Rename neteq4 folder to neteq

Keep the old neteq4/audio_decoder_unittests.isolate while waiting for
a hard-coded reference to change.

This CL effectively reverts r6257 "Rename neteq4 folder to neteq".

BUG=2996
TBR=tina.legrand@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/21629004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@6367 4adac7df-926f-26a2-2b94-8c16560cd09d

webrtc/modules/audio_coding/neteq/audio_classifier_unittest.cc

@@ -0,0 +1,75 @@
+/*
+ *  Copyright (c) 2014 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_coding/neteq/audio_classifier.h"
+
+#include <math.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <string>
+
+#include "gtest/gtest.h"
+#include "webrtc/test/testsupport/fileutils.h"
+
+namespace webrtc {
+
+static const size_t kFrameSize = 960;
+
+TEST(AudioClassifierTest, AllZeroInput) {
+  int16_t in_mono[kFrameSize] = {0};
+
+  // Test all-zero vectors and let the classifier converge from its default
+  // to the expected value.
+  AudioClassifier zero_classifier;
+  for (int i = 0; i < 100; ++i) {
+    zero_classifier.Analysis(in_mono, kFrameSize, 1);
+  }
+  EXPECT_TRUE(zero_classifier.is_music());
+}
+
+void RunAnalysisTest(const std::string& audio_filename,
+                     const std::string& data_filename,
+                     size_t channels) {
+  AudioClassifier classifier;
+  scoped_ptr<int16_t[]> in(new int16_t[channels * kFrameSize]);
+  bool is_music_ref;
+
+  FILE* audio_file = fopen(audio_filename.c_str(), "rb");
+  ASSERT_TRUE(audio_file != NULL) << "Failed to open file " << audio_filename
+                                  << std::endl;
+  FILE* data_file = fopen(data_filename.c_str(), "rb");
+  ASSERT_TRUE(audio_file != NULL) << "Failed to open file " << audio_filename
+                                  << std::endl;
+  while (fread(in.get(), sizeof(int16_t), channels * kFrameSize, audio_file) ==
+         channels * kFrameSize) {
+    bool is_music =
+        classifier.Analysis(in.get(), channels * kFrameSize, channels);
+    EXPECT_EQ(is_music, classifier.is_music());
+    ASSERT_EQ(1u, fread(&is_music_ref, sizeof(is_music_ref), 1, data_file));
+    EXPECT_EQ(is_music_ref, is_music);
+  }
+  fclose(audio_file);
+  fclose(data_file);
+}
+
+TEST(AudioClassifierTest, DoAnalysisMono) {
+  RunAnalysisTest(test::ResourcePath("short_mixed_mono_48", "pcm"),
+                  test::ResourcePath("short_mixed_mono_48", "dat"),
+                  1);
+}
+
+TEST(AudioClassifierTest, DoAnalysisStereo) {
+  RunAnalysisTest(test::ResourcePath("short_mixed_stereo_48", "pcm"),
+                  test::ResourcePath("short_mixed_stereo_48", "dat"),
+                  2);
+}
+
+}  // namespace webrtc