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435f014d71
* Add support for sessions to share a global threadpool. * Fix build issues * Add tests, fix build issues. * Added some documentation * Fix centos issue when threadpools become nullptr due to 1 core. * Fix mac and x86 build issues * Address some PR comments * Disabled test for android, added few more tests and addressed more PR comments. * const_cast
37 lines
1.4 KiB
Markdown
37 lines
1.4 KiB
Markdown
# NNAPI Execution Provider
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[Android Neural Networks API (NNAPI)](https://developer.android.com/ndk/guides/neuralnetworks) is a unified interface to CPU, GPU, and NN accelerators on Android. It is supported by onnxruntime via [DNNLibrary](https://github.com/JDAI-CV/DNNLibrary).
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## Minimum requirements
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The NNAPI EP requires Android devices with Android 8.1 or higher.
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## Build NNAPI EP
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For build instructions, please see the [BUILD page](../../BUILD.md#Android-NNAPI).
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## Using NNAPI EP in C/C++
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To use NNAPI EP for inferencing, please register it as below.
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```
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string log_id = "Foo";
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auto logging_manager = std::make_unique<LoggingManager>
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(std::unique_ptr<ISink>{new CLogSink{}},
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static_cast<Severity>(lm_info.default_warning_level),
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false,
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LoggingManager::InstanceType::Default,
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&log_id)
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Environment::Create(std::move(logging_manager), env)
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InferenceSession session_object{so,env};
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session_object.RegisterExecutionProvider(std::make_unique<::onnxruntime::NnapiExecutionProvider>());
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status = session_object.Load(model_file_name);
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```
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The C API details are [here](../C_API.md#c-api).
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## Performance
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