cwavefile.cpp

windows embedded ce (wince6.0)上录音事例程序源码。可编成.exe在系统上运行。

                                NULL,
                                dwCreationDistribution,
                                dwFlagsAndAttributes,
                                NULL );
        if( INVALID_HANDLE_VALUE == hRiffSize )
        {
            RETAILMSG(1, (TEXT("ERROR:CREATE:  hRiffSize == INVALID_HANDLE_VALUE")));
            return dwLastError = GetLastError();
        }

        hWaveSize = CreateFile( lpFileName,
                                dwDesiredAccess,
                                FILE_SHARE_READ | FILE_SHARE_WRITE,
                                NULL,
                                dwCreationDistribution,
                                dwFlagsAndAttributes,
                                NULL );
        if( INVALID_HANDLE_VALUE == hWaveSize )
        {
            RETAILMSG(1, (TEXT("ERROR:CREATE:  hRiffSize == INVALID_HANDLE_VALUE")));
            return dwLastError = GetLastError();
         }

    } // if( GENERIC_WRITE )

    /* --------------------------------------------------------------------
        If file exists and has data verify that data is for a WAVE-RIFF
        file.  If so copy <wave-formate> and <PCM-format-specific> data to
        lpPcmWaveFormat.
    -------------------------------------------------------------------- */
    if( GetFileSize( hWaveData, NULL ) )
    {
        return GetFormat( lplpWaveFormat, lplpInfo );
    }

    /* --------------------------------------------------------------------
    	Initalize the WAVE-RIFF file
    -------------------------------------------------------------------- */
    return InitFile( (PCMWAVEFORMAT *)*lplpWaveFormat, lplpInfo );

} // end DWORD CWaveFile::Create( ... )


/*++

CWave::ReadData:

	This function reads the wave data from a wave file and puts it in the
	passed buffer.
	
Arguments:

    lpWaveData,	            // address of buffer that receives WAVE data
    nNumberOfBytesToRead,	// number of bytes to read
    lpNumberOfBytesRead,	// address of number of bytes read
    lpOverlapped 	        // address of structure for data

Return Value:

	Same as ReadFile

Notes:

--*/
BOOL CWaveFile::ReadData( LPVOID          lpWaveData,	
                          DWORD           nNumberOfBytesToRead,
                          LPDWORD         lpNumberOfBytesRead )
{
    BOOL    bRtn;

    if(NULL == lpWaveData) {
		dwLastError = ERROR_INVALID_PARAMETER;
		return bRtn = FALSE;
    }

    bRtn = ReadFile( hWaveData,
                     lpWaveData,
                     nNumberOfBytesToRead,
                     lpNumberOfBytesRead,
                     NULL );

    dwLastError = GetLastError();

    return bRtn;

} // end BOOL CWaveFile::ReadData( ... )


/*++

CWaveFile::WriteData:

	This function writes a buffers worth of WAVE data to the WAVE file.

Arguments:

    lpWaveData,	              // address of buffer that receives WAVE data
    nNumberOfBytesToWrite,	// number of bytes to write
    lpNumberOfBytesWritten,	// address of number of bytes written
    lpOverlapped 	              // address of structure for data
	

Return Value:

    SameAsWriteFile	

Notes:

--*/
BOOL CWaveFile::WriteData( LPCVOID         lpWaveData,	
                           DWORD           nNumberOfBytesToWrite,	
                           LPDWORD         lpNumberOfBytesWritten )
{
    BOOL    bRtn;

    if(NULL == lpWaveData) {
              RETAILMSG(1, (TEXT("ERROR: WRITEDATA:  NULL == lpWaveData")));
		dwLastError = ERROR_INVALID_PARAMETER;
		return bRtn = false;
    }

    if(hWaveData == INVALID_HANDLE_VALUE)
    {
        RETAILMSG(1, (TEXT("ERROR: WRITEDATA:  hWaveData == INVALID_HANDLE_VALUE")));
    }

    bRtn = WriteFile( hWaveData,
                      lpWaveData,
                      nNumberOfBytesToWrite,
                      lpNumberOfBytesWritten,
                      NULL );
    dwLastError = GetLastError();




    if( bRtn != 0 )
    {
        nRiffSize += *lpNumberOfBytesWritten;
        nWaveSize += *lpNumberOfBytesWritten;
        /* ----------------------------------------------------------------
    	    Set the sizes sizes.
        ---------------------------------------------------------------- */
        //SetEndOfFile( hWaveData ),
        //WriteSize( hRiffSize, nRiffSize );
        //WriteSize( hWaveSize, nWaveSize );
        if(hWaveData == INVALID_HANDLE_VALUE)
            RETAILMSG(1, (TEXT("ERROR: WRITEDATA hWaveData == INVALID_HANDLE_VALUE")));
        //if( !SetEndOfFile( hWaveData ));
        //     RETAILMSG(1, (TEXT("ERROR: Unable to set end of file %d"), GetLastError() ));
        // In current Builds SetEndOfFile returns error code 50, yet still works, so for now we'll disable this spew
        SetEndOfFile( hWaveData );
        if(hRiffSize == INVALID_HANDLE_VALUE)
            RETAILMSG(1, (TEXT("ERROR: WRITEDATA hRiffSize == INVALID_HANDLE_VALUE")));
        if(!WriteSize( hRiffSize, nRiffSize ))
             RETAILMSG(1, (TEXT("ERROR: Unable to write RIFF size to file")));
        if(!WriteSize( hWaveSize, nWaveSize ))
             RETAILMSG(1, (TEXT("ERROR: Unable to write WAVE size to file")));
    } // end if( bRtn )
    else
    {
        RETAILMSG(1, (TEXT("ERROR: In WriteData, bRtn was FALSE")));
        RETAILMSG(1, (TEXT("ERROR: WRITEDATA:  GetLastError Was %d"), dwLastError));
    }

    return bRtn;

} // end BOOL CWaveFile::WriteData( ... );

/*++

DWORD CWaveFile::Rewind:

	This function rewinds the hWaveData pointer to
	the start of the wave data.

Arguments:

	NONE

Return Value:

	TRUE    ->  Success
	FALSE   ->  Failure
	
Notes:

--*/
BOOL CWaveFile::Rewind()
{
    DWORD   dwRtn;

    dwRtn = SetFilePointer( hWaveData, dwDataOffSet, NULL, FILE_BEGIN );

    dwLastError = GetLastError();

    return 0xFFFFFFFF != dwRtn;

} // end BOOL CWaveFile::Rewind()

/*++

DWORD CWaveFile::End:

	This function puts the hWaveData file pointer at the end of the file
	
Arguments:

	NONE

Return Value:

	TRUE    ->  Success
	FALSE   ->  Failure
	
Notes:

--*/
BOOL CWaveFile::End()
{
    DWORD   dwRtn;

    dwRtn = SetFilePointer( hWaveData, dwDataOffSet, NULL, FILE_END );

    dwLastError = GetLastError();

    return 0xFFFFFFFF != dwRtn;

} // end BOOL CWaveFile::End()


/*++

CWaveFile::MoveTo:

	This function moves the file pointer to passed sample offset.

Arguments:

	dwSample    The sample to move the file pointer to.

Return Value:

	==  dwSample Move was a success.
	<   dwSample Move is not at end of file
	0   Some other error check CWaveFile::LastError()
	
Notes:

--*/
DWORD CWaveFile::MoveTo( DWORD dwSample )
{
    DWORD    dwOffset;
    DWORD    dwRtn;

    dwOffset = dwDataOffSet + m_PcmWaveFormat.wf.nBlockAlign * dwSample;

    dwRtn = SetFilePointer( hWaveData, dwOffset, NULL, FILE_BEGIN );
    if( 0xFFFFFFFF == dwRtn )
    {
        WaveFileError();
        return 0;
    }

    return (dwRtn - dwDataOffSet) / m_PcmWaveFormat.wf.nBlockAlign;

} // end DWORD CWaveFile::MoveTo( DWORD dwSample )

/*++

CWaveFile::GetFormat:

	This function reads the wave file from the front to determine if it
	is a WAVE-RIFF file and to read the format data.

Arguments:

	PCMWAVEFORMAT*  lpPcmWaveFormat -> Pointer to the structure to fill with
	                                   the wave format data.
       LPWAVEAUXINFO   lpWaveAuxInfo   -> Currently not used, zeroed if not NULL.	

Return Value:

	If the file is not a WAVE-RIFF file then ERROR_FILE_CORRUPT.

	Other errors will return file error codes

	For sucess ERROR_NOERROR is returned.

Notes:

--*/
DWORD CWaveFile::GetFormat( LPVOID* lplpWaveFormat,
                            LPVOID* lplpInfo )
{
    DWORD   dwBuffer;
    DWORD   dwRtn;
    BOOL    bRtn;

    if(NULL == lplpWaveFormat) {
		dwLastError = ERROR_INVALID_PARAMETER;
		return bRtn = FALSE;
    }

    if( NULL != lplpInfo ) *lplpInfo = NULL;

    /* --------------------------------------------------------------------
   	    Verify that the file is a RIFF formated file.
    -------------------------------------------------------------------- */
    bRtn = ReadFile( hWaveData, &dwBuffer, 4, &dwRtn, NULL );
    if( (!bRtn) || (4 != dwRtn) ) return WaveFileError();

    if( RIFF_FOURCC != dwBuffer ) return WaveFileError( ERROR_FILE_CORRUPT );

    /* --------------------------------------------------------------------
        If writing, set the file pointer to the RIFF chunk size DWORD.   	
    -------------------------------------------------------------------- */
    if( INVALID_HANDLE_VALUE != hRiffSize )
    {
        dwRtn = SetFilePointer( hRiffSize, 4, NULL, FILE_BEGIN );
        if( 0xFFFFFFFF == dwRtn ) return WaveFileError();
    }

    /* --------------------------------------------------------------------
        Read RIFF chunk size    	
    -------------------------------------------------------------------- */
    bRtn = ReadFile( hWaveData, &nRiffSize, 4, &dwRtn, NULL );
    if( (!bRtn) || (4 != dwRtn) ) return WaveFileError();

    /* --------------------------------------------------------------------
        Verify that the file is a WAVE type.
    -------------------------------------------------------------------- */
    bRtn = ReadFile( hWaveData, &dwBuffer, 4, &dwRtn, NULL );
    if( (!bRtn) || (4 != dwRtn) ) return WaveFileError();
    if( WAVE_FOURCC != dwBuffer ) return WaveFileError( ERROR_FILE_CORRUPT );

    /* --------------------------------------------------------------------
    	Read the next FOURCC
    -------------------------------------------------------------------- */
    bRtn = ReadFile( hWaveData, &dwBuffer, 4, &dwRtn, NULL );
    if( (!bRtn) || (4 != dwRtn) ) return WaveFileError();

    /* --------------------------------------------------------------------
    	Read all of the non data chunks.
    -------------------------------------------------------------------- */
    while ( data_FOURCC != dwBuffer )
    {
        switch( dwBuffer ) // FOURCC
        {

            case fmt_FOURCC:
                if ( ReadWaveFormat( lplpWaveFormat ) )
                    return dwLastError;
                break;

            case LIST_FOURCC:
                if ( ReadListInfo( lplpInfo ) )
		      delete [] *lplpInfo; // cleanup since we dont use lplpInfo
	             *lplpInfo = NULL;
                    return dwLastError;
                break;

            case fact_FOURCC:
                if ( ReadFactChunk( ) )