CoreAudio: Create an audio plugin supporting iOS and OS X
This removes the Mac audio backend that was hardcoded into QtMultimedia and adds a new audio plugin using the CoreAudio API. Change-Id: Ib15291825f9452a3763e0eeb281d952deb0bad3d Reviewed-by: Richard Moe Gustavsen <richard.gustavsen@digia.com> Reviewed-by: Christian Stromme <christian.stromme@digia.com> Reviewed-by: Yoann Lopes <yoann.lopes@digia.com>
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204
src/plugins/coreaudio/coreaudiooutput.h
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204
src/plugins/coreaudio/coreaudiooutput.h
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/****************************************************************************
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**
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** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
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** Contact: http://www.qt-project.org/legal
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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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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and Digia. For licensing terms and
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** conditions see http://qt.digia.com/licensing. For further information
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** use the contact form at http://qt.digia.com/contact-us.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU Lesser General Public License version 2.1 requirements
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** will be met: 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, Digia gives you certain additional
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** rights. These rights are described in the Digia 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
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** General Public License version 3.0 as published by the Free Software
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** Foundation and appearing in the file LICENSE.GPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU General Public License version 3.0 requirements will be
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** met: http://www.gnu.org/copyleft/gpl.html.
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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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#ifndef IOSAUDIOOUTPUT_H
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#define IOSAUDIOOUTPUT_H
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#include <qaudiosystem.h>
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#if defined(Q_OS_OSX)
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# include <CoreAudio/CoreAudio.h>
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#endif
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#include <AudioUnit/AudioUnit.h>
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#include <CoreAudio/CoreAudioTypes.h>
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#include <QtCore/QWaitCondition>
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#include <QtCore/QMutex>
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QT_BEGIN_NAMESPACE
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class CoreAudioOutputBuffer;
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class QTimer;
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class CoreAudioDeviceInfo;
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class CoreAudioRingBuffer;
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class CoreAudioOutputBuffer : public QObject
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{
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Q_OBJECT
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public:
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CoreAudioOutputBuffer(int bufferSize, int maxPeriodSize, QAudioFormat const& audioFormat);
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~CoreAudioOutputBuffer();
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qint64 readFrames(char *data, qint64 maxFrames);
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qint64 writeBytes(const char *data, qint64 maxSize);
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int available() const;
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void reset();
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void setPrefetchDevice(QIODevice *device);
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void startFillTimer();
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void stopFillTimer();
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signals:
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void readyRead();
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private slots:
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void fillBuffer();
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private:
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bool m_deviceError;
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int m_maxPeriodSize;
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int m_bytesPerFrame;
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int m_periodTime;
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QIODevice *m_device;
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QTimer *m_fillTimer;
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CoreAudioRingBuffer *m_buffer;
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};
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class CoreAudioOutputDevice : public QIODevice
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{
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public:
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CoreAudioOutputDevice(CoreAudioOutputBuffer *audioBuffer, QObject *parent);
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qint64 readData(char *data, qint64 len);
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qint64 writeData(const char *data, qint64 len);
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bool isSequential() const { return true; }
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private:
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CoreAudioOutputBuffer *m_audioBuffer;
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};
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class CoreAudioOutput : public QAbstractAudioOutput
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{
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Q_OBJECT
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public:
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CoreAudioOutput(const QByteArray &device);
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~CoreAudioOutput();
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void start(QIODevice *device);
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QIODevice *start();
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void stop();
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void reset();
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void suspend();
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void resume();
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int bytesFree() const;
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int periodSize() const;
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void setBufferSize(int value);
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int bufferSize() const;
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void setNotifyInterval(int milliSeconds);
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int notifyInterval() const;
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qint64 processedUSecs() const;
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qint64 elapsedUSecs() const;
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QAudio::Error error() const;
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QAudio::State state() const;
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void setFormat(const QAudioFormat &format);
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QAudioFormat format() const;
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void setVolume(qreal volume);
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qreal volume() const;
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void setCategory(const QString &category);
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QString category() const;
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private slots:
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void deviceStopped();
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void inputReady();
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private:
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enum {
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Running,
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Draining,
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Stopped
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};
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static OSStatus renderCallback(void *inRefCon,
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AudioUnitRenderActionFlags *ioActionFlags,
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const AudioTimeStamp *inTimeStamp,
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UInt32 inBusNumber,
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UInt32 inNumberFrames,
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AudioBufferList *ioData);
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bool open();
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void close();
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void audioThreadStart();
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void audioThreadStop();
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void audioThreadDrain();
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void audioDeviceStop();
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void audioDeviceIdle();
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void audioDeviceError();
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void startTimers();
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void stopTimers();
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QByteArray m_device;
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bool m_isOpen;
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int m_internalBufferSize;
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int m_periodSizeBytes;
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qint64 m_totalFrames;
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QAudioFormat m_audioFormat;
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QIODevice *m_audioIO;
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#if defined(Q_OS_OSX)
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AudioDeviceID m_audioDeviceId;
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#endif
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AudioUnit m_audioUnit;
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Float64 m_clockFrequency;
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UInt64 m_startTime;
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AudioStreamBasicDescription m_streamFormat;
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CoreAudioOutputBuffer *m_audioBuffer;
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QAtomicInt m_audioThreadState;
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QWaitCondition m_threadFinished;
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QMutex m_mutex;
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QTimer *m_intervalTimer;
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CoreAudioDeviceInfo *m_audioDeviceInfo;
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qreal m_cachedVolume;
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QAudio::Error m_errorCode;
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QAudio::State m_stateCode;
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};
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QT_END_NAMESPACE
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#endif // IOSAUDIOOUTPUT_H
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