Video streaming sample app.

app/src/main/java/org/thoughtcrime/securesms/components/voice/VoiceNoteMediaNotificationProvider.kt

@@ -18,7 +18,6 @@ import androidx.media3.common.MediaMetadata
 import androidx.media3.common.Player
 import androidx.media3.common.util.Assertions
 import androidx.media3.common.util.UnstableApi
-import androidx.media3.common.util.Util
 import androidx.media3.session.CommandButton
 import androidx.media3.session.DefaultMediaNotificationProvider
 import androidx.media3.session.MediaNotification

dependencies.gradle

@@ -29,6 +29,7 @@ dependencyResolutionManagement {
             library('androidx-compose-material3', 'androidx.compose.material3', 'material3').withoutVersion()
             library('androidx-compose-ui-tooling-preview', 'androidx.compose.ui', 'ui-tooling-preview').withoutVersion()
             library('androidx-compose-ui-tooling-core', 'androidx.compose.ui', 'ui-tooling').withoutVersion()
+            library('androidx-compose-ui-test-manifest', 'androidx.compose.ui', 'ui-test-manifest').withoutVersion()
             library('androidx-compose-runtime-livedata', 'androidx.compose.runtime', 'runtime-livedata').withoutVersion()
             library('androidx-compose-rxjava3', 'androidx.compose.runtime:runtime-rxjava3:1.4.2')
             library('ktlint-twitter-compose', 'com.twitter.compose.rules:ktlint:0.0.26')
@@ -47,6 +48,7 @@ dependencyResolutionManagement {
 
             // Android X
             library('androidx-activity-ktx', 'androidx.activity', 'activity-ktx').versionRef('androidx-activity')
+            library('androidx-activity-compose', 'androidx.activity', 'activity-compose').versionRef('androidx-activity')
             library('androidx-appcompat', 'androidx.appcompat', 'appcompat').versionRef('androidx-appcompat')
             library('androidx-core-ktx', 'androidx.core:core-ktx:1.10.0')
             library('androidx-fragment-ktx', 'androidx.fragment', 'fragment-ktx').versionRef('androidx-fragment')

gradle/verification-metadata.xml

@@ -362,6 +362,14 @@ https://docs.gradle.org/current/userguide/dependency_verification.html
             <sha256 value="80512d30da688904b645029f039cedc3e25be99de3851170e253315c55839aa6" origin="Generated by Gradle"/>
          </artifact>
       </component>
+      <component group="androidx.compose.compiler" name="compiler" version="1.4.3">
+         <artifact name="compiler-1.4.3.jar">
+            <sha256 value="43fcad86835221accdc8c4043fa52d2dfcc8d66442498d298c6404376d18d17c" origin="Generated by Gradle"/>
+         </artifact>
+         <artifact name="compiler-1.4.3.module">
+            <sha256 value="966361be4253a8488efc74132ff6cbdd0cbe89ecbde18db2639d189a8f29b92e" origin="Generated by Gradle"/>
+         </artifact>
+      </component>
       <component group="androidx.compose.compiler" name="compiler" version="1.4.4">
          <artifact name="compiler-1.4.4.jar">
             <sha256 value="501521d2776e656e1b80ca0a3023960628b6a1f28c4b91f3178ac60b4cb33714" origin="Generated by Gradle"/>
@@ -428,6 +436,11 @@ https://docs.gradle.org/current/userguide/dependency_verification.html
             <sha256 value="d591498ced23a207db2849dba1c7dcc4aa41b8f9167d1f46bad50ca97c2cbf75" origin="Generated by Gradle"/>
          </artifact>
       </component>
+      <component group="androidx.compose.runtime" name="runtime" version="1.0.1">
+         <artifact name="runtime-1.0.1.module">
+            <sha256 value="2543a8c7edc16bde91f140286b4fd3773d7204a283a4ec99f6e5e286aa92c0c3" origin="Generated by Gradle"/>
+         </artifact>
+      </component>
       <component group="androidx.compose.runtime" name="runtime" version="1.4.2">
          <artifact name="runtime-1.4.2.aar">
             <sha256 value="41ff5a9fbbcb8a7403345b5426e454d73278878d469b088893ecb917cc7fd84c" origin="Generated by Gradle"/>
@@ -476,6 +489,11 @@ https://docs.gradle.org/current/userguide/dependency_verification.html
             <sha256 value="c435d7c87b6b7fa40c1affc7a4bcd2698c181d5ac31eec8069a177b000b42eda" origin="Generated by Gradle"/>
          </artifact>
       </component>
+      <component group="androidx.compose.runtime" name="runtime-saveable" version="1.0.1">
+         <artifact name="runtime-saveable-1.0.1.module">
+            <sha256 value="c0d6f142542d8d74f65481ef6526d2be265f01f812a112948fcde87a458f4fb6" origin="Generated by Gradle"/>
+         </artifact>
+      </component>
       <component group="androidx.compose.runtime" name="runtime-saveable" version="1.4.2">
          <artifact name="runtime-saveable-1.4.2.module">
             <sha256 value="3677ee9c263f671944711b36e2455b4cde9e83c9266508cd2a45d9dc01a3abc6" origin="Generated by Gradle"/>
@@ -489,6 +507,11 @@ https://docs.gradle.org/current/userguide/dependency_verification.html
             <sha256 value="0200f91f504e138b8c4af2c7da19e510efe1400409903b97af047e9295ea8347" origin="Generated by Gradle"/>
          </artifact>
       </component>
+      <component group="androidx.compose.ui" name="ui" version="1.0.1">
+         <artifact name="ui-1.0.1.module">
+            <sha256 value="57031a6ac9b60e5b56792ebf5cde6e16812ff566ed9190cbd188b00b46c13779" origin="Generated by Gradle"/>
+         </artifact>
+      </component>
       <component group="androidx.compose.ui" name="ui" version="1.2.1">
          <artifact name="ui-1.2.1.module">
             <sha256 value="f068eba19a90f039b626afe78ef74f352f124d2834fde52c3bf1a0ea1726b041" origin="Generated by Gradle"/>
@@ -528,6 +551,14 @@ https://docs.gradle.org/current/userguide/dependency_verification.html
             <sha256 value="145368f666b9881a571884690a1a480856908e1393d197e2c694e9070c9f9054" origin="Generated by Gradle"/>
          </artifact>
       </component>
+      <component group="androidx.compose.ui" name="ui-test-manifest" version="1.4.3">
+         <artifact name="ui-test-manifest-1.4.3.aar">
+            <sha256 value="f8f33961de762aab99f325961e249b646f231c014edb2564204b36ca9dfc698a" origin="Generated by Gradle"/>
+         </artifact>
+         <artifact name="ui-test-manifest-1.4.3.module">
+            <sha256 value="a66cab504a46f4768fbd744a0f1d42bc3edbf5881be9d882469faf11521c0397" origin="Generated by Gradle"/>
+         </artifact>
+      </component>
       <component group="androidx.compose.ui" name="ui-text" version="1.0.0">
          <artifact name="ui-text-1.0.0.module">
             <sha256 value="a85fde2fe3c50e9e956daa449f27e7a10c13fe4a1cafe7f41b478ed9ecb6166b" origin="Generated by Gradle"/>
@@ -1278,6 +1309,14 @@ https://docs.gradle.org/current/userguide/dependency_verification.html
             <sha256 value="23542c8c85cc58fafe0ae8cba201e6c9e01b4c6799223340a2d6a51d7784828c" origin="Generated by Gradle"/>
          </artifact>
       </component>
+      <component group="androidx.recyclerview" name="recyclerview" version="1.3.0">
+         <artifact name="recyclerview-1.3.0.aar">
+            <sha256 value="d65928a00f63589a49e21925412e0f48852f89254b07b03c030d560f91effc88" origin="Generated by Gradle"/>
+         </artifact>
+         <artifact name="recyclerview-1.3.0.module">
+            <sha256 value="7fa22bf1ab1a8d1544622076e2ad8454e2bef1402b3298b5b4079ab732e38845" origin="Generated by Gradle"/>
+         </artifact>
+      </component>
       <component group="androidx.recyclerview" name="recyclerview" version="1.3.1">
          <artifact name="recyclerview-1.3.1.aar">
             <sha256 value="4cfed42bdcc196d11e9b10da68c1f96cd4bda4cd8521e7285f62442c0c11de08" origin="Generated by Gradle"/>

settings.gradle

@@ -55,6 +55,8 @@ include ':sticky-header-grid'
 include ':photoview'
 include ':core-ui'
 include ':benchmark'
+include ':microbenchmark'
+include ':video-app'
 
 project(':app').name = 'Signal-Android'
 project(':paging').projectDir = file('paging/lib')
@@ -86,4 +88,3 @@ project(':qr-app').projectDir = file('qr/app')
 rootProject.name='Signal'
 
 apply from: 'dependencies.gradle'
-include ':microbenchmark'

video-app/.gitignore

@@ -0,0 +1 @@
+/build

video-app/build.gradle.kts

@@ -0,0 +1,67 @@
+/*
+ * Copyright 2023 Signal Messenger, LLC
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+plugins {
+  id("signal-sample-app")
+}
+
+val signalBuildToolsVersion: String by extra
+val signalCompileSdkVersion: String by extra
+val signalTargetSdkVersion: Int by extra
+val signalMinSdkVersion: Int by extra
+val signalJavaVersion: JavaVersion by extra
+
+android {
+  namespace = "org.thoughtcrime.video.app"
+  compileSdkVersion = signalCompileSdkVersion
+
+  defaultConfig {
+    applicationId = "org.thoughtcrime.video.app"
+    minSdk = signalMinSdkVersion
+    targetSdk = signalTargetSdkVersion
+    versionCode = 1
+    versionName = "1.0"
+
+    testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
+    vectorDrawables {
+      useSupportLibrary = true
+    }
+  }
+
+  buildTypes {
+    release {
+      isMinifyEnabled = false
+      proguardFiles(getDefaultProguardFile("proguard-android-optimize.txt"), "proguard-rules.pro")
+    }
+  }
+  compileOptions {
+    sourceCompatibility = signalJavaVersion
+    targetCompatibility = signalJavaVersion
+  }
+  kotlinOptions {
+    jvmTarget = "11"
+  }
+  buildFeatures {
+    compose = true
+  }
+  composeOptions {
+    kotlinCompilerExtensionVersion = "1.4.3"
+  }
+  packaging {
+    resources {
+      excludes += "/META-INF/{AL2.0,LGPL2.1}"
+    }
+  }
+}
+
+dependencies {
+  implementation(libs.androidx.fragment.ktx)
+  implementation(libs.androidx.activity.compose)
+  implementation(platform(libs.androidx.compose.bom))
+  implementation(libs.androidx.compose.material3)
+  implementation(libs.bundles.media3)
+  debugImplementation(libs.androidx.compose.ui.tooling.core)
+  debugImplementation(libs.androidx.compose.ui.test.manifest)
+}

video-app/proguard-rules.pro

@@ -0,0 +1,21 @@
+# 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

video-app/src/androidTest/java/org/thoughtcrime/video/app/ExampleInstrumentedTest.kt

@@ -0,0 +1,27 @@
+/*
+ * Copyright 2023 Signal Messenger, LLC
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+package org.thoughtcrime.video.app
+
+import androidx.test.ext.junit.runners.AndroidJUnit4
+import androidx.test.platform.app.InstrumentationRegistry
+import org.junit.Assert.assertEquals
+import org.junit.Test
+import org.junit.runner.RunWith
+
+/**
+ * Instrumented test, which will execute on an Android device.
+ *
+ * See [testing documentation](http://d.android.com/tools/testing).
+ */
+@RunWith(AndroidJUnit4::class)
+class ExampleInstrumentedTest {
+  @Test
+  fun useAppContext() {
+    // Context of the app under test.
+    val appContext = InstrumentationRegistry.getInstrumentation().targetContext
+    assertEquals("org.thoughtcrime.video.app", appContext.packageName)
+  }
+}

video-app/src/main/AndroidManifest.xml

@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright 2023 Signal Messenger, LLC
+  ~ SPDX-License-Identifier: AGPL-3.0-only
+  -->
+
+<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.Signal">
+        <activity
+            android:name=".MainActivity"
+            android:exported="true"
+            android:label="@string/app_name"
+            android:theme="@style/Theme.Signal">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
+
+</manifest>

video-app/src/main/java/org/thoughtcrime/video/app/MainActivity.kt

@@ -0,0 +1,118 @@
+/*
+ * Copyright 2023 Signal Messenger, LLC
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+package org.thoughtcrime.video.app
+
+import android.os.Bundle
+import android.util.Log
+import androidx.activity.ComponentActivity
+import androidx.activity.compose.setContent
+import androidx.activity.result.PickVisualMediaRequest
+import androidx.activity.result.contract.ActivityResultContracts
+import androidx.activity.viewModels
+import androidx.annotation.OptIn
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.material3.Button
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Surface
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.tooling.preview.Preview
+import androidx.compose.ui.viewinterop.AndroidView
+import androidx.media3.common.util.UnstableApi
+import androidx.media3.exoplayer.ExoPlayer
+import androidx.media3.exoplayer.source.MediaSource
+import androidx.media3.ui.PlayerView
+import org.thoughtcrime.video.app.ui.theme.SignalTheme
+
+/**
+ * Main activity for this sample app.
+ */
+class MainActivity : ComponentActivity() {
+  private val viewModel: MainScreenViewModel by viewModels()
+  private lateinit var exoPlayer: ExoPlayer
+
+  override fun onCreate(savedInstanceState: Bundle?) {
+    super.onCreate(savedInstanceState)
+    viewModel.initialize(this)
+    exoPlayer = ExoPlayer.Builder(this).build()
+    setContent {
+      SignalTheme {
+        Surface(modifier = Modifier.fillMaxSize(), color = MaterialTheme.colorScheme.background) {
+          Column(
+            verticalArrangement = Arrangement.Center,
+            horizontalAlignment = Alignment.CenterHorizontally
+          ) {
+            val videoUri = viewModel.selectedVideo
+            if (videoUri == null) {
+              LabeledButton("Select Video") { pickMedia.launch(PickVisualMediaRequest(ActivityResultContracts.PickVisualMedia.VideoOnly)) }
+            } else {
+              LabeledButton("Play Video") { viewModel.updateMediaSource(this@MainActivity) }
+              LabeledButton("Play Video with slow download") { viewModel.updateMediaSourceTrickle(this@MainActivity) }
+              ExoVideoView(source = viewModel.mediaSource, exoPlayer = exoPlayer)
+            }
+          }
+        }
+      }
+    }
+  }
+
+  override fun onPause() {
+    super.onPause()
+    exoPlayer.pause()
+  }
+
+  override fun onDestroy() {
+    super.onDestroy()
+    viewModel.releaseCache()
+    exoPlayer.stop()
+    exoPlayer.release()
+  }
+
+  /**
+   * This launches the system media picker and stores the resulting URI.
+   */
+  private val pickMedia = registerForActivityResult(ActivityResultContracts.PickVisualMedia()) { uri ->
+    if (uri != null) {
+      Log.d("PhotoPicker", "Selected URI: $uri")
+      viewModel.selectedVideo = uri
+      viewModel.updateMediaSource(this)
+    } else {
+      Log.d("PhotoPicker", "No media selected")
+    }
+  }
+}
+
+@Composable
+fun LabeledButton(buttonLabel: String, modifier: Modifier = Modifier, onClick: () -> Unit) {
+  Button(onClick = onClick, modifier = modifier) {
+    Text(buttonLabel)
+  }
+}
+
+@OptIn(UnstableApi::class)
+@Composable
+fun ExoVideoView(source: MediaSource, exoPlayer: ExoPlayer, modifier: Modifier = Modifier) {
+  exoPlayer.playWhenReady = false
+  exoPlayer.setMediaSource(source)
+  exoPlayer.prepare()
+  AndroidView(factory = { context ->
+    PlayerView(context).apply {
+      player = exoPlayer
+    }
+  }, modifier = modifier)
+}
+
+@Preview(showBackground = true)
+@Composable
+fun GreetingPreview() {
+  SignalTheme {
+    LabeledButton("Preview Render") {}
+  }
+}

video-app/src/main/java/org/thoughtcrime/video/app/MainScreenViewModel.kt

@@ -0,0 +1,93 @@
+/*
+ * Copyright 2023 Signal Messenger, LLC
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+package org.thoughtcrime.video.app
+
+import android.content.Context
+import android.net.Uri
+import androidx.annotation.OptIn
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.setValue
+import androidx.lifecycle.ViewModel
+import androidx.media3.common.MediaItem
+import androidx.media3.common.util.UnstableApi
+import androidx.media3.datasource.DefaultDataSource
+import androidx.media3.datasource.cache.Cache
+import androidx.media3.datasource.cache.CacheDataSource
+import androidx.media3.datasource.cache.NoOpCacheEvictor
+import androidx.media3.datasource.cache.SimpleCache
+import androidx.media3.exoplayer.source.MediaSource
+import androidx.media3.exoplayer.source.ProgressiveMediaSource
+import androidx.media3.exoplayer.source.SilenceMediaSource
+import java.io.File
+
+/**
+ * Main screen view model for the video sample app.
+ */
+@OptIn(UnstableApi::class)
+class MainScreenViewModel : ViewModel() {
+  // Initialize an silent media source before the user selects a video. This is the closest I could find to an "empty" media source while still being nullsafe.
+  private val value by lazy {
+    val factory = SilenceMediaSource.Factory()
+    factory.setDurationUs(1000)
+    factory.createMediaSource()
+  }
+
+  private lateinit var cache: Cache
+
+  var selectedVideo: Uri? by mutableStateOf(null)
+  var mediaSource: MediaSource by mutableStateOf(value)
+    private set
+
+  /**
+   * Initialize the backing cache. This is a file in the app's cache directory that has a random suffix to ensure you get cache misses on a new app launch.
+   *
+   * @param context required to get the file path of the cache directory.
+   */
+  fun initialize(context: Context) {
+    val cacheDir = File(context.cacheDir.absolutePath)
+    cache = SimpleCache(File(cacheDir, getRandomString(12)), NoOpCacheEvictor())
+  }
+
+  fun updateMediaSource(context: Context) {
+    selectedVideo?.let {
+      mediaSource = ProgressiveMediaSource.Factory(DefaultDataSource.Factory(context)).createMediaSource(MediaItem.fromUri(it))
+    }
+  }
+
+  /**
+   * Replaces the media source with one that has a latency to each read from the media source, simulating network latency.
+   * It stores the result in a cache (that does not have a penalty) to better mimic real-world performance:
+   * once a chunk is downloaded from the network, it will not have to be re-fetched.
+   *
+   * @param context
+   */
+  fun updateMediaSourceTrickle(context: Context) {
+    selectedVideo?.let {
+      val cacheFactory = CacheDataSource.Factory()
+        .setCache(cache)
+        .setUpstreamDataSourceFactory(SlowDataSource.Factory(context, 10))
+      mediaSource = ProgressiveMediaSource.Factory(cacheFactory).createMediaSource(MediaItem.fromUri(it))
+    }
+  }
+
+  fun releaseCache() {
+    cache.release()
+  }
+
+  /**
+   * Get random string. Will always return at least one character.
+   *
+   * @param length length of the returned string.
+   * @return a string composed of random alphanumeric characters of the specified length (minimum of 1).
+   */
+  private fun getRandomString(length: Int): String {
+    val allowedChars = ('A'..'Z') + ('a'..'z') + ('0'..'9')
+    return (1..length.coerceAtLeast(1))
+      .map { allowedChars.random() }
+      .joinToString("")
+  }
+}

video-app/src/main/java/org/thoughtcrime/video/app/SlowDataSource.kt

@@ -0,0 +1,55 @@
+/*
+ * Copyright 2023 Signal Messenger, LLC
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+package org.thoughtcrime.video.app
+
+import android.content.Context
+import android.net.Uri
+import androidx.annotation.OptIn
+import androidx.media3.common.util.UnstableApi
+import androidx.media3.datasource.DataSource
+import androidx.media3.datasource.DataSpec
+import androidx.media3.datasource.DefaultDataSource
+import androidx.media3.datasource.TransferListener
+
+/**
+ * This wraps a [DefaultDataSource] and adds [latency] to each read. This is intended to approximate a slow/shoddy network connection that drip-feeds in data.
+ *
+ * @property latency the amount, in milliseconds, that each read should be delayed. A good proxy for network ping.
+ * @constructor
+ *
+ * @param context used to initialize the underlying [DefaultDataSource.Factory]
+ */
+@OptIn(UnstableApi::class)
+class SlowDataSource(context: Context, private val latency: Long) : DataSource {
+  private val internalDataSource: DataSource = DefaultDataSource.Factory(context).createDataSource()
+
+  override fun read(buffer: ByteArray, offset: Int, length: Int): Int {
+    Thread.sleep(latency)
+    return internalDataSource.read(buffer, offset, length)
+  }
+
+  override fun addTransferListener(transferListener: TransferListener) {
+    internalDataSource.addTransferListener(transferListener)
+  }
+
+  override fun open(dataSpec: DataSpec): Long {
+    return internalDataSource.open(dataSpec)
+  }
+
+  override fun getUri(): Uri? {
+    return internalDataSource.uri
+  }
+
+  override fun close() {
+    return internalDataSource.close()
+  }
+
+  class Factory(private val context: Context, private val latency: Long) : DataSource.Factory {
+    override fun createDataSource(): DataSource {
+      return SlowDataSource(context, latency)
+    }
+  }
+}

video-app/src/main/java/org/thoughtcrime/video/app/ui/theme/Color.kt

@@ -0,0 +1,11 @@
+package org.thoughtcrime.video.app.ui.theme
+
+import androidx.compose.ui.graphics.Color
+
+val Purple80 = Color(0xFFD0BCFF)
+val PurpleGrey80 = Color(0xFFCCC2DC)
+val Pink80 = Color(0xFFEFB8C8)
+
+val Purple40 = Color(0xFF6650a4)
+val PurpleGrey40 = Color(0xFF625b71)
+val Pink40 = Color(0xFF7D5260)

video-app/src/main/java/org/thoughtcrime/video/app/ui/theme/Theme.kt

@@ -0,0 +1,75 @@
+/*
+ * Copyright 2023 Signal Messenger, LLC
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+package org.thoughtcrime.video.app.ui.theme
+
+import android.app.Activity
+import android.os.Build
+import androidx.compose.foundation.isSystemInDarkTheme
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.darkColorScheme
+import androidx.compose.material3.dynamicDarkColorScheme
+import androidx.compose.material3.dynamicLightColorScheme
+import androidx.compose.material3.lightColorScheme
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.SideEffect
+import androidx.compose.ui.graphics.toArgb
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.platform.LocalView
+import androidx.core.view.WindowCompat
+
+private val DarkColorScheme = darkColorScheme(
+  primary = Purple80,
+  secondary = PurpleGrey80,
+  tertiary = Pink80
+)
+
+private val LightColorScheme = lightColorScheme(
+  primary = Purple40,
+  secondary = PurpleGrey40,
+  tertiary = Pink40
+
+  /* Other default colors to override
+    background = Color(0xFFFFFBFE),
+    surface = Color(0xFFFFFBFE),
+    onPrimary = Color.White,
+    onSecondary = Color.White,
+    onTertiary = Color.White,
+    onBackground = Color(0xFF1C1B1F),
+    onSurface = Color(0xFF1C1B1F),
+   */
+)
+
+@Composable
+fun SignalTheme(
+  darkTheme: Boolean = isSystemInDarkTheme(),
+  // Dynamic color is available on Android 12+
+  dynamicColor: Boolean = true,
+  content: @Composable () -> Unit
+) {
+  val colorScheme = when {
+    dynamicColor && Build.VERSION.SDK_INT >= Build.VERSION_CODES.S -> {
+      val context = LocalContext.current
+      if (darkTheme) dynamicDarkColorScheme(context) else dynamicLightColorScheme(context)
+    }
+
+    darkTheme -> DarkColorScheme
+    else -> LightColorScheme
+  }
+  val view = LocalView.current
+  if (!view.isInEditMode) {
+    SideEffect {
+      val window = (view.context as Activity).window
+      window.statusBarColor = colorScheme.primary.toArgb()
+      WindowCompat.getInsetsController(window, view).isAppearanceLightStatusBars = darkTheme
+    }
+  }
+
+  MaterialTheme(
+    colorScheme = colorScheme,
+    typography = Typography,
+    content = content
+  )
+}

video-app/src/main/java/org/thoughtcrime/video/app/ui/theme/Type.kt

@@ -0,0 +1,39 @@
+/*
+ * Copyright 2023 Signal Messenger, LLC
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+package org.thoughtcrime.video.app.ui.theme
+
+import androidx.compose.material3.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(
+  bodyLarge = TextStyle(
+    fontFamily = FontFamily.Default,
+    fontWeight = FontWeight.Normal,
+    fontSize = 16.sp,
+    lineHeight = 24.sp,
+    letterSpacing = 0.5.sp
+  )
+  /* Other default text styles to override
+    titleLarge = TextStyle(
+        fontFamily = FontFamily.Default,
+        fontWeight = FontWeight.Normal,
+        fontSize = 22.sp,
+        lineHeight = 28.sp,
+        letterSpacing = 0.sp
+    ),
+    labelSmall = TextStyle(
+        fontFamily = FontFamily.Default,
+        fontWeight = FontWeight.Medium,
+        fontSize = 11.sp,
+        lineHeight = 16.sp,
+        letterSpacing = 0.5.sp
+    )
+   */
+)

video-app/src/main/res/drawable-v24/ic_launcher_foreground.xml

@@ -0,0 +1,35 @@
+<!--
+  ~ Copyright 2023 Signal Messenger, LLC
+  ~ SPDX-License-Identifier: AGPL-3.0-only
+  -->
+
+<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>

video-app/src/main/res/drawable/ic_launcher_background.xml

@@ -0,0 +1,175 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright 2023 Signal Messenger, LLC
+  ~ SPDX-License-Identifier: AGPL-3.0-only
+  -->
+
+<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>

video-app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright 2023 Signal Messenger, LLC
+  ~ SPDX-License-Identifier: AGPL-3.0-only
+  -->
+
+<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" />
+    <monochrome android:drawable="@drawable/ic_launcher_foreground" />
+</adaptive-icon>

video-app/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright 2023 Signal Messenger, LLC
+  ~ SPDX-License-Identifier: AGPL-3.0-only
+  -->
+
+<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" />
+    <monochrome android:drawable="@drawable/ic_launcher_foreground" />
+</adaptive-icon>

video-app/src/main/res/values/colors.xml

@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright 2023 Signal Messenger, LLC
+  ~ SPDX-License-Identifier: AGPL-3.0-only
+  -->
+
+<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>

video-app/src/main/res/values/strings.xml

@@ -0,0 +1,8 @@
+<!--
+  ~ Copyright 2023 Signal Messenger, LLC
+  ~ SPDX-License-Identifier: AGPL-3.0-only
+  -->
+
+<resources>
+    <string name="app_name">Video Player</string>
+</resources>

video-app/src/main/res/values/themes.xml

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright 2023 Signal Messenger, LLC
+  ~ SPDX-License-Identifier: AGPL-3.0-only
+  -->
+
+<resources>
+
+    <style name="Theme.Signal" parent="android:Theme.Material.Light.NoActionBar" />
+</resources>

video-app/src/test/java/org/thoughtcrime/video/app/ExampleUnitTest.kt

@@ -0,0 +1,21 @@
+/*
+ * Copyright 2023 Signal Messenger, LLC
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+package org.thoughtcrime.video.app
+
+import org.junit.Assert.assertEquals
+import org.junit.Test
+
+/**
+ * Example local unit test, which will execute on the development machine (host).
+ *
+ * See [testing documentation](http://d.android.com/tools/testing).
+ */
+class ExampleUnitTest {
+  @Test
+  fun addition_isCorrect() {
+    assertEquals(4, 2 + 2)
+  }
+}