1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
|
/*!
* \file
* \brief Audio streaming test program
* \author Andy Panov
*
* -------------------------------------------------------------------------
*
* Copyright (C) 2013 (see AUTHORS file for a list of contributors)
*
* This file is part of IT++ - a C++ library of mathematical, signal
* processing, speech processing, and communications classes and functions.
*
* IT++ is free software: you can redistribute it and/or modify it under the
* terms of the GNU General Public License as published by the Free Software
* Foundation, either version 3 of the License, or (at your option) any
* later version.
*
* IT++ is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License along
* with IT++. If not, see <http://www.gnu.org/licenses/>.
*
* -------------------------------------------------------------------------
*/
#include <itpp/itbase.h>
#include <itpp/itsrccode.h>
#include "gtest/gtest.h"
#include <iomanip>
using namespace itpp;
using namespace std;
// To rewrite the AUDIOFILE_REF_FILE uncomment the following definition
// #define SAVE_DATA
//reference data
const string ref_file_name = "audiofile_ref_data.au";
const int ref_num_samples = 5000;
const int ref_num_channels = 2;
mat ref_channels(ref_num_samples,ref_num_channels);
std::string ref_annotation("ITPP reference audio file contains 1004 Hz tone at 8 kHz sampling rate.");
const Audio_Encoding ref_encoding = enc_double;
const int ref_sampling_rate = 8000;
const int ref_tone_frequency = 1004;
Audio_Stream_Description ref_description(ref_encoding,ref_sampling_rate,ref_num_channels);
static
const double tol = 1e-9;
//checkers
void check_sample(double s, double ref)
{
ASSERT_NEAR(ref,s, tol) << "sample test failed." << endl;
}
void check_samples(const vec& s, const vec& ref)
{
ASSERT_EQ(s.length(),ref.length()) <<"check_samples: vector length test failed" << endl;
for(int j = 0; j < s.length(); ++j){
ASSERT_NEAR(ref(j), s(j), tol) <<"check_samples: failed for sample number: "<< j << endl;
}
}
void check_samples(const mat& s, const mat& ref)
{
ASSERT_EQ(s.rows(),ref.rows()) <<"check_samples: matrix rows test failed" << endl;
ASSERT_EQ(s.cols(),ref.cols()) <<"check_samples: matrix columns test failed" << endl;
for(int i = 0; i < s.rows(); ++i)
for(int j = 0; j < s.cols(); ++j){
ASSERT_NEAR(ref(i,j), s(i,j), tol) <<"check_samples: failed for row: "<< i << " column: " << j << endl;
}
}
void check_description(const Audio_Stream_Description d, const Audio_Stream_Description ref)
{
ASSERT_TRUE(is_valid(d)) << "check_description: invalid description" << endl;
ASSERT_TRUE(is_valid(ref)) << "check_description: invalid reference" << endl;
ASSERT_EQ(d.get_encoding(), ref.get_encoding()) << "check_description: encodings mismatch" << endl;
ASSERT_EQ(d.get_sampling_rate(), ref.get_sampling_rate()) << "check_description: sampling rates mismatch" << endl;
ASSERT_EQ(d.get_num_channels(), ref.get_num_channels()) << "check_description: number of channels mismatch" << endl;
ASSERT_EQ(d.get_description(), ref.get_description()) << "check_description: annotations mismatch" << endl;
}
//base class for AudioFile tests
class AudioFileTest : public ::testing::Test {
protected:
static void SetUpTestCase() {
//generate reference tone
for(int i = 0; i < ref_num_samples; ++i){
ref_channels(i,0) = Audio_Sample<ref_encoding>::decode(Audio_Sample<ref_encoding>::encode(sin(2*pi*ref_tone_frequency/ref_sampling_rate*i)));
ref_channels(i,1) = Audio_Sample<ref_encoding>::decode(Audio_Sample<ref_encoding>::encode(cos(2*pi*ref_tone_frequency/ref_sampling_rate*i)));
}
ref_description.set_description(ref_annotation.c_str());
#ifdef SAVE_DATA
Audio_Stream_Description d(ref_encoding,ref_sampling_rate,ref_num_channels);
d.set_description(ref_annotation.c_str());
SND_Out_File ref(ref_file_name.c_str(),d);
ref.write(ref_channels);
#endif
}
};
//read test with reference file (refence file should be audible with .au files player (e.g. audacity))
TEST_F(AudioFileTest, In)
{
SND_In_File ref(ref_file_name.c_str());
check_description(ref.get_description(),ref_description);
ASSERT_EQ(ref.num_samples(),ref_num_samples) << "Unexpected number of samples" <<endl;
//read all data from stream
mat m = ref.read((int)ref.num_samples());
check_samples(m,ref_channels);
//test positioning and sample-wise reads - read sample numbwer 500 from channel 0;
ASSERT_TRUE(ref.seek_read(500)) << "Seek failed" << endl;
double s;
ASSERT_TRUE(ref.read_sample(s,0)) << "Read failed" << endl;
check_sample(s,ref_channels(500,0));
//test channel-wise reads - read 200 samples from channel 1 starting from sample 501;
vec v = ref.read_channel(200,1);
check_samples(v,ref_channels.get_col(1)(501,700));
}
//write test
TEST_F(AudioFileTest, Out)
{
SND_Out_File f_out("itpp_test.au",ref_description);
//write single sample
ASSERT_TRUE(f_out.write_sample(1.0,0)) << "Write failed" << endl;
ASSERT_TRUE(f_out.seek_write(0)) << "Seek failed" << endl;
ASSERT_TRUE(f_out.write_sample(0.5,1)) << "Write failed" << endl;
ASSERT_EQ(f_out.num_samples(),1)<< "Unexpected number of samples" <<endl;
//write vector
ASSERT_TRUE(f_out.seek_write(0)) << "Seek failed" << endl;
vec ch0 = zeros(100);
vec ch1 = 0.5*ones(100);
ASSERT_TRUE(f_out.write_channel(ch0,0)) << "Write failed" << endl;
ASSERT_TRUE(f_out.seek_write(0)) << "Seek failed" << endl;
ASSERT_TRUE(f_out.write_channel(ch1,1)) << "Write failed" << endl;
ASSERT_EQ(f_out.num_samples(),100)<< "Unexpected number of samples" <<endl;
//write matrix
ASSERT_TRUE(f_out.seek_write(0)) << "Seek failed" << endl;
ASSERT_TRUE(f_out.write(ref_channels)) << "Write failed" << endl;
ASSERT_EQ(f_out.num_samples(),ref_num_samples)<< "Unexpected number of samples" <<endl;
}
//test interleaved i/o with the audio stream
TEST_F(AudioFileTest, InOut)
{
SND_IO_File f("itpp_test.au");
check_description(f.get_description(),ref_description);
ASSERT_EQ(f.num_samples(),ref_num_samples) << "Unexpected number of samples" <<endl;
//read all data from stream
mat m = f.read((int)f.num_samples());
check_samples(m,ref_channels);
//write and read single sample from position 10 of channel 1
double s_ref = 0.5, s;
ASSERT_TRUE(f.seek_write(10)) << "Seek failed" << endl;
ASSERT_TRUE(f.write_sample(s_ref,1)) << "Write failed" << endl;
ASSERT_TRUE(f.seek_read(10)) << "Seek failed" << endl;
ASSERT_TRUE(f.read_sample(s,1)) << "Read failed" << endl;
check_sample(s,s_ref);
//write and read 100 samples from position 50 of channel 0
vec v_ref = zeros(100);
ASSERT_TRUE(f.seek_write(50)) << "Seek failed" << endl;
ASSERT_TRUE(f.write_channel(v_ref,1)) << "Write failed" << endl;
ASSERT_TRUE(f.seek_read(50)) << "Seek failed" << endl;
vec v = f.read_channel(100,1);
check_samples(v,v_ref);
//write from and read to the matrix (position 150, length 10)
mat m_ref = ref_channels.get(150,159,0,1);
ASSERT_TRUE(f.seek_write(150)) << "Seek failed" << endl;
ASSERT_TRUE(f.write(m_ref)) << "Write failed" << endl;
ASSERT_TRUE(f.seek_read(150)) << "Seek failed" << endl;
m = f.read(10);
check_samples(m,m_ref);
}
|
