shithub: libvpx

Download patch

ref: e5e15eb38e015e2d56109dc977070e64c03dc2c7
parent: 993942ce0c2a3323e2652580cca5a50558537ea6
author: Dmitry Kovalev <dkovalev@google.com>
date: Sun Jun 30 22:09:36 EDT 2013 

Adding vp9_rb_read_signed_literal function.

Change-Id: I30ea91561ffac7e5065ba41b2d3ab7dedb720593


--- a/vp9/decoder/vp9_decodframe.c
+++ b/vp9/decoder/vp9_decodframe.c
@@ -512,19 +512,13 @@
     if (xd->mode_ref_lf_delta_update) {
       int i;
 
-      for (i = 0; i < MAX_REF_LF_DELTAS; i++) {
-        if (vp9_rb_read_bit(rb)) {
-          const int value = vp9_rb_read_literal(rb, 6);
-          xd->ref_lf_deltas[i] = vp9_rb_read_bit(rb) ? -value : value;
-        }
-      }
+      for (i = 0; i < MAX_REF_LF_DELTAS; i++)
+        if (vp9_rb_read_bit(rb))
+          xd->ref_lf_deltas[i] = vp9_rb_read_signed_literal(rb, 6);
 
-      for (i = 0; i < MAX_MODE_LF_DELTAS; i++) {
-        if (vp9_rb_read_bit(rb)) {
-          const int value = vp9_rb_read_literal(rb, 6);
-          xd->mode_lf_deltas[i] = vp9_rb_read_bit(rb) ? -value : value;
-        }
-      }
+      for (i = 0; i < MAX_MODE_LF_DELTAS; i++)
+        if (vp9_rb_read_bit(rb))
+          xd->mode_lf_deltas[i] = vp9_rb_read_signed_literal(rb, 6);
     }
   }
 }
@@ -531,10 +525,8 @@
 
 static int read_delta_q(struct vp9_read_bit_buffer *rb, int *delta_q) {
   const int old = *delta_q;
-  if (vp9_rb_read_bit(rb)) {
-    const int value = vp9_rb_read_literal(rb, 4);
-    *delta_q = vp9_rb_read_bit(rb) ? -value : value;
-  }
+  if (vp9_rb_read_bit(rb))
+    *delta_q = vp9_rb_read_signed_literal(rb, 4);
   return old != *delta_q;
 }
 
--- a/vp9/decoder/vp9_read_bit_buffer.h
+++ b/vp9/decoder/vp9_read_bit_buffer.h
@@ -51,4 +51,10 @@
   return value;
 }
 
+static int vp9_rb_read_signed_literal(struct vp9_read_bit_buffer *rb,
+                                      int bits) {
+  const int value = vp9_rb_read_literal(rb, bits);
+  return vp9_rb_read_bit(rb) ? -value : value;
+}
+
 #endif  // VP9_READ_BIT_BUFFER_