qwindowsaudiosource_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 QWINDOWSAUDIOSOURCE_H

#define QWINDOWSAUDIOSOURCE_H

#include <QtCore/qthread.h>

#include <QtCore/qtclasshelpermacros.h>

#include <QtCore/private/qcomptr_p.h>

#include <QtMultimedia/private/qaudiosystem_p.h>

#include <QtMultimedia/private/qaudiosystem_platform_stream_support_p.h>

#include <QtMultimedia/private/qaudio_platform_implementation_support_p.h>

#include <QtMultimedia/private/qwindowsaudioutils_p.h>

#include <QtMultimedia/private/qwindowsresampler_p.h>

#include <atomic>

#include <memory>

#include <memory_resource>

struct IMMDevice;

struct IAudioCaptureClient;

QT_BEGIN_NAMESPACE

namespace QtWASAPI {

class QWindowsAudioSource;

using namespace QtMultimediaPrivate;

struct QWASAPIAudioSourceStream final : std::enable_shared_from_this<QWASAPIAudioSourceStream>,

                                        QPlatformAudioSourceStream

    using SampleFormat = QAudioFormat::SampleFormat;

    using SourceType = QWindowsAudioSource;

    QWASAPIAudioSourceStream(QAudioDevice, const QAudioFormat &,

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

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

    Q_DISABLE_COPY_MOVE(QWASAPIAudioSourceStream)

    ~QWASAPIAudioSourceStream();

    using QPlatformAudioSourceStream::bytesReady;

    using QPlatformAudioSourceStream::deviceIsRingbufferReader;

    using QPlatformAudioSourceStream::processedDuration;

    using QPlatformAudioSourceStream::ringbufferSizeInBytes;

    using QPlatformAudioSourceStream::setVolume;

    bool open() { return true; }

    bool start(QIODevice *);

    QIODevice *start();

    bool start(AudioCallback &&);

    void suspend();

    void resume();

    void stop(ShutdownPolicy);

    void updateStreamIdle(bool) override;

private:

    bool openAudioClient(ComPtr<IMMDevice> device);

    bool startAudioClient();

    template <typename Functor>

    bool visitAudioClientBuffer(Functor &&);

    void runProcessLoop();

    bool processRingbuffer() noexcept Q_DECL_NONBLOCKING_FUNCTION;

    bool processCallback() noexcept Q_DECL_NONBLOCKING_FUNCTION;

    void handleAudioClientError();

    void joinWorkerThread();

    ComPtr<IAudioClient3> m_audioClient;

    ComPtr<IAudioCaptureClient> m_captureClient;

    QWMF::reference_time m_periodSize;

    qsizetype m_audioClientFrames;

    std::atomic_bool m_suspended{};

    std::atomic<ShutdownPolicy> m_shutdownPolicy{ ShutdownPolicy::DiscardRingbuffer };

    QAutoResetEvent m_ringbufferDrained;

    const QUniqueWin32NullHandle m_wasapiHandle;

    std::unique_ptr<QThread> m_workerThread;

    std::optional<AudioCallback> m_audioCallback;

    QWindowsAudioSource *m_parent;

    QAudioFormat m_hostFormat;

    std::unique_ptr<std::pmr::memory_resource> m_memoryResource;

    std::unique_ptr<QWindowsResampler> m_resampler;

};

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

class QWindowsAudioSource final

    : public QPlatformAudioSourceImplementationWithCallback<QWASAPIAudioSourceStream,

                                                            QWindowsAudioSource>

    using BaseClass = QPlatformAudioSourceImplementationWithCallback<QWASAPIAudioSourceStream,

                                                                     QWindowsAudioSource>;

public:

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

    ~QWindowsAudioSource() override;

};

} // namespace QtWASAPI

QT_END_NAMESPACE

#endif