Merge "Fix mic enumeration CTS fail on marlin." into pi-dev
diff --git a/media/java/android/media/AudioManager.java b/media/java/android/media/AudioManager.java
index aeef215..fdb7499 100644
--- a/media/java/android/media/AudioManager.java
+++ b/media/java/android/media/AudioManager.java
@@ -63,6 +63,7 @@
 import java.lang.annotation.RetentionPolicy;
 import java.util.ArrayList;
 import java.util.HashMap;
+import java.util.HashSet;
 import java.util.Iterator;
 import java.util.List;
 import java.util.concurrent.ConcurrentHashMap;
@@ -4786,6 +4787,21 @@
     }
 
     /**
+     * Add {@link MicrophoneInfo} by device information while filtering certain types.
+     */
+    private void addMicrophonesFromAudioDeviceInfo(ArrayList<MicrophoneInfo> microphones,
+                    HashSet<Integer> filterTypes) {
+        AudioDeviceInfo[] devices = getDevicesStatic(GET_DEVICES_INPUTS);
+        for (AudioDeviceInfo device : devices) {
+            if (filterTypes.contains(device.getType())) {
+                continue;
+            }
+            MicrophoneInfo microphone = microphoneInfoFromAudioDeviceInfo(device);
+            microphones.add(microphone);
+        }
+    }
+
+    /**
      * Returns a list of {@link MicrophoneInfo} that corresponds to the characteristics
      * of all available microphones. The list is empty when no microphones are available
      * on the device. An error during the query will result in an IOException being thrown.
@@ -4796,21 +4812,17 @@
     public List<MicrophoneInfo> getMicrophones() throws IOException {
         ArrayList<MicrophoneInfo> microphones = new ArrayList<MicrophoneInfo>();
         int status = AudioSystem.getMicrophones(microphones);
+        HashSet<Integer> filterTypes = new HashSet<>();
+        filterTypes.add(AudioDeviceInfo.TYPE_TELEPHONY);
         if (status != AudioManager.SUCCESS) {
-            // fail and bail!
+            // fail and populate microphones with unknown characteristics by device information.
             Log.e(TAG, "getMicrophones failed:" + status);
-            return new ArrayList<MicrophoneInfo>(); // Always return a list.
+            addMicrophonesFromAudioDeviceInfo(microphones, filterTypes);
+            return microphones;
         }
         setPortIdForMicrophones(microphones);
-        AudioDeviceInfo[] devices = getDevicesStatic(GET_DEVICES_INPUTS);
-        for (AudioDeviceInfo device : devices) {
-            if (device.getType() == AudioDeviceInfo.TYPE_BUILTIN_MIC ||
-                    device.getType() == AudioDeviceInfo.TYPE_TELEPHONY) {
-                continue;
-            }
-            MicrophoneInfo microphone = microphoneInfoFromAudioDeviceInfo(device);
-            microphones.add(microphone);
-        }
+        filterTypes.add(AudioDeviceInfo.TYPE_BUILTIN_MIC);
+        addMicrophonesFromAudioDeviceInfo(microphones, filterTypes);
         return microphones;
     }
 
diff --git a/media/java/android/media/AudioRecord.java b/media/java/android/media/AudioRecord.java
index 4f0dccb..6b35dd4 100644
--- a/media/java/android/media/AudioRecord.java
+++ b/media/java/android/media/AudioRecord.java
@@ -1628,7 +1628,6 @@
         int status = native_get_active_microphones(activeMicrophones);
         if (status != AudioManager.SUCCESS) {
             Log.e(TAG, "getActiveMicrophones failed:" + status);
-            return new ArrayList<MicrophoneInfo>();
         }
         AudioManager.setPortIdForMicrophones(activeMicrophones);
 
diff --git a/media/java/android/media/MediaRecorder.java b/media/java/android/media/MediaRecorder.java
index 90b6bff..82d64f3 100644
--- a/media/java/android/media/MediaRecorder.java
+++ b/media/java/android/media/MediaRecorder.java
@@ -1434,7 +1434,6 @@
         int status = native_getActiveMicrophones(activeMicrophones);
         if (status != AudioManager.SUCCESS) {
             Log.e(TAG, "getActiveMicrophones failed:" + status);
-            return new ArrayList<MicrophoneInfo>();
         }
         AudioManager.setPortIdForMicrophones(activeMicrophones);