feature-plp-test.cc
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// feat/feature-plp-test.cc
// Copyright 2009-2011 Karel Vesely; Petr Motlicek
// See ../../COPYING for clarification regarding multiple authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// THIS CODE IS PROVIDED *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
// WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,
// MERCHANTABLITY OR NON-INFRINGEMENT.
// See the Apache 2 License for the specific language governing permissions and
// limitations under the License.
#include <iostream>
#include "feat/feature-plp.h"
#include "base/kaldi-math.h"
#include "matrix/kaldi-matrix-inl.h"
#include "feat/wave-reader.h"
using namespace kaldi;
/**
*/
static void UnitTestSimple() {
std::cout << "=== UnitTestSimple() ===\n";
Vector<BaseFloat> v(100000);
Matrix<BaseFloat> m;
// init with noise
for (int32 i = 0; i < v.Dim(); i++) {
v(i) = (abs( i * 433024253 ) % 65535) - (65535 / 2);
}
std::cout << "<<<=== Just make sure it runs... Nothing is compared\n";
// the parametrization object
PlpOptions op;
// trying to have same opts as baseline.
op.frame_opts.dither = 0.0;
op.frame_opts.preemph_coeff = 0.0;
op.frame_opts.window_type = "rectangular";
op.frame_opts.remove_dc_offset = false;
op.frame_opts.round_to_power_of_two = true;
op.mel_opts.low_freq = 0.0;
// op.htk_compat = true;
Plp plp(op);
// use default parameters
// compute mfccs.
plp.Compute(v, 1.0, &m);
// possibly dump
// std::cout << "== Output features == \n" << m;
std::cout << "Test passed :)\n\n";
}
static void UnitTestHTKCompare1() {
std::cout << "=== UnitTestHTKCompare1() ===\n";
std::ifstream is("test_data/test.wav", std::ios_base::binary);
WaveData wave;
wave.Read(is);
KALDI_ASSERT(wave.Data().NumRows() == 1);
SubVector<BaseFloat> waveform(wave.Data(), 0);
// read the HTK features
Matrix<BaseFloat> htk_features;
{
std::ifstream is("test_data/test.wav.plp_htk.1",
std::ios::in | std::ios_base::binary);
bool ans = ReadHtk(is, &htk_features, 0);
KALDI_ASSERT(ans);
}
// use plp with default configuration...
PlpOptions op;
op.frame_opts.dither = 0.0;
op.frame_opts.preemph_coeff = 0.0;
op.frame_opts.window_type = "hamming";
op.frame_opts.remove_dc_offset = false;
op.frame_opts.round_to_power_of_two = true;
op.mel_opts.low_freq = 0.0;
op.htk_compat = true;
op.use_energy = false; // C0 not energy.
op.cepstral_scale = 1.0;
Plp plp(op);
// calculate kaldi features
Matrix<BaseFloat> kaldi_raw_features;
plp.Compute(waveform, 1.0, &kaldi_raw_features);
DeltaFeaturesOptions delta_opts;
Matrix<BaseFloat> kaldi_features;
ComputeDeltas(delta_opts,
kaldi_raw_features,
&kaldi_features);
// compare the results
bool passed = true;
int32 i_old = -1;
KALDI_ASSERT(kaldi_features.NumRows() == htk_features.NumRows());
KALDI_ASSERT(kaldi_features.NumCols() == htk_features.NumCols());
// Ignore ends-- we make slightly different choices than
// HTK about how to treat the deltas at the ends.
for (int32 i = 10; i+10 < kaldi_features.NumRows(); i++) {
for (int32 j = 0; j < kaldi_features.NumCols(); j++) {
BaseFloat a = kaldi_features(i, j), b = htk_features(i, j);
if ((std::abs(b - a)) > 0.10) { //<< TOLERANCE TO DIFFERENCES!!!!!
// print the non-matching data only once per-line
if (i_old != i) {
std::cout << "\n\n\n[HTK-row: " << i << "] " << htk_features.Row(i) << "\n";
std::cout << "[Kaldi-row: " << i << "] " << kaldi_features.Row(i) << "\n\n\n";
i_old = i;
}
// print indices of non-matching cells
std::cout << "[" << i << ", " << j << "]";
passed = false;
}}}
if (!passed) KALDI_ERR << "Test failed";
// write the htk features for later inspection
HtkHeader header = {
kaldi_features.NumRows(),
100000, // 10ms
static_cast<int16>(sizeof(float)*kaldi_features.NumCols()),
021413 // PLP_D_A_0
};
{
std::ofstream os("tmp.test.wav.plp_kaldi.1",
std::ios::out|std::ios::binary);
WriteHtk(os, kaldi_features, header);
}
std::cout << "Test passed :)\n\n";
unlink("tmp.test.wav.plp_kaldi.1");
}
static void UnitTestFeat() {
UnitTestSimple();
UnitTestHTKCompare1();
}
int main() {
try {
for (int i = 0; i < 5; i++)
UnitTestFeat();
std::cout << "Tests succeeded.\n";
return 0;
} catch (const std::exception &e) {
std::cerr << e.what();
return 1;
}
}