problem with opening code instance in EVRC

[prasadnnr@xxxxxxxxx (sameer prajapati)]

Hi all,
Can anyone tell me whats goin on in this OPEN function?
How is it taking value of gsm_data->encoder  from gsm_create()?


Do i need to do same thing while writing open function for EVRC codec?




 * Open codec.
 */
static pj_status_t gsm_codec_open( pjmedia_codec *codec,
				   pjmedia_codec_param *attr )
{
    struct gsm_data *gsm_data = (struct gsm_data*) codec->codec_data;

    pj_assert(gsm_data != NULL);
    pj_assert(gsm_data->encoder == NULL && gsm_data->decoder == NULL);

    gsm_data->encoder = gsm_create();
    if (!gsm_data->encoder)
	return PJMEDIA_CODEC_EFAILED;

    gsm_data->decoder = gsm_create();
    if (!gsm_data->decoder)
	return PJMEDIA_CODEC_EFAILED;

    gsm_data->vad_enabled = (attr->setting.vad != 0);
    gsm_data->plc_enabled = (attr->setting.plc != 0);

    return PJ_SUCCESS;
}

/*




Do we really need to take gsm_data->encoder value by gsm_create()?
If we don;t hv anything lie gsm_create() in our EVRC file,what can we do?

Please help me out.


Thanks.
Sameer Prajapati

Contact no.9953595878