Finalization of the first version of EchoCanceller 3

webrtc/modules/audio_processing/aec3/suppression_gain_unittest.cc

+/*
+ *  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/suppression_gain.h"
+
+#include "webrtc/typedefs.h"
+#include "webrtc/system_wrappers/include/cpu_features_wrapper.h"
+#include "webrtc/test/gtest.h"
+
+namespace webrtc {
+
+#if RTC_DCHECK_IS_ON && GTEST_HAS_DEATH_TEST && !defined(WEBRTC_ANDROID)
+
+// Verifies that the check for non-null output gains works.
+TEST(SuppressionGain, NullOutputGains) {
+  std::array<float, kFftLengthBy2Plus1> E2;
+  std::array<float, kFftLengthBy2Plus1> R2;
+  std::array<float, kFftLengthBy2Plus1> N2;
+  EXPECT_DEATH(
+      SuppressionGain(DetectOptimization()).GetGain(E2, R2, N2, 0.1f, nullptr),
+      "");
+}
+
+#endif
+
+#if defined(WEBRTC_ARCH_X86_FAMILY)
+// Verifies that the optimized methods are bitexact to their reference
+// counterparts.
+TEST(SuppressionGain, TestOptimizations) {
+  if (WebRtc_GetCPUInfo(kSSE2) != 0) {
+    std::array<float, kFftLengthBy2 - 1> G2_old;
+    std::array<float, kFftLengthBy2 - 1> M2_old;
+    std::array<float, kFftLengthBy2 - 1> G2_old_SSE2;
+    std::array<float, kFftLengthBy2 - 1> M2_old_SSE2;
+    std::array<float, kFftLengthBy2Plus1> E2;
+    std::array<float, kFftLengthBy2Plus1> R2;
+    std::array<float, kFftLengthBy2Plus1> N2;
+    std::array<float, kFftLengthBy2Plus1> g;
+    std::array<float, kFftLengthBy2Plus1> g_SSE2;
+
+    G2_old.fill(1.f);
+    M2_old.fill(.23f);
+    G2_old_SSE2.fill(1.f);
+    M2_old_SSE2.fill(.23f);
+
+    E2.fill(10.f);
+    R2.fill(0.1f);
+    N2.fill(100.f);
+    for (int k = 0; k < 10; ++k) {
+      ComputeGains(E2, R2, N2, 0.1f, &G2_old, &M2_old, &g);
+      ComputeGains_SSE2(E2, R2, N2, 0.1f, &G2_old_SSE2, &M2_old_SSE2, &g_SSE2);
+      for (size_t j = 0; j < G2_old.size(); ++j) {
+        EXPECT_NEAR(G2_old[j], G2_old_SSE2[j], 0.0000001f);

[hlundin-webrtc, 2017/02/21 16:34:03]

Would EXPECT_FLOAT_EQ work here?

[peah-webrtc, 2017/02/21 23:00:41]

No, it would not, as the SSE2 sqrt method seems not to be that accurate.

[hlundin-webrtc, 2017/02/22 15:24:05]

Acknowledged.

[peah-webrtc, 2017/02/22 23:51:36]

Acknowledged.

+      }
+      for (size_t j = 0; j < M2_old.size(); ++j) {
+        EXPECT_NEAR(M2_old[j], M2_old_SSE2[j], 0.0000001f);
+      }
+      for (size_t j = 0; j < g.size(); ++j) {
+        EXPECT_NEAR(g[j], g_SSE2[j], 0.0000001f);
+      }
+    }
+
+    E2.fill(100.f);
+    R2.fill(0.1f);
+    N2.fill(0.f);
+    for (int k = 0; k < 10; ++k) {
+      ComputeGains(E2, R2, N2, 0.1f, &G2_old, &M2_old, &g);
+      ComputeGains_SSE2(E2, R2, N2, 0.1f, &G2_old_SSE2, &M2_old_SSE2, &g_SSE2);
+      for (size_t j = 0; j < G2_old.size(); ++j) {
+        EXPECT_NEAR(G2_old[j], G2_old_SSE2[j], 0.0000001f);
+      }
+      for (size_t j = 0; j < M2_old.size(); ++j) {
+        EXPECT_NEAR(M2_old[j], M2_old_SSE2[j], 0.0000001f);
+      }
+      for (size_t j = 0; j < g.size(); ++j) {
+        EXPECT_NEAR(g[j], g_SSE2[j], 0.0000001f);
+      }
+    }
+
+    E2.fill(0.1f);
+    R2.fill(100.f);
+    N2.fill(0.f);
+    for (int k = 0; k < 10; ++k) {
+      ComputeGains(E2, R2, N2, 0.1f, &G2_old, &M2_old, &g);
+      ComputeGains_SSE2(E2, R2, N2, 0.1f, &G2_old_SSE2, &M2_old_SSE2, &g_SSE2);
+      for (size_t j = 0; j < G2_old.size(); ++j) {
+        EXPECT_NEAR(G2_old[j], G2_old_SSE2[j], 0.0000001f);
+      }
+      for (size_t j = 0; j < M2_old.size(); ++j) {
+        EXPECT_NEAR(M2_old[j], M2_old_SSE2[j], 0.0000001f);
+      }
+      for (size_t j = 0; j < g.size(); ++j) {
+        EXPECT_NEAR(g[j], g_SSE2[j], 0.0000001f);
+      }
+    }
+  }
+}
+#endif
+
+// Does a sanity check that the gains are correctly computed.
+TEST(SuppressionGain, BasicGainComputation) {
+  SuppressionGain suppression_gain(DetectOptimization());
+  std::array<float, kFftLengthBy2Plus1> E2;
+  std::array<float, kFftLengthBy2Plus1> R2;
+  std::array<float, kFftLengthBy2Plus1> N2;
+  std::array<float, kFftLengthBy2Plus1> g;
+
+  // Ensure that a strong noise is detected to mask any echoes.
+  E2.fill(10.f);
+  R2.fill(0.1f);
+  N2.fill(100.f);
+  for (int k = 0; k < 10; ++k) {
+    suppression_gain.GetGain(E2, R2, N2, 0.1f, &g);
+  }
+  std::for_each(g.begin(), g.end(),
+                [](float a) { EXPECT_NEAR(1.f, a, 0.001); });
+
+  // Ensure that a strong nearend is detected to mask any echoes.
+  E2.fill(100.f);
+  R2.fill(0.1f);
+  N2.fill(0.f);
+  for (int k = 0; k < 10; ++k) {
+    suppression_gain.GetGain(E2, R2, N2, 0.1f, &g);
+  }
+  std::for_each(g.begin(), g.end(),
+                [](float a) { EXPECT_NEAR(1.f, a, 0.001); });
+
+  // Ensure that a strong echo is suppressed.
+  E2.fill(0.1f);
+  R2.fill(100.f);
+  N2.fill(0.f);
+  for (int k = 0; k < 10; ++k) {
+    suppression_gain.GetGain(E2, R2, N2, 0.1f, &g);
+  }
+  std::for_each(g.begin(), g.end(),
+                [](float a) { EXPECT_NEAR(0.f, a, 0.001); });
+}
+
+}  // namespace webrtc