gstreamer/gst-libs/gst/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));
}