oss: Add numid check in ctl plugin

Added the check of non-zero numid to optimize the look-up for the
element.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/oss/ctl_oss.c b/oss/ctl_oss.c
index b589f7401ff29524a16e0fd442fdf1f3923bf6db..b8847b1d67d4691ebfd76e9a3d2026cecaccb45e 100644 (file)
--- a/oss/ctl_oss.c
+++ b/oss/ctl_oss.c
@@ -151,7 +151,21 @@ static snd_ctl_ext_key_t oss_find_elem(snd_ctl_ext_t *ext,
 {
        snd_ctl_oss_t *oss = ext->private_data;
        const char *name;
-       unsigned int i, key;
+       unsigned int i, key, numid;
+
+       numid = snd_ctl_elem_id_get_numid(id);
+       if (numid > 0) {
+               numid--;
+               if (numid < oss->num_vol_ctls)
+                       return oss->vol_ctl[numid];
+               numid -= oss->num_vol_ctls;
+               if (oss->exclusive_input) {
+                       if (!numid)
+                               return OSS_KEY_CAPTURE_MUX;
+               } else if (numid < oss->num_rec_items)
+                       return oss->rec_item[numid] |
+                               OSS_KEY_CAPTURE_FLAG;
+       }
 
        name = snd_ctl_elem_id_get_name(id);
        if (! strcmp(name, "Capture Source")) {