I was having trouble capturing raw video from GStreamer; turns out that I
now need VIDIOC_TRY_FMT to fill in sizeimage and bytesperline to make it work.
Signed-off-by: Simon Farnsworth <simon.farnsworth@xxxxxxxxxxxx>
---
I'm leaving ONELAN on Friday, so this is a drive-by patch being sent for the
benefit of anyone else trying to use raw capture from a cx18 card. If it's
not suitable for applying as-is, please feel free to just leave it in the
archives so that someone else hitting the same problem can find my fix.
drivers/media/pci/cx18/cx18-ioctl.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/drivers/media/pci/cx18/cx18-ioctl.c b/drivers/media/pci/cx18/cx18-ioctl.c
index 55525af..1c9924a 100644
--- a/drivers/media/pci/cx18/cx18-ioctl.c
+++ b/drivers/media/pci/cx18/cx18-ioctl.c
@@ -234,6 +234,13 @@ static int cx18_try_fmt_vid_cap(struct file *file, void *fh,
fmt->fmt.pix.width = w;
fmt->fmt.pix.height = h;
+ if (fmt->fmt.pix.pixelformat == V4L2_PIX_FMT_HM12) {
+ fmt->fmt.pix.sizeimage = h * 720 * 3 / 2;
+ fmt->fmt.pix.bytesperline = 720; /* First plane */
+ } else {
+ fmt->fmt.pix.sizeimage = h * 720 * 2;
+ fmt->fmt.pix.bytesperline = 1440; /* Packed */
+ }
return 0;
}
--
2.1.0
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