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Voxifera
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Small code optimizations (moved constants to define(s) ) .

This commit is contained in:
evilsocket 2009-05-26 11:15:47 +02:00
parent c80f671655
commit 8d23b07db0
2 changed files with 7 additions and 7 deletions
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11
main.c
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@ -38,7 +38,7 @@ inline double taylor_cosine( double x, int terms ) {
quadrant = x * TWO_O_M_PI; /* 0, 1, 2 o 3 */
double x2, r;
/* tariamo x in modo tale che −π/2 < x < π/2 */
/* tariamo x in modo tale che −π < x < π */
x = x - quadrant * H_M_PI;
quadrant += 1;
x = offset[ (quadrant >> 1) & 1 ] - x;
@ -68,7 +68,6 @@ void helpandusage() {
int main (int argc, char **argv) {
int i, j, dsp, fd, ch, size, recognized;
int TOTSIZE = BUF_SIZE*SAMPLE_SIZE;
char *line, *tmp, *cmd = NULL, *fname = NULL, *device = NULL;
char **match = NULL;
@ -76,8 +75,6 @@ int main (int argc, char **argv) {
double deviance;
double *neutral, *trans;
double value, sum = 0.0;
double PIconst = (D_M_PI/TOTSIZE);
double coeff = 1.0 / TOTSIZE;
double t, v;
FILE *fp;
@ -140,21 +137,21 @@ int main (int argc, char **argv) {
for( j = 0; j < TOTSIZE; ++j ){
v += buf[j];
}
v *= coeff;
v *= M_COEFF;
v -= neutral[0];
v = (v >= 0) ? v : -v;
trans[0] = log(v);
double init = buf[0];
for( i = 1; i < TOTSIZE; ++i ) {
t = PIconst * i;
t = M_FACTOR * i;
v = init;
/* dato che ho inizializzato v a buf[0] e sono sicuro che t != 0,
* posso partire da j = 1 . */
for( j = 1; j < TOTSIZE; ++j ){
v += buf[j] * taylor_cosine( t * j, 10 );
}
v *= coeff;
v *= M_COEFF;
v -= neutral[i];
v = (v >= 0) ? v : -v;
trans[i] = log(v);

3
vocal.h
View File

@ -37,6 +37,9 @@
#define BUF_SIZE 2
#define SAMPLE_SIZE (int) (LENGTH*RATE*SIZE*CHANNELS/8)
#define TOTSIZE 16000 /* BUF_SIZE * SAMPLE_SIZE */
#define M_FACTOR 0.000392699 /* D_M_PI / TOTSIZE */
#define M_COEFF 0.0000625 /* 1.0 / TOTSIZE */
#ifndef M_PI
# define M_PI 3.14159265358979323846