Initial commit: FunASR Speech Recognition Toolkit

Add complete FunASR codebase including models, runtime, and documentation.
2026-07-09 22:38:58 +08:00
commit 6116b1f3c6
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+// lat/phone-align-lattice.h
+
+// Copyright 2009-2012  Microsoft Corporation  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.
+
+#ifndef KALDI_LAT_PHONE_ALIGN_LATTICE_H_
+#define KALDI_LAT_PHONE_ALIGN_LATTICE_H_
+#include <fst/fstlib.h>
+#include <fst/fst-decl.h>
+
+#include "base/kaldi-common.h"
+#include "util/common-utils.h"
+#include "fstext/fstext-lib.h"
+#include "itf/transition-information.h"
+#include "lat/kaldi-lattice.h"
+
+namespace kaldi {
+
+
+struct PhoneAlignLatticeOptions {
+  bool reorder;
+  bool remove_epsilon;
+  bool replace_output_symbols;
+  PhoneAlignLatticeOptions(): reorder(true),
+                              remove_epsilon(true),
+                              replace_output_symbols(false) { }
+  void Register(OptionsItf *opts) {
+    opts->Register("reorder", &reorder, "True if lattice was created from HCLG with "
+                   "--reorder=true option.");
+    opts->Register("remove-epsilon", &remove_epsilon, "If true, removes epsilons from "
+                   "the phone lattice; if replace-output-symbols==false, this will "
+                   "mean that an arc can have multiple phones on it.");
+    opts->Register("replace-output-symbols", &replace_output_symbols, "If true, "
+                   "the output symbols (typically words) will be replaced with "
+                   "phones.");
+  }
+};
+
+/// Outputs a lattice in which the arcs correspond exactly to sequences of
+/// phones, so the boundaries between the arcs correspond to the boundaries
+/// between phones If remove-epsilon == false and replace-output-symbols ==
+/// false, but an arc may have >1 phone on it, but the boundaries will still
+/// correspond with the boundaries between phones.  Note: it's possible
+/// to have arcs with words on them but no transition-ids at all.  Returns true if
+/// everything was OK, false if some kind of error was detected (e.g. the
+/// "reorder" option was incorrectly specified.)
+bool PhoneAlignLattice(const CompactLattice &lat,
+                       const TransitionInformation &tmodel,
+                       const PhoneAlignLatticeOptions &opts,
+                       CompactLattice *lat_out);
+
+
+} // end namespace kaldi
+#endif