Broadcast audio session id to allow application of external audio effects

#163

Author: moneytoo

app/build.gradle

@@ -10,8 +10,8 @@ android {
         applicationId "com.brouken.player"
         minSdkVersion 21
         targetSdkVersion 30
-        versionCode 52
-        versionName "0.52"
+        versionCode 53
+        versionName "0.53"
         archivesBaseName = "Just.Player.v${versionName}"
     }
 

app/src/main/java/com/brouken/player/PlayerActivity.java

@@ -24,6 +24,7 @@
 import android.graphics.Typeface;
 import android.graphics.drawable.Icon;
 import android.media.AudioManager;
+import android.media.audiofx.AudioEffect;
 import android.media.audiofx.LoudnessEnhancer;
 import android.net.Uri;
 import android.os.Build;
@@ -926,13 +927,13 @@ public void onAnimationEnd(Animator animation) {
                 loudnessEnhancer.release();
             }
             try {
-                int audioSessionId = C.generateAudioSessionIdV21(this);
-                loudnessEnhancer = new LoudnessEnhancer(audioSessionId);
-                player.setAudioSessionId(audioSessionId);
+                loudnessEnhancer = new LoudnessEnhancer(player.getAudioSessionId());
             } catch (RuntimeException e) {
                 e.printStackTrace();
             }
 
+            notifyAudioSessionUpdate(true);
+
             videoLoading = true;
 
             updateLoading(true);
@@ -974,6 +975,8 @@ public void onAnimationEnd(Animator animation) {
 
     public void releasePlayer() {
         if (player != null) {
+            notifyAudioSessionUpdate(false);
+
             mediaSession.setActive(false);
             mediaSession.release();
 
@@ -1013,6 +1016,7 @@ public void onAudioSessionIdChanged(int audioSessionId) {
             } catch (RuntimeException e) {
                 e.printStackTrace();
             }
+            notifyAudioSessionUpdate(true);
         }
 
         @Override
@@ -1742,4 +1746,15 @@ void skipToNext() {
             initializePlayer();
         }
     }
+
+    void notifyAudioSessionUpdate(final boolean active) {
+        final Intent intent = new Intent(active ? AudioEffect.ACTION_OPEN_AUDIO_EFFECT_CONTROL_SESSION
+                : AudioEffect.ACTION_CLOSE_AUDIO_EFFECT_CONTROL_SESSION);
+        intent.putExtra(AudioEffect.EXTRA_AUDIO_SESSION, player.getAudioSessionId());
+        intent.putExtra(AudioEffect.EXTRA_PACKAGE_NAME, getPackageName());
+        if (active) {
+            intent.putExtra(AudioEffect.EXTRA_CONTENT_TYPE, AudioEffect.CONTENT_TYPE_MOVIE);
+        }
+        sendBroadcast(intent);
+    }
 }