#include <string.h>
#include "../include/asoundlib.h"
+void show_status(void *handle)
+{
+ int err;
+ snd_timer_status_t status;
+
+ if ((err = snd_timer_status(handle, &status)) < 0) {
+ fprintf(stderr, "timer status %i (%s)\n", err, snd_strerror(err));
+ return;
+ }
+ printf("STATUS:\n");
+ printf(" resolution = %lu\n", status.resolution);
+ printf(" lost = %lu\n", status.lost);
+ printf(" overrun = %lu\n", status.overrun);
+ printf(" queue = %i\n", status.queue);
+}
+
void main(void)
{
int err;
void *handle;
- snd_timer_general_info_t info;
+ snd_timer_general_info_t ginfo;
+ snd_timer_select_t sel;
+ snd_timer_info_t info;
+ snd_timer_params_t params;
if ((err = snd_timer_open(&handle))<0) {
fprintf(stderr, "timer open %i (%s)\n", err, snd_strerror(err));
exit(0);
}
- if (snd_timer_general_info(handle, &info)<0) {
+ if (snd_timer_general_info(handle, &ginfo)<0) {
fprintf(stderr, "timer general info %i (%s)\n", err, snd_strerror(err));
exit(0);
}
- printf("global timers = %i\n", info.count);
+ printf("Global timers = %i\n", ginfo.count);
+ bzero(&sel, sizeof(sel));
+ sel.number = SND_TIMER_SYSTEM;
+ sel.slave = 0;
+ if ((err = snd_timer_select(handle, &sel)) < 0) {
+ fprintf(stderr, "timer select %i (%s)\n", err, snd_strerror(err));
+ exit(0);
+ }
+ if ((err = snd_timer_info(handle, &info)) < 0) {
+ fprintf(stderr, "timer info %i (%s)\n", err, snd_strerror(err));
+ exit(0);
+ }
+ printf("Timer %i info:\n", sel.number);
+ printf(" flags = 0x%x\n", info.flags);
+ printf(" id = '%s'\n", info.id);
+ printf(" name = '%s'\n", info.name);
+ printf(" max ticks = %lu\n", info.ticks);
+ printf(" average resolution = %lu\n", info.resolution);
+ bzero(¶ms, sizeof(params));
+ params.flags = SND_TIMER_PSFLG_AUTO;
+ params.ticks = (1000000000 / info.resolution) / 50; /* 50Hz */
+ if (params.ticks < 1)
+ params.ticks = 1;
+ printf("Using %lu tick(s)\n", params.ticks);
+ if ((err = snd_timer_params(handle, ¶ms)) < 0) {
+ fprintf(stderr, "timer params %i (%s)\n", err, snd_strerror(err));
+ exit(0);
+ }
+ show_status(handle);
+ if ((err = snd_timer_start(handle)) < 0) {
+ fprintf(stderr, "timer start %i (%s)\n", err, snd_strerror(err));
+ exit(0);
+ }
+ usleep(500000);
+ show_status(handle);
snd_timer_close(handle);
}