qpulseaudiosource_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

//

//  W A R N I N G

//  -------------

//

// This file is not part of the Qt API.  It exists for the convenience

// of other Qt classes.  This header file may change from version to

// version without notice, or even be removed.

//

// We mean it.

//

#ifndef QPULSEAUDIOSOURCE_P_H

#define QPULSEAUDIOSOURCE_P_H

#include <QtCore/qtclasshelpermacros.h>

#include <QtMultimedia/qaudio.h>

#include <QtMultimedia/qaudiodevice.h>

#include <QtMultimedia/private/qaudio_platform_implementation_support_p.h>

#include <QtMultimedia/private/qaudiosystem_p.h>

#include <QtMultimedia/private/qpulsehelpers_p.h>

QT_BEGIN_NAMESPACE

namespace QPulseAudioInternal {

class QPulseAudioSource;

using namespace QtMultimediaPrivate;

struct QPulseAudioSourceStream final : QPlatformAudioSourceStream

    using SourceType = QPulseAudioSource;

    QPulseAudioSourceStream(QAudioDevice, const QAudioFormat &,

                            std::optional<qsizetype> ringbufferSize, QPulseAudioSource *parent,

                            float volume, std::optional<NativePeriodFrames> nativePeriodFrames);

    Q_DISABLE_COPY_MOVE(QPulseAudioSourceStream)

    ~QPulseAudioSourceStream();

    using QPlatformAudioSourceStream::bytesReady;

    using QPlatformAudioSourceStream::deviceIsRingbufferReader;

    using QPlatformAudioSourceStream::processedDuration;

    using QPlatformAudioSourceStream::ringbufferSizeInBytes;

    using QPlatformAudioSourceStream::setVolume;

    bool start(QIODevice *device);

    bool start(AudioCallback &&);

    QIODevice *start();

    void stop(ShutdownPolicy);

    void suspend();

    void resume();

    bool open() const;

    void updateStreamIdle(bool idle) override;

private:

    enum class StreamType : uint8_t

        Ringbuffer,

        Callback,

};

    bool startStream(StreamType);

    void installCallbacks(StreamType);

    void uninstallCallbacks();

    QPulseAudioSource *m_parent;

    PAStreamHandle m_stream;

    std::optional<AudioCallback> m_audioCallback;

    // PulseAudio callbacks

    void readCallbackRingbuffer(size_t bytesToRead);

    void readCallbackAudioCallback(size_t bytesToRead);

};

////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

class QPulseAudioSource final

    : public QPlatformAudioSourceImplementationWithCallback<QPulseAudioSourceStream,

                                                            QPulseAudioSource>

    using BaseClass = QPlatformAudioSourceImplementationWithCallback<QPulseAudioSourceStream,

                                                                     QPulseAudioSource>;

public:

    QPulseAudioSource(QAudioDevice, const QAudioFormat &, QObject *parent);

    ~QPulseAudioSource() override;

    void start(QIODevice *device) override;

    void start(AudioCallback &&) override;

    QIODevice *start() override;

private:

    bool validatePulseaudio();

};

} // namespace QPulseAudioInternal

QT_END_NAMESPACE

#endif // QPULSEAUDIOSOURCE_P_H