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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef IOSAUDIOOUTPUT_H
#define IOSAUDIOOUTPUT_H
#include <qaudiosystem.h>
#if defined(Q_OS_OSX)
# include <CoreAudio/CoreAudio.h>
#endif
#include <AudioUnit/AudioUnit.h>
#include <CoreAudio/CoreAudioTypes.h>
#include <QtCore/QIODevice>
#include <QtCore/QWaitCondition>
#include <QtCore/QMutex>
QT_BEGIN_NAMESPACE
class CoreAudioOutputBuffer;
class QTimer;
class CoreAudioDeviceInfo;
class CoreAudioRingBuffer;
class CoreAudioOutputBuffer : public QObject
{
Q_OBJECT
public:
CoreAudioOutputBuffer(int bufferSize, int maxPeriodSize, QAudioFormat const& audioFormat);
~CoreAudioOutputBuffer();
qint64 readFrames(char *data, qint64 maxFrames);
qint64 writeBytes(const char *data, qint64 maxSize);
int available() const;
void reset();
void setPrefetchDevice(QIODevice *device);
void startFillTimer();
void stopFillTimer();
signals:
void readyRead();
private slots:
void fillBuffer();
private:
bool m_deviceError;
int m_maxPeriodSize;
int m_bytesPerFrame;
int m_periodTime;
QIODevice *m_device;
QTimer *m_fillTimer;
CoreAudioRingBuffer *m_buffer;
};
class CoreAudioOutputDevice : public QIODevice
{
public:
CoreAudioOutputDevice(CoreAudioOutputBuffer *audioBuffer, QObject *parent);
qint64 readData(char *data, qint64 len);
qint64 writeData(const char *data, qint64 len);
bool isSequential() const { return true; }
private:
CoreAudioOutputBuffer *m_audioBuffer;
};
class CoreAudioOutput : public QAbstractAudioOutput
{
Q_OBJECT
public:
CoreAudioOutput(const QByteArray &device);
~CoreAudioOutput();
void start(QIODevice *device);
QIODevice *start();
void stop();
void reset();
void suspend();
void resume();
int bytesFree() const;
int periodSize() const;
void setBufferSize(int value);
int bufferSize() const;
void setNotifyInterval(int milliSeconds);
int notifyInterval() const;
qint64 processedUSecs() const;
qint64 elapsedUSecs() const;
QAudio::Error error() const;
QAudio::State state() const;
void setFormat(const QAudioFormat &format);
QAudioFormat format() const;
void setVolume(qreal volume);
qreal volume() const;
void setCategory(const QString &category);
QString category() const;
private slots:
void deviceStopped();
void inputReady();
private:
enum {
Running,
Draining,
Stopped
};
static OSStatus renderCallback(void *inRefCon,
AudioUnitRenderActionFlags *ioActionFlags,
const AudioTimeStamp *inTimeStamp,
UInt32 inBusNumber,
UInt32 inNumberFrames,
AudioBufferList *ioData);
bool open();
void close();
void audioThreadStart();
void audioThreadStop();
void audioThreadDrain();
void audioDeviceStop();
void audioDeviceIdle();
void audioDeviceError();
void startTimers();
void stopTimers();
QByteArray m_device;
bool m_isOpen;
int m_internalBufferSize;
int m_periodSizeBytes;
qint64 m_totalFrames;
QAudioFormat m_audioFormat;
QIODevice *m_audioIO;
#if defined(Q_OS_OSX)
AudioDeviceID m_audioDeviceId;
#endif
AudioUnit m_audioUnit;
Float64 m_clockFrequency;
UInt64 m_startTime;
AudioStreamBasicDescription m_streamFormat;
CoreAudioOutputBuffer *m_audioBuffer;
QAtomicInt m_audioThreadState;
QWaitCondition m_threadFinished;
QMutex m_mutex;
QTimer *m_intervalTimer;
CoreAudioDeviceInfo *m_audioDeviceInfo;
qreal m_cachedVolume;
QAudio::Error m_errorCode;
QAudio::State m_stateCode;
};
QT_END_NAMESPACE
#endif // IOSAUDIOOUTPUT_H
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