andrew@webrtc.org | a7b57da | 2012-10-22 18:19:23 +0000 | [diff] [blame] | 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 | |
pbos@webrtc.org | fab7ea2 | 2013-07-12 08:28:10 +0000 | [diff] [blame] | 11 | #include "testing/gtest/include/gtest/gtest.h" |
andrew@webrtc.org | a7b57da | 2012-10-22 18:19:23 +0000 | [diff] [blame] | 12 | |
pbos@webrtc.org | fab7ea2 | 2013-07-12 08:28:10 +0000 | [diff] [blame] | 13 | #include "webrtc/modules/interface/module_common_types.h" |
| 14 | #include "webrtc/modules/utility/interface/audio_frame_operations.h" |
andrew@webrtc.org | a7b57da | 2012-10-22 18:19:23 +0000 | [diff] [blame] | 15 | |
| 16 | namespace webrtc { |
| 17 | namespace { |
| 18 | |
| 19 | class AudioFrameOperationsTest : public ::testing::Test { |
| 20 | protected: |
| 21 | AudioFrameOperationsTest() { |
| 22 | // Set typical values. |
| 23 | frame_.samples_per_channel_ = 320; |
| 24 | frame_.num_channels_ = 2; |
| 25 | } |
| 26 | |
| 27 | AudioFrame frame_; |
| 28 | }; |
| 29 | |
| 30 | void SetFrameData(AudioFrame* frame, int16_t left, int16_t right) { |
| 31 | for (int i = 0; i < frame->samples_per_channel_ * 2; i += 2) { |
| 32 | frame->data_[i] = left; |
| 33 | frame->data_[i + 1] = right; |
| 34 | } |
| 35 | } |
| 36 | |
| 37 | void SetFrameData(AudioFrame* frame, int16_t data) { |
| 38 | for (int i = 0; i < frame->samples_per_channel_; i++) { |
| 39 | frame->data_[i] = data; |
| 40 | } |
| 41 | } |
| 42 | |
| 43 | void VerifyFramesAreEqual(const AudioFrame& frame1, const AudioFrame& frame2) { |
| 44 | EXPECT_EQ(frame1.num_channels_, frame2.num_channels_); |
| 45 | EXPECT_EQ(frame1.samples_per_channel_, |
| 46 | frame2.samples_per_channel_); |
| 47 | |
| 48 | for (int i = 0; i < frame1.samples_per_channel_ * frame1.num_channels_; |
| 49 | i++) { |
| 50 | EXPECT_EQ(frame1.data_[i], frame2.data_[i]); |
| 51 | } |
| 52 | } |
| 53 | |
| 54 | TEST_F(AudioFrameOperationsTest, MonoToStereoFailsWithBadParameters) { |
| 55 | EXPECT_EQ(-1, AudioFrameOperations::MonoToStereo(&frame_)); |
| 56 | |
| 57 | frame_.samples_per_channel_ = AudioFrame::kMaxDataSizeSamples; |
| 58 | frame_.num_channels_ = 1; |
| 59 | EXPECT_EQ(-1, AudioFrameOperations::MonoToStereo(&frame_)); |
| 60 | } |
| 61 | |
| 62 | TEST_F(AudioFrameOperationsTest, MonoToStereoSucceeds) { |
| 63 | frame_.num_channels_ = 1; |
| 64 | SetFrameData(&frame_, 1); |
andrew@webrtc.org | 4e629ff | 2013-01-22 04:44:30 +0000 | [diff] [blame] | 65 | AudioFrame temp_frame; |
| 66 | temp_frame.CopyFrom(frame_); |
andrew@webrtc.org | a7b57da | 2012-10-22 18:19:23 +0000 | [diff] [blame] | 67 | EXPECT_EQ(0, AudioFrameOperations::MonoToStereo(&frame_)); |
| 68 | |
| 69 | AudioFrame stereo_frame; |
| 70 | stereo_frame.samples_per_channel_ = 320; |
| 71 | stereo_frame.num_channels_ = 2; |
| 72 | SetFrameData(&stereo_frame, 1, 1); |
| 73 | VerifyFramesAreEqual(stereo_frame, frame_); |
| 74 | |
| 75 | SetFrameData(&frame_, 0); |
| 76 | AudioFrameOperations::MonoToStereo(temp_frame.data_, |
| 77 | frame_.samples_per_channel_, |
| 78 | frame_.data_); |
| 79 | frame_.num_channels_ = 2; // Need to set manually. |
| 80 | VerifyFramesAreEqual(stereo_frame, frame_); |
| 81 | } |
| 82 | |
| 83 | TEST_F(AudioFrameOperationsTest, StereoToMonoFailsWithBadParameters) { |
| 84 | frame_.num_channels_ = 1; |
| 85 | EXPECT_EQ(-1, AudioFrameOperations::StereoToMono(&frame_)); |
| 86 | } |
| 87 | |
| 88 | TEST_F(AudioFrameOperationsTest, StereoToMonoSucceeds) { |
| 89 | SetFrameData(&frame_, 4, 2); |
andrew@webrtc.org | 4e629ff | 2013-01-22 04:44:30 +0000 | [diff] [blame] | 90 | AudioFrame temp_frame; |
| 91 | temp_frame.CopyFrom(frame_); |
andrew@webrtc.org | a7b57da | 2012-10-22 18:19:23 +0000 | [diff] [blame] | 92 | EXPECT_EQ(0, AudioFrameOperations::StereoToMono(&frame_)); |
| 93 | |
| 94 | AudioFrame mono_frame; |
| 95 | mono_frame.samples_per_channel_ = 320; |
| 96 | mono_frame.num_channels_ = 1; |
| 97 | SetFrameData(&mono_frame, 3); |
| 98 | VerifyFramesAreEqual(mono_frame, frame_); |
| 99 | |
| 100 | SetFrameData(&frame_, 0); |
| 101 | AudioFrameOperations::StereoToMono(temp_frame.data_, |
| 102 | frame_.samples_per_channel_, |
| 103 | frame_.data_); |
| 104 | frame_.num_channels_ = 1; // Need to set manually. |
| 105 | VerifyFramesAreEqual(mono_frame, frame_); |
| 106 | } |
| 107 | |
| 108 | TEST_F(AudioFrameOperationsTest, StereoToMonoDoesNotWrapAround) { |
| 109 | SetFrameData(&frame_, -32768, -32768); |
| 110 | EXPECT_EQ(0, AudioFrameOperations::StereoToMono(&frame_)); |
| 111 | |
| 112 | AudioFrame mono_frame; |
| 113 | mono_frame.samples_per_channel_ = 320; |
| 114 | mono_frame.num_channels_ = 1; |
| 115 | SetFrameData(&mono_frame, -32768); |
| 116 | VerifyFramesAreEqual(mono_frame, frame_); |
| 117 | } |
| 118 | |
| 119 | TEST_F(AudioFrameOperationsTest, SwapStereoChannelsSucceedsOnStereo) { |
| 120 | SetFrameData(&frame_, 0, 1); |
| 121 | |
| 122 | AudioFrame swapped_frame; |
| 123 | swapped_frame.samples_per_channel_ = 320; |
| 124 | swapped_frame.num_channels_ = 2; |
| 125 | SetFrameData(&swapped_frame, 1, 0); |
| 126 | |
| 127 | AudioFrameOperations::SwapStereoChannels(&frame_); |
| 128 | VerifyFramesAreEqual(swapped_frame, frame_); |
| 129 | } |
| 130 | |
| 131 | TEST_F(AudioFrameOperationsTest, SwapStereoChannelsFailsOnMono) { |
| 132 | frame_.num_channels_ = 1; |
| 133 | // Set data to "stereo", despite it being a mono frame. |
| 134 | SetFrameData(&frame_, 0, 1); |
| 135 | |
andrew@webrtc.org | 4e629ff | 2013-01-22 04:44:30 +0000 | [diff] [blame] | 136 | AudioFrame orig_frame; |
| 137 | orig_frame.CopyFrom(frame_); |
andrew@webrtc.org | a7b57da | 2012-10-22 18:19:23 +0000 | [diff] [blame] | 138 | AudioFrameOperations::SwapStereoChannels(&frame_); |
| 139 | // Verify that no swap occurred. |
| 140 | VerifyFramesAreEqual(orig_frame, frame_); |
| 141 | } |
| 142 | |
| 143 | TEST_F(AudioFrameOperationsTest, MuteSucceeds) { |
| 144 | SetFrameData(&frame_, 1000, 1000); |
andrew@webrtc.org | a7b57da | 2012-10-22 18:19:23 +0000 | [diff] [blame] | 145 | AudioFrameOperations::Mute(frame_); |
| 146 | |
| 147 | AudioFrame muted_frame; |
| 148 | muted_frame.samples_per_channel_ = 320; |
| 149 | muted_frame.num_channels_ = 2; |
| 150 | SetFrameData(&muted_frame, 0, 0); |
andrew@webrtc.org | a7b57da | 2012-10-22 18:19:23 +0000 | [diff] [blame] | 151 | VerifyFramesAreEqual(muted_frame, frame_); |
andrew@webrtc.org | a7b57da | 2012-10-22 18:19:23 +0000 | [diff] [blame] | 152 | } |
| 153 | |
| 154 | // TODO(andrew): should not allow negative scales. |
| 155 | TEST_F(AudioFrameOperationsTest, DISABLED_ScaleFailsWithBadParameters) { |
| 156 | frame_.num_channels_ = 1; |
| 157 | EXPECT_EQ(-1, AudioFrameOperations::Scale(1.0, 1.0, frame_)); |
| 158 | |
| 159 | frame_.num_channels_ = 3; |
| 160 | EXPECT_EQ(-1, AudioFrameOperations::Scale(1.0, 1.0, frame_)); |
| 161 | |
| 162 | frame_.num_channels_ = 2; |
| 163 | EXPECT_EQ(-1, AudioFrameOperations::Scale(-1.0, 1.0, frame_)); |
| 164 | EXPECT_EQ(-1, AudioFrameOperations::Scale(1.0, -1.0, frame_)); |
| 165 | } |
| 166 | |
| 167 | // TODO(andrew): fix the wraparound bug. We should always saturate. |
| 168 | TEST_F(AudioFrameOperationsTest, DISABLED_ScaleDoesNotWrapAround) { |
| 169 | SetFrameData(&frame_, 4000, -4000); |
| 170 | EXPECT_EQ(0, AudioFrameOperations::Scale(10.0, 10.0, frame_)); |
| 171 | |
| 172 | AudioFrame clipped_frame; |
| 173 | clipped_frame.samples_per_channel_ = 320; |
| 174 | clipped_frame.num_channels_ = 2; |
| 175 | SetFrameData(&clipped_frame, 32767, -32768); |
| 176 | VerifyFramesAreEqual(clipped_frame, frame_); |
| 177 | } |
| 178 | |
| 179 | TEST_F(AudioFrameOperationsTest, ScaleSucceeds) { |
| 180 | SetFrameData(&frame_, 1, -1); |
| 181 | EXPECT_EQ(0, AudioFrameOperations::Scale(2.0, 3.0, frame_)); |
| 182 | |
| 183 | AudioFrame scaled_frame; |
| 184 | scaled_frame.samples_per_channel_ = 320; |
| 185 | scaled_frame.num_channels_ = 2; |
| 186 | SetFrameData(&scaled_frame, 2, -3); |
| 187 | VerifyFramesAreEqual(scaled_frame, frame_); |
| 188 | } |
| 189 | |
| 190 | // TODO(andrew): should fail with a negative scale. |
| 191 | TEST_F(AudioFrameOperationsTest, DISABLED_ScaleWithSatFailsWithBadParameters) { |
| 192 | EXPECT_EQ(-1, AudioFrameOperations::ScaleWithSat(-1.0, frame_)); |
| 193 | } |
| 194 | |
| 195 | TEST_F(AudioFrameOperationsTest, ScaleWithSatDoesNotWrapAround) { |
| 196 | frame_.num_channels_ = 1; |
| 197 | SetFrameData(&frame_, 4000); |
| 198 | EXPECT_EQ(0, AudioFrameOperations::ScaleWithSat(10.0, frame_)); |
| 199 | |
| 200 | AudioFrame clipped_frame; |
| 201 | clipped_frame.samples_per_channel_ = 320; |
| 202 | clipped_frame.num_channels_ = 1; |
| 203 | SetFrameData(&clipped_frame, 32767); |
| 204 | VerifyFramesAreEqual(clipped_frame, frame_); |
| 205 | |
| 206 | SetFrameData(&frame_, -4000); |
| 207 | EXPECT_EQ(0, AudioFrameOperations::ScaleWithSat(10.0, frame_)); |
| 208 | SetFrameData(&clipped_frame, -32768); |
| 209 | VerifyFramesAreEqual(clipped_frame, frame_); |
| 210 | } |
| 211 | |
| 212 | TEST_F(AudioFrameOperationsTest, ScaleWithSatSucceeds) { |
| 213 | frame_.num_channels_ = 1; |
| 214 | SetFrameData(&frame_, 1); |
| 215 | EXPECT_EQ(0, AudioFrameOperations::ScaleWithSat(2.0, frame_)); |
| 216 | |
| 217 | AudioFrame scaled_frame; |
| 218 | scaled_frame.samples_per_channel_ = 320; |
| 219 | scaled_frame.num_channels_ = 1; |
| 220 | SetFrameData(&scaled_frame, 2); |
| 221 | VerifyFramesAreEqual(scaled_frame, frame_); |
| 222 | } |
| 223 | |
| 224 | } // namespace |
| 225 | } // namespace webrtc |