Support setPlaybackSpeed(float) with the MediaSessionConnector

Issue: #8229
#exofixit
PiperOrigin-RevId: 346968046

RELEASENOTES.md

@@ -116,6 +116,10 @@
  * Notify onBufferingEnded when the state of origin player becomes
  `STATE_IDLE` or `STATE_ENDED`.
  * Allow to remove all playlist items that makes the player reset.
+* MediaSession extension:
+ * Support `setPlaybackSpeed(float)` and disable it by default. Use
+ `MediaSessionConnector.setEnabledPlaybackActions(long)` to enable
+ ([#8229](https:/google/ExoPlayer/issues/8229)).
 
 ### 2.12.1 (2020-10-23) ###
 

constants.gradle

@@ -32,7 +32,7 @@ project.ext {
  androidxAnnotationVersion = '1.1.0'
  androidxAppCompatVersion = '1.1.0'
  androidxCollectionVersion = '1.1.0'
- androidxMediaVersion = '1.0.1'
+ androidxMediaVersion = '1.2.1'
  androidxMultidexVersion = '2.0.0'
  androidxRecyclerViewVersion = '1.1.0'
  androidxTestCoreVersion = '1.3.0'

extensions/mediasession/src/main/java/com/google/android/exoplayer2/ext/mediasession/MediaSessionConnector.java

@@ -101,6 +101,10 @@ public final class MediaSessionConnector {
  ExoPlayerLibraryInfo.registerModule("goog.exo.mediasession");
  }
 
+ /** Indicates this session supports the set playback speed command. */
+ // TODO(b/174297519) Replace with PlaybackStateCompat.ACTION_SET_PLAYBACK_SPEED when released.
+ public static final long ACTION_SET_PLAYBACK_SPEED = 1 << 22;
+
  /** Playback actions supported by the connector. */
  @LongDef(
  flag = true,
@@ -113,7 +117,8 @@ public final class MediaSessionConnector {
  PlaybackStateCompat.ACTION_REWIND,
  PlaybackStateCompat.ACTION_STOP,
  PlaybackStateCompat.ACTION_SET_REPEAT_MODE,
- PlaybackStateCompat.ACTION_SET_SHUFFLE_MODE
+ PlaybackStateCompat.ACTION_SET_SHUFFLE_MODE,
+ ACTION_SET_PLAYBACK_SPEED
  })
  @Retention(RetentionPolicy.SOURCE)
  public @interface PlaybackActions {}
@@ -128,10 +133,13 @@ public final class MediaSessionConnector {
  | PlaybackStateCompat.ACTION_REWIND
  | PlaybackStateCompat.ACTION_STOP
  | PlaybackStateCompat.ACTION_SET_REPEAT_MODE
- | PlaybackStateCompat.ACTION_SET_SHUFFLE_MODE;
+ | PlaybackStateCompat.ACTION_SET_SHUFFLE_MODE
+ | ACTION_SET_PLAYBACK_SPEED;
 
  /** The default playback actions. */
- @PlaybackActions public static final long DEFAULT_PLAYBACK_ACTIONS = ALL_PLAYBACK_ACTIONS;
+ @PlaybackActions
+ public static final long DEFAULT_PLAYBACK_ACTIONS =
+ ALL_PLAYBACK_ACTIONS - ACTION_SET_PLAYBACK_SPEED;
 
  /**
  * The name of the {@link PlaybackStateCompat} float extra with the value of {@code
@@ -145,7 +153,8 @@ public final class MediaSessionConnector {
  | PlaybackStateCompat.ACTION_PAUSE
  | PlaybackStateCompat.ACTION_STOP
  | PlaybackStateCompat.ACTION_SET_SHUFFLE_MODE
- | PlaybackStateCompat.ACTION_SET_REPEAT_MODE;
+ | PlaybackStateCompat.ACTION_SET_REPEAT_MODE
+ | ACTION_SET_PLAYBACK_SPEED;
  private static final int BASE_MEDIA_SESSION_FLAGS =
  MediaSessionCompat.FLAG_HANDLES_MEDIA_BUTTONS
  | MediaSessionCompat.FLAG_HANDLES_TRANSPORT_CONTROLS;
@@ -1230,6 +1239,14 @@ public void onSetRepeatMode(@PlaybackStateCompat.RepeatMode int mediaSessionRepe
  }
  }
 
+ @Override
+ public void onSetPlaybackSpeed(float speed) {
+ if (canDispatchPlaybackAction(ACTION_SET_PLAYBACK_SPEED) && speed > 0) {
+ controlDispatcher.dispatchSetPlaybackParameters(
+ player, player.getPlaybackParameters().withSpeed(speed));
+ }
+ }
+
  @Override
  public void onSkipToNext() {
  if (canDispatchToQueueNavigator(PlaybackStateCompat.ACTION_SKIP_TO_NEXT)) {

library/core/src/main/java/com/google/android/exoplayer2/ControlDispatcher.java

@@ -113,6 +113,15 @@ public interface ControlDispatcher {
  */
  boolean dispatchStop(Player player, boolean reset);
 
+ /**
+ * Dispatches a {@link Player#setPlaybackParameters(PlaybackParameters)} operation.
+ *
+ * @param player The {@link Player} to which the operation should be dispatched.
+ * @param playbackParameters The playback parameters.
+ * @return True if the operation was dispatched. False if suppressed.
+ */
+ boolean dispatchSetPlaybackParameters(Player player, PlaybackParameters playbackParameters);
+
  /** Returns {@code true} if rewind is enabled, {@code false} otherwise. */
  boolean isRewindEnabled();
 

library/core/src/main/java/com/google/android/exoplayer2/DefaultControlDispatcher.java

@@ -139,6 +139,13 @@ public boolean dispatchStop(Player player, boolean reset) {
  return true;
  }
 
+ @Override
+ public boolean dispatchSetPlaybackParameters(
+ Player player, PlaybackParameters playbackParameters) {
+ player.setPlaybackParameters(playbackParameters);
+ return true;
+ }
+
  @Override
  public boolean isRewindEnabled() {
  return rewindIncrementMs > 0;