1 files changed, 53 insertions, 0 deletions
diff --git a/vp8/encoder/satd_c.c b/vp8/encoder/satd_c.c
new file mode 100644
index 000000000..88c304b1f
--- /dev/null
+++ b/vp8/encoder/satd_c.c
@@ -0,0 +1,53 @@
+/*
+ *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include <stdlib.h>
+#include "dct.h"
+#include "vpx_ports/mem.h"
+
+unsigned int vp8_satd16x16_c(const unsigned char *src_ptr,
+                             int  src_stride,
+                             const unsigned char *ref_ptr,
+                             int  ref_stride,
+                             unsigned int *psatd)
+{
+    int r, c, i;
+    unsigned int satd = 0;
+    DECLARE_ALIGNED(16, short, diff_in[256]);
+    DECLARE_ALIGNED(16, short, diff_out[16]);
+    short *in;
+
+    for (r = 0; r < 16; r++)
+    {
+        for (c = 0; c < 16; c++)
+        {
+            diff_in[r * 16 + c] = src_ptr[c] - ref_ptr[c];
+        }
+        src_ptr += src_stride;
+        ref_ptr += ref_stride;
+    }
+
+    in = diff_in;
+    for (r = 0; r < 16; r += 4)
+    {
+        for (c = 0; c < 16; c+=4)
+        {
+            vp8_short_walsh4x4_c(in + c, diff_out, 32);
+            for(i = 0; i < 16; i++)
+                satd += abs(diff_out[i]);
+        }
+        in += 64;
+    }
+
+    if (psatd)
+        *psatd = satd;
+
+    return satd;
+}