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/****************************************************************************
**
** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** This file may be used under the terms of the GNU Lesser General Public
** License version 2.1 as published by the Free Software Foundation and
** appearing in the file LICENSE.LGPL included in the packaging of this
** file. Please review the following information to ensure the GNU Lesser
** General Public License version 2.1 requirements will be met:
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU General
** Public License version 3.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of this
** file. Please review the following information to ensure the GNU General
** Public License version 3.0 requirements will be met:
** http://www.gnu.org/copyleft/gpl.html.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qaudio_mac_p.h"
QT_BEGIN_NAMESPACE
// Conversion
QAudioFormat toQAudioFormat(AudioStreamBasicDescription const& sf)
{
QAudioFormat audioFormat;
audioFormat.setFrequency(sf.mSampleRate);
audioFormat.setChannels(sf.mChannelsPerFrame);
audioFormat.setSampleSize(sf.mBitsPerChannel);
audioFormat.setCodec(QString::fromLatin1("audio/pcm"));
audioFormat.setByteOrder((sf.mFormatFlags & kAudioFormatFlagIsBigEndian) != 0 ? QAudioFormat::BigEndian : QAudioFormat::LittleEndian);
QAudioFormat::SampleType type = QAudioFormat::UnSignedInt;
if ((sf.mFormatFlags & kAudioFormatFlagIsSignedInteger) != 0)
type = QAudioFormat::SignedInt;
else if ((sf.mFormatFlags & kAudioFormatFlagIsFloat) != 0)
type = QAudioFormat::Float;
audioFormat.setSampleType(type);
return audioFormat;
}
AudioStreamBasicDescription toAudioStreamBasicDescription(QAudioFormat const& audioFormat)
{
AudioStreamBasicDescription sf;
sf.mFormatFlags = kAudioFormatFlagIsPacked;
sf.mSampleRate = audioFormat.frequency();
sf.mFramesPerPacket = 1;
sf.mChannelsPerFrame = audioFormat.channels();
sf.mBitsPerChannel = audioFormat.sampleSize();
sf.mBytesPerFrame = sf.mChannelsPerFrame * (sf.mBitsPerChannel / 8);
sf.mBytesPerPacket = sf.mFramesPerPacket * sf.mBytesPerFrame;
sf.mFormatID = kAudioFormatLinearPCM;
switch (audioFormat.sampleType()) {
case QAudioFormat::SignedInt: sf.mFormatFlags |= kAudioFormatFlagIsSignedInteger; break;
case QAudioFormat::UnSignedInt: /* default */ break;
case QAudioFormat::Float: sf.mFormatFlags |= kAudioFormatFlagIsFloat; break;
case QAudioFormat::Unknown: default: break;
}
if (audioFormat.byteOrder() == QAudioFormat::BigEndian)
sf.mFormatFlags |= kAudioFormatFlagIsBigEndian;
return sf;
}
// QAudioRingBuffer
QAudioRingBuffer::QAudioRingBuffer(int bufferSize):
m_bufferSize(bufferSize)
{
m_buffer = new char[m_bufferSize];
reset();
}
QAudioRingBuffer::~QAudioRingBuffer()
{
delete m_buffer;
}
int QAudioRingBuffer::used() const
{
return m_bufferUsed.load();
}
int QAudioRingBuffer::free() const
{
return m_bufferSize - m_bufferUsed.load();
}
int QAudioRingBuffer::size() const
{
return m_bufferSize;
}
void QAudioRingBuffer::reset()
{
m_readPos = 0;
m_writePos = 0;
m_bufferUsed.store(0);
}
QT_END_NAMESPACE
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