Prevents setting of ALSA controls out-of-range

Prevents setting of ALSA control values out-of-range
for INTEGER type controls.

Change-Id: I7f1ef24b50022df844f6916489e0f45680de6126
Signed-off-by: Jonathan Aillet <jonathan.aillet@iot.bzh>

1 files changed, 14 insertions, 0 deletions

diff --git a/plugins/alsa/alsa-core-ctl.c b/plugins/alsa/alsa-core-ctl.c
index 020c13c..e747090 100644
--- a/plugins/alsa/alsa-core-ctl.c
+++ b/plugins/alsa/alsa-core-ctl.c
@@ -232,6 +232,7 @@ PUBLIC int CtlElemIdSetLong(SoftMixerT *mixer, AlsaSndCtlT *sndcard, snd_ctl_ele
     snd_ctl_elem_info_t *elemInfo;
     const char* name;
     int error, numid;
+    long min, max;
 
     snd_ctl_elem_info_alloca(&elemInfo);
     snd_ctl_elem_info_set_id(elemInfo, elemId);
@@ -247,6 +248,19 @@ PUBLIC int CtlElemIdSetLong(SoftMixerT *mixer, AlsaSndCtlT *sndcard, snd_ctl_ele
     error = snd_ctl_elem_read(sndcard->ctl, elemData);
     if (error) goto OnErrorExit;
 
+    switch(snd_ctl_elem_info_get_type(elemInfo)) {
+        case SND_CTL_ELEM_TYPE_INTEGER:
+            min = snd_ctl_elem_info_get_min(elemInfo);
+            max = snd_ctl_elem_info_get_max(elemInfo);
+
+            value = (value < min) ? min : value;
+            value = (value > max) ? max : value;
+            break;
+
+        default:
+            break;
+    }
+
     for (int index = 0; index < count; index++) {
         snd_ctl_elem_value_set_integer(elemData, index, value);
     }