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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Andy Nichols
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The Qt Project
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267
src/plugins/coreaudio/coreaudioinput.h
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267
src/plugins/coreaudio/coreaudioinput.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 IOSAUDIOINPUT_H
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#define IOSAUDIOINPUT_H
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#include <qaudiosystem.h>
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#include <AudioUnit/AudioUnit.h>
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#include <CoreAudio/CoreAudioTypes.h>
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#include <AudioToolbox/AudioToolbox.h>
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#include <QtCore/QWaitCondition>
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#include <QtCore/QMutex>
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#include <QtCore/QTimer>
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QT_BEGIN_NAMESPACE
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class CoreAudioRingBuffer;
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class CoreAudioPacketFeeder;
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class CoreAudioInputBuffer;
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class CoreAudioInputDevice;
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class CoreAudioBufferList
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{
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public:
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CoreAudioBufferList(AudioStreamBasicDescription const& streamFormat);
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CoreAudioBufferList(AudioStreamBasicDescription const& streamFormat, char *buffer, int bufferSize);
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CoreAudioBufferList(AudioStreamBasicDescription const& streamFormat, int framesToBuffer);
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~CoreAudioBufferList();
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AudioBufferList* audioBufferList() const { return m_bufferList; }
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char *data(int buffer = 0) const;
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qint64 bufferSize(int buffer = 0) const;
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int frameCount(int buffer = 0) const;
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int packetCount(int buffer = 0) const;
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int packetSize() const;
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void reset();
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private:
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bool m_owner;
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int m_dataSize;
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AudioStreamBasicDescription m_streamDescription;
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AudioBufferList *m_bufferList;
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};
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class CoreAudioPacketFeeder
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{
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public:
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CoreAudioPacketFeeder(CoreAudioBufferList *abl);
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bool feed(AudioBufferList& dst, UInt32& packetCount);
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bool empty() const;
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private:
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UInt32 m_totalPackets;
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UInt32 m_position;
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CoreAudioBufferList *m_audioBufferList;
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};
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class CoreAudioInputBuffer : public QObject
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{
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Q_OBJECT
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public:
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CoreAudioInputBuffer(int bufferSize,
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int maxPeriodSize,
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AudioStreamBasicDescription const& inputFormat,
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AudioStreamBasicDescription const& outputFormat,
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QObject *parent);
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~CoreAudioInputBuffer();
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qreal volume() const;
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void setVolume(qreal v);
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qint64 renderFromDevice(AudioUnit audioUnit,
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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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qint64 readBytes(char *data, qint64 len);
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void setFlushDevice(QIODevice *device);
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void startFlushTimer();
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void stopFlushTimer();
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void flush(bool all = false);
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void reset();
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int available() const;
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int used() const;
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signals:
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void readyRead();
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private slots:
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void flushBuffer();
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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_periodTime;
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QIODevice *m_device;
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QTimer *m_flushTimer;
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CoreAudioRingBuffer *m_buffer;
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CoreAudioBufferList *m_inputBufferList;
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AudioConverterRef m_audioConverter;
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AudioStreamBasicDescription m_inputFormat;
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AudioStreamBasicDescription m_outputFormat;
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QAudioFormat m_qFormat;
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qreal m_volume;
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const static OSStatus as_empty = 'qtem';
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// Converter callback
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static OSStatus converterCallback(AudioConverterRef inAudioConverter,
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UInt32 *ioNumberDataPackets,
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AudioBufferList *ioData,
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AudioStreamPacketDescription **outDataPacketDescription,
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void *inUserData);
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};
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class CoreAudioInputDevice : public QIODevice
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{
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Q_OBJECT
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public:
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CoreAudioInputDevice(CoreAudioInputBuffer *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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CoreAudioInputBuffer *m_audioBuffer;
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};
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class CoreAudioInput : public QAbstractAudioInput
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{
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Q_OBJECT
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public:
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CoreAudioInput(const QByteArray &device);
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~CoreAudioInput();
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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 bytesReady() 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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private slots:
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void deviceStoppped();
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private:
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enum {
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Running,
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Stopped
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};
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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 audioDeviceStop();
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void audioDeviceActive();
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void audioDeviceFull();
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void audioDeviceError();
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void startTimers();
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void stopTimers();
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// Input callback
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static OSStatus inputCallback(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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QByteArray m_device;
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bool m_isOpen;
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int m_periodSizeBytes;
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int m_internalBufferSize;
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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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AudioUnit m_audioUnit;
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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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Float64 m_clockFrequency;
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UInt64 m_startTime;
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QAudio::Error m_errorCode;
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QAudio::State m_stateCode;
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CoreAudioInputBuffer *m_audioBuffer;
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QMutex m_mutex;
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QWaitCondition m_threadFinished;
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QAtomicInt m_audioThreadState;
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QTimer *m_intervalTimer;
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AudioStreamBasicDescription m_streamFormat;
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AudioStreamBasicDescription m_deviceFormat;
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QAbstractAudioDeviceInfo *m_audioDeviceInfo;
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qreal m_volume;
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};
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QT_END_NAMESPACE
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#endif // IOSAUDIOINPUT_H
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