qopenslesengine_p.h

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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
 
#ifndef QOPENSLESENGINE_H
#define QOPENSLESENGINE_H
 
//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API.  It exists purely as an
// implementation detail.  This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
 
#include <qglobal.h>
#include <qaudio.h>
#include <qlist.h>
#include <qaudioformat.h>
#include <qaudiodevice.h>
#include <SLES/OpenSLES_Android.h>
 
QT_BEGIN_NAMESPACE
 
class QOpenSLESEngine
{
public:
    enum OutputValue { FramesPerBuffer, SampleRate };
 
    QOpenSLESEngine();
    ~QOpenSLESEngine();
 
    static QOpenSLESEngine *instance();
 
    SLEngineItf slEngine() const { return m_engine; }
 
    static SLAndroidDataFormat_PCM_EX audioFormatToSLFormatPCM(const QAudioFormat &format);
 
    static QList<QAudioDevice> availableDevices(QAudioDevice::Mode mode);
    static bool setAudioOutput(const QByteArray &deviceId);
    QList<int> supportedChannelCounts(QAudioDevice::Mode mode) const;
    QList<int> supportedSampleRates(QAudioDevice::Mode mode) const;
 
    static int getOutputValue(OutputValue type, int defaultValue = 0);
    static int getDefaultBufferSize(const QAudioFormat &format);
    static int getLowLatencyBufferSize(const QAudioFormat &format);
    static bool supportsLowLatency();
    static bool printDebugInfo();
 
private:
    void checkSupportedInputFormats();
    bool inputFormatIsSupported(SLAndroidDataFormat_PCM_EX format);
    SLObjectItf m_engineObject;
    SLEngineItf m_engine;
 
    QList<int> m_supportedInputChannelCounts;
    QList<int> m_supportedInputSampleRates;
    bool m_checkedInputFormats;
};
 
QT_END_NAMESPACE
 
#endif // QOPENSLESENGINE_H