Partial fix for 4181654 hang in seeking after seeking to the end

Also prevents player from becoming unresponsive as described in 3510047.

Change-Id: I3350990c46641e48c34e9a64598157c8af77dcc5

proprietary/wvm/WVMMediaSource.cpp

@@ -195,6 +195,7 @@ status_t WVMMediaSource::read(MediaBuffer **buffer, const ReadOptions *options)
     int64_t keyTime;
 
     bool syncFrame;
+    int retryLimit = 0;
 
     // Pull full access units. Since we aren't sure how big they might be,
     // start with initial buffer size, then allocate a larger buffer if we
@@ -233,9 +234,16 @@ status_t WVMMediaSource::read(MediaBuffer **buffer, const ReadOptions *options)
         }
 
         if (bytesRead == 0) {
-            // Didn't get anything, sleep a bit so we don't hog the CPU then try again
-            usleep(10000);
-            continue;
+            if (retryLimit++ >= 500) {
+                // If no data received within the retry limit, return ERROR_IO
+                // This prevents the player from becoming unresponsive
+                mediaBuf->release();
+                return ERROR_IO;
+            } else {
+                // Didn't get anything, sleep a bit so we don't hog the CPU then try again
+                usleep(10000);
+                continue;
+            }
         }
 
 #define PCR_HZ 90000