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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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <config.h>
#ifdef HAVE_ILBC
#include <stdlib.h>
#include <stdio.h>
#include "msilbcenc.h"
extern MSCodecInfo ilbc_info;
/* The return value of each of these calls is the same as that
returned by fread/fwrite, which should be the number of samples
successfully read/written, not the number of bytes. */
int
ilbc_read_16bit_samples(gint16 int16samples[], float speech[], int n)
{
int i;
/* Convert 16 bit integer samples to floating point values in the
range [-1,+1]. */
for (i = 0; i < n; i++) {
speech[i] = int16samples[i];
}
return (n);
}
int
ilbc_write_16bit_samples(gint16 int16samples[], float speech[], int n)
{
int i;
float real_sample;
/* Convert floating point samples in range [-1,+1] to 16 bit
integers. */
for (i = 0; i < n; i++) {
float dtmp=speech[i];
if (dtmp<MIN_SAMPLE)
dtmp=MIN_SAMPLE;
else if (dtmp>MAX_SAMPLE)
dtmp=MAX_SAMPLE;
int16samples[i] = (short) dtmp;
}
return (n);
}
/*
Write the bits in bits[0] through bits[len-1] to file f, in "packed"
format.
bits is expected to be an array of len integer values, where each
integer is 0 to represent a 0 bit, and any other value represents a 1
bit. This bit string is written to the file f in the form of several
8 bit characters. If len is not a multiple of 8, then the last
character is padded with 0 bits -- the padding is in the least
significant bits of the last byte. The 8 bit characters are "filled"
in order from most significant bit to least significant.
*/
void
ilbc_write_bits(unsigned char *data, unsigned char *bits, int nbytes)
{
memcpy(data, bits, nbytes);
}
/*
Read bits from file f into bits[0] through bits[len-1], in "packed"
format.
*/
int
ilbc_read_bits(unsigned char *data, unsigned char *bits, int nbytes)
{
memcpy(bits, data, nbytes);
return (nbytes);
}
static MSILBCEncoderClass *ms_ilbc_encoder_class=NULL;
MSFilter * ms_ilbc_encoder_new(void)
{
MSILBCEncoder *r;
r=g_new(MSILBCEncoder,1);
ms_ilbc_encoder_init(r);
if (ms_ilbc_encoder_class==NULL)
{
ms_ilbc_encoder_class=g_new(MSILBCEncoderClass,1);
ms_ilbc_encoder_class_init(ms_ilbc_encoder_class);
}
MS_FILTER(r)->klass=MS_FILTER_CLASS(ms_ilbc_encoder_class);
return(MS_FILTER(r));
}
int ms_ilbc_encoder_set_property(MSILBCEncoder *obj, MSFilterProperty prop, char *value)
{
switch(prop){
case MS_FILTER_PROPERTY_FMTP:
if (value == NULL) return 0;
if (strstr(value,"ptime=20")!=NULL) obj->ms_per_frame=20;
else if (strstr(value,"ptime=30")!=NULL) obj->ms_per_frame=30;
else g_warning("Unrecognized fmtp parameter for ilbc encoder!");
break;
}
return 0;
}
int ms_ilbc_encoder_get_property(MSILBCEncoder *obj, MSFilterProperty prop, char *value)
{
switch(prop){
case MS_FILTER_PROPERTY_FMTP:
if (obj->ms_per_frame==20) strncpy(value,"ptime=20",MS_FILTER_PROPERTY_STRING_MAX_SIZE);
if (obj->ms_per_frame==30) strncpy(value,"ptime=30",MS_FILTER_PROPERTY_STRING_MAX_SIZE);
break;
}
return 0;
}
void ms_ilbc_encoder_setup(MSILBCEncoder *r)
{
MSFilterClass *klass = NULL;
switch (r->ms_per_frame) {
case 20:
r->samples_per_frame = BLOCKL_20MS;
r->bytes_per_compressed_frame = NO_OF_BYTES_20MS;
break;
case 30:
r->samples_per_frame = BLOCKL_30MS;
r->bytes_per_compressed_frame = NO_OF_BYTES_30MS;
break;
default:
g_error("Bad bitrate value (%i) for ilbc encoder!", r->ms_per_frame);
break;
}
MS_FILTER(r)->r_mingran= (r->samples_per_frame * 2);
g_message("Using ilbc encoder with %i ms frames mode.",r->ms_per_frame);
initEncode(&r->ilbc_enc, r->ms_per_frame /* ms frames */);
}
/* FOR INTERNAL USE*/
void ms_ilbc_encoder_init(MSILBCEncoder *r)
{
/* default bitrate */
r->bitrate = 15200;
r->ms_per_frame = 20;
r->samples_per_frame = BLOCKL_20MS;
r->bytes_per_compressed_frame = NO_OF_BYTES_20MS;
ms_filter_init(MS_FILTER(r));
MS_FILTER(r)->infifos=r->f_inputs;
MS_FILTER(r)->outqueues=r->q_outputs;
MS_FILTER(r)->r_mingran= (r->samples_per_frame * 2);
memset(r->f_inputs,0,sizeof(MSFifo*)*MSILBCENCODER_MAX_INPUTS);
memset(r->q_outputs,0,sizeof(MSFifo*)*MSILBCENCODER_MAX_INPUTS);
}
void ms_ilbc_encoder_class_init(MSILBCEncoderClass *klass)
{
ms_filter_class_init(MS_FILTER_CLASS(klass));
ms_filter_class_set_name(MS_FILTER_CLASS(klass),"ILBCEnc");
MS_FILTER_CLASS(klass)->max_finputs=MSILBCENCODER_MAX_INPUTS;
MS_FILTER_CLASS(klass)->max_qoutputs=MSILBCENCODER_MAX_INPUTS;
MS_FILTER_CLASS(klass)->r_maxgran=ILBC_MAX_SAMPLES_PER_FRAME*2;
MS_FILTER_CLASS(klass)->set_property=(MSFilterPropertyFunc)ms_ilbc_encoder_set_property;
MS_FILTER_CLASS(klass)->get_property=(MSFilterPropertyFunc)ms_ilbc_encoder_get_property;
MS_FILTER_CLASS(klass)->setup=(MSFilterSetupFunc)ms_ilbc_encoder_setup;
MS_FILTER_CLASS(klass)->destroy=(MSFilterDestroyFunc)ms_ilbc_encoder_destroy;
MS_FILTER_CLASS(klass)->process=(MSFilterProcessFunc)ms_ilbc_encoder_process;
MS_FILTER_CLASS(klass)->info=(MSFilterInfo*)&ilbc_info;
}
void ms_ilbc_encoder_process(MSILBCEncoder *r)
{
MSFifo *fi;
MSQueue *qo;
MSMessage *m;
void *src=NULL;
float speech[ILBC_MAX_SAMPLES_PER_FRAME];
/* process output fifos, but there is only one for this class of filter*/
qo=r->q_outputs[0];
fi=r->f_inputs[0];
ms_fifo_get_read_ptr(fi,r->samples_per_frame*2,&src);
if (src==NULL) {
g_warning( "src=%p\n", src);
return;
}
m=ms_message_new(r->bytes_per_compressed_frame);
ilbc_read_16bit_samples((gint16*)src, speech, r->samples_per_frame);
iLBC_encode((unsigned char *)m->data, speech, &r->ilbc_enc);
ms_queue_put(qo,m);
}
void ms_ilbc_encoder_uninit(MSILBCEncoder *obj)
{
}
void ms_ilbc_encoder_destroy( MSILBCEncoder *obj)
{
ms_ilbc_encoder_uninit(obj);
g_free(obj);
}
#endif
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