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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/test_utils.h"
#include <algorithm>
#include <fstream>
#include <memory>
#include <string>
#include <type_traits>
#include <vector>
#include "absl/strings/string_view.h"
#include "rtc_base/checks.h"
#include "rtc_base/numerics/safe_compare.h"
#include "test/gtest.h"
#include "test/testsupport/file_utils.h"
namespace webrtc {
namespace rnn_vad {
namespace {
// File reader for binary files that contain a sequence of values with
// arithmetic type `T`. The values of type `T` that are read are cast to float.
template <typename T>
class FloatFileReader : public FileReader {
public:
static_assert(std::is_arithmetic<T>::value, "");
explicit FloatFileReader(absl::string_view filename)
: is_(std::string(filename), std::ios::binary | std::ios::ate),
size_(is_.tellg() / sizeof(T)) {
RTC_CHECK(is_);
SeekBeginning();
}
FloatFileReader(const FloatFileReader&) = delete;
FloatFileReader& operator=(const FloatFileReader&) = delete;
~FloatFileReader() = default;
int size() const override { return size_; }
bool ReadChunk(ArrayView<float> dst) override {
const std::streamsize bytes_to_read = dst.size() * sizeof(T);
if (std::is_same<T, float>::value) {
is_.read(reinterpret_cast<char*>(dst.data()), bytes_to_read);
} else {
buffer_.resize(dst.size());
is_.read(reinterpret_cast<char*>(buffer_.data()), bytes_to_read);
std::transform(buffer_.begin(), buffer_.end(), dst.begin(),
[](const T& v) -> float { return static_cast<float>(v); });
}
return is_.gcount() == bytes_to_read;
}
bool ReadValue(float& dst) override { return ReadChunk({&dst, 1}); }
void SeekForward(int hop) override { is_.seekg(hop * sizeof(T), is_.cur); }
void SeekBeginning() override { is_.seekg(0, is_.beg); }
private:
std::ifstream is_;
const int size_;
std::vector<T> buffer_;
};
} // namespace
using test::ResourcePath;
void ExpectEqualFloatArray(ArrayView<const float> expected,
ArrayView<const float> computed) {
ASSERT_EQ(expected.size(), computed.size());
for (int i = 0; SafeLt(i, expected.size()); ++i) {
SCOPED_TRACE(i);
EXPECT_FLOAT_EQ(expected[i], computed[i]);
}
}
void ExpectNearAbsolute(ArrayView<const float> expected,
ArrayView<const float> computed,
float tolerance) {
ASSERT_EQ(expected.size(), computed.size());
for (int i = 0; SafeLt(i, expected.size()); ++i) {
SCOPED_TRACE(i);
EXPECT_NEAR(expected[i], computed[i], tolerance);
}
}
std::unique_ptr<FileReader> CreatePcmSamplesReader() {
return std::make_unique<FloatFileReader<int16_t>>(
/*filename=*/test::ResourcePath("audio_processing/agc2/rnn_vad/samples",
"pcm"));
}
ChunksFileReader CreatePitchBuffer24kHzReader() {
auto reader = std::make_unique<FloatFileReader<float>>(
/*filename=*/test::ResourcePath(
"audio_processing/agc2/rnn_vad/pitch_buf_24k", "dat"));
const int num_chunks = CheckedDivExact(reader->size(), kBufSize24kHz);
return {/*chunk_size=*/kBufSize24kHz, num_chunks, std::move(reader)};
}
ChunksFileReader CreateLpResidualAndPitchInfoReader() {
constexpr int kPitchInfoSize = 2; // Pitch period and strength.
constexpr int kChunkSize = kBufSize24kHz + kPitchInfoSize;
auto reader = std::make_unique<FloatFileReader<float>>(
/*filename=*/test::ResourcePath(
"audio_processing/agc2/rnn_vad/pitch_lp_res", "dat"));
const int num_chunks = CheckedDivExact(reader->size(), kChunkSize);
return {kChunkSize, num_chunks, std::move(reader)};
}
std::unique_ptr<FileReader> CreateGruInputReader() {
return std::make_unique<FloatFileReader<float>>(
/*filename=*/test::ResourcePath("audio_processing/agc2/rnn_vad/gru_in",
"dat"));
}
std::unique_ptr<FileReader> CreateVadProbsReader() {
return std::make_unique<FloatFileReader<float>>(
/*filename=*/test::ResourcePath("audio_processing/agc2/rnn_vad/vad_prob",
"dat"));
}
PitchTestData::PitchTestData() {
FloatFileReader<float> reader(
/*filename=*/ResourcePath(
"audio_processing/agc2/rnn_vad/pitch_search_int", "dat"));
reader.ReadChunk(pitch_buffer_24k_);
reader.ReadChunk(square_energies_24k_);
reader.ReadChunk(auto_correlation_12k_);
// Reverse the order of the squared energy values.
// Required after the WebRTC CL 191703 which switched to forward computation.
std::reverse(square_energies_24k_.begin(), square_energies_24k_.end());
}
PitchTestData::~PitchTestData() = default;
} // namespace rnn_vad
} // namespace webrtc
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