Ask for record audio permission when enabling visualizer

app/src/main/java/com/github/damontecres/wholphin/ui/detail/music/MusicViewOptionsDialog.kt

@@ -18,6 +18,7 @@ import androidx.compose.runtime.remember
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.focus.FocusRequester
 import androidx.compose.ui.focus.focusRequester
+import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.platform.LocalView
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.unit.dp
@@ -38,11 +39,15 @@ fun MusicViewOptionsDialog(
     appPreferences: AppPreferences,
     onDismissRequest: () -> Unit,
     onViewOptionsChange: (AppPreferences) -> Unit,
+    onEnableVisualizer: () -> Unit,
 ) {
+    val context = LocalContext.current
+
     val focusRequester = remember { FocusRequester() }
     LaunchedEffect(Unit) { focusRequester.tryRequestFocus() }
     val columnState = rememberLazyListState()
     val items = remember { getMusicPreferences() }
+
     Dialog(
         onDismissRequest = onDismissRequest,
         properties =
@@ -55,6 +60,7 @@ fun MusicViewOptionsDialog(
             window.setGravity(Gravity.END)
             window.setDimAmount(0f)
         }
+
         Column {
             Text(
                 text = stringResource(R.string.view_options),
@@ -79,18 +85,48 @@ fun MusicViewOptionsDialog(
                 pref as AppPreference<AppPreferences, Any>
                 val interactionSource = remember { MutableInteractionSource() }
                 val value = pref.getter.invoke(appPreferences)
-                ComposablePreference(
-                    preference = pref,
-                    value = value,
-                    onNavigate = {},
-                    onValueChange = { newValue ->
-                        onViewOptionsChange.invoke(pref.setter(appPreferences, newValue))
-                    },
-                    interactionSource = interactionSource,
-                    modifier = Modifier,
-                    onClickPreference = { pref ->
-                    },
-                )
+                // Using title is a bit hacky
+                when (pref.title) {
+                    R.string.show_visualizer -> {
+                        ComposablePreference(
+                            preference = pref,
+                            value = value,
+                            onNavigate = {},
+                            onValueChange = { newValue ->
+                                newValue as Boolean
+                                if (newValue) {
+                                    onEnableVisualizer.invoke()
+                                } else {
+                                    onViewOptionsChange.invoke(
+                                        pref.setter(
+                                            appPreferences,
+                                            newValue,
+                                        ),
+                                    )
+                                }
+                            },
+                            interactionSource = interactionSource,
+                            modifier = Modifier,
+                            onClickPreference = { pref ->
+                            },
+                        )
+                    }
+
+                    else -> {
+                        ComposablePreference(
+                            preference = pref,
+                            value = value,
+                            onNavigate = {},
+                            onValueChange = { newValue ->
+                                onViewOptionsChange.invoke(pref.setter(appPreferences, newValue))
+                            },
+                            interactionSource = interactionSource,
+                            modifier = Modifier,
+                            onClickPreference = { pref ->
+                            },
+                        )
+                    }
+                }
             }
         }
     }

app/src/main/java/com/github/damontecres/wholphin/ui/detail/music/NowPlayingPage.kt

@@ -1,7 +1,10 @@
 package com.github.damontecres.wholphin.ui.detail.music
 
+import android.Manifest
 import android.view.Gravity
 import androidx.activity.compose.BackHandler
+import androidx.activity.compose.rememberLauncherForActivityResult
+import androidx.activity.result.contract.ActivityResultContracts
 import androidx.annotation.OptIn
 import androidx.compose.animation.AnimatedVisibility
 import androidx.compose.animation.core.animateFloatAsState
@@ -41,6 +44,7 @@ import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.unit.dp
 import androidx.hilt.lifecycle.viewmodel.compose.hiltViewModel
 import androidx.media3.common.util.UnstableApi
+import androidx.tv.material3.Button
 import androidx.tv.material3.MaterialTheme
 import androidx.tv.material3.Text
 import coil3.compose.AsyncImage
@@ -49,9 +53,11 @@ import com.github.damontecres.wholphin.data.model.AudioItem
 import com.github.damontecres.wholphin.preferences.AppPreferences
 import com.github.damontecres.wholphin.preferences.UserPreferences
 import com.github.damontecres.wholphin.services.rememberQueue
+import com.github.damontecres.wholphin.ui.components.BasicDialog
 import com.github.damontecres.wholphin.ui.components.DialogParams
 import com.github.damontecres.wholphin.ui.components.DialogPopup
 import com.github.damontecres.wholphin.ui.components.LoadingPage
+import com.github.damontecres.wholphin.ui.findActivity
 import com.github.damontecres.wholphin.ui.playback.BottomDialog
 import com.github.damontecres.wholphin.ui.playback.BottomDialogItem
 import com.github.damontecres.wholphin.ui.playback.PlaybackKeyHandler
@@ -141,6 +147,14 @@ fun NowPlayingPage(
         focusRequester.tryRequestFocus()
     }
 
+    var showRationaleDialog by remember { mutableStateOf(false) }
+    val launcher =
+        rememberLauncherForActivityResult(
+            ActivityResultContracts.RequestPermission(),
+        ) { isGranted ->
+            viewModel.startVisualizer(isGranted, true)
+        }
+
     Box(modifier) {
         Box(
             modifier =
@@ -317,6 +331,34 @@ fun NowPlayingPage(
             appPreferences = preferences,
             onDismissRequest = { showViewOptionsDialog = false },
             onViewOptionsChange = { viewModel.updatePreferences(it) },
+            onEnableVisualizer = {
+                val showRationale =
+                    context
+                        .findActivity()
+                        ?.shouldShowRequestPermissionRationale(Manifest.permission.RECORD_AUDIO) == true
+                when {
+                    !state.visualizerPermissions && showRationale -> {
+                        showRationaleDialog = true
+                    }
+
+                    !state.visualizerPermissions -> {
+                        launcher.launch(Manifest.permission.RECORD_AUDIO)
+                    }
+
+                    else -> {
+                        viewModel.startVisualizer(true, true)
+                    }
+                }
+            },
+        )
+    }
+    if (showRationaleDialog) {
+        RecordAudioRationaleDialog(
+            onDismissRequest = { showRationaleDialog = false },
+            onClick = {
+                showRationaleDialog = false
+                launcher.launch(Manifest.permission.RECORD_AUDIO)
+            },
         )
     }
 }
@@ -356,3 +398,31 @@ fun NowPlayingBottomDialog(
         gravity = Gravity.START,
     )
 }
+
+@Composable
+private fun RecordAudioRationaleDialog(
+    onDismissRequest: () -> Unit,
+    onClick: () -> Unit,
+) {
+    BasicDialog(
+        onDismissRequest = onDismissRequest,
+    ) {
+        Column(
+            verticalArrangement = Arrangement.spacedBy(16.dp),
+            modifier = Modifier.padding(16.dp),
+        ) {
+            Text(
+                text = stringResource(R.string.visualizer_rationale),
+                color = MaterialTheme.colorScheme.onSurface,
+            )
+            Button(
+                onClick = onClick,
+                modifier = Modifier.align(Alignment.CenterHorizontally),
+            ) {
+                Text(
+                    text = stringResource(R.string.continue_string),
+                )
+            }
+        }
+    }
+}

app/src/main/java/com/github/damontecres/wholphin/ui/detail/music/NowPlayingState.kt

@@ -9,6 +9,7 @@ data class NowPlayingState(
     val musicServiceState: MusicServiceState,
     val lyrics: LyricDto? = null,
     val currentLyricIndex: Int? = null,
+    val visualizerPermissions: Boolean = false,
 ) {
     val hasLyrics: Boolean get() = lyrics != null && lyrics.lyrics.isNotEmpty()
 }

app/src/main/java/com/github/damontecres/wholphin/ui/detail/music/NowPlayingViewModel.kt

@@ -1,6 +1,10 @@
 package com.github.damontecres.wholphin.ui.detail.music
 
+import android.Manifest
+import android.content.Context
+import android.content.pm.PackageManager
 import android.media.audiofx.Visualizer
+import androidx.core.content.ContextCompat
 import androidx.datastore.core.DataStore
 import androidx.lifecycle.ViewModel
 import androidx.lifecycle.viewModelScope
@@ -11,6 +15,7 @@ import com.github.damontecres.wholphin.data.model.AudioItem
 import com.github.damontecres.wholphin.data.model.BaseItem
 import com.github.damontecres.wholphin.preferences.AppPreference
 import com.github.damontecres.wholphin.preferences.AppPreferences
+import com.github.damontecres.wholphin.preferences.updateMusicPreferences
 import com.github.damontecres.wholphin.services.BackdropService
 import com.github.damontecres.wholphin.services.MusicService
 import com.github.damontecres.wholphin.services.NavigationManager
@@ -24,13 +29,17 @@ import com.mayakapps.kache.InMemoryKache
 import dagger.assisted.AssistedFactory
 import dagger.assisted.AssistedInject
 import dagger.hilt.android.lifecycle.HiltViewModel
+import dagger.hilt.android.qualifiers.ApplicationContext
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.delay
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.collectLatest
+import kotlinx.coroutines.flow.first
 import kotlinx.coroutines.flow.update
 import kotlinx.coroutines.isActive
+import kotlinx.coroutines.sync.Mutex
+import kotlinx.coroutines.sync.withLock
 import org.jellyfin.sdk.api.client.ApiClient
 import org.jellyfin.sdk.api.client.extensions.lyricsApi
 import org.jellyfin.sdk.api.client.extensions.userLibraryApi
@@ -48,6 +57,7 @@ import kotlin.time.Duration.Companion.milliseconds
 class NowPlayingViewModel
     @AssistedInject
     constructor(
+        @param:ApplicationContext private val context: Context,
         private val api: ApiClient,
         private val musicService: MusicService,
         private val backdropService: BackdropService,
@@ -62,6 +72,7 @@ class NowPlayingViewModel
             fun create(): NowPlayingViewModel
         }
 
+        private val visualizerMutex = Mutex()
         private var visualizer: Visualizer? = null
 
         val controllerViewState =
@@ -87,25 +98,16 @@ class NowPlayingViewModel
                 player.removeListener(this)
                 visualizer?.release()
             }
+            val visualizerPermissions =
+                ContextCompat.checkSelfPermission(
+                    context,
+                    Manifest.permission.RECORD_AUDIO,
+                ) == PackageManager.PERMISSION_GRANTED
+            startVisualizer(visualizerPermissions, false)
             viewModelScope.launchDefault {
                 musicService.state.collectLatest { musicServiceState ->
                     if (musicServiceState.status != NowPlayingStatus.IDLE) {
-                        viewModelScope.launchDefault {
-                            if (visualizer == null) {
-                                visualizer =
-                                    Visualizer(onMain { player.audioSessionId }).apply {
-                                        captureSize = Visualizer.getCaptureSizeRange()[1]
-                                        setDataCaptureListener(
-                                            this@NowPlayingViewModel,
-                                            Visualizer.getMaxCaptureRate() / 2,
-                                            true,
-                                            false,
-                                        )
-                                    }
-                            }
-                            visualizer?.enabled =
-                                musicServiceState.status == NowPlayingStatus.PLAYING
-                        }
+                        visualizer?.enabled = musicServiceState.status == NowPlayingStatus.PLAYING
                     }
 
                     state.update { it.copy(musicServiceState = musicServiceState) }
@@ -294,4 +296,49 @@ class NowPlayingViewModel
                 }
             }
         }
+
+        private fun initVisualizer() {
+            viewModelScope.launchDefault {
+                visualizerMutex.withLock {
+                    val prefs = preferencesDataStore.data.first()
+                    if (visualizer == null &&
+                        state.value.visualizerPermissions &&
+                        prefs.musicPreferences.showVisualizer
+                    ) {
+                        Timber.v("Creating visualizer")
+                        visualizer =
+                            Visualizer(onMain { player.audioSessionId }).apply {
+                                captureSize = Visualizer.getCaptureSizeRange()[1]
+                                setDataCaptureListener(
+                                    this@NowPlayingViewModel,
+                                    Visualizer.getMaxCaptureRate() / 2,
+                                    true,
+                                    false,
+                                )
+                                enabled = true
+                            }
+                    }
+                }
+            }
+        }
+
+        fun startVisualizer(
+            permissionGranted: Boolean,
+            updatePreferences: Boolean,
+        ) {
+            Timber.v("startVisualizer: permissionGranted=%s", permissionGranted)
+            state.update {
+                it.copy(
+                    visualizerPermissions = permissionGranted,
+                )
+            }
+            viewModelScope.launchDefault {
+                if (updatePreferences || !permissionGranted) {
+                    preferencesDataStore.updateData {
+                        it.updateMusicPreferences { showVisualizer = permissionGranted }
+                    }
+                }
+                initVisualizer()
+            }
+        }
     }

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

@@ -742,6 +742,8 @@
     <string name="show_visualizer">Show visualizer</string>
     <string name="show_backdrop">Show backdrop</string>
     <string name="play_as_type">Play as?</string>
+    <string name="visualizer_rationale">Visualizing the currently playing audio requires permission to record audio.</string>
+    <string name="continue_string">Continue</string>
 
 
 </resources>