* Video4Linux Interface
**************************************************************************/
-/*
- * si470x_v4l2_queryctrl - query control
- */
-static struct v4l2_queryctrl si470x_v4l2_queryctrl[] = {
- {
- .id = V4L2_CID_AUDIO_VOLUME,
- .type = V4L2_CTRL_TYPE_INTEGER,
- .name = "Volume",
- .minimum = 0,
- .maximum = 15,
- .step = 1,
- .default_value = 15,
- },
- {
- .id = V4L2_CID_AUDIO_MUTE,
- .type = V4L2_CTRL_TYPE_BOOLEAN,
- .name = "Mute",
- .minimum = 0,
- .maximum = 1,
- .step = 1,
- .default_value = 1,
- },
-};
-
-
/*
* si470x_vidioc_querycap - query device capabilities
*/
static int si470x_vidioc_queryctrl(struct file *file, void *priv,
struct v4l2_queryctrl *qc)
{
- unsigned char i = 0;
int retval = -EINVAL;
/* abort if qc->id is below V4L2_CID_BASE */
goto done;
/* search video control */
- for (i = 0; i < ARRAY_SIZE(si470x_v4l2_queryctrl); i++) {
- if (qc->id == si470x_v4l2_queryctrl[i].id) {
- memcpy(qc, &(si470x_v4l2_queryctrl[i]), sizeof(*qc));
- retval = 0; /* found */
- break;
- }
+ switch (qc->id) {
+ case V4L2_CID_AUDIO_VOLUME:
+ return v4l2_ctrl_query_fill(qc, 0, 15, 1, 15);
+ case V4L2_CID_AUDIO_MUTE:
+ return v4l2_ctrl_query_fill(qc, 0, 1, 1, 1);
}
/* disable unsupported base controls */