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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 "api/environment/environment.h"
#include "api/environment/environment_factory.h"
#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) {
StringBuilder ss;
ss << "Sample rate: " << sample_rate_hz;
return ss.Release();
}
std::string ProduceDebugText(int sample_rate_hz, int delay) {
StringBuilder ss(ProduceDebugText(sample_rate_hz));
ss << ", Delay: " << delay;
return ss.Release();
}
} // namespace
class EchoRemoverMultiChannel
: public ::testing::Test,
public ::testing::WithParamInterface<std::tuple<size_t, size_t>> {};
INSTANTIATE_TEST_SUITE_P(MultiChannel,
EchoRemoverMultiChannel,
::testing::Combine(::testing::Values(1, 2, 8),
::testing::Values(1, 2, 8)));
// Verifies the basic API call sequence
TEST_P(EchoRemoverMultiChannel, BasicApiCalls) {
const size_t num_render_channels = std::get<0>(GetParam());
const size_t num_capture_channels = std::get<1>(GetParam());
const Environment env = CreateEnvironment();
std::optional<DelayEstimate> delay_estimate;
for (auto rate : {16000, 32000, 48000}) {
SCOPED_TRACE(ProduceDebugText(rate));
std::unique_ptr<EchoRemover> remover =
EchoRemover::Create(env, EchoCanceller3Config(), rate,
num_render_channels, num_capture_channels);
std::unique_ptr<RenderDelayBuffer> render_buffer(RenderDelayBuffer::Create(
EchoCanceller3Config(), rate, num_render_channels));
Block render(NumBandsForRate(rate), num_render_channels);
Block capture(NumBandsForRate(rate), num_capture_channels);
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(),
nullptr, &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(EchoRemoverDeathTest, DISABLED_WrongSampleRate) {
EXPECT_DEATH(EchoRemover::Create(CreateEnvironment(), EchoCanceller3Config(),
8001, 1, 1),
"");
}
// 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(EchoRemoverDeathTest, DISABLED_WrongCaptureNumBands) {
const Environment env = CreateEnvironment();
std::optional<DelayEstimate> delay_estimate;
for (auto rate : {16000, 32000, 48000}) {
SCOPED_TRACE(ProduceDebugText(rate));
std::unique_ptr<EchoRemover> remover =
EchoRemover::Create(env, EchoCanceller3Config(), rate, 1, 1);
std::unique_ptr<RenderDelayBuffer> render_buffer(
RenderDelayBuffer::Create(EchoCanceller3Config(), rate, 1));
Block capture(NumBandsForRate(rate == 48000 ? 16000 : rate + 16000), 1);
EchoPathVariability echo_path_variability(
false, EchoPathVariability::DelayAdjustment::kNone, false);
EXPECT_DEATH(remover->ProcessCapture(
echo_path_variability, false, delay_estimate,
render_buffer->GetRenderBuffer(), nullptr, &capture),
"");
}
}
// Verifies the check for non-null capture block.
TEST(EchoRemoverDeathTest, NullCapture) {
std::optional<DelayEstimate> delay_estimate;
std::unique_ptr<EchoRemover> remover = EchoRemover::Create(
CreateEnvironment(), EchoCanceller3Config(), 16000, 1, 1);
std::unique_ptr<RenderDelayBuffer> render_buffer(
RenderDelayBuffer::Create(EchoCanceller3Config(), 16000, 1));
EchoPathVariability echo_path_variability(
false, EchoPathVariability::DelayAdjustment::kNone, false);
EXPECT_DEATH(remover->ProcessCapture(
echo_path_variability, false, delay_estimate,
render_buffer->GetRenderBuffer(), nullptr, nullptr),
"");
}
#endif
// Performs a sanity check that the echo_remover is able to properly
// remove echoes.
TEST(EchoRemover, BasicEchoRemoval) {
constexpr int kNumBlocksToProcess = 500;
const Environment env = CreateEnvironment();
Random random_generator(42U);
std::optional<DelayEstimate> delay_estimate;
for (size_t num_channels : {1, 2, 4}) {
for (auto rate : {16000, 32000, 48000}) {
Block x(NumBandsForRate(rate), num_channels);
Block y(NumBandsForRate(rate), num_channels);
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(env, config, rate, num_channels, num_channels);
std::unique_ptr<RenderDelayBuffer> render_buffer(
RenderDelayBuffer::Create(config, rate, num_channels));
render_buffer->AlignFromDelay(delay_samples / kBlockSize);
std::vector<std::vector<std::unique_ptr<DelayBuffer<float>>>>
delay_buffers(x.NumBands());
for (size_t band = 0; band < delay_buffers.size(); ++band) {
delay_buffers[band].resize(x.NumChannels());
}
for (int band = 0; band < x.NumBands(); ++band) {
for (int channel = 0; channel < x.NumChannels(); ++channel) {
delay_buffers[band][channel].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 (int band = 0; band < x.NumBands(); ++band) {
for (int channel = 0; channel < x.NumChannels(); ++channel) {
if (silence) {
std::fill(x.begin(band, channel), x.end(band, channel), 0.f);
} else {
RandomizeSampleVector(&random_generator, x.View(band, channel));
}
delay_buffers[band][channel]->Delay(x.View(band, channel),
y.View(band, channel));
}
}
if (k > kNumBlocksToProcess / 2) {
input_energy = std::inner_product(
y.begin(/*band=*/0, /*channel=*/0),
y.end(/*band=*/0, /*channel=*/0),
y.begin(/*band=*/0, /*channel=*/0), input_energy);
}
render_buffer->Insert(x);
render_buffer->PrepareCaptureProcessing();
remover->ProcessCapture(echo_path_variability, false, delay_estimate,
render_buffer->GetRenderBuffer(), nullptr,
&y);
if (k > kNumBlocksToProcess / 2) {
output_energy = std::inner_product(
y.begin(/*band=*/0, /*channel=*/0),
y.end(/*band=*/0, /*channel=*/0),
y.begin(/*band=*/0, /*channel=*/0), output_energy);
}
}
EXPECT_GT(input_energy, 10.f * output_energy);
}
}
}
}
} // namespace webrtc
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