diff --git a/media/libmedia/AudioParameter.cpp b/media/libmedia/AudioParameter.cpp
new file mode 100644
index 0000000..59ccfd0
--- /dev/null
+++ b/media/libmedia/AudioParameter.cpp
@@ -0,0 +1,179 @@
+/*
+ * Copyright (C) 2006-2011 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.
+ */
+
+#define LOG_TAG "AudioParameter"
+//#define LOG_NDEBUG 0
+
+#include <utils/Log.h>
+
+#include <media/AudioParameter.h>
+
+namespace android {
+
+const char *AudioParameter::keyRouting = "routing";
+const char *AudioParameter::keySamplingRate = "sampling_rate";
+const char *AudioParameter::keyFormat = "format";
+const char *AudioParameter::keyChannels = "channels";
+const char *AudioParameter::keyFrameCount = "frame_count";
+const char *AudioParameter::keyInputSource = "input_source";
+
+AudioParameter::AudioParameter(const String8& keyValuePairs)
+{
+    char *str = new char[keyValuePairs.length()+1];
+    mKeyValuePairs = keyValuePairs;
+
+    strcpy(str, keyValuePairs.string());
+    char *pair = strtok(str, ";");
+    while (pair != NULL) {
+        if (strlen(pair) != 0) {
+            size_t eqIdx = strcspn(pair, "=");
+            String8 key = String8(pair, eqIdx);
+            String8 value;
+            if (eqIdx == strlen(pair)) {
+                value = String8("");
+            } else {
+                value = String8(pair + eqIdx + 1);
+            }
+            if (mParameters.indexOfKey(key) < 0) {
+                mParameters.add(key, value);
+            } else {
+                mParameters.replaceValueFor(key, value);
+            }
+        } else {
+            LOGV("AudioParameter() cstor empty key value pair");
+        }
+        pair = strtok(NULL, ";");
+    }
+
+    delete[] str;
+}
+
+AudioParameter::~AudioParameter()
+{
+    mParameters.clear();
+}
+
+String8 AudioParameter::toString()
+{
+    String8 str = String8("");
+
+    size_t size = mParameters.size();
+    for (size_t i = 0; i < size; i++) {
+        str += mParameters.keyAt(i);
+        str += "=";
+        str += mParameters.valueAt(i);
+        if (i < (size - 1)) str += ";";
+    }
+    return str;
+}
+
+status_t AudioParameter::add(const String8& key, const String8& value)
+{
+    if (mParameters.indexOfKey(key) < 0) {
+        mParameters.add(key, value);
+        return NO_ERROR;
+    } else {
+        mParameters.replaceValueFor(key, value);
+        return ALREADY_EXISTS;
+    }
+}
+
+status_t AudioParameter::addInt(const String8& key, const int value)
+{
+    char str[12];
+    if (snprintf(str, 12, "%d", value) > 0) {
+        String8 str8 = String8(str);
+        return add(key, str8);
+    } else {
+        return BAD_VALUE;
+    }
+}
+
+status_t AudioParameter::addFloat(const String8& key, const float value)
+{
+    char str[23];
+    if (snprintf(str, 23, "%.10f", value) > 0) {
+        String8 str8 = String8(str);
+        return add(key, str8);
+    } else {
+        return BAD_VALUE;
+    }
+}
+
+status_t AudioParameter::remove(const String8& key)
+{
+    if (mParameters.indexOfKey(key) >= 0) {
+        mParameters.removeItem(key);
+        return NO_ERROR;
+    } else {
+        return BAD_VALUE;
+    }
+}
+
+status_t AudioParameter::get(const String8& key, String8& value)
+{
+    if (mParameters.indexOfKey(key) >= 0) {
+        value = mParameters.valueFor(key);
+        return NO_ERROR;
+    } else {
+        return BAD_VALUE;
+    }
+}
+
+status_t AudioParameter::getInt(const String8& key, int& value)
+{
+    String8 str8;
+    status_t result = get(key, str8);
+    value = 0;
+    if (result == NO_ERROR) {
+        int val;
+        if (sscanf(str8.string(), "%d", &val) == 1) {
+            value = val;
+        } else {
+            result = INVALID_OPERATION;
+        }
+    }
+    return result;
+}
+
+status_t AudioParameter::getFloat(const String8& key, float& value)
+{
+    String8 str8;
+    status_t result = get(key, str8);
+    value = 0;
+    if (result == NO_ERROR) {
+        float val;
+        if (sscanf(str8.string(), "%f", &val) == 1) {
+            value = val;
+        } else {
+            result = INVALID_OPERATION;
+        }
+    }
+    return result;
+}
+
+status_t AudioParameter::getAt(size_t index, String8& key, String8& value)
+{
+    if (mParameters.size() > index) {
+        key = mParameters.keyAt(index);
+        value = mParameters.valueAt(index);
+        return NO_ERROR;
+    } else {
+        return BAD_VALUE;
+    }
+}
+
+};  // namespace android