Generic Seq2Seq Decoder preparation

Modules.make

@@ -69,13 +69,14 @@ MODULES += MODULE_THEANO_INTERFACE
 MODULES += MODULE_PYTHON
 
 # ****** OpenFst ******
- MODULES += MODULE_OPENFST
+MODULES += MODULE_OPENFST
 
 # ****** Search ******
- MODULES += MODULE_SEARCH_MBR
- MODULES += MODULE_SEARCH_WFST
+MODULES += MODULE_SEARCH_MBR
+MODULES += MODULE_SEARCH_WFST
 MODULES += MODULE_SEARCH_LINEAR
 MODULES += MODULE_ADVANCED_TREE_SEARCH
+MODULES += MODULE_GENERIC_SEQ2SEQ_TREE_SEARCH
 
 # ****** Signal ******
 MODULES += MODULE_SIGNAL_GAMMATONE
@@ -151,3 +152,6 @@ endif
 ifdef MODULE_ADVANCED_TREE_SEARCH
 LIBS_SEARCH += src/Search/AdvancedTreeSearch/libSprintAdvancedTreeSearch.$(a)
 endif
+ifdef MODULE_GENERIC_SEQ2SEQ_TREE_SEARCH
+LIBS_SEARCH += src/Search/GenericSeq2SeqTreeSearch/libSprintGenericSeq2SeqTreeSearch.$(a)
+endif

src/Flf/SegmentwiseSpeechProcessor.cc

@@ -20,8 +20,11 @@
 namespace Flf {
 
 // -------------------------------------------------------------------------
-AcousticModelRef getAm(const Core::Configuration& config) {
-    return Am::Module::instance().createAcousticModel(config, Bliss::LexiconRef(Lexicon::us()));
+AcousticModelRef getAm(const Core::Configuration& config, bool useMixture) {
+    if (useMixture)
+        return Am::Module::instance().createAcousticModel(config, Bliss::LexiconRef(Lexicon::us()));
+    else
+        return Am::Module::instance().createAcousticModel(config, Bliss::LexiconRef(Lexicon::us()), Am::AcousticModel::noEmissions);
 }
 
 ScaledLanguageModelRef getLm(const Core::Configuration& config) {

src/Flf/SegmentwiseSpeechProcessor.hh

@@ -38,7 +38,7 @@ typedef Core::Ref<Lm::LanguageModel>        LanguageModelRef;
 typedef Core::Ref<Lm::ScaledLanguageModel>  ScaledLanguageModelRef;
 typedef Core::Ref<Speech::ModelCombination> ModelCombinationRef;
 
-AcousticModelRef       getAm(const Core::Configuration& config);
+AcousticModelRef       getAm(const Core::Configuration& config, bool useMixture=true);
 ScaledLanguageModelRef getLm(const Core::Configuration& config);
 ModelCombinationRef    getModelCombination(const Core::Configuration& config, AcousticModelRef acousticModel, ScaledLanguageModelRef languageModel = ScaledLanguageModelRef());
 

src/Lattice/Lattice.cc

@@ -193,18 +193,32 @@ Speech::TimeframeIndex WordLattice::maximumTime() const {
     return d.getMaximumTime();
 }
 
-StandardWordLattice::StandardWordLattice(Core::Ref<const Bliss::Lexicon> lexicon) {
+StandardWordLattice::StandardWordLattice(Core::Ref<const Bliss::Lexicon>   lexicon,
+                                         AlphabetType alphabetType)
+        : alphabetType_(alphabetType) {
     parts_.addChoice("acoustic", 0);
     parts_.addChoice("lm", 1);
 
     acoustic_ = Core::ref(new Fsa::StaticAutomaton);
-    acoustic_->setType(Fsa::TypeAcceptor);
-    acoustic_->setInputAlphabet(lexicon->lemmaPronunciationAlphabet());
-    acoustic_->setSemiring(Fsa::TropicalSemiring);
+    lm_       = Core::ref(new Fsa::StaticAutomaton);
 
-    lm_ = Core::ref(new Fsa::StaticAutomaton);
+    acoustic_->setType(Fsa::TypeAcceptor);
     lm_->setType(Fsa::TypeAcceptor);
-    lm_->setInputAlphabet(lexicon->lemmaPronunciationAlphabet());
+
+    switch (alphabetType_) {
+        case AlphabetType::LemmaAlphabet:
+            acoustic_->setInputAlphabet(lexicon->lemmaAlphabet());
+            lm_->setInputAlphabet(lexicon->lemmaAlphabet());
+            break;
+        case AlphabetType::LemmaPronunciationAlphabet:
+            acoustic_->setInputAlphabet(lexicon->lemmaPronunciationAlphabet());
+            lm_->setInputAlphabet(lexicon->lemmaPronunciationAlphabet());
+            break;
+        default:
+            defect();
+    }
+
+    acoustic_->setSemiring(Fsa::TropicalSemiring);
     lm_->setSemiring(Fsa::TropicalSemiring);
 
     fsas_.push_back(acoustic_);
@@ -226,17 +240,31 @@ Fsa::State* StandardWordLattice::newState() {
     return acoustic_->newState();
 }
 
+void StandardWordLattice::newArc(
+        Fsa::State* source,
+        Fsa::State* target,
+        Fsa::LabelId id,
+        Speech::Score acoustic, Speech::Score lm) {
+    source -> newArc(target->id(), Fsa::Weight(acoustic), id);
+    lm_->state(source->id())->newArc(target->id(), Fsa::Weight(lm), id);
+}
+
 void StandardWordLattice::newArc(
         Fsa::State*                      source,
         Fsa::State*                      target,
         const Bliss::LemmaPronunciation* lemmaPronunciation,
         Speech::Score acoustic, Speech::Score lm) {
-    source->newArc(
-            target->id(),
-            Fsa::Weight(acoustic),
-            (lemmaPronunciation) ? lemmaPronunciation->id() : Fsa::Epsilon);
+    Fsa::LabelId id = lemmaPronunciation ? lemmaPronunciation->id() : Fsa::Epsilon;
+    newArc(source, target, id, acoustic, lm);
+}
 
-    lm_->state(source->id())->newArc(target->id(), Fsa::Weight(lm), (lemmaPronunciation) ? lemmaPronunciation->id() : Fsa::Epsilon);
+void StandardWordLattice::newArc(
+        Fsa::State* source,
+        Fsa::State* target,
+        const Bliss::Lemma* lemma,
+        Speech::Score acoustic, Speech::Score lm) {
+    Fsa::LabelId id = lemma ? lemma->id() : Fsa::Epsilon;
+    newArc(source, target, id, acoustic, lm);
 }
 
 void StandardWordLattice::addAcyclicProperty() {

src/Lattice/Lattice.hh

@@ -268,12 +268,24 @@ public:
  * near future, when the WordLattice interface is refactored.
  */
 class StandardWordLattice : public WordLattice {
+public:
+    enum class AlphabetType {
+        LemmaAlphabet              = 1,
+        LemmaPronunciationAlphabet = 2
+    };
+
 private:
     Core::Ref<Fsa::StaticAutomaton> acoustic_, lm_;
     Fsa::State *                    initialState_, *finalState_;
+    AlphabetType                    alphabetType_;
+
+    void newArc(Fsa::State* source,
+                Fsa::State* target,
+                Fsa::LabelId id,
+                Speech::Score acoustic, Speech::Score lm);
 
 public:
-    StandardWordLattice(Bliss::LexiconRef);
+    StandardWordLattice(Bliss::LexiconRef, AlphabetType alphabetType = AlphabetType::LemmaAlphabet);
 
     Fsa::State* newState();
     Fsa::State* initialState() {
@@ -288,6 +300,11 @@ public:
                 const Bliss::LemmaPronunciation*,
                 Speech::Score acoustic, Speech::Score lm);
 
+    void newArc(Fsa::State *source,
+                Fsa::State *target,
+                const Bliss::Lemma*,
+                Speech::Score acoustic, Speech::Score lm);
+
     void addAcyclicProperty();
 };
 

src/Nn/LabelScorer.cc

@@ -0,0 +1,18 @@
+/** Copyright 2020 RWTH Aachen University. All rights reserved.
+ *
+ *  Licensed under the RWTH ASR License (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.hltpr.rwth-aachen.de/rwth-asr/rwth-asr-license.html
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+#include "LabelScorer.hh"
+
+using namespace Nn;

src/Nn/LabelScorer.hh

@@ -0,0 +1,32 @@
+/** Copyright 2020 RWTH Aachen University. All rights reserved.
+ *
+ *  Licensed under the RWTH ASR License (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.hltpr.rwth-aachen.de/rwth-asr/rwth-asr-license.html
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+#ifndef LABEL_SCORER_HH
+#define LABEL_SCORER_HH
+
+#include <Core/Component.hh>
+#include <Core/ReferenceCounting.hh>
+
+namespace Nn {
+
+
+// base class of models for label scoring (basic supports except scoring)
+class LabelScorer : public virtual Core::Component,
+                    public Core::ReferenceCounted {
+};
+
+}  // namespace Nn
+
+#endif

src/Nn/Makefile

@@ -77,6 +77,17 @@ ifdef MODULE_PYTHON
   LIBSPRINTNN_O += $(OBJDIR)/PythonLayer.o
 endif
 
+ifdef MODULE_GENERIC_SEQ2SEQ_TREE_SEARCH
+  LIBSPRINTNN_O += $(OBJDIR)/LabelScorer.o
+  ifdef MODULE_TENSORFLOW
+    LIBSPRINTNN_O += $(OBJDIR)/TFLabelScorer.o
+
+    CXXFLAGS += $(TF_CXXFLAGS)
+    LDFLAGS  += $(TF_LDFLAGS)
+    CHECK_O  += ../Tensorflow/libSprintTensorflow.$(a)
+  endif
+endif
+
 # -----------------------------------------------------------------------------
 all: $(TARGETS)
 

src/Nn/Module.cc

@@ -34,6 +34,13 @@
 #include "PythonFeatureScorer.hh"
 #endif
 
+#ifdef MODULE_GENERIC_SEQ2SEQ_TREE_SEARCH
+#include "LabelScorer.hh"
+#ifdef MODULE_TENSORFLOW
+#include "TFLabelScorer.hh"
+#endif
+#endif
+
 using namespace Nn;
 
 Module_::Module_()
@@ -80,3 +87,13 @@ Core::FormatSet& Module_::formats() {
     }
     return *formats_;
 }
+
+
+Core::Ref<LabelScorer> Module_::createLabelScorer(const Core::Configuration& config) const {
+#ifdef MODULE_GENERIC_SEQ2SEQ_TREE_SEARCH
+  LabelScorer* labelScorer = nullptr;
+  return Core::ref(labelScorer);
+#else
+  Core::Application::us()->criticalError("Module MODULE_GENERIC_SEQ2SEQ_TREE_SEARCH not available!");
+#endif
+}

src/Nn/Module.hh

@@ -26,6 +26,8 @@ class FormatSet;
 
 namespace Nn {
 
+class LabelScorer;
+
 class Module_ {
 private:
     Core::FormatSet* formats_;
@@ -47,6 +49,8 @@ public:
     /** Set of file format class.
      */
     Core::FormatSet& formats();
+
+    Core::Ref<LabelScorer> createLabelScorer(const Core::Configuration& config) const;
 };
 
 typedef Core::SingletonHolder<Module_> Module;

src/Nn/TFLabelScorer.cc

@@ -0,0 +1,18 @@
+/** Copyright 2020 RWTH Aachen University. All rights reserved.
+ *
+ *  Licensed under the RWTH ASR License (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.hltpr.rwth-aachen.de/rwth-asr/rwth-asr-license.html
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+#include "TFLabelScorer.hh"
+
+using namespace Nn;

src/Nn/TFLabelScorer.hh

@@ -0,0 +1,27 @@
+/** Copyright 2020 RWTH Aachen University. All rights reserved.
+ *
+ *  Licensed under the RWTH ASR License (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.hltpr.rwth-aachen.de/rwth-asr/rwth-asr-license.html
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+#ifndef TF_LABEL_SCORER_HH
+#define TF_LABEL_SCORER_HH
+
+#include "LabelScorer.hh"
+
+namespace Nn {
+
+
+} // namesapce
+
+#endif
+

src/Search/AdvancedTreeSearch/AdvancedTreeSearch.cc

@@ -471,7 +471,7 @@ Core::Ref<const LatticeAdaptor> AdvancedTreeSearchManager::buildLatticeForTrace(
         wordBoundaries->set((Fsa::StateId) /* WARNING: this looses a few bits */ (long)result->initialState(), Lattice::WordBoundary(0));
         Fsa::State* finalState = result->newState();
         wordBoundaries->set(finalState->id(), Lattice::WordBoundary(time_));
-        result->newArc(result->initialState(), finalState, 0, 0, 0);
+        result->newArc(result->initialState(), finalState, static_cast<const Bliss::LemmaPronunciation*>(nullptr), 0, 0);
         result->setWordBoundaries(wordBoundaries);
         result->addAcyclicProperty();
         return Core::ref(new Lattice::WordLatticeAdaptor(result));

src/Search/GenericSeq2SeqTreeSearch/Makefile

@@ -0,0 +1,36 @@
+#!gmake
+
+TOPDIR		= ../../..
+
+include $(TOPDIR)/Makefile.cfg
+
+# -----------------------------------------------------------------------------
+
+SUBDIRS		=
+TARGETS		= libSprintGenericSeq2SeqTreeSearch.$(a)
+
+LIBSPRINTSEQ2SEQTREESEARCH_O = $(OBJDIR)/Seq2SeqTreeSearch.o \
+                               $(OBJDIR)/Seq2SeqAligner.o
+
+ifeq ($(OS),darwin)
+CCFLAGS += -fexceptions
+endif
+
+# These flags make the compilation slow, but are required to inline some critical functions in SearchSpace (copied from AdvancedTreeSearch)
+CCFLAGS += -Wno-sign-compare -Winline --param max-inline-insns-auto=10000 --param max-inline-insns-single=10000 --param large-function-growth=25000 --param inline-unit-growth=400
+CXXFLAGS += -Wno-sign-compare -Winline --param max-inline-insns-auto=10000 --param max-inline-insns-single=10000 --param large-function-growth=25000 --param inline-unit-growth=400
+
+# -----------------------------------------------------------------------------
+
+all: $(TARGETS)
+
+libSprintGenericSeq2SeqTreeSearch.$(a): $(LIBSPRINTSEQ2SEQTREESEARCH_O)
+	$(MAKELIB) $@ $^
+
+check$(exe): $(CHECK_O)
+	$(LD) $(CHECK_O) -o check$(exe) $(LDFLAGS)
+
+include $(TOPDIR)/Rules.make
+
+sinclude $(LIBSPRINTSEQ2SEQTREESEARCH_O:.o=.d)
+include $(patsubst %.o,%.d,$(filter %.o,$(CHECK_O)))

src/Search/GenericSeq2SeqTreeSearch/Seq2SeqAligner.cc

@@ -0,0 +1,18 @@
+/** Copyright 2020 RWTH Aachen University. All rights reserved.
+ *
+ *  Licensed under the RWTH ASR License (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.hltpr.rwth-aachen.de/rwth-asr/rwth-asr-license.html
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+#include "Seq2SeqAligner.hh"
+
+using namespace Search;