我正在尝试使用SDL播放视频。为此,我使用opencv加载视频并获取帧。然后,我只需要将这些帧根据需要转换为SDL_Texture*
,就可以在屏幕上绘制它们。
这是我的问题,我将其转换为SDL_Surface*
,但是转换为SDL_Texture
失败了,我不确定原因。这里是我的代码:
void Cutscene::play()
{
this->onLoop();
this->onRender();
while(!frameMat.empty())
{
this->onLoop();
this->onRender();
}
}
void Cutscene::onLoop()
{
video >> frameMat;
convertCV_MatToSDL_Texture();
}
void Cutscene::onRender()
{
Image::onDraw(GameEngine::getInstance()->getRenderer(), frameTexture);
}
void Cutscene::convertCV_MatToSDL_Texture()
{
IplImage opencvimg2 = (IplImage)frameMat;
IplImage* opencvimg = &opencvimg2;
//Convert to SDL_Surface
frameSurface = SDL_CreateRGBSurfaceFrom((void*)opencvimg->imageData,
opencvimg->width, opencvimg->height,
opencvimg->depth*opencvimg->nChannels,
opencvimg->widthStep,
0xff0000, 0x00ff00, 0x0000ff, 0);
if(frameSurface == NULL)
{
SDL_Log("Couldn't convert Mat to Surface.");
return;
}
//Convert to SDL_Texture
frameTexture = SDL_CreateTextureFromSurface(
GameEngine::getInstance()->getRenderer(), frameSurface);
if(frameTexture == NULL)
{
SDL_Log("Couldn't convert Mat(converted to surface) to Texture."); //<- ERROR!!
return;
}
//cvReleaseImage(&opencvimg);
//MEMORY LEAK?? opencvimg opencvimg2
}
我在我的项目的其他部分使用了这个函数SDL_CreateTextureFromSurface
并且它在那里可以正常工作。所以问题是:你知道我在代码中所做的转换有什么问题吗?如果不知道,有没有更好的方法来完成我想要做的事情?