Problem Converting Char Array to String When Using Microsoft Speech SDK

[mnutsch]

I am learning to use the Microsoft Speach SDK 5.1 (SAPI). I want to use the dictate feature of SAPI to capture text, then save that text to a string. I can save the text to a char array using sprintf. I can also even output that char array to a text file. However I cannot find a way to convert the char array to a string which actually results in the text being copied. I have tried multiple methods. Many of them compile, but none of them work.. My compiler is Microsoft Visual C++ .Net 2003.

#include "stdafx.h"
#include <sapi.h>
#include "sphelper.h"
#include <fstream>
#include <iostream>
#include <sstream>
#include <string.h>

using namespace std;

string strtextfromspeech = "";
char buffer [50];


int WriteStringToFile()
{
	string newfilename; 
	newfilename = "temp.txt";
	
	ofstream outputfile (newfilename.c_str());
	if (outputfile.is_open())
	{
		outputfile << buffer << "\n";
		
		outputfile.close();
	}
	  else cout << "Unable to open file"; 
	//
	return(0);
}

string ReadStringFromFile()
{
	
	string mline;
	
	ifstream mdatafile ("temp.txt");

	if (mdatafile.is_open())
	{
		
		getline(mdatafile, mline, '\n');
			
		mdatafile.close();
	}

	  else cout << "Unable to open file"; 
	 cout << "mline is " << mline << endl; 
	  return(mline);
}



inline HRESULT BlockForResult(ISpRecoContext * pRecoCtxt, ISpRecoResult ** ppResult)
{

    HRESULT hr = S_OK;
	CSpEvent event;

    while (SUCCEEDED(hr) &&
           SUCCEEDED(hr = event.GetFrom(pRecoCtxt)) &&
           hr == S_FALSE)
    {
        hr = pRecoCtxt->WaitForNotifyEvent(INFINITE);
    }
	
    *ppResult = event.RecoResult();
    if (*ppResult)
    {
        (*ppResult)->AddRef();
	
    }

    return hr;
}

const WCHAR * StopWord()
{
    const WCHAR * pchStop;
    
    LANGID LangId = ::SpGetUserDefaultUILanguage();

    switch (LangId)
    {
        case MAKELANGID(LANG_JAPANESE, SUBLANG_DEFAULT):
            pchStop = L"\x7d42\x4e86\\\x30b7\x30e5\x30fc\x30ea\x30e7\x30fc/\x3057\x3085\x3046\x308a\x3087\x3046";;
            break;

        default:
            pchStop = L"Affirmative";
            break;
    }

    return pchStop;
}

//int GetTextFromSpeech(int argc, char* argv[])
int GetTextFromSpeech()
{
	HRESULT hr = E_FAIL;
    bool fUseTTS = false;            // turn TTS play back on or off


    if (SUCCEEDED(hr = ::CoInitialize(NULL)))
    {
        {
            CComPtr<ISpRecoContext> cpRecoCtxt;
            CComPtr<ISpRecoGrammar> cpGrammar;
            CComPtr<ISpVoice> cpVoice;
            hr = cpRecoCtxt.CoCreateInstance(CLSID_SpSharedRecoContext);
            if(SUCCEEDED(hr))
            {
                hr = cpRecoCtxt->GetVoice(&cpVoice);
            }
           
            if (cpRecoCtxt && cpVoice &&
                SUCCEEDED(hr = cpRecoCtxt->SetNotifyWin32Event()) &&
                SUCCEEDED(hr = cpRecoCtxt->SetInterest(SPFEI(SPEI_RECOGNITION), SPFEI(SPEI_RECOGNITION))) &&
                SUCCEEDED(hr = cpRecoCtxt->SetAudioOptions(SPAO_RETAIN_AUDIO, NULL, NULL)) &&
                SUCCEEDED(hr = cpRecoCtxt->CreateGrammar(0, &cpGrammar)) &&
                SUCCEEDED(hr = cpGrammar->LoadDictation(NULL, SPLO_STATIC)) &&
                SUCCEEDED(hr = cpGrammar->SetDictationState(SPRS_ACTIVE)))
            {
                USES_CONVERSION;
                            
                const WCHAR * const pchStop = StopWord();
                CComPtr<ISpRecoResult> cpResult;

                printf( "I will repeat everything you say.\nSay \"%s\" to exit.\n", W2A(pchStop) );

                while (SUCCEEDED(hr = BlockForResult(cpRecoCtxt, &cpResult)))
                {
                    cpGrammar->SetDictationState( SPRS_INACTIVE );

                    CSpDynamicString dstrText;
		

                    if (SUCCEEDED(cpResult->GetText(SP_GETWHOLEPHRASE, SP_GETWHOLEPHRASE, 
                                                    TRUE, &dstrText, NULL)))
			
                    {
                       printf("I heard:  %s\n If that is correct say *affirmative*\n", W2A(dstrText));
						
						
						

                        if (fUseTTS)
                        {
                            cpVoice->Speak( L"I heard", SPF_ASYNC, NULL);
                            cpVoice->Speak( dstrText, SPF_ASYNC, NULL );
                        }

                     

                       cpResult.Release();
                    }
                    if (_wcsicmp(dstrText, pchStop) == 0)
                    {
                        break;
                    }
					else
					{	
						int n;
						n=sprintf (buffer, "%s", W2A(dstrText));
						buffer[50] = 0;
						printf ("The buffer recorded is: [%s]\n",buffer,n);
	
						strtextfromspeech = buffer;
					  
						//WriteStringToFile();
			
					}
	              
                    cpGrammar->SetDictationState( SPRS_ACTIVE );
                } 
            }
        }
        ::CoUninitialize();
    }
    return hr;
}
            
int main(int argc2, char* argv2[])
{
	GetTextFromSpeech();
	
	//strtextfromspeech = ReadStringFromFile();
	printf ("The string recorded is: %s\n",strtextfromspeech);
	
	
	printf("Type something to quit.");
	
	char strpause[50];
	cin.getline (strpause, 50);

	
	return 0;
}

Here is a typical output:

I will repeat everything you say.
Say "Affirmative" to exit.
I heard: In session
 If that is correct say "affirmative"
I heard: Affirmative
 If that is correct say "affirmative"
the string record is: (null)
Type something to quit.

I want "strtextfromspeech" to equal "buffer". Instead it always equals "(null)". What am I doing wrong? Any help is appreciated.

MN

[guestgulkan]

printf ("The string recorded is: %s\n",strtextfromspeech);//Error

strtextfromspeech is a c++ string class - expecting the printf function to do something sensible with it is expecting too much.

try (get the char* bufffer from the string using the c_str() member function, you know about this function - you have used it earlier in the code)

printf ("The string recorded is: %s\n",strtextfromspeech.c_str());

[mnutsch]

That fixed it! Thanks for your help guestgulkan.