我在哪里可以获得IID_IDirect3DDeviceManager9接口？

问题描述

你能告诉我让IDirect3DDeviceManager9接口使用DXVA设置视频解码器的步骤吗？

I使用MFTEnumEx方法获取H.264视频的视频解码器变换接口（IMFTransform）。 之后，我尝试从此IMFTransform接口获取属性并检查MF_SA_D3D_AWARE设置。

IMFAttributes * pAttributes = NULL ; $
hr = decoder-> GetAttributes（& pAttributes）;

if（MFGetAttributeUINT32（pAttributes，MF_SA_D3D_AWARE，false））

  ;  hr = pAttributes-> SetUINT32（CODECAPI_AVDecVideoAcceleration_H264，TRUE）;

作为进一步的步骤，我想我需要IID_IDirect3DDeviceManager9接口。这是正确的，我从哪里获得IID_IDirect3DDeviceManager9接口？在其他示例中，在我看来，ProcessMessage调用将设置这样的接口。但我
还没有将IMFTransform接口子类化。这是否需要建立DXVA解码器？  

IDirect3DDeviceManager9 * manager = nullptr;

HRESULT hr = decoder-> ProcessMessage（MFT_MESSAGE_SET_D3D_MANAGER ，

       reinterpret_cast< ULONG_PTR>（经理））;

hr = decoder-> QueryInterface（IID_IDirect3DDeviceManager9，（void **）& manager）;

最后一次调用失败并返回代码，不支持此类接口。

最好的问候

saoirse

解决方案

Hi,

could you tell me the steps to get the IDirect3DDeviceManager9 interface to setup the video decoder using DXVA?

I use the MFTEnumEx method to get the video decoder transform interface (IMFTransform) for H.264 videos.  After that I try to get the attributes from this IMFTransform interface and check the MF_SA_D3D_AWARE setting.

IMFAttributes* pAttributes = NULL;
hr = decoder->GetAttributes (&pAttributes);
if (MFGetAttributeUINT32 (pAttributes, MF_SA_D3D_AWARE, false))
   hr = pAttributes->SetUINT32 (CODECAPI_AVDecVideoAcceleration_H264, TRUE);

As a further step, I think I need the IID_IDirect3DDeviceManager9 interface. Is this correct and where do I get the IID_IDirect3DDeviceManager9 interface? In other examples, it seems to me that the ProcessMessage call will setup such an interface. But I have not subclassed the IMFTransform interface. Is this necessary to establish a DXVA decoder?  

IDirect3DDeviceManager9* manager = nullptr;

HRESULT hr = decoder->ProcessMessage (MFT_MESSAGE_SET_D3D_MANAGER,
        reinterpret_cast<ULONG_PTR>(manager));

hr = decoder->QueryInterface (IID_IDirect3DDeviceManager9, (void **)&manager);

The last call fails with the return code, that no such interface is supported.

best regards

saoirse

解决方案

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