shithub: libvpx

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ref: b41574e379f43988171165fa340545d91022edae
parent: 64cf3987131bf7ad1b19b7eb10cd2ceb5b0b7a1f
author: Dmitry Kovalev <[email protected]>
date: Fri Dec 13 13:05:15 EST 2013 

Removing unnecessary assert(delta != 0) from encode_loopfilter().

Change-Id: I8ae093d0b61d71d3c294b95d98d0178f7f67c8f6


--- a/vp9/encoder/vp9_bitstream.c
+++ b/vp9/encoder/vp9_bitstream.c
@@ -777,38 +777,27 @@
   vp9_wb_write_bit(wb, lf->mode_ref_delta_enabled);
 
   if (lf->mode_ref_delta_enabled) {
-    // Do the deltas need to be updated
     vp9_wb_write_bit(wb, lf->mode_ref_delta_update);
     if (lf->mode_ref_delta_update) {
-      // Send update
       for (i = 0; i < MAX_REF_LF_DELTAS; i++) {
         const int delta = lf->ref_deltas[i];
-
-        // Frame level data
-        if (delta != lf->last_ref_deltas[i]) {
+        const int changed = delta != lf->last_ref_deltas[i];
+        vp9_wb_write_bit(wb, changed);
+        if (changed) {
           lf->last_ref_deltas[i] = delta;
-          vp9_wb_write_bit(wb, 1);
-
-          assert(delta != 0);
           vp9_wb_write_literal(wb, abs(delta) & 0x3F, 6);
           vp9_wb_write_bit(wb, delta < 0);
-        } else {
-          vp9_wb_write_bit(wb, 0);
         }
       }
 
-      // Send update
       for (i = 0; i < MAX_MODE_LF_DELTAS; i++) {
         const int delta = lf->mode_deltas[i];
-        if (delta != lf->last_mode_deltas[i]) {
+        const int changed = delta != lf->last_mode_deltas[i];
+        vp9_wb_write_bit(wb, changed);
+        if (changed) {
           lf->last_mode_deltas[i] = delta;
-          vp9_wb_write_bit(wb, 1);
-
-          assert(delta != 0);
           vp9_wb_write_literal(wb, abs(delta) & 0x3F, 6);
           vp9_wb_write_bit(wb, delta < 0);
-        } else {
-          vp9_wb_write_bit(wb, 0);
         }
       }
     }