diff --git a/media/libaudioclient/IAudioFlinger.cpp b/media/libaudioclient/IAudioFlinger.cpp
index ae9c96f..b6c98cc 100644
--- a/media/libaudioclient/IAudioFlinger.cpp
+++ b/media/libaudioclient/IAudioFlinger.cpp
@@ -85,6 +85,7 @@
     GET_AUDIO_HW_SYNC_FOR_SESSION,
     SYSTEM_READY,
     FRAME_COUNT_HAL,
+    LIST_MICROPHONES,
 };
 
 #define MAX_ITEMS_PER_LIST 1024
@@ -842,6 +843,18 @@
         }
         return reply.readInt64();
     }
+    virtual status_t getMicrophones(std::vector<media::MicrophoneInfo> *microphones)
+    {
+        Parcel data, reply;
+        data.writeInterfaceToken(IAudioFlinger::getInterfaceDescriptor());
+        status_t status = remote()->transact(LIST_MICROPHONES, data, &reply);
+        if (status != NO_ERROR ||
+                (status = (status_t)reply.readInt32()) != NO_ERROR) {
+            return status;
+        }
+        status = reply.readParcelableVector(microphones);
+        return status;
+    }
 };
 
 IMPLEMENT_META_INTERFACE(AudioFlinger, "android.media.IAudioFlinger");
@@ -1407,6 +1420,16 @@
             reply->writeInt64( frameCountHAL((audio_io_handle_t) data.readInt32()) );
             return NO_ERROR;
         } break;
+        case LIST_MICROPHONES: {
+            CHECK_INTERFACE(IAudioFlinger, data, reply);
+            std::vector<media::MicrophoneInfo> microphones;
+            status_t status = getMicrophones(&microphones);
+            reply->writeInt32(status);
+            if (status == NO_ERROR) {
+                reply->writeParcelableVector(microphones);
+            }
+            return NO_ERROR;
+        }
         default:
             return BBinder::onTransact(code, data, reply, flags);
     }