1 files changed, 54 insertions, 0 deletions
diff --git a/media/libvpx/libvpx/vpx_dsp/mips/add_noise_msa.c b/media/libvpx/libvpx/vpx_dsp/mips/add_noise_msa.c
new file mode 100644
index 0000000000..97541411e4
--- /dev/null
+++ b/media/libvpx/libvpx/vpx_dsp/mips/add_noise_msa.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_dsp_rtcd.h"
+#include "vpx_dsp/mips/macros_msa.h"
+
+void vpx_plane_add_noise_msa(uint8_t *start_ptr, const int8_t *noise,
+                             int blackclamp, int whiteclamp, int width,
+                             int height, int32_t pitch) {
+  int i, j;
+  v16u8 pos0, pos1, ref0, ref1;
+  v16i8 black_clamp, white_clamp, both_clamp;
+
+  black_clamp = __msa_fill_b(blackclamp);
+  white_clamp = __msa_fill_b(whiteclamp);
+  both_clamp = black_clamp + white_clamp;
+  both_clamp = -both_clamp;
+
+  for (i = 0; i < height / 2; ++i) {
+    uint8_t *pos0_ptr = start_ptr + (2 * i) * pitch;
+    const int8_t *ref0_ptr = noise + (rand() & 0xff);
+    uint8_t *pos1_ptr = start_ptr + (2 * i + 1) * pitch;
+    const int8_t *ref1_ptr = noise + (rand() & 0xff);
+    for (j = width / 16; j--;) {
+      pos0 = LD_UB(pos0_ptr);
+      ref0 = LD_UB(ref0_ptr);
+      pos1 = LD_UB(pos1_ptr);
+      ref1 = LD_UB(ref1_ptr);
+      pos0 = __msa_subsus_u_b(pos0, black_clamp);
+      pos1 = __msa_subsus_u_b(pos1, black_clamp);
+      pos0 = __msa_subsus_u_b(pos0, both_clamp);
+      pos1 = __msa_subsus_u_b(pos1, both_clamp);
+      pos0 = __msa_subsus_u_b(pos0, white_clamp);
+      pos1 = __msa_subsus_u_b(pos1, white_clamp);
+      pos0 += ref0;
+      ST_UB(pos0, pos0_ptr);
+      pos1 += ref1;
+      ST_UB(pos1, pos1_ptr);
+      pos0_ptr += 16;
+      pos1_ptr += 16;
+      ref0_ptr += 16;
+      ref1_ptr += 16;
+    }
+  }
+}