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/*
* Copyright (c) 2017 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "modules/audio_processing/aec3/echo_remover.h"
#include <algorithm>
#include <memory>
#include <numeric>
#include <string>
#include "modules/audio_processing/aec3/aec3_common.h"
#include "modules/audio_processing/aec3/render_buffer.h"
#include "modules/audio_processing/aec3/render_delay_buffer.h"
#include "modules/audio_processing/logging/apm_data_dumper.h"
#include "modules/audio_processing/test/echo_canceller_test_tools.h"
#include "rtc_base/random.h"
#include "rtc_base/strings/string_builder.h"
#include "test/gtest.h"
namespace webrtc {
namespace {
std::string ProduceDebugText(int sample_rate_hz) {
rtc::StringBuilder ss;
ss << "Sample rate: " << sample_rate_hz;
return ss.Release();
}
std::string ProduceDebugText(int sample_rate_hz, int delay) {
rtc::StringBuilder ss(ProduceDebugText(sample_rate_hz));
ss << ", Delay: " << delay;
return ss.Release();
}
} // namespace
// Verifies the basic API call sequence
TEST(EchoRemover, BasicApiCalls) {
absl::optional<DelayEstimate> delay_estimate;
for (auto rate : {8000, 16000, 32000, 48000}) {
SCOPED_TRACE(ProduceDebugText(rate));
std::unique_ptr<EchoRemover> remover(
EchoRemover::Create(EchoCanceller3Config(), rate));
std::unique_ptr<RenderDelayBuffer> render_buffer(RenderDelayBuffer::Create(
EchoCanceller3Config(), NumBandsForRate(rate)));
std::vector<std::vector<float>> render(NumBandsForRate(rate),
std::vector<float>(kBlockSize, 0.f));
std::vector<std::vector<float>> capture(
NumBandsForRate(rate), std::vector<float>(kBlockSize, 0.f));
for (size_t k = 0; k < 100; ++k) {
EchoPathVariability echo_path_variability(
k % 3 == 0 ? true : false,
k % 5 == 0 ? EchoPathVariability::DelayAdjustment::kNewDetectedDelay
: EchoPathVariability::DelayAdjustment::kNone,
false);
render_buffer->Insert(render);
render_buffer->PrepareCaptureProcessing();
remover->ProcessCapture(echo_path_variability, k % 2 == 0 ? true : false,
delay_estimate, render_buffer->GetRenderBuffer(),
&capture);
}
}
}
#if RTC_DCHECK_IS_ON && GTEST_HAS_DEATH_TEST && !defined(WEBRTC_ANDROID)
// Verifies the check for the samplerate.
// TODO(peah): Re-enable the test once the issue with memory leaks during DEATH
// tests on test bots has been fixed.
TEST(EchoRemover, DISABLED_WrongSampleRate) {
EXPECT_DEATH(std::unique_ptr<EchoRemover>(
EchoRemover::Create(EchoCanceller3Config(), 8001)),
"");
}
// Verifies the check for the capture block size.
TEST(EchoRemover, WrongCaptureBlockSize) {
absl::optional<DelayEstimate> delay_estimate;
for (auto rate : {8000, 16000, 32000, 48000}) {
SCOPED_TRACE(ProduceDebugText(rate));
std::unique_ptr<EchoRemover> remover(
EchoRemover::Create(EchoCanceller3Config(), rate));
std::unique_ptr<RenderDelayBuffer> render_buffer(RenderDelayBuffer::Create(
EchoCanceller3Config(), NumBandsForRate(rate)));
std::vector<std::vector<float>> capture(
NumBandsForRate(rate), std::vector<float>(kBlockSize - 1, 0.f));
EchoPathVariability echo_path_variability(
false, EchoPathVariability::DelayAdjustment::kNone, false);
EXPECT_DEATH(
remover->ProcessCapture(echo_path_variability, false, delay_estimate,
render_buffer->GetRenderBuffer(), &capture),
"");
}
}
// Verifies the check for the number of capture bands.
// TODO(peah): Re-enable the test once the issue with memory leaks during DEATH
// tests on test bots has been fixed.c
TEST(EchoRemover, DISABLED_WrongCaptureNumBands) {
absl::optional<DelayEstimate> delay_estimate;
for (auto rate : {16000, 32000, 48000}) {
SCOPED_TRACE(ProduceDebugText(rate));
std::unique_ptr<EchoRemover> remover(
EchoRemover::Create(EchoCanceller3Config(), rate));
std::unique_ptr<RenderDelayBuffer> render_buffer(RenderDelayBuffer::Create(
EchoCanceller3Config(), NumBandsForRate(rate)));
std::vector<std::vector<float>> capture(
NumBandsForRate(rate == 48000 ? 16000 : rate + 16000),
std::vector<float>(kBlockSize, 0.f));
EchoPathVariability echo_path_variability(
false, EchoPathVariability::DelayAdjustment::kNone, false);
EXPECT_DEATH(
remover->ProcessCapture(echo_path_variability, false, delay_estimate,
render_buffer->GetRenderBuffer(), &capture),
"");
}
}
// Verifies the check for non-null capture block.
TEST(EchoRemover, NullCapture) {
absl::optional<DelayEstimate> delay_estimate;
std::unique_ptr<EchoRemover> remover(
EchoRemover::Create(EchoCanceller3Config(), 8000));
std::unique_ptr<RenderDelayBuffer> render_buffer(
RenderDelayBuffer::Create(EchoCanceller3Config(), 3));
EchoPathVariability echo_path_variability(
false, EchoPathVariability::DelayAdjustment::kNone, false);
EXPECT_DEATH(
remover->ProcessCapture(echo_path_variability, false, delay_estimate,
render_buffer->GetRenderBuffer(), nullptr),
"");
}
#endif
// Performs a sanity check that the echo_remover is able to properly
// remove echoes.
TEST(EchoRemover, BasicEchoRemoval) {
constexpr int kNumBlocksToProcess = 500;
Random random_generator(42U);
absl::optional<DelayEstimate> delay_estimate;
for (auto rate : {8000, 16000, 32000, 48000}) {
std::vector<std::vector<float>> x(NumBandsForRate(rate),
std::vector<float>(kBlockSize, 0.f));
std::vector<std::vector<float>> y(NumBandsForRate(rate),
std::vector<float>(kBlockSize, 0.f));
EchoPathVariability echo_path_variability(
false, EchoPathVariability::DelayAdjustment::kNone, false);
for (size_t delay_samples : {0, 64, 150, 200, 301}) {
SCOPED_TRACE(ProduceDebugText(rate, delay_samples));
EchoCanceller3Config config;
std::unique_ptr<EchoRemover> remover(EchoRemover::Create(config, rate));
std::unique_ptr<RenderDelayBuffer> render_buffer(
RenderDelayBuffer::Create(config, NumBandsForRate(rate)));
render_buffer->AlignFromDelay(delay_samples / kBlockSize);
std::vector<std::unique_ptr<DelayBuffer<float>>> delay_buffers(x.size());
for (size_t j = 0; j < x.size(); ++j) {
delay_buffers[j].reset(new DelayBuffer<float>(delay_samples));
}
float input_energy = 0.f;
float output_energy = 0.f;
for (int k = 0; k < kNumBlocksToProcess; ++k) {
const bool silence = k < 100 || (k % 100 >= 10);
for (size_t j = 0; j < x.size(); ++j) {
if (silence) {
std::fill(x[j].begin(), x[j].end(), 0.f);
} else {
RandomizeSampleVector(&random_generator, x[j]);
}
delay_buffers[j]->Delay(x[j], y[j]);
}
if (k > kNumBlocksToProcess / 2) {
for (size_t j = 0; j < x.size(); ++j) {
input_energy = std::inner_product(y[j].begin(), y[j].end(),
y[j].begin(), input_energy);
}
}
render_buffer->Insert(x);
render_buffer->PrepareCaptureProcessing();
remover->ProcessCapture(echo_path_variability, false, delay_estimate,
render_buffer->GetRenderBuffer(), &y);
if (k > kNumBlocksToProcess / 2) {
for (size_t j = 0; j < x.size(); ++j) {
output_energy = std::inner_product(y[j].begin(), y[j].end(),
y[j].begin(), output_energy);
}
}
}
EXPECT_GT(input_energy, 10.f * output_energy);
}
}
}
} // namespace webrtc