经典的DSP的C程序和汇编程序库

/* SPXAMP.C is a file of files. First is an INCLUDE file which should*/ /* be labled SPAINCL.H and #included in each example, and may also be */ /* included in other programs. */ /* .................Begin include file.................*/ /* Latest date: 06/29/92 */ #include <math.h> /* In the VMS compiler, M_PI is not defined in math.h */ #ifdef vms #define M_PI 3.14159265358979323846 #endif #ifndef KR #define M_PI 3.14159265358979323846 #endif #define FALSE 0 #define TRUE 1 #define BIG 1e10 #define SMALL 1e-10 #define ORDER5 1e-5 #define ORDER4 1e-4 #define ABS(x) ((x) >= 0 ? (x) : -(x)) #define MIN(a,b) ((a) <= (b) ? (a) : (b)) #define MAX(a,b) ((a) >= (b) ? (a) : (b)) typedef struct { float r, i; } complex; typedef struct { double r, i; } doublecomplex; /* .................End of include file.................*/ /* SPA0301 */ #include "spaincl.h" long pos_i8 = 8; /* Initialized data */ float x[8] = { -6.0, -2.0, 0.0, 2.0, 4.0, 6.0, 3.0, -1.0 }; #ifndef KR main(void) #else main() #endif { /* Local variables */ void spdftr(); long m; complex y[5]; /* DEMONSTRATION OF THE USE OF SUBROUTINE SPDFTR. */ spdftr(x, y, &pos_i8); printf(" M REAL IMAGINARY\n"); for (m = 0 ; m <= 4 ; ++m) { printf("%2ld %10.4f %10.4f\n", m, y[m].r, y[m].i); } } /* SPA0302 */ #include "spaincl.h" long pos_i8 = 8; /* Initialized data */ float x[10] = { -6.0, -2.0, 0.0, 2.0, 4.0, 6.0, 3.0, -1.0, 0.0, 0.0}; #ifndef KR main(void) #else main() #endif { /* Local variables */ void spfftr(); long m; /* DEMONSTRATION OF THE USE OF SUBROUTINE SPFFTR. */ spfftr(x, &pos_i8); printf(" M REAL IMAGINARY\n"); for (m = 0 ; m <= 9 ; m += 2) { printf("%2ld %10.4f %10.4f\n", m / 2, x[m], x[m+1]); } } /* SPA0303 */ #include "spaincl.h" long pos_i8 = 8; /* Initialized data */ float x1[8] = { -6.0, -2.0, 0.0, 2.0, 4.0, 6.0, 3.0, -1.0 }; #ifndef KR main(void) #else main() #endif { /* Local variables */ void spdftr(), spidtr(); long k; complex y[5]; float x2[8]; /* DEMONSTRATION OF THE USE OF SPIDTR. */ spdftr(x1, y, &pos_i8); spidtr(y, x2, &pos_i8); printf(" K X(K)\t K X(K)\n"); for (k = 0 ; k <= 3 ; k++) { printf("%2ld %6.1f\t%2ld %6.1f\n", k, x2[k], k + 4, x2[k + 4]); } } /* SPA0304 */ #include "spaincl.h" long pos_i8 = 8; /* Initialized data */ float x[10] = { -6.0, -2.0, 0.0, 2.0, 4.0, 6.0, 3.0, -1.0, 0.0, 0.0 }; #ifndef KR main(void) #else main() #endif { /* Local variables */ void spfftr(), spiftr(); long k; /* DEMONSTRATION OF THE USE OF SUBROUTINE SPIFTR. */ spfftr(x, &pos_i8); spiftr(x, &pos_i8); printf(" K X(K)\t K X(K)\n"); for (k = 0 ; k <= 3 ; k++) { printf("%2ld %6.1f\t%2ld %6.1f\n",k, x[k], k + 4, x[k + 4]); } } /* SPA0305 */ #include "spaincl.h" long neg_i1 = -1; long pos_i1 = 1; long pos_i4 = 4; /* Initialized data */ complex x1[4] = { {2.0, 1.0 },{0.0, 2.0 }, {1.0, 1.0 },{-1.0, 0.0 } }; #ifndef KR main(void) #else main() #endif { /* Local variables */ void spdftc(); long i; complex x2[4]; /* DEMONSTRATION OF THE USE OF SUBROUTINE SPDFTC. */ spdftc(x1, x2, &pos_i4, &neg_i1); spdftc(x2, x1, &pos_i4, &pos_i1); printf(" I X1(I)\t\t X2(I)\n"); for (i = 0 ; i <= 3 ; i++) { printf("%2ld %4.1f %4.1f %12.7f %12.7f\n", i, x1[i].r, x1[i].i, x2[i].r, x2[i].i ); } } /* SPA0306 */ #include "spaincl.h" long neg_i1 = -1; long pos_i1 = 1; long pos_i4 = 4; /* Initialized data */ complex x1[4] = { {2.0, 1.0 },{0.0, 2.0 }, {1.0, 1.0 },{-1.0, 0.0 } }; #ifndef KR main(void) #else main() #endif { /* Local variables */ void spfftc(); long i, m; complex x2[4]; /* DEMONSTRATION OF THE USE OF SUBROUTINE SPFFTC. */ spfftc(x1, &pos_i4, &neg_i1); for (m = 0 ; m <= 3 ; ++m) { x2[m].r = x1[m].r; x2[m].i = x1[m].i; } spfftc(x1, &pos_i4, &pos_i1); printf(" I X1(I)\t\t X2(I)\n"); for (i = 0 ; i <= 3 ; i++) { printf("%2ld %4.1f %4.1f %12.7f %12.7f\n", i, x1[i].r, x1[i].i, x2[i].r, x2[i].i); } } /* SPA0307 */ #include "spaincl.h" long pos_i8 = 8; /* Initialized data */ float x[8] = { -6.0, -2.0, 0.0, 2.0, 4.0, 6.0, 3.0, -1.0 }; #ifndef KR main(void) #else main() #endif { /* Local variables */ long m; complex spcomp(), y; float tmp_float; /* DEMONSTRATION OF THE USE OF COMPLEX FUNCTION SPCOMP */ printf(" M REAL IMAGINARY\n"); for (m = 0 ; m <= 4 ; ++m) { tmp_float = m / 8.0; y = spcomp(x, &pos_i8, &tmp_float); printf("%2ld %10.4f %10.4f\n", m, y.r, y.i); } } /* SPA0401 */ #include "spaincl.h" long pos_i1 = 1; long pos_i16 = 16; long pos_i31 = 31; float f0 = 0.0; float pos_fp03125 = 0.03125; #ifndef KR main(void) #else main() #endif { /* Local variables */ void sppowr(); long k, error, nsgmts, number_points; float work[34], x[32], y[17]; /* GENERATES A PERIODOGRAM SIMILAR TO FIG. 4.1. */ for (k = 0 ; k <= 31 ; ++k) { x[k] = (float) sin(2.0 * M_PI * (double) k / 8.0); } sppowr(x, y, work, &pos_i31, &pos_i16, &pos_i1, &f0, &nsgmts, &error); printf(" NSGMTS,IERROR= %ld %ld\n", nsgmts, error); printf(" Y="); for (k = 0 ; k <= 16 ; ++k) { if ( k == 8 ) { printf("\n "); } printf("%7.3f", y[k]); } printf("\n"); number_points = 17; pfile2(&f0,&pos_fp03125,y,&number_points,&pos_i1,"P0401A"); } /* SPA0402 */ #include "spaincl.h" long pos_i1 = 1; long pos_i16 = 16; long pos_i999 = 999; float f0 = 0.0; float pos_fp03125 = 0.03125; #ifndef KR main(void) #else main() #endif { /* Local variables */ void sppowr(); long k, m, error, nsgmts, number_points; long seed; float work[34], x[1000], y[17]; double ex2, sprand(), tpower; /* POWER DENSITY SPECTRUM OF WHITE UNIFORM NOISE. */ seed = 12357; ex2 = 0.0; for (k = 0 ; k <= 999 ; ++k) { x[k] = (float) (6.0 * (sprand(&seed) - 0.5)); ex2 += (double) (x[k] * x[k] / 1000.0); } sppowr(x, y, work, &pos_i999, &pos_i16, &pos_i1, &f0, &nsgmts, &error); tpower = (double) ((y[0] + y[16]) / 32.0); for (m = 1 ; m <= 15 ; ++m) { tpower += ((double) y[m] * 2.0 / 32.0); } printf(" IERROR,NSGMTS= %ld %ld\n", error, nsgmts); printf(" Y="); for (k = 0 ; k <= 16 ; ++k) { if ( k == 8 ) { printf("\n "); } printf("%7.3f", y[k]); } printf("\n"); printf(" ACTUAL POWER, ESTIMATED POWER: %7.3f %7.3f\n", ex2, tpower); number_points = 17; pfile2(&f0,&pos_fp03125,y,&number_points,&pos_i1,"P0402A"); } /* SPA0403 */ #include "spaincl.h" long pos_i1 = 1; long pos_i16 = 16; long pos_i999 = 999; float f0 = 0.0; float pos_fp03125 = 0.03125; float pos_fp5 = 0.5; #ifndef KR main(void) #else main() #endif { /* Local variables */ void sppowr(); long k, m, error, nsgmts, number_points, work[34]; long seed; float x[1000], y[17]; double signal, sprand(), tmp_double; /* POWER DENSITY SPECTRUM OF SINE WAVE IN WHITE UNIFORM NOISE. */ seed = 12357; for (k = 0 ; k <= 999 ; ++k) { signal = sin(3.0 * M_PI * (double) k / 16.0) + 0.5 * sin(7.0 * M_PI * (double) k / 16.0); tmp_double = sqrt(0.12) * (sprand(&seed) - 0.5); x[k] = (float) (signal + sqrt(0.12) * (sprand(&seed) - 0.5))