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Diffstat (limited to 'src/multimedia/audio/qaudio_mac.cpp')
-rw-r--r-- | src/multimedia/audio/qaudio_mac.cpp | 142 |
1 files changed, 142 insertions, 0 deletions
diff --git a/src/multimedia/audio/qaudio_mac.cpp b/src/multimedia/audio/qaudio_mac.cpp new file mode 100644 index 0000000..cfa7ca3 --- /dev/null +++ b/src/multimedia/audio/qaudio_mac.cpp @@ -0,0 +1,142 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of the QtMultimedia module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the either Technology Preview License Agreement or the +** Beta Release License Agreement. +** +** GNU Lesser General Public License Usage +** Alternatively, 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 1.0, 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. +** +** If you are unsure which license is appropriate for your use, please +** contact the sales department at http://www.qtsoftware.com/contact. +** $QT_END_LICENSE$ +** +****************************************************************************/ + + +#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 & kLinearPCMFormatFlagIsBigEndian != 0 ? QAudioFormat::BigEndian : QAudioFormat::LittleEndian); + QAudioFormat::SampleType type = QAudioFormat::UnSignedInt; + if ((sf.mFormatFlags & kLinearPCMFormatFlagIsSignedInteger) != 0) + type = QAudioFormat::SignedInt; + else if ((sf.mFormatFlags & kLinearPCMFormatFlagIsFloat) != 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; + } + + 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 + + |