mirror of
https://gitee.com/openharmony/third_party_alsa-lib
synced 2024-12-11 18:04:01 +00:00
132 lines
3.6 KiB
C
132 lines
3.6 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "../include/asoundlib.h"
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void show_status(void *handle)
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{
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int err;
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snd_timer_status_t status;
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if ((err = snd_timer_status(handle, &status)) < 0) {
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fprintf(stderr, "timer status %i (%s)\n", err, snd_strerror(err));
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return;
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}
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printf("STATUS:\n");
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printf(" resolution = %lu\n", status.resolution);
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printf(" lost = %lu\n", status.lost);
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printf(" overrun = %lu\n", status.overrun);
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printf(" queue = %i\n", status.queue);
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}
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void read_loop(void *handle, int master_ticks, int timeout)
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{
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int err, max;
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fd_set in;
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struct timeval tv;
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snd_timer_read_t tr;
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while (master_ticks-- > 0) {
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FD_ZERO(&in);
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max = snd_timer_file_descriptor(handle);
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FD_SET(max, &in);
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tv.tv_sec = timeout;
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tv.tv_usec = 0;
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if ((err = select(max + 1, &in, NULL, NULL, &tv)) < 0) {
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fprintf(stderr, "select error %i (%s)\n", err, strerror(err));
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exit(0);
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}
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if (err == 0) {
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fprintf(stderr, "timer time out!!\n");
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exit(0);
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}
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while (snd_timer_read(handle, &tr, sizeof(tr)) == sizeof(tr)) {
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printf("TIMER: resolution = %lu, ticks = %lu\n",
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tr.resolution, tr.ticks);
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}
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}
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}
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void main(int argc, char *argv[])
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{
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int idx, err;
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int timer = SND_TIMER_SYSTEM;
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int slave = 0;
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int slave_type = SND_TIMER_STYPE_SEQUENCER, slave_id = 0;
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void *handle;
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snd_timer_general_info_t ginfo;
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snd_timer_select_t sel;
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snd_timer_info_t info;
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snd_timer_params_t params;
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idx = 1;
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while (idx < argc) {
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if (!strncmp(argv[idx], "timer=", 6)) {
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timer = atoi(argv[idx]+6);
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} else if (!strcmp(argv[idx], "slave")) {
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slave = 1;
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} else if (!strncmp(argv[idx], "slave_type=", 11)) {
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slave_type = atoi(argv[idx]+11);
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} else if (!strncmp(argv[idx], "slave_id=", 9)) {
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slave_id = atoi(argv[idx]+9);
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}
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idx++;
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}
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if (slave && slave_type == SND_TIMER_STYPE_NONE) {
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fprintf(stderr, "sync_type is not set\n");
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exit(0);
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}
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if ((err = snd_timer_open(&handle))<0) {
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fprintf(stderr, "timer open %i (%s)\n", err, snd_strerror(err));
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exit(0);
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}
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if (snd_timer_general_info(handle, &ginfo)<0) {
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fprintf(stderr, "timer general info %i (%s)\n", err, snd_strerror(err));
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exit(0);
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}
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printf("Global timers = %i\n", ginfo.count);
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printf("Using timer %i, slave %i, slave_type %i, slave_id %i\n", timer, slave, slave_type, slave_id);
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bzero(&sel, sizeof(sel));
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sel.slave = slave;
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if (!sel.slave) {
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sel.data.number = timer;
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} else {
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sel.data.slave.type = slave_type;
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sel.data.slave.id = slave_id;
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}
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if ((err = snd_timer_select(handle, &sel)) < 0) {
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fprintf(stderr, "timer select %i (%s)\n", err, snd_strerror(err));
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exit(0);
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}
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if (!sel.slave) {
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if ((err = snd_timer_info(handle, &info)) < 0) {
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fprintf(stderr, "timer info %i (%s)\n", err, snd_strerror(err));
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exit(0);
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}
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printf("Timer %i info:\n", sel.data.number);
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printf(" flags = 0x%x\n", info.flags);
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printf(" id = '%s'\n", info.id);
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printf(" name = '%s'\n", info.name);
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printf(" max ticks = %lu\n", info.ticks);
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printf(" average resolution = %lu\n", info.resolution);
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bzero(¶ms, sizeof(params));
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params.flags = SND_TIMER_PSFLG_AUTO;
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params.ticks = (1000000000 / info.resolution) / 50; /* 50Hz */
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if (params.ticks < 1)
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params.ticks = 1;
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printf("Using %lu tick(s)\n", params.ticks);
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if ((err = snd_timer_params(handle, ¶ms)) < 0) {
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fprintf(stderr, "timer params %i (%s)\n", err, snd_strerror(err));
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exit(0);
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}
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}
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show_status(handle);
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if ((err = snd_timer_start(handle)) < 0) {
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fprintf(stderr, "timer start %i (%s)\n", err, snd_strerror(err));
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exit(0);
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}
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read_loop(handle, 25, sel.slave ? 10000 : 1);
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show_status(handle);
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snd_timer_close(handle);
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}
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