?? dct1d_test.c
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/*dct1d_test.ccreated mer jan 2 13:55:12 GMT 2002by Yann Guidon <whygee@f-cpu.org>this is a "wrapper" for the other fileswhich allows to test them.Here we use "float" because the codedoesn't contain the shifts and signcorrections required by integerarithmetics.compile with gcc -lm dct1d_test.c -Wall*/#include <stdio.h>#include <math.h>/* typedef signed short int sample; */typedef double sample;sample m1, m2, m3, m4, /* twiddle factors */ a0, a1, a2, a3, a4, a5, a6, a7, /* the inputs */ S0, S1, S2, S3, S4, S5, S6, S7; /* the outputs */static void DCT1D_01() {#include "dct1d_01.c"}static void DCT1D_05() {#include "dct1d_05.c"}int main() { sample l[8]; int i; m1 = cos(4*M_PI/16); m2 = cos(6*M_PI/16); m3 = cos(2*M_PI/16) - cos(6*M_PI/16); m4 = cos(2*M_PI/16) + cos(6*M_PI/16); for (i=0; i<8; i++) { l[i] = cos((i * M_PI)/4); } a0=l[0]; a1=l[1]; a2=l[2]; a3=l[3]; a4=l[4]; a5=l[5]; a6=l[6]; a7=l[7]; DCT1D_01(); printf("\n DCT8 intput : DCT8 output :\n\ a0 = %+.15f S0 = %+.15f\n\ a1 = %+.15f S1 = %+.15f\n\ a2 = %+.15f S2 = %+.15f\n\ a3 = %+.15f S3 = %+.15f\n\ a4 = %+.15f S4 = %+.15f\n\ a5 = %+.15f S5 = %+.15f\n\ a6 = %+.15f S6 = %+.15f\n\ a7 = %+.15f S7 = %+.15f\n\n", a0, S0, a1, S1, a2, S2, a3, S3, a4, S4, a5, S5, a6, S6, a7, S7); S0=S1=S2=S3=S4=S5=S6=S7=0; DCT1D_05(); printf("\n DCT8 intput : DCT8 output :\n\ a0 = %+.15f S0 = %+.15f\n\ a1 = %+.15f S1 = %+.15f\n\ a2 = %+.15f S2 = %+.15f\n\ a3 = %+.15f S3 = %+.15f\n\ a4 = %+.15f S4 = %+.15f\n\ a5 = %+.15f S5 = %+.15f\n\ a6 = %+.15f S6 = %+.15f\n\ a7 = %+.15f S7 = %+.15f\n\n", a0, S0, a1, S1, a2, S2, a3, S3, a4, S4, a5, S5, a6, S6, a7, S7); return 0;}?? 快捷鍵說明
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