mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-12-22 16:26:39 +00:00
352 lines
6.2 KiB
C
352 lines
6.2 KiB
C
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#include <stdio.h>
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#include <stdlib.h>
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#include <math.h>
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#include <sys/time.h>
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#include <resample.h>
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#define AMP 16000
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#define I_RATE 48000
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#define O_RATE 44100
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//#define O_RATE 24000
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//#define test_func(x) 1
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//#define test_func(x) sin(2*M_PI*(x)*10)
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//#define test_func(x) sin(2*M_PI*(x)*(x)*1000)
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#define test_func(x) sin(2*M_PI*(x)*(x)*12000)
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short i_buf[I_RATE*2*2];
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short o_buf[O_RATE*2*2];
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static int i_offset;
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static int o_offset;
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FILE *out;
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void test_res1(void);
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void test_res2(void);
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void test_res3(void);
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void test_res4(void);
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void test_res5(void);
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void test_res6(void);
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void test_res7(void);
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int main(int argc,char *argv[])
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{
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out = fopen("out","w");
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test_res7();
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return 0;
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}
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void *get_buffer(void *priv, unsigned int size)
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{
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void *ret;
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ret = ((void *)o_buf) + o_offset;
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o_offset += size;
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return ret;
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}
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struct timeval start_time;
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void start_timer(void)
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{
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gettimeofday(&start_time,NULL);
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//printf("start %ld.%06ld\n",start_time.tv_sec,start_time.tv_usec);
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}
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void end_timer(void)
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{
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struct timeval end_time;
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double diff;
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gettimeofday(&end_time,NULL);
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//printf("end %ld.%06ld\n",end_time.tv_sec,end_time.tv_usec);
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diff = (end_time.tv_sec - start_time.tv_sec) +
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1e-6*(end_time.tv_usec - start_time.tv_usec);
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printf("time %g\n",diff);
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}
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void test_res1(void)
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{
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resample_t *r;
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int i;
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double sum10k,sum22k;
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double f;
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int n10k,n22k;
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double x;
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for(i=0;i<I_RATE;i++){
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i_buf[i*2+0] = rint(AMP * test_func((double)i/I_RATE));
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//i_buf[i*2+1] = rint(AMP * test_func((double)i/I_RATE));
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i_buf[i*2+1] = (i<1000)?AMP:0;
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}
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r = malloc(sizeof(resample_t));
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memset(r,0,sizeof(resample_t));
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r->i_rate = I_RATE;
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r->o_rate = O_RATE;
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//r->method = RESAMPLE_SINC_SLOW;
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r->method = RESAMPLE_SINC;
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r->channels = 2;
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//r->verbose = 1;
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r->filter_length = 64;
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r->get_buffer = get_buffer;
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resample_init(r);
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start_timer();
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#define blocked
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#ifdef blocked
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for(i=0;i+256<I_RATE;i+=256){
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resample_scale(r,i_buf+i*2,256*2*2);
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}
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if(I_RATE-i){
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resample_scale(r,i_buf+i*2,(I_RATE-i)*2*2);
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}
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#else
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resample_scale(r,i_buf,I_RATE*2*2);
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#endif
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end_timer();
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for(i=0;i<O_RATE;i++){
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f = AMP*test_func((double)i/O_RATE);
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//f = rint(AMP*test_func((double)i/O_RATE));
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fprintf(out,"%d %d %d %g %g\n",i,
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o_buf[2*i+0],o_buf[2*i+1],
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f,o_buf[2*i+0]-f);
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}
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sum10k=0;
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sum22k=0;
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n10k=0;
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n22k=0;
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for(i=0;i<O_RATE;i++){
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f = AMP*test_func((double)i/O_RATE);
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//f = rint(AMP*test_func((double)i/O_RATE));
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x = o_buf[2*i+0]-f;
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if(((0.5*i)/O_RATE*I_RATE)<10000){
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sum10k += x*x;
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n10k++;
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}
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if(((0.5*i)/O_RATE*I_RATE)<22050){
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sum22k += x*x;
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n22k++;
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}
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}
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printf("average error 10k=%g 22k=%g\n",
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sqrt(sum10k/n10k),
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sqrt(sum22k/n22k));
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}
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void test_res2(void)
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{
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functable_t *t;
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int i;
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double x;
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double f1,f2;
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t = malloc(sizeof(*t));
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memset(t,0,sizeof(*t));
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t->start = -50.0;
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t->offset = 1;
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t->len = 100;
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t->func_x = functable_sinc;
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t->func_dx = functable_dsinc;
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functable_init(t);
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for(i=0;i<1000;i++){
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x = -50.0 + 0.1 * i;
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f1 = functable_sinc(NULL,x);
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f2 = functable_eval(t,x);
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fprintf(out,"%d %g %g %g\n",i,f1,f2,f1-f2);
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}
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}
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void test_res3(void)
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{
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functable_t *t;
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int i;
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double x;
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double f1,f2;
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int n = 1;
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t = malloc(sizeof(*t));
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memset(t,0,sizeof(*t));
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t->start = -50.0;
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t->offset = 1.0 / n;
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t->len = 100 * n;
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t->func_x = functable_sinc;
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t->func_dx = functable_dsinc;
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t->func2_x = functable_window_std;
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t->func2_dx = functable_window_dstd;
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t->scale = 1.0;
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t->scale2 = 1.0 / (M_PI * 16);
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functable_init(t);
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for(i=0;i<1000 * n;i++){
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x = -50.0 + 0.1/n * i;
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f1 = functable_sinc(NULL,t->scale * x) *
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functable_window_std(NULL,t->scale2 * x);
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f2 = functable_eval(t,x);
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fprintf(out,"%d %g %g %g\n",i,f1,f2,f2-f1);
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}
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}
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double sinc_poly(double x)
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{
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#define INV3FAC 1.66666666666666666e-1
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#define INV5FAC 8.33333333333333333e-3
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#define INV7FAC 1.984126984e-4
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#define INV9FAC 2.755731922e-6
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#define INV11FAC 2.505210839e-8
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double x2 = x * x;
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return 1
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- x2 * INV3FAC
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+ x2 * x2 * INV5FAC
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- x2 * x2 * x2 * INV7FAC;
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//+ x2 * x2 * x2 * x2 * INV9FAC
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//- x2 * x2 * x2 * x2 * x2 * INV11FAC;
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}
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void test_res4(void)
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{
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int i;
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double x,f1,f2;
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for(i=1;i<100;i++){
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x = 0.01 * i;
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f1 = 1 - sin(x)/x;
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f2 = 1 - sinc_poly(x);
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fprintf(out,"%g %.20g %.20g %.20g\n",x,f1,f2,f2-f1);
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}
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}
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void test_res5(void)
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{
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int i;
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double sum;
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start_timer();
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sum = 0;
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for(i=0;i<I_RATE;i++){
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sum += i_buf[i*2];
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}
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end_timer();
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i_buf[0] = sum;
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}
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void short_to_double(double *d,short *x) { *d = *x; }
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void short_to_float(float *f,short *x) { *f = *x; }
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void float_to_double(double *f,float *x) { *f = *x; }
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void double_to_short(short *f,double *x) { *f = *x; }
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double res6_tmp[1000];
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void test_res6(void)
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{
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int i;
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for(i=0;i<I_RATE;i++){
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i_buf[i] = rint(AMP * test_func((double)i/I_RATE));
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}
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conv_double_short_ref(res6_tmp,i_buf,1000);
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for(i=0;i<1000;i++){
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res6_tmp[i] *= 3.0;
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}
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conv_short_double_ppcasm(o_buf,res6_tmp,1000);
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for(i=0;i<1000;i++){
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fprintf(out,"%d %d %g %d\n",i,i_buf[i],res6_tmp[i],o_buf[i]);
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}
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}
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void test_res7(void)
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{
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resample_t *r;
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int i;
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double sum10k,sum22k;
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double f;
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int n10k,n22k;
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double x;
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for(i=0;i<I_RATE;i++){
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i_buf[i] = rint(AMP * test_func((double)i/I_RATE));
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}
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r = malloc(sizeof(resample_t));
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memset(r,0,sizeof(resample_t));
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r->i_rate = I_RATE;
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r->o_rate = O_RATE;
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//r->method = RESAMPLE_SINC_SLOW;
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r->method = RESAMPLE_SINC;
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r->channels = 1;
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//r->verbose = 1;
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r->filter_length = 64;
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r->get_buffer = get_buffer;
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resample_init(r);
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start_timer();
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#define blocked
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#ifdef blocked
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for(i=0;i+256<I_RATE;i+=256){
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resample_scale(r,i_buf+i,256*2);
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}
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if(I_RATE-i){
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resample_scale(r,i_buf+i,(I_RATE-i)*2);
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}
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#else
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resample_scale(r,i_buf,I_RATE*2);
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#endif
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end_timer();
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for(i=0;i<O_RATE;i++){
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f = AMP*test_func((double)i/O_RATE);
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//f = rint(AMP*test_func((double)i/O_RATE));
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fprintf(out,"%d %d %d %g %g\n",i,
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o_buf[i],0,
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f,o_buf[i]-f);
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}
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sum10k=0;
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sum22k=0;
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n10k=0;
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n22k=0;
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for(i=0;i<O_RATE;i++){
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f = AMP*test_func((double)i/O_RATE);
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//f = rint(AMP*test_func((double)i/O_RATE));
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x = o_buf[i]-f;
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if(((0.5*i)/O_RATE*I_RATE)<10000){
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sum10k += x*x;
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n10k++;
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}
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if(((0.5*i)/O_RATE*I_RATE)<22050){
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sum22k += x*x;
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n22k++;
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}
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}
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printf("average error 10k=%g 22k=%g\n",
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sqrt(sum10k/n10k),
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sqrt(sum22k/n22k));
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}
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