Merge "Hotword: Add onStopDetection() for software detectors." into sc-dev am: 76660ef721

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/14718524

Change-Id: Id52a02d9e7c53b3d8fe373397452d20c36fa6a1c

core/api/system-current.txt

@@ -10565,6 +10565,7 @@ package android.service.voice {
     method public void onDetect(@NonNull android.service.voice.AlwaysOnHotwordDetector.EventPayload, long, @NonNull android.service.voice.HotwordDetectionService.Callback);
     method public void onDetect(@NonNull android.service.voice.HotwordDetectionService.Callback);
     method public void onDetect(@NonNull android.os.ParcelFileDescriptor, @NonNull android.media.AudioFormat, @Nullable android.os.PersistableBundle, @NonNull android.service.voice.HotwordDetectionService.Callback);
+    method public void onStopDetection();
     method public void onUpdateState(@Nullable android.os.PersistableBundle, @Nullable android.os.SharedMemory, long, @Nullable java.util.function.IntConsumer);
     field public static final int INITIALIZATION_STATUS_SUCCESS = 0; // 0x0
     field public static final int INITIALIZATION_STATUS_UNKNOWN = 100; // 0x64

core/java/android/service/voice/HotwordDetectionService.java

@@ -192,6 +192,11 @@ public abstract class HotwordDetectionService extends Service {
             mContentCaptureManager = new ContentCaptureManager(
                     HotwordDetectionService.this, manager, options);
         }
+
+        @Override
+        public void stopDetection() {
+            HotwordDetectionService.this.onStopDetection();
+        }
     };
 
     @Override
@@ -348,6 +353,15 @@ public abstract class HotwordDetectionService extends Service {
         onUpdateState(options, sharedMemory, UPDATE_TIMEOUT_MILLIS, intConsumer);
     }
 
+    /**
+     * Called when the {@link VoiceInteractionService}
+     * {@link HotwordDetector#stopRecognition() requests} that hotword recognition be stopped.
+     * <p>
+     * Any open {@link android.media.AudioRecord} should be closed here.
+     */
+    public void onStopDetection() {
+    }
+
     /**
      * Callback for returning the detection result.
      *

core/java/android/service/voice/IHotwordDetectionService.aidl

@@ -53,4 +53,6 @@ oneway interface IHotwordDetectionService {
     void updateContentCaptureManager(
         in IContentCaptureManager contentCaptureManager,
         in ContentCaptureOptions options);
+
+    void stopDetection();
 }

services/voiceinteraction/java/com/android/server/voiceinteraction/HotwordDetectionConnection.java

@@ -287,6 +287,8 @@ final class HotwordDetectionConnection {
             Slog.d(TAG, "stopListening");
         }
 
+        mRemoteHotwordDetectionService.run(service -> service.stopDetection());
+
         synchronized (mLock) {
             if (mCurrentAudioSink != null) {
                 Slog.i(TAG, "Closing audio stream to hotword detector: stopping requested");