From 66704eefcbe132eac0415434340f788808c40302 Mon Sep 17 00:00:00 2001
From: Paul Davis <paul@linuxaudiosystems.com>
Date: Sat, 17 Oct 2015 20:46:58 -0400
Subject: alternative new version of the AppleUtility library

---
 .../AudioUnits/AUPublic/Utility/AUSilentTimeout.h  | 93 ++++++++++++++++++++++
 1 file changed, 93 insertions(+)
 create mode 100644 libs/appleutility/CoreAudio/AudioUnits/AUPublic/Utility/AUSilentTimeout.h

(limited to 'libs/appleutility/CoreAudio/AudioUnits/AUPublic/Utility/AUSilentTimeout.h')

diff --git a/libs/appleutility/CoreAudio/AudioUnits/AUPublic/Utility/AUSilentTimeout.h b/libs/appleutility/CoreAudio/AudioUnits/AUPublic/Utility/AUSilentTimeout.h
new file mode 100644
index 0000000000..9fbd3e1f23
--- /dev/null
+++ b/libs/appleutility/CoreAudio/AudioUnits/AUPublic/Utility/AUSilentTimeout.h
@@ -0,0 +1,93 @@
+/*
+     File: AUSilentTimeout.h
+ Abstract: Part of CoreAudio Utility Classes
+  Version: 1.1
+ 
+ Disclaimer: IMPORTANT:  This Apple software is supplied to you by Apple
+ Inc. ("Apple") in consideration of your agreement to the following
+ terms, and your use, installation, modification or redistribution of
+ this Apple software constitutes acceptance of these terms.  If you do
+ not agree with these terms, please do not use, install, modify or
+ redistribute this Apple software.
+ 
+ In consideration of your agreement to abide by the following terms, and
+ subject to these terms, Apple grants you a personal, non-exclusive
+ license, under Apple's copyrights in this original Apple software (the
+ "Apple Software"), to use, reproduce, modify and redistribute the Apple
+ Software, with or without modifications, in source and/or binary forms;
+ provided that if you redistribute the Apple Software in its entirety and
+ without modifications, you must retain this notice and the following
+ text and disclaimers in all such redistributions of the Apple Software.
+ Neither the name, trademarks, service marks or logos of Apple Inc. may
+ be used to endorse or promote products derived from the Apple Software
+ without specific prior written permission from Apple.  Except as
+ expressly stated in this notice, no other rights or licenses, express or
+ implied, are granted by Apple herein, including but not limited to any
+ patent rights that may be infringed by your derivative works or by other
+ works in which the Apple Software may be incorporated.
+ 
+ The Apple Software is provided by Apple on an "AS IS" basis.  APPLE
+ MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION
+ THE IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS
+ FOR A PARTICULAR PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND
+ OPERATION ALONE OR IN COMBINATION WITH YOUR PRODUCTS.
+ 
+ IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL
+ OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ INTERRUPTION) ARISING IN ANY WAY OUT OF THE USE, REPRODUCTION,
+ MODIFICATION AND/OR DISTRIBUTION OF THE APPLE SOFTWARE, HOWEVER CAUSED
+ AND WHETHER UNDER THEORY OF CONTRACT, TORT (INCLUDING NEGLIGENCE),
+ STRICT LIABILITY OR OTHERWISE, EVEN IF APPLE HAS BEEN ADVISED OF THE
+ POSSIBILITY OF SUCH DAMAGE.
+ 
+ Copyright (C) 2014 Apple Inc. All Rights Reserved.
+ 
+*/
+#ifndef __AUSilentTimeout
+#define __AUSilentTimeout
+
+class AUSilentTimeout
+{
+public:
+	AUSilentTimeout()
+		: 	mTimeoutCounter(0),
+			mResetTimer(true)
+				{};
+
+	void				Process(UInt32 inFramesToProcess, UInt32 inTimeoutLimit, bool &ioSilence )
+	{
+		if(ioSilence )
+		{
+			if(mResetTimer )
+			{
+				mTimeoutCounter = inTimeoutLimit;
+				mResetTimer = false;
+			}
+			
+			if(mTimeoutCounter > 0 )
+			{
+				mTimeoutCounter -= inFramesToProcess;
+				ioSilence = false;
+			}
+		}
+		else
+		{
+			// signal to reset the next time we receive silence
+			mResetTimer = true;	
+		}
+	}
+
+	void				Reset()
+	{
+		mResetTimer = true;
+	};
+
+
+
+private:
+	SInt32				mTimeoutCounter;
+	bool				mResetTimer;
+};
+
+#endif // __AUSilentTimeout
-- 
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