qt-everywhere-src-5.15.1/qtmultimedia/src/multimedia/video/qabstractvideosurface.h

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#ifndef QABSTRACTVIDEOSURFACE_H
#define QABSTRACTVIDEOSURFACE_H

#include <QtCore/qobject.h>
#include <QtMultimedia/qvideoframe.h>

QT_BEGIN_NAMESPACE

class QRectF;
class QVideoSurfaceFormat;

class QAbstractVideoSurfacePrivate;

class Q_MULTIMEDIA_EXPORT QAbstractVideoSurface : public QObject
{
    Q_OBJECT
    Q_PROPERTY(QSize nativeResolution READ nativeResolution NOTIFY nativeResolutionChanged)
public:
    enum Error
    {
        NoError,
        UnsupportedFormatError,
        IncorrectFormatError,
        StoppedError,
        ResourceError
    };

    explicit QAbstractVideoSurface(QObject *parent = nullptr);
    ~QAbstractVideoSurface();

    virtual QList<QVideoFrame::PixelFormat> supportedPixelFormats(
            QAbstractVideoBuffer::HandleType type = QAbstractVideoBuffer::NoHandle) const = 0;
    virtual bool isFormatSupported(const QVideoSurfaceFormat &format) const;
    virtual QVideoSurfaceFormat nearestFormat(const QVideoSurfaceFormat &format) const;

    QVideoSurfaceFormat surfaceFormat() const;

    QSize nativeResolution() const;

    virtual bool start(const QVideoSurfaceFormat &format);
    virtual void stop();

    bool isActive() const;

    virtual bool present(const QVideoFrame &frame) = 0;

    Error error() const;

Q_SIGNALS:
    void activeChanged(bool active);
    void surfaceFormatChanged(const QVideoSurfaceFormat &format);
    void supportedFormatsChanged();
    void nativeResolutionChanged(const QSize &resolution);

protected:
    void setError(Error error);
    void setNativeResolution(const QSize &resolution);

private:
    Q_DECLARE_PRIVATE(QAbstractVideoSurface)
    QScopedPointer<QAbstractVideoSurfacePrivate> d_ptr;
};

#ifndef QT_NO_DEBUG_STREAM
Q_MULTIMEDIA_EXPORT QDebug operator<<(QDebug, const QAbstractVideoSurface::Error &);
#endif

QT_END_NAMESPACE

Q_DECLARE_METATYPE(QAbstractVideoSurface*)
Q_DECLARE_METATYPE(QAbstractVideoSurface::Error)

#endif