add getter/setter of skipSilenceEnable to AudioComponent

PiperOrigin-RevId: 298070828

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

@@ -141,6 +141,16 @@ public interface Player {
 
     /** Returns the audio volume, with 0 being silence and 1 being unity gain. */
     float getVolume();
+
+    /**
+     * Sets whether skipping silences in the audio stream is enabled.
+     *
+     * @param skipSilenceEnabled Whether skipping silences in the audio stream is enabled.
+     */
+    void setSkipSilenceEnabled(boolean skipSilenceEnabled);
+
+    /** Returns whether skipping silences in the audio stream is enabled. */
+    boolean getSkipSilenceEnabled();
   }
 
   /** The video component of a {@link Player}. */

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

@@ -125,6 +125,12 @@ public interface Renderer extends PlayerMessage.Target {
    */
   @SuppressWarnings("deprecation")
   int MSG_SET_VIDEO_DECODER_OUTPUT_BUFFER_RENDERER = C.MSG_SET_VIDEO_DECODER_OUTPUT_BUFFER_RENDERER;
+  /**
+   * The type of a message that can be passed to an audio renderer via {@link
+   * ExoPlayer#createMessage(Target)}. The message payload should be a {@link Boolean} instance
+   * telling whether to enable or disable skipping silences in the audio stream.
+   */
+  int MSG_SET_SKIP_SILENCE_ENABLED = 101;
   /**
    * Applications or extensions may define custom {@code MSG_*} constants that can be passed to
    * renderers. These custom constants must be greater than or equal to this value.

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

@@ -715,6 +715,30 @@ public class SimpleExoPlayer extends BasePlayer
     return audioVolume;
   }
 
+  @Override
+  public boolean getSkipSilenceEnabled() {
+    return skipSilenceEnabled;
+  }
+
+  @Override
+  public void setSkipSilenceEnabled(boolean skipSilenceEnabled) {
+    verifyApplicationThread();
+    if (this.skipSilenceEnabled == skipSilenceEnabled) {
+      return;
+    }
+    this.skipSilenceEnabled = skipSilenceEnabled;
+    for (Renderer renderer : renderers) {
+      if (renderer.getTrackType() == C.TRACK_TYPE_AUDIO) {
+        player
+            .createMessage(renderer)
+            .setType(Renderer.MSG_SET_SKIP_SILENCE_ENABLED)
+            .setPayload(skipSilenceEnabled)
+            .send();
+      }
+    }
+    notifySkipSilenceEnabledChanged();
+  }
+
   /**
    * Sets the stream type for audio playback, used by the underlying audio track.
    *
@@ -1355,7 +1379,14 @@ public class SimpleExoPlayer extends BasePlayer
   @Override
   public void setPlaybackParameters(@Nullable PlaybackParameters playbackParameters) {
     verifyApplicationThread();
-    setSkipSilenceEnabled(playbackParameters != null && playbackParameters.skipSilence);
+    boolean newSkipSilenceEnabled =
+        playbackParameters != null
+            ? playbackParameters.skipSilence
+            : PlaybackParameters.DEFAULT.skipSilence;
+    if (skipSilenceEnabled != newSkipSilenceEnabled) {
+      skipSilenceEnabled = newSkipSilenceEnabled;
+      notifySkipSilenceEnabledChanged();
+    }
     player.setPlaybackParameters(playbackParameters);
   }
 
@@ -1708,11 +1739,7 @@ public class SimpleExoPlayer extends BasePlayer
   }
 
   @SuppressWarnings("SuspiciousMethodCalls")
-  private void setSkipSilenceEnabled(boolean skipSilenceEnabled) {
+  private void notifySkipSilenceEnabledChanged() {
-    if (this.skipSilenceEnabled == skipSilenceEnabled) {
-      return;
-    }
-    this.skipSilenceEnabled = skipSilenceEnabled;
     for (AudioListener listener : audioListeners) {
       // Prevent duplicate notification if a listener is both a AudioRendererEventListener and
       // a AudioListener, as they have the same method signature.
@@ -1882,7 +1909,11 @@ public class SimpleExoPlayer extends BasePlayer
 
     @Override
     public void onSkipSilenceEnabledChanged(boolean skipSilenceEnabled) {
-      setSkipSilenceEnabled(skipSilenceEnabled);
+      if (SimpleExoPlayer.this.skipSilenceEnabled == skipSilenceEnabled) {
+        return;
+      }
+      SimpleExoPlayer.this.skipSilenceEnabled = skipSilenceEnabled;
+      notifySkipSilenceEnabledChanged();
     }
 
     // TextOutput implementation

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

@@ -670,6 +670,9 @@ public class MediaCodecAudioRenderer extends MediaCodecRenderer implements Media
         AuxEffectInfo auxEffectInfo = (AuxEffectInfo) message;
         audioSink.setAuxEffectInfo(auxEffectInfo);
         break;
+      case MSG_SET_SKIP_SILENCE_ENABLED:
+        audioSink.setSkipSilenceEnabled((Boolean) message);
+        break;
       default:
         super.handleMessage(messageType, message);
         break;

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

@@ -560,6 +560,9 @@ public abstract class SimpleDecoderAudioRenderer extends BaseRenderer implements
         AuxEffectInfo auxEffectInfo = (AuxEffectInfo) message;
         audioSink.setAuxEffectInfo(auxEffectInfo);
         break;
+      case MSG_SET_SKIP_SILENCE_ENABLED:
+        audioSink.setSkipSilenceEnabled((Boolean) message);
+        break;
       default:
         super.handleMessage(messageType, message);
         break;