qgstappsrc_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 QGSTAPPSRC_H
#define QGSTAPPSRC_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/qtmultimediaglobal_p.h>
#include <private/qmultimediautils_p.h>
#include <qaudioformat.h>
 
#include <QtCore/qobject.h>
#include <QtCore/qiodevice.h>
#include <QtCore/private/qringbuffer_p.h>
#include <QtCore/qatomic.h>
 
#include <qgst_p.h>
#include <gst/app/gstappsrc.h>
 
QT_BEGIN_NAMESPACE
 
class QNetworkReply;
 
class Q_MULTIMEDIA_EXPORT QGstAppSrc  : public QObject
{
    Q_OBJECT
public:
    static QMaybe<QGstAppSrc *> create(QObject *parent = nullptr);
    ~QGstAppSrc();
 
    bool setup(QIODevice *stream = nullptr, qint64 offset = 0);
    void setAudioFormat(const QAudioFormat &f);
 
    void setExternalAppSrc(const QGstElement &appsrc);
    QGstElement element();
 
    void write(const char *data, qsizetype size);
 
    bool canAcceptMoreData() { return m_noMoreData || m_dataRequestSize != 0; }
 
    void suspend() { m_suspended = true; }
    void resume() { m_suspended = false; m_noMoreData = true; }
 
Q_SIGNALS:
    void bytesProcessed(int bytes);
    void noMoreData();
 
private Q_SLOTS:
    void pushData();
    bool doSeek(qint64);
    void onDataReady();
 
    void streamDestroyed();
private:
    QGstAppSrc(QGstElement appsrc, QObject *parent);
 
    bool setStream(QIODevice *, qint64 offset);
    bool isStreamValid() const
    {
        return m_stream != nullptr && m_stream->isOpen();
    }
 
    static gboolean on_seek_data(GstAppSrc *element, guint64 arg0, gpointer userdata);
    static void on_enough_data(GstAppSrc *element, gpointer userdata);
    static void on_need_data(GstAppSrc *element, uint arg0, gpointer userdata);
 
    void sendEOS();
    void eosOrIdle();
 
    QIODevice *m_stream = nullptr;
    QNetworkReply *m_networkReply = nullptr;
    QRingBuffer m_buffer;
    QAudioFormat m_format;
 
    QGstElement m_appSrc;
    bool m_sequential = true;
    bool m_suspended = false;
    bool m_noMoreData = false;
    GstAppStreamType m_streamType = GST_APP_STREAM_TYPE_RANDOM_ACCESS;
    qint64 m_offset = 0;
    qint64 m_maxBytes = 0;
    qint64 bytesReadSoFar = 0;
    QAtomicInteger<unsigned int> m_dataRequestSize = 0;
    int streamedSamples = 0;
};
 
QT_END_NAMESPACE
 
#endif