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/*
* Copyright (c) 2019 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/agc2/rnn_vad/auto_correlation.h"
#include "modules/audio_processing/agc2/rnn_vad/common.h"
#include "modules/audio_processing/agc2/rnn_vad/pitch_search_internal.h"
#include "modules/audio_processing/agc2/rnn_vad/test_utils.h"
#include "test/gtest.h"
namespace webrtc {
namespace rnn_vad {
namespace {
// Checks that the auto correlation function produces output within tolerance
// given test input data.
TEST(RnnVadTest, PitchBufferAutoCorrelationWithinTolerance) {
PitchTestData test_data;
std::array<float, kBufSize12kHz> pitch_buf_decimated;
Decimate2x(test_data.PitchBuffer24kHzView(), pitch_buf_decimated);
std::array<float, kNumLags12kHz> computed_output;
{
// TODO(bugs.webrtc.org/8948): Add when the issue is fixed.
// FloatingPointExceptionObserver fpe_observer;
AutoCorrelationCalculator auto_corr_calculator;
auto_corr_calculator.ComputeOnPitchBuffer(pitch_buf_decimated,
computed_output);
}
auto auto_corr_view = test_data.AutoCorrelation12kHzView();
ExpectNearAbsolute({auto_corr_view.data(), auto_corr_view.size()},
computed_output, 3e-3f);
}
// Checks that the auto correlation function computes the right thing for a
// simple use case.
TEST(RnnVadTest, CheckAutoCorrelationOnConstantPitchBuffer) {
// Create constant signal with no pitch.
std::array<float, kBufSize12kHz> pitch_buf_decimated;
std::fill(pitch_buf_decimated.begin(), pitch_buf_decimated.end(), 1.f);
std::array<float, kNumLags12kHz> computed_output;
{
// TODO(bugs.webrtc.org/8948): Add when the issue is fixed.
// FloatingPointExceptionObserver fpe_observer;
AutoCorrelationCalculator auto_corr_calculator;
auto_corr_calculator.ComputeOnPitchBuffer(pitch_buf_decimated,
computed_output);
}
// The expected output is a vector filled with the same expected
// auto-correlation value. The latter equals the length of a 20 ms frame.
constexpr int kFrameSize20ms12kHz = kFrameSize20ms24kHz / 2;
std::array<float, kNumLags12kHz> expected_output;
std::fill(expected_output.begin(), expected_output.end(),
static_cast<float>(kFrameSize20ms12kHz));
ExpectNearAbsolute(expected_output, computed_output, 4e-5f);
}
} // namespace
} // namespace rnn_vad
} // namespace webrtc
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