[Android] Improve the playback speed display and control on Android Auto

[Nicolas Pomepuy]

vlc-android | branch: master | Nicolas Pomepuy <nicolas at videolabs.io> | Wed Sep  3 14:03:06 2025 +0200| [c476a8a095b7bc3ac143b4990b7ca9674805afd5] | committer: Nicolas Pomepuy

Improve the playback speed display and control on Android Auto

The action to change the speed will only be shown if the setting is checked.
Also the value will be shown before the subtitle, including the info if it's global.

> https://code.videolan.org/videolan/vlc-android/commit/c476a8a095b7bc3ac143b4990b7ca9674805afd5
---

 .../src/org/videolan/vlc/PlaybackService.kt        | 24 ++++++++++++----------
 1 file changed, 13 insertions(+), 11 deletions(-)

diff --git a/application/vlc-android/src/org/videolan/vlc/PlaybackService.kt b/application/vlc-android/src/org/videolan/vlc/PlaybackService.kt
index ec2939ca13..f7711ff688 100644
--- a/application/vlc-android/src/org/videolan/vlc/PlaybackService.kt
+++ b/application/vlc-android/src/org/videolan/vlc/PlaybackService.kt
@@ -150,12 +150,14 @@ import org.videolan.tools.KEY_AUDIO_TASK_REMOVED
 import org.videolan.tools.KEY_ENABLE_HEADSET_DETECTION
 import org.videolan.tools.KEY_ENABLE_PLAY_ON_HEADSET_INSERTION
 import org.videolan.tools.KEY_METERED_CONNECTION
+import org.videolan.tools.KEY_PLAYBACK_SPEED_AUDIO_GLOBAL
 import org.videolan.tools.KEY_VIDEO_APP_SWITCH
 import org.videolan.tools.LOCKSCREEN_COVER
 import org.videolan.tools.POSITION_IN_AUDIO_LIST
 import org.videolan.tools.POSITION_IN_SONG
 import org.videolan.tools.SHOW_SEEK_IN_COMPACT_NOTIFICATION
 import org.videolan.tools.Settings
+import org.videolan.tools.formatRateString
 import org.videolan.tools.getContextWithLocale
 import org.videolan.tools.getResourceUri
 import org.videolan.tools.markBidi
@@ -269,11 +271,6 @@ class PlaybackService : MediaBrowserServiceCompat(), LifecycleOwner, CoroutineSc
      */
     lateinit var mediaBrowserCompat:MediaBrowserCompat
 
-    /**
-     * Once a media has shown the speed action once,
-     * continue showing it until the media changes even if the other conditions are not met
-     */
-    private var forceAutoShowSpeed:Pair<String?, Boolean> = Pair(null, false)
 
 
     private val receiver = object : BroadcastReceiver() {
@@ -1183,6 +1180,13 @@ class PlaybackService : MediaBrowserServiceCompat(), LifecycleOwner, CoroutineSc
                 putLong(MediaMetadataCompat.METADATA_KEY_DURATION, if (length != 0L) length else -1L)
             }
             if (carMode) {
+                val speedStr = buildString {
+                    append(speed.formatRateString())
+                    if (settings.getBoolean(KEY_PLAYBACK_SPEED_AUDIO_GLOBAL, false))
+                        append(" (${getString(R.string.playback_speed_all_tracks)})")
+                    else
+                        append(" (${getString(R.string.playback_speed_this_track)})")
+                }
                 var carTitle = title
                 var carSubtitle = MediaUtils.getDisplaySubtitle(ctx, media)
                 val shortQueue = settings.getInt(KEY_ANDROID_AUTO_QUEUE_FORMAT_VAL, 1) == 0
@@ -1194,6 +1198,7 @@ class PlaybackService : MediaBrowserServiceCompat(), LifecycleOwner, CoroutineSc
                     2 -> carTitle = TextUtils.separatedString(carTitle.markBidi(), queueInfo)
                     3 -> carSubtitle = TextUtils.separatedString(queueInfo, carSubtitle)
                 }
+                if (speed != 1F) carSubtitle = TextUtils.separatedString(speedStr, carSubtitle)
                 /**
                  * This section allows for variability in the title and subtitle contents.
                  */
@@ -1358,10 +1363,7 @@ class PlaybackService : MediaBrowserServiceCompat(), LifecycleOwner, CoroutineSc
     }
 
     private fun addCustomSpeedActions(pscb: PlaybackStateCompat.Builder, showSpeedActions: Boolean = true) {
-        if (speed != 1.0F || showSpeedActions || ( currentMediaWrapper?.uri != null && forceAutoShowSpeed.first == currentMediaWrapper?.uri?.toString() && forceAutoShowSpeed.second)) {
-            currentMediaWrapper?.uri?.let {
-                forceAutoShowSpeed = Pair(it.toString(), true)
-            }
+        if (showSpeedActions) {
             val speedIcons = hashMapOf(
                     0.50f to R.drawable.ic_auto_speed_0_50,
                     0.80f to R.drawable.ic_auto_speed_0_80,
@@ -1374,7 +1376,7 @@ class PlaybackService : MediaBrowserServiceCompat(), LifecycleOwner, CoroutineSc
             val speedResId = speedIcons[speedIcons.keys.minByOrNull { (speed - it).absoluteValue }]
                     ?: R.drawable.ic_auto_speed
             pscb.addCustomAction(CUSTOM_ACTION_SPEED, getString(R.string.playback_speed), speedResId)
-        } else forceAutoShowSpeed = Pair(null, false)
+        }
     }
 
     fun notifyTrackChanged() {
@@ -1777,7 +1779,7 @@ class PlaybackService : MediaBrowserServiceCompat(), LifecycleOwner, CoroutineSc
     fun setRate(rate: Float, save: Boolean) {
         playlistManager.player.setRate(rate, save)
         lifecycleScope.launch(Dispatchers.Main) {
-            publishState()
+            executeUpdate(true)
         }
     }