shithub: libvpx

Download patch

ref: 3cd889762364da9914a136cf8735b8524f3b341e
parent: eb927039fdae58552bb5fffe46d1d6c4d6a061b1
parent: 20eef6757362dcca3cd82ad7e0e39e8c3e29768b
author: Dmitry Kovalev <dkovalev@google.com>
date: Tue May 7 08:59:12 EDT 2013 

Merge "Adding encode_loopfilter function." into experimental


--- a/vp9/encoder/vp9_bitstream.c
+++ b/vp9/encoder/vp9_bitstream.c
@@ -1618,6 +1618,62 @@
   }
 }
 
+static void encode_loopfilter(MACROBLOCKD *xd, vp9_writer *w) {
+  int i;
+
+  // Write out loop filter deltas applied at the MB level based on mode or
+  // ref frame (if they are enabled).
+  vp9_write_bit(w, xd->mode_ref_lf_delta_enabled);
+
+  if (xd->mode_ref_lf_delta_enabled) {
+    // Do the deltas need to be updated
+    vp9_write_bit(w, xd->mode_ref_lf_delta_update);
+    if (xd->mode_ref_lf_delta_update) {
+      // Send update
+      for (i = 0; i < MAX_REF_LF_DELTAS; i++) {
+        const int delta = xd->ref_lf_deltas[i];
+
+        // Frame level data
+        if (delta != xd->last_ref_lf_deltas[i]) {
+          xd->last_ref_lf_deltas[i] = delta;
+          vp9_write_bit(w, 1);
+
+          if (delta > 0) {
+            vp9_write_literal(w, delta & 0x3F, 6);
+            vp9_write_bit(w, 0);  // sign
+          } else {
+            assert(delta < 0);
+            vp9_write_literal(w, (-delta) & 0x3F, 6);
+            vp9_write_bit(w, 1);  // sign
+          }
+        } else {
+          vp9_write_bit(w, 0);
+        }
+      }
+
+      // Send update
+      for (i = 0; i < MAX_MODE_LF_DELTAS; i++) {
+        const int delta = xd->mode_lf_deltas[i];
+        if (delta != xd->last_mode_lf_deltas[i]) {
+          xd->last_mode_lf_deltas[i] = delta;
+          vp9_write_bit(w, 1);
+
+          if (delta > 0) {
+            vp9_write_literal(w, delta & 0x3F, 6);
+            vp9_write_bit(w, 0);  // sign
+          } else {
+            assert(delta < 0);
+            vp9_write_literal(w, (-delta) & 0x3F, 6);
+            vp9_write_bit(w, 1);  // sign
+          }
+        } else {
+          vp9_write_bit(w, 0);
+        }
+      }
+    }
+  }
+}
+
 static void encode_segmentation(VP9_COMP *cpi, vp9_writer *w) {
   int i, j;
   VP9_COMMON *const pc = &cpi->common;
@@ -1772,57 +1828,7 @@
   }
 #endif
 
-  // Write out loop filter deltas applied at the MB level based on mode or ref frame (if they are enabled).
-  vp9_write_bit(&header_bc, (xd->mode_ref_lf_delta_enabled) ? 1 : 0);
-
-  if (xd->mode_ref_lf_delta_enabled) {
-    // Do the deltas need to be updated
-    vp9_write_bit(&header_bc, xd->mode_ref_lf_delta_update);
-    if (xd->mode_ref_lf_delta_update) {
-      // Send update
-      for (i = 0; i < MAX_REF_LF_DELTAS; i++) {
-        const int delta = xd->ref_lf_deltas[i];
-
-        // Frame level data
-        if (delta != xd->last_ref_lf_deltas[i]) {
-          xd->last_ref_lf_deltas[i] = delta;
-          vp9_write_bit(&header_bc, 1);
-
-          if (delta > 0) {
-            vp9_write_literal(&header_bc, delta & 0x3F, 6);
-            vp9_write_bit(&header_bc, 0);  // sign
-          } else {
-            assert(delta < 0);
-            vp9_write_literal(&header_bc, (-delta) & 0x3F, 6);
-            vp9_write_bit(&header_bc, 1);  // sign
-          }
-        } else {
-          vp9_write_bit(&header_bc, 0);
-        }
-      }
-
-      // Send update
-      for (i = 0; i < MAX_MODE_LF_DELTAS; i++) {
-        const int delta = xd->mode_lf_deltas[i];
-
-        if (delta != xd->last_mode_lf_deltas[i]) {
-          xd->last_mode_lf_deltas[i] = delta;
-          vp9_write_bit(&header_bc, 1);
-
-          if (delta > 0) {
-            vp9_write_literal(&header_bc, delta & 0x3F, 6);
-            vp9_write_bit(&header_bc, 0);  // sign
-          } else {
-            assert(delta < 0);
-            vp9_write_literal(&header_bc, (-delta) & 0x3F, 6);
-            vp9_write_bit(&header_bc, 1);  // sign
-          }
-        } else {
-          vp9_write_bit(&header_bc, 0);
-        }
-      }
-    }
-  }
+  encode_loopfilter(xd, &header_bc);
 
   // Frame Q baseline quantizer index
   vp9_write_literal(&header_bc, pc->base_qindex, QINDEX_BITS);