#include <stdio.h>
+#include <stdlib.h>
#include <string.h>
#include "../include/asoundlib.h"
printf(" queue = %i\n", status.queue);
}
-void main(void)
+void read_loop(void *handle, int master_ticks, int timeout)
{
- int err;
+ int err, max;
+ fd_set in;
+ struct timeval tv;
+ snd_timer_read_t tr;
+
+ while (master_ticks-- > 0) {
+ FD_ZERO(&in);
+ max = snd_timer_file_descriptor(handle);
+ FD_SET(max, &in);
+ tv.tv_sec = timeout;
+ tv.tv_usec = 0;
+ if ((err = select(max + 1, &in, NULL, NULL, &tv)) < 0) {
+ fprintf(stderr, "select error %i (%s)\n", err, strerror(err));
+ exit(0);
+ }
+ if (err == 0) {
+ fprintf(stderr, "timer time out!!\n");
+ exit(0);
+ }
+ while (snd_timer_read(handle, &tr, sizeof(tr)) == sizeof(tr)) {
+ printf("TIMER: resolution = %lu, ticks = %lu\n",
+ tr.resolution, tr.ticks);
+ }
+ }
+}
+
+void main(int argc, char *argv[])
+{
+ int idx, err;
+ int timer = SND_TIMER_SYSTEM;
+ int slave = 0;
+ int slave_type = SND_TIMER_STYPE_SEQUENCER, slave_id = 0;
void *handle;
snd_timer_general_info_t ginfo;
snd_timer_select_t sel;
snd_timer_info_t info;
snd_timer_params_t params;
+ idx = 1;
+ while (idx < argc) {
+ if (!strncmp(argv[idx], "timer=", 6)) {
+ timer = atoi(argv[idx]+6);
+ } else if (!strcmp(argv[idx], "slave")) {
+ slave = 1;
+ } else if (!strncmp(argv[idx], "slave_type=", 11)) {
+ slave_type = atoi(argv[idx]+11);
+ } else if (!strncmp(argv[idx], "slave_id=", 9)) {
+ slave_id = atoi(argv[idx]+9);
+ }
+ idx++;
+ }
+ if (slave && slave_type == SND_TIMER_STYPE_NONE) {
+ fprintf(stderr, "sync_type is not set\n");
+ exit(0);
+ }
if ((err = snd_timer_open(&handle))<0) {
fprintf(stderr, "timer open %i (%s)\n", err, snd_strerror(err));
exit(0);
exit(0);
}
printf("Global timers = %i\n", ginfo.count);
+ printf("Using timer %i, slave %i, slave_type %i, slave_id %i\n", timer, slave, slave_type, slave_id);
bzero(&sel, sizeof(sel));
- sel.number = SND_TIMER_SYSTEM;
- sel.slave = 0;
+ sel.slave = slave;
+ if (!sel.slave) {
+ sel.data.number = timer;
+ } else {
+ sel.data.slave.type = slave_type;
+ sel.data.slave.id = slave_id;
+ }
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);
+ if (!sel.slave) {
+ 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.data.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);
+ read_loop(handle, 25, sel.slave ? 10000 : 1);
show_status(handle);
snd_timer_close(handle);
}