libwebm: set version to v1.0.0.19

Change-Id: I5e88dce1c52bc18bdab2063111830b5fbd0faafe

mkvparser.cpp

@@ -21,7 +21,7 @@ void mkvparser::GetVersion(int& major, int& minor, int& build, int& revision)
     major = 1;
     minor = 0;
     build = 0;
-    revision = 18;
+    revision = 19;
 }
 
 long long mkvparser::ReadUInt(IMkvReader* pReader, long long pos, long& len)
@@ -6494,7 +6494,16 @@ long Cluster::ParseBlockGroup(
 
     assert((total < 0) || (avail <= total));
 
-    for (;;)
+    if ((total >= 0) && (payload_stop > total))
+        return E_FILE_FORMAT_INVALID;
+
+    if (payload_stop > avail)
+    {
+         len = static_cast<long>(payload_size);
+         return E_BUFFER_NOT_FULL;
+    }
+
+    while (pos < payload_stop)
     {
         //parse sub-block element ID
 
@@ -6574,7 +6583,7 @@ long Cluster::ParseBlockGroup(
         {
             pos += size;  //consume sub-part of block group
 
-            if (pos >= payload_stop)
+            if (pos > payload_stop)
                 return E_FILE_FORMAT_INVALID;
 
             continue;
@@ -6582,6 +6591,9 @@ long Cluster::ParseBlockGroup(
 
         const long long block_stop = pos + size;
 
+        if (block_stop > payload_stop)
+            return E_FILE_FORMAT_INVALID;
+
         //parse track number
 
         if ((pos + 1) > avail)
@@ -6668,11 +6680,16 @@ long Cluster::ParseBlockGroup(
             return E_BUFFER_NOT_FULL;
         }
 
+        pos = block_stop;  //consume block-part of block group
+        assert(pos <= payload_stop);
+    }
+
+    assert(pos == payload_stop);
+
     CreateBlock(0x20, payload_start, payload_size);  //BlockGroup ID
     m_pos = payload_stop;
 
     return 0;  //success
-    }
 }