Converting Wav File to raw format and storing in Descriptor

[sanket_lopez]

Hi All,

I am trying to Convert a ADPCM Format .Wav file to raw format. I have used CMdaAudioConvertUtility to do this.

But I always get a KErrUnderflow error as errorcode in MoscoStateChangeEvent() callback function.

Bellow is my code, Where am I going wrong.

Code:

_LIT(KSrcFileStream, "\\system\\apps\\simple\\test.wav");
TBufC<64> tempstr(KSrcFileStream);

iConverter = CMdaAudioConvertUtility::NewL(*this);
iSoundBuf = HBufC8::New(50000);
iClip.iDes = &(iSoundBuf->Des());
iFormat = TMdaRawAudioClipFormat();
iSl16Codec = TMdaSL16RawAudioCodec();

iSettings.iSampleRate = TMdaAudioDataSettings::ESampleRate8000Hz;
iSettings.iChannels = TMdaAudioDataSettings::EChannelsMono;

iConverter->OpenL(tempstr,
&iClip,
&iFormat,
&iSl16Codec,
&iSettings);



Any help will be greatly appreciated.

Thanks in Advance,

Sanket Lopez.

[sanket_lopez]

Hi,

I have been trying to solve this problem, when I went through threads in forum, I found that the OpenL() with eight arguments have been documented incorrectly in Documentation and the order last 4 parameters is wrong.

After using and adapting to the correct version of the eight argument OpenL function I have started getting this new error in MoscoStateChangeEvent(). Its Error -15, this is KErrServerTerminated.

I dont know why is this happening. I have tried shuffeling all codecs and the Settings But still the error Lives.

I am really looking some to reach that hand of help and get me out of this one.

I have also change the way I pass the HBufC descriptor to the OpenL function.

Bellow is my code snippet.

Code:
==============================================
TMdaAudioDataSettings iSrcSettings;
TMdaAudioDataSettings iDesSettings;

iConverter = CMdaAudioConvertUtility::NewL(*this,NULL,EMdaPriorityMax);

iSoundBuf = HBufC8::NewL(50000);

iMyPtr.Set(const_cast<TUint8*>(iSoundBuf->Ptr()), 50000, 50000);

iDesClipLocation = TMdaDesClipLocation(iMyPtr);
iSrcClipLocation = TMdaFileClipLocation(tempstr);

iSrcFormat = TMdaWavClipFormat();
iSrcCodec = TMdaImaAdpcmWavCodec();
iSrcSettings.iSampleRate = TMdaAudioDataSettings::ESampleRate16000Hz;
iSrcSettings.iChannels = TMdaAudioDataSettings::EChannelsMono;


iDesFormat = TMdaRawAudioClipFormat();
iDesCodec = TMdaUB16RawAudioCodec();
iDesSettings.iSampleRate = TMdaAudioDataSettings::ESampleRate8000Hz;
iDesSettings.iChannels = TMdaAudioDataSettings::EChannelsMono;

iConverter->OpenL(&iSrcClipLocation,
&iDesClipLocation,
&iSrcFormat,
&iDesFormat,
&iSrcCodec,
&iSrcSettings,
&iDesCodec,
&iDesSettings);
==============================================
Can some share their experience on this with me.

Thanks for the Attention.

Sanket Lopez

[sanket_lopez]

A Particular thread say that someone has solved this problem, When converting Raw to Wav.

Any clues will surely help as well.

[sanket_lopez]

I am working on this for more that one week now. Nokia Forum Experts Plz Help

[sanket_lopez]

Hi

I have changed the OpenL Function and instead of passing 8 arguments i pass only 4 arguments.

iConverter->OpenL(&iSrcClipLocation,
                     &iDesClipLocation,
                     &iSrcFormat,
                     &iDesFormat);

Now in the MoscoStateChangeEvent i get an KErrNotReady. I cant figure out whats happeinng, why is this error thrown.

if (aPreviousState == CMdaAudioConvertUtility::ENotReady && 
          aCurrentState == CMdaAudioConvertUtility::EOpen){ 
         iState = EConvert; 
         TRAPD(err, iConverter->RecordL()); 
         if (KErrNone != err){ // err = KErrNotReady here
            iConverter->Stop(); 
            iConverter->Close(); 
            return; 
         }

Plz Help.

[sanket_lopez]

Hi,

I have Change the OpenL() function to following

iSrcFormat  = TMdaWavClipFormat(); 
iConverter->OpenL(KSrcFileStream,
                     &iDesClipLocation1,
                     &iSrcFormat);

the Converters State is changed tp EOpen but then if I try to call a PlayL() or RecordL on it i get a KErrNotReady Error.

if (iConverter == aObject){ 
      if (aPreviousState == CMdaAudioConvertUtility::ENotReady && 
          aCurrentState == CMdaAudioConvertUtility::EOpen){ 
         iState = EConvert; 

         TRAPD(err, iConverter->RecordL()); 
         if (KErrNone != err){ 
            TBuf<64> temp;
            temp.Num(err);
            iEikonEnv->InfoWinL(_L("Error"), temp);
            iConverter->Stop(); 
            iConverter->Close(); 
         } 
      } 
   }

Some One plz Help

[sanket_lopez]

Hasent anybody tried it yet.

[sanket_lopez]

Are u looking into this matter. Plz help. Atleast let me know is this possible.