ref: 6e3c1a2fa29c066f7d1a25037a1f61cd295ac3af
dir: /testsuite/lpc_test2_main.c/
/*************************************************************************/
/* */
/* Language Technologies Institute */
/* Carnegie Mellon University */
/* Copyright (c) 2001 */
/* All Rights Reserved. */
/* */
/* Permission is hereby granted, free of charge, to use and distribute */
/* this software and its documentation without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of this work, and to */
/* permit persons to whom this work is furnished to do so, subject to */
/* the following conditions: */
/* 1. The code must retain the above copyright notice, this list of */
/* conditions and the following disclaimer. */
/* 2. Any modifications must be clearly marked as such. */
/* 3. Original authors' names are not deleted. */
/* 4. The authors' names are not used to endorse or promote products */
/* derived from this software without specific prior written */
/* permission. */
/* */
/* CARNEGIE MELLON UNIVERSITY AND THE CONTRIBUTORS TO THIS WORK */
/* DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING */
/* ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT */
/* SHALL CARNEGIE MELLON UNIVERSITY NOR THE CONTRIBUTORS BE LIABLE */
/* FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES */
/* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN */
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/* THIS SOFTWARE. */
/* */
/*************************************************************************/
/* Author: Alan W Black (awb@cs.cmu.edu) */
/* Date: June 2001 */
/*************************************************************************/
/* */
/* residuals etc */
/* */
/*************************************************************************/
#include <stdio.h>
#include <math.h>
#include "cst_wave.h"
#include "cst_track.h"
#include "cst_sigpr.h"
void inv_lpc_filterd(short *sig, float *a, int order, double *res, int size)
{
int i, j;
double r;
for (i = 0; i < order; i++)
{
r = sig[i];
for (j = 1; j < order; j++)
/* if (i-j >= 0) */
r -= a[j] * (double)sig[i - j];
res[i] = r;
}
for (i = order; i < size; i++)
{
r = sig[i];
for (j = 1; j < order; j++)
r -= a[j] * (double)sig[i - j];
res[i] = r;
}
}
cst_wave *find_residual(cst_wave *sig, cst_track *lpc)
{
cst_wave *res;
int i;
double *resd;
int size,start,end;
res = new_wave();
cst_wave_resize(res,sig->num_samples,1);
res->sample_rate = sig->sample_rate;
resd = cst_alloc(double,sig->num_samples);
start = lpc->num_channels;
for (i=0; i<lpc->num_frames; i++)
{
end = (int)((float)sig->sample_rate * lpc->times[i]);
size = end - start;
inv_lpc_filterd(&sig->samples[start],lpc->frames[i],lpc->num_channels,
&resd[start],size);
start = end;
}
for (i=0; i<res->num_samples; i++)
res->samples[i] = resd[i];
cst_free(resd);
return res;
}
void lpc_filterd(short *res, float *a, int order, double *sig, int size)
{
int i, j;
double r;
for (i = 0; i < order; i++)
{
r = res[i];
for (j = 1; j < order; j++)
/* if (i-j >= 0) */
r += a[j] * (double)sig[i - j];
sig[i] = r;
}
for (i = order; i < size; i++)
{
r = res[i];
for (j = 1; j < order; j++)
r += a[j] * (double)sig[i - j];
sig[i] = r;
}
}
cst_wave *reconstruct_wave(cst_wave *res, cst_track *lpc)
{
cst_wave *sig;
int i;
double *sigd;
int start, end, size;
sig = new_wave();
cst_wave_resize(sig,res->num_samples,1);
sig->sample_rate = res->sample_rate;
sigd = cst_alloc(double,sig->num_samples);
start = 0;
for (i=0; i<lpc->num_frames; i++)
{
end = (int)((float)sig->sample_rate * lpc->times[i]);
size = end - start;
lpc_filterd(&res->samples[start],
lpc->frames[i],lpc->num_channels,
&sigd[start],size);
start = end;
}
for (i=0; i<sig->num_samples; i++)
sig->samples[i] = sigd[i];
cst_free(sigd);
return sig;
}
float lpc_min = -2.709040;
float lpc_range = 2.328840+2.709040;
void lpc_filterde(unsigned char *resulaw,
unsigned short *as, int order,
short *sig,
int size)
{
int i, j;
float r;
float *a;
float *sigf;
a = cst_alloc(float,order);
for (i=1; i<order; i++)
a[i] = (((float)as[i]/65535.0)*lpc_range)+lpc_min;
sigf = cst_alloc(float,size);
for (i=0; i<size; i++)
sigf[i] = sig[i];
for (i = 0; i < order; i++)
{
r = cst_ulaw_to_short(resulaw[i]);
for (j = 1; j < order; j++)
/* if (i-j >= 0) */
r += a[j] * (float)sigf[i - j];
sigf[i] = r;
}
for (i = order; i < size; i++)
{
r = cst_ulaw_to_short(resulaw[i]);
for (j = 1; j < order; j++)
r += a[j] * (float)sigf[i - j];
sigf[i] = r;
}
for (i=0; i<size; i++)
sig[i] = sigf[i];
cst_free(sigf);
/* cst_free(a); */
}
cst_wave *reconstruct_wavee(cst_wave *res, cst_track *lpc)
{
cst_wave *sig;
int i,j;
short *sigd;
int start, end, size;
unsigned short *as;
unsigned char *resulaw;
sig = new_wave();
cst_wave_resize(sig,res->num_samples,1);
sig->sample_rate = res->sample_rate;
sigd = cst_alloc(short,sig->num_samples);
as = cst_alloc(unsigned short,lpc->num_channels);
resulaw = cst_alloc(unsigned char, res->num_samples);
for (i=0; i<res->num_samples; i++)
resulaw[i] = cst_short_to_ulaw(res->samples[i]);
start = 0;
for (i=0; i<lpc->num_frames; i++)
{
end = (int)((float)sig->sample_rate * lpc->times[i]);
size = end - start;
for (j=1; j<lpc->num_channels; j++)
as[j] = (((lpc->frames[i][j]-lpc_min)/lpc_range)*65535.0);
lpc_filterde(&resulaw[start],
as,lpc->num_channels,
&sigd[start],size);
start = end;
}
for (i=0; i<sig->num_samples; i++)
sig->samples[i] = sigd[i];
cst_free(sigd);
return sig;
}
cst_wave *dumdum(cst_wave *res,cst_track *lpc)
{
cst_lpcres *lpcres;
int i,j,s;
unsigned short *bbb;
int start,end,size;
FILE *ofd;
lpcres = new_lpcres();
lpcres_resize_frames(lpcres,lpc->num_frames);
lpcres->num_channels = lpc->num_channels-1;
start = 0;
for (i=0; i<lpc->num_frames; i++)
{
bbb = cst_alloc(unsigned short,lpc->num_channels-1);
for (j=1; j<lpc->num_channels; j++)
bbb[j-1] = (unsigned short)
(((lpc->frames[i][j]-lpc_min)/lpc_range)*65535);
lpcres->frames[i] = bbb;
end = lpc->times[i]*res->sample_rate;
lpcres->times[i] = lpc->times[i];
size = end - start;
lpcres->sizes[i] = size;
start = end;
}
lpcres_resize_samples(lpcres,res->num_samples);
lpcres->lpc_min = lpc_min;
lpcres->lpc_range = lpc_range;
lpcres->sample_rate = res->sample_rate;
for (i=0; i<res->num_samples; i++)
lpcres->residual[i] = cst_short_to_ulaw(res->samples[i]);
ofd = fopen("lpc1.lpc","w");
for (s=0,i=0; i<lpcres->num_frames; i++)
{
fprintf(ofd,"%d %d %d\n",i,lpcres->times[i],lpcres->sizes[i]);
for (j=0; j < lpcres->num_channels; j++)
fprintf(ofd,"%d ",lpcres->frames[i][j]);
fprintf(ofd,"\n");
for (j=0; j < lpcres->sizes[i]; j++,s++)
fprintf(ofd,"%d ",lpcres->residual[s]);
fprintf(ofd,"\n");
}
fclose(ofd);
return lpc_resynth(lpcres);
}
int main(int argc, char **argv)
{
/* need that cool argument parser */
cst_wave *w,*res,*sig,*w2, *w3;
cst_track *lpc;
int i;
double r;
if (argc != 3)
{
fprintf(stderr,"usage: lpc_test2 LPC WAVEFILE\n");
return 1;
}
lpc = new_track();
cst_track_load_est(lpc,argv[1]);
sig = new_wave();
cst_wave_load_riff(sig,argv[2]);
res = find_residual(sig,lpc);
w = reconstruct_wave(res,lpc);
cst_wave_save_riff(res,"res.wav");
cst_wave_save_riff(w,"new.wav");
w2 = reconstruct_wavee(res,lpc);
cst_wave_save_riff(w2,"newe.wav");
w3 = dumdum(res,lpc);
cst_wave_save_riff(w3,"newr.wav");
for (r=0.0,i=0; i<sig->num_samples; i++)
r += ((float)sig->samples[i]-(float)w->samples[i]) *
((float)sig->samples[i]-(float)w->samples[i]);
r /= sig->num_samples;
printf("orig/new %f\n",sqrt(r));
for (r=0.0,i=0; i<sig->num_samples; i++)
r += ((float)sig->samples[i]-(float)w2->samples[i]) *
((float)sig->samples[i]-(float)w2->samples[i]);
r /= sig->num_samples;
printf("orig/newe %f\n",sqrt(r));
for (r=0.0,i=0; i<sig->num_samples; i++)
r += ((float)sig->samples[i]-(float)w3->samples[i]) *
((float)sig->samples[i]-(float)w3->samples[i]);
r /= sig->num_samples;
printf("orig/newr %f\n",sqrt(r));
return 0;
}