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
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
|
/*
* 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.
*/
// MSVC++ requires this to be set before any other includes to get M_PI.
#define _USE_MATH_DEFINES
#include "common_audio/wav_file.h"
#include <cmath>
#include <limits>
#include "common_audio/wav_header.h"
#include "test/gtest.h"
#include "test/testsupport/file_utils.h"
// WavWriterTest.CPP flaky on Mac. See webrtc:9247.
#if defined(WEBRTC_MAC)
#define MAYBE_CPP DISABLED_CPP
#define MAYBE_CPPReset DISABLED_CPPReset
#else
#define MAYBE_CPP CPP
#define MAYBE_CPPReset CPPReset
#endif
namespace webrtc {
static const float kSamples[] = {0.0, 10.0, 4e4, -1e9};
// Write a tiny WAV file with the C++ interface and verify the result.
TEST(WavWriterTest, MAYBE_CPP) {
const std::string outfile = test::OutputPath() + "wavtest1.wav";
static const size_t kNumSamples = 3;
{
WavWriter w(outfile, 14099, 1);
EXPECT_EQ(14099, w.sample_rate());
EXPECT_EQ(1u, w.num_channels());
EXPECT_EQ(0u, w.num_samples());
w.WriteSamples(kSamples, kNumSamples);
EXPECT_EQ(kNumSamples, w.num_samples());
}
// Write some extra "metadata" to the file that should be silently ignored
// by WavReader. We don't use WavWriter directly for this because it doesn't
// support metadata.
static const uint8_t kMetadata[] = {101, 202};
{
FILE* f = fopen(outfile.c_str(), "ab");
ASSERT_TRUE(f);
ASSERT_EQ(1u, fwrite(kMetadata, sizeof(kMetadata), 1, f));
fclose(f);
}
static const uint8_t kExpectedContents[] = {
// clang-format off
// clang formatting doesn't respect inline comments.
'R', 'I', 'F', 'F',
42, 0, 0, 0, // size of whole file - 8: 6 + 44 - 8
'W', 'A', 'V', 'E',
'f', 'm', 't', ' ',
16, 0, 0, 0, // size of fmt block - 8: 24 - 8
1, 0, // format: PCM (1)
1, 0, // channels: 1
0x13, 0x37, 0, 0, // sample rate: 14099
0x26, 0x6e, 0, 0, // byte rate: 2 * 14099
2, 0, // block align: NumChannels * BytesPerSample
16, 0, // bits per sample: 2 * 8
'd', 'a', 't', 'a',
6, 0, 0, 0, // size of payload: 6
0, 0, // first sample: 0.0
10, 0, // second sample: 10.0
0xff, 0x7f, // third sample: 4e4 (saturated)
kMetadata[0], kMetadata[1],
// clang-format on
};
static const size_t kContentSize =
kPcmWavHeaderSize + kNumSamples * sizeof(int16_t) + sizeof(kMetadata);
static_assert(sizeof(kExpectedContents) == kContentSize, "content size");
EXPECT_EQ(kContentSize, test::GetFileSize(outfile));
FILE* f = fopen(outfile.c_str(), "rb");
ASSERT_TRUE(f);
uint8_t contents[kContentSize];
ASSERT_EQ(1u, fread(contents, kContentSize, 1, f));
EXPECT_EQ(0, fclose(f));
EXPECT_EQ(0, memcmp(kExpectedContents, contents, kContentSize));
{
WavReader r(outfile);
EXPECT_EQ(14099, r.sample_rate());
EXPECT_EQ(1u, r.num_channels());
EXPECT_EQ(kNumSamples, r.num_samples());
static const float kTruncatedSamples[] = {0.0, 10.0, 32767.0};
float samples[kNumSamples];
EXPECT_EQ(kNumSamples, r.ReadSamples(kNumSamples, samples));
EXPECT_EQ(0, memcmp(kTruncatedSamples, samples, sizeof(samples)));
EXPECT_EQ(0u, r.ReadSamples(kNumSamples, samples));
}
}
// Write a larger WAV file. You can listen to this file to sanity-check it.
TEST(WavWriterTest, LargeFile) {
constexpr int kSampleRate = 8000;
constexpr size_t kNumChannels = 2;
constexpr size_t kNumSamples = 3 * kSampleRate * kNumChannels;
for (WavFile::SampleFormat wav_format :
{WavFile::SampleFormat::kInt16, WavFile::SampleFormat::kFloat}) {
for (WavFile::SampleFormat write_format :
{WavFile::SampleFormat::kInt16, WavFile::SampleFormat::kFloat}) {
for (WavFile::SampleFormat read_format :
{WavFile::SampleFormat::kInt16, WavFile::SampleFormat::kFloat}) {
std::string outfile = test::OutputPath() + "wavtest3.wav";
float samples[kNumSamples];
for (size_t i = 0; i < kNumSamples; i += kNumChannels) {
// A nice periodic beeping sound.
static const double kToneHz = 440;
const double t =
static_cast<double>(i) / (kNumChannels * kSampleRate);
const double x = std::numeric_limits<int16_t>::max() *
std::sin(t * kToneHz * 2 * M_PI);
samples[i] = std::pow(std::sin(t * 2 * 2 * M_PI), 10) * x;
samples[i + 1] = std::pow(std::cos(t * 2 * 2 * M_PI), 10) * x;
}
{
WavWriter w(outfile, kSampleRate, kNumChannels, wav_format);
EXPECT_EQ(kSampleRate, w.sample_rate());
EXPECT_EQ(kNumChannels, w.num_channels());
EXPECT_EQ(0u, w.num_samples());
if (write_format == WavFile::SampleFormat::kFloat) {
float truncated_samples[kNumSamples];
for (size_t k = 0; k < kNumSamples; ++k) {
truncated_samples[k] = static_cast<int16_t>(samples[k]);
}
w.WriteSamples(truncated_samples, kNumSamples);
} else {
w.WriteSamples(samples, kNumSamples);
}
EXPECT_EQ(kNumSamples, w.num_samples());
}
if (wav_format == WavFile::SampleFormat::kFloat) {
EXPECT_EQ(sizeof(float) * kNumSamples + kIeeeFloatWavHeaderSize,
test::GetFileSize(outfile));
} else {
EXPECT_EQ(sizeof(int16_t) * kNumSamples + kPcmWavHeaderSize,
test::GetFileSize(outfile));
}
{
WavReader r(outfile);
EXPECT_EQ(kSampleRate, r.sample_rate());
EXPECT_EQ(kNumChannels, r.num_channels());
EXPECT_EQ(kNumSamples, r.num_samples());
if (read_format == WavFile::SampleFormat::kFloat) {
float read_samples[kNumSamples];
EXPECT_EQ(kNumSamples, r.ReadSamples(kNumSamples, read_samples));
for (size_t i = 0; i < kNumSamples; ++i) {
EXPECT_NEAR(samples[i], read_samples[i], 1);
}
EXPECT_EQ(0u, r.ReadSamples(kNumSamples, read_samples));
} else {
int16_t read_samples[kNumSamples];
EXPECT_EQ(kNumSamples, r.ReadSamples(kNumSamples, read_samples));
for (size_t i = 0; i < kNumSamples; ++i) {
EXPECT_NEAR(samples[i], static_cast<float>(read_samples[i]), 1);
}
EXPECT_EQ(0u, r.ReadSamples(kNumSamples, read_samples));
}
}
}
}
}
}
// Write a tiny WAV file with the C++ interface then read-reset-read.
TEST(WavReaderTest, MAYBE_CPPReset) {
const std::string outfile = test::OutputPath() + "wavtest4.wav";
static const size_t kNumSamples = 3;
{
WavWriter w(outfile, 14099, 1);
EXPECT_EQ(14099, w.sample_rate());
EXPECT_EQ(1u, w.num_channels());
EXPECT_EQ(0u, w.num_samples());
w.WriteSamples(kSamples, kNumSamples);
EXPECT_EQ(kNumSamples, w.num_samples());
}
// Write some extra "metadata" to the file that should be silently ignored
// by WavReader. We don't use WavWriter directly for this because it doesn't
// support metadata.
static const uint8_t kMetadata[] = {101, 202};
{
FILE* f = fopen(outfile.c_str(), "ab");
ASSERT_TRUE(f);
ASSERT_EQ(1u, fwrite(kMetadata, sizeof(kMetadata), 1, f));
fclose(f);
}
static const uint8_t kExpectedContents[] = {
// clang-format off
// clang formatting doesn't respect inline comments.
'R', 'I', 'F', 'F',
42, 0, 0, 0, // size of whole file - 8: 6 + 44 - 8
'W', 'A', 'V', 'E',
'f', 'm', 't', ' ',
16, 0, 0, 0, // size of fmt block - 8: 24 - 8
1, 0, // format: PCM (1)
1, 0, // channels: 1
0x13, 0x37, 0, 0, // sample rate: 14099
0x26, 0x6e, 0, 0, // byte rate: 2 * 14099
2, 0, // block align: NumChannels * BytesPerSample
16, 0, // bits per sample: 2 * 8
'd', 'a', 't', 'a',
6, 0, 0, 0, // size of payload: 6
0, 0, // first sample: 0.0
10, 0, // second sample: 10.0
0xff, 0x7f, // third sample: 4e4 (saturated)
kMetadata[0], kMetadata[1],
// clang-format on
};
static const size_t kContentSize =
kPcmWavHeaderSize + kNumSamples * sizeof(int16_t) + sizeof(kMetadata);
static_assert(sizeof(kExpectedContents) == kContentSize, "content size");
EXPECT_EQ(kContentSize, test::GetFileSize(outfile));
FILE* f = fopen(outfile.c_str(), "rb");
ASSERT_TRUE(f);
uint8_t contents[kContentSize];
ASSERT_EQ(1u, fread(contents, kContentSize, 1, f));
EXPECT_EQ(0, fclose(f));
EXPECT_EQ(0, memcmp(kExpectedContents, contents, kContentSize));
{
WavReader r(outfile);
EXPECT_EQ(14099, r.sample_rate());
EXPECT_EQ(1u, r.num_channels());
EXPECT_EQ(kNumSamples, r.num_samples());
static const float kTruncatedSamples[] = {0.0, 10.0, 32767.0};
float samples[kNumSamples];
EXPECT_EQ(kNumSamples, r.ReadSamples(kNumSamples, samples));
EXPECT_EQ(0, memcmp(kTruncatedSamples, samples, sizeof(samples)));
EXPECT_EQ(0u, r.ReadSamples(kNumSamples, samples));
r.Reset();
EXPECT_EQ(kNumSamples, r.ReadSamples(kNumSamples, samples));
EXPECT_EQ(0, memcmp(kTruncatedSamples, samples, sizeof(samples)));
EXPECT_EQ(0u, r.ReadSamples(kNumSamples, samples));
}
}
} // namespace webrtc
|
