1 files changed, 58 insertions, 0 deletions
diff --git a/vpx_dsp/sse.c b/vpx_dsp/sse.c
new file mode 100644
index 000000000..6cb4b705f
--- /dev/null
+++ b/vpx_dsp/sse.c
@@ -0,0 +1,58 @@
+/*
+ *  Copyright (c) 2023 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.
+ */
+
+/*
+ * Sum the square of the difference between every corresponding element of the
+ * buffers.
+ */
+
+#include <stdlib.h>
+
+#include "./vpx_config.h"
+#include "./vpx_dsp_rtcd.h"
+
+#include "vpx/vpx_integer.h"
+
+int64_t vpx_sse_c(const uint8_t *a, int a_stride, const uint8_t *b,
+                  int b_stride, int width, int height) {
+  int y, x;
+  int64_t sse = 0;
+
+  for (y = 0; y < height; y++) {
+    for (x = 0; x < width; x++) {
+      const int32_t diff = abs(a[x] - b[x]);
+      sse += diff * diff;
+    }
+
+    a += a_stride;
+    b += b_stride;
+  }
+  return sse;
+}
+
+#if CONFIG_VP9_HIGHBITDEPTH
+int64_t vpx_highbd_sse_c(const uint8_t *a8, int a_stride, const uint8_t *b8,
+                         int b_stride, int width, int height) {
+  int y, x;
+  int64_t sse = 0;
+  uint16_t *a = CONVERT_TO_SHORTPTR(a8);
+  uint16_t *b = CONVERT_TO_SHORTPTR(b8);
+  for (y = 0; y < height; y++) {
+    for (x = 0; x < width; x++) {
+      const int32_t diff = (int32_t)(a[x]) - (int32_t)(b[x]);
+      sse += diff * diff;
+    }
+
+    a += a_stride;
+    b += b_stride;
+  }
+  return sse;
+}
+#endif