diff --git a/media/TEST_MAPPING b/media/TEST_MAPPING
index a9da832..8f5f1f6 100644
--- a/media/TEST_MAPPING
+++ b/media/TEST_MAPPING
@@ -49,6 +49,18 @@
         {"exclude-annotation": "org.junit.Ignore"}
       ]
     }
+  ],
+  "postsubmit": [
+    {
+      "file_patterns": [
+        "[^/]*(LoudnessCodec)[^/]*\\.java"
+      ],
+      "name": "LoudnessCodecApiTest",
+      "options": [
+        {
+          "include-annotation": "android.platform.test.annotations.Presubmit"
+        }
+      ]
+    }
   ]
 }
-
diff --git a/media/java/android/media/AudioManager.java b/media/java/android/media/AudioManager.java
index 9f63dfd..9ae6f8d 100644
--- a/media/java/android/media/AudioManager.java
+++ b/media/java/android/media/AudioManager.java
@@ -19,8 +19,6 @@
 import static android.companion.virtual.VirtualDeviceParams.DEVICE_POLICY_DEFAULT;
 import static android.companion.virtual.VirtualDeviceParams.POLICY_TYPE_AUDIO;
 import static android.content.Context.DEVICE_ID_DEFAULT;
-import static android.media.audio.Flags.autoPublicVolumeApiHardening;
-import static android.media.audio.Flags.FLAG_LOUDNESS_CONFIGURATOR_API;
 import static android.media.audio.Flags.FLAG_FOCUS_FREEZE_TEST_API;
 
 import android.Manifest;
@@ -2924,33 +2922,6 @@
     }
 
     //====================================================================
-    // Loudness management
-    private final Object mLoudnessCodecLock = new Object();
-
-    @GuardedBy("mLoudnessCodecLock")
-    private LoudnessCodecDispatcher mLoudnessCodecDispatcher = null;
-
-    /**
-     * Creates a new instance of {@link LoudnessCodecConfigurator}.
-     * @return the {@link LoudnessCodecConfigurator} instance
-     *
-     * TODO: remove hide once API is final
-     * @hide
-     */
-    @FlaggedApi(FLAG_LOUDNESS_CONFIGURATOR_API)
-    public @NonNull LoudnessCodecConfigurator createLoudnessCodecConfigurator() {
-        LoudnessCodecConfigurator configurator;
-        synchronized (mLoudnessCodecLock) {
-            // initialize lazily
-            if (mLoudnessCodecDispatcher == null) {
-                mLoudnessCodecDispatcher = new LoudnessCodecDispatcher(this);
-            }
-            configurator = mLoudnessCodecDispatcher.createLoudnessCodecConfigurator();
-        }
-        return configurator;
-    }
-
-    //====================================================================
     // Bluetooth SCO control
     /**
      * Sticky broadcast intent action indicating that the Bluetooth SCO audio
diff --git a/media/java/android/media/AudioSystem.java b/media/java/android/media/AudioSystem.java
index 61b5fd5..367b38a 100644
--- a/media/java/android/media/AudioSystem.java
+++ b/media/java/android/media/AudioSystem.java
@@ -2462,6 +2462,8 @@
     public static final int PLATFORM_VOICE = 1;
     /** @hide The platform is a television or a set-top box */
     public static final int PLATFORM_TELEVISION = 2;
+    /** @hide The platform is automotive */
+    public static final int PLATFORM_AUTOMOTIVE = 3;
 
     /**
      * @hide
@@ -2478,6 +2480,9 @@
             return PLATFORM_VOICE;
         } else if (context.getPackageManager().hasSystemFeature(PackageManager.FEATURE_LEANBACK)) {
             return PLATFORM_TELEVISION;
+        } else if (context.getPackageManager().hasSystemFeature(
+                PackageManager.FEATURE_AUTOMOTIVE)) {
+            return PLATFORM_AUTOMOTIVE;
         } else {
             return PLATFORM_DEFAULT;
         }
diff --git a/media/java/android/media/IAudioService.aidl b/media/java/android/media/IAudioService.aidl
index b4ca485..42400d1 100644
--- a/media/java/android/media/IAudioService.aidl
+++ b/media/java/android/media/IAudioService.aidl
@@ -52,7 +52,7 @@
 import android.media.ISpatializerOutputCallback;
 import android.media.IStreamAliasingDispatcher;
 import android.media.IVolumeController;
-import android.media.LoudnessCodecFormat;
+import android.media.LoudnessCodecInfo;
 import android.media.PlayerBase;
 import android.media.VolumeInfo;
 import android.media.VolumePolicy;
@@ -731,15 +731,13 @@
 
     void unregisterLoudnessCodecUpdatesDispatcher(in ILoudnessCodecUpdatesDispatcher dispatcher);
 
-    oneway void startLoudnessCodecUpdates(in int piid);
+    oneway void startLoudnessCodecUpdates(int piid, in List<LoudnessCodecInfo> codecInfoSet);
 
-    oneway void stopLoudnessCodecUpdates(in int piid);
+    oneway void stopLoudnessCodecUpdates(int piid);
 
-    oneway void addLoudnesssCodecFormat(in int piid, in LoudnessCodecFormat format);
+    oneway void addLoudnessCodecInfo(int piid, in LoudnessCodecInfo codecInfo);
 
-    oneway void addLoudnesssCodecFormatList(in int piid, in List<LoudnessCodecFormat> format);
+    oneway void removeLoudnessCodecInfo(int piid, in LoudnessCodecInfo codecInfo);
 
-    oneway void removeLoudnessCodecFormat(in int piid, in LoudnessCodecFormat format);
-
-    PersistableBundle getLoudnessParams(in int piid, in LoudnessCodecFormat format);
+    PersistableBundle getLoudnessParams(int piid, in LoudnessCodecInfo codecInfo);
 }
diff --git a/media/java/android/media/LoudnessCodecConfigurator.java b/media/java/android/media/LoudnessCodecConfigurator.java
index 409abc2..92f3372 100644
--- a/media/java/android/media/LoudnessCodecConfigurator.java
+++ b/media/java/android/media/LoudnessCodecConfigurator.java
@@ -16,6 +16,9 @@
 
 package android.media;
 
+import static android.media.AudioPlaybackConfiguration.PLAYER_PIID_INVALID;
+import static android.media.LoudnessCodecInfo.CodecMetadataType.CODEC_METADATA_TYPE_MPEG_4;
+import static android.media.LoudnessCodecInfo.CodecMetadataType.CODEC_METADATA_TYPE_MPEG_D;
 import static android.media.audio.Flags.FLAG_LOUDNESS_CONFIGURATOR_API;
 
 import android.annotation.CallbackExecutor;
@@ -23,21 +26,27 @@
 import android.os.Bundle;
 import android.util.Log;
 
+import androidx.annotation.GuardedBy;
 import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
 
-import java.util.ArrayList;
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.HashSet;
 import java.util.List;
 import java.util.Objects;
+import java.util.Set;
 import java.util.concurrent.Executor;
 import java.util.concurrent.Executors;
+import java.util.concurrent.atomic.AtomicBoolean;
 
 /**
  * Class for getting recommended loudness parameter updates for audio decoders, according to the
  * encoded format and current audio routing. Those updates can be automatically applied to the
  * {@link MediaCodec} instance(s), or be provided to the user. The codec loudness management
- * updates are defined by the CTA-2075 standard.
+ * parameter updates are defined by the CTA-2075 standard.
  * <p>A new object should be instantiated for each {@link AudioTrack} with the help
- * of {@link AudioManager#createLoudnessCodecConfigurator()}.
+ * of {@link #create()} or {@link #create(Executor, OnLoudnessCodecUpdateListener)}.
  *
  * TODO: remove hide once API is final
  * @hide
@@ -81,120 +90,255 @@
 
     @NonNull private final LoudnessCodecDispatcher mLcDispatcher;
 
+    private final Object mConfiguratorLock = new Object();
+
+    @GuardedBy("mConfiguratorLock")
     private AudioTrack mAudioTrack;
 
-    private final List<MediaCodec> mMediaCodecs = new ArrayList<>();
+    @GuardedBy("mConfiguratorLock")
+    private final Executor mExecutor;
 
-    /** @hide */
-    protected LoudnessCodecConfigurator(@NonNull LoudnessCodecDispatcher lcDispatcher) {
-        mLcDispatcher = Objects.requireNonNull(lcDispatcher);
-    }
+    @GuardedBy("mConfiguratorLock")
+    private final OnLoudnessCodecUpdateListener mListener;
 
+    @GuardedBy("mConfiguratorLock")
+    private final HashMap<LoudnessCodecInfo, Set<MediaCodec>> mMediaCodecs = new HashMap<>();
 
     /**
-     * Starts receiving asynchronous loudness updates and registers the listener for
-     * receiving {@link MediaCodec} loudness parameter updates.
-     * <p>This method should be called before {@link #startLoudnessCodecUpdates()} or
-     * after {@link #stopLoudnessCodecUpdates()}.
+     * Creates a new instance of {@link LoudnessCodecConfigurator}
+     *
+     * <p>This method should be used when the client does not need to alter the
+     * codec loudness parameters before they are applied to the audio decoders.
+     * Otherwise, use {@link #create(Executor, OnLoudnessCodecUpdateListener)}.
+     *
+     * @return the {@link LoudnessCodecConfigurator} instance
+     *
+     * TODO: remove hide once API is final
+     * @hide
+     */
+    @FlaggedApi(FLAG_LOUDNESS_CONFIGURATOR_API)
+    public static @NonNull LoudnessCodecConfigurator create() {
+        return new LoudnessCodecConfigurator(new LoudnessCodecDispatcher(AudioManager.getService()),
+                Executors.newSingleThreadExecutor(), new OnLoudnessCodecUpdateListener() {});
+    }
+
+    /**
+     * Creates a new instance of {@link LoudnessCodecConfigurator}
+     *
+     * <p>This method should be used when the client wants to alter the codec
+     * loudness parameters before they are applied to the audio decoders.
+     * Otherwise, use {@link #create()}.
      *
      * @param executor {@link Executor} to handle the callbacks
-     * @param listener used to receive updates
+     * @param listener used for receiving updates
      *
-     * @return {@code true} if there is at least one {@link MediaCodec} and
-     * {@link AudioTrack} set and the user can expect receiving updates.
+     * @return the {@link LoudnessCodecConfigurator} instance
      *
      * TODO: remove hide once API is final
      * @hide
      */
     @FlaggedApi(FLAG_LOUDNESS_CONFIGURATOR_API)
-    public boolean startLoudnessCodecUpdates(@NonNull @CallbackExecutor Executor executor,
-                                             @NonNull OnLoudnessCodecUpdateListener listener) {
-        Objects.requireNonNull(executor,
-                "Executor must not be null");
-        Objects.requireNonNull(listener,
-                "OnLoudnessCodecUpdateListener must not be null");
-        mLcDispatcher.addLoudnessCodecListener(this, executor, listener);
+    public static @NonNull LoudnessCodecConfigurator create(
+            @NonNull @CallbackExecutor Executor executor,
+            @NonNull OnLoudnessCodecUpdateListener listener) {
+        Objects.requireNonNull(executor, "Executor cannot be null");
+        Objects.requireNonNull(listener, "OnLoudnessCodecUpdateListener cannot be null");
 
-        return checkStartLoudnessConfigurator();
+        return new LoudnessCodecConfigurator(new LoudnessCodecDispatcher(AudioManager.getService()),
+                executor, listener);
     }
 
     /**
-     * Starts receiving asynchronous loudness updates.
-     * <p>The registered MediaCodecs will be updated automatically without any client
-     * callbacks.
+     * Creates a new instance of {@link LoudnessCodecConfigurator}
      *
-     * @return {@code true} if there is at least one MediaCodec and AudioTrack set
-     * (see {@link #setAudioTrack(AudioTrack)}, {@link #addMediaCodec(MediaCodec)})
-     * and the user can expect receiving updates.
+     * <p>This method should be used only in testing
      *
-     * TODO: remove hide once API is final
+     * @param service interface for communicating with AudioService
+     * @param executor {@link Executor} to handle the callbacks
+     * @param listener used for receiving updates
+     *
+     * @return the {@link LoudnessCodecConfigurator} instance
+     *
      * @hide
      */
-    @FlaggedApi(FLAG_LOUDNESS_CONFIGURATOR_API)
-    public boolean startLoudnessCodecUpdates() {
-        mLcDispatcher.addLoudnessCodecListener(this,
-                Executors.newSingleThreadExecutor(), new OnLoudnessCodecUpdateListener() {});
-        return checkStartLoudnessConfigurator();
+    public static @NonNull LoudnessCodecConfigurator createForTesting(
+            @NonNull IAudioService service,
+            @NonNull @CallbackExecutor Executor executor,
+            @NonNull OnLoudnessCodecUpdateListener listener) {
+        Objects.requireNonNull(service, "IAudioService cannot be null");
+        Objects.requireNonNull(executor, "Executor cannot be null");
+        Objects.requireNonNull(listener, "OnLoudnessCodecUpdateListener cannot be null");
+
+        return new LoudnessCodecConfigurator(new LoudnessCodecDispatcher(service),
+                executor, listener);
+    }
+
+    /** @hide */
+    private LoudnessCodecConfigurator(@NonNull LoudnessCodecDispatcher lcDispatcher,
+            @NonNull @CallbackExecutor Executor executor,
+            @NonNull OnLoudnessCodecUpdateListener listener) {
+        mLcDispatcher = Objects.requireNonNull(lcDispatcher, "Dispatcher cannot be null");
+        mExecutor = Objects.requireNonNull(executor, "Executor cannot be null");
+        mListener = Objects.requireNonNull(listener,
+                "OnLoudnessCodecUpdateListener cannot be null");
     }
 
     /**
-     * Stops receiving asynchronous loudness updates.
+     * Sets the {@link AudioTrack} and starts receiving asynchronous updates for
+     * the registered {@link MediaCodec}s (see {@link #addMediaCodec(MediaCodec)})
+     *
+     * <p>The AudioTrack should be the one that receives audio data from the
+     * added audio decoders and is used to determine the device routing on which
+     * the audio streaming will take place. This will directly influence the
+     * loudness parameters.
+     * <p>After calling this method the framework will compute the initial set of
+     * parameters which will be applied to the registered codecs/returned to the
+     * listener for modification.
+     *
+     * @param audioTrack the track that will receive audio data from the provided
+     *                   audio decoders. In case this is {@code null} this
+     *                   method will have the effect of clearing the existing set
+     *                   {@link AudioTrack} and will stop receiving asynchronous
+     *                   loudness updates
      *
      * TODO: remove hide once API is final
      * @hide
      */
     @FlaggedApi(FLAG_LOUDNESS_CONFIGURATOR_API)
-    public void stopLoudnessCodecUpdates() {
-        mLcDispatcher.removeLoudnessCodecListener(this);
+    public void setAudioTrack(AudioTrack audioTrack) {
+        List<LoudnessCodecInfo> codecInfos;
+        int piid = PLAYER_PIID_INVALID;
+        int oldPiid = PLAYER_PIID_INVALID;
+        synchronized (mConfiguratorLock) {
+            if (mAudioTrack != null && mAudioTrack == audioTrack) {
+                Log.v(TAG, "Loudness configurator already started for piid: "
+                        + mAudioTrack.getPlayerIId());
+                return;
+            }
+
+            codecInfos = getLoudnessCodecInfoList_l();
+            if (mAudioTrack != null) {
+                oldPiid = mAudioTrack.getPlayerIId();
+                mLcDispatcher.removeLoudnessCodecListener(this);
+            }
+            if (audioTrack != null) {
+                piid = audioTrack.getPlayerIId();
+                mLcDispatcher.addLoudnessCodecListener(this, mExecutor, mListener);
+            }
+
+            mAudioTrack = audioTrack;
+        }
+
+        if (oldPiid != PLAYER_PIID_INVALID) {
+            Log.v(TAG, "Loudness configurator stopping updates for piid: " + oldPiid);
+            mLcDispatcher.stopLoudnessCodecUpdates(oldPiid);
+        }
+        if (piid != PLAYER_PIID_INVALID) {
+            Log.v(TAG, "Loudness configurator starting updates for piid: " + piid);
+            mLcDispatcher.startLoudnessCodecUpdates(piid, codecInfos);
+        }
     }
 
     /**
      * Adds a new {@link MediaCodec} that will stream data to an {@link AudioTrack}
-     * which is registered through {@link #setAudioTrack(AudioTrack)}.
+     * which the client sets
+     * (see {@link LoudnessCodecConfigurator#setAudioTrack(AudioTrack)}).
+     *
+     * <p>This method can be called while asynchronous updates are live.
+     *
+     * <p>No new element will be added if the passed {@code mediaCodec} was
+     * previously added.
+     *
+     * @param mediaCodec the codec to start receiving asynchronous loudness
+     *                   updates
      *
      * TODO: remove hide once API is final
      * @hide
      */
     @FlaggedApi(FLAG_LOUDNESS_CONFIGURATOR_API)
     public void addMediaCodec(@NonNull MediaCodec mediaCodec) {
-        mMediaCodecs.add(Objects.requireNonNull(mediaCodec,
-                "MediaCodec for addMediaCodec must not be null"));
+        final MediaCodec mc = Objects.requireNonNull(mediaCodec,
+                "MediaCodec for addMediaCodec cannot be null");
+        int piid = PLAYER_PIID_INVALID;
+        final LoudnessCodecInfo mcInfo = getCodecInfo(mc);
+
+        if (mcInfo != null) {
+            synchronized (mConfiguratorLock) {
+                final AtomicBoolean containsCodec = new AtomicBoolean(false);
+                Set<MediaCodec> newSet = mMediaCodecs.computeIfPresent(mcInfo, (info, codecSet) -> {
+                    containsCodec.set(!codecSet.add(mc));
+                    return codecSet;
+                });
+                if (newSet == null) {
+                    newSet = new HashSet<>();
+                    newSet.add(mc);
+                    mMediaCodecs.put(mcInfo, newSet);
+                }
+                if (containsCodec.get()) {
+                    Log.v(TAG, "Loudness configurator already added media codec " + mediaCodec);
+                    return;
+                }
+                if (mAudioTrack != null) {
+                    piid = mAudioTrack.getPlayerIId();
+                }
+            }
+
+            if (piid != PLAYER_PIID_INVALID) {
+                mLcDispatcher.addLoudnessCodecInfo(piid, mcInfo);
+            }
+        }
     }
 
     /**
      * Removes the {@link MediaCodec} from receiving loudness updates.
      *
+     * <p>This method can be called while asynchronous updates are live.
+     *
+     * <p>No elements will be removed if the passed mediaCodec was not added before.
+     *
+     * @param mediaCodec the element to remove for receiving asynchronous updates
+     *
      * TODO: remove hide once API is final
      * @hide
      */
     @FlaggedApi(FLAG_LOUDNESS_CONFIGURATOR_API)
     public void removeMediaCodec(@NonNull MediaCodec mediaCodec) {
-        mMediaCodecs.remove(Objects.requireNonNull(mediaCodec,
-                "MediaCodec for removeMediaCodec must not be null"));
+        int piid = PLAYER_PIID_INVALID;
+        LoudnessCodecInfo mcInfo;
+        AtomicBoolean removed = new AtomicBoolean(false);
+
+        mcInfo = getCodecInfo(Objects.requireNonNull(mediaCodec,
+                "MediaCodec for removeMediaCodec cannot be null"));
+
+        if (mcInfo != null) {
+            synchronized (mConfiguratorLock) {
+                if (mAudioTrack != null) {
+                    piid = mAudioTrack.getPlayerIId();
+                }
+                mMediaCodecs.computeIfPresent(mcInfo, (format, mcs) -> {
+                    removed.set(mcs.remove(mediaCodec));
+                    if (mcs.isEmpty()) {
+                        // remove the entry
+                        return null;
+                    }
+                    return mcs;
+                });
+            }
+
+            if (piid != PLAYER_PIID_INVALID && removed.get()) {
+                mLcDispatcher.removeLoudnessCodecInfo(piid, mcInfo);
+            }
+        }
     }
 
     /**
-     * Sets the {@link AudioTrack} that can receive audio data from the added
-     * {@link MediaCodec}'s. The {@link AudioTrack} is used to determine the devices
-     * on which the streaming will take place and hence will directly influence the
-     * loudness params.
-     * <p>Should be called before starting the loudness updates
-     * (see {@link #startLoudnessCodecUpdates()},
-     * {@link #startLoudnessCodecUpdates(Executor, OnLoudnessCodecUpdateListener)})
+     * Gets synchronous loudness updates when no listener is required. The provided
+     * {@link MediaCodec} streams audio data to the passed {@link AudioTrack}.
      *
-     * TODO: remove hide once API is final
-     * @hide
-     */
-    @FlaggedApi(FLAG_LOUDNESS_CONFIGURATOR_API)
-    public void setAudioTrack(@NonNull AudioTrack audioTrack) {
-        mAudioTrack = Objects.requireNonNull(audioTrack,
-                "AudioTrack for setAudioTrack must not be null");
-    }
-
-    /**
-     * Gets synchronous loudness updates when no listener is required and at least one
-     * {@link MediaCodec} which streams to a registered {@link AudioTrack} is set.
-     * Otherwise, an empty {@link Bundle} will be returned.
+     * @param audioTrack track that receives audio data from the passed
+     *                   {@link MediaCodec}
+     * @param mediaCodec codec that decodes loudness annotated data for the passed
+     *                   {@link AudioTrack}
      *
      * @return the {@link Bundle} containing the current loudness parameters. Caller is
      * responsible to update the {@link MediaCodec}
@@ -204,22 +348,89 @@
      */
     @FlaggedApi(FLAG_LOUDNESS_CONFIGURATOR_API)
     @NonNull
-    public Bundle getLoudnessCodecParams(@NonNull MediaCodec mediaCodec) {
-        // TODO: implement synchronous loudness params updates
-        return new Bundle();
+    public Bundle getLoudnessCodecParams(@NonNull AudioTrack audioTrack,
+            @NonNull MediaCodec mediaCodec) {
+        Objects.requireNonNull(audioTrack, "Passed audio track cannot be null");
+
+        LoudnessCodecInfo codecInfo = getCodecInfo(mediaCodec);
+        if (codecInfo == null) {
+            return new Bundle();
+        }
+
+        return mLcDispatcher.getLoudnessCodecParams(audioTrack.getPlayerIId(), codecInfo);
     }
 
-    private boolean checkStartLoudnessConfigurator() {
-        if (mAudioTrack == null) {
-            Log.w(TAG, "Cannot start loudness configurator without an AudioTrack");
-            return false;
+    /** @hide */
+    /*package*/ int getAssignedTrackPiid() {
+        int piid = PLAYER_PIID_INVALID;
+
+        synchronized (mConfiguratorLock) {
+            if (mAudioTrack == null) {
+                return piid;
+            }
+            piid = mAudioTrack.getPlayerIId();
         }
 
-        if (mMediaCodecs.isEmpty()) {
-            Log.w(TAG, "Cannot start loudness configurator without at least one MediaCodec");
-            return false;
+        return piid;
+    }
+
+    /** @hide */
+    /*package*/ List<MediaCodec> getRegisteredMediaCodecList() {
+        synchronized (mConfiguratorLock) {
+            return mMediaCodecs.values().stream().flatMap(Collection::stream).toList();
+        }
+    }
+
+    @GuardedBy("mConfiguratorLock")
+    private List<LoudnessCodecInfo> getLoudnessCodecInfoList_l() {
+        return mMediaCodecs.values().stream().flatMap(listMc -> listMc.stream().map(
+                LoudnessCodecConfigurator::getCodecInfo)).toList();
+    }
+
+    @Nullable
+    private static LoudnessCodecInfo getCodecInfo(@NonNull MediaCodec mediaCodec) {
+        LoudnessCodecInfo lci = new LoudnessCodecInfo();
+        final MediaCodecInfo codecInfo = mediaCodec.getCodecInfo();
+        if (codecInfo.isEncoder()) {
+            // loudness info only for decoders
+            Log.w(TAG, "MediaCodec used for encoding does not support loudness annotation");
+            return null;
         }
 
-        return true;
+        final MediaFormat inputFormat = mediaCodec.getInputFormat();
+        final String mimeType = inputFormat.getString(MediaFormat.KEY_MIME);
+        if (MediaFormat.MIMETYPE_AUDIO_AAC.equalsIgnoreCase(mimeType)) {
+            // check both KEY_AAC_PROFILE and KEY_PROFILE as some codecs may only recognize one of
+            // these two keys
+            int aacProfile = -1;
+            int profile = -1;
+            try {
+                aacProfile = inputFormat.getInteger(MediaFormat.KEY_AAC_PROFILE);
+            } catch (NullPointerException e) {
+                // does not contain KEY_AAC_PROFILE. do nothing
+            }
+            try {
+                profile = inputFormat.getInteger(MediaFormat.KEY_PROFILE);
+            } catch (NullPointerException e) {
+                // does not contain KEY_PROFILE. do nothing
+            }
+            if (aacProfile == MediaCodecInfo.CodecProfileLevel.AACObjectXHE
+                    || profile == MediaCodecInfo.CodecProfileLevel.AACObjectXHE) {
+                lci.metadataType = CODEC_METADATA_TYPE_MPEG_D;
+            } else {
+                lci.metadataType = CODEC_METADATA_TYPE_MPEG_4;
+            }
+        } else {
+            Log.w(TAG, "MediaCodec mime type not supported for loudness annotation");
+            return null;
+        }
+
+        final MediaFormat outputFormat = mediaCodec.getOutputFormat();
+        lci.isDownmixing = outputFormat.getInteger(MediaFormat.KEY_CHANNEL_COUNT)
+                < inputFormat.getInteger(MediaFormat.KEY_CHANNEL_COUNT);
+
+        lci.mediaCodecHashCode = mediaCodec.hashCode();
+
+        return lci;
     }
 }
diff --git a/media/java/android/media/LoudnessCodecDispatcher.java b/media/java/android/media/LoudnessCodecDispatcher.java
index fc5c354..be881b1 100644
--- a/media/java/android/media/LoudnessCodecDispatcher.java
+++ b/media/java/android/media/LoudnessCodecDispatcher.java
@@ -16,94 +16,217 @@
 
 package android.media;
 
+import static android.media.MediaFormat.KEY_AAC_DRC_EFFECT_TYPE;
+import static android.media.MediaFormat.KEY_AAC_DRC_HEAVY_COMPRESSION;
+import static android.media.MediaFormat.KEY_AAC_DRC_TARGET_REFERENCE_LEVEL;
+
 import android.annotation.CallbackExecutor;
 import android.media.LoudnessCodecConfigurator.OnLoudnessCodecUpdateListener;
+import android.os.Bundle;
 import android.os.PersistableBundle;
 import android.os.RemoteException;
+import android.util.Log;
 
 import androidx.annotation.NonNull;
 
 import java.util.HashMap;
+import java.util.List;
 import java.util.Map.Entry;
 import java.util.Objects;
 import java.util.concurrent.Executor;
 
 /**
  * Class used to handle the loudness related communication with the audio service.
+ *
  * @hide
  */
-public class LoudnessCodecDispatcher {
-    private final class LoudnessCodecUpdatesDispatcherStub
-            extends ILoudnessCodecUpdatesDispatcher.Stub
-            implements CallbackUtil.DispatcherStub {
+public class LoudnessCodecDispatcher implements CallbackUtil.DispatcherStub {
+    private static final String TAG = "LoudnessCodecDispatcher";
+
+    private static final boolean DEBUG = false;
+
+    private static final class LoudnessCodecUpdatesDispatcherStub
+            extends ILoudnessCodecUpdatesDispatcher.Stub {
+        private static LoudnessCodecUpdatesDispatcherStub sLoudnessCodecStub;
+
+        private final CallbackUtil.LazyListenerManager<OnLoudnessCodecUpdateListener>
+                mLoudnessListenerMgr = new CallbackUtil.LazyListenerManager<>();
+
+        private final HashMap<OnLoudnessCodecUpdateListener, LoudnessCodecConfigurator>
+                mConfiguratorListener = new HashMap<>();
+
+        public static synchronized LoudnessCodecUpdatesDispatcherStub getInstance() {
+            if (sLoudnessCodecStub == null) {
+                sLoudnessCodecStub = new LoudnessCodecUpdatesDispatcherStub();
+            }
+            return sLoudnessCodecStub;
+        }
+
+        private LoudnessCodecUpdatesDispatcherStub() {}
+
         @Override
         public void dispatchLoudnessCodecParameterChange(int piid, PersistableBundle params) {
             mLoudnessListenerMgr.callListeners(listener ->
-                    mConfiguratorListener.computeIfPresent(listener, (l, c) -> {
-                        // TODO: send the bundle for the user to update
-                        return c;
+                    mConfiguratorListener.computeIfPresent(listener, (l, lcConfig) -> {
+                        // send the appropriate bundle for the user to update
+                        if (lcConfig.getAssignedTrackPiid() == piid) {
+                            final List<MediaCodec> mediaCodecs =
+                                    lcConfig.getRegisteredMediaCodecList();
+                            for (MediaCodec mediaCodec : mediaCodecs) {
+                                final String infoKey = Integer.toString(mediaCodec.hashCode());
+                                if (params.containsKey(infoKey)) {
+                                    Bundle bundle = new Bundle(
+                                            params.getPersistableBundle(infoKey));
+                                    if (DEBUG) {
+                                        Log.d(TAG,
+                                                "Received for piid " + piid + " bundle: " + bundle);
+                                    }
+                                    bundle =
+                                            LoudnessCodecUpdatesDispatcherStub.filterLoudnessParams(
+                                                    l.onLoudnessCodecUpdate(mediaCodec, bundle));
+                                    if (DEBUG) {
+                                        Log.d(TAG, "User changed for piid " + piid
+                                                + " to filtered bundle: " + bundle);
+                                    }
+
+                                    if (!bundle.isDefinitelyEmpty()) {
+                                        mediaCodec.setParameters(bundle);
+                                    }
+                                }
+                            }
+                        }
+
+                        return lcConfig;
                     }));
         }
 
-        @Override
-        public void register(boolean register) {
-            try {
-                if (register) {
-                    mAm.getService().registerLoudnessCodecUpdatesDispatcher(this);
-                } else {
-                    mAm.getService().unregisterLoudnessCodecUpdatesDispatcher(this);
+        private static Bundle filterLoudnessParams(Bundle bundle) {
+            Bundle filteredBundle = new Bundle();
+
+            if (bundle.containsKey(KEY_AAC_DRC_TARGET_REFERENCE_LEVEL)) {
+                filteredBundle.putInt(KEY_AAC_DRC_TARGET_REFERENCE_LEVEL,
+                        bundle.getInt(KEY_AAC_DRC_TARGET_REFERENCE_LEVEL));
+            }
+            if (bundle.containsKey(KEY_AAC_DRC_HEAVY_COMPRESSION)) {
+                filteredBundle.putInt(KEY_AAC_DRC_HEAVY_COMPRESSION,
+                        bundle.getInt(KEY_AAC_DRC_HEAVY_COMPRESSION));
+            }
+            if (bundle.containsKey(KEY_AAC_DRC_EFFECT_TYPE)) {
+                filteredBundle.putInt(KEY_AAC_DRC_EFFECT_TYPE,
+                        bundle.getInt(KEY_AAC_DRC_EFFECT_TYPE));
+            }
+
+            return filteredBundle;
+        }
+
+        void addLoudnessCodecListener(@NonNull CallbackUtil.DispatcherStub dispatcher,
+                @NonNull LoudnessCodecConfigurator configurator,
+                @NonNull @CallbackExecutor Executor executor,
+                @NonNull OnLoudnessCodecUpdateListener listener) {
+            Objects.requireNonNull(configurator);
+            Objects.requireNonNull(executor);
+            Objects.requireNonNull(listener);
+
+            mLoudnessListenerMgr.addListener(
+                    executor, listener, "addLoudnessCodecListener",
+                    () -> dispatcher);
+            mConfiguratorListener.put(listener, configurator);
+        }
+
+        void removeLoudnessCodecListener(@NonNull LoudnessCodecConfigurator configurator) {
+            Objects.requireNonNull(configurator);
+
+            for (Entry<OnLoudnessCodecUpdateListener, LoudnessCodecConfigurator> e :
+                    mConfiguratorListener.entrySet()) {
+                if (e.getValue() == configurator) {
+                    final OnLoudnessCodecUpdateListener listener = e.getKey();
+                    mConfiguratorListener.remove(listener);
+                    mLoudnessListenerMgr.removeListener(listener, "removeLoudnessCodecListener");
+                    break;
                 }
-            } catch (RemoteException e) {
-                e.rethrowFromSystemServer();
             }
         }
     }
 
-    private final CallbackUtil.LazyListenerManager<OnLoudnessCodecUpdateListener>
-            mLoudnessListenerMgr = new CallbackUtil.LazyListenerManager<>();
-
-    @NonNull private final LoudnessCodecUpdatesDispatcherStub mLoudnessCodecStub;
-
-    private final HashMap<OnLoudnessCodecUpdateListener, LoudnessCodecConfigurator>
-            mConfiguratorListener = new HashMap<>();
-
-    @NonNull private final AudioManager mAm;
-
-    protected LoudnessCodecDispatcher(@NonNull AudioManager am) {
-        mAm = Objects.requireNonNull(am);
-        mLoudnessCodecStub = new LoudnessCodecUpdatesDispatcherStub();
-    }
+    @NonNull private final IAudioService mAudioService;
 
     /** @hide */
-    public LoudnessCodecConfigurator createLoudnessCodecConfigurator() {
-        return new LoudnessCodecConfigurator(this);
+    public LoudnessCodecDispatcher(@NonNull IAudioService audioService) {
+        mAudioService = Objects.requireNonNull(audioService);
+    }
+
+    @Override
+    public void register(boolean register) {
+        try {
+            if (register) {
+                mAudioService.registerLoudnessCodecUpdatesDispatcher(
+                        LoudnessCodecUpdatesDispatcherStub.getInstance());
+            } else {
+                mAudioService.unregisterLoudnessCodecUpdatesDispatcher(
+                        LoudnessCodecUpdatesDispatcherStub.getInstance());
+            }
+        } catch (RemoteException e) {
+            e.rethrowFromSystemServer();
+        }
     }
 
     /** @hide */
     public void addLoudnessCodecListener(@NonNull LoudnessCodecConfigurator configurator,
                                          @NonNull @CallbackExecutor Executor executor,
                                          @NonNull OnLoudnessCodecUpdateListener listener) {
-        Objects.requireNonNull(configurator);
-        Objects.requireNonNull(executor);
-        Objects.requireNonNull(listener);
-
-        mConfiguratorListener.put(listener, configurator);
-        mLoudnessListenerMgr.addListener(
-                executor, listener, "addLoudnessCodecListener", () -> mLoudnessCodecStub);
+        LoudnessCodecUpdatesDispatcherStub.getInstance().addLoudnessCodecListener(this,
+                configurator, executor, listener);
     }
 
     /** @hide */
     public void removeLoudnessCodecListener(@NonNull LoudnessCodecConfigurator configurator) {
-        Objects.requireNonNull(configurator);
+        LoudnessCodecUpdatesDispatcherStub.getInstance().removeLoudnessCodecListener(configurator);
+    }
 
-        for (Entry<OnLoudnessCodecUpdateListener, LoudnessCodecConfigurator> e :
-                mConfiguratorListener.entrySet()) {
-            if (e.getValue() == configurator) {
-                final OnLoudnessCodecUpdateListener listener = e.getKey();
-                mConfiguratorListener.remove(listener);
-                mLoudnessListenerMgr.removeListener(listener, "removeLoudnessCodecListener");
-                break;
-            }
+    /** @hide */
+    public void startLoudnessCodecUpdates(int piid, List<LoudnessCodecInfo> codecInfoList) {
+        try {
+            mAudioService.startLoudnessCodecUpdates(piid, codecInfoList);
+        }  catch (RemoteException e) {
+            e.rethrowFromSystemServer();
         }
     }
+
+    /** @hide */
+    public void stopLoudnessCodecUpdates(int piid) {
+        try {
+            mAudioService.stopLoudnessCodecUpdates(piid);
+        }  catch (RemoteException e) {
+            e.rethrowFromSystemServer();
+        }
+    }
+
+    /** @hide */
+    public void addLoudnessCodecInfo(int piid, @NonNull LoudnessCodecInfo mcInfo) {
+        try {
+            mAudioService.addLoudnessCodecInfo(piid, mcInfo);
+        }  catch (RemoteException e) {
+            e.rethrowFromSystemServer();
+        }
+    }
+
+    /** @hide */
+    public void removeLoudnessCodecInfo(int piid, @NonNull LoudnessCodecInfo mcInfo) {
+        try {
+            mAudioService.removeLoudnessCodecInfo(piid, mcInfo);
+        }  catch (RemoteException e) {
+            e.rethrowFromSystemServer();
+        }
+    }
+
+    /** @hide */
+    public Bundle getLoudnessCodecParams(int piid, @NonNull LoudnessCodecInfo mcInfo) {
+        Bundle loudnessParams = null;
+        try {
+            loudnessParams = new Bundle(mAudioService.getLoudnessParams(piid, mcInfo));
+        }  catch (RemoteException e) {
+            e.rethrowFromSystemServer();
+        }
+        return loudnessParams;
+    }
 }
diff --git a/media/java/android/media/LoudnessCodecFormat.aidl b/media/java/android/media/LoudnessCodecFormat.aidl
deleted file mode 100644
index 75c9060..0000000
--- a/media/java/android/media/LoudnessCodecFormat.aidl
+++ /dev/null
@@ -1,30 +0,0 @@
-/*
- * Copyright (C) 2023 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package android.media;
-
-
-/**
- * Loudness format which specifies the input attributes used for measuring
- * the parameters required to perform loudness alignment as specified by the
- * CTA2075 standard.
- *
- * {@hide}
- */
-parcelable LoudnessCodecFormat {
-    String metadataType;
-    boolean isDownmixing;
-}
\ No newline at end of file
diff --git a/media/java/android/media/LoudnessCodecInfo.aidl b/media/java/android/media/LoudnessCodecInfo.aidl
new file mode 100644
index 0000000..fd69517
--- /dev/null
+++ b/media/java/android/media/LoudnessCodecInfo.aidl
@@ -0,0 +1,43 @@
+/*
+ * Copyright (C) 2023 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.media;
+
+/**
+ * Loudness information for a {@link MediaCodec} object which specifies the
+ * input attributes used for measuring the parameters required to perform
+ * loudness alignment as specified by the CTA2075 standard.
+ *
+ * {@hide}
+ */
+@JavaDerive(equals = true)
+parcelable LoudnessCodecInfo {
+    /** Supported codec metadata types for loudness updates. */
+    @Backing(type="int")
+    enum CodecMetadataType {
+        CODEC_METADATA_TYPE_INVALID = 0,
+        CODEC_METADATA_TYPE_MPEG_4 = 1,
+        CODEC_METADATA_TYPE_MPEG_D = 2,
+        CODEC_METADATA_TYPE_AC_3 = 3,
+        CODEC_METADATA_TYPE_AC_4 = 4,
+        CODEC_METADATA_TYPE_DTS_HD = 5,
+        CODEC_METADATA_TYPE_DTS_UHD = 6
+    }
+
+    int mediaCodecHashCode;
+    CodecMetadataType metadataType;
+    boolean isDownmixing;
+}
\ No newline at end of file
diff --git a/media/tests/LoudnessCodecApiTest/Android.bp b/media/tests/LoudnessCodecApiTest/Android.bp
new file mode 100644
index 0000000..5ca0fc9
--- /dev/null
+++ b/media/tests/LoudnessCodecApiTest/Android.bp
@@ -0,0 +1,27 @@
+package {
+    // See: http://go/android-license-faq
+    // A large-scale-change added 'default_applicable_licenses' to import
+    // all of the 'license_kinds' from "frameworks_base_license"
+    // to get the below license kinds:
+    //   SPDX-license-identifier-Apache-2.0
+    default_applicable_licenses: ["frameworks_base_license"],
+}
+
+android_test {
+    name: "LoudnessCodecApiTest",
+    srcs: ["**/*.java"],
+    static_libs: [
+        "androidx.test.ext.junit",
+        "androidx.test.rules",
+        "junit",
+        "junit-params",
+        "mockito-target-minus-junit4",
+        "flag-junit",
+        "hamcrest-library",
+        "platform-test-annotations",
+    ],
+    platform_apis: true,
+    certificate: "platform",
+    resource_dirs: ["res"],
+    test_suites: ["device-tests"],
+}
diff --git a/media/tests/LoudnessCodecApiTest/AndroidManifest.xml b/media/tests/LoudnessCodecApiTest/AndroidManifest.xml
new file mode 100644
index 0000000..91a671f
--- /dev/null
+++ b/media/tests/LoudnessCodecApiTest/AndroidManifest.xml
@@ -0,0 +1,28 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2020 The Android Open Source Project
+
+     Licensed under the Apache License, Version 2.0 (the "License");
+     you may not use this file except in compliance with the License.
+     You may obtain a copy of the License at
+
+          http://www.apache.org/licenses/LICENSE-2.0
+
+     Unless required by applicable law or agreed to in writing, software
+     distributed under the License is distributed on an "AS IS" BASIS,
+     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+     See the License for the specific language governing permissions and
+     limitations under the License.
+-->
+
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.android.loudnesscodecapitest">
+
+    <application>
+        <uses-library android:name="android.test.runner" />
+    </application>
+
+    <instrumentation android:name="androidx.test.runner.AndroidJUnitRunner"
+            android:targetPackage="com.android.loudnesscodecapitest"
+            android:label="AudioManager loudness codec integration tests InstrumentationRunner">
+    </instrumentation>
+</manifest>
diff --git a/media/tests/LoudnessCodecApiTest/AndroidTest.xml b/media/tests/LoudnessCodecApiTest/AndroidTest.xml
new file mode 100644
index 0000000..0099d98
--- /dev/null
+++ b/media/tests/LoudnessCodecApiTest/AndroidTest.xml
@@ -0,0 +1,27 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2020 The Android Open Source Project
+
+     Licensed under the Apache License, Version 2.0 (the "License");
+     you may not use this file except in compliance with the License.
+     You may obtain a copy of the License at
+
+          http://www.apache.org/licenses/LICENSE-2.0
+
+     Unless required by applicable law or agreed to in writing, software
+     distributed under the License is distributed on an "AS IS" BASIS,
+     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+     See the License for the specific language governing permissions and
+     limitations under the License.
+-->
+<configuration description="Runs Media Framework Tests">
+    <target_preparer class="com.android.tradefed.targetprep.TestAppInstallSetup">
+        <option name="test-file-name" value="LoudnessCodecApiTest.apk" />
+    </target_preparer>
+
+    <option name="test-tag" value="LoudnessCodecApiTest" />
+    <test class="com.android.tradefed.testtype.AndroidJUnitTest" >
+        <option name="package" value="com.android.loudnesscodecapitest" />
+        <option name="runner" value="androidx.test.runner.AndroidJUnitRunner" />
+        <option name="hidden-api-checks" value="false"/>
+    </test>
+</configuration>
diff --git a/media/tests/LoudnessCodecApiTest/res/layout/loudnesscodecapitest.xml b/media/tests/LoudnessCodecApiTest/res/layout/loudnesscodecapitest.xml
new file mode 100644
index 0000000..17fdba6
--- /dev/null
+++ b/media/tests/LoudnessCodecApiTest/res/layout/loudnesscodecapitest.xml
@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2020 The Android Open Source Project
+
+     Licensed under the Apache License, Version 2.0 (the "License");
+     you may not use this file except in compliance with the License.
+     You may obtain a copy of the License at
+
+          http://www.apache.org/licenses/LICENSE-2.0
+
+     Unless required by applicable law or agreed to in writing, software
+     distributed under the License is distributed on an "AS IS" BASIS,
+     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+     See the License for the specific language governing permissions and
+     limitations under the License.
+-->
+
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="fill_parent"
+    android:layout_height="fill_parent"
+    android:orientation="vertical">
+</LinearLayout>
diff --git a/media/tests/LoudnessCodecApiTest/res/raw/noise_2ch_48khz_tlou_19lufs_anchor_17lufs_mp4.m4a b/media/tests/LoudnessCodecApiTest/res/raw/noise_2ch_48khz_tlou_19lufs_anchor_17lufs_mp4.m4a
new file mode 100644
index 0000000..acba4b3
--- /dev/null
+++ b/media/tests/LoudnessCodecApiTest/res/raw/noise_2ch_48khz_tlou_19lufs_anchor_17lufs_mp4.m4a
Binary files differ
diff --git a/media/tests/LoudnessCodecApiTest/res/values/strings.xml b/media/tests/LoudnessCodecApiTest/res/values/strings.xml
new file mode 100644
index 0000000..0c4227c
--- /dev/null
+++ b/media/tests/LoudnessCodecApiTest/res/values/strings.xml
@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <!-- name of the app [CHAR LIMIT=25]-->
+    <string name="app_name">Loudness Codec API Tests</string>
+</resources>
diff --git a/media/tests/LoudnessCodecApiTest/src/com/android/loudnesscodecapitest/LoudnessCodecConfiguratorTest.java b/media/tests/LoudnessCodecApiTest/src/com/android/loudnesscodecapitest/LoudnessCodecConfiguratorTest.java
new file mode 100644
index 0000000..65a9799
--- /dev/null
+++ b/media/tests/LoudnessCodecApiTest/src/com/android/loudnesscodecapitest/LoudnessCodecConfiguratorTest.java
@@ -0,0 +1,273 @@
+/*
+ * Copyright (C) 2023 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.loudnesscodecapitest;
+
+import static android.media.audio.Flags.FLAG_LOUDNESS_CONFIGURATOR_API;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.anyInt;
+import static org.mockito.ArgumentMatchers.anyList;
+import static org.mockito.ArgumentMatchers.eq;
+import static org.mockito.Mockito.times;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+import android.content.res.AssetFileDescriptor;
+import android.media.AudioAttributes;
+import android.media.AudioFormat;
+import android.media.AudioTrack;
+import android.media.IAudioService;
+import android.media.LoudnessCodecConfigurator;
+import android.media.LoudnessCodecConfigurator.OnLoudnessCodecUpdateListener;
+import android.media.MediaCodec;
+import android.media.MediaExtractor;
+import android.media.MediaFormat;
+import android.os.PersistableBundle;
+import android.platform.test.annotations.Presubmit;
+import android.platform.test.annotations.RequiresFlagsEnabled;
+import android.platform.test.flag.junit.CheckFlagsRule;
+import android.platform.test.flag.junit.DeviceFlagsValueProvider;
+import android.util.Log;
+
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+import androidx.test.platform.app.InstrumentationRegistry;
+
+import org.junit.Before;
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.ArgumentCaptor;
+import org.mockito.Mock;
+import org.mockito.junit.MockitoJUnit;
+import org.mockito.junit.MockitoRule;
+
+import java.util.List;
+import java.util.concurrent.Executors;
+
+/**
+ * Unit tests for {@link LoudnessCodecConfigurator} checking the internal interactions with a mocked
+ * {@link IAudioService} without any real IPC interactions.
+ */
+@Presubmit
+@RunWith(AndroidJUnit4.class)
+public class LoudnessCodecConfiguratorTest {
+    private static final String TAG = "LoudnessCodecConfiguratorTest";
+
+    private static final String TEST_MEDIA_AUDIO_CODEC_PREFIX = "audio/";
+    private static final int TEST_AUDIO_TRACK_BUFFER_SIZE = 2048;
+    private static final int TEST_AUDIO_TRACK_SAMPLERATE = 48000;
+    private static final int TEST_AUDIO_TRACK_CHANNELS = 2;
+
+    @Rule
+    public final MockitoRule mockito = MockitoJUnit.rule();
+    @Rule
+    public final CheckFlagsRule mCheckFlagsRule = DeviceFlagsValueProvider.createCheckFlagsRule();
+
+    @Mock
+    private IAudioService mAudioService;
+
+    private LoudnessCodecConfigurator mLcc;
+
+    @Before
+    public void setUp() {
+        mLcc = LoudnessCodecConfigurator.createForTesting(mAudioService,
+                Executors.newSingleThreadExecutor(), new OnLoudnessCodecUpdateListener() {});
+    }
+
+    @Test
+    @RequiresFlagsEnabled(FLAG_LOUDNESS_CONFIGURATOR_API)
+    public void setAudioTrack_callsAudioServiceStart() throws Exception {
+        final AudioTrack track = createAudioTrack();
+
+        mLcc.addMediaCodec(createAndConfigureMediaCodec());
+        mLcc.setAudioTrack(track);
+
+        verify(mAudioService).startLoudnessCodecUpdates(eq(track.getPlayerIId()),
+                anyList());
+    }
+
+    @Test
+    @RequiresFlagsEnabled(FLAG_LOUDNESS_CONFIGURATOR_API)
+    public void getLoudnessCodecParams_callsAudioServiceGetLoudness() throws Exception {
+        when(mAudioService.getLoudnessParams(anyInt(), any())).thenReturn(new PersistableBundle());
+        final AudioTrack track = createAudioTrack();
+
+        mLcc.getLoudnessCodecParams(track, createAndConfigureMediaCodec());
+
+        verify(mAudioService).getLoudnessParams(eq(track.getPlayerIId()), any());
+    }
+
+    @Test
+    @RequiresFlagsEnabled(FLAG_LOUDNESS_CONFIGURATOR_API)
+    public void setAudioTrack_addsAudioServicePiidCodecs() throws Exception {
+        final AudioTrack track = createAudioTrack();
+        final MediaCodec mediaCodec = createAndConfigureMediaCodec();
+
+        mLcc.addMediaCodec(mediaCodec);
+        mLcc.setAudioTrack(track);
+
+        verify(mAudioService).startLoudnessCodecUpdates(eq(track.getPlayerIId()), anyList());
+    }
+
+    @Test
+    @RequiresFlagsEnabled(FLAG_LOUDNESS_CONFIGURATOR_API)
+    public void setAudioTrackTwice_ignoresSecondCall() throws Exception {
+        final AudioTrack track = createAudioTrack();
+        final MediaCodec mediaCodec = createAndConfigureMediaCodec();
+
+        mLcc.addMediaCodec(mediaCodec);
+        mLcc.setAudioTrack(track);
+        mLcc.setAudioTrack(track);
+
+        verify(mAudioService, times(1)).startLoudnessCodecUpdates(eq(track.getPlayerIId()),
+                anyList());
+    }
+
+    @Test
+    @RequiresFlagsEnabled(FLAG_LOUDNESS_CONFIGURATOR_API)
+    public void setTrackNull_stopCodecUpdates() throws Exception {
+        final AudioTrack track = createAudioTrack();
+
+        mLcc.addMediaCodec(createAndConfigureMediaCodec());
+        mLcc.setAudioTrack(track);
+
+        mLcc.setAudioTrack(null);  // stops updates
+        verify(mAudioService).stopLoudnessCodecUpdates(eq(track.getPlayerIId()));
+    }
+
+    @Test
+    @RequiresFlagsEnabled(FLAG_LOUDNESS_CONFIGURATOR_API)
+    public void addMediaCodecTwice_ignoresSecondCall() throws Exception {
+        final ArgumentCaptor<List> argument = ArgumentCaptor.forClass(List.class);
+        final AudioTrack track = createAudioTrack();
+        final MediaCodec mediaCodec = createAndConfigureMediaCodec();
+
+        mLcc.addMediaCodec(mediaCodec);
+        mLcc.addMediaCodec(mediaCodec);
+        mLcc.setAudioTrack(track);
+
+        verify(mAudioService, times(1)).startLoudnessCodecUpdates(
+                eq(track.getPlayerIId()), argument.capture());
+        assertEquals(argument.getValue().size(), 1);
+    }
+
+    @Test
+    @RequiresFlagsEnabled(FLAG_LOUDNESS_CONFIGURATOR_API)
+    public void setClearTrack_removeAllAudioServicePiidCodecs() throws Exception {
+        final ArgumentCaptor<List> argument = ArgumentCaptor.forClass(List.class);
+
+        final AudioTrack track = createAudioTrack();
+
+        mLcc.addMediaCodec(createAndConfigureMediaCodec());
+        mLcc.setAudioTrack(track);
+        verify(mAudioService).startLoudnessCodecUpdates(eq(track.getPlayerIId()),
+                argument.capture());
+        assertEquals(argument.getValue().size(), 1);
+
+        mLcc.addMediaCodec(createAndConfigureMediaCodec());
+        mLcc.setAudioTrack(null);
+        verify(mAudioService).stopLoudnessCodecUpdates(eq(track.getPlayerIId()));
+    }
+
+    @Test
+    @RequiresFlagsEnabled(FLAG_LOUDNESS_CONFIGURATOR_API)
+    public void removeAddedMediaCodecAfterSetTrack_callsAudioServiceRemoveCodec() throws Exception {
+        final AudioTrack track = createAudioTrack();
+        final MediaCodec mediaCodec = createAndConfigureMediaCodec();
+
+        mLcc.addMediaCodec(mediaCodec);
+        mLcc.setAudioTrack(track);
+        mLcc.removeMediaCodec(mediaCodec);
+
+        verify(mAudioService).removeLoudnessCodecInfo(eq(track.getPlayerIId()), any());
+    }
+
+    @Test
+    @RequiresFlagsEnabled(FLAG_LOUDNESS_CONFIGURATOR_API)
+    public void addMediaCodecAfterSetTrack_callsAudioServiceAdd() throws Exception {
+        final AudioTrack track = createAudioTrack();
+
+        mLcc.addMediaCodec(createAndConfigureMediaCodec());
+        mLcc.setAudioTrack(track);
+        verify(mAudioService).startLoudnessCodecUpdates(eq(track.getPlayerIId()), anyList());
+
+        mLcc.addMediaCodec(createAndConfigureMediaCodec());
+        verify(mAudioService).addLoudnessCodecInfo(eq(track.getPlayerIId()), any());
+    }
+
+    @Test
+    @RequiresFlagsEnabled(FLAG_LOUDNESS_CONFIGURATOR_API)
+    public void removeMediaCodecAfterSetTrack_callsAudioServiceRemove() throws Exception {
+        final AudioTrack track = createAudioTrack();
+        final MediaCodec mediaCodec = createAndConfigureMediaCodec();
+
+        mLcc.addMediaCodec(mediaCodec);
+        mLcc.setAudioTrack(track);
+        verify(mAudioService).startLoudnessCodecUpdates(eq(track.getPlayerIId()), anyList());
+
+        mLcc.removeMediaCodec(mediaCodec);
+        verify(mAudioService).removeLoudnessCodecInfo(eq(track.getPlayerIId()), any());
+    }
+
+    @Test
+    @RequiresFlagsEnabled(FLAG_LOUDNESS_CONFIGURATOR_API)
+    public void removeWrongMediaCodecAfterSetTrack_noAudioServiceRemoveCall() throws Exception {
+        final AudioTrack track = createAudioTrack();
+
+        mLcc.addMediaCodec(createAndConfigureMediaCodec());
+        mLcc.setAudioTrack(track);
+        verify(mAudioService).startLoudnessCodecUpdates(eq(track.getPlayerIId()), anyList());
+
+        mLcc.removeMediaCodec(createAndConfigureMediaCodec());
+        verify(mAudioService, times(0)).removeLoudnessCodecInfo(eq(track.getPlayerIId()), any());
+    }
+
+    private static AudioTrack createAudioTrack() {
+        return new AudioTrack.Builder()
+                .setAudioAttributes(new AudioAttributes.Builder().build())
+                .setBufferSizeInBytes(TEST_AUDIO_TRACK_BUFFER_SIZE)
+                .setAudioFormat(new AudioFormat.Builder()
+                        .setChannelMask(TEST_AUDIO_TRACK_CHANNELS)
+                        .setSampleRate(TEST_AUDIO_TRACK_SAMPLERATE).build())
+                .build();
+    }
+
+    private MediaCodec createAndConfigureMediaCodec() throws Exception {
+        AssetFileDescriptor testFd = InstrumentationRegistry.getInstrumentation().getContext()
+                .getResources()
+                .openRawResourceFd(R.raw.noise_2ch_48khz_tlou_19lufs_anchor_17lufs_mp4);
+
+        MediaExtractor extractor;
+        extractor = new MediaExtractor();
+        extractor.setDataSource(testFd.getFileDescriptor(), testFd.getStartOffset(),
+                testFd.getLength());
+        testFd.close();
+
+        assertEquals("wrong number of tracks", 1, extractor.getTrackCount());
+        MediaFormat format = extractor.getTrackFormat(0);
+        String mime = format.getString(MediaFormat.KEY_MIME);
+        assertTrue("not an audio file", mime.startsWith(TEST_MEDIA_AUDIO_CODEC_PREFIX));
+        final MediaCodec mediaCodec = MediaCodec.createDecoderByType(mime);
+
+        Log.v(TAG, "configuring with " + format);
+        mediaCodec.configure(format, null /* surface */, null /* crypto */, 0 /* flags */);
+
+        return mediaCodec;
+    }
+}
diff --git a/services/core/java/com/android/server/audio/AudioService.java b/services/core/java/com/android/server/audio/AudioService.java
index e7ea0be..9701fc8 100644
--- a/services/core/java/com/android/server/audio/AudioService.java
+++ b/services/core/java/com/android/server/audio/AudioService.java
@@ -107,6 +107,7 @@
 import android.media.AudioRecordingConfiguration;
 import android.media.AudioRoutesInfo;
 import android.media.AudioSystem;
+import android.media.AudioTrack;
 import android.media.BluetoothProfileConnectionInfo;
 import android.media.IAudioDeviceVolumeDispatcher;
 import android.media.IAudioFocusDispatcher;
@@ -133,7 +134,9 @@
 import android.media.IStrategyPreferredDevicesDispatcher;
 import android.media.IStreamAliasingDispatcher;
 import android.media.IVolumeController;
-import android.media.LoudnessCodecFormat;
+import android.media.LoudnessCodecConfigurator;
+import android.media.LoudnessCodecInfo;
+import android.media.MediaCodec;
 import android.media.MediaMetrics;
 import android.media.MediaRecorder.AudioSource;
 import android.media.PlayerBase;
@@ -347,7 +350,7 @@
     }
 
     /*package*/ boolean isPlatformAutomotive() {
-        return mContext.getPackageManager().hasSystemFeature(PackageManager.FEATURE_AUTOMOTIVE);
+        return mPlatformType == AudioSystem.PLATFORM_AUTOMOTIVE;
     }
 
     /** The controller for the volume UI. */
@@ -941,6 +944,8 @@
 
     private final SoundDoseHelper mSoundDoseHelper;
 
+    private final LoudnessCodecHelper mLoudnessCodecHelper;
+
     private final Object mSupportedSystemUsagesLock = new Object();
     @GuardedBy("mSupportedSystemUsagesLock")
     private @AttributeSystemUsage int[] mSupportedSystemUsages =
@@ -1275,6 +1280,8 @@
         readPersistedSettings();
         readUserRestrictions();
 
+        mLoudnessCodecHelper = new LoudnessCodecHelper(this);
+
         mPlaybackMonitor =
                 new PlaybackActivityMonitor(context, MAX_STREAM_VOLUME[AudioSystem.STREAM_ALARM],
                         device -> onMuteAwaitConnectionTimeout(device));
@@ -4366,6 +4373,8 @@
             mSoundDoseHelper.scheduleMusicActiveCheck();
         }
 
+        mLoudnessCodecHelper.updateCodecParameters(configs);
+
         // Update playback active state for all apps in audio mode stack.
         // When the audio mode owner becomes active, replace any delayed MSG_UPDATE_AUDIO_MODE
         // and request an audio mode update immediately. Upon any other change, queue the message
@@ -10562,44 +10571,43 @@
 
     @Override
     public void registerLoudnessCodecUpdatesDispatcher(ILoudnessCodecUpdatesDispatcher dispatcher) {
-        // TODO: implement
+        mLoudnessCodecHelper.registerLoudnessCodecUpdatesDispatcher(dispatcher);
     }
 
     @Override
     public void unregisterLoudnessCodecUpdatesDispatcher(
             ILoudnessCodecUpdatesDispatcher dispatcher) {
-        // TODO: implement
+        mLoudnessCodecHelper.unregisterLoudnessCodecUpdatesDispatcher(dispatcher);
     }
 
+    /** @see LoudnessCodecConfigurator#setAudioTrack(AudioTrack) */
     @Override
-    public void startLoudnessCodecUpdates(int piid) {
-        // TODO: implement
+    public void startLoudnessCodecUpdates(int piid, List<LoudnessCodecInfo> codecInfoList) {
+        mLoudnessCodecHelper.startLoudnessCodecUpdates(piid, codecInfoList);
     }
 
+    /** @see LoudnessCodecConfigurator#setAudioTrack(AudioTrack) */
     @Override
     public void stopLoudnessCodecUpdates(int piid) {
-        // TODO: implement
+        mLoudnessCodecHelper.stopLoudnessCodecUpdates(piid);
     }
 
+    /** @see LoudnessCodecConfigurator#addMediaCodec(MediaCodec) */
     @Override
-    public void addLoudnesssCodecFormat(int piid, LoudnessCodecFormat format) {
-        // TODO: implement
+    public void addLoudnessCodecInfo(int piid, LoudnessCodecInfo codecInfo) {
+        mLoudnessCodecHelper.addLoudnessCodecInfo(piid, codecInfo);
     }
 
+    /** @see LoudnessCodecConfigurator#removeMediaCodec(MediaCodec) */
     @Override
-    public void addLoudnesssCodecFormatList(int piid, List<LoudnessCodecFormat> format) {
-        // TODO: implement
+    public void removeLoudnessCodecInfo(int piid, LoudnessCodecInfo codecInfo) {
+        mLoudnessCodecHelper.removeLoudnessCodecInfo(piid, codecInfo);
     }
 
+    /** @see LoudnessCodecConfigurator#getLoudnessCodecParams(AudioTrack, MediaCodec) */
     @Override
-    public void removeLoudnessCodecFormat(int piid, LoudnessCodecFormat format) {
-        // TODO: implement
-    }
-
-    @Override
-    public PersistableBundle getLoudnessParams(int piid, LoudnessCodecFormat format) {
-        // TODO: implement
-        return null;
+    public PersistableBundle getLoudnessParams(int piid, LoudnessCodecInfo codecInfo) {
+        return mLoudnessCodecHelper.getLoudnessParams(piid, codecInfo);
     }
 
     //==========================================================================================
diff --git a/services/core/java/com/android/server/audio/LoudnessCodecHelper.java b/services/core/java/com/android/server/audio/LoudnessCodecHelper.java
new file mode 100644
index 0000000..3c67e9d
--- /dev/null
+++ b/services/core/java/com/android/server/audio/LoudnessCodecHelper.java
@@ -0,0 +1,513 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.audio;
+
+import static android.media.AudioManager.AUDIO_DEVICE_CATEGORY_CARKIT;
+import static android.media.AudioManager.AUDIO_DEVICE_CATEGORY_HEADPHONES;
+import static android.media.AudioManager.AUDIO_DEVICE_CATEGORY_HEARING_AID;
+import static android.media.AudioManager.AUDIO_DEVICE_CATEGORY_WATCH;
+import static android.media.AudioPlaybackConfiguration.PLAYER_DEVICEID_INVALID;
+
+import android.annotation.IntDef;
+import android.annotation.NonNull;
+import android.media.AudioDeviceInfo;
+import android.media.AudioPlaybackConfiguration;
+import android.media.AudioSystem;
+import android.media.ILoudnessCodecUpdatesDispatcher;
+import android.media.LoudnessCodecInfo;
+import android.media.permission.ClearCallingIdentityContext;
+import android.media.permission.SafeCloseable;
+import android.os.Binder;
+import android.os.PersistableBundle;
+import android.os.RemoteCallbackList;
+import android.os.RemoteException;
+import android.os.SystemProperties;
+import android.util.Log;
+import android.util.SparseArray;
+import android.util.SparseIntArray;
+
+import com.android.internal.annotations.GuardedBy;
+
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Objects;
+import java.util.Set;
+
+/**
+ * Class to handle the updates in loudness parameters and responsible to generate parameters that
+ * can be set directly on a MediaCodec.
+ */
+public class LoudnessCodecHelper {
+    private static final String TAG = "AS.LoudnessCodecHelper";
+
+    private static final boolean DEBUG = false;
+
+    /**
+     * Property containing a string to set for a custom built in speaker SPL range as defined by
+     * CTA2075. The options that can be set are:
+     *   - "small": for max SPL with test signal < 75 dB,
+     *   - "medium": for max SPL with test signal between 70 and 90 dB,
+     *   - "large": for max SPL with test signal > 85 dB.
+     */
+    private static final String SYSTEM_PROPERTY_SPEAKER_SPL_RANGE_SIZE =
+            "audio.loudness.builtin-speaker-spl-range-size";
+
+    private static final int SPL_RANGE_UNKNOWN = 0;
+    private static final int SPL_RANGE_SMALL = 1;
+    private static final int SPL_RANGE_MEDIUM = 2;
+    private static final int SPL_RANGE_LARGE = 3;
+
+    /** The possible transducer SPL ranges as defined in CTA2075 */
+    @IntDef({
+            SPL_RANGE_UNKNOWN,
+            SPL_RANGE_SMALL,
+            SPL_RANGE_MEDIUM,
+            SPL_RANGE_LARGE
+    })
+    @Retention(RetentionPolicy.SOURCE)
+    public @interface DeviceSplRange {}
+
+    private static final class LoudnessRemoteCallbackList extends
+            RemoteCallbackList<ILoudnessCodecUpdatesDispatcher> {
+        private final LoudnessCodecHelper mLoudnessCodecHelper;
+        LoudnessRemoteCallbackList(LoudnessCodecHelper loudnessCodecHelper) {
+            mLoudnessCodecHelper = loudnessCodecHelper;
+        }
+
+        @Override
+        public void onCallbackDied(ILoudnessCodecUpdatesDispatcher callback, Object cookie) {
+            Integer pid = null;
+            if (cookie instanceof Integer) {
+                pid = (Integer) cookie;
+            }
+            if (pid != null) {
+                mLoudnessCodecHelper.removePid(pid);
+            }
+            super.onCallbackDied(callback, cookie);
+        }
+    }
+
+    private final LoudnessRemoteCallbackList mLoudnessUpdateDispatchers =
+            new LoudnessRemoteCallbackList(this);
+
+    private final Object mLock = new Object();
+
+    /** Contains for each started piid the set corresponding to unique registered audio codecs. */
+    @GuardedBy("mLock")
+    private final SparseArray<Set<LoudnessCodecInfo>> mStartedPiids = new SparseArray<>();
+
+    /** Contains the current device id assignment for each piid. */
+    @GuardedBy("mLock")
+    private final SparseIntArray mPiidToDeviceIdCache = new SparseIntArray();
+
+    /** Maps each piid to the owner process of the player. */
+    @GuardedBy("mLock")
+    private final SparseIntArray mPiidToPidCache = new SparseIntArray();
+
+    private final AudioService mAudioService;
+
+    /** Contains the properties necessary to compute the codec loudness related parameters. */
+    private static final class LoudnessCodecInputProperties {
+        private final int mMetadataType;
+
+        private final boolean mIsDownmixing;
+
+        @DeviceSplRange
+        private final int mDeviceSplRange;
+
+        static final class Builder {
+            private int mMetadataType;
+
+            private boolean mIsDownmixing;
+
+            @DeviceSplRange
+            private int mDeviceSplRange;
+
+            Builder setMetadataType(int metadataType) {
+                mMetadataType = metadataType;
+                return this;
+            }
+            Builder setIsDownmixing(boolean isDownmixing) {
+                mIsDownmixing = isDownmixing;
+                return this;
+            }
+            Builder setDeviceSplRange(@DeviceSplRange int deviceSplRange) {
+                mDeviceSplRange = deviceSplRange;
+                return this;
+            }
+
+            LoudnessCodecInputProperties build() {
+                return new LoudnessCodecInputProperties(mMetadataType,
+                        mIsDownmixing, mDeviceSplRange);
+            }
+        }
+
+        private LoudnessCodecInputProperties(int metadataType,
+                                             boolean isDownmixing,
+                                             @DeviceSplRange int deviceSplRange) {
+            mMetadataType = metadataType;
+            mIsDownmixing = isDownmixing;
+            mDeviceSplRange = deviceSplRange;
+        }
+
+        @Override
+        public boolean equals(Object obj) {
+            if (this == obj) {
+                return true;
+            }
+            if (obj == null) {
+                return false;
+            }
+            // type check and cast
+            if (getClass() != obj.getClass()) {
+                return false;
+            }
+            final LoudnessCodecInputProperties lcip = (LoudnessCodecInputProperties) obj;
+            return mMetadataType == lcip.mMetadataType
+                    && mIsDownmixing == lcip.mIsDownmixing
+                    && mDeviceSplRange == lcip.mDeviceSplRange;
+        }
+
+        @Override
+        public int hashCode() {
+            return Objects.hash(mMetadataType, mIsDownmixing, mDeviceSplRange);
+        }
+
+        @Override
+        public String toString() {
+            return "Loudness properties:"
+                    + " device SPL range: " + splRangeToString(mDeviceSplRange)
+                    + " down-mixing: " + mIsDownmixing
+                    + " metadata type: " + mMetadataType;
+        }
+
+        PersistableBundle createLoudnessParameters() {
+            // TODO: create bundle with new parameters
+            return new PersistableBundle();
+        }
+
+    }
+
+    @GuardedBy("mLock")
+    private final HashMap<LoudnessCodecInputProperties, PersistableBundle> mCachedProperties =
+            new HashMap<>();
+
+    LoudnessCodecHelper(@NonNull AudioService audioService) {
+        mAudioService = Objects.requireNonNull(audioService);
+    }
+
+    void registerLoudnessCodecUpdatesDispatcher(ILoudnessCodecUpdatesDispatcher dispatcher) {
+        mLoudnessUpdateDispatchers.register(dispatcher, Binder.getCallingPid());
+    }
+
+    void unregisterLoudnessCodecUpdatesDispatcher(
+            ILoudnessCodecUpdatesDispatcher dispatcher) {
+        mLoudnessUpdateDispatchers.unregister(dispatcher);
+    }
+
+    void startLoudnessCodecUpdates(int piid, List<LoudnessCodecInfo> codecInfoList) {
+        if (DEBUG) {
+            Log.d(TAG, "startLoudnessCodecUpdates: piid " + piid + " codecInfos " + codecInfoList);
+        }
+        Set<LoudnessCodecInfo> infoSet;
+        synchronized (mLock) {
+            if (mStartedPiids.contains(piid)) {
+                Log.w(TAG, "Already started loudness updates for piid " + piid);
+                return;
+            }
+            infoSet = new HashSet<>(codecInfoList);
+            mStartedPiids.put(piid, infoSet);
+
+            mPiidToPidCache.put(piid, Binder.getCallingPid());
+        }
+
+        try (SafeCloseable ignored = ClearCallingIdentityContext.create()) {
+            mAudioService.getActivePlaybackConfigurations().stream().filter(
+                    conf -> conf.getPlayerInterfaceId() == piid).findFirst().ifPresent(
+                            apc -> updateCodecParametersForConfiguration(apc, infoSet));
+        }
+    }
+
+    void stopLoudnessCodecUpdates(int piid) {
+        if (DEBUG) {
+            Log.d(TAG, "stopLoudnessCodecUpdates: piid " + piid);
+        }
+        synchronized (mLock) {
+            if (!mStartedPiids.contains(piid)) {
+                Log.w(TAG, "Loudness updates are already stopped for piid " + piid);
+                return;
+            }
+            mStartedPiids.remove(piid);
+            mPiidToDeviceIdCache.delete(piid);
+            mPiidToPidCache.delete(piid);
+        }
+    }
+
+    void addLoudnessCodecInfo(int piid, LoudnessCodecInfo info) {
+        if (DEBUG) {
+            Log.d(TAG, "addLoudnessCodecInfo: piid " + piid + " info " + info);
+        }
+
+        Set<LoudnessCodecInfo> infoSet;
+        synchronized (mLock) {
+            if (!mStartedPiids.contains(piid)) {
+                Log.w(TAG, "Cannot add new loudness info for stopped piid " + piid);
+                return;
+            }
+
+            infoSet = mStartedPiids.get(piid);
+            infoSet.add(info);
+        }
+
+        try (SafeCloseable ignored = ClearCallingIdentityContext.create()) {
+            mAudioService.getActivePlaybackConfigurations().stream().filter(
+                    conf -> conf.getPlayerInterfaceId() == piid).findFirst().ifPresent(
+                            apc -> updateCodecParametersForConfiguration(apc, Set.of(info)));
+        }
+    }
+
+    void removeLoudnessCodecInfo(int piid, LoudnessCodecInfo codecInfo) {
+        if (DEBUG) {
+            Log.d(TAG, "removeLoudnessCodecInfo: piid " + piid + " info " + codecInfo);
+        }
+        synchronized (mLock) {
+            if (!mStartedPiids.contains(piid)) {
+                Log.w(TAG, "Cannot remove loudness info for stopped piid " + piid);
+                return;
+            }
+            final Set<LoudnessCodecInfo> infoSet = mStartedPiids.get(piid);
+            infoSet.remove(codecInfo);
+        }
+    }
+
+    void removePid(int pid) {
+        if (DEBUG) {
+            Log.d(TAG, "Removing pid " + pid + " from receiving updates");
+        }
+        synchronized (mLock) {
+            for (int i = 0; i < mPiidToPidCache.size(); ++i) {
+                int piid = mPiidToPidCache.keyAt(i);
+                if (mPiidToPidCache.get(piid) == pid) {
+                    if (DEBUG) {
+                        Log.d(TAG, "Removing piid  " + piid);
+                    }
+                    mStartedPiids.delete(piid);
+                    mPiidToDeviceIdCache.delete(piid);
+                }
+            }
+        }
+    }
+
+    PersistableBundle getLoudnessParams(int piid, LoudnessCodecInfo codecInfo) {
+        if (DEBUG) {
+            Log.d(TAG, "getLoudnessParams: piid " + piid + " codecInfo " + codecInfo);
+        }
+        try (SafeCloseable ignored = ClearCallingIdentityContext.create()) {
+            final List<AudioPlaybackConfiguration> configs =
+                    mAudioService.getActivePlaybackConfigurations();
+
+            for (final AudioPlaybackConfiguration apc : configs) {
+                if (apc.getPlayerInterfaceId() == piid) {
+                    final AudioDeviceInfo info = apc.getAudioDeviceInfo();
+                    if (info == null) {
+                        Log.i(TAG, "Player with piid " + piid + " is not assigned any device");
+                        break;
+                    }
+                    synchronized (mLock) {
+                        return getCodecBundle_l(info, codecInfo);
+                    }
+                }
+            }
+        }
+
+        // return empty Bundle
+        return new PersistableBundle();
+    }
+
+    /** Method to be called whenever there is a changed in the active playback configurations. */
+    void updateCodecParameters(List<AudioPlaybackConfiguration> configs) {
+        if (DEBUG) {
+            Log.d(TAG, "updateCodecParameters: configs " + configs);
+        }
+
+        List<AudioPlaybackConfiguration> updateApcList = new ArrayList<>();
+        synchronized (mLock) {
+            for (final AudioPlaybackConfiguration apc : configs) {
+                int piid = apc.getPlayerInterfaceId();
+                int cachedDeviceId = mPiidToDeviceIdCache.get(piid, PLAYER_DEVICEID_INVALID);
+                AudioDeviceInfo deviceInfo = apc.getAudioDeviceInfo();
+                if (deviceInfo == null) {
+                    if (DEBUG) {
+                        Log.d(TAG, "No device info for piid: " + piid);
+                    }
+                    if (cachedDeviceId != PLAYER_DEVICEID_INVALID) {
+                        mPiidToDeviceIdCache.delete(piid);
+                        if (DEBUG) {
+                            Log.d(TAG, "Remove cached device id for piid: " + piid);
+                        }
+                    }
+                    continue;
+                }
+                if (cachedDeviceId == deviceInfo.getId()) {
+                    // deviceId did not change
+                    if (DEBUG) {
+                        Log.d(TAG, "DeviceId " + cachedDeviceId + " for piid: " + piid
+                                + " did not change");
+                    }
+                    continue;
+                }
+                mPiidToDeviceIdCache.put(piid, deviceInfo.getId());
+                if (mStartedPiids.contains(piid)) {
+                    updateApcList.add(apc);
+                }
+            }
+        }
+
+        updateApcList.forEach(apc -> updateCodecParametersForConfiguration(apc, null));
+    }
+
+    /** Updates and dispatches the new loudness parameters for the {@code codecInfos} set.
+     *
+     * @param apc the player configuration for which the loudness parameters are updated.
+     * @param codecInfos the codec info for which the parameters are updated. If {@code null},
+     *                   send updates for all the started codecs assigned to {@code apc}
+     */
+    private void updateCodecParametersForConfiguration(AudioPlaybackConfiguration apc,
+            Set<LoudnessCodecInfo> codecInfos) {
+        if (DEBUG) {
+            Log.d(TAG, "updateCodecParametersForConfiguration apc:" + apc + " codecInfos: "
+                    + codecInfos);
+        }
+        final PersistableBundle allBundles = new PersistableBundle();
+        final int piid = apc.getPlayerInterfaceId();
+        synchronized (mLock) {
+            if (codecInfos == null) {
+                codecInfos = mStartedPiids.get(piid);
+            }
+
+            final AudioDeviceInfo deviceInfo = apc.getAudioDeviceInfo();
+            if (codecInfos != null && deviceInfo != null) {
+                for (LoudnessCodecInfo info : codecInfos) {
+                    allBundles.putPersistableBundle(Integer.toString(info.mediaCodecHashCode),
+                            getCodecBundle_l(deviceInfo, info));
+                }
+            }
+        }
+
+        if (!allBundles.isDefinitelyEmpty()) {
+            if (DEBUG) {
+                Log.d(TAG, "Dispatching for piid: " + piid + " bundle: " + allBundles);
+            }
+            dispatchNewLoudnessParameters(piid, allBundles);
+        }
+    }
+
+    private void dispatchNewLoudnessParameters(int piid, PersistableBundle bundle) {
+        if (DEBUG) {
+            Log.d(TAG, "dispatchNewLoudnessParameters: piid " + piid);
+        }
+        final int nbDispatchers = mLoudnessUpdateDispatchers.beginBroadcast();
+        for (int i = 0; i < nbDispatchers; ++i) {
+            try {
+                mLoudnessUpdateDispatchers.getBroadcastItem(i)
+                        .dispatchLoudnessCodecParameterChange(piid, bundle);
+            } catch (RemoteException e) {
+                Log.e(TAG, "Error dispatching for piid: " + piid + " bundle: " + bundle , e);
+            }
+        }
+        mLoudnessUpdateDispatchers.finishBroadcast();
+    }
+
+    @GuardedBy("mLock")
+    private PersistableBundle getCodecBundle_l(AudioDeviceInfo deviceInfo,
+                                             LoudnessCodecInfo codecInfo) {
+        LoudnessCodecInputProperties.Builder builder = new LoudnessCodecInputProperties.Builder();
+        LoudnessCodecInputProperties prop = builder.setDeviceSplRange(getDeviceSplRange(deviceInfo))
+                .setIsDownmixing(codecInfo.isDownmixing)
+                .setMetadataType(codecInfo.metadataType)
+                .build();
+
+        if (mCachedProperties.containsKey(prop)) {
+            return mCachedProperties.get(prop);
+        }
+        final PersistableBundle codecBundle = prop.createLoudnessParameters();
+        mCachedProperties.put(prop, codecBundle);
+        return codecBundle;
+    }
+
+    @DeviceSplRange
+    private int getDeviceSplRange(AudioDeviceInfo deviceInfo) {
+        final int internalDeviceType = deviceInfo.getInternalType();
+        if (internalDeviceType == AudioSystem.DEVICE_OUT_SPEAKER) {
+            final String splRange = SystemProperties.get(
+                    SYSTEM_PROPERTY_SPEAKER_SPL_RANGE_SIZE, "unknown");
+            if (!splRange.equals("unknown")) {
+                return stringToSplRange(splRange);
+            }
+
+            @DeviceSplRange int result = SPL_RANGE_SMALL;  // default for phone/tablet/watch
+            if (mAudioService.isPlatformAutomotive() || mAudioService.isPlatformTelevision()) {
+                result = SPL_RANGE_MEDIUM;
+            }
+
+            return result;
+        } else if (internalDeviceType == AudioSystem.DEVICE_OUT_USB_HEADSET
+                || internalDeviceType == AudioSystem.DEVICE_OUT_WIRED_HEADPHONE
+                || internalDeviceType == AudioSystem.DEVICE_OUT_WIRED_HEADSET
+                || (AudioSystem.isBluetoothDevice(internalDeviceType)
+                && mAudioService.getBluetoothAudioDeviceCategory(deviceInfo.getAddress(),
+                AudioSystem.isBluetoothLeDevice(internalDeviceType))
+                == AUDIO_DEVICE_CATEGORY_HEADPHONES)) {
+            return SPL_RANGE_LARGE;
+        } else if (AudioSystem.isBluetoothDevice(internalDeviceType)) {
+            final int audioDeviceType = mAudioService.getBluetoothAudioDeviceCategory(
+                    deviceInfo.getAddress(), AudioSystem.isBluetoothLeDevice(internalDeviceType));
+            if (audioDeviceType == AUDIO_DEVICE_CATEGORY_CARKIT) {
+                return SPL_RANGE_MEDIUM;
+            } else if (audioDeviceType == AUDIO_DEVICE_CATEGORY_WATCH) {
+                return SPL_RANGE_SMALL;
+            } else if (audioDeviceType == AUDIO_DEVICE_CATEGORY_HEARING_AID) {
+                return SPL_RANGE_SMALL;
+            }
+        }
+
+        return SPL_RANGE_UNKNOWN;
+    }
+
+    private static String splRangeToString(@DeviceSplRange int splRange) {
+        switch (splRange) {
+            case SPL_RANGE_LARGE: return "large";
+            case SPL_RANGE_MEDIUM: return "medium";
+            case SPL_RANGE_SMALL: return "small";
+            default: return "unknown";
+        }
+    }
+
+    @DeviceSplRange
+    private static int stringToSplRange(String splRange) {
+        switch (splRange) {
+            case "large": return SPL_RANGE_LARGE;
+            case "medium": return SPL_RANGE_MEDIUM;
+            case "small": return SPL_RANGE_SMALL;
+            default: return SPL_RANGE_UNKNOWN;
+        }
+    }
+}
diff --git a/services/tests/servicestests/src/com/android/server/audio/LoudnessCodecHelperTest.java b/services/tests/servicestests/src/com/android/server/audio/LoudnessCodecHelperTest.java
new file mode 100644
index 0000000..749b07d
--- /dev/null
+++ b/services/tests/servicestests/src/com/android/server/audio/LoudnessCodecHelperTest.java
@@ -0,0 +1,232 @@
+/*
+ * Copyright 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.android.server.audio;
+
+import static android.media.AudioManager.GET_DEVICES_OUTPUTS;
+import static android.media.AudioPlaybackConfiguration.PLAYER_UPDATE_DEVICE_ID;
+import static android.media.LoudnessCodecInfo.CodecMetadataType.CODEC_METADATA_TYPE_MPEG_4;
+import static android.media.LoudnessCodecInfo.CodecMetadataType.CODEC_METADATA_TYPE_MPEG_D;
+
+import static org.junit.Assume.assumeTrue;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.eq;
+import static org.mockito.Mockito.times;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+import android.media.AudioDeviceInfo;
+import android.media.AudioManager;
+import android.media.AudioPlaybackConfiguration;
+import android.media.ILoudnessCodecUpdatesDispatcher;
+import android.media.LoudnessCodecInfo;
+import android.media.PlayerBase;
+import android.os.IBinder;
+import android.platform.test.annotations.Presubmit;
+import android.util.Log;
+
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+
+import org.junit.Before;
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.Mockito;
+import org.mockito.junit.MockitoJUnit;
+import org.mockito.junit.MockitoRule;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Random;
+
+@RunWith(AndroidJUnit4.class)
+@Presubmit
+public class LoudnessCodecHelperTest {
+    private static final String TAG = "LoudnessCodecHelperTest";
+
+    @Rule
+    public final MockitoRule mockito = MockitoJUnit.rule();
+
+    private LoudnessCodecHelper mLoudnessHelper;
+
+    @Mock
+    private AudioService mAudioService;
+    @Mock
+    private ILoudnessCodecUpdatesDispatcher.Default mDispatcher;
+
+    private final int mInitialApcPiid = 1;
+
+    @Before
+    public void setUp() throws Exception {
+        mLoudnessHelper = new LoudnessCodecHelper(mAudioService);
+
+        when(mAudioService.getActivePlaybackConfigurations()).thenReturn(
+                getApcListForPiids(mInitialApcPiid));
+
+        when(mDispatcher.asBinder()).thenReturn(Mockito.mock(IBinder.class));
+    }
+
+    @Test
+    public void registerDispatcher_sendsInitialUpdateOnStart() throws Exception {
+        mLoudnessHelper.registerLoudnessCodecUpdatesDispatcher(mDispatcher);
+
+        mLoudnessHelper.startLoudnessCodecUpdates(mInitialApcPiid,
+                List.of(getLoudnessInfo(/*mediaCodecHash=*/111, /*isDownmixing=*/true,
+                        CODEC_METADATA_TYPE_MPEG_4)));
+
+        verify(mDispatcher).dispatchLoudnessCodecParameterChange(eq(mInitialApcPiid), any());
+    }
+
+    @Test
+    public void unregisterDispatcher_noInitialUpdateOnStart() throws Exception {
+        mLoudnessHelper.registerLoudnessCodecUpdatesDispatcher(mDispatcher);
+        mLoudnessHelper.unregisterLoudnessCodecUpdatesDispatcher(mDispatcher);
+
+        mLoudnessHelper.startLoudnessCodecUpdates(mInitialApcPiid,
+                List.of(getLoudnessInfo(/*mediaCodecHash=*/222, /*isDownmixing=*/false,
+                        CODEC_METADATA_TYPE_MPEG_D)));
+
+        verify(mDispatcher, times(0)).dispatchLoudnessCodecParameterChange(eq(mInitialApcPiid),
+                any());
+    }
+
+    @Test
+    public void addCodecInfo_sendsInitialUpdateAfterStart() throws Exception {
+        mLoudnessHelper.registerLoudnessCodecUpdatesDispatcher(mDispatcher);
+
+        mLoudnessHelper.startLoudnessCodecUpdates(mInitialApcPiid,
+                List.of(getLoudnessInfo(/*mediaCodecHash=*/111, /*isDownmixing=*/true,
+                        CODEC_METADATA_TYPE_MPEG_4)));
+        mLoudnessHelper.addLoudnessCodecInfo(mInitialApcPiid,
+                getLoudnessInfo(/*mediaCodecHash=*/222, /*isDownmixing=*/true,
+                        CODEC_METADATA_TYPE_MPEG_D));
+
+        verify(mDispatcher, times(2)).dispatchLoudnessCodecParameterChange(eq(mInitialApcPiid),
+                any());
+    }
+
+    @Test
+    public void addCodecInfoForUnstartedPiid_noUpdateSent() throws Exception {
+        final int newPiid = 2;
+        mLoudnessHelper.registerLoudnessCodecUpdatesDispatcher(mDispatcher);
+
+        mLoudnessHelper.startLoudnessCodecUpdates(mInitialApcPiid,
+                List.of(getLoudnessInfo(/*mediaCodecHash=*/111, /*isDownmixing=*/true,
+                        CODEC_METADATA_TYPE_MPEG_4)));
+        mLoudnessHelper.addLoudnessCodecInfo(newPiid,
+                getLoudnessInfo(/*mediaCodecHash=*/222, /*isDownmixing=*/true,
+                        CODEC_METADATA_TYPE_MPEG_D));
+
+        verify(mDispatcher, times(1)).dispatchLoudnessCodecParameterChange(eq(mInitialApcPiid),
+                any());
+    }
+
+    @Test
+    public void updateCodecParameters_updatesOnlyStartedPiids() throws Exception {
+        final int newPiid = 2;
+        mLoudnessHelper.registerLoudnessCodecUpdatesDispatcher(mDispatcher);
+
+        mLoudnessHelper.startLoudnessCodecUpdates(mInitialApcPiid,
+                List.of(getLoudnessInfo(/*mediaCodecHash=*/111, /*isDownmixing=*/true,
+                        CODEC_METADATA_TYPE_MPEG_4)));
+        //does not trigger dispatch since active apc list does not contain newPiid
+        mLoudnessHelper.startLoudnessCodecUpdates(newPiid,
+                List.of(getLoudnessInfo(/*mediaCodecHash=*/222, /*isDownmixing=*/true,
+                        CODEC_METADATA_TYPE_MPEG_D)));
+        verify(mDispatcher, times(1)).dispatchLoudnessCodecParameterChange(eq(mInitialApcPiid),
+                any());
+
+        // triggers dispatch for new active apc with newPiid
+        mLoudnessHelper.updateCodecParameters(getApcListForPiids(newPiid));
+        verify(mDispatcher, times(1)).dispatchLoudnessCodecParameterChange(eq(newPiid), any());
+    }
+
+    @Test
+    public void updateCodecParameters_noStartedPiids_noDispatch() throws Exception {
+        mLoudnessHelper.registerLoudnessCodecUpdatesDispatcher(mDispatcher);
+        mLoudnessHelper.addLoudnessCodecInfo(mInitialApcPiid,
+                getLoudnessInfo(/*mediaCodecHash=*/222, /*isDownmixing=*/true,
+                        CODEC_METADATA_TYPE_MPEG_D));
+
+        mLoudnessHelper.updateCodecParameters(getApcListForPiids(mInitialApcPiid));
+
+        // no dispatch since mInitialApcPiid was not started
+        verify(mDispatcher, times(0)).dispatchLoudnessCodecParameterChange(eq(mInitialApcPiid),
+                any());
+    }
+
+    @Test
+    public void updateCodecParameters_removedCodecInfo_noDispatch() throws Exception {
+        final LoudnessCodecInfo info = getLoudnessInfo(/*mediaCodecHash=*/111,
+                /*isDownmixing=*/true, CODEC_METADATA_TYPE_MPEG_4);
+        mLoudnessHelper.registerLoudnessCodecUpdatesDispatcher(mDispatcher);
+
+        mLoudnessHelper.startLoudnessCodecUpdates(mInitialApcPiid, List.of(info));
+        mLoudnessHelper.removeLoudnessCodecInfo(mInitialApcPiid, info);
+
+        mLoudnessHelper.updateCodecParameters(getApcListForPiids(mInitialApcPiid));
+
+        // no second dispatch since codec info was removed for updates
+        verify(mDispatcher, times(1)).dispatchLoudnessCodecParameterChange(eq(mInitialApcPiid),
+                any());
+    }
+
+    @Test
+    public void updateCodecParameters_stoppedPiids_noDispatch() throws Exception {
+        final LoudnessCodecInfo info = getLoudnessInfo(/*mediaCodecHash=*/111,
+                /*isDownmixing=*/true, CODEC_METADATA_TYPE_MPEG_4);
+        mLoudnessHelper.registerLoudnessCodecUpdatesDispatcher(mDispatcher);
+
+        mLoudnessHelper.startLoudnessCodecUpdates(mInitialApcPiid, List.of(info));
+        mLoudnessHelper.stopLoudnessCodecUpdates(mInitialApcPiid);
+
+        mLoudnessHelper.updateCodecParameters(getApcListForPiids(mInitialApcPiid));
+
+        // no second dispatch since piid was removed for updates
+        verify(mDispatcher, times(1)).dispatchLoudnessCodecParameterChange(eq(mInitialApcPiid),
+                any());
+    }
+
+    private List<AudioPlaybackConfiguration> getApcListForPiids(int... piids) {
+        final ArrayList<AudioPlaybackConfiguration> apcList = new ArrayList<>();
+
+        AudioDeviceInfo[] devicesStatic = AudioManager.getDevicesStatic(GET_DEVICES_OUTPUTS);
+        assumeTrue(devicesStatic.length > 0);
+        int index = new Random().nextInt(devicesStatic.length);
+        Log.d(TAG, "Out devices number " + devicesStatic.length + ". Picking index " + index);
+        int deviceId = devicesStatic[index].getId();
+
+        for (int piid : piids) {
+            PlayerBase.PlayerIdCard idCard = Mockito.mock(PlayerBase.PlayerIdCard.class);
+            AudioPlaybackConfiguration apc =
+                    new AudioPlaybackConfiguration(idCard, piid, /*uid=*/1, /*pid=*/1);
+            apc.handleStateEvent(PLAYER_UPDATE_DEVICE_ID, deviceId);
+
+            apcList.add(apc);
+        }
+        return apcList;
+    }
+
+    private static LoudnessCodecInfo getLoudnessInfo(int mediaCodecHash, boolean isDownmixing,
+            int metadataType) {
+        LoudnessCodecInfo info = new LoudnessCodecInfo();
+        info.isDownmixing = isDownmixing;
+        info.mediaCodecHashCode = mediaCodecHash;
+        info.metadataType = metadataType;
+
+        return info;
+    }
+}