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/*
* Copyright (c) 2018 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/lp_residual.h"
#include <algorithm>
#include <array>
#include <vector>
#include "modules/audio_processing/agc2/rnn_vad/common.h"
#include "modules/audio_processing/agc2/rnn_vad/test_utils.h"
// TODO(bugs.webrtc.org/8948): Add when the issue is fixed.
// #include "test/fpe_observer.h"
#include "test/gtest.h"
namespace webrtc {
namespace rnn_vad {
namespace {
// Checks that the LP residual can be computed on an empty frame.
TEST(RnnVadTest, LpResidualOfEmptyFrame) {
// TODO(bugs.webrtc.org/8948): Add when the issue is fixed.
// FloatingPointExceptionObserver fpe_observer;
// Input frame (empty, i.e., all samples set to 0).
std::array<float, kFrameSize10ms24kHz> empty_frame;
empty_frame.fill(0.f);
// Compute inverse filter coefficients.
std::array<float, kNumLpcCoefficients> lpc;
ComputeAndPostProcessLpcCoefficients(empty_frame, lpc);
// Compute LP residual.
std::array<float, kFrameSize10ms24kHz> lp_residual;
ComputeLpResidual(lpc, empty_frame, lp_residual);
}
// Checks that the computed LP residual is bit-exact given test input data.
TEST(RnnVadTest, LpResidualPipelineBitExactness) {
// Input and expected output readers.
ChunksFileReader pitch_buffer_reader = CreatePitchBuffer24kHzReader();
ChunksFileReader lp_pitch_reader = CreateLpResidualAndPitchInfoReader();
// Buffers.
std::vector<float> pitch_buffer_24kHz(kBufSize24kHz);
std::array<float, kNumLpcCoefficients> lpc;
std::vector<float> computed_lp_residual(kBufSize24kHz);
std::vector<float> expected_lp_residual(kBufSize24kHz);
// Test length.
const int num_frames =
std::min(pitch_buffer_reader.num_chunks, 300); // Max 3 s.
ASSERT_GE(lp_pitch_reader.num_chunks, num_frames);
// TODO(bugs.webrtc.org/8948): Add when the issue is fixed.
// FloatingPointExceptionObserver fpe_observer;
for (int i = 0; i < num_frames; ++i) {
SCOPED_TRACE(i);
// Read input.
ASSERT_TRUE(pitch_buffer_reader.reader->ReadChunk(pitch_buffer_24kHz));
// Read expected output (ignore pitch gain and period).
ASSERT_TRUE(lp_pitch_reader.reader->ReadChunk(expected_lp_residual));
lp_pitch_reader.reader->SeekForward(2); // Pitch period and strength.
// Check every 200 ms.
if (i % 20 == 0) {
ComputeAndPostProcessLpcCoefficients(pitch_buffer_24kHz, lpc);
ComputeLpResidual(lpc, pitch_buffer_24kHz, computed_lp_residual);
ExpectNearAbsolute(expected_lp_residual, computed_lp_residual, kFloatMin);
}
}
}
} // namespace
} // namespace rnn_vad
} // namespace webrtc
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