RL Pebble <3

Manager/app/build.gradle.kts

@@ -190,6 +190,7 @@ dependencies {
     implementation(libs.bundles.ktor)
     implementation(libs.bundles.shizuku)
     implementation(libs.bundles.voyager)
+    implementation(libs.pebblekit2.client)
 
     implementation(libs.compose.ui.tooling.preview)
     debugImplementation(libs.compose.ui.tooling)

Manager/app/src/main/AndroidManifest.xml

@@ -43,6 +43,22 @@
         android:name=".installers.pm.PMIntentReceiver"
         android:exported="false" />
 
+    <!-- Pebble relay, bound by patched TIDAL -->
+    <service
+        android:name=".pebble.PebbleRelayService"
+        android:exported="true"
+        tools:ignore="ExportedService" />
+
+    <!-- Pebble watch messages -->
+    <service
+        android:name=".pebble.PebbleWatchListenerService"
+        android:exported="true"
+        tools:ignore="ExportedService">
+      <intent-filter>
+        <action android:name="io.rebble.pebblekit2.RECEIVE_DATA_FROM_WATCH" />
+      </intent-filter>
+    </service>
+
     <provider
         android:name="androidx.core.content.FileProvider"
         android:authorities="${applicationId}.provider"

Manager/app/src/main/assets/patches-manifest.json

@@ -780,6 +780,30 @@
         }
       ]
     },
+    {
+      "id": "PebbleIntegration",
+      "order": 91,
+      "category": "integration",
+      "fileNames": [
+        "integration-pebble-playback.patch",
+        "integration-pebble-lyrics.patch"
+      ],
+      "extensionFiles": [
+        "radiant/PebbleBridge.smali",
+        "radiant/PebbleBridge$1.smali",
+        "radiant/PebbleBridge$2.smali"
+      ],
+      "title": "Pebble Watch",
+      "description": "Shows synced lyrics on your Pebble Time 2 when listening, Everything is configured and managed in the Pebble App",
+      "default": false,
+      "requires": [
+        "LyricsRlApi"
+      ],
+      "companionApp": {
+        "storeId": "02b779dcf9084fecb0375df1",
+        "storeSource": "https://appstore-api.repebble.com/api"
+      }
+    },
     {
       "id": "DebugMenuUnlock",
       "order": 100,

Manager/app/src/main/kotlin/com/meowarex/rlmobile/patcher/steps/patch/PatchManifestStep.kt

@@ -29,6 +29,9 @@ class PatchManifestStep(private val options: PatchOptions) : Step() {
         val wazeDefault = container.getStep<SmaliPatchStep>().specs
             .firstOrNull { it.id == "WazeIntegration" }?.defaultEnabled ?: false
         val enableWazeIntegration = options.patchStates["WazeIntegration"] ?: wazeDefault
+        val pebbleDefault = container.getStep<SmaliPatchStep>().specs
+            .firstOrNull { it.id == "PebbleIntegration" }?.defaultEnabled ?: false
+        val enablePebbleIntegration = options.patchStates["PebbleIntegration"] ?: pebbleDefault
 
         val patchedManifest = ManifestPatcher.patchManifest(
             manifestBytes = manifest,
@@ -36,6 +39,7 @@ class PatchManifestStep(private val options: PatchOptions) : Step() {
             appName = options.appName,
             debuggable = options.debuggable,
             enableWazeIntegration = enableWazeIntegration,
+            enablePebbleIntegration = enablePebbleIntegration,
         )
 
         container.log("Repacking apk with patched manifest")

Manager/app/src/main/kotlin/com/meowarex/rlmobile/patcher/util/ManifestPatcher.kt

@@ -21,6 +21,8 @@ object ManifestPatcher {
     private const val WAZE_PACKAGE = "com.waze"
     private const val WAZE_INIT_RECEIVER = "radiant.WazeInitReceiver"
     private const val WAZE_ACTION_INIT = "com.waze.sdk.audio.ACTION_INIT"
+    // Pebble bridge binds to the Manager
+    private const val MANAGER_PACKAGE = "com.meowarex.rlmobile"
 
     fun patchManifest(
         manifestBytes: ByteArray,
@@ -28,6 +30,7 @@ object ManifestPatcher {
         appName: String,
         debuggable: Boolean,
         enableWazeIntegration: Boolean,
+        enablePebbleIntegration: Boolean,
     ): ByteArray {
         // Extract original package name to rewrite every reference to it
         // (permissions, provider authorities) to the new packageName.
@@ -90,11 +93,12 @@ object ManifestPatcher {
                         return when (name) {
                             "queries" -> object : NodeVisitor(nv) {
                                 private var hasWazePackage = false
+                                private var hasManagerPackage = false
 
                                 override fun child(ns: String?, name: String): NodeVisitor {
                                     val visitor = super.child(ns, name)
 
-                                    return if (enableWazeIntegration && name == "package") {
+                                    return if ((enableWazeIntegration || enablePebbleIntegration) && name == "package") {
                                         object : NodeVisitor(visitor) {
                                             override fun attr(
                                                 ns: String?,
@@ -106,6 +110,9 @@ object ManifestPatcher {
                                                 if (name == "name" && value == WAZE_PACKAGE) {
                                                     hasWazePackage = true
                                                 }
+                                                if (name == "name" && value == MANAGER_PACKAGE) {
+                                                    hasManagerPackage = true
+                                                }
                                                 super.attr(ns, name, resourceId, type, value)
                                             }
                                         }
@@ -127,6 +134,18 @@ object ManifestPatcher {
                                             end()
                                         }
                                     }
+                                    if (enablePebbleIntegration && !hasManagerPackage) {
+                                        super.child(null, "package").apply {
+                                            attr(
+                                                ANDROID_NAMESPACE,
+                                                "name",
+                                                android.R.attr.name,
+                                                TYPE_STRING,
+                                                MANAGER_PACKAGE,
+                                            )
+                                            end()
+                                        }
+                                    }
                                     super.end()
                                 }
                             }

Manager/app/src/main/kotlin/com/meowarex/rlmobile/pebble/PebbleWatchListenerService.kt

@@ -0,0 +1,40 @@
+package com.meowarex.rlmobile.pebble
+
+import android.os.SystemClock
+import io.rebble.pebblekit2.client.BasePebbleListenerService
+import io.rebble.pebblekit2.common.model.PebbleDictionary
+import io.rebble.pebblekit2.common.model.ReceiveResult
+import io.rebble.pebblekit2.common.model.WatchIdentifier
+import java.util.UUID
+
+// Forwards watch events to the relay
+class PebbleWatchListenerService : BasePebbleListenerService() {
+    override suspend fun onMessageReceived(
+        watchappUUID: UUID,
+        data: PebbleDictionary,
+        watch: WatchIdentifier,
+    ): ReceiveResult {
+        val receivedAt = SystemClock.elapsedRealtime()
+        if (watchappUUID != WatchProtocol.APP_UUID) return ReceiveResult.Nack
+        PebbleRelayService.current?.onWatchMessage(WatchProtocol.ints(data), receivedAt)
+        return ReceiveResult.Ack
+    }
+
+    override fun onAppOpened(watchappUUID: UUID, watch: WatchIdentifier) {
+        if (watchappUUID != WatchProtocol.APP_UUID) return
+        watchappOpen = true
+        PebbleRelayService.current?.onWatchappOpened()
+    }
+
+    override fun onAppClosed(watchappUUID: UUID, watch: WatchIdentifier) {
+        if (watchappUUID != WatchProtocol.APP_UUID) return
+        watchappOpen = false
+        PebbleRelayService.current?.onWatchappClosed()
+    }
+
+    companion object {
+        @Volatile
+        var watchappOpen = false
+            private set
+    }
+}

Manager/app/src/main/kotlin/com/meowarex/rlmobile/pebble/PebbleWatchapp.kt

@@ -0,0 +1,61 @@
+package com.meowarex.rlmobile.pebble
+
+import android.content.ActivityNotFoundException
+import android.content.Context
+import android.content.Intent
+import android.net.Uri
+import com.meowarex.rlmobile.R
+import com.meowarex.rlmobile.ui.screens.patchopts.CompanionAppSpec
+import com.meowarex.rlmobile.util.showToast
+import io.rebble.pebblekit2.client.DefaultPebbleSender
+import io.rebble.pebblekit2.common.model.TimelineResult
+
+// Watchapp install state and store links
+object PebbleWatchapp {
+    private const val PROBE_PIN_ID = "rl-install-probe"
+    private const val STORE_WEB = "https://apps.repebble.com/"
+    private const val APPS_TAB = "pebble://navbar/index"
+
+    enum class InstallState { Installed, NotInstalled, Unknown }
+
+    // Deleting a missing pin reveals install state
+    suspend fun installState(context: Context): InstallState = runCatching {
+        DefaultPebbleSender(context.applicationContext).use { sender ->
+            when (sender.deleteTimelinePin(WatchProtocol.APP_UUID, PROBE_PIN_ID)) {
+                TimelineResult.FailedUnknownPin, TimelineResult.Success -> InstallState.Installed
+                TimelineResult.FailedNoPermissions -> InstallState.NotInstalled
+                else -> InstallState.Unknown
+            }
+        }
+    }.getOrDefault(InstallState.Unknown)
+
+    fun canInstall(app: CompanionAppSpec): Boolean = !app.storeId.isNullOrBlank()
+
+    fun install(context: Context, app: CompanionAppSpec) = openStorePage(context, app)
+
+    // Apps tab, My Apps holds the settings
+    fun openSettings(context: Context) {
+        if (!start(context, Intent(Intent.ACTION_VIEW, Uri.parse(APPS_TAB)))) {
+            context.showToast(R.string.pebble_app_missing)
+        }
+    }
+
+    // Pebble app store page, else the web listing
+    private fun openStorePage(context: Context, app: CompanionAppSpec) {
+        val storeId = app.storeId?.takeIf { it.isNotBlank() } ?: return
+        val deepLink = Uri.Builder().scheme("pebble").authority("appstore").appendPath(storeId)
+            .apply { app.storeSource?.let { appendQueryParameter("source", it) } }
+            .build()
+        if (start(context, Intent(Intent.ACTION_VIEW, deepLink))) return
+        if (!start(context, Intent(Intent.ACTION_VIEW, Uri.parse(STORE_WEB + storeId)))) {
+            context.showToast(R.string.pebble_app_missing)
+        }
+    }
+
+    private fun start(context: Context, intent: Intent): Boolean = try {
+        context.startActivity(intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK))
+        true
+    } catch (_: ActivityNotFoundException) {
+        false
+    }
+}

Manager/app/src/main/kotlin/com/meowarex/rlmobile/pebble/WatchProtocol.kt

@@ -0,0 +1,265 @@
+package com.meowarex.rlmobile.pebble
+
+import io.rebble.pebblekit2.common.model.PebbleDictionary
+import io.rebble.pebblekit2.common.model.PebbleDictionaryItem
+import org.json.JSONArray
+import org.json.JSONObject
+import java.io.ByteArrayOutputStream
+import java.util.UUID
+import kotlin.math.roundToLong
+
+// Mirrors rl-pebble main.c and emu_driver.py
+object WatchProtocol {
+    val APP_UUID: UUID = UUID.fromString("79d7fe6a-b970-483a-b096-16da10af0433")
+
+    // package.json messageKeys order
+    const val KEY_CMD = 10000
+    const val KEY_TRACK_ID = 10001
+    const val KEY_TITLE = 10002
+    const val KEY_ARTIST = 10003
+    const val KEY_DURATION = 10004
+    const val KEY_STATUS = 10005
+    const val KEY_LINE_COUNT = 10006
+    const val KEY_CHUNK_INDEX = 10007
+    const val KEY_CHUNK = 10008
+    const val KEY_PLAYING = 10009
+    const val KEY_POSITION = 10010
+    const val KEY_INBOX_SIZE = 10011
+    const val KEY_PHONE_TIME = 10012
+    const val KEY_WATCH_TIME = 10013
+    const val KEY_PHONE_TIME_2 = 10014
+    const val KEY_SET_AUTO_OPEN = 10021
+
+    const val CMD_TRACK = 1
+    const val CMD_LINES = 2
+    const val CMD_STATE = 3
+    const val CMD_STATUS = 4
+    const val CMD_SYNC = 5
+    const val CMD_HELLO = 20
+    const val CMD_PLAY_PAUSE = 21
+    const val CMD_NEXT = 22
+    const val CMD_PREV = 23
+    const val CMD_SYNC_REQ = 24
+    const val CMD_SETTINGS = 25
+
+    const val STATUS_IDLE = 0
+    const val STATUS_LOADING = 1
+    const val STATUS_READY = 2
+    const val STATUS_NO_LYRICS = 3
+    const val STATUS_ERROR = 4
+
+    private const val SEG_BG = 1 shl 0
+    private const val SEG_SPACE = 1 shl 1
+    private const val LINE_RIGHT = 1 shl 0
+
+    private val WHITESPACE = Regex("\\s+")
+    private const val HOLD_FOREVER = Int.MAX_VALUE.toLong()
+    private const val LINE_ONLY_MS = 800L
+    private const val MAX_SEGMENTS = 120
+
+    class Segment(val time: Long, val duration: Long, val flags: Int, val text: String)
+
+    // end is when the line stops being lit
+    class Line(val start: Long, val end: Long, val segments: List<Segment>, val right: Boolean)
+
+    // Syllable level lines, lit until the next lead line.
+    fun shape(body: String): List<Line> {
+        val root = JSONObject(body)
+        val data = root.optJSONArray("data") ?: return emptyList()
+        val sides = singerSides(root, data)
+
+        class Raw(val start: Long, val end: Long, val allBackground: Boolean, val segments: List<Segment>, val right: Boolean)
+
+        val raws = ArrayList<Raw>(data.length())
+        for (i in 0 until data.length()) {
+            val item = data.optJSONObject(i) ?: continue
+            val syllabus = item.optJSONArray("syllabus")?.takeIf { it.length() > 0 }
+
+            val segments = ArrayList<Segment>()
+            val start: Long
+            val end: Long
+            var allBackground = false
+            if (syllabus != null) {
+                val first = syllabus.optJSONObject(0)
+                val last = syllabus.optJSONObject(syllabus.length() - 1)
+                start = first?.optLong("time") ?: 0
+                end = (last?.optLong("time") ?: 0) + (last?.optLong("duration") ?: 0)
+                allBackground = (0 until syllabus.length()).all {
+                    syllabus.optJSONObject(it)?.optBoolean("isBackground") == true
+                }
+                for (j in 0 until syllabus.length()) {
+                    val syllable = syllabus.optJSONObject(j) ?: continue
+                    val raw = text(syllable)
+                    val trimmed = raw.trim()
+                    if (trimmed.isEmpty()) continue
+                    var flags = if (syllable.optBoolean("isBackground")) SEG_BG else 0
+                    if (raw != raw.trimEnd()) flags = flags or SEG_SPACE
+                    segments += Segment(syllable.optLong("time"), syllable.optLong("duration"), flags, trimmed)
+                }
+            } else {
+                // Line timed only, one segment per word
+                start = (item.optDouble("startTime", 0.0) * 1000).roundToLong()
+                end = start + LINE_ONLY_MS
+                val words = text(item).split(WHITESPACE).filter { it.isNotEmpty() }
+                words.forEachIndexed { index, word ->
+                    segments += Segment(start, 0, if (index < words.lastIndex) SEG_SPACE else 0, word)
+                }
+            }
+            if (segments.isEmpty()) continue
+            raws += Raw(start, end, allBackground, segments.take(MAX_SEGMENTS), sides?.get(i) == 1)
+        }
+
+        return raws.mapIndexed { index, raw ->
+            val nextLead = (index + 1 until raws.size).firstOrNull { !raws[it].allBackground }?.let { raws[it].start }
+            Line(raw.start, (nextLead ?: HOLD_FOREVER).coerceAtLeast(raw.end), raw.segments, raw.right)
+        }
+    }
+
+    // RL Mobile duet sides, null for one side.
+    private fun singerSides(root: JSONObject, data: JSONArray): IntArray? {
+        val agents = root.optJSONObject("metadata")?.optJSONObject("agents")
+        fun singerOf(i: Int) = data.optJSONObject(i)?.optJSONObject("element")?.optString("singer")?.takeIf { it.isNotEmpty() }
+        fun typeOf(singer: String): String = agents?.optJSONObject(singer)?.optString("type", "person")
+            ?: when (singer) {
+                "v1000" -> "group"
+                "v2000" -> "other"
+                else -> "person"
+            }
+
+        // Groups left, second person right
+        val sideOf = HashMap<String, Int>()
+        var persons = 0
+        for (i in 0 until data.length()) {
+            val singer = singerOf(i) ?: continue
+            if (singer in sideOf) continue
+            sideOf[singer] = if (typeOf(singer) != "person") 0 else if (++persons == 2) 1 else 0
+        }
+
+        val sides = IntArray(data.length()) { i -> singerOf(i)?.let { sideOf[it] ?: 0 } ?: -1 }
+        val sided = sides.count { it >= 0 }
+        val right = sides.count { it == 1 }
+        // Nearly all right, swap
+        if (sided > 0 && right * 100 / sided >= 85) {
+            for (i in sides.indices) if (sides[i] >= 0) sides[i] = 1 - sides[i]
+        }
+        return if (sides.any { it == 0 } && sides.any { it == 1 }) sides else null
+    }
+
+    private fun text(obj: JSONObject): String =
+        obj.optString("romanized").takeIf { it.isNotBlank() } ?: obj.optString("text")
+
+    private fun encodeLine(line: Line): ByteArray {
+        val out = ByteArrayOutputStream()
+        out.u32(line.start)
+        out.u32(line.end)
+        out.write(line.segments.size)
+        out.write(if (line.right) LINE_RIGHT else 0)
+        for (segment in line.segments) {
+            val text = utf8Truncate(segment.text, 255)
+            out.u16((segment.time - line.start).coerceIn(0, 65535))
+            out.u16(segment.duration.coerceIn(0, 65535))
+            out.write(segment.flags)
+            out.write(text.size)
+            out.write(text)
+        }
+        return out.toByteArray()
+    }
+
+    // Whole lines per chunk, keyed by first index.
+    fun chunks(lines: List<Line>, budget: Int): List<Pair<Int, ByteArray>> {
+        val result = ArrayList<Pair<Int, ByteArray>>()
+        val buf = ByteArrayOutputStream()
+        var first = 0
+        lines.forEachIndexed { index, line ->
+            val encoded = encodeLine(line)
+            if (buf.size() > 0 && buf.size() + encoded.size > budget) {
+                result += first to buf.toByteArray()
+                buf.reset()
+                first = index
+            }
+            buf.write(encoded)
+        }
+        if (buf.size() > 0) result += first to buf.toByteArray()
+        return result
+    }
+
+    fun track(trackId: Long, title: String, artist: String, durationMs: Long, status: Int, lineCount: Int): PebbleDictionary =
+        mapOf(
+            key(KEY_CMD) to PebbleDictionaryItem.UInt8(CMD_TRACK),
+            key(KEY_TRACK_ID) to PebbleDictionaryItem.UInt32(trackId),
+            key(KEY_TITLE) to PebbleDictionaryItem.Text(String(utf8Truncate(title, 60))),
+            key(KEY_ARTIST) to PebbleDictionaryItem.Text(String(utf8Truncate(artist, 60))),
+            key(KEY_DURATION) to PebbleDictionaryItem.UInt32(durationMs.coerceIn(0, 0xFFFFFFFFL)),
+            key(KEY_STATUS) to PebbleDictionaryItem.UInt8(status),
+            key(KEY_LINE_COUNT) to PebbleDictionaryItem.UInt16(lineCount),
+        )
+
+    fun lines(trackId: Long, firstIndex: Int, blob: ByteArray): PebbleDictionary = mapOf(
+        key(KEY_CMD) to PebbleDictionaryItem.UInt8(CMD_LINES),
+        key(KEY_TRACK_ID) to PebbleDictionaryItem.UInt32(trackId),
+        key(KEY_CHUNK_INDEX) to PebbleDictionaryItem.UInt16(firstIndex),
+        key(KEY_CHUNK) to PebbleDictionaryItem.Bytes(blob),
+    )
+
+    // Position at a phone elapsedRealtime.
+    fun state(trackId: Long, playing: Boolean, positionMs: Long, phoneTimeMs: Long): PebbleDictionary = mapOf(
+        key(KEY_CMD) to PebbleDictionaryItem.UInt8(CMD_STATE),
+        key(KEY_TRACK_ID) to PebbleDictionaryItem.UInt32(trackId),
+        key(KEY_PLAYING) to PebbleDictionaryItem.UInt8(if (playing) 1 else 0),
+        key(KEY_POSITION) to PebbleDictionaryItem.Int32(positionMs.coerceIn(0, Int.MAX_VALUE.toLong()).toInt()),
+        key(KEY_PHONE_TIME) to PebbleDictionaryItem.UInt32(phoneTimeMs and 0xFFFFFFFFL),
+    )
+
+    fun sync(watchTime: Long, receivedAt: Long, sentAt: Long): PebbleDictionary = mapOf(
+        key(KEY_CMD) to PebbleDictionaryItem.UInt8(CMD_SYNC),
+        key(KEY_WATCH_TIME) to PebbleDictionaryItem.UInt32(watchTime and 0xFFFFFFFFL),
+        key(KEY_PHONE_TIME) to PebbleDictionaryItem.UInt32(receivedAt and 0xFFFFFFFFL),
+        key(KEY_PHONE_TIME_2) to PebbleDictionaryItem.UInt32(sentAt and 0xFFFFFFFFL),
+    )
+
+    fun status(trackId: Long, status: Int): PebbleDictionary = mapOf(
+        key(KEY_CMD) to PebbleDictionaryItem.UInt8(CMD_STATUS),
+        key(KEY_TRACK_ID) to PebbleDictionaryItem.UInt32(trackId),
+        key(KEY_STATUS) to PebbleDictionaryItem.UInt8(status),
+    )
+
+    // Integer tuples from the watch.
+    fun ints(data: PebbleDictionary): Map<Int, Long> = buildMap {
+        for ((k, item) in data) {
+            val value = when (item) {
+                is PebbleDictionaryItem.UInt32 -> item.value.toLong()
+                is PebbleDictionaryItem.Int32 -> item.value.toLong()
+                is PebbleDictionaryItem.UInt16 -> item.value.toLong()
+                is PebbleDictionaryItem.Int16 -> item.value.toLong()
+                is PebbleDictionaryItem.UInt8 -> item.value.toLong()
+                is PebbleDictionaryItem.Int8 -> item.value.toLong()
+                else -> continue
+            }
+            put(k.toInt(), value)
+        }
+    }
+
+    private fun key(key: Int) = key.toUInt()
+
+    private fun utf8Truncate(text: String, limit: Int): ByteArray {
+        val raw = text.toByteArray(Charsets.UTF_8)
+        if (raw.size <= limit) return raw
+        var end = limit
+        // Don't split a code point
+        while (end > 0 && (raw[end].toInt() and 0xC0) == 0x80) end--
+        return raw.copyOf(end)
+    }
+
+    private fun ByteArrayOutputStream.u16(value: Long) {
+        write((value and 0xFF).toInt())
+        write(((value shr 8) and 0xFF).toInt())
+    }
+
+    private fun ByteArrayOutputStream.u32(value: Long) {
+        val v = value.coerceIn(0, 0xFFFFFFFFL)
+        write((v and 0xFF).toInt())
+        write(((v shr 8) and 0xFF).toInt())
+        write(((v shr 16) and 0xFF).toInt())
+        write(((v shr 24) and 0xFF).toInt())
+    }
+}

Manager/app/src/main/kotlin/com/meowarex/rlmobile/ui/legacy/screens/patchopts/components/PatchSelectionAccordion.kt

@@ -22,13 +22,18 @@ import androidx.compose.ui.Modifier
 import androidx.compose.ui.draw.alpha
 import androidx.compose.ui.draw.clip
 import androidx.compose.ui.draw.rotate
+import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.res.painterResource
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.semantics.Role
 import androidx.compose.ui.text.AnnotatedString
 import androidx.compose.ui.text.fromHtml
 import androidx.compose.ui.unit.dp
+import androidx.lifecycle.Lifecycle
+import androidx.lifecycle.compose.LocalLifecycleOwner
+import androidx.lifecycle.repeatOnLifecycle
 import com.meowarex.rlmobile.R
+import com.meowarex.rlmobile.pebble.PebbleWatchapp
 import com.meowarex.rlmobile.ui.screens.patchopts.OptionSpec
 import com.meowarex.rlmobile.ui.screens.patchopts.PatchLock
 import com.meowarex.rlmobile.ui.screens.patchopts.PatchOptionState
@@ -135,7 +140,9 @@ fun PatchSelectionAccordion(
 
                     val inlineOptions = patch.advancedOptions.filter { it.isInline }
                     val hasSheetOptions = patch.advancedOptions.any { !it.isInline }
-                    val hasSettings = patch.variants.isNotEmpty() || inlineOptions.isNotEmpty() || hasSheetOptions
+                    val companionApp = patch.companionApp
+                    val hasSettings = patch.variants.isNotEmpty() || inlineOptions.isNotEmpty() || hasSheetOptions ||
+                        companionApp != null
 
                     // When a patch is enabled and has settings show a carded view of the settings
                     val carded = checked && hasSettings
@@ -240,6 +247,56 @@ fun PatchSelectionAccordion(
                                             )
                                         }
                                     }
+
+                                    if (companionApp != null) {
+                                        val context = LocalContext.current
+                                        val lifecycleOwner = LocalLifecycleOwner.current
+                                        var installState by remember { mutableStateOf(PebbleWatchapp.InstallState.Unknown) }
+                                        // Recheck on resume
+                                        LaunchedEffect(lifecycleOwner) {
+                                            lifecycleOwner.repeatOnLifecycle(Lifecycle.State.RESUMED) {
+                                                installState = PebbleWatchapp.installState(context)
+                                            }
+                                        }
+                                        val installed = installState == PebbleWatchapp.InstallState.Installed
+                                        Row(
+                                            horizontalArrangement = Arrangement.spacedBy(8.dp, Alignment.CenterHorizontally),
+                                            modifier = Modifier.fillMaxWidth(),
+                                        ) {
+                                            FilledTonalButton(
+                                                onClick = { PebbleWatchapp.install(context, companionApp) },
+                                                enabled = !installed && PebbleWatchapp.canInstall(companionApp),
+                                                modifier = Modifier.weight(1f),
+                                            ) {
+                                                Icon(
+                                                    painter = painterResource(if (installed) R.drawable.ic_check_circle else R.drawable.ic_download),
+                                                    contentDescription = null,
+                                                    modifier = Modifier.size(18.dp),
+                                                )
+                                                Spacer(Modifier.width(8.dp))
+                                                Text(
+                                                    if (installed) {
+                                                        stringResource(R.string.patchopts_companion_installed)
+                                                    } else {
+                                                        companionApp.installTitle.ifBlank { stringResource(R.string.patchopts_companion_install) }
+                                                    }
+                                                )
+                                            }
+                                            FilledTonalButton(
+                                                onClick = { PebbleWatchapp.openSettings(context) },
+                                                enabled = installed,
+                                                modifier = Modifier.weight(1f),
+                                            ) {
+                                                Icon(
+                                                    painter = painterResource(R.drawable.ic_tune),
+                                                    contentDescription = null,
+                                                    modifier = Modifier.size(18.dp),
+                                                )
+                                                Spacer(Modifier.width(8.dp))
+                                                Text(companionApp.customizeTitle.ifBlank { stringResource(R.string.patchopts_companion_customize) })
+                                            }
+                                        }
+                                    }
                                 }
                             }
                         }

Manager/app/src/main/kotlin/com/meowarex/rlmobile/ui/screens/patchopts/PatchSpec.kt

@@ -34,6 +34,8 @@ data class PatchSpec(
     val advancedOptions: List<OptionSpec> = emptyList(),
     val category: String = CATEGORY_PATCH,
     val pathLocked: Boolean = false,
+    /** Watchapp shown under an integration. */
+    val companionApp: CompanionAppSpec? = null,
 ) {
     val isIntegration: Boolean get() = category == CATEGORY_INTEGRATION
 
@@ -43,6 +45,17 @@ data class PatchSpec(
     }
 }
 
+@Immutable
+@Serializable
+data class CompanionAppSpec(
+    val installTitle: String = "",
+    val customizeTitle: String = "",
+    /** Pebble appstore id. */
+    val storeId: String? = null,
+    /** Appstore feed url. */
+    val storeSource: String? = null,
+)
+
 @Immutable
 @Serializable
 data class VariantSpec(

Manager/app/src/main/kotlin/com/meowarex/rlmobile/ui/screens/patchopts/components/PatchSelectionAccordion.kt

@@ -19,13 +19,18 @@ import androidx.compose.ui.Modifier
 import androidx.compose.ui.draw.alpha
 import androidx.compose.ui.draw.clip
 import androidx.compose.ui.draw.rotate
+import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.res.painterResource
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.semantics.Role
 import androidx.compose.ui.text.AnnotatedString
 import androidx.compose.ui.text.fromHtml
 import androidx.compose.ui.unit.dp
+import androidx.lifecycle.Lifecycle
+import androidx.lifecycle.compose.LocalLifecycleOwner
+import androidx.lifecycle.repeatOnLifecycle
 import com.meowarex.rlmobile.R
+import com.meowarex.rlmobile.pebble.PebbleWatchapp
 import com.meowarex.rlmobile.ui.components.radiant.RadiantButton
 import com.meowarex.rlmobile.ui.components.radiant.RadiantButtonSize
 import com.meowarex.rlmobile.ui.components.radiant.RadiantSwitch
@@ -138,7 +143,9 @@ fun PatchSelectionAccordion(
 
                     val inlineOptions = patch.advancedOptions.filter { it.isInline }
                     val hasSheetOptions = patch.advancedOptions.any { !it.isInline }
-                    val hasSettings = patch.variants.isNotEmpty() || inlineOptions.isNotEmpty() || hasSheetOptions
+                    val companionApp = patch.companionApp
+                    val hasSettings = patch.variants.isNotEmpty() || inlineOptions.isNotEmpty() || hasSheetOptions ||
+                        companionApp != null
 
                     // When a patch is enabled and has settings show a carded view of the settings
                     val carded = checked && hasSettings
@@ -238,6 +245,47 @@ fun PatchSelectionAccordion(
                                             )
                                         }
                                     }
+
+                                    if (companionApp != null) {
+                                        val context = LocalContext.current
+                                        val lifecycleOwner = LocalLifecycleOwner.current
+                                        var installState by remember { mutableStateOf(PebbleWatchapp.InstallState.Unknown) }
+                                        // Recheck on resume
+                                        LaunchedEffect(lifecycleOwner) {
+                                            lifecycleOwner.repeatOnLifecycle(Lifecycle.State.RESUMED) {
+                                                installState = PebbleWatchapp.installState(context)
+                                            }
+                                        }
+                                        val installed = installState == PebbleWatchapp.InstallState.Installed
+                                        Row(
+                                            horizontalArrangement = Arrangement.spacedBy(8.dp, Alignment.CenterHorizontally),
+                                            modifier = Modifier.fillMaxWidth(),
+                                        ) {
+                                            RadiantButton(
+                                                text = if (installed) {
+                                                    stringResource(R.string.patchopts_companion_installed)
+                                                } else {
+                                                    companionApp.installTitle.ifBlank { stringResource(R.string.patchopts_companion_install) }
+                                                },
+                                                icon = painterResource(if (installed) R.drawable.ic_check_circle else R.drawable.ic_download),
+                                                onClick = { PebbleWatchapp.install(context, companionApp) },
+                                                enabled = !installed && PebbleWatchapp.canInstall(companionApp),
+                                                size = RadiantButtonSize.Small,
+                                                fillWidth = true,
+                                                modifier = Modifier.weight(1f),
+                                            )
+                                            RadiantButton(
+                                                text = companionApp.customizeTitle
+                                                    .ifBlank { stringResource(R.string.patchopts_companion_customize) },
+                                                icon = painterResource(R.drawable.ic_tune),
+                                                onClick = { PebbleWatchapp.openSettings(context) },
+                                                enabled = installed,
+                                                size = RadiantButtonSize.Small,
+                                                fillWidth = true,
+                                                modifier = Modifier.weight(1f),
+                                            )
+                                        }
+                                    }
                                 }
                             }
                         }

Manager/app/src/main/res/values/strings.xml

@@ -85,6 +85,10 @@
   <string name="settings_header_installation">Installation</string>
   <string name="settings_header_appearance">Appearance</string>
   <string name="settings_header_info">Info</string>
+  <string name="patchopts_companion_install">Install watchapp</string>
+  <string name="patchopts_companion_installed">Installed</string>
+  <string name="patchopts_companion_customize">Customize</string>
+  <string name="pebble_app_missing">Couldn\'t open the Pebble app. Is it installed?</string>
   <string name="setting_theme">Theme</string>
   <string name="setting_ui_style">UI style</string>
   <string name="setting_ui_style_desc">Want the old UI back?</string>

Manager/gradle/libs.versions.toml

@@ -32,6 +32,7 @@ kotlinx-serialization = "1.10.0"
 ktor = "3.4.0"
 libsu = "6.0.0"
 microg = "0.3.6.244735"
+pebblekit2 = "1.3.1"
 shimmer = "1.3.3"
 shizuku = "13.1.5"
 smali = "3.0.9"
@@ -115,6 +116,7 @@ hiddenApi-stub = { module = "dev.rikka.hidden:stub", version.ref = "hiddenApi-st
 microg = { module = "org.microg.gms:play-services-safetynet", version.ref = "microg" }
 desugaring = { module = "com.android.tools:desugar_jdk_libs", version.ref = "desugaring" }
 libsu = { module = "com.aliucord.libsu:core", version.ref = "libsu" }
+pebblekit2-client = { module = "io.rebble.pebblekit2:client", version.ref = "pebblekit2" }
 
 [bundles]
 accompanist = [

README.md

@@ -21,6 +21,7 @@ Every Patch & Integration can be disabled/enabled & adjusted exactly how you wan
 ### Integrations
 
 - Waze | Control TIDAL playback from Waze
+- Pebble Watch | Synced lyrics (Line, Word or Syllable) & playback controls on your Pebble
 
 ### Disclaimer
 

patches/R8-SYMBOLS.md

@@ -49,7 +49,15 @@ That script regenerates `extension/radiant/Kawarp.smali` and
 The Java side under `tools/kawarp-build/{src,stubs}` is not regenerated and keeps its
 markers.
 
-## 1. Rolled class references (268)
+## Gotcha: Pebble integration hooks
+
+`extension/radiant/PebbleBridge*.smali` is built by `tools/pebble-bridge-build/build.sh`.
+
+- `integration-pebble-playback.patch` hooks `bk0/e`, TIDAL's 200 ms position poller.
+  It holds `Lbk0/d;`, `ExoPlayer` and `Handler` and reposts with `0xc8`.
+- `integration-pebble-lyrics.patch` hooks our `RLAPILyricsWorker`, so no markers there.
+
+## 1. Rolled class references (270)
 
 | symbol | uses | referenced from |
 |---|---:|---|
@@ -298,6 +306,8 @@ markers.
 | `Lxf/d$a;` | 2 | `extension/radiant/gestures/queue/SearchPlaylistsResolver.smali` |
 | `La30/b;` | 1 | `player-favorite-heart.patch` |
 | `Landroidx/compose/foundation/text/input/a;` | 1 | `player-backdrop-playback.patch` |
+| `Lbk0/d;` | 1 | `integration-pebble-playback.patch` |
+| `Lbk0/e;` | 1 | `integration-pebble-playback.patch` |
 | `Lcom/aspiro/wamp/mycollection/subpages/favoritetracks/n;` | 1 | `gestures/queue/swipe-to-queue.patch` |
 | `Lcom/aspiro/wamp/nowplaying/view/playqueue/l;` | 1 | `gestures/queue/swipe-to-queue.patch` |
 | `Lcom/aspiro/wamp/nowplaying/view/playqueue/touchmanagement/a;` | 1 | `gestures/queue/swipe-to-queue.patch` |
@@ -676,12 +686,13 @@ The owner name survives R8; only the member name rolls. Match on the descriptor.
 | `Lz70/a;` | `c` | `:Lcom/aspiro/wamp/model/AvailabilityInteractor;` | 1 |
 | `Lzf/c;` | `c` | `:Lcom/tidal/android/navigation/NavigationInfo;` | 1 |
 
-## 3. Rolled patch target classes (64)
+## 3. Rolled patch target classes (65)
 
 `--- a/` headers naming an obfuscated class. If these move the hunk cannot even be located.
 
 | target | hooked by |
 |---|---|
+| `bk0/e.smali` | `integration-pebble-playback.patch` |
 | `cg0/h.smali` | `lyrics-rl-api-isrc.patch` |
 | `com/aspiro/wamp/mycollection/subpages/albums/myalbums/MyAlbumsView.smali` | `gestures/queue/swipe-to-queue.patch` |
 | `com/aspiro/wamp/mycollection/subpages/albums/search/SearchAlbumsView.smali` | `gestures/queue/swipe-to-queue.patch` |
@@ -747,7 +758,7 @@ The owner name survives R8; only the member name rolls. Match on the descriptor.
 | `p7/a.smali` | `gestures/queue/swipe-to-queue.patch` |
 | `v6/e.smali` | `gestures/queue/swipe-to-queue.patch` |
 
-## 4. Occurrences inside .patch files - not marked inline (220)
+## 4. Occurrences inside .patch files - not marked inline (221)
 
 | file | line | kind | symbols |
 |---|---:|---|---|
@@ -883,6 +894,7 @@ The owner name survives R8; only the member name rolls. Match on the descriptor.
 | `gestures/queue/swipe-to-queue.patch` | 469 | context | `Lcom/tidal/android/feature/appscaffold/ui/recyclerview/b; Lcom/tidal/android/feature/appscaffold/ui/recyclerview/a; a` |
 | `gestures/queue/swipe-to-queue.patch` | 482 | context | `Lcom/tidal/android/feature/appscaffold/ui/recyclerview/b; Lcom/tidal/android/feature/appscaffold/ui/recyclerview/a; a` |
 | `gestures/queue/swipe-to-queue.patch` | 500 | context | `Lcom/aspiro/wamp/nowplaying/view/suggestions/o0; Lcom/aspiro/wamp/nowplaying/view/suggestions/l; M` |
+| `integration-pebble-playback.patch` | 30 | context | `Lbk0/d; Lbk0/e;` |
 | `integration-waze-playback.patch` | 9 | added | `Lkotlin/jvm/internal/n;` |
 | `integration-waze-playback.patch` | 17 | added | `Lkotlin/jvm/internal/n;` |
 | `integration-waze-playback.patch` | 35 | added | `Lkotlin/jvm/internal/n;` |

patches/extension/radiant/PebbleBridge$1.smali

@@ -0,0 +1,56 @@
+.class Lradiant/PebbleBridge$1;
+.super Ljava/lang/Object;
+
+# interfaces
+.implements Ljava/lang/Runnable;
+
+
+# annotations
+.annotation system Ldalvik/annotation/EnclosingMethod;
+    value = Lradiant/PebbleBridge;->onPosition(J)V
+.end annotation
+
+.annotation system Ldalvik/annotation/InnerClass;
+    accessFlags = 0x0
+    name = null
+.end annotation
+
+
+# instance fields
+.field final synthetic val$at:J
+
+.field final synthetic val$position:J
+
+
+# direct methods
+.method constructor <init>(JJ)V
+    .registers 5
+    .annotation system Ldalvik/annotation/Signature;
+        value = {
+            "()V"
+        }
+    .end annotation
+
+    iput-wide p1, p0, Lradiant/PebbleBridge$1;->val$position:J
+
+    iput-wide p3, p0, Lradiant/PebbleBridge$1;->val$at:J
+
+    invoke-direct {p0}, Ljava/lang/Object;-><init>()V
+
+    return-void
+.end method
+
+
+# virtual methods
+.method public run()V
+    .registers 5
+
+    iget-wide v0, p0, Lradiant/PebbleBridge$1;->val$position:J
+
+    iget-wide v2, p0, Lradiant/PebbleBridge$1;->val$at:J
+
+    # invokes: Lradiant/PebbleBridge;->onSample(JJ)V
+    invoke-static {v0, v1, v2, v3}, Lradiant/PebbleBridge;->access$000(JJ)V
+
+    return-void
+.end method

patches/extension/radiant/PebbleBridge$2.smali

@@ -0,0 +1,50 @@
+.class Lradiant/PebbleBridge$2;
+.super Ljava/lang/Object;
+
+# interfaces
+.implements Ljava/lang/Runnable;
+
+
+# annotations
+.annotation system Ldalvik/annotation/EnclosingMethod;
+    value = Lradiant/PebbleBridge;->onLyrics(Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;)V
+.end annotation
+
+.annotation system Ldalvik/annotation/InnerClass;
+    accessFlags = 0x0
+    name = null
+.end annotation
+
+
+# direct methods
+.method constructor <init>()V
+    .registers 1
+
+    invoke-direct {p0}, Ljava/lang/Object;-><init>()V
+
+    return-void
+.end method
+
+
+# virtual methods
+.method public run()V
+    .registers 2
+
+    # getter for: Lradiant/PebbleBridge;->instance:Lradiant/PebbleBridge;
+    invoke-static {}, Lradiant/PebbleBridge;->access$100()Lradiant/PebbleBridge;
+
+    move-result-object v0
+
+    if-eqz v0, :cond_d
+
+    # getter for: Lradiant/PebbleBridge;->instance:Lradiant/PebbleBridge;
+    invoke-static {}, Lradiant/PebbleBridge;->access$100()Lradiant/PebbleBridge;
+
+    move-result-object v0
+
+    # invokes: Lradiant/PebbleBridge;->sendLyrics()V
+    invoke-static {v0}, Lradiant/PebbleBridge;->access$200(Lradiant/PebbleBridge;)V
+
+    :cond_d
+    return-void
+.end method

patches/integration-pebble-lyrics.patch

@@ -0,0 +1,30 @@
+--- a/radiant/RLAPILyricsWorker.smali
++++ b/radiant/RLAPILyricsWorker.smali
+@@ -794,6 +794,12 @@
+     :got_body
+     move-object v11, v3
+ 
++    iget-object v4, p0, Lradiant/RLAPILyricsWorker;->key:Ljava/lang/String;
++
++    iget-object v5, p0, Lradiant/RLAPILyricsWorker;->title:Ljava/lang/String;
++
++    invoke-static {v4, v5, v3}, Lradiant/PebbleBridge;->onLyrics(Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;)V
++
+     invoke-static {v3}, Lradiant/RLAPILyricsWorker;->parseLines(Ljava/lang/String;)Ljava/util/ArrayList;
+ 
+     move-result-object v3
+@@ -911,6 +917,14 @@
+     return-void
+ 
+     :request_failed
++    iget-object v0, p0, Lradiant/RLAPILyricsWorker;->key:Ljava/lang/String;
++
++    iget-object v1, p0, Lradiant/RLAPILyricsWorker;->title:Ljava/lang/String;
++
++    const/4 v2, 0x0
++
++    invoke-static {v0, v1, v2}, Lradiant/PebbleBridge;->onLyrics(Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;)V
++
+     invoke-direct {p0}, Lradiant/RLAPILyricsWorker;->failCurrent()V
+ 
+     return-void

patches/integration-pebble-playback.patch

@@ -0,0 +1,31 @@
+--- a/com/aspiro/wamp/player/MusicService.smali
++++ b/com/aspiro/wamp/player/MusicService.smali
+@@ -1495,6 +1495,8 @@
+     .line 36
+     invoke-virtual {p1, v0}, Landroid/support/v4/media/session/MediaSessionCompat;->setPlaybackState(Landroid/support/v4/media/session/PlaybackStateCompat;)V
+ 
++    invoke-static {p0, p1}, Lradiant/PebbleBridge;->onState(Landroid/content/Context;Landroid/support/v4/media/session/MediaSessionCompat;)V
++
+     .line 37
+     .line 38
+     .line 39
+@@ -2669,6 +2671,8 @@
+     .line 1
+     invoke-super {p0}, Landroidx/media/MediaBrowserServiceCompat;->onDestroy()V
+ 
++    invoke-static {}, Lradiant/PebbleBridge;->onDestroy()V
++
+     .line 2
+     .line 3
+     .line 4
+--- a/bk0/e.smali
++++ b/bk0/e.smali
+@@ -56,6 +56,8 @@
+     .line 6
+     move-result-wide v0
+ 
++    invoke-static {v0, v1}, Lradiant/PebbleBridge;->onPosition(J)V
++
+     .line 7
+     iget-object v2, p0, Lbk0/e;->a:Lbk0/d;
+ 

patches/manifest.json

@@ -780,6 +780,30 @@
         }
       ]
     },
+    {
+      "id": "PebbleIntegration",
+      "order": 91,
+      "category": "integration",
+      "fileNames": [
+        "integration-pebble-playback.patch",
+        "integration-pebble-lyrics.patch"
+      ],
+      "extensionFiles": [
+        "radiant/PebbleBridge.smali",
+        "radiant/PebbleBridge$1.smali",
+        "radiant/PebbleBridge$2.smali"
+      ],
+      "title": "Pebble Watch",
+      "description": "Shows synced lyrics on your Pebble Time 2 when listening, Everything is configured and managed in the Pebble App",
+      "default": false,
+      "requires": [
+        "LyricsRlApi"
+      ],
+      "companionApp": {
+        "storeId": "02b779dcf9084fecb0375df1",
+        "storeSource": "https://appstore-api.repebble.com/api"
+      }
+    },
     {
       "id": "DebugMenuUnlock",
       "order": 100,

tools/pebble-bridge-build/build.sh

@@ -0,0 +1,44 @@
+#!/usr/bin/env bash
+# Builds PebbleBridge*.smali into patches/extension/radiant
+# Stubs only satisfy javac
+set -euo pipefail
+
+here="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+repo="$(cd "$here/../.." && pwd)"
+
+ANDROID_SDK="${ANDROID_SDK:-${ANDROID_HOME:-$HOME/Android/Sdk}}"
+ANDROID_JAR="${ANDROID_JAR:-$(ls -d "$ANDROID_SDK"/platforms/android-3*/android.jar | sort -V | tail -1)}"
+D8="${D8:-$(ls -d "$ANDROID_SDK"/build-tools/*/d8 | sort -V | tail -1)}"
+# baksmali and its deps
+SMALI_CP="${SMALI_CP:-$(ls "$HOME"/.cache/rlpb/tools/*.jar | tr '\n' :)}"
+
+javac="${JAVA_HOME:+$JAVA_HOME/bin/}javac"
+java="${JAVA_HOME:+$JAVA_HOME/bin/}java"
+out="$here/build"
+
+rm -rf "$out"
+mkdir -p "$out/stubs" "$out/classes" "$out/dex" "$out/smali"
+
+echo "==> javac stubs"
+find "$here/stubs" -name '*.java' > "$out/stubs.list"
+"$javac" -nowarn -g:none --release 8 -cp "$ANDROID_JAR" -d "$out/stubs" @"$out/stubs.list" 2>&1 |
+    grep -v 'bootstrap class path\|source value 8\|target value 8\|deprecat\|^[0-9] warning' || true
+
+echo "==> javac sources"
+find "$here/src" -name '*.java' > "$out/src.list"
+"$javac" -nowarn -g:none --release 8 -cp "$ANDROID_JAR:$out/stubs" -d "$out/classes" @"$out/src.list" 2>&1 |
+    grep -v 'bootstrap class path\|source value 8\|target value 8\|deprecat\|^[0-9] warning' || true
+
+echo "==> d8"
+find "$out/classes" -name '*.class' > "$out/class.list"
+bash "$D8" --min-api 24 --no-desugaring --lib "$ANDROID_JAR" --classpath "$out/stubs" \
+      --output "$out/dex" @"$out/class.list"
+
+echo "==> baksmali"
+"$java" -cp "$SMALI_CP" com.android.tools.smali.baksmali.Main d "$out/dex/classes.dex" -o "$out/smali"
+
+echo "==> copy"
+dest="$repo/patches/extension/radiant"
+rm -f "$dest"/PebbleBridge*.smali
+cp "$out"/smali/radiant/PebbleBridge*.smali "$dest/"
+echo "==> wrote $dest"

tools/pebble-bridge-build/src/radiant/PebbleBridge.java

@@ -0,0 +1,299 @@
+package radiant;
+
+import android.content.ComponentName;
+import android.content.Context;
+import android.content.Intent;
+import android.content.ServiceConnection;
+import android.media.MediaMetadata;
+import android.media.session.MediaController;
+import android.media.session.MediaSession;
+import android.media.session.PlaybackState;
+import android.os.Bundle;
+import android.os.Handler;
+import android.os.IBinder;
+import android.os.Looper;
+import android.os.Message;
+import android.os.Messenger;
+import android.os.SystemClock;
+import android.support.v4.media.session.MediaSessionCompat;
+import android.util.Log;
+
+// Sends TIDAL playback and lyrics to the Manager relay
+public final class PebbleBridge implements ServiceConnection {
+    private static final String TAG = "RLPebble";
+    private static final String MANAGER_PACKAGE = "com.meowarex.rlmobile";
+    private static final String RELAY_SERVICE = "com.meowarex.rlmobile.pebble.PebbleRelayService";
+
+    // Keep in sync with PebbleRelayService
+    private static final int MSG_SESSION = 1;
+    private static final int MSG_POSITION = 2;
+    private static final int MSG_LYRICS = 3;
+
+    // Resend when drift exceeds this
+    private static final long TOLERANCE_MS = 15L;
+    private static final long KEEPALIVE_MS = 5000L;
+
+    private static final Handler MAIN = new Handler(Looper.getMainLooper());
+    private static final Object LOCK = new Object();
+
+    private static PebbleBridge instance;
+
+    // Written by the player thread
+    private static long rawPosition = -1L;
+    private static long rawAt;
+
+    // Written by the lyrics worker
+    private static String lyricsKey;
+    private static String lyricsTitle;
+    private static String lyricsBody;
+    private static boolean lyricsFailed;
+
+    private final Context context;
+    private MediaSession.Token token;
+    private MediaController controller;
+    private Messenger relay;
+    private boolean bound;
+    private long retryBindAt;
+
+    private boolean playing;
+    private String mediaId;
+    private long sentPosition = -1L;
+    private long sentAt;
+    private boolean sentPlaying;
+    private long lastSendAt;
+
+    private PebbleBridge(Context context) {
+        this.context = context;
+    }
+
+    public static void onState(Context service, MediaSessionCompat session) {
+        try {
+            if (instance == null) {
+                Context app = service.getApplicationContext();
+                instance = new PebbleBridge(app != null ? app : service);
+            }
+            instance.update(session);
+        } catch (Throwable t) {
+            Log.w(TAG, "onState failed", t);
+        }
+    }
+
+    public static void onDestroy() {
+        try {
+            if (instance != null) {
+                instance.release();
+                instance = null;
+            }
+        } catch (Throwable t) {
+            Log.w(TAG, "onDestroy failed", t);
+        }
+    }
+
+    // Player thread, after getCurrentPosition
+    public static void onPosition(long position) {
+        final long at = SystemClock.elapsedRealtime();
+        synchronized (LOCK) {
+            rawPosition = position;
+            rawAt = at;
+        }
+        if (instance == null) return;
+        if (Looper.myLooper() == Looper.getMainLooper()) {
+            onSample(position, at);
+        } else {
+            MAIN.post(new Runnable() {
+                @Override
+                public void run() {
+                    onSample(position, at);
+                }
+            });
+        }
+    }
+
+    // Lyrics worker thread, null body means failed
+    public static void onLyrics(String key, String title, String body) {
+        synchronized (LOCK) {
+            if (body == null && key != null && key.equals(lyricsKey) && lyricsBody != null) {
+                // Keep a body that had no lines
+                return;
+            }
+            lyricsKey = key;
+            lyricsTitle = title;
+            lyricsBody = body;
+            lyricsFailed = body == null;
+        }
+        MAIN.post(new Runnable() {
+            @Override
+            public void run() {
+                if (instance != null) instance.sendLyrics();
+            }
+        });
+    }
+
+    private static void onSample(long position, long at) {
+        PebbleBridge bridge = instance;
+        if (bridge != null) bridge.consider(position, at, false);
+    }
+
+    private void update(MediaSessionCompat session) {
+        if (session == null) return;
+        MediaSessionCompat.Token compat = session.getSessionToken();
+        Object raw = compat != null ? compat.getToken() : null;
+        if (!(raw instanceof MediaSession.Token)) return;
+
+        if (!raw.equals(token)) {
+            token = (MediaSession.Token) raw;
+            controller = new MediaController(context, token);
+            sendSession();
+        }
+
+        if (!bound && SystemClock.elapsedRealtime() >= retryBindAt) {
+            Intent intent = new Intent().setComponent(new ComponentName(MANAGER_PACKAGE, RELAY_SERVICE));
+            try {
+                bound = context.bindService(intent, this, Context.BIND_AUTO_CREATE);
+            } catch (Throwable t) {
+                bound = false;
+            }
+            if (!bound) {
+                // Manager missing, retry in a minute
+                retryBindAt = SystemClock.elapsedRealtime() + 60000L;
+                try {
+                    context.unbindService(this);
+                } catch (Throwable ignored) {
+                }
+                Log.i(TAG, "RL Manager relay not available");
+            }
+        }
+
+        boolean wasPlaying = playing;
+        playing = readPlaying();
+        MediaMetadata metadata = controller != null ? controller.getMetadata() : null;
+        String id = metadata != null ? metadata.getString(MediaMetadata.METADATA_KEY_MEDIA_ID) : null;
+        boolean trackChanged = id != null && !id.equals(mediaId);
+        mediaId = id;
+
+        if (trackChanged) {
+            // Next poll sends the new track
+            sentPosition = -1L;
+        } else if (wasPlaying != playing) {
+            // Don't wait for the next poll
+            sendLatest(wasPlaying);
+        }
+    }
+
+    // Extrapolates the last reading to now
+    private void sendLatest(boolean advance) {
+        long position;
+        long at;
+        synchronized (LOCK) {
+            position = rawPosition;
+            at = rawAt;
+        }
+        if (position < 0) return;
+        long now = SystemClock.elapsedRealtime();
+        consider(advance ? position + (now - at) : position, now, true);
+    }
+
+    private boolean readPlaying() {
+        PlaybackState state = controller != null ? controller.getPlaybackState() : null;
+        return state != null && state.getState() == PlaybackState.STATE_PLAYING;
+    }
+
+    private void consider(long position, long at, boolean force) {
+        long predicted = sentPlaying ? sentPosition + (at - sentAt) : sentPosition;
+        boolean drifted = sentPosition < 0 || Math.abs(position - predicted) > TOLERANCE_MS;
+        if (!force && !drifted && sentPlaying == playing && at - lastSendAt < KEEPALIVE_MS) return;
+        if (sendPosition(position, at)) {
+            sentPosition = position;
+            sentAt = at;
+            sentPlaying = playing;
+            lastSendAt = at;
+        }
+    }
+
+    private void release() {
+        if (bound) {
+            try {
+                context.unbindService(this);
+            } catch (Throwable ignored) {
+            }
+        }
+        bound = false;
+        relay = null;
+    }
+
+    private void sendSession() {
+        if (relay == null || token == null) return;
+        Bundle data = new Bundle();
+        data.putParcelable("token", token);
+        data.putString("package", context.getPackageName());
+        send(MSG_SESSION, data);
+    }
+
+    private boolean sendPosition(long position, long at) {
+        if (relay == null) return false;
+        Bundle data = new Bundle();
+        data.putLong("position", position);
+        data.putLong("elapsedRealtime", at);
+        data.putBoolean("playing", playing);
+        if (mediaId != null) data.putString("mediaId", mediaId);
+        return send(MSG_POSITION, data);
+    }
+
+    private void sendLyrics() {
+        if (relay == null) return;
+        Bundle data = new Bundle();
+        synchronized (LOCK) {
+            if (lyricsKey == null) return;
+            data.putString("key", lyricsKey);
+            data.putString("title", lyricsTitle);
+            if (lyricsBody != null) data.putString("body", lyricsBody);
+            data.putBoolean("failed", lyricsFailed);
+        }
+        send(MSG_LYRICS, data);
+    }
+
+    private boolean send(int what, Bundle data) {
+        Messenger target = relay;
+        if (target == null) return false;
+        try {
+            Message message = Message.obtain(null, what);
+            message.setData(data);
+            target.send(message);
+            return true;
+        } catch (Throwable t) {
+            relay = null;
+            return false;
+        }
+    }
+
+    @Override
+    public void onServiceConnected(ComponentName name, IBinder service) {
+        relay = new Messenger(service);
+        sendSession();
+        sentPosition = -1L;
+        sendLatest(playing);
+        sendLyrics();
+    }
+
+    @Override
+    public void onServiceDisconnected(ComponentName name) {
+        relay = null;
+    }
+
+    @Override
+    public void onBindingDied(ComponentName name) {
+        relay = null;
+        if (bound) {
+            try {
+                context.unbindService(this);
+            } catch (Throwable ignored) {
+            }
+            bound = false;
+        }
+    }
+
+    @Override
+    public void onNullBinding(ComponentName name) {
+        onBindingDied(name);
+    }
+}

tools/pebble-bridge-build/stubs/android/support/v4/media/session/MediaSessionCompat.java

@@ -0,0 +1,9 @@
+package android.support.v4.media.session;
+
+public class MediaSessionCompat {
+    public Token getSessionToken() { return null; }
+
+    public static final class Token {
+        public Object getToken() { return null; }
+    }
+}