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hello-neon

README.md

Hello Neon

Hello Neon is an Android sample that uses ARM NEON for fir filter implementation:

  • identify NEON files in source tree, they would be just normal c/c++ source files
  • append -mfpu=neon to CMake compile flag for neon source files. This is different from android.mk, in that:
  • *.c.neon is fake file name; cmake does not need that mechanism
  • cmake scripts does not need the fake *.neon name since cmake scripts could handle it directly

If there are lot of NEON files in the project, make a NEON lib:

  • turn NEON compile flags for the lib
  • let the rest of the project use the NEON libs (this approach is not shown)

This sample uses the new Android Studio CMake plugin with C++ support.

Pre-requisites

  • Android Studio 2.2+ with NDK bundle.

Getting Started

  1. Download Android Studio
  2. Launch Android Studio.
  3. Open the sample directory.
  4. Open File/Project Structure...
  • Click Download or Select NDK location.
  1. Click Tools/Android/Sync Project with Gradle Files.
  2. Click Run/Run 'app'.

Screenshots

screenshot

Support

If you've found an error in these samples, please file an issue.

Patches are encouraged, and may be submitted by forking this project and submitting a pull request through GitHub. Please see CONTRIBUTING.md for more details.

License

Copyright 2015 Google, Inc.

Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE file distributed with this work for additional information regarding copyright ownership. The ASF licenses this file to you under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.