我正在尝试使用以下函数将文本转换为波形文件。如果从主 UI 线程调用它工作正常。但是从另一个线程调用时失败。如何从多线程函数中调用它?
void Pan_Channel::TextToPlaybackFile( CString Text, CString FileName )
{
// Result variable
HRESULT Result = S_OK;
// Voice Object
CComPtr<ISpVoice> cpVoice;
// Create a SAPI Voice
Result = cpVoice.CoCreateInstance( CLSID_SpVoice );
// Audio format
CSpStreamFormat cAudioFmt;
// Set the audio format
if( SUCCEEDED( Result ) )
{
Result = cAudioFmt.AssignFormat( SPSF_8kHz16BitMono );
}
// File Stream
CComPtr<ISpStream> cpStream;
// Call SPBindToFile, a SAPI helper method, to bind the audio stream to the file
if( SUCCEEDED( Result ) )
{
Result = SPBindToFile( FileName, SPFM_CREATE_ALWAYS, &cpStream,
&cAudioFmt.FormatId(), cAudioFmt.WaveFormatExPtr() );
}
// set the output to cpStream so that the output audio data will be stored in cpStream
if( SUCCEEDED( Result ) )
{
Result = cpVoice->SetOutput( cpStream, TRUE );
}
// Speak the text syncronously
if( SUCCEEDED( Result ) )
{
Result = cpVoice->Speak( Text.AllocSysString(), SPF_DEFAULT, NULL );
}
// close the stream
if( SUCCEEDED( Result ) )
{
Result = cpStream->Close();
}
// Release stream
cpStream.Release();
// Release voice object
cpVoice.Release();
}