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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.
*/
/*=============================================================================
CAAudioChannelLayout.h
=============================================================================*/
#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>
#if !HAL_Build
#include "CAReferenceCounted.h"
#endif
//=============================================================================
// CAAudioChannelLayout
//=============================================================================
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 offsetof(AudioChannelLayout, mChannelDescriptions) + inNumberChannelDescriptions * sizeof(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;
void SetWithTag(AudioChannelLayoutTag inTag);
bool IsValid() const { return NumberChannels() > 0; }
UInt32 Size() const { return mLayoutHolder ? mLayoutHolder->Size() : 0; }
UInt32 NumberChannels() const { return NumberChannels(Layout()); }
AudioChannelLayoutTag Tag() const { return Layout().mChannelLayoutTag; }
const AudioChannelLayout& Layout() const { return mLayoutHolder->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 ACLRefCounter : public CAReferenceCounted {
public:
ACLRefCounter (UInt32 inDataSize)
{
if (inDataSize < offsetof(AudioChannelLayout, mChannelDescriptions))
inDataSize = offsetof(AudioChannelLayout, mChannelDescriptions);
mLayout = static_cast<AudioChannelLayout*>(malloc (inDataSize));
memset (mLayout, 0, inDataSize);
mByteSize = inDataSize;
}
const AudioChannelLayout & Layout() const { return *mLayout; }
UInt32 Size () const { return mByteSize; }
private:
AudioChannelLayout *mLayout;
UInt32 mByteSize;
// 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 mLayout; }
~ACLRefCounter() { if (mLayout) { free(mLayout); mLayout = NULL; } }
private:
ACLRefCounter () : mLayout(NULL) { }
ACLRefCounter(const ACLRefCounter& other) : CAReferenceCounted (other), mLayout(NULL) { }
ACLRefCounter& operator=(const ACLRefCounter&) { return *this; }
};
ACLRefCounter *mLayoutHolder;
#endif // HAL_Build
};
#endif
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