diff --git a/services/audioflinger/PropertyUtils.cpp b/services/audioflinger/PropertyUtils.cpp
new file mode 100644
index 0000000..b8abb8e
--- /dev/null
+++ b/services/audioflinger/PropertyUtils.cpp
@@ -0,0 +1,77 @@
+/*
+ * Copyright (C) 2021 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 <aaudio/AAudio.h>
+#include <aaudio/AAudioTesting.h>
+#include <android/media/AudioMMapPolicy.h>
+#include <cutils/properties.h>
+
+#include "PropertyUtils.h"
+
+namespace android {
+
+std::string getMmapPolicyProperty(media::AudioMMapPolicyType policyType) {
+    switch (policyType) {
+        case media::AudioMMapPolicyType::DEFAULT:
+            return "aaudio.mmap_policy";
+        case media::AudioMMapPolicyType::EXCLUSIVE:
+            return "aaudio.mmap_exclusive_policy";
+        default:
+            return "";
+    }
+}
+
+int getDefaultPolicyFromType(media::AudioMMapPolicyType policyType) {
+    switch (policyType) {
+        case media::AudioMMapPolicyType::EXCLUSIVE:
+            return AAUDIO_UNSPECIFIED;
+        case media::AudioMMapPolicyType::DEFAULT:
+        default:
+            return AAUDIO_POLICY_NEVER;
+    }
+}
+
+media::AudioMMapPolicy legacy2aidl_aaudio_policy_t_AudioMMapPolicy(aaudio_policy_t legacy) {
+    switch (legacy) {
+        case AAUDIO_POLICY_NEVER:
+            return media::AudioMMapPolicy::NEVER;
+        case AAUDIO_POLICY_AUTO:
+            return media::AudioMMapPolicy::AUTO;
+        case AAUDIO_POLICY_ALWAYS:
+            return media::AudioMMapPolicy::ALWAYS;
+        case AAUDIO_UNSPECIFIED:
+            return media::AudioMMapPolicy::UNSPECIFIED;
+        default:
+            ALOGE("%s unknown aaudio policy: %d", __func__, legacy);
+            return media::AudioMMapPolicy::UNSPECIFIED;
+    }
+}
+
+status_t getMmapPolicyInfosFromSystemProperty(
+        media::AudioMMapPolicyType policyType,
+        std::vector<media::AudioMMapPolicyInfo> *policyInfos) {
+    media::AudioMMapPolicyInfo policyInfo;
+    const std::string propertyStr = getMmapPolicyProperty(policyType);
+    if (propertyStr.empty()) {
+        return BAD_VALUE;
+    }
+    policyInfo.mmapPolicy = legacy2aidl_aaudio_policy_t_AudioMMapPolicy(
+            property_get_int32(propertyStr.c_str(), getDefaultPolicyFromType(policyType)));
+    policyInfos->push_back(policyInfo);
+    return NO_ERROR;
+}
+
+} // namespace android