static bool
do_set_volume(struct mixer *mixer, const char *name, unsigned volume)
{
struct mixer_ctl *ctl;
unsigned i;
ctl = mixer_get_ctl_by_name(mixer, name);
if (! ctl) {
fprintf(stderr, "Failed to find control: %s\n", name);
mixer_close(mixer);
return false;
}
for (i = 0; i < mixer_ctl_get_num_values(ctl); i++) {
mixer_ctl_set_percent(ctl, i, volume);
}
return true;
}
int write_percentage(int argc, char **argv) {
int nMixer = -1, nControl = -1;
int location = -1, value = -1;
if (argc == 6) {
nMixer = atoi(argv[2]);
nControl = atoi(argv[3]);
location = atoi(argv[4]);
value = atoi(argv[5]);
}
if (argc != 6 || nMixer < 0 || nMixer > 7 || nControl < 0 || location < 0) {
printf("Usage: ainfo write-percentage <card number> <control number> <location> <value>\n"
"where <card number> is between 0 and 7\n"
"<control number> is the control to be written\n"
"<location> is the location to be written\n"
"<value> is the value to be written\n");
return 0;
}
mixer *m = mixer_open(nMixer);
if (m == NULL) {
printf("Unable to open card #%d\n", nMixer);
return 0;
}
mixer_ctl *c = mixer_get_ctl(m, nControl);
if (c == NULL) {
printf("Unable to open control #%d\n", nControl);
return 0;
}
char name[64], type[64];
mixer_ctl_get_name(c, name, sizeof(name));
mixer_ctl_set_percent(c, location, value);
printf("Control: %s\nPercent: %d\nValue: %d\n", name,
mixer_ctl_get_percent(c, location), mixer_ctl_get_value(c, location));
return 0;
}
