grammarmanager.cpp

OSB-PIK-OpenVXI-3.0.0源代码 “中国XML论坛 - 专业的XML技术讨论区--XML在语音技术中的应用”

 bool GrammarManager::FindMatchedElement(const vxistring & id,
                                         VXMLElement & match,
                                         unsigned long & grammarInfo) const
 {
   const VXIrecGrammar * bestGrammar = NULL;
 
   if (id.empty()) return false;
 
   VXIrecResult err = vxirec->GetMatchedGrammar(vxirec, id.c_str(),
                                                &bestGrammar);
   if (err != VXIrec_RESULT_SUCCESS) {
     log.LogError(420, SimpleLogger::MESSAGE,
                  L"function failed to return a grammar match");
     return false;
   }
 
   for (GRAMMARS::const_iterator i = grammars.begin(); i!=grammars.end(); ++i) {
     if ((*i)->GetRecGrammar() != bestGrammar) continue;
 
     if (!(*i)->IsEnabled()) {
       log.LogError(420, SimpleLogger::MESSAGE,
                    L"function returned an inactive grammar");
       return false;
     }
 
     (*i)->GetElement(match);
     grammarInfo = (*i)->GetSequence();
     return true;
   }
 
   for (UNIVERSALS::const_iterator j = universals.begin();
        j != universals.end(); ++j)
   {
     if ((*j)->GetRecGrammar() != bestGrammar) continue;
 
     if (!(*j)->IsEnabled()) {
       log.LogError(420, SimpleLogger::MESSAGE,
                    L"function returned an inactive grammar");
       return false;
     }
 
     (*j)->GetElement(match);
     grammarInfo = (*j)->GetSequence();
     return true;
   }
 
   log.LogError(420, SimpleLogger::MESSAGE,
                L"function returned a non-existent grammar");
   return false;
 }
 
 // compare the precedence of info1 against info2, return 1 if info1 has
 // higher precedence than info2, -1 otherwise, 0 if both has the same precedence
 int GrammarManager::CompareGrammar(const unsigned long grammar1,
                                    const unsigned long grammar2)
 {
   // Is either grammar an universal?
   bool firstIsUniversal = false;
   bool secondIsUniversal = false;
 	
   for (UNIVERSALS::const_iterator j = universals.begin();
        j != universals.end(); ++j)
   {
     unsigned long temp = (*j)->GetSequence();
     if (temp == grammar1) firstIsUniversal = true;
     if (temp == grammar2) secondIsUniversal = true;
   }
 
   if (firstIsUniversal && secondIsUniversal) {
     if (grammar1 < grammar2) return 1;
     if (grammar1 > grammar2) return -1;
     return 0;
   }
 
   if (firstIsUniversal) return 1;
   if (secondIsUniversal) return -1;
 
   // The remaining grammars are not universals.
 
   const GrammarInfo * info1 = NULL;
   const GrammarInfo * info2 = NULL;
 
   for (GRAMMARS::const_iterator i = grammars.begin(); i!=grammars.end(); ++i) {
     unsigned long temp = (*i)->GetSequence();
     if (temp == grammar1) info1 = *i;
     if (temp == grammar2) info2 = *i;
   }
 
   if (info1 && info2) {
     GrammarScope s1 = info1->GetScope();
     GrammarScope s2 = info2->GetScope();
     if( info1 == info2 ) return 0;
     if( s1 == GRS_NONE || s2 == GRS_NONE ) return 0; // unable to determine
     if( s1 < s2 ) return 1;
     if( s1 > s2 ) return -1;
     if( s1 == s2 ) {
       // if both have the same precedence, use document order
       // to determine
       if( info1->GetSequence() < info2->GetSequence() )
         return 1;
       else if(info1->GetSequence() > info2->GetSequence())
         return -1;
       else return 0;
     }
   }
 
   return 0; // unable to determine
 }
 
 int GrammarManager::Record(const VXIMapHolder & properties,
                            bool flushBeforeRecord,
                            VXIrecRecordResult * & resultStruct)
 {
   const VXIMap *finalProp = NULL;
   VXIMapHolder addlProp(NULL);
   if (flushBeforeRecord) {
     addlProp = properties;
     AddParamValue(addlProp, REC_DTMF_FLUSH_QUEUE, true);
     finalProp = addlProp.GetValue();
   } else {
     finalProp = properties.GetValue();
   }
 
   VXIrecResult err = vxirec->Record(vxirec, finalProp, &resultStruct);
 
   if (err != VXIrec_RESULT_SUCCESS) {
     // try to throw a specific event for the error before bailing out
     ThrowSpecificEventError(err, RECORD);
     
     // throw an internal error if specific event cannot be thrown
     log.StartDiagnostic(0) << L"GrammarManager::Record - "
       L"VXIrecInterface::Record returned " << int (err);
     log.EndDiagnostic();
     log.LogError(421, SimpleLogger::MESSAGE,
                  L"function did not return the expected VXIrecSUCCESS result");
     if (resultStruct) resultStruct->Destroy(&resultStruct);
     return GrammarManager::InternalError;
   }
 
   if (resultStruct == NULL) {
     log.LogError(421, SimpleLogger::MESSAGE,
                  L"function returned VXIrecSUCCESS but did not allocate "
                  L"an answer structure");
     return GrammarManager::InternalError;
   }
 
   if (resultStruct->waveform == NULL && resultStruct->xmlresult == NULL) {
     log.LogError(421, SimpleLogger::MESSAGE,
                  L"function did not produce a recording or XML result");
     return GrammarManager::InternalError;
   }
 
   if (resultStruct->waveform != NULL && resultStruct->duration == 0) {
     log.LogError(421, SimpleLogger::MESSAGE,
                  L"function returned invalid recording duration");
     return GrammarManager::InternalError;
   }
 
   return GrammarManager::Success;
 }
 
 
 VXIMap * GrammarManager::GetRecProperties(const PropertyList & props,
                                           int timeout) const
 {
   VXIMapHolder m;
   if (m.GetValue() == NULL) throw VXIException::OutOfMemory();
 
   // (1) Retrieve flattened property list.
   props.GetProperties(m);
 
   // (2) Convert & manipulate the properties.
 #pragma message ("GrammarManager::GetRecProperties - handle REC_RESULT_SAVE_WAVEFORM ???")
 
   const VXIchar * j;
   VXIint time;
   VXIflt32 fraction;
 
   // (2.1) Language
   j = props.GetProperty(PropertyList::Language);
   if (j != NULL)
     AddParamValue(m, REC_LANGUAGE, j);
 
   // (2.2) Completion timeout
   j = props.GetProperty(PROP_COMPLETETIME);
   if (j != NULL && props.ConvertTimeToMilliseconds(log, j, time))
     AddParamValue(m, REC_TIMEOUT_COMPLETE, time);
 
   // (2.3) Incompletion timeout
   j = props.GetProperty(PROP_INCOMPLETETIME);
   if (j != NULL && props.ConvertTimeToMilliseconds(log, j, time))
     AddParamValue(m, REC_TIMEOUT_INCOMPLETE, time);
 
   // (2.4) Inter-Digit timeout
   j = props.GetProperty(PROP_INTERDIGITTIME);
   if (j != NULL && props.ConvertTimeToMilliseconds(log, j, time))
     AddParamValue(m, REC_DTMF_TIMEOUT_INTERDIGIT, time);
 
   // (2.5) Inter-Digit timeout
   j = props.GetProperty(PROP_TERMTIME);
   if (j != NULL && props.ConvertTimeToMilliseconds(log, j, time))
     AddParamValue(m, REC_DTMF_TIMEOUT_TERMINATOR, time);
 
   // (2.6) Confidence level
   j = props.GetProperty(PROP_CONFIDENCE);
   if (j != NULL && props.ConvertValueToFraction(log, j, fraction))
     AddParamValue(m, REC_CONFIDENCE_LEVEL, fraction);
 
   // (2.7) Barge-in sensitivity level
   j = props.GetProperty(PROP_SENSITIVITY);
   if (j != NULL && props.ConvertValueToFraction(log, j, fraction))
     AddParamValue(m, REC_SENSITIVITY, fraction);
 
   // (2.8) Performance tradeoff - speed vs. accuracy
   j = props.GetProperty(PROP_SPEEDVSACC);
   if (j != NULL && props.ConvertValueToFraction(log, j, fraction))
     AddParamValue(m, REC_SPEED_VS_ACCURACY, fraction);
 
   // (2.9) DTMF terminator character
   j = props.GetProperty(PROP_TERMCHAR);
   if (j != NULL) {
     if (wcslen(j) < 2)
       AddParamValue(m, REC_DTMF_TERMINATOR_CHAR, j);
     else {
       log.StartDiagnostic(0) << L"GrammarManager::GetRecProperties - "
         L"Unable to set " << REC_DTMF_TERMINATOR_CHAR << L" from value \"" <<
         j << L"\".  Defaulting to '#'.";
       log.EndDiagnostic();
       // Should we use the default, or rather not set anything ?
       AddParamValue(m, REC_DTMF_TERMINATOR_CHAR, L"#");
     }
   }
 
   // (2.10) Input modes
   int mode = REC_INPUT_MODE_DTMF_SPEECH;
   j = props.GetProperty(PROP_INPUTMODES);
   if (j != NULL) {
     vxistring value(j);
     if (value == L"voice dtmf" || value == L"dtmf voice")
       mode = REC_INPUT_MODE_DTMF_SPEECH;
     else if (value == L"voice")
       mode = REC_INPUT_MODE_SPEECH;
     else if (value == L"dtmf")
       mode = REC_INPUT_MODE_DTMF;
     else {
       log.StartDiagnostic(0) << L"GrammarManager::GetRecProperties - "
         L"Unable to set " << REC_INPUT_MODES << L" from value \"" << value <<
         L"\".";
       log.EndDiagnostic();
     }
   }
   AddParamValue(m, REC_INPUT_MODES, mode);
 
   // (2.11) Timeout settings
   if (timeout == -1) {
     j = props.GetProperty(PROP_TIMEOUT);
     if (j != NULL)
       PropertyList::ConvertTimeToMilliseconds(log, j, timeout);
   }
 
   if (timeout != -1) {
     AddParamValue(m, REC_DTMF_TIMEOUT, timeout);
     AddParamValue(m, REC_TIMEOUT, timeout);
   }
 
   // (2.12) Bargein type
   int bargintype = REC_BARGEIN_SPEECH;
   j = props.GetProperty(PROP_BARGEINTYPE);
   if (j != NULL) {
     vxistring value(j);
     if (value == L"hotword")
       bargintype = REC_BARGEIN_HOTWORD;
     else if (value == L"speech")
       bargintype = REC_BARGEIN_SPEECH;
     else {
       log.StartDiagnostic(0) << L"GrammarManager::GetRecProperties - "
         L"Unable to set " << REC_BARGEIN_TYPE << L" from value \"" << value <<
         L"\".";
       log.EndDiagnostic();
     }
   }
   AddParamValue(m, REC_BARGEIN_TYPE, bargintype);
 
   // (2.13) maxnbest property
   j = props.GetProperty(PROP_MAXNBEST);
   if (j != NULL) {
     VXIint nbest = 1;
     std::basic_stringstream<VXIchar> nbestStream(j);
     nbestStream >> nbest;
     AddParamValue(m, REC_RESULT_NBEST_SIZE, nbest);
   }
   // (3) Done
 
   return m.Release();
 }
 
 
 VXIMap * GrammarManager::GetRecordProperties(const PropertyList & props,
                                              int timeout) const
 {
   VXIMapHolder m;
   if (m.GetValue() == NULL) throw VXIException::OutOfMemory();
 
   // (1) Retrieve flattened property list.
   props.GetProperties(m);
 
   // (2) Convert & manipulate the properties.
   const VXIchar * j;
   VXIint time;
 
   // (2.1) Completion timeout
   j = props.GetProperty(GrammarManager::MaxTime);
   if (j != NULL && props.ConvertTimeToMilliseconds(log, j, time))
     AddParamValue(m, REC_MAX_RECORDING_TIME, time);
 
   // (2.2) Final silence
   j = props.GetProperty(GrammarManager::FinalSilence);
   if (j != NULL && props.ConvertTimeToMilliseconds(log, j, time))
     AddParamValue(m, REC_TIMEOUT_COMPLETE, time);
 
   // (2.3) Type
   j = props.GetProperty(GrammarManager::RecordingType);
   if (j != NULL)
     AddParamValue(m, REC_RECORD_MIME_TYPE, j);
 
   // (2.4) DTMF terminates record?
   j = props.GetProperty(GrammarManager::DTMFTerm);
   if (j != NULL) {
     int dtmfterm;
     if (vxistring(j) == L"false")
       dtmfterm = 0;
     else
       dtmfterm = 1;
 
     AddParamValue(m, REC_TERMINATED_ON_DTMF, dtmfterm);
   }
 
   // (2.5) Timeout settings
   if (timeout == -1) {
     j = props.GetProperty(PROP_TIMEOUT);
     if (j != NULL)
       PropertyList::ConvertTimeToMilliseconds(log, j, timeout);
   }
 
   if (timeout != -1) {
     AddParamValue(m, REC_DTMF_TIMEOUT, timeout);
     AddParamValue(m, REC_TIMEOUT, timeout);
   }
 
   // (3) Done
 
   return m.Release();
 }
 
 
 void GrammarManager::SetGrammarLoadProperties(const VXMLElement & element,
                                               VXIMapHolder & properties) const
 {
   vxistring attr;
 
   // (1) Set weight
 
   VXIflt32 val;
   if (element.GetAttribute(ATTRIBUTE_WEIGHT, attr) == true &&
       PropertyList::ConvertValueToFraction(log, attr, val))
   {
     AddParamValue(properties, REC_GRAMMAR_WEIGHT, val);
   }
   else
     AddParamValue(properties, REC_GRAMMAR_WEIGHT, 1.0f);
 
   // (2) Set language; parsing should ensure that this value is always defined
   attr = L"";
   if (!element.GetAttribute(ATTRIBUTE_XMLLANG, attr)) {
     log.LogError(999, SimpleLogger::MESSAGE,
                  L"GrammarManager::SetGrammarLoadProperties did not "
                  L"find a language");
   }
   AddParamValue(properties, REC_LANGUAGE, attr);
 
   // (3) Set prefetch status
   attr = L"";
   if (element.GetAttribute(ATTRIBUTE_FETCHHINT, attr) != true) {
     const VXIValue * v = VXIMapGetProperty(properties.GetValue(),
                                            L"grammarfetchhint");
     if (VXIValueGetType(v) == VALUE_STRING)
       attr = VXIStringCStr(reinterpret_cast<const VXIString *>(v));
   }
 
   if (attr == L"prefetch")
     AddParamValue(properties, REC_PREFETCH_REQUEST, 1);
   else
     AddParamValue(properties, REC_PREFETCH_REQUEST, 0);
 }