Android implementation

README.md

@@ -2,6 +2,8 @@
 
 C++ version of [openWakeWord](https://github.com/dscripka/openWakeWord).
 
+# Linux
+
 ## Build
 
 1. Download a release of the [onnxruntime](https://github.com/microsoft/onnxruntime) and extract to `lib/<arch>` where `<arch>` is `uname -m`.
@@ -18,3 +20,34 @@ arecord -r 16000 -c 1 -f S16_LE -t raw - | \
 ```
 
 You can add multiple `--model <path>` arguments. See `--help` for more options.
+
+# Android
+
+- openWakeWord-cpp path: `android/app/src/main/cpp/openWakeWord-cpp`
+- [onnxruntime-android](https://mvnrepository.com/artifact/com.microsoft.onnxruntime/onnxruntime-android) path: `android/app/src/main/cpp/onnxruntime-android`
+- models path moved from android/app/src/main/cpp/openWakeWord-cpp/models to: `android/app/src/main/assets/models`
+
+android/app/build.gradle:
+```gradle
+android {
+    defaultConfig {
+        minSdkVersion 27
+        ndk {
+            ldLibs "log"
+        }
+    }
+    externalNativeBuild {
+        cmake {
+            path "src/main/cpp/openWakeWord-cpp/src/android/CMakeLists.txt"
+        }
+    }
+```
+
+Example of Android service is in `openWakeWord-cpp/src/android/OpenWakeWordServiceExample.java`. There C++ part is defaulted end after waking, and started after manualy calling the service (intend) again.
+- Extras with `end` property end service.
+- Extras with `stop` property end cpp subprocess.
+- Extras with `keyword` property start service, or only cpp subprocess, and set wake word model path. Default is `models/alexa_v0.1.onnx`.
+    - Optional extras `sensitivity` as string value. Default is `0.5`.
+    - Optional extras `closeServiceAfterWakeWordActivation` property end android service after waking (cpp subprocess is end by hardcode). Default is `false`.
+- Don't forget to create first `NotificationChannel` in MainActivity.
+- Android destroy service automaticly after same time, that's why you must set `Worker`, which will call this service each 16 minutes.

src/android/CMakeLists.txt

@@ -0,0 +1,48 @@
+# https://mvnrepository.com/artifact/com.microsoft.onnxruntime/onnxruntime-android/1.16.3
+
+cmake_minimum_required(VERSION 3.13)
+
+project(openWakeWord C CXX)
+
+set(CMAKE_CXX_STANDARD 20)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+
+string(APPEND CMAKE_CXX_FLAGS " -Wall -Wextra -Wl,-rpath,'$ORIGIN'")
+string(APPEND CMAKE_C_FLAGS " -Wall -Wextra")
+
+
+set(CMAKE_THREAD_PREFER_PTHREAD TRUE)
+set(THREADS_PREFER_PTHREAD_FLAG TRUE)
+
+find_package(Threads REQUIRED)
+
+
+add_library(onnxruntime SHARED IMPORTED)
+set_target_properties(
+    onnxruntime
+    PROPERTIES
+    IMPORTED_LOCATION ${CMAKE_CURRENT_LIST_DIR}/../../../onnxruntime-android/jni/${ANDROID_ABI}/libonnxruntime.so
+    INTERFACE_INCLUDE_DIRECTORIES ${CMAKE_CURRENT_LIST_DIR}/../../../onnxruntime-android/headers
+)
+
+
+find_library(log-lib log)
+find_library(android-lib android)
+
+
+add_library(
+    openWakeWord
+    SHARED
+    ${CMAKE_CURRENT_LIST_DIR}/../main.cpp
+)
+
+target_link_libraries(
+    openWakeWord
+    PRIVATE
+    Threads::Threads
+    onnxruntime
+    aaudio
+    log
+    ${log-lib}
+    ${android-lib}
+)