private void ExtractDictationAlternates(ISpRecoResult recoResult, int maxAlternates)
{
if (recoResult != null && base.Grammar is DictationGrammar)
{
_alternates = new Collection <RecognizedPhrase>();
IntPtr[] array = new IntPtr[maxAlternates];
try
{
recoResult.GetAlternates(0, -1, maxAlternates, array, out maxAlternates);
}
catch (COMException)
{
maxAlternates = 0;
}
for (uint num = 0u; num < maxAlternates; num++)
{
ISpPhraseAlt spPhraseAlt = (ISpPhraseAlt)Marshal.GetObjectForIUnknown(array[num]);
try
{
IntPtr ppCoMemPhrase;
spPhraseAlt.GetSerializedPhrase(out ppCoMemPhrase);
try
{
RecognizedPhrase recognizedPhrase = new RecognizedPhrase();
SPSERIALIZEDPHRASE phraseHeader = RecognizedPhrase.GetPhraseHeader(ppCoMemPhrase, uint.MaxValue, _isSapi53Header);
bool hasIPAPronunciation = (_header.fAlphabet & 1) != 0;
recognizedPhrase.InitializeFromSerializedBuffer(this, phraseHeader, ppCoMemPhrase, (int)phraseHeader.ulSerializedSize, _isSapi53Header, hasIPAPronunciation);
_alternates.Add(recognizedPhrase);
}
finally
{
Marshal.FreeCoTaskMem(ppCoMemPhrase);
}
}
finally
{
Marshal.Release(array[num]);
}
}
}
}
private void ExtractDictationAlternates(ISpRecoResult recoResult, int maxAlternates)
{
// Get the alternates for dictation
// alternates for dictation are not part of the recognition results and must be pulled out
// from the recognition result bits.
if (recoResult != null) // recoResult is null if we are in the case of our unit test.
{
if (Grammar is DictationGrammar)
{
_alternates = new Collection <RecognizedPhrase>();
IntPtr[] sapiAlternates = new IntPtr[maxAlternates];
try
{
recoResult.GetAlternates(0, -1, maxAlternates, sapiAlternates, out maxAlternates);
}
catch (COMException)
{
// In some cases such as when the dictation grammar has been unloaded, the engine may not be able
// to provide the alternates. We set the alternate list to empty.
maxAlternates = 0;
}
//InnerList.Capacity = (int)numSapiAlternates;
for (uint i = 0; i < maxAlternates; i++)
{
ISpPhraseAlt phraseAlt = (ISpPhraseAlt)Marshal.GetObjectForIUnknown(sapiAlternates[i]);
try
{
IntPtr coMemSerializedPhrase;
phraseAlt.GetSerializedPhrase(out coMemSerializedPhrase);
try
{
// Build a recognition phrase result
RecognizedPhrase phrase = new();
// we cannot use a constructor parameter because RecognitionResult also derives from RecognizedPhrase
SPSERIALIZEDPHRASE serializedPhrase = RecognizedPhrase.GetPhraseHeader(coMemSerializedPhrase, uint.MaxValue, _isSapi53Header);
//
// If we are getting the alternates from SAPI, the alphabet should have already been converted
// to the alphabet we (applications) want.
//
bool hasIPAPronunciation = (_header.fAlphabet & (uint)SPRESULTALPHABET.SPRA_APP_UPS) != 0;
phrase.InitializeFromSerializedBuffer(this, serializedPhrase, coMemSerializedPhrase, (int)serializedPhrase.ulSerializedSize, _isSapi53Header, hasIPAPronunciation);
_alternates.Add(phrase);
}
finally
{
Marshal.FreeCoTaskMem(coMemSerializedPhrase);
}
}
finally
{
Marshal.Release(sapiAlternates[i]);
}
}
}
}
}
