1 /*
2 * Copyright (c) 2011 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 "testing/gtest/include/gtest/gtest.h"
12 #include "webrtc/common_audio/vad/vad_unittest.h"
13 #include "webrtc/typedefs.h"
14
15 extern "C" {
16 #include "webrtc/common_audio/vad/vad_gmm.h"
17 }
18
19 namespace {
20
TEST_F(VadTest,vad_gmm)21 TEST_F(VadTest, vad_gmm) {
22 int16_t delta = 0;
23 // Input value at mean.
24 EXPECT_EQ(1048576, WebRtcVad_GaussianProbability(0, 0, 128, &delta));
25 EXPECT_EQ(0, delta);
26 EXPECT_EQ(1048576, WebRtcVad_GaussianProbability(16, 128, 128, &delta));
27 EXPECT_EQ(0, delta);
28 EXPECT_EQ(1048576, WebRtcVad_GaussianProbability(-16, -128, 128, &delta));
29 EXPECT_EQ(0, delta);
30
31 // Largest possible input to give non-zero probability.
32 EXPECT_EQ(1024, WebRtcVad_GaussianProbability(59, 0, 128, &delta));
33 EXPECT_EQ(7552, delta);
34 EXPECT_EQ(1024, WebRtcVad_GaussianProbability(75, 128, 128, &delta));
35 EXPECT_EQ(7552, delta);
36 EXPECT_EQ(1024, WebRtcVad_GaussianProbability(-75, -128, 128, &delta));
37 EXPECT_EQ(-7552, delta);
38
39 // Too large input, should give zero probability.
40 EXPECT_EQ(0, WebRtcVad_GaussianProbability(105, 0, 128, &delta));
41 EXPECT_EQ(13440, delta);
42 }
43 } // namespace
44