some fixes for crash when extractor creation fails

- prefetch data for sniffing

- notify error instead of crashing if extractor is NULL

Bug: 16818302

Change-Id: I56ff4996d99ac2811d19d141f7ff7acdd7c1da17

1 files changed, 2 insertions, 0 deletions

diff --git a/include/media/stagefright/MediaExtractor.h b/include/media/stagefright/MediaExtractor.h
index 3076a96..183933a 100644
--- a/include/media/stagefright/MediaExtractor.h
+++ b/include/media/stagefright/MediaExtractor.h
@@ -65,6 +65,8 @@ public:
     virtual char* getDrmTrackInfo(size_t trackID, int *len) {
         return NULL;
     }
+    virtual void setUID(uid_t uid) {
+    }
 
 protected:
     MediaExtractor() : mIsDrm(false) {}