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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.
*/
#ifndef MODULES_AUDIO_PROCESSING_AGC2_RNN_VAD_TEST_UTILS_H_
#define MODULES_AUDIO_PROCESSING_AGC2_RNN_VAD_TEST_UTILS_H_
#include <array>
#include <fstream>
#include <memory>
#include <string>
#include "absl/strings/string_view.h"
#include "api/array_view.h"
#include "modules/audio_processing/agc2/rnn_vad/common.h"
#include "rtc_base/checks.h"
#include "rtc_base/numerics/safe_compare.h"
namespace webrtc {
namespace rnn_vad {
constexpr float kFloatMin = std::numeric_limits<float>::min();
// Fails for every pair from two equally sized webrtc::ArrayView<float> views
// such that the values in the pair do not match.
void ExpectEqualFloatArray(ArrayView<const float> expected,
ArrayView<const float> computed);
// Fails for every pair from two equally sized webrtc::ArrayView<float> views
// such that their absolute error is above a given threshold.
void ExpectNearAbsolute(ArrayView<const float> expected,
ArrayView<const float> computed,
float tolerance);
// File reader interface.
class FileReader {
public:
virtual ~FileReader() = default;
// Number of values in the file.
virtual int size() const = 0;
// Reads `dst.size()` float values into `dst`, advances the internal file
// position according to the number of read bytes and returns true if the
// values are correctly read. If the number of remaining bytes in the file is
// not sufficient to read `dst.size()` float values, `dst` is partially
// modified and false is returned.
virtual bool ReadChunk(ArrayView<float> dst) = 0;
// Reads a single float value, advances the internal file position according
// to the number of read bytes and returns true if the value is correctly
// read. If the number of remaining bytes in the file is not sufficient to
// read one float, `dst` is not modified and false is returned.
virtual bool ReadValue(float& dst) = 0;
// Advances the internal file position by `hop` float values.
virtual void SeekForward(int hop) = 0;
// Resets the internal file position to BOF.
virtual void SeekBeginning() = 0;
};
// File reader for files that contain `num_chunks` chunks with size equal to
// `chunk_size`.
struct ChunksFileReader {
const int chunk_size;
const int num_chunks;
std::unique_ptr<FileReader> reader;
};
// Creates a reader for the PCM S16 samples file.
std::unique_ptr<FileReader> CreatePcmSamplesReader();
// Creates a reader for the 24 kHz pitch buffer test data.
ChunksFileReader CreatePitchBuffer24kHzReader();
// Creates a reader for the LP residual and pitch information test data.
ChunksFileReader CreateLpResidualAndPitchInfoReader();
// Creates a reader for the sequence of GRU input vectors.
std::unique_ptr<FileReader> CreateGruInputReader();
// Creates a reader for the VAD probabilities test data.
std::unique_ptr<FileReader> CreateVadProbsReader();
// Class to retrieve a test pitch buffer content and the expected output for the
// analysis steps.
class PitchTestData {
public:
PitchTestData();
~PitchTestData();
ArrayView<const float, kBufSize24kHz> PitchBuffer24kHzView() const {
return pitch_buffer_24k_;
}
ArrayView<const float, kRefineNumLags24kHz> SquareEnergies24kHzView() const {
return square_energies_24k_;
}
ArrayView<const float, kNumLags12kHz> AutoCorrelation12kHzView() const {
return auto_correlation_12k_;
}
private:
std::array<float, kBufSize24kHz> pitch_buffer_24k_;
std::array<float, kRefineNumLags24kHz> square_energies_24k_;
std::array<float, kNumLags12kHz> auto_correlation_12k_;
};
// Writer for binary files.
class FileWriter {
public:
explicit FileWriter(absl::string_view file_path)
: os_(std::string(file_path), std::ios::binary) {}
FileWriter(const FileWriter&) = delete;
FileWriter& operator=(const FileWriter&) = delete;
~FileWriter() = default;
void WriteChunk(ArrayView<const float> value) {
const std::streamsize bytes_to_write = value.size() * sizeof(float);
os_.write(reinterpret_cast<const char*>(value.data()), bytes_to_write);
}
private:
std::ofstream os_;
};
} // namespace rnn_vad
} // namespace webrtc
#endif // MODULES_AUDIO_PROCESSING_AGC2_RNN_VAD_TEST_UTILS_H_
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