Add msac optimizations

 * Eliminate the trailing zero after the CDF probabilities. We can
   reuse the count value as a terminator instead. This reduces the
   size of the CDF context by around 8%.

 * Align the CDF arrays.

 * Various other minor optimizations.

1 files changed, 3 insertions, 3 deletions

diff --git a/src/internal.h b/src/internal.h
index 45863d2..86caee4 100644
--- a/src/internal.h
+++ b/src/internal.h
@@ -241,14 +241,14 @@ struct Dav1dFrameContext {
 };
 
 struct Dav1dTileState {
+    CdfContext cdf;
+    MsacContext msac;
+
     struct {
         int col_start, col_end, row_start, row_end; // in 4px units
         int col, row; // in tile units
     } tiling;
 
-    CdfContext cdf;
-    MsacContext msac;
-
     atomic_int progress; // in sby units, TILE_ERROR after a decoding error
     struct {
         pthread_mutex_t lock;