Effect AIDL: add Spatializer aidl in audio effect HAL

Spatializer is a union representing parameters for audio spatialization effects

Bug: 273373363
Test: Build
Change-Id: I6e8414238256903aeae171c5b7b7a98fe5f96f89

audio/aidl/Android.bp

@@ -297,6 +297,7 @@ aidl_interface {
         "android/hardware/audio/effect/PresetReverb.aidl",
         "android/hardware/audio/effect/Processing.aidl",
         "android/hardware/audio/effect/Range.aidl",
+        "android/hardware/audio/effect/Spatializer.aidl",
         "android/hardware/audio/effect/State.aidl",
         "android/hardware/audio/effect/VendorExtension.aidl",
         "android/hardware/audio/effect/Virtualizer.aidl",

audio/aidl/aidl_api/android.hardware.audio.effect/current/android/hardware/audio/effect/Parameter.aidl

@@ -60,6 +60,7 @@ union Parameter {
     android.hardware.audio.effect.Visualizer.Id visualizerTag;
     android.hardware.audio.effect.Volume.Id volumeTag;
     android.hardware.audio.effect.Parameter.Tag commonTag;
+    android.hardware.audio.effect.Spatializer.Id spatializerTag;
   }
   @VintfStability
   parcelable Common {
@@ -91,5 +92,6 @@ union Parameter {
     android.hardware.audio.effect.Virtualizer virtualizer;
     android.hardware.audio.effect.Visualizer visualizer;
     android.hardware.audio.effect.Volume volume;
+    android.hardware.audio.effect.Spatializer spatializer;
   }
 }

audio/aidl/aidl_api/android.hardware.audio.effect/current/android/hardware/audio/effect/Range.aidl

@@ -50,6 +50,7 @@ union Range {
   android.hardware.audio.effect.Range.VirtualizerRange[] virtualizer;
   android.hardware.audio.effect.Range.VisualizerRange[] visualizer;
   android.hardware.audio.effect.Range.VolumeRange[] volume;
+  android.hardware.audio.effect.Range.SpatializerRange[] spatializer;
   @VintfStability
   parcelable AcousticEchoCancelerRange {
     android.hardware.audio.effect.AcousticEchoCanceler min;
@@ -111,6 +112,11 @@ union Range {
     android.hardware.audio.effect.PresetReverb max;
   }
   @VintfStability
+  parcelable SpatializerRange {
+    android.hardware.audio.effect.Spatializer min;
+    android.hardware.audio.effect.Spatializer max;
+  }
+  @VintfStability
   parcelable VendorExtensionRange {
     android.hardware.audio.effect.VendorExtension min;
     android.hardware.audio.effect.VendorExtension max;

audio/aidl/aidl_api/android.hardware.audio.effect/current/android/hardware/audio/effect/Spatializer.aidl

@@ -0,0 +1,49 @@
+/*
+ * 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.
+ */
+///////////////////////////////////////////////////////////////////////////////
+// THIS FILE IS IMMUTABLE. DO NOT EDIT IN ANY CASE.                          //
+///////////////////////////////////////////////////////////////////////////////
+
+// This file is a snapshot of an AIDL file. Do not edit it manually. There are
+// two cases:
+// 1). this is a frozen version file - do not edit this in any case.
+// 2). this is a 'current' file. If you make a backwards compatible change to
+//     the interface (from the latest frozen version), the build system will
+//     prompt you to update this file with `m <name>-update-api`.
+//
+// You must not make a backward incompatible change to any AIDL file built
+// with the aidl_interface module type with versions property set. The module
+// type is used to build AIDL files in a way that they can be used across
+// independently updatable components of the system. If a device is shipped
+// with such a backward incompatible change, it has a high risk of breaking
+// later when a module using the interface is updated, e.g., Mainline modules.
+
+package android.hardware.audio.effect;
+@VintfStability
+union Spatializer {
+  android.hardware.audio.effect.VendorExtension vendor;
+  android.media.audio.common.Spatialization.Level spatializationLevel;
+  android.media.audio.common.HeadTracking.Mode headTrackingMode;
+  android.media.audio.common.AudioChannelLayout[] supportedChannelLayout;
+  android.media.audio.common.Spatialization.Mode spatializationMode;
+  float[6] headToStage;
+  const int HEAD_TO_STAGE_VEC_SIZE = 6;
+  @VintfStability
+  union Id {
+    android.hardware.audio.effect.VendorExtension vendorExtensionTag;
+    android.hardware.audio.effect.Spatializer.Tag commonTag;
+  }
+}

audio/aidl/android/hardware/audio/effect/Parameter.aidl

@@ -28,6 +28,7 @@ import android.hardware.audio.effect.HapticGenerator;
 import android.hardware.audio.effect.LoudnessEnhancer;
 import android.hardware.audio.effect.NoiseSuppression;
 import android.hardware.audio.effect.PresetReverb;
+import android.hardware.audio.effect.Spatializer;
 import android.hardware.audio.effect.VendorExtension;
 import android.hardware.audio.effect.Virtualizer;
 import android.hardware.audio.effect.Visualizer;
@@ -103,6 +104,11 @@ union Parameter {
          * directly.
          */
         Parameter.Tag commonTag;
+
+        /**
+         * Parameter tag defined for Spatializer parameters.
+         */
+        Spatializer.Id spatializerTag;
     }
 
     /**
@@ -189,6 +195,7 @@ union Parameter {
         Virtualizer virtualizer;
         Visualizer visualizer;
         Volume volume;
+        Spatializer spatializer;
     }
     Specific specific;
 }

audio/aidl/android/hardware/audio/effect/Range.aidl

@@ -28,6 +28,7 @@ import android.hardware.audio.effect.HapticGenerator;
 import android.hardware.audio.effect.LoudnessEnhancer;
 import android.hardware.audio.effect.NoiseSuppression;
 import android.hardware.audio.effect.PresetReverb;
+import android.hardware.audio.effect.Spatializer;
 import android.hardware.audio.effect.VendorExtension;
 import android.hardware.audio.effect.Virtualizer;
 import android.hardware.audio.effect.Visualizer;
@@ -168,6 +169,12 @@ union Range {
         PresetReverb max;
     }
 
+    @VintfStability
+    parcelable SpatializerRange {
+        Spatializer min;
+        Spatializer max;
+    }
+
     @VintfStability
     parcelable VendorExtensionRange {
         VendorExtension min;
@@ -217,4 +224,5 @@ union Range {
     VirtualizerRange[] virtualizer;
     VisualizerRange[] visualizer;
     VolumeRange[] volume;
+    SpatializerRange[] spatializer;
 }

audio/aidl/android/hardware/audio/effect/Spatializer.aidl

@@ -0,0 +1,80 @@
+/*
+ * 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.hardware.audio.effect;
+
+import android.hardware.audio.effect.VendorExtension;
+import android.media.audio.common.AudioChannelLayout;
+import android.media.audio.common.HeadTracking;
+import android.media.audio.common.Spatialization;
+
+/**
+ * Union representing parameters for audio spatialization effects.
+ *
+ * Sound spatialization simulates sounds around the listener as if they were emanating from virtual
+ * positions based on the original recording.
+ * For more details, refer to the documentation:
+ * https://developer.android.com/reference/android/media/Spatializer.
+ *
+ * android.hardware.audio.effect.Spatializer specifies parameters for the implementation of audio
+ * spatialization effects.
+ *
+ * A Spatializer implementation must report its supported parameter ranges using Capability.Range.
+ * spatializer.
+ */
+@VintfStability
+union Spatializer {
+    /**
+     * Parameter tag to identify the parameters for getParameter().
+     */
+    @VintfStability
+    union Id {
+        VendorExtension vendorExtensionTag;
+        Spatializer.Tag commonTag;
+    }
+
+    /**
+     * Vendor extension implementation for additional parameters.
+     */
+    VendorExtension vendor;
+
+    /**
+     * Level of spatialization.
+     */
+    Spatialization.Level spatializationLevel;
+
+    /**
+     * Head tracking mode for spatialization.
+     */
+    HeadTracking.Mode headTrackingMode;
+
+    /**
+     * List of supported input channel layouts.
+     */
+    AudioChannelLayout[] supportedChannelLayout;
+
+    /**
+     * Spatialization mode, Binaural or Transaural for example.
+     */
+    Spatialization.Mode spatializationMode;
+
+    /**
+     * Vector representing of the head-to-stage pose with six floats: first three are a translation
+     * vector, and the last three are a rotation vector.
+     */
+    const int HEAD_TO_STAGE_VEC_SIZE = 6;
+    float[HEAD_TO_STAGE_VEC_SIZE] headToStage;
+}