1 /*
2 * Copyright (c) 2016 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 "modules/audio_mixer/audio_frame_manipulator.h"
12
13 #include <algorithm>
14
15 #include "test/gtest.h"
16
17 namespace webrtc {
18 namespace {
19
FillFrameWithConstants(size_t samples_per_channel,size_t number_of_channels,int16_t value,AudioFrame * frame)20 void FillFrameWithConstants(size_t samples_per_channel,
21 size_t number_of_channels,
22 int16_t value,
23 AudioFrame* frame) {
24 frame->num_channels_ = number_of_channels;
25 frame->samples_per_channel_ = samples_per_channel;
26 int16_t* frame_data = frame->mutable_data();
27 std::fill(frame_data, frame_data + samples_per_channel * number_of_channels,
28 value);
29 }
30 } // namespace
31
TEST(AudioFrameManipulator,CompareForwardRampWithExpectedResultStereo)32 TEST(AudioFrameManipulator, CompareForwardRampWithExpectedResultStereo) {
33 constexpr int kSamplesPerChannel = 5;
34 constexpr int kNumberOfChannels = 2;
35
36 // Create a frame with values 5, 5, 5, ... and channels & samples as above.
37 AudioFrame frame;
38 FillFrameWithConstants(kSamplesPerChannel, kNumberOfChannels, 5, &frame);
39
40 Ramp(0.0f, 1.0f, &frame);
41
42 const int total_samples = kSamplesPerChannel * kNumberOfChannels;
43 const int16_t expected_result[total_samples] = {0, 0, 1, 1, 2, 2, 3, 3, 4, 4};
44 const int16_t* frame_data = frame.data();
45 EXPECT_TRUE(
46 std::equal(frame_data, frame_data + total_samples, expected_result));
47 }
48
TEST(AudioFrameManipulator,CompareBackwardRampWithExpectedResultMono)49 TEST(AudioFrameManipulator, CompareBackwardRampWithExpectedResultMono) {
50 constexpr int kSamplesPerChannel = 5;
51 constexpr int kNumberOfChannels = 1;
52
53 // Create a frame with values 5, 5, 5, ... and channels & samples as above.
54 AudioFrame frame;
55 FillFrameWithConstants(kSamplesPerChannel, kNumberOfChannels, 5, &frame);
56
57 Ramp(1.0f, 0.0f, &frame);
58
59 const int total_samples = kSamplesPerChannel * kNumberOfChannels;
60 const int16_t expected_result[total_samples] = {5, 4, 3, 2, 1};
61 const int16_t* frame_data = frame.data();
62 EXPECT_TRUE(
63 std::equal(frame_data, frame_data + total_samples, expected_result));
64 }
65
66 } // namespace webrtc
67