gmm-latgen-simple.cc
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// gmmbin/gmm-latgen-simple.cc
// Copyright 2009-2011 Microsoft Corporation
// 2013 Johns Hopkins University (author: Daniel Povey)
// 2014 Guoguo Chen
// 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 "base/kaldi-common.h"
#include "util/common-utils.h"
#include "gmm/am-diag-gmm.h"
#include "tree/context-dep.h"
#include "hmm/transition-model.h"
#include "fstext/fstext-lib.h"
#include "decoder/decoder-wrappers.h"
#include "gmm/decodable-am-diag-gmm.h"
#include "base/timer.h"
int main(int argc, char *argv[]) {
try {
using namespace kaldi;
typedef kaldi::int32 int32;
using fst::SymbolTable;
using fst::Fst;
using fst::StdArc;
const char *usage =
"Generate lattices using GMM-based model.\n"
"Usage: gmm-latgen-simple [options] model-in fst-in features-rspecifier"
" lattice-wspecifier [ words-wspecifier [alignments-wspecifier] ]\n";
ParseOptions po(usage);
Timer timer;
bool allow_partial = false;
BaseFloat acoustic_scale = 0.1;
LatticeSimpleDecoderConfig config;
std::string word_syms_filename;
config.Register(&po);
po.Register("acoustic-scale", &acoustic_scale, "Scaling factor for acoustic likelihoods");
po.Register("word-symbol-table", &word_syms_filename, "Symbol table for words [for debug output]");
po.Register("allow-partial", &allow_partial, "If true, produce output even if end state was not reached.");
po.Read(argc, argv);
if (po.NumArgs() < 4 || po.NumArgs() > 6) {
po.PrintUsage();
exit(1);
}
std::string model_in_filename = po.GetArg(1),
fst_in_filename = po.GetArg(2),
feature_rspecifier = po.GetArg(3),
lattice_wspecifier = po.GetArg(4),
words_wspecifier = po.GetOptArg(5),
alignment_wspecifier = po.GetOptArg(6);
TransitionModel trans_model;
AmDiagGmm am_gmm;
{
bool binary;
Input ki(model_in_filename, &binary);
trans_model.Read(ki.Stream(), binary);
am_gmm.Read(ki.Stream(), binary);
}
Fst<StdArc> *decode_fst = fst::ReadFstKaldiGeneric(fst_in_filename);
bool determinize = config.determinize_lattice;
CompactLatticeWriter compact_lattice_writer;
LatticeWriter lattice_writer;
if (! (determinize ? compact_lattice_writer.Open(lattice_wspecifier)
: lattice_writer.Open(lattice_wspecifier)))
KALDI_ERR << "Could not open table for writing lattices: "
<< lattice_wspecifier;
Int32VectorWriter words_writer(words_wspecifier);
Int32VectorWriter alignment_writer(alignment_wspecifier);
fst::SymbolTable *word_syms = NULL;
if (word_syms_filename != "")
if (!(word_syms = fst::SymbolTable::ReadText(word_syms_filename)))
KALDI_ERR << "Could not read symbol table from file "
<< word_syms_filename;
SequentialBaseFloatMatrixReader feature_reader(feature_rspecifier);
BaseFloat tot_like = 0.0;
kaldi::int64 frame_count = 0;
int num_success = 0, num_fail = 0;
LatticeSimpleDecoder decoder(*decode_fst, config);
for (; !feature_reader.Done(); feature_reader.Next()) {
std::string utt = feature_reader.Key();
Matrix<BaseFloat> features (feature_reader.Value());
feature_reader.FreeCurrent();
if (features.NumRows() == 0) {
KALDI_WARN << "Zero-length utterance: " << utt;
num_fail++;
continue;
}
DecodableAmDiagGmmScaled gmm_decodable(am_gmm, trans_model, features,
acoustic_scale);
double like;
if (DecodeUtteranceLatticeSimple(
decoder, gmm_decodable, trans_model, word_syms, utt,
acoustic_scale, determinize, allow_partial, &alignment_writer,
&words_writer, &compact_lattice_writer, &lattice_writer, &like)) {
tot_like += like;
frame_count += features.NumRows();
num_success++;
} else num_fail++;
}
double elapsed = timer.Elapsed();
KALDI_LOG << "Time taken "<< elapsed
<< "s: real-time factor assuming 100 frames/sec is "
<< (elapsed*100.0/frame_count);
KALDI_LOG << "Done " << num_success << " utterances, failed for "
<< num_fail;
KALDI_LOG << "Overall log-likelihood per frame is " << (tot_like/frame_count) << " over "
<< frame_count<<" frames.";
delete decode_fst;
delete word_syms;
if (num_success != 0) return 0;
else return 1;
} catch(const std::exception &e) {
std::cerr << e.what();
return -1;
}
}