1 /* 2 * Copyright (c) 2013 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/include/audio_util.h" 13 #include "webrtc/typedefs.h" 14 15 namespace webrtc { 16 17 void ExpectArraysEq(const int16_t* ref, const int16_t* test, int length) { 18 for (int i = 0; i < length; ++i) { 19 EXPECT_EQ(ref[i], test[i]); 20 } 21 } 22 23 void ExpectArraysEq(const float* ref, const float* test, int length) { 24 for (int i = 0; i < length; ++i) { 25 EXPECT_FLOAT_EQ(ref[i], test[i]); 26 } 27 } 28 29 TEST(AudioUtilTest, FloatToS16) { 30 const int kSize = 9; 31 const float kInput[kSize] = { 32 0.f, 0.4f / 32767.f, 0.6f / 32767.f, -0.4f / 32768.f, -0.6f / 32768.f, 33 1.f, -1.f, 1.1f, -1.1f}; 34 const int16_t kReference[kSize] = { 35 0, 0, 1, 0, -1, 32767, -32768, 32767, -32768}; 36 int16_t output[kSize]; 37 FloatToS16(kInput, kSize, output); 38 ExpectArraysEq(kReference, output, kSize); 39 } 40 41 TEST(AudioUtilTest, S16ToFloat) { 42 const int kSize = 7; 43 const int16_t kInput[kSize] = {0, 1, -1, 16384, -16384, 32767, -32768}; 44 const float kReference[kSize] = { 45 0.f, 1.f / 32767.f, -1.f / 32768.f, 16384.f / 32767.f, -0.5f, 1.f, -1.f}; 46 float output[kSize]; 47 S16ToFloat(kInput, kSize, output); 48 ExpectArraysEq(kReference, output, kSize); 49 } 50 51 TEST(AudioUtilTest, FloatS16ToS16) { 52 const int kSize = 7; 53 const float kInput[kSize] = { 54 0.f, 0.4f, 0.5f, -0.4f, -0.5f, 32768.f, -32769.f}; 55 const int16_t kReference[kSize] = {0, 0, 1, 0, -1, 32767, -32768}; 56 int16_t output[kSize]; 57 FloatS16ToS16(kInput, kSize, output); 58 ExpectArraysEq(kReference, output, kSize); 59 } 60 61 TEST(AudioUtilTest, FloatToFloatS16) { 62 const int kSize = 9; 63 const float kInput[kSize] = { 64 0.f, 0.4f / 32767.f, 0.6f / 32767.f, -0.4f / 32768.f, -0.6f / 32768.f, 65 1.f, -1.f, 1.1f, -1.1f}; 66 const float kReference[kSize] = { 67 0.f, 0.4f, 0.6f, -0.4f, -0.6f, 32767.f, -32768.f, 36043.7f, -36044.8f}; 68 float output[kSize]; 69 FloatToFloatS16(kInput, kSize, output); 70 ExpectArraysEq(kReference, output, kSize); 71 } 72 73 TEST(AudioUtilTest, FloatS16ToFloat) { 74 const int kSize = 9; 75 const float kInput[kSize] = { 76 0.f, 0.4f, 0.6f, -0.4f, -0.6f, 32767.f, -32768.f, 36043.7f, -36044.8f}; 77 const float kReference[kSize] = { 78 0.f, 0.4f / 32767.f, 0.6f / 32767.f, -0.4f / 32768.f, -0.6f / 32768.f, 79 1.f, -1.f, 1.1f, -1.1f}; 80 float output[kSize]; 81 FloatS16ToFloat(kInput, kSize, output); 82 ExpectArraysEq(kReference, output, kSize); 83 } 84 85 TEST(AudioUtilTest, InterleavingStereo) { serializeboost::graph::distributed::hohberg_detail::path_header86 const int16_t kInterleaved[] = {2, 3, 4, 9, 8, 27, 16, 81}; 87 const int kSamplesPerChannel = 4; 88 const int kNumChannels = 2; 89 const int kLength = kSamplesPerChannel * kNumChannels; 90 int16_t left[kSamplesPerChannel], right[kSamplesPerChannel]; 91 int16_t* deinterleaved[] = {left, right}; 92 Deinterleave(kInterleaved, kSamplesPerChannel, kNumChannels, deinterleaved); 93 const int16_t kRefLeft[] = {2, 4, 8, 16}; 94 const int16_t kRefRight[] = {3, 9, 27, 81}; 95 ExpectArraysEq(kRefLeft, left, kSamplesPerChannel); 96 ExpectArraysEq(kRefRight, right, kSamplesPerChannel); 97 98 int16_t interleaved[kLength]; 99 Interleave(deinterleaved, kSamplesPerChannel, kNumChannels, interleaved); 100 ExpectArraysEq(kInterleaved, interleaved, kLength); 101 } 102 103 TEST(AudioUtilTest, InterleavingMonoIsIdentical) { 104 const int16_t kInterleaved[] = {1, 2, 3, 4, 5}; 105 const int kSamplesPerChannel = 5; 106 const int kNumChannels = 1; 107 int16_t mono[kSamplesPerChannel]; serializeboost::graph::distributed::hohberg_detail::tree_header108 int16_t* deinterleaved[] = {mono}; 109 Deinterleave(kInterleaved, kSamplesPerChannel, kNumChannels, deinterleaved); 110 ExpectArraysEq(kInterleaved, mono, kSamplesPerChannel); 111 112 int16_t interleaved[kSamplesPerChannel]; 113 Interleave(deinterleaved, kSamplesPerChannel, kNumChannels, interleaved); 114 ExpectArraysEq(mono, interleaved, kSamplesPerChannel); 115 } 116 117 } // namespace webrtc 118