diff --git a/media/libaudiofoundation/AudioContainers.cpp b/media/libaudiofoundation/AudioContainers.cpp
new file mode 100644
index 0000000..adc5d40
--- /dev/null
+++ b/media/libaudiofoundation/AudioContainers.cpp
@@ -0,0 +1,86 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <sstream>
+#include <string>
+
+#include <media/AudioContainers.h>
+
+namespace android {
+
+const DeviceTypeSet& getAudioDeviceOutAllSet() {
+    static const DeviceTypeSet audioDeviceOutAllSet = DeviceTypeSet(
+            std::begin(AUDIO_DEVICE_OUT_ALL_ARRAY),
+            std::end(AUDIO_DEVICE_OUT_ALL_ARRAY));
+    return audioDeviceOutAllSet;
+}
+
+const DeviceTypeSet& getAudioDeviceOutAllA2dpSet() {
+    static const DeviceTypeSet audioDeviceOutAllA2dpSet = DeviceTypeSet(
+            std::begin(AUDIO_DEVICE_OUT_ALL_A2DP_ARRAY),
+            std::end(AUDIO_DEVICE_OUT_ALL_A2DP_ARRAY));
+    return audioDeviceOutAllA2dpSet;
+}
+
+const DeviceTypeSet& getAudioDeviceOutAllScoSet() {
+    static const DeviceTypeSet audioDeviceOutAllScoSet = DeviceTypeSet(
+            std::begin(AUDIO_DEVICE_OUT_ALL_SCO_ARRAY),
+            std::end(AUDIO_DEVICE_OUT_ALL_SCO_ARRAY));
+    return audioDeviceOutAllScoSet;
+}
+
+const DeviceTypeSet& getAudioDeviceInAllSet() {
+    static const DeviceTypeSet audioDeviceInAllSet = DeviceTypeSet(
+            std::begin(AUDIO_DEVICE_IN_ALL_ARRAY),
+            std::end(AUDIO_DEVICE_IN_ALL_ARRAY));
+    return audioDeviceInAllSet;
+}
+
+bool deviceTypesToString(const DeviceTypeSet &deviceTypes, std::string &str) {
+    bool ret = true;
+    for (auto it = deviceTypes.begin(); it != deviceTypes.end();) {
+        std::string deviceTypeStr;
+        ret = audio_is_output_device(*it) ?
+              OutputDeviceConverter::toString(*it, deviceTypeStr) :
+              InputDeviceConverter::toString(*it, deviceTypeStr);
+        if (!ret) {
+            break;
+        }
+        str.append(deviceTypeStr);
+        if (++it != deviceTypes.end()) {
+            str.append(" , ");
+        }
+    }
+    if (!ret) {
+        str = "Unknown values";
+    }
+    return ret;
+}
+
+std::string dumpDeviceTypes(const DeviceTypeSet &deviceTypes) {
+    std::string ret;
+    for (auto it = deviceTypes.begin(); it != deviceTypes.end();) {
+        std::stringstream ss;
+        ss << "0x" << std::hex << (*it);
+        ret.append(ss.str());
+        if (++it != deviceTypes.end()) {
+            ret.append(" , ");
+        }
+    }
+    return ret;
+}
+
+} // namespace android