GstHwFrameTexturesBase.h

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#pragma once
 
#include <QtMultimedia/QVideoFrame>
#include <gst/gst.h>
#include <memory>
#include <private/qhwvideobuffer_p.h>
 
#include "GstHwVideoBuffer.h"
#include "GstHwVideoBufferFactory.h"
 
class QRhiTexture;
 
class GstHwFrameTexturesBase : public QVideoFrameTextures
{
public:
    ~GstHwFrameTexturesBase() override { g_clear_pointer(&_srcSample, gst_sample_unref); }
 
    void onFrameEndInvoked() override { g_clear_pointer(&_srcSample, gst_sample_unref); }
 
    QRhiTexture* texture(uint plane) const override { return int(plane) < _count ? _textures[plane].get() : nullptr; }
 
    virtual HwVideoBufferPath sourcePath() const { return HwVideoBufferPath::None; }
 
    void setSourceSample(GstSample* s) noexcept
    {
        g_clear_pointer(&_srcSample, gst_sample_unref);
        _srcSample = s;
    }
 
    template <class FT>
    static FT* reusableBundle(QVideoFrameTexturesUPtr& old, HwVideoBufferPath p)
    {
        auto* base = old ? dynamic_cast<GstHwFrameTexturesBase*>(old.get()) : nullptr;
        return (base && base->sourcePath() == p) ? dynamic_cast<FT*>(base) : nullptr;
    }
 
protected:
    int _count = 0;
    std::unique_ptr<QRhiTexture> _textures[GstHw::kMaxPlanes];
    GstSample* _srcSample = nullptr;
};