mirror of
https://gitlab.linphone.org/BC/public/linphone-iphone.git
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2b8200409c
git-svn-id: svn+ssh://svn.savannah.nongnu.org/linphone/trunk@1 3f6dc0c8-ddfe-455d-9043-3cd528dc4637
129 lines
3.5 KiB
C
129 lines
3.5 KiB
C
/*
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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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "msLPC10decoder.h"
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#include "msLPC10encoder.h"
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#include <stdlib.h>
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#include <lpc10.h>
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extern MSFilter * ms_LPC10encoder_new(void);
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MSCodecInfo LPC10info={
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{
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"LPC10-15 codec",
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0,
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MS_FILTER_AUDIO_CODEC,
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ms_LPC10encoder_new,
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"A low quality but very low bit rate codec from the U.S. Department of Defense."
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},
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ms_LPC10encoder_new,
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ms_LPC10decoder_new,
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360,
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7,
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2400,
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8000,
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115,
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"1015",
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1,
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1,
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};
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static MSLPC10DecoderClass *ms_LPC10decoder_class=NULL;
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MSFilter * ms_LPC10decoder_new(void)
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{
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MSLPC10Decoder *r;
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r=g_new(MSLPC10Decoder,1);
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ms_LPC10decoder_init(r);
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if (ms_LPC10decoder_class==NULL)
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{
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ms_LPC10decoder_class=g_new(MSLPC10DecoderClass,1);
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ms_LPC10decoder_class_init(ms_LPC10decoder_class);
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}
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MS_FILTER(r)->klass=MS_FILTER_CLASS(ms_LPC10decoder_class);
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return(MS_FILTER(r));
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}
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/* FOR INTERNAL USE*/
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void ms_LPC10decoder_init(MSLPC10Decoder *r)
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{
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ms_filter_init(MS_FILTER(r));
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MS_FILTER(r)->infifos=r->f_inputs;
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MS_FILTER(r)->outfifos=r->f_outputs;
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MS_FILTER(r)->r_mingran=7;
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memset(r->f_inputs,0,sizeof(MSFifo*)*MSLPC10DECODER_MAX_INPUTS);
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memset(r->f_outputs,0,sizeof(MSFifo*)*MSLPC10DECODER_MAX_INPUTS);
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r->lpc10_dec=create_lpc10_decoder_state();
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}
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void ms_LPC10decoder_class_init(MSLPC10DecoderClass *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),"LPC10Dec");
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MS_FILTER_CLASS(klass)->max_finputs=MSLPC10DECODER_MAX_INPUTS;
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MS_FILTER_CLASS(klass)->max_foutputs=MSLPC10DECODER_MAX_INPUTS;
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MS_FILTER_CLASS(klass)->r_maxgran=7;
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MS_FILTER_CLASS(klass)->w_maxgran=LPC10_SAMPLES_PER_FRAME*2;
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MS_FILTER_CLASS(klass)->destroy=(MSFilterDestroyFunc)ms_LPC10decoder_destroy;
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MS_FILTER_CLASS(klass)->process=(MSFilterProcessFunc)ms_LPC10decoder_process;
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MS_FILTER_CLASS(klass)->info=(MSFilterInfo*)&LPC10info;
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}
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void ms_LPC10decoder_process(MSLPC10Decoder *r)
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{
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MSFifo *fi,*fo;
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int err1;
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void *s,*d;
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float speech[LPC10_SAMPLES_PER_FRAME];
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INT32 bits[LPC10_BITS_IN_COMPRESSED_FRAME];
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/* process output fifos, but there is only one for this class of filter*/
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fi=r->f_inputs[0];
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fo=r->f_outputs[0];
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if (fi!=NULL)
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{
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err1=ms_fifo_get_read_ptr(fi,7,&s);
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if (err1>0)
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{
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err1=ms_fifo_get_write_ptr(fo,LPC10_SAMPLES_PER_FRAME*2,&d);
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if (d!=NULL)
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{
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read_bits(s, bits, LPC10_BITS_IN_COMPRESSED_FRAME);
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lpc10_decode(bits,speech, r->lpc10_dec);
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write_16bit_samples((INT16*)d, speech, LPC10_SAMPLES_PER_FRAME);
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}
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}
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}
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}
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void ms_LPC10decoder_uninit(MSLPC10Decoder *obj)
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{
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free(obj->lpc10_dec);
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}
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void ms_LPC10decoder_destroy( MSLPC10Decoder *obj)
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{
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ms_LPC10decoder_uninit(obj);
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g_free(obj);
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}
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