diff --git a/media/libstagefright/WVMExtractor.cpp b/media/libstagefright/WVMExtractor.cpp
index 83a1eaa..26eda0c 100644
--- a/media/libstagefright/WVMExtractor.cpp
+++ b/media/libstagefright/WVMExtractor.cpp
@@ -45,8 +45,7 @@
 static Mutex gWVMutex;
 
 WVMExtractor::WVMExtractor(const sp<DataSource> &source)
-    : mDataSource(source),
-      mUseAdaptiveStreaming(false) {
+    : mDataSource(source) {
     {
         Mutex::Autolock autoLock(gWVMutex);
         if (gVendorLibHandle == NULL) {
@@ -59,13 +58,12 @@
         }
     }
 
-    typedef MediaExtractor *(*GetInstanceFunc)(sp<DataSource>);
+    typedef WVMLoadableExtractor *(*GetInstanceFunc)(sp<DataSource>);
     GetInstanceFunc getInstanceFunc =
         (GetInstanceFunc) dlsym(gVendorLibHandle,
                 "_ZN7android11GetInstanceENS_2spINS_10DataSourceEEE");
 
     if (getInstanceFunc) {
-        LOGD("Calling GetInstanceFunc");
         mImpl = (*getInstanceFunc)(source);
         CHECK(mImpl != NULL);
     } else {
@@ -102,19 +100,17 @@
 }
 
 int64_t WVMExtractor::getCachedDurationUs(status_t *finalStatus) {
-    // TODO: Fill this with life.
+    if (mImpl == NULL) {
+        return 0;
+    }
 
-    *finalStatus = OK;
-
-    return 0;
+    return mImpl->getCachedDurationUs(finalStatus);
 }
 
 void WVMExtractor::setAdaptiveStreamingMode(bool adaptive) {
-    mUseAdaptiveStreaming = adaptive;
-}
-
-bool WVMExtractor::getAdaptiveStreamingMode() const {
-    return mUseAdaptiveStreaming;
+    if (mImpl != NULL) {
+        mImpl->setAdaptiveStreamingMode(adaptive);
+    }
 }
 
 } //namespace android
diff --git a/media/libstagefright/include/WVMExtractor.h b/media/libstagefright/include/WVMExtractor.h
index 62e5aa5..deecd25 100644
--- a/media/libstagefright/include/WVMExtractor.h
+++ b/media/libstagefright/include/WVMExtractor.h
@@ -25,6 +25,15 @@
 
 class DataSource;
 
+class WVMLoadableExtractor : public MediaExtractor {
+public:
+    WVMLoadableExtractor() {}
+    virtual ~WVMLoadableExtractor() {}
+
+    virtual int64_t getCachedDurationUs(status_t *finalStatus) = 0;
+    virtual void setAdaptiveStreamingMode(bool adaptive) = 0;
+};
+
 class WVMExtractor : public MediaExtractor {
 public:
     WVMExtractor(const sp<DataSource> &source);
@@ -49,20 +58,15 @@
     // is used.
     void setAdaptiveStreamingMode(bool adaptive);
 
-    // Retrieve the adaptive streaming mode used by the WV component.
-    bool getAdaptiveStreamingMode() const;
-
 protected:
     virtual ~WVMExtractor();
 
 private:
     sp<DataSource> mDataSource;
-    sp<MediaExtractor> mImpl;
-    bool mUseAdaptiveStreaming;
+    sp<WVMLoadableExtractor> mImpl;
 
     WVMExtractor(const WVMExtractor &);
     WVMExtractor &operator=(const WVMExtractor &);
-
 };
 
 }  // namespace android