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 #include <stdlib.h>
12
13 #include "common_audio/vad/vad_unittest.h"
14 #include "test/gtest.h"
15 #include "typedefs.h" // NOLINT(build/include)
16
17 extern "C" {
18 #include "common_audio/vad/vad_core.h"
19 #include "common_audio/vad/vad_sp.h"
20 }
21
22 namespace webrtc {
23 namespace test {
24
TEST_F(VadTest,vad_sp)25 TEST_F(VadTest, vad_sp) {
26 VadInstT* self = reinterpret_cast<VadInstT*>(malloc(sizeof(VadInstT)));
27 const size_t kMaxFrameLenSp = 960; // Maximum frame length in this unittest.
28 int16_t zeros[kMaxFrameLenSp] = { 0 };
29 int32_t state[2] = { 0 };
30 int16_t data_in[kMaxFrameLenSp];
31 int16_t data_out[kMaxFrameLenSp];
32
33 // We expect the first value to be 1600 as long as |frame_counter| is zero,
34 // which is true for the first iteration.
35 static const int16_t kReferenceMin[32] = {
36 1600, 720, 509, 512, 532, 552, 570, 588,
37 606, 624, 642, 659, 675, 691, 707, 723,
38 1600, 544, 502, 522, 542, 561, 579, 597,
39 615, 633, 651, 667, 683, 699, 715, 731
40 };
41
42 // Construct a speech signal that will trigger the VAD in all modes. It is
43 // known that (i * i) will wrap around, but that doesn't matter in this case.
44 for (size_t i = 0; i < kMaxFrameLenSp; ++i) {
45 data_in[i] = static_cast<int16_t>(i * i);
46 }
47 // Input values all zeros, expect all zeros out.
48 WebRtcVad_Downsampling(zeros, data_out, state, kMaxFrameLenSp);
49 EXPECT_EQ(0, state[0]);
50 EXPECT_EQ(0, state[1]);
51 for (size_t i = 0; i < kMaxFrameLenSp / 2; ++i) {
52 EXPECT_EQ(0, data_out[i]);
53 }
54 // Make a simple non-zero data test.
55 WebRtcVad_Downsampling(data_in, data_out, state, kMaxFrameLenSp);
56 EXPECT_EQ(207, state[0]);
57 EXPECT_EQ(2270, state[1]);
58
59 ASSERT_EQ(0, WebRtcVad_InitCore(self));
60 // TODO(bjornv): Replace this part of the test with taking values from an
61 // array and calculate the reference value here. Make sure the values are not
62 // ordered.
63 for (int16_t i = 0; i < 16; ++i) {
64 int16_t value = 500 * (i + 1);
65 for (int j = 0; j < kNumChannels; ++j) {
66 // Use values both above and below initialized value.
67 EXPECT_EQ(kReferenceMin[i], WebRtcVad_FindMinimum(self, value, j));
68 EXPECT_EQ(kReferenceMin[i + 16], WebRtcVad_FindMinimum(self, 12000, j));
69 }
70 self->frame_counter++;
71 }
72
73 free(self);
74 }
75 } // namespace test
76 } // namespace webrtc
77