1 files changed, 54 insertions, 0 deletions
diff --git a/media/libvpx/libvpx/vpx_dsp/subtract.c b/media/libvpx/libvpx/vpx_dsp/subtract.c
new file mode 100644
index 0000000000..45c819e67a
--- /dev/null
+++ b/media/libvpx/libvpx/vpx_dsp/subtract.c
@@ -0,0 +1,54 @@
+/*
+ *  Copyright (c) 2015 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 "./vpx_config.h"
+#include "./vpx_dsp_rtcd.h"
+
+#include "vpx/vpx_integer.h"
+#include "vpx_ports/mem.h"
+
+void vpx_subtract_block_c(int rows, int cols, int16_t *diff_ptr,
+                          ptrdiff_t diff_stride, const uint8_t *src_ptr,
+                          ptrdiff_t src_stride, const uint8_t *pred_ptr,
+                          ptrdiff_t pred_stride) {
+  int r, c;
+
+  for (r = 0; r < rows; r++) {
+    for (c = 0; c < cols; c++) diff_ptr[c] = src_ptr[c] - pred_ptr[c];
+
+    diff_ptr += diff_stride;
+    pred_ptr += pred_stride;
+    src_ptr += src_stride;
+  }
+}
+
+#if CONFIG_VP9_HIGHBITDEPTH
+void vpx_highbd_subtract_block_c(int rows, int cols, int16_t *diff_ptr,
+                                 ptrdiff_t diff_stride, const uint8_t *src8_ptr,
+                                 ptrdiff_t src_stride, const uint8_t *pred8_ptr,
+                                 ptrdiff_t pred_stride, int bd) {
+  int r, c;
+  uint16_t *src = CONVERT_TO_SHORTPTR(src8_ptr);
+  uint16_t *pred = CONVERT_TO_SHORTPTR(pred8_ptr);
+  (void)bd;
+
+  for (r = 0; r < rows; r++) {
+    for (c = 0; c < cols; c++) {
+      diff_ptr[c] = src[c] - pred[c];
+    }
+
+    diff_ptr += diff_stride;
+    pred += pred_stride;
+    src += src_stride;
+  }
+}
+#endif  // CONFIG_VP9_HIGHBITDEPTH