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[media] ov7670: implement VIDIOC_ENUM_FRAMEINTERVALS

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Inquiring minds (and gstreamer) want to know.

Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Daniel Drake <dsd@laptop.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Jonathan Corbet 2010-09-24 14:17:29 -03:00 committed by Mauro Carvalho Chehab
parent df2b9b0f9c
commit e99dfcf7f6
1 changed files with 19 additions and 4 deletions
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23
drivers/media/video/ov7670.c
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@ -887,15 +887,29 @@ static int ov7670_s_parm(struct v4l2_subdev *sd, struct v4l2_streamparm *parms)
}
/*
* Frame intervals. Since frame rates are controlled with the clock
* divider, we can only do 30/n for integer n values. So no continuous
* or stepwise options. Here we just pick a handful of logical values.
*/
static int ov7670_frame_rates[] = { 30, 15, 10, 5, 1 };
static int ov7670_enum_frameintervals(struct v4l2_subdev *sd,
struct v4l2_frmivalenum *interval)
{
if (interval->index >= ARRAY_SIZE(ov7670_frame_rates))
return -EINVAL;
interval->type = V4L2_FRMIVAL_TYPE_DISCRETE;
interval->discrete.numerator = 1;
interval->discrete.denominator = ov7670_frame_rates[interval->index];
return 0;
}
/*
* Code for dealing with controls.
*/
static int ov7670_store_cmatrix(struct v4l2_subdev *sd,
int matrix[CMATRIX_LEN])
{
@ -1438,6 +1452,7 @@ static const struct v4l2_subdev_video_ops ov7670_video_ops = {
.s_mbus_fmt = ov7670_s_mbus_fmt,
.s_parm = ov7670_s_parm,
.g_parm = ov7670_g_parm,
.enum_frameintervals = ov7670_enum_frameintervals,
};
static const struct v4l2_subdev_ops ov7670_ops = {