onnxruntime-nim

onnxruntime C Api wrapped for nim

• Wrapped C Api is generated using c2nim
• Onnxruntime Home Page
• Onnxruntime Github
• Header file onnxruntime_c_api.h

Install

1. Install Onnxruntime

• Go to Onnxruntime Releases
• Choose source code/compiled binaries for your system, such as the one for Linux X86_64 CPU 1.6.0
• Unzip the file, copy ./include and ./lib to the right places

For example, on Linux, you may copy ./lib to /usr/lib/x86_64-linux-gn/, and ./include/ to /usr/include/ Or just put ./include ./lib into your project; as long as you and your code know where they are.

2. Install Onnxruntime C Api for nim

nim git clone https://github.com/YesDrX/onnxruntime-nim cd onnxruntime-nim nimble install nimble install onnxruntime

3. Sample Code

• C_Api_Sample.nim is a direct translation from C_Api_Sample.cpp
• Assume you have both Onnxruntime library and Onnxruntime-nim installed

cd ./sample
nim c --run C_Api_Sample.nim

• Output

Using Onnxruntime C Api : 1.6.0
WARNING: Since openmp is enabled in this build, this API cannot be used to configure intra op num threads. Please use the openmp environment variables to control the number of threads.
Using Onnxruntime C API
Number of inputs = 1
Input 0 : name= data_0
Input 0 : type = ONNX_TENSOR_ELEMENT_DATA_TYPE_FLOAT
Input 0 : num_dims = 4
Input 0 : dim 0 = 1
Input 0 : dim 1 = 3
Input 0 : dim 2 = 224
Input 0 : dim 3 = 224
[Class 0] :  0.000045
[Class 1] :  0.003846
[Class 2] :  0.000125
[Class 3] :  0.001180
[Class 4] :  0.001317
Done!

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