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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#ifndef IOSAUDIOUTILS_H
#define IOSAUDIOUTILS_H
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists purely as an
// implementation detail. This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
#include <CoreAudio/CoreAudioTypes.h>
#include <QtMultimedia/QAudioFormat>
#include <QtCore/qglobal.h>
QT_BEGIN_NAMESPACE
class CoreAudioUtils
{
public:
static quint64 currentTime();
static double frequency();
static Q_MULTIMEDIA_EXPORT QAudioFormat toQAudioFormat(const AudioStreamBasicDescription& streamFormat);
static AudioStreamBasicDescription toAudioStreamBasicDescription(QAudioFormat const& audioFormat);
// ownership is transferred to caller, free with ::free()
static std::unique_ptr<AudioChannelLayout> toAudioChannelLayout(const QAudioFormat &format, UInt32 *size);
static QAudioFormat::ChannelConfig fromAudioChannelLayout(const AudioChannelLayout *layout);
private:
static void initialize();
static double sFrequency;
static bool sIsInitialized;
};
class CoreAudioRingBuffer
{
public:
typedef QPair<char*, int> Region;
CoreAudioRingBuffer(int bufferSize);
~CoreAudioRingBuffer();
Region acquireReadRegion(int size);
void releaseReadRegion(Region const& region);
Region acquireWriteRegion(int size);
void releaseWriteRegion(Region const& region);
int used() const;
int free() const;
int size() const;
void reset();
private:
int m_bufferSize;
int m_readPos;
int m_writePos;
char* m_buffer;
QAtomicInt m_bufferUsed;
};
QT_END_NAMESPACE
#endif // IOSAUDIOUTILS_H
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