Hi,
Your findings are very interesting. I also have image corruption when light is
too bright with the s5k4aa sensor. I have a work around but it only works in
640x480 when sub-sampling is enabled, so a better solution would be nice.
I made a patch which almost fixes the pb : when a frame header has the same
frame number as the current frame, just append data to the current frame. This
fixes jerkiness but there is still an image deformation. Could you try this
patch and tell if it works for you?
Greg
----- Message d'origine ----
De : Lukáš Karas <[EMAIL PROTECTED]>
À : m560x-driver-devel <[email protected]>
Envoyé le : Mercredi, 17 Septembre 2008, 3h22mn 14s
Objet : [M560x-driver-devel] possible solution for s5k83a problems with light
Hi all
Is it possible somehow throwout frames from stream?
I identify frame number in frame deliminer.
When I am shining with lamp direct to sensor, some frames are send several
times
(frames with same number)
and image from camera is bugly.
I find repetitive frame number in usb snoop from windows too, when i was
shining to sensor,
but image was greath!
Maybee if we throwout "damage" frames, image will be stable as in windows...
I create small test patch for repetitive frame number.
patch: http://www.karry.wz.cz/download/light_test.patch
screencast: http://www.karry.wz.cz/download/test_screencast.avi
Please read the patch and see screencast, you understand what I wrote.
Is anybody capable create frame drop for test my idea?
Regards Lukas
Index: m5602_v4l2.c
===================================================================
--- m5602_v4l2.c (révision 403)
+++ m5602_v4l2.c (copie de travail)
@@ -121,6 +121,7 @@
}
}
+static int last;
/* Executes when fresh URBs arrive from the bridge */
void m5602_urb_complete(struct urb *urb)
{
@@ -198,6 +199,16 @@
switch (f->state) {
case FRAME_GRABBING:
+
+ if (pos[-4] == last) {
+ memcpy(f->rawdata + f->buf.bytesused,
+ pos, len);
+ f->buf.bytesused += len;
+ break;
+ }
+ last = pos[-4];
+
+
f->buf.bytesused =
cam->sensor->current_fmt.sizeimage;
do_gettimeofday(&f->buf.timestamp);
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