Can I get inFrames[1] on Effect Plugin like on Transition Plugin?

Hi, everyone!

I hope you are going well.

I am going to make plugin with gpu accelerated. so I have checked some SDK sample plguins.

          ....

prSuiteError Render(

const PrGPUFilterRenderParams* inRenderParams,

const PPixHand* inFrames,

csSDK_size_t inFrameCount,

PPixHand* outFrame)

{

     if (inFrameCount < 2 || (!inFrames[0] && !inFrames[1]))

     {

          return suiteError_Fail;

     }

     ....

I am sure inFrame[0] and outFrame indicate same address.

I'd like to make outFrame that is related to several pixcel of inFrame.

for example: outImg[x].x( or r) = (inImg[x - 5].x + inImg[x].x) / 2;

                    outImg[x].y( or g) = (inImg[x - 4].y + inImg[x - 1].y) / 2;

                    outImg[x].z( or b) = (inImg[x - 10].z + inImg[x - 3].z) / 2; // it is not correct code.

But If I change some pixcel data on before render, it is used changed pixcel data in the next render because inFrames[0] and outFrame indicate same address.(here I used inFrames[0] for inFrame)

So, I used inFrames[1] for inFrame data.

inFrames[1] and outFrame indicated different address together and I got correct result.

But it is only when the plugin is transition plugin. I cannot get inFrames[1] if plugin is Effect plugin.

Debugging result:

----------- effect plugin -----------

     inFrameCount => 1,
     inFrames[0] => exist.     inFrames[1] => no exist.

----------- transition plugin -------

     inFrameCount => 2,

     inFrames[0] => exist.

     inFrames[1] => exist.

How can I get two frames ( inFrames[0], inFrames[1]) on Effect Plugin like on Transition Plugin?

Regards,

Igor.