Hi Hans, On Thu, 2019-01-31 at 14:36 +0100, Hans Verkuil wrote: [...] > > Our YUV32 fourcc is defined as follows: > > https://hverkuil.home.xs4all.nl/spec/uapi/v4l/pixfmt-packed-yuv.html > > As far as I see the format that the TPG generates is according to the V4L2 spec. > > Philipp, can you check the YUV32 format that the imx-pxp driver uses? > Is that according to our spec? > > At some point we probably want to add a VUY32 format which is what Weston > expects, but we certainly cannot change what the TPG generates for YUV32 > since that is correct. I hadn't noticed as YUV32 doesn't show up in GStreamer, but testing with v4l2-ctl, it seems to be incorrect. This script: #!/bin/sh function check() { PATTERN="$1" NAME="$2" echo -ne "${NAME}:\t" v4l2-ctl \ --set-fmt-video-out=width=8,height=8,pixelformat=RGBP \ --set-fmt-video=width=8,height=8,pixelformat=YUV4 \ --stream-count 1 \ --stream-poll \ --stream-out-pattern "${PATTERN}" \ --stream-out-mmap 3 \ --stream-mmap 3 \ --stream-to - 2>/dev/null | hexdump -v -n4 -e '/1 "%02x "' echo } check 6 "100% white" check 7 "100% red" check 9 "100% blue" results in the following output: 100% white: 80 80 ea ff 100% red: f0 66 3e ff 100% blue: 74 f0 23 ff That looks like 32-bit VUYA 8-8-8-8. regards Philipp
