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V4L/DVB (4376): Make it possible for run-time calculation of control min/max in pvrusb2

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The internal control implementation in the pvrusb2 driver normally
encodes integer range limits using literal values in a const
structure.  This change adds two function pointers, which if not null
will be called through in order to determine integer min / max
values.

Signed-off-by: Mike Isely <isely@pobox.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
This commit is contained in:
Mike Isely 2006-08-08 09:10:07 -03:00 • committed by Mauro Carvalho Chehab
parent e95a191566
commit 89ebd63fdd
2 changed files with 17 additions and 6 deletions
drivers/media/video/pvrusb2
pvrusb2-ctrl.cpvrusb2-hdw-internal.h

21
drivers/media/video/pvrusb2/pvrusb2-ctrl.c
View file

@ -43,12 +43,17 @@ int pvr2_ctrl_set_mask_value(struct pvr2_ctrl *cptr,int mask,int val)
if (cptr->info->type == pvr2_ctl_bitmask) {
mask &= cptr->info->def.type_bitmask.valid_bits;
} else if (cptr->info->type == pvr2_ctl_int) {
if (val < cptr->info->def.type_int.min_value) {
break;
int lim;
lim = cptr->info->def.type_int.min_value;
if (cptr->info->get_min_value) {
cptr->info->get_min_value(cptr,&lim);
}
if (val > cptr->info->def.type_int.max_value) {
break;
if (val < lim) break;
lim = cptr->info->def.type_int.max_value;
if (cptr->info->get_max_value) {
cptr->info->get_max_value(cptr,&lim);
}
if (val > lim) break;
} else if (cptr->info->type == pvr2_ctl_enum) {
if (val >= cptr->info->def.type_enum.count) {
break;
@ -91,7 +96,9 @@ int pvr2_ctrl_get_max(struct pvr2_ctrl *cptr)
int ret = 0;
if (!cptr) return 0;
LOCK_TAKE(cptr->hdw->big_lock); do {
if (cptr->info->type == pvr2_ctl_int) {
if (cptr->info->get_max_value) {
cptr->info->get_max_value(cptr,&ret);
} else if (cptr->info->type == pvr2_ctl_int) {
ret = cptr->info->def.type_int.max_value;
}
} while(0); LOCK_GIVE(cptr->hdw->big_lock);
@ -105,7 +112,9 @@ int pvr2_ctrl_get_min(struct pvr2_ctrl *cptr)
int ret = 0;
if (!cptr) return 0;
LOCK_TAKE(cptr->hdw->big_lock); do {
if (cptr->info->type == pvr2_ctl_int) {
if (cptr->info->get_min_value) {
cptr->info->get_min_value(cptr,&ret);
} else if (cptr->info->type == pvr2_ctl_int) {
ret = cptr->info->def.type_int.min_value;
}
} while(0); LOCK_GIVE(cptr->hdw->big_lock);

2
drivers/media/video/pvrusb2/pvrusb2-hdw-internal.h
View file

@ -80,6 +80,8 @@ struct pvr2_ctl_info {
/* Control's implementation */
pvr2_ctlf_get_value get_value; /* Get its value */
pvr2_ctlf_get_value get_min_value; /* Get minimum allowed value */
pvr2_ctlf_get_value get_max_value; /* Get maximum allowed value */
pvr2_ctlf_set_value set_value; /* Set its value */
pvr2_ctlf_val_to_sym val_to_sym; /* Custom convert value->symbol */
pvr2_ctlf_sym_to_val sym_to_val; /* Custom convert symbol->value */