Enforce range limits on periods and period_size.

2 files changed, 5 insertions, 4 deletions

diff --git a/Alc/ALc.c b/Alc/ALc.c
index 35c5607d..05c24bd2 100644
--- a/Alc/ALc.c
+++ b/Alc/ALc.c
@@ -2583,10 +2583,10 @@ ALC_API ALCdevice* ALC_APIENTRY alcOpenDevice(const ALCchar *deviceName)
     }
 
     ConfigValueUInt(NULL, "periods", &device->NumUpdates);
-    if(device->NumUpdates < 2) device->NumUpdates = 4;
+    device->NumUpdates = clampu(device->NumUpdates, 2, 16);
 
     ConfigValueUInt(NULL, "period_size", &device->UpdateSize);
-    if(device->UpdateSize == 0) device->UpdateSize = 1024;
+    device->UpdateSize = clampu(device->UpdateSize, 64, 8192);
 
     ConfigValueUInt(NULL, "sources", &device->MaxNoOfSources);
     if(device->MaxNoOfSources == 0) device->MaxNoOfSources = 256;
diff --git a/alsoftrc.sample b/alsoftrc.sample
index f18860a5..93a48232 100644
--- a/alsoftrc.sample
+++ b/alsoftrc.sample
@@ -72,13 +72,14 @@
 
 ## period_size:
 #  Sets the update period size, in frames. This is the number of frames needed
-#  for each mixing update.
+#  for each mixing update. Acceptable values range between 64 and 8192.
 #period_size = 1024
 
 ## periods:
 #  Sets the number of update periods. Higher values create a larger mix ahead,
 #  which helps protect against skips when the CPU is under load, but increases
-#  the delay between a sound getting mixed and being heard.
+#  the delay between a sound getting mixed and being heard. Acceptable values
+#  range between 2 and 16.
 #periods = 4
 
 ## sources: