Does nvidia dwa buffer share the same hw memory with CUDA device memory?

[user15808]

I want to using nvv4l2h265enc to encode the video. I am currently using CUDA inside the Gstreamer plugin in order to accelerate the process. However, I need to copy the memory from host to device and after device process copy it back to host. Then I need to use nvvidconv plugin to convert gstreamer buffer into nvvidia dwa buffer. Finally, I can feed the data into nvv4l2h265enc plugin.
I am wondering does CUDA divice memory and nvidia dwa buffer share the same memory address? If so, I do not need to copy over and over again. I can import CUDA device memory into nvv4l2h265enc plugin directly?

Thank you very much.

[AastaLLL]

Hi,

Just want to confirm first.
Do you mean the DMA buffer?

Thanks.

[user15808]

Yes, sorry for the typo. It’s DMA buffer.

[AastaLLL]

Hi,

Sorry for the late update.
Could you try if the following example can meet your requirement?

/usr/src/jetson_multimedia_api/samples/03_video_cuda_enc

Thanks.