1/*
2 *  Copyright (c) 2014 The WebRTC project authors. All Rights Reserved.
3 *
4 *  Use of this source code is governed by a BSD-style license
5 *  that can be found in the LICENSE file in the root of the source
6 *  tree. An additional intellectual property rights grant can be found
7 *  in the file PATENTS.  All contributing project authors may
8 *  be found in the AUTHORS file in the root of the source tree.
9 */
10
11#include "webrtc/modules/audio_coding/neteq/audio_classifier.h"
12
13#include <math.h>
14#include <stdio.h>
15#include <stdlib.h>
16#include <string.h>
17#include <string>
18
19#include "testing/gtest/include/gtest/gtest.h"
20#include "webrtc/test/testsupport/fileutils.h"
21
22namespace webrtc {
23
24static const size_t kFrameSize = 960;
25
26TEST(AudioClassifierTest, AllZeroInput) {
27  int16_t in_mono[kFrameSize] = {0};
28
29  // Test all-zero vectors and let the classifier converge from its default
30  // to the expected value.
31  AudioClassifier zero_classifier;
32  for (int i = 0; i < 100; ++i) {
33    zero_classifier.Analysis(in_mono, kFrameSize, 1);
34  }
35  EXPECT_TRUE(zero_classifier.is_music());
36}
37
38void RunAnalysisTest(const std::string& audio_filename,
39                     const std::string& data_filename,
40                     size_t channels) {
41  AudioClassifier classifier;
42  scoped_ptr<int16_t[]> in(new int16_t[channels * kFrameSize]);
43  bool is_music_ref;
44
45  FILE* audio_file = fopen(audio_filename.c_str(), "rb");
46  ASSERT_TRUE(audio_file != NULL) << "Failed to open file " << audio_filename
47                                  << std::endl;
48  FILE* data_file = fopen(data_filename.c_str(), "rb");
49  ASSERT_TRUE(audio_file != NULL) << "Failed to open file " << audio_filename
50                                  << std::endl;
51  while (fread(in.get(), sizeof(int16_t), channels * kFrameSize, audio_file) ==
52         channels * kFrameSize) {
53    bool is_music =
54        classifier.Analysis(in.get(), channels * kFrameSize, channels);
55    EXPECT_EQ(is_music, classifier.is_music());
56    ASSERT_EQ(1u, fread(&is_music_ref, sizeof(is_music_ref), 1, data_file));
57    EXPECT_EQ(is_music_ref, is_music);
58  }
59  fclose(audio_file);
60  fclose(data_file);
61}
62
63TEST(AudioClassifierTest, DoAnalysisMono) {
64  RunAnalysisTest(test::ResourcePath("short_mixed_mono_48", "pcm"),
65                  test::ResourcePath("short_mixed_mono_48", "dat"),
66                  1);
67}
68
69TEST(AudioClassifierTest, DoAnalysisStereo) {
70  RunAnalysisTest(test::ResourcePath("short_mixed_stereo_48", "pcm"),
71                  test::ResourcePath("short_mixed_stereo_48", "dat"),
72                  2);
73}
74
75}  // namespace webrtc
76