diff --git a/services/audioflinger/Threads.cpp b/services/audioflinger/Threads.cpp
index 7bfe802..f8fa094 100644
--- a/services/audioflinger/Threads.cpp
+++ b/services/audioflinger/Threads.cpp
@@ -7042,6 +7042,49 @@
 #endif
 }
 
+status_t AudioFlinger::RecordThread::getActiveMicrophones(
+        std::vector<media::MicrophoneInfo>* activeMicrophones)
+{
+    ALOGV("RecordThread::getActiveMicrophones");
+    AutoMutex _l(mLock);
+    // Fake data
+    struct audio_microphone_characteristic_t characteristic;
+    sprintf(characteristic.device_id, "builtin_mic");
+    characteristic.type = AUDIO_DEVICE_IN_BUILTIN_MIC;
+    sprintf(characteristic.address, "");
+    characteristic.location = AUDIO_MICROPHONE_LOCATION_MAINBODY;
+    characteristic.group = 0;
+    characteristic.index_in_the_group = 0;
+    characteristic.sensitivity = 1.0f;
+    characteristic.max_spl = 100.0f;
+    characteristic.min_spl = 0.0f;
+    characteristic.directionality = AUDIO_MICROPHONE_DIRECTIONALITY_OMNI;
+    characteristic.num_frequency_responses = 5;
+    for (size_t i = 0; i < characteristic.num_frequency_responses; i++) {
+        characteristic.frequency_responses[0][i] = 100.0f - i;
+        characteristic.frequency_responses[1][i] = 100.0f + i;
+    }
+    for (size_t i = 0; i < AUDIO_CHANNEL_COUNT_MAX; i++) {
+        characteristic.channel_mapping[i] = AUDIO_MICROPHONE_CHANNEL_MAPPING_UNUSED;
+    }
+    audio_microphone_channel_mapping_t channel_mappings[] = {
+        AUDIO_MICROPHONE_CHANNEL_MAPPING_DIRECT,
+        AUDIO_MICROPHONE_CHANNEL_MAPPING_PROCESSED,
+    };
+    for (size_t i = 0; i < mChannelCount; i++) {
+        characteristic.channel_mapping[i] = channel_mappings[i % 2];
+    }
+    characteristic.geometric_location.x = 0.1f;
+    characteristic.geometric_location.y = 0.2f;
+    characteristic.geometric_location.z = 0.3f;
+    characteristic.orientation.x = 0.0f;
+    characteristic.orientation.y = 1.0f;
+    characteristic.orientation.z = 0.0f;
+    media::MicrophoneInfo microphoneInfo = media::MicrophoneInfo(characteristic);
+    activeMicrophones->push_back(microphoneInfo);
+    return NO_ERROR;
+}
+
 // destroyTrack_l() must be called with ThreadBase::mLock held
 void AudioFlinger::RecordThread::destroyTrack_l(const sp<RecordTrack>& track)
 {