Reviewed-by: Niklas Söderlund <niklas.soderlund+rene...@ragnatech.se>
On 2016-02-29 11:16:40 +0100, Hans Verkuil wrote:
> From: Hans Verkuil <hans.verk...@cisco.com>
>
> If cropcap is implemented, then call it first to fill in the pixel
> aspect ratio. Don't return if cropcap returns ENOTTY or ENOIOCTLCMD,
> in that case just assume a 1:1 pixel aspect ratio.
>
> After cropcap was called, then overwrite bounds and defrect with the
> g_selection result because the g_selection() result always has priority
> over anything that vidioc_cropcap returns.
>
> Signed-off-by: Hans Verkuil <hans.verk...@cisco.com>
> ---
> drivers/media/v4l2-core/v4l2-ioctl.c | 35 +++++++++++++++++++++++++++--------
> 1 file changed, 27 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c
> b/drivers/media/v4l2-core/v4l2-ioctl.c
> index 67dbb03..a3db569 100644
> --- a/drivers/media/v4l2-core/v4l2-ioctl.c
> +++ b/drivers/media/v4l2-core/v4l2-ioctl.c
> @@ -2158,11 +2158,37 @@ static int v4l_cropcap(const struct v4l2_ioctl_ops
> *ops,
> {
> struct v4l2_cropcap *p = arg;
> struct v4l2_selection s = { .type = p->type };
> - int ret;
> + int ret = -ENOTTY;
>
> if (ops->vidioc_g_selection == NULL)
> return ops->vidioc_cropcap(file, fh, p);
>
> + /*
> + * Let cropcap fill in the pixelaspect if cropcap is available.
> + * There is still no other way of obtaining this information.
> + */
> + if (ops->vidioc_cropcap) {
> + ret = ops->vidioc_cropcap(file, fh, p);
> +
> + /*
> + * If cropcap reports that it isn't implemented,
> + * then just keep going.
> + */
> + if (ret && ret != -ENOTTY && ret != -ENOIOCTLCMD)
> + return ret;
> + }
> +
> + if (ret) {
> + /*
> + * cropcap wasn't implemented, so assume a 1:1 pixel
> + * aspect ratio, otherwise keep what cropcap gave us.
> + */
> + p->pixelaspect.numerator = 1;
> + p->pixelaspect.denominator = 1;
> + }
> +
> + /* Use g_selection() to fill in the bounds and defrect rectangles */
> +
> /* obtaining bounds */
> if (V4L2_TYPE_IS_OUTPUT(p->type))
> s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS;
> @@ -2185,13 +2211,6 @@ static int v4l_cropcap(const struct v4l2_ioctl_ops
> *ops,
> return ret;
> p->defrect = s.r;
>
> - /* setting trivial pixelaspect */
> - p->pixelaspect.numerator = 1;
> - p->pixelaspect.denominator = 1;
> -
> - if (ops->vidioc_cropcap)
> - return ops->vidioc_cropcap(file, fh, p);
> -
> return 0;
> }
>
> --
> 2.7.0
>
--
Regards,
Niklas Söderlund
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