diff --git a/include/media/AudioSystem.h b/include/media/AudioSystem.h
index 1e29d82..03f8944 100644
--- a/include/media/AudioSystem.h
+++ b/include/media/AudioSystem.h
@@ -204,8 +204,9 @@
     // set audio mode in audio hardware (see AudioSystem::audio_mode)
     static status_t setMode(int mode);
 
-    // returns true in *state if tracks are active on the specified stream
-    static status_t isStreamActive(int stream, bool *state);
+    // returns true in *state if tracks are active on the specified stream or has been active
+    // in the past inPastMs milliseconds
+    static status_t isStreamActive(int stream, bool *state, uint32_t inPastMs = 0);
 
     // set/get audio hardware parameters. The function accepts a list of parameters
     // key value pairs in the form: key1=value1;key2=value2;...
diff --git a/include/media/IAudioFlinger.h b/include/media/IAudioFlinger.h
index 70e505e..589f7cd 100644
--- a/include/media/IAudioFlinger.h
+++ b/include/media/IAudioFlinger.h
@@ -102,9 +102,6 @@
     virtual     status_t    setMicMute(bool state) = 0;
     virtual     bool        getMicMute() const = 0;
 
-    // is any track active on this stream?
-    virtual     bool        isStreamActive(int stream) const = 0;
-
     virtual     status_t    setParameters(int ioHandle, const String8& keyValuePairs) = 0;
     virtual     String8     getParameters(int ioHandle, const String8& keys) = 0;
 
diff --git a/include/media/IAudioPolicyService.h b/include/media/IAudioPolicyService.h
index 49eee59..5afceaa 100644
--- a/include/media/IAudioPolicyService.h
+++ b/include/media/IAudioPolicyService.h
@@ -81,6 +81,7 @@
                                     int session,
                                     int id) = 0;
     virtual status_t unregisterEffect(int id) = 0;
+    virtual bool     isStreamActive(int stream, uint32_t inPastMs = 0) const = 0;
 };