Updated : Jan 29, 2020 in Personal Growth


Integral. Given an input image $pSrc$ and the specified value $nVal$, the pixel value of the integral image $pDst$ at coordinate (i, j) will be computed as. NVIDIA continuously works to improve all of our CUDA libraries. NPP is a particularly large library, with + functions to maintain. We have a realistic goal of. Name, cuda-npp. Version, Summary. Description, CUDA package cuda-npp. Section, base. License, Proprietary. Homepage. Recipe file.

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It also allows the user the maximum flexibility regarding which of the various memory transfer mechanisms offered by the CUDA runtime is used, e. The most basic steps involved in using NPP for processing data is mpp follows: So far the only response I got was to send in a feature request for Nvidia to cudx the new functions, which I’ve done.

When you roll your own, you can use all the assumptions specific to your situation to speed things up. Further does it say: That is that all pointer arguments in those APIs are device pointers. The replacements cannot be found in either CUDA 7. This list of sub-libraries is as follows: Stack Overflow works best with JavaScript enabled. By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies.

It does so by using the following scaling formula to select source pixels for interpolation: This convention enables the individual developer to make smart choices about memory management that minimize the number of memory transfers.


Each picture cudx the name of the algorithm, an encoder setting and the resulting file size of the video. My guess here is that it should be 0. It also allows developers who invoke the same primitive repeatedly to allocate the scratch only once, improving performance and potential device-memory fragmentation.

NVIDIA Performance Primitives

According to their documentation: As an aside, I don’t think any library can ever be “fully optimized”. The current release is IPP v9. Because of this fixed-point nature of the representation many numerical operations e. All NPP functions should be thread safe except for the following functions:.

Since NPP is a C API and therefore does not allow for function overloading for different data-types the NPP naming convention addresses the need to differentiate between different flavors of the same algorithm or primitive function but for various data types.

It’s an upstream bug, and it still gets the job done, just not with the correct scaling type. I’d like to wait for a response by Nvidia. Sign up or log in Sign up using Google. These allow to specify filter matrices, which I interpret as a cudda of quality improvement and a confession on the poor quality of the ResizeSqrPixel? For this reason it is recommended that cudaDeviceSynchronize or at least cudaStreamSynchronize be called before making an nppSetStream call to change to a new stream ID.

This integer data is usually a fixed point fractional representation of some physical nlp e.

It’s then better to give users a “heads up” by declaring it as deprecated, not to make it a secret, and to hope it’s going to change in the future. Cuca is my hope to get a response from them and telling me FFmpeg is doing it wrong and how to do it right, which means it can be fixed easily.


Last modified 2 years ago. One can always undeclare it. Similarly signal-processing primitives are prefixed with “npps”. I tested on 4 types of images and 2 different sizes.

To minimize library loading and CUDA runtime startup times it is recommended to use the static library s whenever possible. You’ll have to complain to Nvidia about that.

# (filter “scale_npp” fails to select correct algorithm (Nvidia CUDA/NPP scaler)) – FFmpeg

The result would be clamped to be I personally like ArrayFire’s np processing selection and have found it to be fast, accelereyes. It isn’t hard to beat standard sorting methods, if you know a lot about your data and are willing to bake those assumptions into the code. If the shift is 0. With a large library to support on a large and growing hardware base, the work to optimize it is never done!

If it turns out to be with Nvidia then who knows when or if this gets fixed. By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms chda Service. All the code in ffmpeg does it passing the interpolation-method on to libnpp.

After getting some info from the Nvidia forums and further reading is this the situation as it presents itself to me: Some primitives of NPP require additional device memory buffers scratch buffers for calculations, e.