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_coding/neteq/dsp_helper.h" 12 13 #include "testing/gtest/include/gtest/gtest.h" 14 #include "webrtc/modules/audio_coding/neteq/audio_multi_vector.h" 15 #include "webrtc/typedefs.h" 16 17 namespace webrtc { 18 19 TEST(DspHelper, RampSignalArray) { 20 static const int kLen = 100; 21 int16_t input[kLen]; 22 int16_t output[kLen]; 23 // Fill input with 1000. 24 for (int i = 0; i < kLen; ++i) { 25 input[i] = 1000; 26 } 27 int start_factor = 0; 28 // Ramp from 0 to 1 (in Q14) over the array. Note that |increment| is in Q20, 29 // while the factor is in Q14, hence the shift by 6. 30 int increment = (16384 << 6) / kLen; 31 32 // Test first method. 33 int stop_factor = DspHelper::RampSignal(input, kLen, start_factor, increment, 34 output); 35 EXPECT_EQ(16383, stop_factor); // Almost reach 1 in Q14. 36 for (int i = 0; i < kLen; ++i) { 37 EXPECT_EQ(1000 * i / kLen, output[i]); 38 } 39 40 // Test second method. (Note that this modifies |input|.) 41 stop_factor = DspHelper::RampSignal(input, kLen, start_factor, increment); 42 EXPECT_EQ(16383, stop_factor); // Almost reach 1 in Q14. 43 for (int i = 0; i < kLen; ++i) { 44 EXPECT_EQ(1000 * i / kLen, input[i]); 45 } 46 } 47 48 TEST(DspHelper, RampSignalAudioMultiVector) { 49 static const int kLen = 100; 50 static const int kChannels = 5; 51 AudioMultiVector input(kChannels, kLen * 3); 52 // Fill input with 1000. 53 for (int i = 0; i < kLen * 3; ++i) { 54 for (int channel = 0; channel < kChannels; ++channel) { 55 input[channel][i] = 1000; 56 } 57 } 58 // We want to start ramping at |start_index| and keep ramping for |kLen| 59 // samples. 60 int start_index = kLen; 61 int start_factor = 0; 62 // Ramp from 0 to 1 (in Q14) in |kLen| samples. Note that |increment| is in 63 // Q20, while the factor is in Q14, hence the shift by 6. 64 int increment = (16384 << 6) / kLen; 65 66 int stop_factor = DspHelper::RampSignal(&input, start_index, kLen, 67 start_factor, increment); 68 EXPECT_EQ(16383, stop_factor); // Almost reach 1 in Q14. 69 // Verify that the first |kLen| samples are left untouched. 70 int i; 71 for (i = 0; i < kLen; ++i) { 72 for (int channel = 0; channel < kChannels; ++channel) { 73 EXPECT_EQ(1000, input[channel][i]); 74 } 75 } 76 // Verify that the next block of |kLen| samples are ramped. 77 for (; i < 2 * kLen; ++i) { 78 for (int channel = 0; channel < kChannels; ++channel) { 79 EXPECT_EQ(1000 * (i - kLen) / kLen, input[channel][i]); 80 } 81 } 82 // Verify the last |kLen| samples are left untouched. 83 for (; i < 3 * kLen; ++i) { 84 for (int channel = 0; channel < kChannels; ++channel) { 85 EXPECT_EQ(1000, input[channel][i]); 86 } 87 } 88 } 89 } // namespace webrtc 90
