1 /*
2 * Copyright (c) 2012 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 // Use CreateHistUnittestFile.m to generate the input file.
12
13 #include "modules/audio_processing/agc/loudness_histogram.h"
14
15 #include <stdio.h>
16
17 #include <algorithm>
18 #include <cmath>
19 #include <memory>
20
21 #include "modules/audio_processing/agc/utility.h"
22 #include "test/gtest.h"
23 #include "test/testsupport/file_utils.h"
24
25 namespace webrtc {
26
27 struct InputOutput {
28 double rms;
29 double activity_probability;
30 double audio_content;
31 double loudness;
32 };
33
34 const double kRelativeErrTol = 1e-10;
35
36 class LoudnessHistogramTest : public ::testing::Test {
37 protected:
38 void RunTest(bool enable_circular_buff, const char* filename);
39
40 private:
41 void TestClean();
42 std::unique_ptr<LoudnessHistogram> hist_;
43 };
44
TestClean()45 void LoudnessHistogramTest::TestClean() {
46 EXPECT_EQ(hist_->CurrentRms(), 7.59621091765857e-02);
47 EXPECT_EQ(hist_->AudioContent(), 0);
48 EXPECT_EQ(hist_->num_updates(), 0);
49 }
50
RunTest(bool enable_circular_buff,const char * filename)51 void LoudnessHistogramTest::RunTest(bool enable_circular_buff,
52 const char* filename) {
53 FILE* in_file = fopen(filename, "rb");
54 ASSERT_TRUE(in_file != NULL);
55 if (enable_circular_buff) {
56 int buffer_size;
57 EXPECT_EQ(fread(&buffer_size, sizeof(buffer_size), 1, in_file), 1u);
58 hist_.reset(LoudnessHistogram::Create(buffer_size));
59 } else {
60 hist_.reset(LoudnessHistogram::Create());
61 }
62 TestClean();
63
64 InputOutput io;
65 int num_updates = 0;
66 int num_reset = 0;
67 while (fread(&io, sizeof(InputOutput), 1, in_file) == 1) {
68 if (io.rms < 0) {
69 // We have to reset.
70 hist_->Reset();
71 TestClean();
72 num_updates = 0;
73 num_reset++;
74 // Read the next chunk of input.
75 if (fread(&io, sizeof(InputOutput), 1, in_file) != 1)
76 break;
77 }
78 hist_->Update(io.rms, io.activity_probability);
79 num_updates++;
80 EXPECT_EQ(hist_->num_updates(), num_updates);
81 double audio_content = hist_->AudioContent();
82
83 double abs_err =
84 std::min(audio_content, io.audio_content) * kRelativeErrTol;
85
86 ASSERT_NEAR(audio_content, io.audio_content, abs_err);
87 double current_loudness = Linear2Loudness(hist_->CurrentRms());
88 abs_err =
89 std::min(fabs(current_loudness), fabs(io.loudness)) * kRelativeErrTol;
90 ASSERT_NEAR(current_loudness, io.loudness, abs_err);
91 }
92 fclose(in_file);
93 }
94
TEST_F(LoudnessHistogramTest,ActiveCircularBuffer)95 TEST_F(LoudnessHistogramTest, ActiveCircularBuffer) {
96 RunTest(true, test::ResourcePath(
97 "audio_processing/agc/agc_with_circular_buffer", "dat")
98 .c_str());
99 }
100
TEST_F(LoudnessHistogramTest,InactiveCircularBuffer)101 TEST_F(LoudnessHistogramTest, InactiveCircularBuffer) {
102 RunTest(false, test::ResourcePath(
103 "audio_processing/agc/agc_no_circular_buffer", "dat")
104 .c_str());
105 }
106
107 } // namespace webrtc
108