alternative new version of the AppleUtility library

libs/appleutility/CoreAudio105/AUParamInfo.cpp

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+/*	Copyright: 	© Copyright 2005 Apple Computer, Inc. All rights reserved.
+
+	Disclaimer:	IMPORTANT:  This Apple software is supplied to you by Apple Computer, 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 AppleÕs
+			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 Computer, 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.
+*/
+/*=============================================================================
+	AUParamInfo.cpp
+
+=============================================================================*/
+#include "AUParamInfo.h"
+#include "CAXException.h"
+
+AUParamInfo::AUParamInfo (AudioUnit				inAU,
+							bool				inIncludeExpert,
+							bool				inIncludeReadOnly,
+							AudioUnitScope		inScope,
+							AudioUnitElement	inElement)
+	: mAU (inAU),
+	  mNumParams (0),
+	  mParamListID(NULL),
+	  mScope (inScope),
+	  mElement (inElement)
+{
+	UInt32 size;
+	OSStatus result = AudioUnitGetPropertyInfo(mAU, kAudioUnitProperty_ParameterList, inScope, mElement, &size, NULL);
+		if (size == 0 || result) return;
+
+	int nparams = size / sizeof(AudioUnitPropertyID);
+	mParamListID = new AudioUnitParameterID[nparams];
+
+	memset (mParamListID, 0xFF, size);
+
+	AudioUnitParameterID *paramList = new AudioUnitParameterID[nparams];
+
+	result = AudioUnitGetProperty(mAU, kAudioUnitProperty_ParameterList, mScope, mElement, paramList, &size);
+	if (result) {
+		delete [] mParamListID;
+		delete [] paramList;
+		mParamListID = NULL;
+		return;
+	}
+
+	ParameterMap params;
+	for (int i = 0; i < nparams; ++i)
+	{
+		CAAUParameter auvp (mAU, paramList[i], mScope, mElement); // took out only using global scope in CAAUParameter creation
+		const AudioUnitParameterInfo &paramInfo = auvp.ParamInfo();
+
+		//	don't include if parameter can't be read or written
+		if (!(paramInfo.flags & kAudioUnitParameterFlag_IsWritable)
+			&& !(paramInfo.flags & kAudioUnitParameterFlag_IsReadable))
+			continue;
+
+		// only include if expert params wanted
+		if (!inIncludeExpert && auvp.IsExpert())
+			continue;
+
+		// only include if read only params are wanted
+		if (!(paramInfo.flags & kAudioUnitParameterFlag_IsWritable)
+			&& (paramInfo.flags & kAudioUnitParameterFlag_IsReadable))
+		{
+			if (!inIncludeReadOnly)
+				continue;
+		}
+
+		mParamListID[mNumParams] = paramList[i];
+		mNumParams++;
+
+		// ok - if we're here, then we have a parameter we are going to display.
+		UInt32 clump = 0;
+		auvp.GetClumpID (clump);
+		mParams[clump].push_back (auvp);
+	}
+
+	delete [] paramList;
+}
+
+AUParamInfo::~AUParamInfo()
+{
+	delete [] mParamListID;
+}
+
+UInt32			AUParamInfo::NumParamsForClump (UInt32 inClump) const
+{
+	ParameterMap::const_iterator it = mParams.find(inClump);
+	if (it != mParams.end())
+		return (*it).second.size();
+	return 0;
+}
+
+const CAAUParameter*	AUParamInfo::GetParamInfo (AudioUnitParameterID inParamID) const
+{
+	for (ParameterMap::const_iterator it = mParams.begin(); it != mParams.end(); ++it) {
+		const ParameterList &list = (*it).second;
+		for (ParameterList::const_iterator iter = list.begin(); iter != list.end(); ++iter) {
+			if (inParamID == (*iter).mParameterID) {
+				return &(*iter);
+			}
+		}
+	}
+	return NULL;
+}