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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include <cmath> | 5 #include <cmath> |
6 | 6 |
7 #include "base/bind.h" | 7 #include "base/bind.h" |
8 #include "base/bind_helpers.h" | 8 #include "base/bind_helpers.h" |
9 #include "base/logging.h" | 9 #include "base/logging.h" |
10 #include "base/memory/scoped_ptr.h" | 10 #include "base/memory/scoped_ptr.h" |
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43 virtual ~MultiChannelResamplerTest() {} | 43 virtual ~MultiChannelResamplerTest() {} |
44 | 44 |
45 void InitializeAudioData(int channels, int frames) { | 45 void InitializeAudioData(int channels, int frames) { |
46 frames_ = frames; | 46 frames_ = frames; |
47 audio_bus_ = AudioBus::Create(channels, frames); | 47 audio_bus_ = AudioBus::Create(channels, frames); |
48 } | 48 } |
49 | 49 |
50 // MultiChannelResampler::MultiChannelAudioSourceProvider implementation, just | 50 // MultiChannelResampler::MultiChannelAudioSourceProvider implementation, just |
51 // fills the provided audio_data with |kFillValue|. | 51 // fills the provided audio_data with |kFillValue|. |
52 virtual void ProvideInput(int frame_delay, AudioBus* audio_bus) { | 52 virtual void ProvideInput(int frame_delay, AudioBus* audio_bus) { |
53 EXPECT_GT(frame_delay, last_frame_delay_); | 53 EXPECT_GE(frame_delay, last_frame_delay_); |
54 last_frame_delay_ = frame_delay; | 54 last_frame_delay_ = frame_delay; |
55 | 55 |
56 float fill_value = fill_junk_values_ ? (1 / kFillValue) : kFillValue; | 56 float fill_value = fill_junk_values_ ? (1 / kFillValue) : kFillValue; |
57 EXPECT_EQ(audio_bus->channels(), audio_bus_->channels()); | 57 EXPECT_EQ(audio_bus->channels(), audio_bus_->channels()); |
58 for (int i = 0; i < audio_bus->channels(); ++i) | 58 for (int i = 0; i < audio_bus->channels(); ++i) |
59 for (int j = 0; j < audio_bus->frames(); ++j) | 59 for (int j = 0; j < audio_bus->frames(); ++j) |
60 audio_bus->channel(i)[j] = fill_value; | 60 audio_bus->channel(i)[j] = fill_value; |
61 } | 61 } |
62 | 62 |
63 void MultiChannelTest(int channels, int frames, double expected_max_rms_error, | 63 void MultiChannelTest(int channels, int frames, double expected_max_rms_error, |
64 double expected_max_error) { | 64 double expected_max_error) { |
65 InitializeAudioData(channels, frames); | 65 InitializeAudioData(channels, frames); |
66 MultiChannelResampler resampler(channels, kScaleFactor, base::Bind( | 66 MultiChannelResampler resampler( |
67 &MultiChannelResamplerTest::ProvideInput, base::Unretained(this))); | 67 channels, kScaleFactor, SincResampler::kDefaultBlockSize, base::Bind( |
| 68 &MultiChannelResamplerTest::ProvideInput, base::Unretained(this))); |
68 | 69 |
69 // First prime the resampler with some junk data, so we can verify Flush(). | 70 // First prime the resampler with some junk data, so we can verify Flush(). |
70 fill_junk_values_ = true; | 71 fill_junk_values_ = true; |
71 resampler.Resample(audio_bus_.get(), 1); | 72 resampler.Resample(audio_bus_.get(), 1); |
72 resampler.Flush(); | 73 resampler.Flush(); |
73 fill_junk_values_ = false; | 74 fill_junk_values_ = false; |
74 | 75 |
75 // The last frame delay should be strictly less than the total frame count. | 76 // The last frame delay should be strictly less than the total frame count. |
76 EXPECT_LT(last_frame_delay_, audio_bus_->frames()); | 77 EXPECT_LT(last_frame_delay_, audio_bus_->frames()); |
77 last_frame_delay_ = -1; | 78 last_frame_delay_ = -1; |
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129 TEST_P(MultiChannelResamplerTest, LowLatency) { | 130 TEST_P(MultiChannelResamplerTest, LowLatency) { |
130 LowLatencyTest(GetParam()); | 131 LowLatencyTest(GetParam()); |
131 } | 132 } |
132 | 133 |
133 // Test common channel layouts: mono, stereo, 5.1, 7.1. | 134 // Test common channel layouts: mono, stereo, 5.1, 7.1. |
134 INSTANTIATE_TEST_CASE_P( | 135 INSTANTIATE_TEST_CASE_P( |
135 MultiChannelResamplerTest, MultiChannelResamplerTest, | 136 MultiChannelResamplerTest, MultiChannelResamplerTest, |
136 testing::Values(1, 2, 6, 8)); | 137 testing::Values(1, 2, 6, 8)); |
137 | 138 |
138 } // namespace media | 139 } // namespace media |
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