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+/*
+     File: AUInputElement.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
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+ 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,
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+ 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 __AUInput_h__
+#define __AUInput_h__
+
+#include "AUScopeElement.h"
+#include "AUBuffer.h"
+
+/*! @class AUInputElement */
+class AUInputElement : public AUIOElement {
+public:
+	
+	/*! @ctor AUInputElement */
+						AUInputElement(AUBase *audioUnit);
+	/*! @dtor ~AUInputElement */
+	virtual				~AUInputElement() { }
+
+	// AUElement override
+	/*! @method SetStreamFormat */
+	virtual OSStatus	SetStreamFormat(const CAStreamBasicDescription &desc);
+	/*! @method NeedsBufferSpace */
+	virtual bool		NeedsBufferSpace() const { return IsCallback(); }
+
+	/*! @method SetConnection */
+	void				SetConnection(const AudioUnitConnection &conn);
+	/*! @method SetInputCallback */
+	void				SetInputCallback(AURenderCallback proc, void *refCon);
+
+	/*! @method IsActive */
+	bool				IsActive() const { return mInputType != kNoInput; }
+	/*! @method IsCallback */
+	bool				IsCallback() const { return mInputType == kFromCallback; }
+	/*! @method HasConnection */
+	bool				HasConnection() const { return mInputType == kFromConnection; }
+
+	/*! @method PullInput */
+	OSStatus			PullInput(	AudioUnitRenderActionFlags &  	ioActionFlags,
+									const AudioTimeStamp &			inTimeStamp,
+									AudioUnitElement				inElement,
+									UInt32							inNumberFrames);
+
+	/*! @method PullInputWithBufferList */
+	OSStatus			PullInputWithBufferList(	AudioUnitRenderActionFlags &  	ioActionFlags,
+													const AudioTimeStamp &			inTimeStamp,
+													AudioUnitElement				inElement,
+													UInt32							nFrames,
+													AudioBufferList *				inBufferList);
+protected:
+	/*! @method Disconnect */
+	void				Disconnect();
+
+	enum EInputType { kNoInput, kFromConnection, kFromCallback };
+
+	/*! @var mInputType */
+	EInputType					mInputType;
+
+	// if from callback:
+	/*! @var mInputProc */
+	AURenderCallback			mInputProc;
+	/*! @var mInputProcRefCon */
+	void *						mInputProcRefCon;
+	
+	// if from connection:
+	/*! @var mConnection */
+	AudioUnitConnection			mConnection;
+#if !CA_USE_AUDIO_PLUGIN_ONLY
+	/*! @var mConnRenderProc */
+	AudioUnitRenderProc			mConnRenderProc;
+#endif
+	/*! @var mConnInstanceStorage */
+	void *						mConnInstanceStorage;		// for the input component
+};
+
+
+#endif // __AUInput_h__