diff -r 000000000000 -r 6474c204b198 media/libvpx/vp8/encoder/x86/denoising_sse2.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/media/libvpx/vp8/encoder/x86/denoising_sse2.c	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,120 @@
+/*
+ *  Copyright (c) 2012 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 "vp8/encoder/denoising.h"
+#include "vp8/common/reconinter.h"
+#include "vpx/vpx_integer.h"
+#include "vpx_mem/vpx_mem.h"
+#include "vp8_rtcd.h"
+
+#include <emmintrin.h>
+#include "vpx_ports/emmintrin_compat.h"
+
+union sum_union {
+    __m128i v;
+    signed char e[16];
+};
+
+int vp8_denoiser_filter_sse2(YV12_BUFFER_CONFIG *mc_running_avg,
+                             YV12_BUFFER_CONFIG *running_avg,
+                             MACROBLOCK *signal, unsigned int motion_magnitude,
+                             int y_offset, int uv_offset)
+{
+    unsigned char *sig = signal->thismb;
+    int sig_stride = 16;
+    unsigned char *mc_running_avg_y = mc_running_avg->y_buffer + y_offset;
+    int mc_avg_y_stride = mc_running_avg->y_stride;
+    unsigned char *running_avg_y = running_avg->y_buffer + y_offset;
+    int avg_y_stride = running_avg->y_stride;
+    int r;
+    __m128i acc_diff = _mm_setzero_si128();
+    const __m128i k_0 = _mm_setzero_si128();
+    const __m128i k_4 = _mm_set1_epi8(4);
+    const __m128i k_8 = _mm_set1_epi8(8);
+    const __m128i k_16 = _mm_set1_epi8(16);
+    /* Modify each level's adjustment according to motion_magnitude. */
+    const __m128i l3 = _mm_set1_epi8(
+                      (motion_magnitude <= MOTION_MAGNITUDE_THRESHOLD) ? 7 : 6);
+    /* Difference between level 3 and level 2 is 2. */
+    const __m128i l32 = _mm_set1_epi8(2);
+    /* Difference between level 2 and level 1 is 1. */
+    const __m128i l21 = _mm_set1_epi8(1);
+
+    for (r = 0; r < 16; ++r)
+    {
+        /* Calculate differences */
+        const __m128i v_sig = _mm_loadu_si128((__m128i *)(&sig[0]));
+        const __m128i v_mc_running_avg_y = _mm_loadu_si128(
+                                           (__m128i *)(&mc_running_avg_y[0]));
+        __m128i v_running_avg_y;
+        const __m128i pdiff = _mm_subs_epu8(v_mc_running_avg_y, v_sig);
+        const __m128i ndiff = _mm_subs_epu8(v_sig, v_mc_running_avg_y);
+        /* Obtain the sign. FF if diff is negative. */
+        const __m128i diff_sign = _mm_cmpeq_epi8(pdiff, k_0);
+        /* Clamp absolute difference to 16 to be used to get mask. Doing this
+         * allows us to use _mm_cmpgt_epi8, which operates on signed byte. */
+        const __m128i clamped_absdiff = _mm_min_epu8(
+                                        _mm_or_si128(pdiff, ndiff), k_16);
+        /* Get masks for l2 l1 and l0 adjustments */
+        const __m128i mask2 = _mm_cmpgt_epi8(k_16, clamped_absdiff);
+        const __m128i mask1 = _mm_cmpgt_epi8(k_8, clamped_absdiff);
+        const __m128i mask0 = _mm_cmpgt_epi8(k_4, clamped_absdiff);
+        /* Get adjustments for l2, l1, and l0 */
+        __m128i adj2 = _mm_and_si128(mask2, l32);
+        const __m128i adj1 = _mm_and_si128(mask1, l21);
+        const __m128i adj0 = _mm_and_si128(mask0, clamped_absdiff);
+        __m128i adj,  padj, nadj;
+
+        /* Combine the adjustments and get absolute adjustments. */
+        adj2 = _mm_add_epi8(adj2, adj1);
+        adj = _mm_sub_epi8(l3, adj2);
+        adj = _mm_andnot_si128(mask0, adj);
+        adj = _mm_or_si128(adj, adj0);
+
+        /* Restore the sign and get positive and negative adjustments. */
+        padj = _mm_andnot_si128(diff_sign, adj);
+        nadj = _mm_and_si128(diff_sign, adj);
+
+        /* Calculate filtered value. */
+        v_running_avg_y = _mm_adds_epu8(v_sig, padj);
+        v_running_avg_y = _mm_subs_epu8(v_running_avg_y, nadj);
+        _mm_storeu_si128((__m128i *)running_avg_y, v_running_avg_y);
+
+        /* Adjustments <=7, and each element in acc_diff can fit in signed
+         * char.
+         */
+        acc_diff = _mm_adds_epi8(acc_diff, padj);
+        acc_diff = _mm_subs_epi8(acc_diff, nadj);
+
+        /* Update pointers for next iteration. */
+        sig += sig_stride;
+        mc_running_avg_y += mc_avg_y_stride;
+        running_avg_y += avg_y_stride;
+    }
+
+    {
+        /* Compute the sum of all pixel differences of this MB. */
+        union sum_union s;
+        int sum_diff = 0;
+        s.v = acc_diff;
+        sum_diff = s.e[0] + s.e[1] + s.e[2] + s.e[3] + s.e[4] + s.e[5]
+                 + s.e[6] + s.e[7] + s.e[8] + s.e[9] + s.e[10] + s.e[11]
+                 + s.e[12] + s.e[13] + s.e[14] + s.e[15];
+
+        if (abs(sum_diff) > SUM_DIFF_THRESHOLD)
+        {
+            return COPY_BLOCK;
+        }
+    }
+
+    vp8_copy_mem16x16(running_avg->y_buffer + y_offset, avg_y_stride,
+                      signal->thismb, sig_stride);
+    return FILTER_BLOCK;
+}