned on 8 bytes boundaries would probably be faster in fact. Be better if v4l2_buffer gave us offsets for each plane. If you must adjust, probably better to adjust both. -- 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
