am f5e63398: am 65b351c9: am 5a5e2f41: am 1c4eddb1: Merge "Fix div zero error in corrupted media file"

* commit 'f5e633989263f03c469d676246fbf003f3bb1acc':
  Fix div zero error in corrupted media file

1 files changed, 10 insertions, 0 deletions

diff --git a/media/libstagefright/MPEG4Extractor.cpp b/media/libstagefright/MPEG4Extractor.cpp
index d0f42cc..910ae32 100644
--- a/media/libstagefright/MPEG4Extractor.cpp
+++ b/media/libstagefright/MPEG4Extractor.cpp
@@ -1168,6 +1168,11 @@ status_t MPEG4Extractor::parseChunk(off64_t *offset, int depth) {
                 return ERROR_IO;
             }
 
+            if (!timescale) {
+                ALOGE("timescale should not be ZERO.");
+                return ERROR_MALFORMED;
+            }
+
             mLastTrack->timescale = ntohl(timescale);
 
             // 14496-12 says all ones means indeterminate, but some files seem to use
@@ -2635,6 +2640,11 @@ status_t MPEG4Extractor::verifyTrack(Track *track) {
         return ERROR_MALFORMED;
     }
 
+    if (track->timescale == 0) {
+        ALOGE("timescale invalid.");
+        return ERROR_MALFORMED;
+    }
+
     return OK;
 }