qqnxaudiosink_p.h - mozsearch

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// Copyright (C) 2016 Research In Motion

// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only

#ifndef QNXAUDIOOUTPUT_H

#define QNXAUDIOOUTPUT_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 "private/qaudiosystem_p.h"

#include "qqnxaudioutils_p.h"

#include <QElapsedTimer>

#include <QTimer>

#include <QIODevice>

#include <QSocketNotifier>

#include <sys/asoundlib.h>

#include <sys/neutrino.h>

QT_BEGIN_NAMESPACE

class QnxPushIODevice;

class QQnxAudioSink : public QPlatformAudioSink

    Q_OBJECT

public:

    explicit QQnxAudioSink(QAudioDevice deviceInfo, const QAudioFormat &, QObject *parent);

    ~QQnxAudioSink();

    void start(QIODevice *source) override;

    QIODevice *start() override;

    void stop() override;

    void reset() override;

    void suspend() override;

    void resume() override;

    qsizetype bytesFree() const override;

    void setBufferSize(qsizetype) override;

    qsizetype bufferSize() const override;

    qint64 processedUSecs() const override;

    QAudio::State state() const override;

    qint64 pushData(const char *data, qint64 len);

private Q_SLOTS:

    void pullData();

    void pcmNotifierActivated(int socket);

private:

    bool open();

    void close();

    void changeState(QAudio::State state, QAudio::Error error);

    void addPcmEventFilter();

    void createPcmNotifiers();

    void destroyPcmNotifiers();

    void suspendInternal(QAudio::State suspendState);

    void resumeInternal();

    void updateState();

    qint64 write(const char *data, qint64 len);

    QIODevice *m_source;

    bool m_pushSource;

    QTimer *m_timer;

    QAudio::State m_state;

    QAudio::State m_suspendedInState;

    int m_periodSize;

    QnxAudioUtils::HandleUniquePtr m_pcmHandle;

    qint64 m_bytesWritten;

    int m_requestedBufferSize;

    QSocketNotifier *m_pcmNotifier;

};

class QnxPushIODevice : public QIODevice

    Q_OBJECT

public:

    explicit QnxPushIODevice(QQnxAudioSink *output);

    ~QnxPushIODevice();

    qint64 readData(char *data, qint64 len);

    qint64 writeData(const char *data, qint64 len);

    bool isSequential() const override;

private:

    QQnxAudioSink *m_output;

};

QT_END_NAMESPACE

#endif