entropy: disable aec trailing 0xff-byte pruning

In order to implement the reversed bypass stream, it is necessary that the arithmetic encoder outputs an independently decodable stream that does not rely upon bounded read operations that insert 0xff bytes when the entire aec sub-stream input is consumed (since there will be no indication of the sub-stream length).

entropy: disable aec trailing 0xff-byte pruning
In order to implement the reversed bypass stream, it is necessary that the arithmetic encoder outputs an independently decodable stream that does not rely upon bounded read operations that insert 0xff bytes when the entire aec sub-stream input is consumed (since there will be no indication of the sub-stream length).
053cd4dd · David Flynn · David Flynn · 81f2d561 · 053cd4dd
Commit 053cd4dd authored Feb 14, 2019 by David Flynn Committed by David Flynn Aug 12, 2019
--- a/dependencies/schroedinger/schroarith.c
+++ b/dependencies/schroedinger/schroarith.c
@@ -215,9 +215,6 @@ schro_arith_flush (SchroArith * arith)
    arith->dataptr[arith->offset] = arith->range[0] >> 0;
    arith->offset++;
  }
-  while (arith->offset > 1 && arith->dataptr[arith->offset - 1] == 0xff) {
-    arith->offset--;
-  }
 }

 /* wrappers */