Initial commit: FunASR Speech Recognition Toolkit

Add complete FunASR codebase including models, runtime, and documentation.

runtime/onnxruntime/third_party/kaldi/itf/context-dep-itf.h

@@ -0,0 +1,114 @@
+// itf/context-dep-itf.h
+
+// Copyright 2009-2011     Microsoft Corporation;  Go Vivace Inc.
+
+// 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_ITF_CONTEXT_DEP_ITF_H_
+#define KALDI_ITF_CONTEXT_DEP_ITF_H_
+#include "base/kaldi-common.h"
+
+namespace kaldi {
+/// @ingroup tree_group
+/// @{
+
+/// context-dep-itf.h provides a link between
+/// the tree-building code in ../tree/, and the FST code in ../fstext/
+/// (particularly, ../fstext/context-dep.h).  It is an abstract
+/// interface that describes an object that can map from a
+/// phone-in-context to a sequence of integer leaf-ids.
+class ContextDependencyInterface {
+ public:
+  /// ContextWidth() returns the value N (e.g. 3 for triphone models) that says how many phones
+  ///   are considered for computing context.
+  virtual int ContextWidth() const = 0;
+
+  /// Central position P of the phone context, in 0-based numbering, e.g. P = 1 for typical
+  /// triphone system.  We have to see if we can do without this function.
+  virtual int CentralPosition() const = 0;
+
+  /// The "new" Compute interface.  For typical topologies,
+  /// pdf_class would be 0, 1, 2.
+  /// Returns success or failure; outputs the pdf-id.
+  ///
+  /// "Compute" is the main function of this interface, that takes a
+  /// sequence of N phones (and it must be N phones), possibly
+  /// including epsilons (symbol id zero) but only at positions other
+  /// than P [these represent unknown phone context due to end or
+  /// begin of sequence].  We do not insist that Compute must always
+  /// output (into stateseq) a nonempty sequence of states, but we
+  /// anticipate that stateseq will always be nonempty at output in
+  /// typical use cases.  "Compute" returns false if expansion somehow
+  /// failed.  Normally the calling code should raise an exception if
+  /// this happens.  We can define a different interface later in
+  /// order to handle other kinds of information-- the underlying
+  /// data-structures from event-map.h are very flexible.
+  virtual bool Compute(const std::vector<int32> &phoneseq, int32 pdf_class,
+                       int32 *pdf_id) const = 0;
+
+  /// GetPdfInfo returns a vector indexed by pdf-id, saying for each pdf which
+  /// pairs of (phone, pdf-class) it can correspond to.  (Usually just one).
+  /// c.f. hmm/hmm-topology.h for meaning of pdf-class.
+  /// This is the old, simpler interface of GetPdfInfo(), and that this one can
+  /// only be called if the HmmTopology object's IsHmm() function call returns
+  /// true.
+  virtual void GetPdfInfo(
+      const std::vector<int32> &phones,  // list of phones
+      const std::vector<int32> &num_pdf_classes,  // indexed by phone,
+      std::vector<std::vector<std::pair<int32, int32> > > *pdf_info)
+      const = 0;
+
+  /// This function outputs information about what possible pdf-ids can
+  /// be generated for HMM-states; it covers the general case where
+  /// the self-loop pdf-class may be different from the forward-transition
+  /// pdf-class, so we are asking not about the set of possible pdf-ids
+  /// for a given (phone, pdf-class), but the set of possible ordered pairs
+  /// (forward-transition-pdf, self-loop-pdf) for a given (phone,
+  /// forward-transition-pdf-class, self-loop-pdf-class).
+  /// Note: 'phones' is a list of integer ids of phones, and
+  /// 'pdf-class-pairs', indexed by phone, is a list of pairs
+  /// (forward-transition-pdf-class, self-loop-pdf-class) that we can have for
+  /// that phone.
+  /// The output 'pdf_info' is indexed first by phone and then by the
+  /// same index that indexes each element of 'pdf_class_pairs',
+  /// and tells us for each pair in 'pdf_class_pairs', what is the
+  /// list of possible (forward-transition-pdf-id, self-loop-pdf-id) that
+  /// we can have.
+  /// This is less efficient than the other version of GetPdfInfo().
+  virtual void GetPdfInfo(
+      const std::vector<int32> &phones,
+      const std::vector<std::vector<std::pair<int32, int32> > > &pdf_class_pairs,
+      std::vector<std::vector<std::vector<std::pair<int32, int32> > > > *pdf_info)
+      const = 0;
+
+
+  /// NumPdfs() returns the number of acoustic pdfs (they are numbered 0.. NumPdfs()-1).
+  virtual int32 NumPdfs() const = 0;
+
+  virtual ~ContextDependencyInterface() {};
+  ContextDependencyInterface() {}
+
+  /// Returns pointer to new object which is copy of current one.
+  virtual ContextDependencyInterface *Copy() const = 0;
+ private:
+  KALDI_DISALLOW_COPY_AND_ASSIGN(ContextDependencyInterface);
+};
+/// @}
+}  // namespace Kaldi
+
+
+#endif