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| 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 | |
| 11 #include "webrtc/modules/audio_processing/agc/agc.h" | |
| 12 | |
| 13 #include "testing/gmock/include/gmock/gmock.h" | |
| 14 #include "testing/gtest/include/gtest/gtest.h" | |
| 15 | |
| 16 #include "webrtc/modules/include/module_common_types.h" | |
| 17 #include "webrtc/test/testsupport/fileutils.h" | |
| 18 #include "webrtc/tools/agc/test_utils.h" | |
| 19 | |
| 20 using ::testing::_; | |
| 21 using ::testing::AllOf; | |
| 22 using ::testing::AtLeast; | |
| 23 using ::testing::Eq; | |
| 24 using ::testing::Gt; | |
| 25 using ::testing::InSequence; | |
| 26 using ::testing::Lt; | |
| 27 using ::testing::Mock; | |
| 28 using ::testing::SaveArg; | |
| 29 | |
| 30 namespace webrtc { | |
| 31 namespace { | |
| 32 | |
| 33 // The tested values depend on this assumed gain. | |
| 34 const int kMaxGain = 80; | |
| 35 | |
| 36 MATCHER_P(GtPointee, p, "") { return arg > *p; } | |
| 37 MATCHER_P(LtPointee, p, "") { return arg < *p; } | |
| 38 | |
| 39 class AgcChecker { | |
| 40 public: | |
| 41 MOCK_METHOD2(LevelChanged, void(int iterations, int level)); | |
| 42 }; | |
| 43 | |
| 44 class AgcTest : public ::testing::Test { | |
| 45 protected: | |
| 46 AgcTest() | |
| 47 : agc_(), | |
| 48 checker_(), | |
| 49 mic_level_(128) { | |
| 50 } | |
| 51 | |
| 52 // A gain of <= -100 will zero out the signal. | |
| 53 void RunAgc(int iterations, float gain_db) { | |
| 54 FILE* input_file = fopen( | |
| 55 test::ResourcePath("voice_engine/audio_long16", "pcm").c_str(), "rb"); | |
| 56 ASSERT_TRUE(input_file != NULL); | |
| 57 | |
| 58 AudioFrame frame; | |
| 59 frame.sample_rate_hz_ = 16000; | |
| 60 frame.num_channels_ = 1; | |
| 61 frame.samples_per_channel_ = frame.sample_rate_hz_ / 100; | |
| 62 const size_t length = frame.samples_per_channel_ * frame.num_channels_; | |
| 63 | |
| 64 float gain = Db2Linear(gain_db); | |
| 65 if (gain_db <= -100) { | |
| 66 gain = 0; | |
| 67 } | |
| 68 | |
| 69 for (int i = 0; i < iterations; ++i) { | |
| 70 ASSERT_EQ(length, fread(frame.data_, sizeof(int16_t), length, | |
| 71 input_file)); | |
| 72 SimulateMic(kMaxGain, mic_level_, &frame); | |
| 73 ApplyGainLinear(gain, &frame); | |
| 74 ASSERT_GE(agc_.Process(frame), 0); | |
| 75 | |
| 76 int mic_level = agc_.MicLevel(); | |
| 77 if (mic_level != mic_level_) { | |
| 78 printf("mic_level=%d\n", mic_level); | |
| 79 checker_.LevelChanged(i, mic_level); | |
| 80 } | |
| 81 mic_level_ = mic_level; | |
| 82 } | |
| 83 fclose(input_file); | |
| 84 } | |
| 85 | |
| 86 Agc agc_; | |
| 87 AgcChecker checker_; | |
| 88 // Stores mic level between multiple runs of RunAgc in one test. | |
| 89 int mic_level_; | |
| 90 }; | |
| 91 | |
| 92 TEST_F(AgcTest, UpwardsChangeIsLimited) { | |
| 93 { | |
| 94 InSequence seq; | |
| 95 EXPECT_CALL(checker_, LevelChanged(Lt(500), Eq(179))).Times(1); | |
| 96 EXPECT_CALL(checker_, LevelChanged(_, Gt(179))).Times(AtLeast(1)); | |
| 97 } | |
| 98 RunAgc(1000, -40); | |
| 99 } | |
| 100 | |
| 101 TEST_F(AgcTest, DownwardsChangeIsLimited) { | |
| 102 { | |
| 103 InSequence seq; | |
| 104 EXPECT_CALL(checker_, LevelChanged(Lt(500), Eq(77))).Times(1); | |
| 105 EXPECT_CALL(checker_, LevelChanged(_, Lt(77))).Times(AtLeast(1)); | |
| 106 } | |
| 107 RunAgc(1000, 40); | |
| 108 } | |
| 109 | |
| 110 TEST_F(AgcTest, MovesUpToMaxAndDownToMin) { | |
| 111 int last_level = 128; | |
| 112 EXPECT_CALL(checker_, LevelChanged(_, GtPointee(&last_level))) | |
| 113 .Times(AtLeast(2)) | |
| 114 .WillRepeatedly(SaveArg<1>(&last_level)); | |
| 115 RunAgc(1000, -30); | |
| 116 EXPECT_EQ(255, last_level); | |
| 117 Mock::VerifyAndClearExpectations(&checker_); | |
| 118 | |
| 119 EXPECT_CALL(checker_, LevelChanged(_, LtPointee(&last_level))) | |
| 120 .Times(AtLeast(2)) | |
| 121 .WillRepeatedly(SaveArg<1>(&last_level)); | |
| 122 RunAgc(1000, 50); | |
| 123 EXPECT_EQ(1, last_level); | |
| 124 } | |
| 125 | |
| 126 TEST_F(AgcTest, HandlesZeroSignal) { | |
| 127 int last_level = 128; | |
| 128 // Doesn't respond to a zero signal. | |
| 129 EXPECT_CALL(checker_, LevelChanged(_, _)).Times(0); | |
| 130 RunAgc(1000, -100); | |
| 131 Mock::VerifyAndClearExpectations(&checker_); | |
| 132 | |
| 133 // Reacts as usual afterwards. | |
| 134 EXPECT_CALL(checker_, LevelChanged(_, GtPointee(&last_level))) | |
| 135 .Times(AtLeast(2)) | |
| 136 .WillRepeatedly(SaveArg<1>(&last_level)); | |
| 137 RunAgc(500, -20); | |
| 138 } | |
| 139 | |
| 140 TEST_F(AgcTest, ReachesSteadyState) { | |
| 141 int last_level = 128; | |
| 142 EXPECT_CALL(checker_, LevelChanged(_, _)) | |
| 143 .Times(AtLeast(2)) | |
| 144 .WillRepeatedly(SaveArg<1>(&last_level)); | |
| 145 RunAgc(1000, -20); | |
| 146 Mock::VerifyAndClearExpectations(&checker_); | |
| 147 | |
| 148 // If the level changes, it should be in a narrow band around the previous | |
| 149 // adaptation. | |
| 150 EXPECT_CALL(checker_, LevelChanged(_, | |
| 151 AllOf(Gt(last_level * 0.95), Lt(last_level * 1.05)))) | |
| 152 .Times(AtLeast(0)); | |
| 153 RunAgc(1000, -20); | |
| 154 } | |
| 155 | |
| 156 // TODO(ajm): Add this test; requires measuring the signal RMS. | |
| 157 TEST_F(AgcTest, AdaptsToCorrectRMS) { | |
| 158 } | |
| 159 | |
| 160 } // namespace | |
| 161 } // namespace webrtc | |
| 162 | |
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Chromium Code Reviews
Issue 2299023004:
Remove unused agc_unittest.cc and agc_harness.cc (Closed)
