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v4l2_test: reset rotate to ROTATE_NONE on application launch 

Start the application with a well known rotation value that works with
all the resolutions. Otherwise the rotation value is unknown because it
could have been changed in a previous run of the application.

Also in the kernel driver support was added to report EINVAL to
user-space in case the requested rotation is not supported. We use that
to not return from the 'v4l2_rotate' function without enabling again
the overlay preview.

https://jira.digi.com/browse/DEL-1068
https://jira.digi.com/browse/DEL-1205

Signed-off-by: Javier Viguera <javier.viguera@digi.com>
(cherry picked from commit 2f7547a1b810683b813b708ba67e53ba156a9337)
This commit is contained in:
Javier Viguera 2014-10-23 18:09:46 +02:00
parent 45de4d6943
commit bbb2758a79
3 changed files with 14 additions and 8 deletions
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18
meta-digi-dey/recipes-digi/dey-examples/files/v4l2_test/v4l2_common.c
View File

@ -714,9 +714,14 @@ int v4l2_get_control(int fd, int id, int *value)
return retval;
}
int v4l2_rotate(int fd, int rotate)
int v4l2_set_rotate(int fd, int rotate)
{
/* This is not supported by V4L2, it's done by the IPUv3 driver */
return v4l2_set_control(fd, V4L2_CID_MXC_VF_ROT, rotate);
}
int v4l2_rotate(int fd, int rotate)
{
int retval;
/* Stop overlay */
@ -725,15 +730,12 @@ int v4l2_rotate(int fd, int rotate)
return retval;
/* Set new rotation value */
retval = v4l2_set_control(fd, V4L2_CID_MXC_VF_ROT, rotate);
if (retval < 0)
return retval;
/* Start overlay */
retval = v4l2_overlay_control(fd, 1);
if (retval < 1)
retval = v4l2_set_rotate(fd, rotate);
if (retval < 0 && errno != EINVAL)
return retval;
return retval;
/* Start overlay */
return v4l2_overlay_control(fd, 1);
}
int v4l2_set_brightness(int fd, int percentage)

1
meta-digi-dey/recipes-digi/dey-examples/files/v4l2_test/v4l2_defs.h
View File

@ -159,6 +159,7 @@ int v4l2_reset_cropping_rectangle(int fd);
int v4l2_fb_blank(int fd);
int v4l2_fb_unblank(int fd);
int v4l2_zoom(int fd, int zoom);
int v4l2_set_rotate(int fd, int rotate);
int v4l2_rotate(int fd, int rotate);
int v4l2_crop_input(int fd, struct v4l2_rect *crop_rectangle);
int v4l2_get_cropping_limits(int fd, struct v4l2_rect *limits);

3
meta-digi-dey/recipes-digi/dey-examples/files/v4l2_test/v4l2_preview_test.c
View File

@ -99,6 +99,9 @@ static void *v4l2_camera_thread(void *pargs)
/* Restore default cropping - no zoom */
v4l2_reset_cropping_rectangle(args->fd_in);
/* Reset rotation to ROTATE_NONE */
v4l2_set_rotate(args->fd_in, 0);
/* Set size in overlay */
v4l2_set_format_overlay(args->fd_in,
args->options.top, args->options.left,