Fix for b/4198446 HC - Support for Widevine Adaptive VOD

Fix for b/4075745 libWVStreamControlAPI crashes when dlopened() and dlclosed()
Added error logging to diagnose problems such as b/4430078 Playback of newly rented
    movie fails with "license expired"

Includes Widevine library build Version 4.5.0.3682

Change-Id: I5708bb3fb92f05a3dd1768620157a795ccebd57a

proprietary/wvm/include/WVMExtractorImpl.h

@@ -21,7 +21,7 @@
 #include "AndroidConfig.h"
 #include "WVStreamControlAPI.h"
 #include "WVMInfoListener.h"
-#include <media/stagefright/MediaExtractor.h>
+#include "WVMExtractor.h"
 #include <media/stagefright/DataSource.h>
 #include <utils/RefBase.h>
 
@@ -30,13 +30,13 @@
 
 namespace android {
 
-MediaExtractor *GetInstance(sp<DataSource> dataSource);
+WVMLoadableExtractor *GetInstance(sp<DataSource> dataSource);
 
 
 class WVMMediaSource;
 class WVMFileSource;
 
-class WVMExtractorImpl : public MediaExtractor {
+class WVMExtractorImpl : public WVMLoadableExtractor {
 public:
     WVMExtractorImpl(sp<DataSource> dataSource);
 
@@ -45,9 +45,13 @@ public:
     virtual sp<MetaData> getTrackMetaData(size_t index, uint32_t flags);
 
     virtual sp<MetaData> getMetaData();
+    virtual int64_t getCachedDurationUs(status_t *finalStatus);
+    virtual void setAdaptiveStreamingMode(bool adaptive);
+    bool getAdaptiveStreamingMode() const;
 
 protected:
     virtual ~WVMExtractorImpl();
+    void Initialize();
 
 private:
     status_t readAVCCMetaData(sp<MetaData> videoMetaData);
@@ -61,6 +65,9 @@ private:
     sp<WVMInfoListener> mInfoListener;
 
     bool mHaveMetaData;
+    bool mUseAdaptiveStreaming;
+    bool mIsLiveStream;
+    bool mAdaptivePrefetching;
 
     WVSession *mSession;