/**************************************************************************** | |
** | |
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). | |
** All rights reserved. | |
** Contact: Nokia Corporation (qt-info@nokia.com) | |
** | |
** This file is part of the QtMultimedia module 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 | |
// Debugging | |
QDebug operator<<(QDebug dbg, const QAudioFormat& audioFormat) | |
{ | |
dbg.nospace() << "QAudioFormat(" << | |
audioFormat.frequency() << "," << | |
audioFormat.channels() << "," << | |
audioFormat.sampleSize()<< "," << | |
audioFormat.codec() << "," << | |
audioFormat.byteOrder() << "," << | |
audioFormat.sampleType() << ")"; | |
return dbg.space(); | |
} | |
// 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; | |
} | |
int QAudioRingBuffer::free() const | |
{ | |
return m_bufferSize - m_bufferUsed; | |
} | |
int QAudioRingBuffer::size() const | |
{ | |
return m_bufferSize; | |
} | |
void QAudioRingBuffer::reset() | |
{ | |
m_readPos = 0; | |
m_writePos = 0; | |
m_bufferUsed = 0; | |
} | |
QT_END_NAMESPACE | |