03f22bcdaf
There are a few legacy bits left in place so it passes CI, and then qt5.git etc can be updated. Change-Id: I6b082e50e6958c72fdabc2974992e16d90dafa3a Reviewed-on: http://codereview.qt-project.org/5368 Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com> Reviewed-by: Jonas Rabbe <jonas.rabbe@nokia.com>
146 lines
3.9 KiB
C++
146 lines
3.9 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
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** All rights reserved.
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** Contact: Nokia Corporation (qt-info@nokia.com)
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**
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** This file is part of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** GNU Lesser General Public License Usage
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** This file may be used under the terms of the GNU Lesser General Public
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** License version 2.1 as published by the Free Software Foundation and
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** appearing in the file LICENSE.LGPL included in the packaging of this
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** file. Please review the following information to ensure the GNU Lesser
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** General Public License version 2.1 requirements will be met:
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** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Nokia gives you certain additional
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** rights. These rights are described in the Nokia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU General
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** Public License version 3.0 as published by the Free Software Foundation
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** and appearing in the file LICENSE.GPL included in the packaging of this
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** file. Please review the following information to ensure the GNU General
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** Public License version 3.0 requirements will be met:
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** http://www.gnu.org/copyleft/gpl.html.
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**
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** Other Usage
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** Alternatively, this file may be used in accordance with the terms and
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** conditions contained in a signed written agreement between you and Nokia.
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**
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**
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**
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**
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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//
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// W A R N I N G
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// -------------
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//
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// This file is not part of the Qt API. It exists for the convenience
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// of other Qt classes. This header file may change from version to
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// version without notice, or even be removed.
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//
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// We mean it.
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//
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#ifndef QAUDIO_MAC_P_H
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#define QAUDIO_MAC_P_H
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#include <CoreAudio/CoreAudio.h>
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#include <QtCore/qdebug.h>
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#include <QtCore/qatomic.h>
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#include <qaudioformat.h>
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QT_BEGIN_HEADER
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QT_BEGIN_NAMESPACE
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QT_MODULE(Multimedia)
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extern QDebug operator<<(QDebug dbg, const QAudioFormat& audioFormat);
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extern QAudioFormat toQAudioFormat(const AudioStreamBasicDescription& streamFormat);
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extern AudioStreamBasicDescription toAudioStreamBasicDescription(QAudioFormat const& audioFormat);
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class QAudioRingBuffer
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{
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public:
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typedef QPair<char*, int> Region;
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QAudioRingBuffer(int bufferSize);
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~QAudioRingBuffer();
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Region acquireReadRegion(int size)
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{
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const int used = m_bufferUsed.fetchAndAddAcquire(0);
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if (used > 0) {
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const int readSize = qMin(size, qMin(m_bufferSize - m_readPos, used));
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return readSize > 0 ? Region(m_buffer + m_readPos, readSize) : Region(0, 0);
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}
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return Region(0, 0);
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}
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void releaseReadRegion(Region const& region)
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{
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m_readPos = (m_readPos + region.second) % m_bufferSize;
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m_bufferUsed.fetchAndAddRelease(-region.second);
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}
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Region acquireWriteRegion(int size)
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{
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const int free = m_bufferSize - m_bufferUsed.fetchAndAddAcquire(0);
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if (free > 0) {
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const int writeSize = qMin(size, qMin(m_bufferSize - m_writePos, free));
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return writeSize > 0 ? Region(m_buffer + m_writePos, writeSize) : Region(0, 0);
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}
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return Region(0, 0);
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}
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void releaseWriteRegion(Region const& region)
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{
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m_writePos = (m_writePos + region.second) % m_bufferSize;
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m_bufferUsed.fetchAndAddRelease(region.second);
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}
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int used() const;
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int free() const;
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int size() const;
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void reset();
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private:
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int m_bufferSize;
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int m_readPos;
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int m_writePos;
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char* m_buffer;
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QAtomicInt m_bufferUsed;
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};
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QT_END_NAMESPACE
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QT_END_HEADER
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#endif // QAUDIO_MAC_P_H
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