diff --git a/include/camera/CameraMetadata.h b/include/camera/CameraMetadata.h
index 28f47a1..d284477 100644
--- a/include/camera/CameraMetadata.h
+++ b/include/camera/CameraMetadata.h
@@ -18,12 +18,15 @@
 #define ANDROID_CLIENT_CAMERA2_CAMERAMETADATA_CPP
 
 #include "system/camera_metadata.h"
+
 #include <utils/String8.h>
 #include <utils/Vector.h>
 #include <binder/Parcelable.h>
 
 namespace android {
 
+class VendorTagDescriptor;
+
 /**
  * A convenience wrapper around the C-based camera_metadata_t library.
  */
@@ -137,6 +140,8 @@
             const camera_metadata_rational_t *data, size_t data_count);
     status_t update(uint32_t tag,
             const String8 &string);
+    status_t update(const camera_metadata_ro_entry &entry);
+
 
     template<typename T>
     status_t update(uint32_t tag, Vector<T> data) {
@@ -206,6 +211,15 @@
     static status_t writeToParcel(Parcel &parcel,
                                   const camera_metadata_t* metadata);
 
+    /**
+     * Find tag id for a given tag name, also checking vendor tags if available.
+     * On success, returns OK and writes the tag id into tag.
+     *
+     * This is a slow method.
+     */
+    static status_t getTagFromName(const char *name,
+            const VendorTagDescriptor* vTags, uint32_t *tag);
+
   private:
     camera_metadata_t *mBuffer;
     mutable bool       mLocked;
diff --git a/include/camera/VendorTagDescriptor.h b/include/camera/VendorTagDescriptor.h
index 4c1cab6..60e2d2d 100644
--- a/include/camera/VendorTagDescriptor.h
+++ b/include/camera/VendorTagDescriptor.h
@@ -81,8 +81,10 @@
         /**
          * Convenience method to get a vector containing all vendor tag
          * sections, or an empty vector if none are defined.
+         * The pointer is valid for the lifetime of the VendorTagDescriptor,
+         * or until readParcel or copyFrom is invoked.
          */
-        SortedVector<String8> getAllSectionNames() const;
+        const SortedVector<String8>* getAllSectionNames() const;
 
         /**
          * Lookup the tag id for a given tag name and section.