Use AudioTrack.isDirectPlaybackSupported on TVs only

Issue: #9239

#minor-release

PiperOrigin-RevId: 388437614

RELEASENOTES.md

@@ -51,6 +51,10 @@
         behavior of track and location fallback. Location fallback is currently
         only supported for DASH manifests with multiple base URLs.
     *   Disable platform transcoding when playing content URIs on Android 12.
+    *   Restrict use of `AudioTrack.isDirectPlaybackSupported` to TVs, to avoid
+        listing audio offload encodings as supported for passthrough mode on
+        mobile devices
+        ([#9239](https://github.com/google/ExoPlayer/issues/9239)).
 *   Remove deprecated symbols:
     *   Remove `Player.getPlaybackError`. Use `Player.getPlayerError` instead.
     *   Remove `Player.getCurrentTag`. Use `Player.getCurrentMediaItem` and

library/core/src/main/java/com/google/android/exoplayer2/audio/AudioCapabilities.java

@@ -88,9 +88,12 @@ public static AudioCapabilities getCapabilities(Context context) {
         && Global.getInt(context.getContentResolver(), EXTERNAL_SURROUND_SOUND_KEY, 0) == 1) {
       return EXTERNAL_SURROUND_SOUND_CAPABILITIES;
     }
-    if (Util.SDK_INT >= 29) {
+    // AudioTrack.isDirectPlaybackSupported returns true for encodings that are supported for audio
+    // offload, as well as for encodings we want to list for passthrough mode. Therefore we only use
+    // it on TV devices, which generally shouldn't support audio offload for surround encodings.
+    if (Util.SDK_INT >= 29 && Util.isTv(context)) {
       return new AudioCapabilities(
-          AudioTrackWrapperV29.getDirectPlaybackSupportedEncodingsV29(), DEFAULT_MAX_CHANNEL_COUNT);
+          Api29.getDirectPlaybackSupportedEncodingsV29(), DEFAULT_MAX_CHANNEL_COUNT);
     }
     if (intent == null || intent.getIntExtra(AudioManager.EXTRA_AUDIO_PLUG_STATE, 0) == 0) {
       return DEFAULT_AUDIO_CAPABILITIES;
@@ -185,7 +188,7 @@ private static boolean deviceMaySetExternalSurroundSoundGlobalSetting() {
   }
 
   @RequiresApi(29)
-  private static final class AudioTrackWrapperV29 {
+  private static final class Api29 {
     @DoNotInline
     public static int[] getDirectPlaybackSupportedEncodingsV29() {
       ImmutableList.Builder<Integer> supportedEncodingsListBuilder = ImmutableList.builder();