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
15extern "C" {
16#include "webrtc/common_audio/vad/vad_gmm.h"
17}
18
19namespace {
20
21TEST_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