Finalization of the first version of EchoCanceller 3

webrtc/modules/audio_processing/aec3/aec3_common.cc

Index: webrtc/modules/audio_processing/aec3/aec3_common.cc
diff --git a/webrtc/modules/audio_processing/aec3/aec3_common.cc b/webrtc/modules/audio_processing/aec3/aec3_common.cc
new file mode 100644
index 0000000000000000000000000000000000000000..da0f2c4f19fd89d9b4216e931e6bdceee581adc4
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+++ b/webrtc/modules/audio_processing/aec3/aec3_common.cc
@@ -0,0 +1,27 @@
+/*
+ *  Copyright (c) 2017 The WebRTC 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 "webrtc/modules/audio_processing/aec3/aec3_common.h"
+
+#include "webrtc/typedefs.h"
+#include "webrtc/system_wrappers/include/cpu_features_wrapper.h"
+
+namespace webrtc {
+
+Aec3Optimization DetectOptimization() {
+#if defined(WEBRTC_ARCH_X86_FAMILY)
+  if (WebRtc_GetCPUInfo(kSSE2) != 0) {
+    return Aec3Optimization::kSse2;
+  }
+#endif
+  return Aec3Optimization::kNone;
+}
+
+}  // namespace webrtc