mirror of
https://github.com/mollyim/webrtc.git
synced 2025-05-17 15:47:53 +01:00
f9807259a6
This CL passes the spectral power estimates for all channels into the AecState. Bug: webrtc:10913 Change-Id: Ie3b5c443be0c63f205e23ed2bfea06d9c447eb39 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/156165 Reviewed-by: Sam Zackrisson <saza@webrtc.org> Commit-Queue: Per Åhgren <peah@webrtc.org> Cr-Commit-Position: refs/heads/master@{#29417}
311 lines
12 KiB
C++
311 lines
12 KiB
C++
/*
|
|
* 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/subtractor.h"
|
|
|
|
#include <algorithm>
|
|
#include <memory>
|
|
#include <numeric>
|
|
#include <string>
|
|
|
|
#include "modules/audio_processing/aec3/aec_state.h"
|
|
#include "modules/audio_processing/aec3/render_delay_buffer.h"
|
|
#include "modules/audio_processing/test/echo_canceller_test_tools.h"
|
|
#include "modules/audio_processing/utility/cascaded_biquad_filter.h"
|
|
#include "rtc_base/random.h"
|
|
#include "rtc_base/strings/string_builder.h"
|
|
#include "test/gtest.h"
|
|
|
|
namespace webrtc {
|
|
namespace {
|
|
|
|
std::vector<float> RunSubtractorTest(
|
|
size_t num_render_channels,
|
|
size_t num_capture_channels,
|
|
int num_blocks_to_process,
|
|
int delay_samples,
|
|
int main_filter_length_blocks,
|
|
int shadow_filter_length_blocks,
|
|
bool uncorrelated_inputs,
|
|
const std::vector<int>& blocks_with_echo_path_changes) {
|
|
ApmDataDumper data_dumper(42);
|
|
constexpr int kSampleRateHz = 48000;
|
|
constexpr size_t kNumBands = NumBandsForRate(kSampleRateHz);
|
|
EchoCanceller3Config config;
|
|
config.filter.main.length_blocks = main_filter_length_blocks;
|
|
config.filter.shadow.length_blocks = shadow_filter_length_blocks;
|
|
|
|
Subtractor subtractor(config, num_render_channels, num_capture_channels,
|
|
&data_dumper, DetectOptimization());
|
|
absl::optional<DelayEstimate> delay_estimate;
|
|
std::vector<std::vector<std::vector<float>>> x(
|
|
kNumBands, std::vector<std::vector<float>>(
|
|
num_render_channels, std::vector<float>(kBlockSize, 0.f)));
|
|
std::vector<std::vector<float>> y(num_capture_channels,
|
|
std::vector<float>(kBlockSize, 0.f));
|
|
std::array<float, kBlockSize> x_old;
|
|
std::vector<SubtractorOutput> output(num_capture_channels);
|
|
config.delay.default_delay = 1;
|
|
std::unique_ptr<RenderDelayBuffer> render_delay_buffer(
|
|
RenderDelayBuffer::Create(config, kSampleRateHz, num_render_channels));
|
|
RenderSignalAnalyzer render_signal_analyzer(config);
|
|
Random random_generator(42U);
|
|
Aec3Fft fft;
|
|
std::vector<std::array<float, kFftLengthBy2Plus1>> Y2(num_capture_channels);
|
|
std::vector<std::array<float, kFftLengthBy2Plus1>> E2_main(
|
|
num_capture_channels);
|
|
std::array<float, kFftLengthBy2Plus1> E2_shadow;
|
|
AecState aec_state(config, num_capture_channels);
|
|
x_old.fill(0.f);
|
|
for (auto& Y2_ch : Y2) {
|
|
Y2_ch.fill(0.f);
|
|
}
|
|
for (auto& E2_main_ch : E2_main) {
|
|
E2_main_ch.fill(0.f);
|
|
}
|
|
E2_shadow.fill(0.f);
|
|
|
|
std::vector<std::vector<std::unique_ptr<DelayBuffer<float>>>> delay_buffer(
|
|
num_capture_channels);
|
|
for (size_t capture_ch = 0; capture_ch < num_capture_channels; ++capture_ch) {
|
|
delay_buffer[capture_ch].resize(num_render_channels);
|
|
for (size_t render_ch = 0; render_ch < num_render_channels; ++render_ch) {
|
|
delay_buffer[capture_ch][render_ch] =
|
|
std::make_unique<DelayBuffer<float>>(delay_samples);
|
|
}
|
|
}
|
|
|
|
// [B,A] = butter(2,100/8000,'high')
|
|
constexpr CascadedBiQuadFilter::BiQuadCoefficients
|
|
kHighPassFilterCoefficients = {{0.97261f, -1.94523f, 0.97261f},
|
|
{-1.94448f, 0.94598f}};
|
|
std::vector<std::unique_ptr<CascadedBiQuadFilter>> x_hp_filter(
|
|
num_render_channels);
|
|
for (size_t ch = 0; ch < num_render_channels; ++ch) {
|
|
x_hp_filter[ch] =
|
|
std::make_unique<CascadedBiQuadFilter>(kHighPassFilterCoefficients, 1);
|
|
}
|
|
std::vector<std::unique_ptr<CascadedBiQuadFilter>> y_hp_filter(
|
|
num_capture_channels);
|
|
for (size_t ch = 0; ch < num_capture_channels; ++ch) {
|
|
y_hp_filter[ch] =
|
|
std::make_unique<CascadedBiQuadFilter>(kHighPassFilterCoefficients, 1);
|
|
}
|
|
|
|
for (int k = 0; k < num_blocks_to_process; ++k) {
|
|
for (size_t render_ch = 0; render_ch < num_render_channels; ++render_ch) {
|
|
RandomizeSampleVector(&random_generator, x[0][render_ch]);
|
|
}
|
|
if (uncorrelated_inputs) {
|
|
for (size_t capture_ch = 0; capture_ch < num_capture_channels;
|
|
++capture_ch) {
|
|
RandomizeSampleVector(&random_generator, y[capture_ch]);
|
|
}
|
|
} else {
|
|
for (size_t capture_ch = 0; capture_ch < num_capture_channels;
|
|
++capture_ch) {
|
|
for (size_t render_ch = 0; render_ch < num_render_channels;
|
|
++render_ch) {
|
|
std::array<float, kBlockSize> y_channel;
|
|
delay_buffer[capture_ch][render_ch]->Delay(x[0][render_ch],
|
|
y_channel);
|
|
for (size_t k = 0; k < y.size(); ++k) {
|
|
y[capture_ch][k] += y_channel[k] / num_render_channels;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
for (size_t ch = 0; ch < num_render_channels; ++ch) {
|
|
x_hp_filter[ch]->Process(x[0][ch]);
|
|
}
|
|
for (size_t ch = 0; ch < num_capture_channels; ++ch) {
|
|
y_hp_filter[ch]->Process(y[ch]);
|
|
}
|
|
|
|
render_delay_buffer->Insert(x);
|
|
if (k == 0) {
|
|
render_delay_buffer->Reset();
|
|
}
|
|
render_delay_buffer->PrepareCaptureProcessing();
|
|
render_signal_analyzer.Update(*render_delay_buffer->GetRenderBuffer(),
|
|
aec_state.FilterDelayBlocks());
|
|
|
|
// Handle echo path changes.
|
|
if (std::find(blocks_with_echo_path_changes.begin(),
|
|
blocks_with_echo_path_changes.end(),
|
|
k) != blocks_with_echo_path_changes.end()) {
|
|
subtractor.HandleEchoPathChange(EchoPathVariability(
|
|
true, EchoPathVariability::DelayAdjustment::kNewDetectedDelay,
|
|
false));
|
|
}
|
|
subtractor.Process(*render_delay_buffer->GetRenderBuffer(), y,
|
|
render_signal_analyzer, aec_state, output);
|
|
|
|
aec_state.HandleEchoPathChange(EchoPathVariability(
|
|
false, EchoPathVariability::DelayAdjustment::kNone, false));
|
|
aec_state.Update(delay_estimate, subtractor.FilterFrequencyResponse(),
|
|
subtractor.FilterImpulseResponse(),
|
|
*render_delay_buffer->GetRenderBuffer(), E2_main, Y2,
|
|
output);
|
|
}
|
|
|
|
std::vector<float> results(num_capture_channels);
|
|
for (size_t ch = 0; ch < num_capture_channels; ++ch) {
|
|
const float output_power =
|
|
std::inner_product(output[ch].e_main.begin(), output[ch].e_main.end(),
|
|
output[ch].e_main.begin(), 0.f);
|
|
const float y_power =
|
|
std::inner_product(y[ch].begin(), y[ch].end(), y[ch].begin(), 0.f);
|
|
if (y_power == 0.f) {
|
|
ADD_FAILURE();
|
|
results[ch] = -1.f;
|
|
}
|
|
results[ch] = output_power / y_power;
|
|
}
|
|
return results;
|
|
}
|
|
|
|
std::string ProduceDebugText(size_t num_render_channels,
|
|
size_t num_capture_channels,
|
|
size_t delay,
|
|
int filter_length_blocks) {
|
|
rtc::StringBuilder ss;
|
|
ss << "delay: " << delay << ", ";
|
|
ss << "filter_length_blocks:" << filter_length_blocks << ", ";
|
|
ss << "num_render_channels:" << num_render_channels << ", ";
|
|
ss << "num_capture_channels:" << num_capture_channels;
|
|
return ss.Release();
|
|
}
|
|
|
|
} // namespace
|
|
|
|
#if RTC_DCHECK_IS_ON && GTEST_HAS_DEATH_TEST && !defined(WEBRTC_ANDROID)
|
|
|
|
// Verifies that the check for non data dumper works.
|
|
TEST(Subtractor, NullDataDumper) {
|
|
EXPECT_DEATH(
|
|
Subtractor(EchoCanceller3Config(), 1, 1, nullptr, DetectOptimization()),
|
|
"");
|
|
}
|
|
|
|
// Verifies the check for the capture signal size.
|
|
TEST(Subtractor, WrongCaptureSize) {
|
|
ApmDataDumper data_dumper(42);
|
|
EchoCanceller3Config config;
|
|
Subtractor subtractor(config, 1, 1, &data_dumper, DetectOptimization());
|
|
std::unique_ptr<RenderDelayBuffer> render_delay_buffer(
|
|
RenderDelayBuffer::Create(config, 48000, 1));
|
|
RenderSignalAnalyzer render_signal_analyzer(config);
|
|
std::vector<std::vector<float>> y(1, std::vector<float>(kBlockSize - 1, 0.f));
|
|
std::array<SubtractorOutput, 1> output;
|
|
|
|
EXPECT_DEATH(
|
|
subtractor.Process(*render_delay_buffer->GetRenderBuffer(), y,
|
|
render_signal_analyzer, AecState(config, 1), output),
|
|
"");
|
|
}
|
|
|
|
#endif
|
|
|
|
// Verifies that the subtractor is able to converge on correlated data.
|
|
TEST(Subtractor, Convergence) {
|
|
std::vector<int> blocks_with_echo_path_changes;
|
|
for (size_t filter_length_blocks : {12, 20, 30}) {
|
|
for (size_t delay_samples : {0, 64, 150, 200, 301}) {
|
|
SCOPED_TRACE(ProduceDebugText(1, 1, delay_samples, filter_length_blocks));
|
|
std::vector<float> echo_to_nearend_powers = RunSubtractorTest(
|
|
1, 1, 2500, delay_samples, filter_length_blocks, filter_length_blocks,
|
|
false, blocks_with_echo_path_changes);
|
|
|
|
for (float echo_to_nearend_power : echo_to_nearend_powers) {
|
|
EXPECT_GT(0.1f, echo_to_nearend_power);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// Verifies that the subtractor is able to converge on correlated data.
|
|
TEST(Subtractor, ConvergenceMultiChannel) {
|
|
std::vector<int> blocks_with_echo_path_changes;
|
|
for (size_t num_render_channels : {1, 2, 4, 8}) {
|
|
for (size_t num_capture_channels : {1, 2, 4}) {
|
|
SCOPED_TRACE(
|
|
ProduceDebugText(num_render_channels, num_render_channels, 64, 20));
|
|
size_t num_blocks_to_process = 2500 * num_render_channels;
|
|
std::vector<float> echo_to_nearend_powers = RunSubtractorTest(
|
|
num_render_channels, num_capture_channels, num_blocks_to_process, 64,
|
|
20, 20, false, blocks_with_echo_path_changes);
|
|
|
|
for (float echo_to_nearend_power : echo_to_nearend_powers) {
|
|
EXPECT_GT(0.1f, echo_to_nearend_power);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// Verifies that the subtractor is able to handle the case when the main filter
|
|
// is longer than the shadow filter.
|
|
TEST(Subtractor, MainFilterLongerThanShadowFilter) {
|
|
std::vector<int> blocks_with_echo_path_changes;
|
|
std::vector<float> echo_to_nearend_powers = RunSubtractorTest(
|
|
1, 1, 400, 64, 20, 15, false, blocks_with_echo_path_changes);
|
|
for (float echo_to_nearend_power : echo_to_nearend_powers) {
|
|
EXPECT_GT(0.5f, echo_to_nearend_power);
|
|
}
|
|
}
|
|
|
|
// Verifies that the subtractor is able to handle the case when the shadow
|
|
// filter is longer than the main filter.
|
|
TEST(Subtractor, ShadowFilterLongerThanMainFilter) {
|
|
std::vector<int> blocks_with_echo_path_changes;
|
|
std::vector<float> echo_to_nearend_powers = RunSubtractorTest(
|
|
1, 1, 400, 64, 15, 20, false, blocks_with_echo_path_changes);
|
|
for (float echo_to_nearend_power : echo_to_nearend_powers) {
|
|
EXPECT_GT(0.5f, echo_to_nearend_power);
|
|
}
|
|
}
|
|
|
|
// Verifies that the subtractor does not converge on uncorrelated signals.
|
|
TEST(Subtractor, NonConvergenceOnUncorrelatedSignals) {
|
|
std::vector<int> blocks_with_echo_path_changes;
|
|
for (size_t filter_length_blocks : {12, 20, 30}) {
|
|
for (size_t delay_samples : {0, 64, 150, 200, 301}) {
|
|
SCOPED_TRACE(ProduceDebugText(1, 1, delay_samples, filter_length_blocks));
|
|
|
|
std::vector<float> echo_to_nearend_powers = RunSubtractorTest(
|
|
1, 1, 3000, delay_samples, filter_length_blocks, filter_length_blocks,
|
|
true, blocks_with_echo_path_changes);
|
|
for (float echo_to_nearend_power : echo_to_nearend_powers) {
|
|
EXPECT_NEAR(1.f, echo_to_nearend_power, 0.1);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// Verifies that the subtractor does not converge on uncorrelated signals.
|
|
TEST(Subtractor, NonConvergenceOnUncorrelatedSignalsMultiChannel) {
|
|
std::vector<int> blocks_with_echo_path_changes;
|
|
for (size_t num_render_channels : {1, 2, 4}) {
|
|
for (size_t num_capture_channels : {1, 2, 4}) {
|
|
SCOPED_TRACE(
|
|
ProduceDebugText(num_render_channels, num_render_channels, 64, 20));
|
|
size_t num_blocks_to_process = 5000 * num_render_channels;
|
|
std::vector<float> echo_to_nearend_powers = RunSubtractorTest(
|
|
num_render_channels, num_capture_channels, num_blocks_to_process, 64,
|
|
20, 20, true, blocks_with_echo_path_changes);
|
|
for (float echo_to_nearend_power : echo_to_nearend_powers) {
|
|
EXPECT_LT(.8f, echo_to_nearend_power);
|
|
EXPECT_NEAR(1.f, echo_to_nearend_power, 0.25f);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
} // namespace webrtc
|