nnet3-get-egs-simple.cc
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// nnet3bin/nnet3-get-egs-simple.cc
// Copyright 2017 Johns Hopkins University (author: Daniel Povey)
// 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 <sstream>
#include "base/kaldi-common.h"
#include "util/common-utils.h"
#include "hmm/transition-model.h"
#include "hmm/posterior.h"
#include "nnet3/nnet-example.h"
#include "nnet3/nnet-example-utils.h"
namespace kaldi {
// This function attempts to split a command-line argument of the
// form 'name=rspecifier', on the first equals sign. Will
// call KALDI_ERR if something seems wrong.
void SplitArgOnEquals(const std::string &arg,
std::string *name,
std::string *rspecifier) {
size_t pos = arg.find_first_of('=');
if (pos == std::string::npos) {
KALDI_ERR << "Bad command line argument (expecting '='): "
<< arg;
}
*name = std::string(arg, 0, pos);
*rspecifier = std::string(arg, pos + 1);
if (!IsToken(*name)) {
KALDI_ERR << "Bad command line argument (expecting a valid name before '='): "
<< arg;
}
if (ClassifyRspecifier(*rspecifier, NULL, NULL) == kNoRspecifier) {
KALDI_ERR << "Bad command line argument (expecting an rspecifier after '='): "
<< arg;
}
}
} // namespace kaldi
int main(int argc, char *argv[]) {
try {
using namespace kaldi;
using namespace kaldi::nnet3;
typedef kaldi::int32 int32;
typedef kaldi::int64 int64;
const char *usage =
"Get frame-by-frame examples of data for nnet3 neural network training.\n"
"This is like nnet3-get-egs, but does not split up its inputs into pieces\n"
"and allows more general generation of egs. E.g. this is usable for image\n"
"recognition tasks.\n"
"\n"
"Usage: nnet3-get-egs-simple [options] <name1>=<rspecifier1> "
"<name2>=<rspecifier2> ...\n"
"\n"
"e.g.:\n"
"nnet3-get-egs-simple input=scp:images.scp \\\n"
"output='ark,o:ali-to-post ark:labels.txt ark:- | post-to-smat --dim=10 ark:- ark:-' ark:egs.ark\n"
"\n"
"See also: nnet3-get-egs\n";
ParseOptions po(usage);
po.Read(argc, argv);
if (po.NumArgs() < 2) {
po.PrintUsage();
exit(1);
}
std::string examples_wspecifier = po.GetArg(po.NumArgs());
NnetExampleWriter example_writer(examples_wspecifier);
std::string first_name, first_reader_name;
SplitArgOnEquals(po.GetArg(1), &first_name, &first_reader_name);
SequentialGeneralMatrixReader first_reader(first_reader_name);
std::vector<std::string> other_names;
std::vector<RandomAccessGeneralMatrixReader*> other_readers;
for (int32 i = 2; i < po.NumArgs(); i++) {
std::string name, rspecifier;
SplitArgOnEquals(po.GetArg(i), &name, &rspecifier);
other_names.push_back(name);
other_readers.push_back(new RandomAccessGeneralMatrixReader(rspecifier));
}
int32 num_done = 0, num_err = 0;
for (; !first_reader.Done(); first_reader.Next()) {
std::string key = first_reader.Key();
NnetExample eg;
const GeneralMatrix &feats = first_reader.Value();
int32 t = 0; // first 't' value; each row of the matrix gets
// its own 't' value.
eg.io.push_back(NnetIo(first_name, t, feats));
bool all_ok = true;
for (size_t i = 0; i < other_names.size(); i++) {
if (!other_readers[i]->HasKey(key)) {
KALDI_WARN << "Could not find input for key " << key
<< " for io-name=" << other_names[i];
all_ok = false;
break;
}
const GeneralMatrix &other_feats = other_readers[i]->Value(key);
eg.io.push_back(NnetIo(other_names[i], t, other_feats));
}
if (!all_ok) {
num_err++;
} else {
example_writer.Write(key, eg);
num_done++;
}
}
if (num_err > 0)
KALDI_WARN << num_err << " utterances had errors and could "
"not be processed.";
return (num_done > 0 ? 0 : 1);
} catch(const std::exception &e) {
std::cerr << e.what() << '\n';
return -1;
}
}