qgstreameraudiodecoder_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 QGSTREAMERAUDIODECODERCONTROL_H

#define QGSTREAMERAUDIODECODERCONTROL_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 <QtMultimedia/private/qmultimediautils_p.h>

#include <QtMultimedia/private/qplatformaudiodecoder_p.h>

#include <QtMultimedia/private/qtmultimediaglobal_p.h>

#include <QtMultimedia/qaudiodecoder.h>

#include <QtCore/qobject.h>

#include <QtCore/qmutex.h>

#include <QtCore/qurl.h>

#include <QtCore/private/qexpected_p.h>

#include <common/qgst_p.h>

#include <common/qgst_bus_observer_p.h>

#include <common/qgstpipeline_p.h>

#include <gst/app/gstappsink.h>

QT_BEGIN_NAMESPACE

class QGstreamerMessage;

class QGstreamerAudioDecoder final : public QPlatformAudioDecoder, public QGstreamerBusMessageFilter

    Q_OBJECT

public:

    static q23::expected<QPlatformAudioDecoder *, QString> create(QAudioDecoder *parent);

    ~QGstreamerAudioDecoder() override;

    QUrl source() const override;

    void setSource(const QUrl &fileName) override;

    QIODevice *sourceDevice() const override;

    void setSourceDevice(QIODevice *device) override;

    void start() override;

    void stop() override;

    QAudioFormat audioFormat() const override;

    void setAudioFormat(const QAudioFormat &format) override;

    QAudioBuffer read() override;

    // GStreamerBusMessageFilter interface

    bool processBusMessage(const QGstreamerMessage &message) override;

    bool canReadQrc() const override;

private Q_SLOTS:

    void updateDuration();

private:

    explicit QGstreamerAudioDecoder(QAudioDecoder *parent);

    static GstFlowReturn new_sample(GstAppSink *sink, gpointer user_data);

    GstFlowReturn newSample(GstAppSink *sink);

    void setAudioFlags(bool wantNativeAudio);

    void addAppSink();

    void removeAppSink();

    void processInvalidMedia(QAudioDecoder::Error errorCode, const QString &errorString);

    static std::chrono::nanoseconds getPositionFromBuffer(GstBuffer *buffer);

    bool processBusMessageError(const QGstreamerMessage &);

    bool processBusMessageDuration(const QGstreamerMessage &);

    bool processBusMessageWarning(const QGstreamerMessage &);

    bool processBusMessageInfo(const QGstreamerMessage &);

    bool processBusMessageEOS(const QGstreamerMessage &);

    bool processBusMessageStateChanged(const QGstreamerMessage &);

    bool processBusMessageStreamsSelected(const QGstreamerMessage &);

    QGstPipeline m_playbin;

    QGstBin m_outputBin;

    QGstElement m_audioConvert;

    QGstAppSink m_appSink;

    QUrl mSource;

    QIODevice *mDevice = nullptr;

    QAudioFormat mFormat;

    int m_buffersAvailable = 0;

    int m_durationQueries = 0;

    qint32 m_currentSessionId{};

    QGObjectHandlerScopedConnection m_deepNotifySourceConnection;

};

QT_END_NAMESPACE

#endif // QGSTREAMERPLAYERSESSION_H