From 2ccd818b55c6623a06b217f55eb23dd8ce4c53c4 Mon Sep 17 00:00:00 2001
From: kevin <kpl@larke.org>
Date: Sun, 31 Mar 2013 22:13:07 -0700
Subject: [PATCH] cmApBuf.h/c: Limit the meter update parameter (meterMs) to
 the range 10-1000.

---
 cmApBuf.c | 7 ++++++-
 cmApBuf.h | 5 ++++-
 2 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/cmApBuf.c b/cmApBuf.c
index cd4c449..ef3abf2 100644
--- a/cmApBuf.c
+++ b/cmApBuf.c
@@ -215,7 +215,7 @@ cmAbRC_t cmApBufInitialize( unsigned devCnt, unsigned meterMs )
 
   _cmApBuf.devArray        = cmMemAllocZ( cmApDev, devCnt );
   _cmApBuf.devCnt          = devCnt;
-  _cmApBuf.meterMs         = meterMs;
+  cmApBufSetMeterMs(meterMs);
   return kOkAbRC;
 }
 
@@ -451,6 +451,11 @@ cmAbRC_t cmApBufUpdate(
 unsigned cmApBufMeterMs()
 { return _cmApBuf.meterMs; }
 
+void     cmApBufSetMeterMs( unsigned meterMs )
+{
+  _cmApBuf.meterMs = cmMin(1000,cmMax(10,meterMs));
+}
+
 unsigned cmApBufChannelCount( unsigned devIdx, unsigned flags )
 {
   if( devIdx == cmInvalidIdx )
diff --git a/cmApBuf.h b/cmApBuf.h
index b2e06ca..ec016ce 100644
--- a/cmApBuf.h
+++ b/cmApBuf.h
@@ -46,7 +46,7 @@ extern "C" {
 
   /// Allocate and initialize an audio buffer.
   /// devCnt - count of devices this buffer will handle.
-  /// meterMs - length of the meter buffers in milliseconds
+  /// meterMs - length of the meter buffers in milliseconds (automatically limit to the range:10 to 1000)
   cmAbRC_t cmApBufInitialize( unsigned devCnt, unsigned meterMs );
 
   /// Deallocate and release any resource held by an audio buffer allocated via cmApBufInitialize().
@@ -106,6 +106,9 @@ extern "C" {
 
   /// Return the meter window period as set by cmApBufInitialize()
   unsigned cmApBufMeterMs();
+  
+  // Set the meter update period. THis function limits the value to between 10 and 1000.
+  void     cmApBufSetMeterMs( unsigned meterMs );
 
   /// Returns the channel count set via cmApBufSetup().
   unsigned cmApBufChannelCount( unsigned devIdx, unsigned flags );