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author | EliteTK <tomasz.kramkowski@gmail.com> | 2014-07-10 22:36:56 +0100 |
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committer | EliteTK <tomasz.kramkowski@gmail.com> | 2014-07-10 22:36:56 +0100 |
commit | b60441758f9832a67f60e51a4ee92d16b166b9fb (patch) | |
tree | 7388adc9743181457834cc5eed95e3c452266ab0 /fgen.c | |
parent | a26f2837166f7232d13322e013883ed003d46f27 (diff) | |
parent | a8609ccd901b1942e862c14205026d841e640add (diff) | |
download | c-stuff-b60441758f9832a67f60e51a4ee92d16b166b9fb.tar.gz c-stuff-b60441758f9832a67f60e51a4ee92d16b166b9fb.tar.xz c-stuff-b60441758f9832a67f60e51a4ee92d16b166b9fb.zip |
Merge branch 'master' of https://github.com/EliteTK/c-stuff
Conflicts:
xcb.c
Diffstat (limited to 'fgen.c')
-rw-r--r-- | fgen.c | 30 |
1 files changed, 30 insertions, 0 deletions
@@ -0,0 +1,30 @@ +#include <stdio.h> +#include <stdlib.h> +#include <math.h> + +int main(int argc, char **argv) +{ + if (argc != 4) { + fprintf(stderr, "Usage: %s <sampling-frequency> <frequency> <duration> [amplitude]\n", argv[0]); + exit(1); + } + + long int sfreq = strtol(argv[1], NULL, 10); + long double freq = strtod(argv[2], NULL); + if (freq <= 0) freq = 1; + long double duration = strtod(argv[3], NULL); + long double amplitude = 127; + + if (argc == 5) { + amplitude = strtol(argv[4], NULL, 10); + if (amplitude > 127) amplitude = 127; + else if (amplitude < 0) amplitude = 0; + } + + long double wave_length = sfreq / freq; + + for (long int i = 0; i < duration / 1000 * sfreq; i++) + putchar((char)((sinf(i / wave_length * M_PI_2 * 4) + 1) * amplitude)); + + return 0; +} |