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#include <alsa/asoundlib.h>
#include "common.h"
int status_volume_alsa(GlobalData *g,
char *cardname,
char *mixername,
snd_mixer_selem_channel_id_t channel)
{
StatusItem s;
char text[16] = { 0 };
snd_mixer_t *handle = NULL;
snd_mixer_elem_t *elem;
snd_mixer_selem_id_t *sid;
long min = 0, max = 0;
long volume;
int on_off;
statusitem_init(&s);
s.text = text;
snd_mixer_selem_id_alloca(&sid);
if (snd_mixer_open(&handle, 0) < 0) {
return -1;
}
if (snd_mixer_attach(handle, cardname) < 0) {
goto ERROR;
}
snd_mixer_selem_id_set_name(sid, mixername);
if (snd_mixer_selem_register(handle, NULL, NULL) < 0) {
goto ERROR;
}
if (snd_mixer_load(handle) < 0) {
goto ERROR;
}
elem = snd_mixer_find_selem(handle, sid);
if (!elem) {
goto ERROR;
}
if (snd_mixer_selem_has_playback_volume(elem)
&& snd_mixer_selem_has_playback_channel(elem, channel)) {
snd_mixer_selem_get_playback_switch(elem, channel, &on_off);
snd_mixer_selem_get_playback_volume_range(elem, &min, &max);
snd_mixer_selem_get_playback_volume(elem, channel, &volume);
s.color = on_off ? "#22FF22" : "red";
snprintf(text, sizeof(text), "Vol: %d", (int)volume);
}
snd_mixer_close(handle);
line_append_item(g, &s);
return 0;
ERROR:
snd_mixer_close(handle);
return -1;
}
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