gstreamer/libs/resample/test.c

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#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <sys/time.h>
#include <resample.h>
#define AMP 16000
#define I_RATE 48000
#define O_RATE 44100
//#define O_RATE 24000
//#define test_func(x) 1
//#define test_func(x) sin(2*M_PI*(x)*10)
//#define test_func(x) sin(2*M_PI*(x)*(x)*1000)
#define test_func(x) sin(2*M_PI*(x)*(x)*12000)
short i_buf[I_RATE*2*2];
short o_buf[O_RATE*2*2];
static int i_offset;
static int o_offset;
FILE *out;
void test_res1(void);
void test_res2(void);
void test_res3(void);
void test_res4(void);
void test_res5(void);
void test_res6(void);
void test_res7(void);
int main(int argc,char *argv[])
{
out = fopen("out","w");
test_res7();
return 0;
}
void *get_buffer(void *priv, unsigned int size)
{
void *ret;
ret = ((void *)o_buf) + o_offset;
o_offset += size;
return ret;
}
struct timeval start_time;
void start_timer(void)
{
gettimeofday(&start_time,NULL);
//printf("start %ld.%06ld\n",start_time.tv_sec,start_time.tv_usec);
}
void end_timer(void)
{
struct timeval end_time;
double diff;
gettimeofday(&end_time,NULL);
//printf("end %ld.%06ld\n",end_time.tv_sec,end_time.tv_usec);
diff = (end_time.tv_sec - start_time.tv_sec) +
1e-6*(end_time.tv_usec - start_time.tv_usec);
printf("time %g\n",diff);
}
void test_res1(void)
{
resample_t *r;
int i;
double sum10k,sum22k;
double f;
int n10k,n22k;
double x;
for(i=0;i<I_RATE;i++){
i_buf[i*2+0] = rint(AMP * test_func((double)i/I_RATE));
//i_buf[i*2+1] = rint(AMP * test_func((double)i/I_RATE));
i_buf[i*2+1] = (i<1000)?AMP:0;
}
r = malloc(sizeof(resample_t));
memset(r,0,sizeof(resample_t));
r->i_rate = I_RATE;
r->o_rate = O_RATE;
//r->method = RESAMPLE_SINC_SLOW;
r->method = RESAMPLE_SINC;
r->channels = 2;
//r->verbose = 1;
r->filter_length = 64;
r->get_buffer = get_buffer;
resample_init(r);
start_timer();
#define blocked
#ifdef blocked
for(i=0;i+256<I_RATE;i+=256){
resample_scale(r,i_buf+i*2,256*2*2);
}
if(I_RATE-i){
resample_scale(r,i_buf+i*2,(I_RATE-i)*2*2);
}
#else
resample_scale(r,i_buf,I_RATE*2*2);
#endif
end_timer();
for(i=0;i<O_RATE;i++){
f = AMP*test_func((double)i/O_RATE);
//f = rint(AMP*test_func((double)i/O_RATE));
fprintf(out,"%d %d %d %g %g\n",i,
o_buf[2*i+0],o_buf[2*i+1],
f,o_buf[2*i+0]-f);
}
sum10k=0;
sum22k=0;
n10k=0;
n22k=0;
for(i=0;i<O_RATE;i++){
f = AMP*test_func((double)i/O_RATE);
//f = rint(AMP*test_func((double)i/O_RATE));
x = o_buf[2*i+0]-f;
if(((0.5*i)/O_RATE*I_RATE)<10000){
sum10k += x*x;
n10k++;
}
if(((0.5*i)/O_RATE*I_RATE)<22050){
sum22k += x*x;
n22k++;
}
}
printf("average error 10k=%g 22k=%g\n",
sqrt(sum10k/n10k),
sqrt(sum22k/n22k));
}
void test_res2(void)
{
functable_t *t;
int i;
double x;
double f1,f2;
t = malloc(sizeof(*t));
memset(t,0,sizeof(*t));
t->start = -50.0;
t->offset = 1;
t->len = 100;
t->func_x = functable_sinc;
t->func_dx = functable_dsinc;
functable_init(t);
for(i=0;i<1000;i++){
x = -50.0 + 0.1 * i;
f1 = functable_sinc(NULL,x);
f2 = functable_eval(t,x);
fprintf(out,"%d %g %g %g\n",i,f1,f2,f1-f2);
}
}
void test_res3(void)
{
functable_t *t;
int i;
double x;
double f1,f2;
int n = 1;
t = malloc(sizeof(*t));
memset(t,0,sizeof(*t));
t->start = -50.0;
t->offset = 1.0 / n;
t->len = 100 * n;
t->func_x = functable_sinc;
t->func_dx = functable_dsinc;
t->func2_x = functable_window_std;
t->func2_dx = functable_window_dstd;
t->scale = 1.0;
t->scale2 = 1.0 / (M_PI * 16);
functable_init(t);
for(i=0;i<1000 * n;i++){
x = -50.0 + 0.1/n * i;
f1 = functable_sinc(NULL,t->scale * x) *
functable_window_std(NULL,t->scale2 * x);
f2 = functable_eval(t,x);
fprintf(out,"%d %g %g %g\n",i,f1,f2,f2-f1);
}
}
double sinc_poly(double x)
{
#define INV3FAC 1.66666666666666666e-1
#define INV5FAC 8.33333333333333333e-3
#define INV7FAC 1.984126984e-4
#define INV9FAC 2.755731922e-6
#define INV11FAC 2.505210839e-8
double x2 = x * x;
return 1
- x2 * INV3FAC
+ x2 * x2 * INV5FAC
- x2 * x2 * x2 * INV7FAC;
//+ x2 * x2 * x2 * x2 * INV9FAC
//- x2 * x2 * x2 * x2 * x2 * INV11FAC;
}
void test_res4(void)
{
int i;
double x,f1,f2;
for(i=1;i<100;i++){
x = 0.01 * i;
f1 = 1 - sin(x)/x;
f2 = 1 - sinc_poly(x);
fprintf(out,"%g %.20g %.20g %.20g\n",x,f1,f2,f2-f1);
}
}
void test_res5(void)
{
int i;
double sum;
start_timer();
sum = 0;
for(i=0;i<I_RATE;i++){
sum += i_buf[i*2];
}
end_timer();
i_buf[0] = sum;
}
void short_to_double(double *d,short *x) { *d = *x; }
void short_to_float(float *f,short *x) { *f = *x; }
void float_to_double(double *f,float *x) { *f = *x; }
void double_to_short(short *f,double *x) { *f = *x; }
double res6_tmp[1000];
void test_res6(void)
{
int i;
for(i=0;i<I_RATE;i++){
i_buf[i] = rint(AMP * test_func((double)i/I_RATE));
}
conv_double_short_ref(res6_tmp,i_buf,1000);
for(i=0;i<1000;i++){
res6_tmp[i] *= 3.0;
}
conv_short_double_ppcasm(o_buf,res6_tmp,1000);
for(i=0;i<1000;i++){
fprintf(out,"%d %d %g %d\n",i,i_buf[i],res6_tmp[i],o_buf[i]);
}
}
void test_res7(void)
{
resample_t *r;
int i;
double sum10k,sum22k;
double f;
int n10k,n22k;
double x;
for(i=0;i<I_RATE;i++){
i_buf[i] = rint(AMP * test_func((double)i/I_RATE));
}
r = malloc(sizeof(resample_t));
memset(r,0,sizeof(resample_t));
r->i_rate = I_RATE;
r->o_rate = O_RATE;
//r->method = RESAMPLE_SINC_SLOW;
r->method = RESAMPLE_SINC;
r->channels = 1;
//r->verbose = 1;
r->filter_length = 64;
r->get_buffer = get_buffer;
resample_init(r);
start_timer();
#define blocked
#ifdef blocked
for(i=0;i+256<I_RATE;i+=256){
resample_scale(r,i_buf+i,256*2);
}
if(I_RATE-i){
resample_scale(r,i_buf+i,(I_RATE-i)*2);
}
#else
resample_scale(r,i_buf,I_RATE*2);
#endif
end_timer();
for(i=0;i<O_RATE;i++){
f = AMP*test_func((double)i/O_RATE);
//f = rint(AMP*test_func((double)i/O_RATE));
fprintf(out,"%d %d %d %g %g\n",i,
o_buf[i],0,
f,o_buf[i]-f);
}
sum10k=0;
sum22k=0;
n10k=0;
n22k=0;
for(i=0;i<O_RATE;i++){
f = AMP*test_func((double)i/O_RATE);
//f = rint(AMP*test_func((double)i/O_RATE));
x = o_buf[i]-f;
if(((0.5*i)/O_RATE*I_RATE)<10000){
sum10k += x*x;
n10k++;
}
if(((0.5*i)/O_RATE*I_RATE)<22050){
sum22k += x*x;
n22k++;
}
}
printf("average error 10k=%g 22k=%g\n",
sqrt(sum10k/n10k),
sqrt(sum22k/n22k));
}