Decoding Opus audio data

I am trying to decode an Opus file back to raw 48 kHz. However I am unable to find any sample code to do that.

My current code is this:

void COpusCodec::Decode(unsigned char* encoded, short* decoded, unsigned int len)
{
     int max_size=960*6;//not sure about this one

     int error;
     dec = opus_decoder_create(48000, 1, &error);//decode to 48kHz mono

     int frame_size=opus_decode(dec, encoded, len, decoded, max_size, 0);
}

The argument "encoded" might be larger amounts of data, so I think I have to split it into frames. I am not sure how I could do that.

And with being a beginner with Opus, I am really afraid to mess something up.

Could anybody perhaps help?