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92ea95e34a
In https://webrtc-review.googlesource.com/c/src/+/1560 we moved WebRTC from src/webrtc to src/ (in order to preserve an healthy git history). This CL takes care of fixing header guards, #include paths, etc... NOPRESUBMIT=true NOTREECHECKS=true NOTRY=true TBR=tommi@webrtc.org Bug: chromium:611808 Change-Id: Iea91618212bee0af16aa3f05071eab8f93706578 Reviewed-on: https://webrtc-review.googlesource.com/1561 Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org> Reviewed-by: Henrik Kjellander <kjellander@webrtc.org> Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org> Cr-Commit-Position: refs/heads/master@{#19846}
127 lines
4 KiB
C++
127 lines
4 KiB
C++
/*
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* Copyright (c) 2017 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include "modules/audio_processing/aec3/decimator_by_4.h"
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#include <math.h>
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#include <algorithm>
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#include <array>
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#include <numeric>
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#include <sstream>
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#include <string>
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#include <vector>
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#include "modules/audio_processing/aec3/aec3_common.h"
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#include "test/gtest.h"
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namespace webrtc {
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namespace {
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std::string ProduceDebugText(int sample_rate_hz) {
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std::ostringstream ss;
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ss << "Sample rate: " << sample_rate_hz;
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return ss.str();
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}
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constexpr float kPi = 3.141592f;
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constexpr size_t kNumStartupBlocks = 50;
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constexpr size_t kNumBlocks = 1000;
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void ProduceDecimatedSinusoidalOutputPower(int sample_rate_hz,
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float sinusoidal_frequency_hz,
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float* input_power,
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float* output_power) {
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float input[kBlockSize * kNumBlocks];
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// Produce a sinusoid of the specified frequency.
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for (size_t k = 0; k < kBlockSize * kNumBlocks; ++k) {
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input[k] =
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32767.f * sin(2.f * kPi * sinusoidal_frequency_hz * k / sample_rate_hz);
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}
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DecimatorBy4 decimator;
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std::array<float, kSubBlockSize * kNumBlocks> output;
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for (size_t k = 0; k < kNumBlocks; ++k) {
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std::array<float, kSubBlockSize> sub_block;
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decimator.Decimate(
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rtc::ArrayView<const float>(&input[k * kBlockSize], kBlockSize),
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sub_block);
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std::copy(sub_block.begin(), sub_block.end(),
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output.begin() + k * kSubBlockSize);
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}
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ASSERT_GT(kNumBlocks, kNumStartupBlocks);
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rtc::ArrayView<const float> input_to_evaluate(
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&input[kNumStartupBlocks * kBlockSize],
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(kNumBlocks - kNumStartupBlocks) * kBlockSize);
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rtc::ArrayView<const float> output_to_evaluate(
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&output[kNumStartupBlocks * kSubBlockSize],
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(kNumBlocks - kNumStartupBlocks) * kSubBlockSize);
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*input_power =
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std::inner_product(input_to_evaluate.begin(), input_to_evaluate.end(),
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input_to_evaluate.begin(), 0.f) /
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input_to_evaluate.size();
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*output_power =
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std::inner_product(output_to_evaluate.begin(), output_to_evaluate.end(),
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output_to_evaluate.begin(), 0.f) /
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output_to_evaluate.size();
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}
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} // namespace
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// Verifies that there is little aliasing from upper frequencies in the
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// downsampling.
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TEST(DecimatorBy4, NoLeakageFromUpperFrequencies) {
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float input_power;
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float output_power;
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for (auto rate : {8000, 16000, 32000, 48000}) {
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ProduceDebugText(rate);
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ProduceDecimatedSinusoidalOutputPower(rate, 3.f / 8.f * rate, &input_power,
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&output_power);
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EXPECT_GT(0.0001f * input_power, output_power);
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}
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}
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// Verifies that the impact of low-frequency content is small during the
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// downsampling.
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TEST(DecimatorBy4, NoImpactOnLowerFrequencies) {
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float input_power;
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float output_power;
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for (auto rate : {8000, 16000, 32000, 48000}) {
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ProduceDebugText(rate);
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ProduceDecimatedSinusoidalOutputPower(rate, 200.f, &input_power,
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&output_power);
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EXPECT_LT(0.7f * input_power, output_power);
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}
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}
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#if RTC_DCHECK_IS_ON && GTEST_HAS_DEATH_TEST && !defined(WEBRTC_ANDROID)
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// Verifies the check for the input size.
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TEST(DecimatorBy4, WrongInputSize) {
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DecimatorBy4 decimator;
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std::vector<float> x(std::vector<float>(kBlockSize - 1, 0.f));
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std::array<float, kSubBlockSize> x_downsampled;
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EXPECT_DEATH(decimator.Decimate(x, x_downsampled), "");
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}
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// Verifies the check for non-null output parameter.
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TEST(DecimatorBy4, NullOutput) {
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DecimatorBy4 decimator;
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std::vector<float> x(std::vector<float>(kBlockSize, 0.f));
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EXPECT_DEATH(decimator.Decimate(x, nullptr), "");
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}
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#endif
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} // namespace webrtc
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