shithub: libvpx

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ref: c8f481fa3d1cac58acdef586e6b3983a1998e97c
parent: 6d3db91d3bbb3e4e341198e2826e8938cf0f9699
author: Jingning Han <jingning@google.com>
date: Fri Oct 4 04:51:22 EDT 2013 

Restore mode skip feature in sub8x8 rd loop

This commit restores the mode skip feature in the sub8x8 rd loop.

Change-Id: I5496ee32053f572b8961b549e9ecd4f1360824de


--- a/vp9/encoder/vp9_rdopt.c
+++ b/vp9/encoder/vp9_rdopt.c
@@ -3910,6 +3910,32 @@
     ref_frame = vp9_ref_order[mode_index].ref_frame;
     second_ref_frame = vp9_ref_order[mode_index].second_ref_frame;
 
+    // Look at the reference frame of the best mode so far and set the
+    // skip mask to look at a subset of the remaining modes.
+    if (mode_index > 2 && cpi->sf.mode_skip_start < MAX_MODES) {
+      if (mode_index == 3) {
+        switch (vp9_ref_order[best_mode_index].ref_frame) {
+          case INTRA_FRAME:
+            cpi->mode_skip_mask = 0;
+            break;
+          case LAST_FRAME:
+            cpi->mode_skip_mask = 0x0010;
+            break;
+          case GOLDEN_FRAME:
+            cpi->mode_skip_mask = 0x0008;
+            break;
+          case ALTREF_FRAME:
+            cpi->mode_skip_mask = 0x0000;
+            break;
+          case NONE:
+          case MAX_REF_FRAMES:
+            assert(!"Invalid Reference frame");
+        }
+      }
+      if (cpi->mode_skip_mask & ((int64_t)1 << mode_index))
+        continue;
+    }
+
     // Skip if the current reference frame has been masked off
     if (cpi->sf.reference_masking && !cpi->set_ref_frame_mask &&
         (cpi->ref_frame_mask & (1 << ref_frame)))