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path: root/drivers/media/video/pvrusb2/pvrusb2-hdw.c
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Diffstat (limited to 'drivers/media/video/pvrusb2/pvrusb2-hdw.c')
-rw-r--r--drivers/media/video/pvrusb2/pvrusb2-hdw.c26
1 files changed, 25 insertions, 1 deletions
diff --git a/drivers/media/video/pvrusb2/pvrusb2-hdw.c b/drivers/media/video/pvrusb2/pvrusb2-hdw.c
index 7d46bc10179..f461830c64c 100644
--- a/drivers/media/video/pvrusb2/pvrusb2-hdw.c
+++ b/drivers/media/video/pvrusb2/pvrusb2-hdw.c
@@ -1988,7 +1988,7 @@ struct pvr2_ctrl *pvr2_hdw_get_ctrl_by_id(struct pvr2_hdw *hdw,
}
-/* Given an ID, retrieve the control structure associated with it. */
+/* Given a V4L ID, retrieve the control structure associated with it. */
struct pvr2_ctrl *pvr2_hdw_get_ctrl_v4l(struct pvr2_hdw *hdw,unsigned int ctl_id)
{
struct pvr2_ctrl *cptr;
@@ -2005,6 +2005,30 @@ struct pvr2_ctrl *pvr2_hdw_get_ctrl_v4l(struct pvr2_hdw *hdw,unsigned int ctl_id
}
+/* Given a V4L ID for its immediate predecessor, retrieve the control
+ structure associated with it. */
+struct pvr2_ctrl *pvr2_hdw_get_ctrl_nextv4l(struct pvr2_hdw *hdw,
+ unsigned int ctl_id)
+{
+ struct pvr2_ctrl *cptr,*cp2;
+ unsigned int idx;
+ int i;
+
+ /* This could be made a lot more efficient, but for now... */
+ cp2 = 0;
+ for (idx = 0; idx < hdw->control_cnt; idx++) {
+ cptr = hdw->controls + idx;
+ i = cptr->info->v4l_id;
+ if (!i) continue;
+ if (i <= ctl_id) continue;
+ if (cp2 && (cp2->info->v4l_id < i)) continue;
+ cp2 = cptr;
+ }
+ return cp2;
+ return 0;
+}
+
+
static const char *get_ctrl_typename(enum pvr2_ctl_type tp)
{
switch (tp) {