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/*
File: CAAUParameter.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 __CAAUParameter_h__
#define __CAAUParameter_h__
#include <AudioToolbox/AudioUnitUtilities.h>
// ____________________________________________________________________________
// CAAUParameter
// complete parameter specification
/*! @class CAAUParameter */
class CAAUParameter : public AudioUnitParameter {
public:
/*! @ctor CAAUParameter.0 */
CAAUParameter();
/*! @ctor CAAUParameter.1 */
CAAUParameter(AudioUnit au, AudioUnitParameterID param, AudioUnitScope scope, AudioUnitElement element);
/*! @ctor CAAUParameter.2 */
CAAUParameter(AudioUnitParameter &inParam);
/*! @ctor CAAUParameter.3 */
CAAUParameter(const CAAUParameter &a);
/*! @dtor ~CAAUParameter */
~CAAUParameter();
/*! @method operator <@ */
bool operator < (const CAAUParameter &a) const
{
return memcmp(this, &a, sizeof(AudioUnitParameter)) < 0;
}
/*! @method operator ==@ */
bool operator == (const CAAUParameter &a) const
{
return !memcmp(this, &a, sizeof(AudioUnitParameter));
}
/*! @method operator =@ */
CAAUParameter & operator = (const CAAUParameter &a);
/*! @method GetValue */
Float32 GetValue() const;
/*! @method SetValue */
void SetValue( AUParameterListenerRef inListener,
void * inObject,
Float32 inValue) const;
/*! @method GetName */
CFStringRef GetName() const { return mParamName; }
// borrowed reference!
/*! @method GetStringFromValueCopy */
CFStringRef GetStringFromValueCopy(const Float32 *value = NULL) const;
// returns a copy of the name of the current parameter value
// or null if there is no name associated
// caller must release
/*! @method ValuesHaveStrings */
bool ValuesHaveStrings () const
{
return (mParamInfo.flags & kAudioUnitParameterFlag_ValuesHaveStrings) != 0;
}
/*! @method GetValueFromString */
Float32 GetValueFromString (CFStringRef str) const;
// caller must release
/*! @method ParamInfo */
const AudioUnitParameterInfo &
ParamInfo() const { return mParamInfo; }
/*! @method GetParamTag */
CFStringRef GetParamTag() const { return mParamTag; }
// this may return null! -
// in which case there is no descriptive tag for the parameter
/*! @method GetParamName */
CFStringRef GetParamName (int inIndex) const
// this can return null if there is no name for the parameter
{
return (mNamedParams && inIndex < mNumIndexedParams)
? (CFStringRef) CFArrayGetValueAtIndex(mNamedParams, inIndex)
: 0;
}
/*! @method GetNumIndexedParams */
int GetNumIndexedParams () const { return mNumIndexedParams; }
/*! @method IsIndexedParam */
bool IsIndexedParam () const { return mNumIndexedParams != 0; }
/*! @method HasNamedParams */
bool HasNamedParams () const { return IsIndexedParam() && mNamedParams; }
/*! @method GetClumpID */
bool GetClumpID (UInt32 &outClumpID) const
{
if (mParamInfo.flags & kAudioUnitParameterFlag_HasClump) {
outClumpID = mParamInfo.clumpID;
return true;
}
return false;
}
/*! @method HasDisplayTransformation */
bool HasDisplayTransformation () const
{
return GetAudioUnitParameterDisplayType (mParamInfo.flags);
}
/*! @method IsExpert */
bool IsExpert () const
{
return mParamInfo.flags & kAudioUnitParameterFlag_ExpertMode;
}
#if DEBUG
void Print () const;
#endif
// these methods are defined in CAPersistence.cpp
// they will persist and restore only the scope, element and param ID's of the AudioUnitParameter
// however, this is sufficient to be able to save/restore a CAAUParameter object
void Save (CFPropertyListRef &outData) const;
static void Save (const AudioUnitParameter &inParam, CFPropertyListRef &outData);
static OSStatus Restore (const CFPropertyListRef inData, AudioUnitParameter &outParam);
protected:
// cached parameter info
/*! @var mParamInfo */
AudioUnitParameterInfo mParamInfo;
/*! @var mParamName */
CFStringRef mParamName;
/*! @var mParamTag */
CFStringRef mParamTag;
/*! @var mNumIndexedParams */
short mNumIndexedParams;
/*! @var mNamedParams */
CFArrayRef mNamedParams;
private:
void Init (AudioUnit au, AudioUnitParameterID param, AudioUnitScope scope, AudioUnitElement element);
};
#endif // __CAAUParameter_h__
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