make sure that there is no negative left shift (#225)

strukturag · Feb 23, 2021 · dbff907 · dbff907
1 parent a3f1c6a
commit dbff907
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/libde265/slice.cc b/libde265/slice.cc
@@ -4174,6 +4174,11 @@ void read_pcm_samples_internal(thread_context* tctx, int x0, int y0, int log2CbS
 
   int shift = bitDepth - nPcmBits;
 
+  // a shift < 0 may result when the SPS sequence header is broken
+  if (shift < 0) {
+    shift=0;
+  }
+
   for (int y=0;y<h;y++)
     for (int x=0;x<w;x++)
       {