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/*
The mediastreamer library aims at providing modular media processing and I/O
for linphone, but also for any telephony application.
Copyright (C) 2001 Simon MORLAT simon.morlat@linphone.org
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "msMUlawenc.h"
#include "g711common.h"
extern MSCodecInfo MULAWinfo;
static MSMULAWEncoderClass *ms_MULAWencoder_class=NULL;
MSFilter * ms_MULAWencoder_new(void)
{
MSMULAWEncoder *r;
r=g_new(MSMULAWEncoder,1);
ms_MULAWencoder_init(r);
if (ms_MULAWencoder_class==NULL)
{
ms_MULAWencoder_class=g_new(MSMULAWEncoderClass,1);
ms_MULAWencoder_class_init(ms_MULAWencoder_class);
}
MS_FILTER(r)->klass=MS_FILTER_CLASS(ms_MULAWencoder_class);
return(MS_FILTER(r));
}
/* FOR INTERNAL USE*/
void ms_MULAWencoder_init(MSMULAWEncoder *r)
{
ms_filter_init(MS_FILTER(r));
MS_FILTER(r)->infifos=r->f_inputs;
MS_FILTER(r)->outfifos=r->f_outputs;
MS_FILTER(r)->r_mingran=MULAW_ENCODER_RMAXGRAN; /* the filter can be called as soon as there is
something to process */
memset(r->f_inputs,0,sizeof(MSFifo*)*MSMULAWENCODER_MAX_INPUTS);
memset(r->f_outputs,0,sizeof(MSFifo*)*MSMULAWENCODER_MAX_INPUTS);
}
void ms_MULAWencoder_class_init(MSMULAWEncoderClass *klass)
{
ms_filter_class_init(MS_FILTER_CLASS(klass));
ms_filter_class_set_name(MS_FILTER_CLASS(klass),"MULAWEncoder");
MS_FILTER_CLASS(klass)->info=(MSFilterInfo*)&MULAWinfo;
MS_FILTER_CLASS(klass)->max_finputs=MSMULAWENCODER_MAX_INPUTS;
MS_FILTER_CLASS(klass)->max_foutputs=MSMULAWENCODER_MAX_INPUTS;
MS_FILTER_CLASS(klass)->r_maxgran=MULAW_ENCODER_RMAXGRAN;
MS_FILTER_CLASS(klass)->w_maxgran=MULAW_ENCODER_WMAXGRAN;
MS_FILTER_CLASS(klass)->destroy=(MSFilterDestroyFunc)ms_MULAWencoder_destroy;
MS_FILTER_CLASS(klass)->process=(MSFilterProcessFunc)ms_MULAWencoder_process;
}
void ms_MULAWencoder_process(MSMULAWEncoder *r)
{
MSFifo *fi,*fo;
int inlen,outlen;
gchar *s,*d;
int i;
/* process output fifos, but there is only one for this class of filter*/
fi=r->f_inputs[0];
fo=r->f_outputs[0];
inlen=ms_fifo_get_read_ptr(fi,MULAW_ENCODER_RMAXGRAN,(void**)&s);
outlen=ms_fifo_get_write_ptr(fo,MULAW_ENCODER_WMAXGRAN,(void**)&d);
if (d!=NULL)
{
for(i=0;i<MULAW_ENCODER_WMAXGRAN;i++)
{
d[i]=s16_to_ulaw( *((gint16*)s) );
s+=2;
}
}
else g_warning("MSMULAWDecoder: Discarding samples !!");
}
void ms_MULAWencoder_destroy( MSMULAWEncoder *obj)
{
g_free(obj);
}
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