Moving src/webrtc into src/.

In order to eliminate the WebRTC Subtree mirror in Chromium, 
WebRTC is moving the content of the src/webrtc directory up
to the src/ directory.

NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
TBR=tommi@webrtc.org

Bug: chromium:611808
Change-Id: Iac59c5b51b950f174119565bac87955a7994bc38
Reviewed-on: https://webrtc-review.googlesource.com/1560
Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org>
Reviewed-by: Henrik Kjellander <kjellander@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#19845}

modules/audio_processing/transient/dyadic_decimator_unittest.cc

@@ -0,0 +1,126 @@
+/*
+ *  Copyright (c) 2013 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/transient/dyadic_decimator.h"
+
+#include "webrtc/test/gtest.h"
+
+namespace webrtc {
+
+static const size_t kEvenBufferLength = 6;
+static const size_t kOddBufferLength = 5;
+static const size_t kOutBufferLength = 3;
+
+int16_t const test_buffer_even_len[] = {0, 1, 2, 3, 4, 5};
+int16_t const test_buffer_odd_len[]  = {0, 1, 2, 3, 4};
+int16_t test_buffer_out[kOutBufferLength];
+
+TEST(DyadicDecimatorTest, GetOutLengthToDyadicDecimate) {
+  EXPECT_EQ(3u, GetOutLengthToDyadicDecimate(6, false));
+  EXPECT_EQ(3u, GetOutLengthToDyadicDecimate(6, true));
+  EXPECT_EQ(3u, GetOutLengthToDyadicDecimate(5, false));
+  EXPECT_EQ(2u, GetOutLengthToDyadicDecimate(5, true));
+}
+
+
+TEST(DyadicDecimatorTest, DyadicDecimateErrorValues) {
+  size_t out_samples = 0;
+
+  out_samples = DyadicDecimate(static_cast<int16_t*>(NULL),
+                               kEvenBufferLength,
+                               false,  // Even sequence.
+                               test_buffer_out,
+                               kOutBufferLength);
+  EXPECT_EQ(0u, out_samples);
+
+  out_samples = DyadicDecimate(test_buffer_even_len,
+                               kEvenBufferLength,
+                               false,  // Even sequence.
+                               static_cast<int16_t*>(NULL),
+                               kOutBufferLength);
+  EXPECT_EQ(0u, out_samples);
+
+  // Less than required |out_length|.
+  out_samples = DyadicDecimate(test_buffer_even_len,
+                               kEvenBufferLength,
+                               false,  // Even sequence.
+                               test_buffer_out,
+                               2);
+  EXPECT_EQ(0u, out_samples);
+}
+
+TEST(DyadicDecimatorTest, DyadicDecimateEvenLengthEvenSequence) {
+  size_t expected_out_samples =
+      GetOutLengthToDyadicDecimate(kEvenBufferLength, false);
+
+  size_t out_samples = DyadicDecimate(test_buffer_even_len,
+                                      kEvenBufferLength,
+                                      false,  // Even sequence.
+                                      test_buffer_out,
+                                      kOutBufferLength);
+
+  EXPECT_EQ(expected_out_samples, out_samples);
+
+  EXPECT_EQ(0, test_buffer_out[0]);
+  EXPECT_EQ(2, test_buffer_out[1]);
+  EXPECT_EQ(4, test_buffer_out[2]);
+}
+
+TEST(DyadicDecimatorTest, DyadicDecimateEvenLengthOddSequence) {
+  size_t expected_out_samples =
+      GetOutLengthToDyadicDecimate(kEvenBufferLength, true);
+
+  size_t out_samples = DyadicDecimate(test_buffer_even_len,
+                                      kEvenBufferLength,
+                                      true,  // Odd sequence.
+                                      test_buffer_out,
+                                      kOutBufferLength);
+
+  EXPECT_EQ(expected_out_samples, out_samples);
+
+  EXPECT_EQ(1, test_buffer_out[0]);
+  EXPECT_EQ(3, test_buffer_out[1]);
+  EXPECT_EQ(5, test_buffer_out[2]);
+}
+
+TEST(DyadicDecimatorTest, DyadicDecimateOddLengthEvenSequence) {
+  size_t expected_out_samples =
+      GetOutLengthToDyadicDecimate(kOddBufferLength, false);
+
+  size_t out_samples = DyadicDecimate(test_buffer_odd_len,
+                                      kOddBufferLength,
+                                      false,  // Even sequence.
+                                      test_buffer_out,
+                                      kOutBufferLength);
+
+  EXPECT_EQ(expected_out_samples, out_samples);
+
+  EXPECT_EQ(0, test_buffer_out[0]);
+  EXPECT_EQ(2, test_buffer_out[1]);
+  EXPECT_EQ(4, test_buffer_out[2]);
+}
+
+TEST(DyadicDecimatorTest, DyadicDecimateOddLengthOddSequence) {
+  size_t expected_out_samples =
+      GetOutLengthToDyadicDecimate(kOddBufferLength, true);
+
+  size_t out_samples = DyadicDecimate(test_buffer_odd_len,
+                                      kOddBufferLength,
+                                      true,  // Odd sequence.
+                                      test_buffer_out,
+                                      kOutBufferLength);
+
+  EXPECT_EQ(expected_out_samples, out_samples);
+
+  EXPECT_EQ(1, test_buffer_out[0]);
+  EXPECT_EQ(3, test_buffer_out[1]);
+}
+
+}  // namespace webrtc