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Added (undocumented) events command

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This commit is contained in:
Jaroslav Kysela 2000-08-12 15:34:17 +00:00
parent 80e0e86510
commit fbb7b7c4e9
1 changed files with 91 additions and 6 deletions
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97
amixer/amixer.c
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@ -27,7 +27,9 @@
#include <math.h>
#include <errno.h>
#include <ansidecl.h>
#include <assert.h>
#include <sys/asoundlib.h>
#include <sys/poll.h>
#include "amixer.h"
#define HELPID_HELP 1000
@ -40,7 +42,7 @@ int quiet = 0;
int debugflag = 0;
int card;
void error(const char *fmt,...)
static void error(const char *fmt,...)
{
va_list va;
@ -71,7 +73,7 @@ static int help(void)
return 0;
}
int info(void)
static int info(void)
{
int err;
snd_ctl_t *handle;
@ -453,7 +455,7 @@ static int controls(int level)
return 0;
}
int show_simple_control(void *handle, snd_mixer_sid_t *sid, const char *space, int level)
static int show_simple_control(void *handle, snd_mixer_sid_t *sid, const char *space, int level)
{
int err, chn;
snd_mixer_simple_control_t scontrol;
@ -515,7 +517,7 @@ int show_simple_control(void *handle, snd_mixer_sid_t *sid, const char *space, i
return 0;
}
int simple_controls(int level)
static int simple_controls(int level)
{
int err, idx;
snd_mixer_t *handle;
@ -682,7 +684,7 @@ static int parse_simple_id(const char *str, snd_mixer_sid_t *sid)
return 0;
}
int cset(int argc, char *argv[], int roflag)
static int cset(int argc, char *argv[], int roflag)
{
int err;
snd_ctl_t *handle;
@ -800,7 +802,7 @@ static int check_channels(char *arg, unsigned int mask, unsigned int *mask_retur
return 0;
}
int sset(int argc, char *argv[], int roflag)
static int sset(int argc, char *argv[], int roflag)
{
int err, idx, chn;
unsigned int channels;
@ -892,6 +894,87 @@ int sset(int argc, char *argv[], int roflag)
return 0;
}
static void events_change(snd_ctl_t *handle, snd_hcontrol_t *hcontrol)
{
printf("event change: ");
show_control_id(&hcontrol->id);
printf("\n");
}
static void events_value(snd_ctl_t *handle, snd_hcontrol_t *hcontrol)
{
printf("event value: ");
show_control_id(&hcontrol->id);
printf("\n");
}
static void events_remove(snd_ctl_t *handle, snd_hcontrol_t *hcontrol)
{
printf("event remove: ");
show_control_id(&hcontrol->id);
printf("\n");
}
static void events_rebuild(snd_ctl_t *handle, void *private_data)
{
assert(private_data != (void *)1);
printf("event rebuild\n");
}
static void events_add(snd_ctl_t *handle, void *private_data, snd_hcontrol_t *hcontrol)
{
assert(private_data != (void *)1);
printf("event add: ");
show_control_id(&hcontrol->id);
printf("\n");
hcontrol->event_change = events_change;
hcontrol->event_value = events_value;
hcontrol->event_remove = events_remove;
}
static int events(int argc, char *argv[])
{
snd_ctl_t *handle;
snd_hcontrol_t *hcontrol;
int err;
if ((err = snd_ctl_open(&handle, card)) < 0) {
error("Control %i open error: %s\n", card, snd_strerror(err));
return err;
}
if ((err = snd_ctl_hbuild(handle, NULL)) < 0) {
error("Control %u hbuild error: %s\n", card, snd_strerror(err));
return err;
}
if ((err = snd_ctl_hcallback_rebuild(handle, events_rebuild, (void *)1)) < 0) {
error("Control %u hcallback_rebuild error: %s\n", card, snd_strerror(err));
return err;
}
if ((err = snd_ctl_hcallback_add(handle, events_add, (void *)2)) < 0) {
error("Control %u hcallback_add error: %s\n", card, snd_strerror(err));
return err;
}
for (hcontrol = snd_ctl_hfirst(handle); hcontrol; hcontrol = snd_ctl_hnext(handle, hcontrol)) {
hcontrol->event_change = events_change;
hcontrol->event_value = events_value;
hcontrol->event_remove = events_remove;
}
printf("Ready to listen...\n");
while (1) {
struct pollfd ctl_poll;
int res;
ctl_poll.fd = snd_ctl_file_descriptor(handle);
ctl_poll.events = POLLIN;
ctl_poll.revents = 0;
if (poll(&ctl_poll, 1, -1)) {
res = snd_ctl_hevent(handle);
if (res > 0)
printf("%i events processed\n", res);
}
}
snd_ctl_close(handle);
}
int main(int argc, char *argv[])
{
int morehelp;
@ -969,6 +1052,8 @@ int main(int argc, char *argv[])
return cset(argc - optind - 1, argc - optind > 1 ? argv + optind + 1 : NULL, 0) ? 1 : 0;
} else if (!strcmp(argv[optind], "cget")) {
return cset(argc - optind - 1, argc - optind > 1 ? argv + optind + 1 : NULL, 1) ? 1 : 0;
} else if (!strcmp(argv[optind], "events")) {
return events(argc - optind - 1, argc - optind > 1 ? argv + optind + 1 : NULL);
} else {
fprintf(stderr, "amixer: Unknown command '%s'...\n", argv[optind]);
}