ChangeSet 1.808.2.8, 2002/10/21 23:30:44-07:00, [EMAIL PROTECTED]
[PATCH] drivers/usb/media/vicam.c: simplify vicam_read
> The following patch removes the old framebuf_size and framebuf_read_start
> values from the cam structure and simplifes the read function. It also
> moves the needs dummy read check into the read_frame function. cp and dd
> should both still work.
This is in addition to the previous patch. It should allow any programs
that read entire frames to receive a new frame with each successive read.
Programs that read less than the entire frame will read until they reach
the end of the frame. They will then read 0 bytes (signifying EOF). The
next read will start the next frame.
diff -Nru a/drivers/usb/media/vicam.c b/drivers/usb/media/vicam.c
--- a/drivers/usb/media/vicam.c Mon Oct 28 13:55:30 2002
+++ b/drivers/usb/media/vicam.c Mon Oct 28 13:55:30 2002
@@ -1004,6 +1004,10 @@
*ppos += count;
}
+ if (count == VICAM_MAX_FRAME_SIZE) {
+ *ppos = 0;
+ }
+
up(&cam->busy_lock);
return count;
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