Add vector_math::FMUL. Replace audio_util::AdjustVolume.

media/base/simd/vector_math_sse.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "media/base/vector_math_testing.h"
 
 #include <xmmintrin.h>  // NOLINT
 
 namespace media {
 namespace vector_math {
 
+void FMUL_SSE(const float src[], float scale, int len, float dest[]) {
+  const int rem = len % 4;
+  const int last_index = len - rem;
+  __m128 m_scale = _mm_set_ps1(scale);
+  for (int i = 0; i < last_index; i += 4)
+    _mm_store_ps(dest + i, _mm_mul_ps(_mm_load_ps(src + i), m_scale));
+
+  // Handle any remaining values that wouldn't fit in an SSE pass.
+  for (int i = last_index; i < len; ++i)
+    dest[i] = src[i] * scale;
+}
+
 void FMAC_SSE(const float src[], float scale, int len, float dest[]) {
   const int rem = len % 4;
   const int last_index = len - rem;
   __m128 m_scale = _mm_set_ps1(scale);
   for (int i = 0; i < last_index; i += 4) {
     _mm_store_ps(dest + i, _mm_add_ps(_mm_load_ps(dest + i),
                  _mm_mul_ps(_mm_load_ps(src + i), m_scale)));
   }
 
   // Handle any remaining values that wouldn't fit in an SSE pass.
   for (int i = last_index; i < len; ++i)
     dest[i] += src[i] * scale;
 }
 
 }  // namespace vector_math
 }  // namespace media