diff --git a/camera/CameraMetadata.cpp b/camera/CameraMetadata.cpp
new file mode 100644
index 0000000..0bfa420
--- /dev/null
+++ b/camera/CameraMetadata.cpp
@@ -0,0 +1,298 @@
+/*
+ * Copyright (C) 2012 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 "Camera2-Metadata"
+#include <utils/Log.h>
+#include <utils/Errors.h>
+
+#include <camera/CameraMetadata.h>
+
+namespace android {
+
+CameraMetadata::CameraMetadata() :
+        mBuffer(NULL) {
+}
+
+CameraMetadata::CameraMetadata(size_t entryCapacity, size_t dataCapacity)
+{
+    mBuffer = allocate_camera_metadata(entryCapacity, dataCapacity);
+}
+
+CameraMetadata::CameraMetadata(const CameraMetadata &other) {
+    mBuffer = clone_camera_metadata(other.mBuffer);
+}
+
+CameraMetadata::CameraMetadata(camera_metadata_t *buffer) : mBuffer(NULL) {
+    acquire(buffer);
+}
+
+CameraMetadata &CameraMetadata::operator=(const CameraMetadata &other) {
+    return operator=(other.mBuffer);
+}
+
+CameraMetadata &CameraMetadata::operator=(const camera_metadata_t *buffer) {
+    if (CC_LIKELY(buffer != mBuffer)) {
+        camera_metadata_t *newBuffer = clone_camera_metadata(buffer);
+        clear();
+        mBuffer = newBuffer;
+    }
+    return *this;
+}
+
+CameraMetadata::~CameraMetadata() {
+    clear();
+}
+
+camera_metadata_t* CameraMetadata::release() {
+    camera_metadata_t *released = mBuffer;
+    mBuffer = NULL;
+    return released;
+}
+
+void CameraMetadata::clear() {
+    if (mBuffer) {
+        free_camera_metadata(mBuffer);
+        mBuffer = NULL;
+    }
+}
+
+void CameraMetadata::acquire(camera_metadata_t *buffer) {
+    clear();
+    mBuffer = buffer;
+}
+
+void CameraMetadata::acquire(CameraMetadata &other) {
+    acquire(other.release());
+}
+
+status_t CameraMetadata::append(const CameraMetadata &other) {
+    return append_camera_metadata(mBuffer, other.mBuffer);
+}
+
+size_t CameraMetadata::entryCount() const {
+    return (mBuffer == NULL) ? 0 :
+            get_camera_metadata_entry_count(mBuffer);
+}
+
+bool CameraMetadata::isEmpty() const {
+    return entryCount() == 0;
+}
+
+status_t CameraMetadata::sort() {
+    return sort_camera_metadata(mBuffer);
+}
+
+status_t CameraMetadata::checkType(uint32_t tag, uint8_t expectedType) {
+    int tagType = get_camera_metadata_tag_type(tag);
+    if ( CC_UNLIKELY(tagType == -1)) {
+        ALOGE("Update metadata entry: Unknown tag %d", tag);
+        return INVALID_OPERATION;
+    }
+    if ( CC_UNLIKELY(tagType != expectedType) ) {
+        ALOGE("Mismatched tag type when updating entry %s (%d) of type %s; "
+                "got type %s data instead ",
+                get_camera_metadata_tag_name(tag), tag,
+                camera_metadata_type_names[tagType],
+                camera_metadata_type_names[expectedType]);
+        return INVALID_OPERATION;
+    }
+    return OK;
+}
+
+status_t CameraMetadata::update(uint32_t tag,
+        const int32_t *data, size_t data_count) {
+    status_t res;
+    if ( (res = checkType(tag, TYPE_INT32)) != OK) {
+        return res;
+    }
+    return update(tag, (const void*)data, data_count);
+}
+
+status_t CameraMetadata::update(uint32_t tag,
+        const uint8_t *data, size_t data_count) {
+    status_t res;
+    if ( (res = checkType(tag, TYPE_BYTE)) != OK) {
+        return res;
+    }
+    return update(tag, (const void*)data, data_count);
+}
+
+status_t CameraMetadata::update(uint32_t tag,
+        const float *data, size_t data_count) {
+    status_t res;
+    if ( (res = checkType(tag, TYPE_FLOAT)) != OK) {
+        return res;
+    }
+    return update(tag, (const void*)data, data_count);
+}
+
+status_t CameraMetadata::update(uint32_t tag,
+        const int64_t *data, size_t data_count) {
+    status_t res;
+    if ( (res = checkType(tag, TYPE_INT64)) != OK) {
+        return res;
+    }
+    return update(tag, (const void*)data, data_count);
+}
+
+status_t CameraMetadata::update(uint32_t tag,
+        const double *data, size_t data_count) {
+    status_t res;
+    if ( (res = checkType(tag, TYPE_DOUBLE)) != OK) {
+        return res;
+    }
+    return update(tag, (const void*)data, data_count);
+}
+
+status_t CameraMetadata::update(uint32_t tag,
+        const camera_metadata_rational_t *data, size_t data_count) {
+    status_t res;
+    if ( (res = checkType(tag, TYPE_RATIONAL)) != OK) {
+        return res;
+    }
+    return update(tag, (const void*)data, data_count);
+}
+
+status_t CameraMetadata::update(uint32_t tag,
+        const String8 &string) {
+    status_t res;
+    if ( (res = checkType(tag, TYPE_BYTE)) != OK) {
+        return res;
+    }
+    return update(tag, (const void*)string.string(), string.size());
+}
+
+status_t CameraMetadata::update(uint32_t tag, const void *data,
+        size_t data_count) {
+    status_t res;
+    int type = get_camera_metadata_tag_type(tag);
+    if (type == -1) {
+        ALOGE("%s: Tag %d not found", __FUNCTION__, tag);
+        return BAD_VALUE;
+    }
+    size_t data_size = calculate_camera_metadata_entry_data_size(type,
+            data_count);
+
+    res = resizeIfNeeded(1, data_size);
+
+    if (res == OK) {
+        camera_metadata_entry_t entry;
+        res = find_camera_metadata_entry(mBuffer, tag, &entry);
+        if (res == NAME_NOT_FOUND) {
+            res = add_camera_metadata_entry(mBuffer,
+                    tag, data, data_count);
+        } else if (res == OK) {
+            res = update_camera_metadata_entry(mBuffer,
+                    entry.index, data, data_count, NULL);
+        }
+    }
+
+    if (res != OK) {
+        ALOGE("%s: Unable to update metadata entry %s.%s (%x): %s (%d)",
+                __FUNCTION__, get_camera_metadata_section_name(tag),
+                get_camera_metadata_tag_name(tag), tag, strerror(-res), res);
+    }
+    return res;
+}
+
+camera_metadata_entry_t CameraMetadata::find(uint32_t tag) {
+    status_t res;
+    camera_metadata_entry entry;
+    res = find_camera_metadata_entry(mBuffer, tag, &entry);
+    if (CC_UNLIKELY( res != OK )) {
+        entry.count = 0;
+        entry.data.u8 = NULL;
+    }
+    return entry;
+}
+
+camera_metadata_ro_entry_t CameraMetadata::find(uint32_t tag) const {
+    status_t res;
+    camera_metadata_ro_entry entry;
+    res = find_camera_metadata_ro_entry(mBuffer, tag, &entry);
+    if (CC_UNLIKELY( res != OK )) {
+        entry.count = 0;
+        entry.data.u8 = NULL;
+    }
+    return entry;
+}
+
+status_t CameraMetadata::erase(uint32_t tag) {
+    camera_metadata_entry_t entry;
+    status_t res;
+    res = find_camera_metadata_entry(mBuffer, tag, &entry);
+    if (res == NAME_NOT_FOUND) {
+        return OK;
+    } else if (res != OK) {
+        ALOGE("%s: Error looking for entry %s.%s (%x): %s %d",
+                __FUNCTION__,
+                get_camera_metadata_section_name(tag),
+                get_camera_metadata_tag_name(tag), tag, strerror(-res), res);
+        return res;
+    }
+    res = delete_camera_metadata_entry(mBuffer, entry.index);
+    if (res != OK) {
+        ALOGE("%s: Error deleting entry %s.%s (%x): %s %d",
+                __FUNCTION__,
+                get_camera_metadata_section_name(tag),
+                get_camera_metadata_tag_name(tag), tag, strerror(-res), res);
+    }
+    return res;
+}
+
+void CameraMetadata::dump(int fd, int verbosity, int indentation) const {
+    dump_indented_camera_metadata(mBuffer, fd, verbosity, indentation);
+}
+
+status_t CameraMetadata::resizeIfNeeded(size_t extraEntries, size_t extraData) {
+    if (mBuffer == NULL) {
+        mBuffer = allocate_camera_metadata(extraEntries * 2, extraData * 2);
+        if (mBuffer == NULL) {
+            ALOGE("%s: Can't allocate larger metadata buffer", __FUNCTION__);
+            return NO_MEMORY;
+        }
+    } else {
+        size_t currentEntryCount = get_camera_metadata_entry_count(mBuffer);
+        size_t currentEntryCap = get_camera_metadata_entry_capacity(mBuffer);
+        size_t newEntryCount = currentEntryCount +
+                extraEntries;
+        newEntryCount = (newEntryCount > currentEntryCap) ?
+                newEntryCount * 2 : currentEntryCap;
+
+        size_t currentDataCount = get_camera_metadata_data_count(mBuffer);
+        size_t currentDataCap = get_camera_metadata_data_capacity(mBuffer);
+        size_t newDataCount = currentDataCount +
+                extraData;
+        newDataCount = (newDataCount > currentDataCap) ?
+                newDataCount * 2 : currentDataCap;
+
+        if (newEntryCount > currentEntryCap ||
+                newDataCount > currentDataCap) {
+            camera_metadata_t *oldBuffer = mBuffer;
+            mBuffer = allocate_camera_metadata(newEntryCount,
+                    newDataCount);
+            if (mBuffer == NULL) {
+                ALOGE("%s: Can't allocate larger metadata buffer", __FUNCTION__);
+                return NO_MEMORY;
+            }
+            append_camera_metadata(mBuffer, oldBuffer);
+            free_camera_metadata(oldBuffer);
+        }
+    }
+    return OK;
+}
+
+}; // namespace android