Functions

__host__ ​cudaError_t cudaGraphicsVDPAURegisterOutputSurface ( cudaGraphicsResource** resource, VdpOutputSurface vdpSurface, unsigned int  flags )

Register a VdpOutputSurface object.

Parameters

resource

- Pointer to the returned object handle

vdpSurface

- VDPAU object to be registered

flags

- Map flags

Returns

cudaSuccess, cudaErrorInvalidDevice, cudaErrorInvalidValue, cudaErrorInvalidResourceHandle, cudaErrorUnknown

Description

Registers the VdpOutputSurface specified by vdpSurface for access by CUDA. A handle to the registered object is returned as resource. The surface's intended usage is specified using flags, as follows:

• cudaGraphicsMapFlagsNone: Specifies no hints about how this resource will be used. It is therefore assumed that this resource will be read from and written to by CUDA. This is the default value.

• cudaGraphicsMapFlagsReadOnly: Specifies that CUDA will not write to this resource.

• cudaGraphicsMapFlagsWriteDiscard: Specifies that CUDA will not read from this resource and will write over the entire contents of the resource, so none of the data previously stored in the resource will be preserved.

Note:

Note that this function may also return error codes from previous, asynchronous launches.

See also:

cudaVDPAUSetVDPAUDevice, cudaGraphicsUnregisterResource, cudaGraphicsSubResourceGetMappedArray, cuGraphicsVDPAURegisterOutputSurface

__host__ ​cudaError_t cudaGraphicsVDPAURegisterVideoSurface ( cudaGraphicsResource** resource, VdpVideoSurface vdpSurface, unsigned int  flags )

Register a VdpVideoSurface object.

Parameters

resource

- Pointer to the returned object handle

vdpSurface

- VDPAU object to be registered

flags

- Map flags

Returns

cudaSuccess, cudaErrorInvalidDevice, cudaErrorInvalidValue, cudaErrorInvalidResourceHandle, cudaErrorUnknown

Description

Registers the VdpVideoSurface specified by vdpSurface for access by CUDA. A handle to the registered object is returned as resource. The surface's intended usage is specified using flags, as follows:

• cudaGraphicsMapFlagsNone: Specifies no hints about how this resource will be used. It is therefore assumed that this resource will be read from and written to by CUDA. This is the default value.

• cudaGraphicsMapFlagsReadOnly: Specifies that CUDA will not write to this resource.

• cudaGraphicsMapFlagsWriteDiscard: Specifies that CUDA will not read from this resource and will write over the entire contents of the resource, so none of the data previously stored in the resource will be preserved.

Note:

Note that this function may also return error codes from previous, asynchronous launches.

See also:

cudaVDPAUSetVDPAUDevice, cudaGraphicsUnregisterResource, cudaGraphicsSubResourceGetMappedArray, cuGraphicsVDPAURegisterVideoSurface

__host__ ​cudaError_t cudaVDPAUGetDevice ( int* device, VdpDevice vdpDevice, VdpGetProcAddress* vdpGetProcAddress )

Gets the CUDA device associated with a VdpDevice.

Parameters

device

- Returns the device associated with vdpDevice, or -1 if the device associated with vdpDevice is not a compute device.

vdpDevice

- A VdpDevice handle

vdpGetProcAddress

- VDPAU's VdpGetProcAddress function pointer

Returns

cudaSuccess

Description

Returns the CUDA device associated with a VdpDevice, if applicable.

Note:

Note that this function may also return error codes from previous, asynchronous launches.

See also:

cudaVDPAUSetVDPAUDevice, cuVDPAUGetDevice

__host__ ​cudaError_t cudaVDPAUSetVDPAUDevice ( int  device, VdpDevice vdpDevice, VdpGetProcAddress* vdpGetProcAddress )

Sets a CUDA device to use VDPAU interoperability.

Parameters

device

- Device to use for VDPAU interoperability

vdpDevice

- The VdpDevice to interoperate with

vdpGetProcAddress

- VDPAU's VdpGetProcAddress function pointer

Returns

cudaSuccess, cudaErrorInvalidDevice, cudaErrorSetOnActiveProcess

Description

Records vdpDevice as the VdpDevice for VDPAU interoperability with the CUDA device device and sets device as the current device for the calling host thread.

This function will immediately initialize the primary context on device if needed.

If device has already been initialized then this call will fail with the error cudaErrorSetOnActiveProcess. In this case it is necessary to reset device using cudaDeviceReset() before VDPAU interoperability on device may be enabled.

Note:

Note that this function may also return error codes from previous, asynchronous launches.

See also:

cudaGraphicsVDPAURegisterVideoSurface, cudaGraphicsVDPAURegisterOutputSurface, cudaDeviceReset