Move dead submodules in-tree

Signed-off-by: swurl <swurl@swurl.xyz>

externals/oboe/samples/minimaloboe/.gitignore

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+/build

externals/oboe/samples/minimaloboe/README.md

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+# Minimal Oboe
+
+## Overview
+
+This app is a very simple demonstration of turning on audio from buttons.
+It uses a low-latency Oboe stream.
+
+## Implementation
+
+The app is written using Kotlin and Jetpack Compose.
+
+The app state is maintained by subclassing DefaultLifecycleObserver.
+Oboe is called through an external native function.
+
+This app uses shared_ptr for passing callbacks to Oboe.
+When the stream is disconnected, it starts a new stream.
+
+## Screenshots
+![minimaloboe-screenshot](minimaloboe-screenshot.png)

externals/oboe/samples/minimaloboe/build.gradle

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+plugins {
+    id 'com.android.application'
+    id 'org.jetbrains.kotlin.android'
+    id 'org.jetbrains.kotlin.plugin.compose'
+}
+
+android {
+    defaultConfig {
+        applicationId "com.example.minimaloboe"
+        minSdkVersion 21
+        targetSdkVersion 35
+        compileSdkVersion 35
+        versionCode 1
+        versionName "1.0"
+
+        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
+        vectorDrawables {
+            useSupportLibrary true
+        }
+    }
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
+        }
+    }
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_18
+        targetCompatibility JavaVersion.VERSION_18
+    }
+    kotlinOptions {
+        jvmTarget = '18'
+    }
+    buildFeatures {
+        compose true
+    }
+    composeOptions {
+        kotlinCompilerExtensionVersion compose_version
+    }
+
+    externalNativeBuild {
+        cmake {
+            path 'src/main/cpp/CMakeLists.txt'
+        }
+    }
+    packagingOptions {
+        resources {
+            excludes += '/META-INF/{AL2.0,LGPL2.1}'
+        }
+    }
+    namespace 'com.example.minimaloboe'
+}
+
+dependencies {
+    implementation "androidx.core:core-ktx:$core_version"
+    implementation "org.jetbrains.kotlinx:kotlinx-coroutines-core:1.10.1"
+    implementation "org.jetbrains.kotlinx:kotlinx-coroutines-android:1.10.1"
+    implementation "androidx.activity:activity-ktx:1.10.1"
+    implementation "androidx.lifecycle:lifecycle-process:$lifecycle_version"
+    implementation "androidx.lifecycle:lifecycle-viewmodel:$lifecycle_version"
+    implementation "androidx.lifecycle:lifecycle-viewmodel-compose:$lifecycle_version"
+    implementation "androidx.lifecycle:lifecycle-viewmodel-ktx:$lifecycle_version"
+    implementation "androidx.lifecycle:lifecycle-runtime-compose:$lifecycle_version"
+    implementation "androidx.compose.ui:ui:$compose_version"
+    implementation "androidx.compose.material:material:$compose_version"
+    implementation "androidx.compose.ui:ui-tooling-preview:$compose_version"
+    implementation 'androidx.activity:activity-compose:1.10.1'
+    implementation 'androidx.appcompat:appcompat:1.7.0'
+    testImplementation 'junit:junit:4.13.2'
+    androidTestImplementation 'androidx.test.ext:junit:1.2.1'
+    androidTestImplementation 'androidx.test.espresso:espresso-core:3.6.1'
+    androidTestImplementation "androidx.compose.ui:ui-test-junit4:$compose_version"
+    debugImplementation "androidx.compose.ui:ui-tooling:$compose_version"
+    debugImplementation "androidx.compose.ui:ui-test-manifest:$compose_version"
+}

externals/oboe/samples/minimaloboe/proguard-rules.pro

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+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile

externals/oboe/samples/minimaloboe/src/main/AndroidManifest.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android">
+
+    <application
+        android:allowBackup="true"
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        android:roundIcon="@mipmap/ic_launcher_round"
+        android:supportsRtl="true"
+        android:theme="@style/Theme.Samples">
+        <activity
+            android:name=".MainActivity"
+            android:exported="true"
+            android:label="@string/app_name"
+            android:theme="@style/Theme.Samples">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
+
+</manifest>

externals/oboe/samples/minimaloboe/src/main/cpp/CMakeLists.txt

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+#
+# Copyright 2022 The Android Open Source Project
+#
+# Licensed 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.
+#
+
+cmake_minimum_required(VERSION 3.4.1)
+
+# Set the path to the Oboe library directory
+set (OBOE_DIR ../../../../../)
+#message("OBOE_DIR = " + ${OBOE_DIR})
+
+add_subdirectory(${OBOE_DIR} ./oboe-bin)
+
+# include folders
+include_directories(
+        ${OBOE_DIR}/include
+        ${CMAKE_CURRENT_LIST_DIR}
+)
+
+# App specific sources
+set (APP_SOURCES
+        SimpleNoiseMaker.cpp
+        MinimalOboeJNI.cpp
+        )
+
+# Build the minimaloboe (native) library
+add_library(minimaloboe SHARED
+        ${APP_SOURCES}
+        )
+
+# Enable optimization flags: if having problems with source level debugging,
+# disable -Ofast ( and debug ), re-enable after done debugging.
+target_compile_options(minimaloboe PRIVATE -Wall -Werror "$<$<CONFIG:RELEASE>:-Ofast>")
+
+target_link_libraries( # Specifies the target library.
+        minimaloboe
+        oboe
+
+        # Links the target library to the log library
+        # included in the NDK.
+        log)
+target_link_options(minimaloboe PRIVATE "-Wl,-z,max-page-size=16384")

externals/oboe/samples/minimaloboe/src/main/cpp/MinimalOboeJNI.cpp

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+/*
+ * Copyright 2022 The Android Open Source Project
+ *
+ * Licensed 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.
+ */
+
+#include <jni.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+static const char *TAG = "MinimalOboeJNI";
+
+#include <android/log.h>
+
+#include <SimpleNoiseMaker.h>
+
+// JNI functions are "C" calling convention
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+using namespace oboe;
+
+// Use a static object so we don't have to worry about it getting deleted at the wrong time.
+static SimpleNoiseMaker sPlayer;
+
+/**
+ * Native (JNI) implementation of AudioPlayer.startAudiostreamNative()
+ */
+JNIEXPORT jint JNICALL Java_com_example_minimaloboe_AudioPlayer_startAudioStreamNative(
+        JNIEnv * /* env */, jobject) {
+    __android_log_print(ANDROID_LOG_INFO, TAG, "%s", __func__);
+    Result result = sPlayer.open();
+    if (result == Result::OK) {
+        result = sPlayer.start();
+    }
+    return (jint) result;
+}
+
+/**
+ * Native (JNI) implementation of AudioPlayer.stopAudioStreamNative()
+ */
+JNIEXPORT jint JNICALL Java_com_example_minimaloboe_AudioPlayer_stopAudioStreamNative(
+        JNIEnv * /* env */, jobject) {
+    __android_log_print(ANDROID_LOG_INFO, TAG, "%s", __func__);
+    // We need to close() even if the stop() fails because we need to delete the resources.
+    Result result1 = sPlayer.stop();
+    Result result2 = sPlayer.close();
+    // Return first failure code.
+    return (jint) ((result1 != Result::OK) ? result1 : result2);
+}
+#ifdef __cplusplus
+}
+#endif

externals/oboe/samples/minimaloboe/src/main/cpp/SimpleNoiseMaker.cpp

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+/*
+ * Copyright 2022 The Android Open Source Project
+ *
+ * Licensed 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.
+ */
+
+#include <stdlib.h>
+
+static const char *TAG = "SimpleNoiseMaker";
+
+#include <android/log.h>
+
+#include <SimpleNoiseMaker.h>
+
+using namespace oboe;
+
+oboe::Result SimpleNoiseMaker::open() {
+    // Use shared_ptr to prevent use of a deleted callback.
+    mDataCallback = std::make_shared<MyDataCallback>();
+    mErrorCallback = std::make_shared<MyErrorCallback>(this);
+
+    AudioStreamBuilder builder;
+    oboe::Result result = builder.setSharingMode(oboe::SharingMode::Exclusive)
+            ->setPerformanceMode(oboe::PerformanceMode::LowLatency)
+            ->setFormat(oboe::AudioFormat::Float)
+            ->setChannelCount(kChannelCount)
+            ->setDataCallback(mDataCallback)
+            ->setErrorCallback(mErrorCallback)
+                    // Open using a shared_ptr.
+            ->openStream(mStream);
+    return result;
+}
+
+oboe::Result SimpleNoiseMaker::start() {
+    return mStream->requestStart();
+}
+
+oboe::Result SimpleNoiseMaker::stop() {
+    return mStream->requestStop();
+}
+
+oboe::Result SimpleNoiseMaker::close() {
+    return mStream->close();
+}
+
+/**
+ * This callback method will be called from a high priority audio thread.
+ * It should only do math and not do any blocking operations like
+ * reading or writing files, memory allocation, or networking.
+ * @param audioStream
+ * @param audioData pointer to an array of samples to be filled
+ * @param numFrames number of frames needed
+ * @return
+ */
+DataCallbackResult SimpleNoiseMaker::MyDataCallback::onAudioReady(
+        AudioStream *audioStream,
+        void *audioData,
+        int32_t numFrames) {
+    // We requested float when we built the stream.
+    float *output = (float *) audioData;
+    // Fill buffer with random numbers to create "white noise".
+    int numSamples = numFrames * kChannelCount;
+    for (int i = 0; i < numSamples; i++) {
+        // drand48() returns a random number between 0.0 and 1.0.
+        // Center and scale it to a reasonable value.
+        *output++ = (float) ((drand48() - 0.5) * 0.6);
+    }
+    return oboe::DataCallbackResult::Continue;
+}
+
+void SimpleNoiseMaker::MyErrorCallback::onErrorAfterClose(oboe::AudioStream *oboeStream,
+                                                          oboe::Result error) {
+    __android_log_print(ANDROID_LOG_INFO, TAG,
+                        "%s() - error = %s",
+                        __func__,
+                        oboe::convertToText(error)
+    );
+    // Try to open and start a new stream after a disconnect.
+    if (mParent->open() == Result::OK) {
+        mParent->start();
+    }
+}

externals/oboe/samples/minimaloboe/src/main/cpp/SimpleNoiseMaker.h

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+/*
+ * Copyright 2022 The Android Open Source Project
+ *
+ * Licensed 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.
+ */
+
+#ifndef SIMPLE_NOISE_MAKER_H
+#define SIMPLE_NOISE_MAKER_H
+
+#include "oboe/Oboe.h"
+
+/**
+ * Play white noise using Oboe.
+ */
+class SimpleNoiseMaker {
+public:
+
+    /**
+     * Open an Oboe stream.
+     * @return OK or negative error code.
+     */
+    oboe::Result open();
+
+    oboe::Result start();
+
+    oboe::Result stop();
+
+    oboe::Result close();
+
+private:
+
+    class MyDataCallback : public oboe::AudioStreamDataCallback {
+    public:
+        oboe::DataCallbackResult onAudioReady(
+                oboe::AudioStream *audioStream,
+                void *audioData,
+                int32_t numFrames) override;
+
+    };
+
+    class MyErrorCallback : public oboe::AudioStreamErrorCallback {
+    public:
+        MyErrorCallback(SimpleNoiseMaker *parent) : mParent(parent) {}
+
+        virtual ~MyErrorCallback() {
+        }
+
+        void onErrorAfterClose(oboe::AudioStream *oboeStream, oboe::Result error) override;
+
+    private:
+        SimpleNoiseMaker *mParent;
+    };
+
+    std::shared_ptr<oboe::AudioStream> mStream;
+    std::shared_ptr<MyDataCallback> mDataCallback;
+    std::shared_ptr<MyErrorCallback> mErrorCallback;
+
+    static constexpr int kChannelCount = 2;
+};
+
+#endif //SIMPLE_NOISE_MAKER_H

externals/oboe/samples/minimaloboe/src/main/kotlin/com/example/minimaloboe/AudioPlayer.kt

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+/*
+ * Copyright 2022 The Android Open Source Project
+ *
+ * Licensed 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.
+ */
+
+package com.example.minimaloboe
+
+import androidx.lifecycle.DefaultLifecycleObserver
+import androidx.lifecycle.LifecycleOwner
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.Job
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.asStateFlow
+import kotlinx.coroutines.flow.update
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.plus
+
+object AudioPlayer : DefaultLifecycleObserver {
+
+    // Create a coroutine scope which we can launch coroutines from. This way, if our
+    // player is ever destroyed (for example, if it was no longer a singleton and had multiple
+    // instances) any jobs would also be cancelled.
+    private val coroutineScope = CoroutineScope(Dispatchers.Default) + Job()
+    private var _playerState = MutableStateFlow<PlayerState>(PlayerState.NoResultYet)
+    val playerState = _playerState.asStateFlow()
+
+    init {
+        // Load the library containing the native code including the JNI functions.
+        System.loadLibrary("minimaloboe")
+    }
+
+    fun setPlaybackEnabled(isEnabled: Boolean) {
+        // Start (and stop) Oboe from a coroutine in case it blocks for too long.
+        // If the AudioServer has died it may take several seconds to recover.
+        // That can cause an ANR if we are starting audio from the main UI thread.
+        coroutineScope.launch {
+
+            val result = if (isEnabled) {
+                startAudioStreamNative()
+            } else {
+                stopAudioStreamNative()
+            }
+
+            val newUiState = if (result == 0) {
+                if (isEnabled){
+                    PlayerState.Started
+                } else {
+                    PlayerState.Stopped
+                }
+            } else {
+                PlayerState.Unknown(result)
+            }
+
+            _playerState.update { newUiState }
+        }
+    }
+
+    override fun onStop(owner: LifecycleOwner) {
+        setPlaybackEnabled(false)
+        super.onStop(owner)
+    }
+
+    private external fun startAudioStreamNative(): Int
+    private external fun stopAudioStreamNative(): Int
+}
+
+sealed interface PlayerState {
+    object NoResultYet : PlayerState
+    object Started : PlayerState
+    object Stopped : PlayerState
+    data class Unknown(val resultCode: Int) : PlayerState
+}

externals/oboe/samples/minimaloboe/src/main/kotlin/com/example/minimaloboe/MainActivity.kt

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+/*
+ * Copyright 2022 The Android Open Source Project
+ *
+ * Licensed 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.
+ */
+
+package com.example.minimaloboe
+
+import android.os.Bundle
+import androidx.activity.ComponentActivity
+import androidx.activity.compose.setContent
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.material.Button
+import androidx.compose.material.MaterialTheme
+import androidx.compose.material.Surface
+import androidx.compose.material.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.tooling.preview.Preview
+import androidx.lifecycle.ProcessLifecycleOwner
+import androidx.lifecycle.compose.collectAsStateWithLifecycle
+import com.example.minimaloboe.ui.theme.SamplesTheme
+
+class MainActivity : ComponentActivity() {
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+
+        // Let our AudioPlayer observe lifecycle events for the application so when it goes into the
+        // background we can stop audio playback.
+        ProcessLifecycleOwner.get().lifecycle.addObserver(AudioPlayer)
+
+        setContent {
+            SamplesTheme {
+                // A surface container using the 'background' color from the theme
+                Surface(
+                    modifier = Modifier.fillMaxSize(),
+                    color = MaterialTheme.colors.background
+                ) {
+                    MainControls()
+                }
+            }
+        }
+    }
+}
+
+@Composable
+fun MainControls() {
+    val playerState by AudioPlayer.playerState.collectAsStateWithLifecycle()
+    MainControls(playerState, AudioPlayer::setPlaybackEnabled)
+}
+
+@Composable
+fun MainControls(playerState: PlayerState, setPlaybackEnabled: (Boolean) -> Unit) {
+
+    Column {
+        val isPlaying = playerState is PlayerState.Started
+        Text(text = "Minimal Oboe!")
+        Row {
+            Button(
+                onClick = { setPlaybackEnabled(true) },
+                enabled = !isPlaying
+            ) {
+                Text(text = "Start Audio")
+            }
+            Button(
+                onClick = { setPlaybackEnabled(false) },
+                enabled = isPlaying
+            ) {
+                Text(text = "Stop Audio")
+            }
+        }
+
+        // Create a status message for displaying the current playback state.
+        val uiStatusMessage = "Current status: " +
+                when (playerState) {
+                    PlayerState.NoResultYet -> "No result yet"
+                    PlayerState.Started -> "Started"
+                    PlayerState.Stopped -> "Stopped"
+                    is PlayerState.Unknown -> {
+                        "Unknown. Result = " + playerState.resultCode
+                    }
+                }
+        Text(uiStatusMessage)
+    }
+}
+
+@Preview(showBackground = true)
+@Composable
+fun DefaultPreview() {
+    SamplesTheme {
+        MainControls(PlayerState.Started) { }
+    }
+}

externals/oboe/samples/minimaloboe/src/main/kotlin/com/example/minimaloboe/ui/theme/Color.kt

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+package com.example.minimaloboe.ui.theme
+
+import androidx.compose.ui.graphics.Color
+
+val Purple200 = Color(0xFFBB86FC)
+val Purple500 = Color(0xFF6200EE)
+val Purple700 = Color(0xFF3700B3)
+val Teal200 = Color(0xFF03DAC5)

externals/oboe/samples/minimaloboe/src/main/kotlin/com/example/minimaloboe/ui/theme/Shape.kt

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+package com.example.minimaloboe.ui.theme
+
+import androidx.compose.foundation.shape.RoundedCornerShape
+import androidx.compose.material.Shapes
+import androidx.compose.ui.unit.dp
+
+val Shapes = Shapes(
+    small = RoundedCornerShape(4.dp),
+    medium = RoundedCornerShape(4.dp),
+    large = RoundedCornerShape(0.dp)
+)

externals/oboe/samples/minimaloboe/src/main/kotlin/com/example/minimaloboe/ui/theme/Theme.kt

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+package com.example.minimaloboe.ui.theme
+
+import androidx.compose.foundation.isSystemInDarkTheme
+import androidx.compose.material.MaterialTheme
+import androidx.compose.material.darkColors
+import androidx.compose.material.lightColors
+import androidx.compose.runtime.Composable
+
+private val DarkColorPalette = darkColors(
+    primary = Purple200,
+    primaryVariant = Purple700,
+    secondary = Teal200
+)
+
+private val LightColorPalette = lightColors(
+    primary = Purple500,
+    primaryVariant = Purple700,
+    secondary = Teal200
+
+    /* Other default colors to override
+    background = Color.White,
+    surface = Color.White,
+    onPrimary = Color.White,
+    onSecondary = Color.Black,
+    onBackground = Color.Black,
+    onSurface = Color.Black,
+    */
+)
+
+@Composable
+fun SamplesTheme(darkTheme: Boolean = isSystemInDarkTheme(), content: @Composable () -> Unit) {
+    val colors = if (darkTheme) {
+        DarkColorPalette
+    } else {
+        LightColorPalette
+    }
+
+    MaterialTheme(
+        colors = colors,
+        typography = Typography,
+        shapes = Shapes,
+        content = content
+    )
+}

externals/oboe/samples/minimaloboe/src/main/kotlin/com/example/minimaloboe/ui/theme/Type.kt

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+package com.example.minimaloboe.ui.theme
+
+import androidx.compose.material.Typography
+import androidx.compose.ui.text.TextStyle
+import androidx.compose.ui.text.font.FontFamily
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.unit.sp
+
+// Set of Material typography styles to start with
+val Typography = Typography(
+    body1 = TextStyle(
+        fontFamily = FontFamily.Default,
+        fontWeight = FontWeight.Normal,
+        fontSize = 24.sp
+    ),
+    button = TextStyle(
+        fontFamily = FontFamily.Default,
+        fontWeight = FontWeight.W500,
+        fontSize = 20.sp
+    )
+)

externals/oboe/samples/minimaloboe/src/main/res/drawable-v24/ic_launcher_foreground.xml

@@ -0,0 +1,30 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:aapt="http://schemas.android.com/aapt"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportWidth="108"
+    android:viewportHeight="108">
+    <path android:pathData="M31,63.928c0,0 6.4,-11 12.1,-13.1c7.2,-2.6 26,-1.4 26,-1.4l38.1,38.1L107,108.928l-32,-1L31,63.928z">
+        <aapt:attr name="android:fillColor">
+            <gradient
+                android:endX="85.84757"
+                android:endY="92.4963"
+                android:startX="42.9492"
+                android:startY="49.59793"
+                android:type="linear">
+                <item
+                    android:color="#44000000"
+                    android:offset="0.0" />
+                <item
+                    android:color="#00000000"
+                    android:offset="1.0" />
+            </gradient>
+        </aapt:attr>
+    </path>
+    <path
+        android:fillColor="#FFFFFF"
+        android:fillType="nonZero"
+        android:pathData="M65.3,45.828l3.8,-6.6c0.2,-0.4 0.1,-0.9 -0.3,-1.1c-0.4,-0.2 -0.9,-0.1 -1.1,0.3l-3.9,6.7c-6.3,-2.8 -13.4,-2.8 -19.7,0l-3.9,-6.7c-0.2,-0.4 -0.7,-0.5 -1.1,-0.3C38.8,38.328 38.7,38.828 38.9,39.228l3.8,6.6C36.2,49.428 31.7,56.028 31,63.928h46C76.3,56.028 71.8,49.428 65.3,45.828zM43.4,57.328c-0.8,0 -1.5,-0.5 -1.8,-1.2c-0.3,-0.7 -0.1,-1.5 0.4,-2.1c0.5,-0.5 1.4,-0.7 2.1,-0.4c0.7,0.3 1.2,1 1.2,1.8C45.3,56.528 44.5,57.328 43.4,57.328L43.4,57.328zM64.6,57.328c-0.8,0 -1.5,-0.5 -1.8,-1.2s-0.1,-1.5 0.4,-2.1c0.5,-0.5 1.4,-0.7 2.1,-0.4c0.7,0.3 1.2,1 1.2,1.8C66.5,56.528 65.6,57.328 64.6,57.328L64.6,57.328z"
+        android:strokeWidth="1"
+        android:strokeColor="#00000000" />
+</vector>

externals/oboe/samples/minimaloboe/src/main/res/drawable/ic_launcher_background.xml

@@ -0,0 +1,170 @@
+<?xml version="1.0" encoding="utf-8"?>
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportWidth="108"
+    android:viewportHeight="108">
+    <path
+        android:fillColor="#3DDC84"
+        android:pathData="M0,0h108v108h-108z" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M9,0L9,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,0L19,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M29,0L29,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M39,0L39,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M49,0L49,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M59,0L59,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M69,0L69,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M79,0L79,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M89,0L89,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M99,0L99,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,9L108,9"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,19L108,19"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,29L108,29"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,39L108,39"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,49L108,49"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,59L108,59"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,69L108,69"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,79L108,79"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,89L108,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,99L108,99"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,29L89,29"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,39L89,39"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,49L89,49"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,59L89,59"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,69L89,69"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,79L89,79"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M29,19L29,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M39,19L39,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M49,19L49,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M59,19L59,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M69,19L69,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M79,19L79,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+</vector>

externals/oboe/samples/minimaloboe/src/main/res/mipmap-anydpi-v26/ic_launcher.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@drawable/ic_launcher_background" />
+    <foreground android:drawable="@drawable/ic_launcher_foreground" />
+</adaptive-icon>

externals/oboe/samples/minimaloboe/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@drawable/ic_launcher_background" />
+    <foreground android:drawable="@drawable/ic_launcher_foreground" />
+</adaptive-icon>

externals/oboe/samples/minimaloboe/src/main/res/values/colors.xml

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <color name="purple_200">#FFBB86FC</color>
+    <color name="purple_500">#FF6200EE</color>
+    <color name="purple_700">#FF3700B3</color>
+    <color name="teal_200">#FF03DAC5</color>
+    <color name="teal_700">#FF018786</color>
+    <color name="black">#FF000000</color>
+    <color name="white">#FFFFFFFF</color>
+</resources>

externals/oboe/samples/minimaloboe/src/main/res/values/strings.xml

@@ -0,0 +1,3 @@
+<resources>
+    <string name="app_name">MinimalOboe</string>
+</resources>

externals/oboe/samples/minimaloboe/src/main/res/values/themes.xml

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+
+    <style name="Theme.Samples" parent="android:Theme.Material.Light.NoActionBar">
+        <item name="android:statusBarColor">@color/purple_700</item>
+    </style>
+</resources>