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11. XTexture和GLVideoView的线程安全和清理函数编写~1

发布时间：2021-06-13 19:50:01编辑：雪饮阅读（）

 同樣的爲了實現綫程安全，這次輪到XTexture和GLVideoView了。

首先在cpp/GLVideoView.cpp中實現：
#include "GLVideoView.h"
#include "XTexture.h"
#include "XLog.h"
void GLVideoView::SetRender(void *win)
{
    view = win;
}
void GLVideoView::Close()
{
    mux.lock();
    if(txt)
    {
        txt->Drop();
        txt = 0;
    }

    mux.unlock();
}
void GLVideoView::Render(XData data)
{

    if(!view) return;
    if(!txt)
    {
        txt = XTexture::Create();

        txt->Init(view,(XTextureType)data.format);
    }
    txt->Draw(data.datas,data.width,data.height);
}
然後在cpp/GLVideoView.h中聲明：

#ifndef XPLAY_GLVIDEOVIEW_H
#define XPLAY_GLVIDEOVIEW_H


#include "XData.h"
#include "IVideoView.h"

class XTexture;

class GLVideoView: public IVideoView {
public:
    virtual void SetRender(void *win);
    virtual void Render(XData data);
    virtual void Close();
protected:
    void *view = 0;
    XTexture *txt = 0;
    std::mutex mux;
};


#endif //XPLAY_GLVIDEOVIEW_H

然後cpp/XTexture.cpp中實現是差不多的： #include "XTexture.h"
#include "XLog.h"
#include "XEGL.h"
#include "XShader.h"

class CXTexture:public XTexture
{
public:
    XShader sh;
    XTextureType type;
    std::mutex mux;
    virtual void Drop()
    {
        mux.lock();
        XEGL::Get()->Close();
        sh.Close();
        mux.unlock();
        delete this;
    }
    virtual bool Init(void *win,XTextureType type)
    {
        mux.lock();
        XEGL::Get()->Close();
        sh.Close();
        this->type = type;
        if(!win)
        {
            mux.unlock();
            XLOGE("XTexture Init failed win is NULL");
            return false;
        }
        if(!XEGL::Get()->Init(win))
        {
            mux.unlock();
            return false;
        }
        sh.Init((XShaderType)type);
        mux.unlock();
        return true;
    }
    virtual void Draw(unsigned char *data[],int width,int height)
    {
        mux.lock();
        sh.GetTexture(0,width,height,data[0]); // Y

        if(type == XTEXTURE_YUV420P)
        {
            sh.GetTexture(1,width/2,height/2,data[1]); // U
            sh.GetTexture(2,width/2,height/2,data[2]); // V
        }
        else
        {
            sh.GetTexture(1,width/2,height/2,data[1], true); // UV
        }
        sh.Draw();
        XEGL::Get()->Draw();
        mux.unlock();
    }

};

XTexture *XTexture::Create()
{
    return new CXTexture();
}

同樣的在cpp/XTexture.h中聲明： #ifndef XPLAY_XTEXTURE_H
#define XPLAY_XTEXTURE_H
enum XTextureType
{
    XTEXTURE_YUV420P = 0, // Y 4 u 1 v 1
    XTEXTURE_NV12 = 25,    // Y4   uv1
    XTEXTURE_NV21 = 26     // Y4   vu1

};

class XTexture
{
public:
    static XTexture *Create();
    virtual bool Init(void *win,XTextureType type=XTEXTURE_YUV420P) = 0;
    virtual void Draw(unsigned char *data[],int width,int height) = 0;
    virtual void Drop() = 0;
    virtual ~XTexture(){};
protected:
    XTexture(){};
};


#endif //XPLAY_XTEXTURE_H

沒有問題呢