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/*
File: CAAudioChannelLayout.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.
*/
#if !defined(__CAAudioChannelLayout_h__)
#define __CAAudioChannelLayout_h__
//=============================================================================
// Includes
//=============================================================================
// System Includes
#if !defined(__COREAUDIO_USE_FLAT_INCLUDES__)
#include <CoreAudio/CoreAudioTypes.h>
#include <CoreFoundation/CoreFoundation.h>
#else
#include <CoreAudioTypes.h>
#include <CoreFoundation.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "CADebugMacros.h"
#include "CAAutoDisposer.h"
#if !HAL_Build
#include "CAReferenceCounted.h"
#endif
//=============================================================================
// CAAudioChannelLayout
//=============================================================================
bool operator== (const AudioChannelLayout &x, const AudioChannelLayout &y);
bool operator!= (const AudioChannelLayout &x, const AudioChannelLayout &y);
extern "C" void CAShowAudioChannelLayout (FILE* file, const AudioChannelLayout *layout);
class CAAudioChannelLayout
{
// static Construction/Destruction
public:
static AudioChannelLayout* Create(UInt32 inNumberChannelDescriptions);
static void Destroy(AudioChannelLayout* inChannelLayout);
static UInt32 CalculateByteSize(UInt32 inNumberChannelDescriptions) {
return SizeOf32(AudioChannelLayout) - SizeOf32(AudioChannelDescription) + (inNumberChannelDescriptions * SizeOf32(AudioChannelDescription));
}
static void SetAllToUnknown(AudioChannelLayout& outChannelLayout, UInt32 inNumberChannelDescriptions);
static UInt32 NumberChannels(const AudioChannelLayout& inLayout);
#if !HAL_Build
// object methods
public:
CAAudioChannelLayout ();
CAAudioChannelLayout (UInt32 inNumberChannels, bool inChooseSurround);
// if inChooseSurround is false, then symmetrical speaker arrangements
// are chosen in place of surround layouts if there is a choice
// This call chooses layouts based on the expected defaults in
// AudioUnit usage
CAAudioChannelLayout (AudioChannelLayoutTag inTag);
CAAudioChannelLayout (const CAAudioChannelLayout &c);
CAAudioChannelLayout (const AudioChannelLayout* inChannelLayout);
~CAAudioChannelLayout();
CAAudioChannelLayout& operator= (const AudioChannelLayout* inChannelLayout);
CAAudioChannelLayout& operator= (const CAAudioChannelLayout& c);
bool operator== (const CAAudioChannelLayout &c) const;
bool operator!= (const CAAudioChannelLayout &c) const;
void SetWithTag(AudioChannelLayoutTag inTag);
bool IsValid() const { return NumberChannels() > 0; }
UInt32 Size() const { return mLayout ? mLayout->Size() : 0; }
UInt32 NumberChannels() const { return mLayout ? mLayout->NumberChannels() : 0; }
AudioChannelLayoutTag Tag() const { return Layout().mChannelLayoutTag; }
const AudioChannelLayout& Layout() const { return mLayout->Layout(); }
operator const AudioChannelLayout *() const { return &Layout(); }
void Print () const { Print (stdout); }
void Print (FILE* file) const;
OSStatus Save (CFPropertyListRef *outData) const;
OSStatus Restore (CFPropertyListRef &inData);
private:
class RefCountedLayout : public CAReferenceCounted {
void * operator new(size_t /* size */, size_t aclSize)
{
return CA_malloc(sizeof(RefCountedLayout) - sizeof(AudioChannelLayout) + aclSize);
}
void operator delete(void *mem)
{
free(mem);
}
RefCountedLayout(UInt32 inDataSize) :
mByteSize(inDataSize)
{
memset(&mACL, 0, inDataSize);
}
public:
static RefCountedLayout *CreateWithNumberChannelDescriptions(unsigned nChannels) {
size_t size = CAAudioChannelLayout::CalculateByteSize(nChannels);
return new(size) RefCountedLayout((UInt32)size);
}
static RefCountedLayout *CreateWithLayout(const AudioChannelLayout *layout) {
size_t size = CAAudioChannelLayout::CalculateByteSize(layout->mNumberChannelDescriptions);
RefCountedLayout *acl = new(size) RefCountedLayout((UInt32)size);
memcpy(&acl->mACL, layout, size);
return acl;
}
static RefCountedLayout *CreateWithLayoutTag(AudioChannelLayoutTag layoutTag) {
RefCountedLayout *acl = CreateWithNumberChannelDescriptions(0);
acl->mACL.mChannelLayoutTag = layoutTag;
return acl;
}
const AudioChannelLayout & Layout() const { return mACL; }
UInt32 Size () const { return mByteSize; }
UInt32 NumberChannels() { return CAAudioChannelLayout::NumberChannels(Layout()); }
private:
const UInt32 mByteSize;
AudioChannelLayout mACL;
// * * * mACL is variable length and thus must be last * * *
// only the constructors can change the actual state of the layout
friend CAAudioChannelLayout::CAAudioChannelLayout (UInt32 inNumberChannels, bool inChooseSurround);
friend OSStatus CAAudioChannelLayout::Restore (CFPropertyListRef &inData);
friend CAAudioChannelLayout& CAAudioChannelLayout::operator= (const AudioChannelLayout* inChannelLayout);
friend void CAAudioChannelLayout::SetWithTag(AudioChannelLayoutTag inTag);
AudioChannelLayout * GetLayout() { return &mACL; }
private:
// prohibited methods: private and unimplemented.
RefCountedLayout();
RefCountedLayout(const RefCountedLayout& c);
RefCountedLayout& operator=(const RefCountedLayout& c);
};
RefCountedLayout *mLayout;
#endif // HAL_Build
};
#endif
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