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195 lines
5.2 KiB
195 lines
5.2 KiB
/*
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The mediastreamer library aims at providing modular media processing and I/O
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for linphone, but also for any telephony application.
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Copyright (C) 2001 Simon MORLAT simon.morlat@linphone.org
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <config.h>
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#ifdef HAVE_ILBC
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#include "msilbcdec.h"
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#include "msilbcenc.h"
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#include "mscodec.h"
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#include <stdlib.h>
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#include <stdio.h>
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extern MSFilter * ms_ilbc_encoder_new(void);
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MSCodecInfo ilbc_info={
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{
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"iLBC codec",
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0,
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MS_FILTER_AUDIO_CODEC,
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ms_ilbc_encoder_new,
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"A speech codec suitable for robust voice communication over IP"
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},
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ms_ilbc_encoder_new,
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ms_ilbc_decoder_new,
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0, /* not applicable, 2 modes */
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0, /* not applicable, 2 modes */
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15200,
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8000,
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97,
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"iLBC",
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1,
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1,
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};
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void ms_ilbc_codec_init()
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{
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ms_filter_register(MS_FILTER_INFO(&ilbc_info));
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}
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static MSILBCDecoderClass *ms_ilbc_decoder_class=NULL;
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MSFilter * ms_ilbc_decoder_new(void)
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{
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MSILBCDecoder *r;
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r=g_new(MSILBCDecoder,1);
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ms_ilbc_decoder_init(r);
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if (ms_ilbc_decoder_class==NULL)
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{
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ms_ilbc_decoder_class=g_new(MSILBCDecoderClass,1);
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ms_ilbc_decoder_class_init(ms_ilbc_decoder_class);
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}
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MS_FILTER(r)->klass=MS_FILTER_CLASS(ms_ilbc_decoder_class);
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return(MS_FILTER(r));
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}
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int ms_ilbc_decoder_set_property(MSILBCDecoder *obj, MSFilterProperty prop, char *value)
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{
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switch(prop){
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case MS_FILTER_PROPERTY_FMTP:
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if (value == NULL) return 0;
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if (strstr(value,"ptime=20")!=NULL) obj->ms_per_frame=20;
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else if (strstr(value,"ptime=30")!=NULL) obj->ms_per_frame=30;
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else g_warning("Unrecognized fmtp parameter for ilbc encoder!");
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break;
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}
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return 0;
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}
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int ms_ilbc_decoder_get_property(MSILBCDecoder *obj, MSFilterProperty prop, char *value)
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{
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switch(prop){
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case MS_FILTER_PROPERTY_FMTP:
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if (obj->ms_per_frame==20) strncpy(value,"ptime=20",MS_FILTER_PROPERTY_STRING_MAX_SIZE);
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if (obj->ms_per_frame==30) strncpy(value,"ptime=30",MS_FILTER_PROPERTY_STRING_MAX_SIZE);
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break;
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}
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return 0;
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}
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void ms_ilbc_decoder_setup(MSILBCDecoder *r)
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{
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MSFilterClass *klass = NULL;
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switch (r->ms_per_frame) {
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case 20:
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r->samples_per_frame = BLOCKL_20MS;
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r->bytes_per_compressed_frame = NO_OF_BYTES_20MS;
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break;
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case 30:
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r->samples_per_frame = BLOCKL_30MS;
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r->bytes_per_compressed_frame = NO_OF_BYTES_30MS;
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break;
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default:
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g_error("ms_ilbc_decoder_setup: Bad value for ptime (%i)",r->ms_per_frame);
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}
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g_message("Using ilbc decoder with %i ms frames mode.",r->ms_per_frame);
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initDecode(&r->ilbc_dec, r->ms_per_frame /* ms frames */, /* user enhancer */ 0);
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}
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/* FOR INTERNAL USE*/
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void ms_ilbc_decoder_init(MSILBCDecoder *r)
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{
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/* default bitrate */
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r->bitrate = 15200;
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r->ms_per_frame = 30;
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r->samples_per_frame = BLOCKL_20MS;
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r->bytes_per_compressed_frame = NO_OF_BYTES_20MS;
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ms_filter_init(MS_FILTER(r));
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MS_FILTER(r)->inqueues=r->q_inputs;
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MS_FILTER(r)->outfifos=r->f_outputs;
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memset(r->q_inputs,0,sizeof(MSFifo*)*MSILBCDECODER_MAX_INPUTS);
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memset(r->f_outputs,0,sizeof(MSFifo*)*MSILBCDECODER_MAX_INPUTS);
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}
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void ms_ilbc_decoder_class_init(MSILBCDecoderClass *klass)
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{
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ms_filter_class_init(MS_FILTER_CLASS(klass));
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ms_filter_class_set_name(MS_FILTER_CLASS(klass),"ILBCDec");
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MS_FILTER_CLASS(klass)->max_qinputs=MSILBCDECODER_MAX_INPUTS;
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MS_FILTER_CLASS(klass)->max_foutputs=MSILBCDECODER_MAX_INPUTS;
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MS_FILTER_CLASS(klass)->w_maxgran= ILBC_MAX_SAMPLES_PER_FRAME*2;
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MS_FILTER_CLASS(klass)->destroy=(MSFilterDestroyFunc)ms_ilbc_decoder_destroy;
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MS_FILTER_CLASS(klass)->set_property=(MSFilterPropertyFunc)ms_ilbc_decoder_set_property;
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MS_FILTER_CLASS(klass)->get_property=(MSFilterPropertyFunc)ms_ilbc_decoder_get_property;
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MS_FILTER_CLASS(klass)->setup=(MSFilterSetupFunc)ms_ilbc_decoder_setup;
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MS_FILTER_CLASS(klass)->process=(MSFilterProcessFunc)ms_ilbc_decoder_process;
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MS_FILTER_CLASS(klass)->info=(MSFilterInfo*)&ilbc_info;
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}
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void ms_ilbc_decoder_process(MSILBCDecoder *r)
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{
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MSFifo *fo;
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MSQueue *qi;
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int err1;
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void *dst=NULL;
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float speech[ILBC_MAX_SAMPLES_PER_FRAME];
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MSMessage *m;
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qi=r->q_inputs[0];
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fo=r->f_outputs[0];
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m=ms_queue_get(qi);
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ms_fifo_get_write_ptr(fo, r->samples_per_frame*2, &dst);
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if (dst!=NULL){
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if (m->data!=NULL){
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if (m->size<r->bytes_per_compressed_frame) {
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g_warning("Invalid ilbc frame ?");
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}
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iLBC_decode(speech, m->data, &r->ilbc_dec, /* mode */1);
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}else{
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iLBC_decode(speech,NULL, &r->ilbc_dec,0);
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}
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ilbc_write_16bit_samples((gint16*)dst, speech, r->samples_per_frame);
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}
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ms_message_destroy(m);
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}
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void ms_ilbc_decoder_uninit(MSILBCDecoder *obj)
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{
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}
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void ms_ilbc_decoder_destroy( MSILBCDecoder *obj)
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{
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ms_ilbc_decoder_uninit(obj);
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g_free(obj);
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}
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#endif
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