Don't play notifications during speech recognition

Add support for querying AudioManager to know whether speech
 recognition is currently underway.

Don't play a notification if speech recognition is underway.

Bug 7314859

Change-Id: I1bd013a3168cfe1a6b6dcfd28565e1c3c512eb6a

Author: jmtrivi

core/jni/android_media_AudioSystem.cpp

@@ -75,6 +75,14 @@ android_media_AudioSystem_isStreamActive(JNIEnv *env, jobject thiz, jint stream,
     return state;
 }
 
+static jboolean
+android_media_AudioSystem_isSourceActive(JNIEnv *env, jobject thiz, jint source)
+{
+    bool state = false;
+    AudioSystem::isSourceActive((audio_source_t) source, &state);
+    return state;
+}
+
 static int
 android_media_AudioSystem_setParameters(JNIEnv *env, jobject thiz, jstring keyValuePairs)
 {
@@ -261,7 +269,8 @@ static JNINativeMethod gMethods[] = {
     {"getParameters",        "(Ljava/lang/String;)Ljava/lang/String;", (void *)android_media_AudioSystem_getParameters},
     {"muteMicrophone",      "(Z)I",     (void *)android_media_AudioSystem_muteMicrophone},
     {"isMicrophoneMuted",   "()Z",      (void *)android_media_AudioSystem_isMicrophoneMuted},
-    {"isStreamActive",      "(II)Z",     (void *)android_media_AudioSystem_isStreamActive},
+    {"isStreamActive",      "(II)Z",    (void *)android_media_AudioSystem_isStreamActive},
+    {"isSourceActive",      "(I)Z",     (void *)android_media_AudioSystem_isSourceActive},
     {"setDeviceConnectionState", "(IILjava/lang/String;)I", (void *)android_media_AudioSystem_setDeviceConnectionState},
     {"getDeviceConnectionState", "(ILjava/lang/String;)I",  (void *)android_media_AudioSystem_getDeviceConnectionState},
     {"setPhoneState",       "(I)I",     (void *)android_media_AudioSystem_setPhoneState},

media/java/android/media/AudioManager.java

@@ -1524,6 +1524,16 @@ public boolean isMusicActive() {
         return AudioSystem.isStreamActive(STREAM_MUSIC, 0);
     }
 
+    /**
+     * @hide
+     * Checks whether speech recognition is active
+     * @return true if a recording with source {@link MediaRecorder.AudioSource#VOICE_RECOGNITION}
+     *    is underway.
+     */
+    public boolean isSpeechRecognitionActive() {
+        return AudioSystem.isSourceActive(MediaRecorder.AudioSource.VOICE_RECOGNITION);
+    }
+
     /**
      * @hide
      * If the stream is active locally or remotely, adjust its volume according to the enforced

media/java/android/media/AudioSystem.java

@@ -110,6 +110,13 @@ public class AudioSystem
      */
     public static native boolean isStreamActive(int stream, int inPastMs);
 
+    /*
+     * Checks whether the specified audio source is active.
+     *
+     * return true if any recorder using this source is currently recording
+     */
+    public static native boolean isSourceActive(int source);
+
     /*
      * Sets a group generic audio configuration parameters. The use of these parameters
      * are platform dependent, see libaudio

services/java/com/android/server/NotificationManagerService.java

@@ -1066,8 +1066,9 @@ public void enqueueNotificationInternal(String pkg, int callingUid, int callingP
                     }
                     mSoundNotification = r;
                     // do not play notifications if stream volume is 0
-                    // (typically because ringer mode is silent).
-                    if (audioManager.getStreamVolume(audioStreamType) != 0) {
+                    // (typically because ringer mode is silent) or if speech recognition is active.
+                    if ((audioManager.getStreamVolume(audioStreamType) != 0)
+                            && !audioManager.isSpeechRecognitionActive()) {
                         final long identity = Binder.clearCallingIdentity();
                         try {
                             final IRingtonePlayer player = mAudioService.getRingtonePlayer();