mirror of
https://github.com/kyleneideck/BackgroundMusic
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370 lines
12 KiB
C++
370 lines
12 KiB
C++
/*
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File: CAHALAudioObject.cpp
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Abstract: CAHALAudioObject.h
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Version: 1.1
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Disclaimer: IMPORTANT: This Apple software is supplied to you by Apple
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Inc. ("Apple") in consideration of your agreement to the following
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terms, and your use, installation, modification or redistribution of
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this Apple software constitutes acceptance of these terms. If you do
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not agree with these terms, please do not use, install, modify or
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redistribute this Apple software.
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In consideration of your agreement to abide by the following terms, and
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subject to these terms, Apple grants you a personal, non-exclusive
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license, under Apple's copyrights in this original Apple software (the
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"Apple Software"), to use, reproduce, modify and redistribute the Apple
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Software, with or without modifications, in source and/or binary forms;
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provided that if you redistribute the Apple Software in its entirety and
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without modifications, you must retain this notice and the following
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text and disclaimers in all such redistributions of the Apple Software.
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Neither the name, trademarks, service marks or logos of Apple Inc. may
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be used to endorse or promote products derived from the Apple Software
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without specific prior written permission from Apple. Except as
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expressly stated in this notice, no other rights or licenses, express or
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implied, are granted by Apple herein, including but not limited to any
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patent rights that may be infringed by your derivative works or by other
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works in which the Apple Software may be incorporated.
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The Apple Software is provided by Apple on an "AS IS" basis. APPLE
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MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION
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THE IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS
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FOR A PARTICULAR PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND
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OPERATION ALONE OR IN COMBINATION WITH YOUR PRODUCTS.
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IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL
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OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) ARISING IN ANY WAY OUT OF THE USE, REPRODUCTION,
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MODIFICATION AND/OR DISTRIBUTION OF THE APPLE SOFTWARE, HOWEVER CAUSED
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AND WHETHER UNDER THEORY OF CONTRACT, TORT (INCLUDING NEGLIGENCE),
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STRICT LIABILITY OR OTHERWISE, EVEN IF APPLE HAS BEEN ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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Copyright (C) 2014 Apple Inc. All Rights Reserved.
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*/
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//==================================================================================================
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// Includes
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//==================================================================================================
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// Self Include
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#include "CAHALAudioObject.h"
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// PublicUtility Includes
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#include "CAAutoDisposer.h"
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#include "CADebugMacros.h"
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#include "CAException.h"
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#include "CAPropertyAddress.h"
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//==================================================================================================
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// CAHALAudioObject
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//==================================================================================================
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CAHALAudioObject::CAHALAudioObject(AudioObjectID inObjectID)
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:
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mObjectID(inObjectID)
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{
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}
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CAHALAudioObject::~CAHALAudioObject()
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{
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}
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AudioObjectID CAHALAudioObject::GetObjectID() const
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{
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return mObjectID;
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}
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void CAHALAudioObject::SetObjectID(AudioObjectID inObjectID)
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{
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mObjectID = inObjectID;
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}
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AudioClassID CAHALAudioObject::GetClassID() const
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{
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// set up the return value
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AudioClassID theAnswer = 0;
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// set up the property address
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CAPropertyAddress theAddress(kAudioObjectPropertyClass);
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// make sure the property exists
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if(HasProperty(theAddress))
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{
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UInt32 theSize = sizeof(AudioClassID);
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GetPropertyData(theAddress, 0, NULL, theSize, &theAnswer);
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}
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return theAnswer;
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}
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AudioObjectID CAHALAudioObject::GetOwnerObjectID() const
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{
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// set up the return value
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AudioObjectID theAnswer = 0;
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// set up the property address
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CAPropertyAddress theAddress(kAudioObjectPropertyOwner);
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// make sure the property exists
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if(HasProperty(theAddress))
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{
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// get the property data
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UInt32 theSize = sizeof(AudioObjectID);
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GetPropertyData(theAddress, 0, NULL, theSize, &theAnswer);
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}
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return theAnswer;
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}
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CFStringRef CAHALAudioObject::CopyOwningPlugInBundleID() const
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{
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// set up the return value
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CFStringRef theAnswer = NULL;
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// set up the property address
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CAPropertyAddress theAddress(kAudioObjectPropertyCreator);
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// make sure the property exists
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if(HasProperty(theAddress))
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{
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// get the property data
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UInt32 theSize = sizeof(CFStringRef);
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GetPropertyData(theAddress, 0, NULL, theSize, &theAnswer);
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}
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return theAnswer;
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}
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CFStringRef CAHALAudioObject::CopyName() const
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{
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// set up the return value
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CFStringRef theAnswer = NULL;
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// set up the property address
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CAPropertyAddress theAddress(kAudioObjectPropertyName);
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// make sure the property exists
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if(HasProperty(theAddress))
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{
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// get the property data
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UInt32 theSize = sizeof(CFStringRef);
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GetPropertyData(theAddress, 0, NULL, theSize, &theAnswer);
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}
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return theAnswer;
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}
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CFStringRef CAHALAudioObject::CopyManufacturer() const
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{
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// set up the return value
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CFStringRef theAnswer = NULL;
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// set up the property address
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CAPropertyAddress theAddress(kAudioObjectPropertyManufacturer);
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// make sure the property exists
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if(HasProperty(theAddress))
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{
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// get the property data
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UInt32 theSize = sizeof(CFStringRef);
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GetPropertyData(theAddress, 0, NULL, theSize, &theAnswer);
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}
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return theAnswer;
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}
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CFStringRef CAHALAudioObject::CopyNameForElement(AudioObjectPropertyScope inScope, AudioObjectPropertyElement inElement) const
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{
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// set up the return value
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CFStringRef theAnswer = NULL;
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// set up the property address
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CAPropertyAddress theAddress(kAudioObjectPropertyElementName, inScope, inElement);
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// make sure the property exists
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if(HasProperty(theAddress))
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{
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// get the property data
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UInt32 theSize = sizeof(CFStringRef);
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GetPropertyData(theAddress, 0, NULL, theSize, &theAnswer);
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}
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return theAnswer;
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}
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CFStringRef CAHALAudioObject::CopyCategoryNameForElement(AudioObjectPropertyScope inScope, AudioObjectPropertyElement inElement) const
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{
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// set up the return value
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CFStringRef theAnswer = NULL;
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// set up the property address
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CAPropertyAddress theAddress(kAudioObjectPropertyElementCategoryName, inScope, inElement);
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// make sure the property exists
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if(HasProperty(theAddress))
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{
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// get the property data
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UInt32 theSize = sizeof(CFStringRef);
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GetPropertyData(theAddress, 0, NULL, theSize, &theAnswer);
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}
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return theAnswer;
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}
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CFStringRef CAHALAudioObject::CopyNumberNameForElement(AudioObjectPropertyScope inScope, AudioObjectPropertyElement inElement) const
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{
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// set up the return value
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CFStringRef theAnswer = NULL;
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// set up the property address
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CAPropertyAddress theAddress(kAudioObjectPropertyElementNumberName, inScope, inElement);
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// make sure the property exists
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if(HasProperty(theAddress))
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{
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// get the property data
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UInt32 theSize = sizeof(CFStringRef);
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GetPropertyData(theAddress, 0, NULL, theSize, &theAnswer);
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}
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return theAnswer;
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}
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bool CAHALAudioObject::ObjectExists(AudioObjectID inObjectID)
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{
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Boolean isSettable;
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CAPropertyAddress theAddress(kAudioObjectPropertyClass);
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return (inObjectID == 0) || (AudioObjectIsPropertySettable(inObjectID, &theAddress, &isSettable) != 0);
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}
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UInt32 CAHALAudioObject::GetNumberOwnedObjects(AudioClassID inClass) const
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{
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// set up the return value
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UInt32 theAnswer = 0;
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// set up the property address
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CAPropertyAddress theAddress(kAudioObjectPropertyOwnedObjects);
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// figure out the qualifier
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UInt32 theQualifierSize = 0;
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void* theQualifierData = NULL;
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if(inClass != 0)
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{
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theQualifierSize = sizeof(AudioObjectID);
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theQualifierData = &inClass;
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}
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// get the property data size
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theAnswer = GetPropertyDataSize(theAddress, theQualifierSize, theQualifierData);
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// calculate the number of object IDs
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theAnswer /= SizeOf32(AudioObjectID);
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return theAnswer;
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}
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void CAHALAudioObject::GetAllOwnedObjects(AudioClassID inClass, UInt32& ioNumberObjects, AudioObjectID* ioObjectIDs) const
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{
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// set up the property address
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CAPropertyAddress theAddress(kAudioObjectPropertyOwnedObjects);
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// figure out the qualifier
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UInt32 theQualifierSize = 0;
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void* theQualifierData = NULL;
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if(inClass != 0)
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{
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theQualifierSize = sizeof(AudioObjectID);
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theQualifierData = &inClass;
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}
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// get the property data
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UInt32 theDataSize = ioNumberObjects * SizeOf32(AudioClassID);
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GetPropertyData(theAddress, theQualifierSize, theQualifierData, theDataSize, ioObjectIDs);
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// set the number of object IDs being returned
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ioNumberObjects = theDataSize / SizeOf32(AudioObjectID);
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}
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AudioObjectID CAHALAudioObject::GetOwnedObjectByIndex(AudioClassID inClass, UInt32 inIndex)
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{
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// set up the property address
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CAPropertyAddress theAddress(kAudioObjectPropertyOwnedObjects);
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// figure out the qualifier
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UInt32 theQualifierSize = 0;
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void* theQualifierData = NULL;
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if(inClass != 0)
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{
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theQualifierSize = sizeof(AudioObjectID);
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theQualifierData = &inClass;
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}
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// figure out how much space to allocate
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UInt32 theDataSize = GetPropertyDataSize(theAddress, theQualifierSize, theQualifierData);
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UInt32 theNumberObjectIDs = theDataSize / SizeOf32(AudioObjectID);
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// set up the return value
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AudioObjectID theAnswer = 0;
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// maker sure the index is in range
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if(inIndex < theNumberObjectIDs)
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{
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// allocate it
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CAAutoArrayDelete<AudioObjectID> theObjectList(theDataSize / sizeof(AudioObjectID));
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// get the property data
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GetPropertyData(theAddress, theQualifierSize, theQualifierData, theDataSize, theObjectList);
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// get the return value
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theAnswer = theObjectList[inIndex];
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}
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return theAnswer;
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}
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bool CAHALAudioObject::HasProperty(const AudioObjectPropertyAddress& inAddress) const
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{
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return AudioObjectHasProperty(mObjectID, &inAddress);
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}
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bool CAHALAudioObject::IsPropertySettable(const AudioObjectPropertyAddress& inAddress) const
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{
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Boolean isSettable = false;
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OSStatus theError = AudioObjectIsPropertySettable(mObjectID, &inAddress, &isSettable);
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ThrowIfError(theError, CAException(theError), "CAHALAudioObject::IsPropertySettable: got an error getting info about a property");
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return isSettable != 0;
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}
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UInt32 CAHALAudioObject::GetPropertyDataSize(const AudioObjectPropertyAddress& inAddress, UInt32 inQualifierDataSize, const void* inQualifierData) const
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{
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UInt32 theDataSize = 0;
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OSStatus theError = AudioObjectGetPropertyDataSize(mObjectID, &inAddress, inQualifierDataSize, inQualifierData, &theDataSize);
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ThrowIfError(theError, CAException(theError), "CAHALAudioObject::GetPropertyDataSize: got an error getting the property data size");
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return theDataSize;
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}
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void CAHALAudioObject::GetPropertyData(const AudioObjectPropertyAddress& inAddress, UInt32 inQualifierDataSize, const void* inQualifierData, UInt32& ioDataSize, void* outData) const
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{
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OSStatus theError = AudioObjectGetPropertyData(mObjectID, &inAddress, inQualifierDataSize, inQualifierData, &ioDataSize, outData);
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ThrowIfError(theError, CAException(theError), "CAHALAudioObject::GetPropertyData: got an error getting the property data");
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}
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void CAHALAudioObject::SetPropertyData(const AudioObjectPropertyAddress& inAddress, UInt32 inQualifierDataSize, const void* inQualifierData, UInt32 inDataSize, const void* inData)
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{
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OSStatus theError = AudioObjectSetPropertyData(mObjectID, &inAddress, inQualifierDataSize, inQualifierData, inDataSize, inData);
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ThrowIfError(theError, CAException(theError), "CAHALAudioObject::SetPropertyData: got an error setting the property data");
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}
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void CAHALAudioObject::AddPropertyListener(const AudioObjectPropertyAddress& inAddress, AudioObjectPropertyListenerProc inListenerProc, void* inClientData)
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{
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OSStatus theError = AudioObjectAddPropertyListener(mObjectID, &inAddress, inListenerProc, inClientData);
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ThrowIfError(theError, CAException(theError), "CAHALAudioObject::AddPropertyListener: got an error adding a property listener");
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}
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void CAHALAudioObject::RemovePropertyListener(const AudioObjectPropertyAddress& inAddress, AudioObjectPropertyListenerProc inListenerProc, void* inClientData)
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{
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OSStatus theError = AudioObjectRemovePropertyListener(mObjectID, &inAddress, inListenerProc, inClientData);
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ThrowIfError(theError, CAException(theError), "CAHALAudioObject::RemovePropertyListener: got an error removing a property listener");
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}
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