statuses/volume_alsa.c

   1 #include <alsa/asoundlib.h>
   2 #include "volume_alsa.h"
   3
   4 int status_volume_alsa(char *cardname, char *mixername, snd_mixer_selem_channel_id_t channel)
   5 {
   6         snd_mixer_t *handle = NULL;
   7         snd_mixer_elem_t *elem;
   8         snd_mixer_selem_id_t *sid;
   9
  10         long min = 0, max = 0;
  11         long volume;
  12         int on_off;
  13
  14
  15         snd_mixer_selem_id_alloca(&sid);
  16
  17         if (snd_mixer_open(&handle, 0) < 0)
  18                 return -1;
  19
  20         if (snd_mixer_attach(handle, cardname) < 0)
  21                 goto ERROR;
  22
  23         snd_mixer_selem_id_set_name(sid, mixername);
  24
  25         if (snd_mixer_selem_register(handle, NULL, NULL) < 0)
  26                 goto ERROR;
  27
  28         if (snd_mixer_load(handle) < 0)
  29                 goto ERROR;
  30
  31         elem = snd_mixer_find_selem(handle, sid);
  32         if (!elem)
  33                 goto ERROR;
  34
  35         if (snd_mixer_selem_has_playback_volume(elem) && snd_mixer_selem_has_playback_channel(elem, channel))
  36         {
  37                 snd_mixer_selem_get_playback_switch(elem, channel, &on_off);
  38                 if (on_off)
  39                         fputs("^fg(#22FF22)", stdout);
  40                 else
  41                         fputs("^fg(red)", stdout);
  42
  43                 snd_mixer_selem_get_playback_volume_range(elem, &min, &max);
  44
  45                 snd_mixer_selem_get_playback_volume(elem, channel, &volume);
  46                 fputs("^ca(1, amixer sset Master toggle)", stdout);
  47                 fputs("^ca(4, amixer sset Master 2+ unmute)", stdout);
  48                 fputs("^ca(5, amixer sset Master 2- unmute)", stdout);
  49                 printf(" Vol: %d ", (int)volume);
  50                 fputs("^ca()", stdout);
  51                 fputs("^ca()", stdout);
  52                 fputs("^ca()", stdout);
  53         }
  54
  55         snd_mixer_close(handle);
  56
  57         return 0;
  58
  59         ERROR:
  60
  61         snd_mixer_close(handle);
  62         return -1;
  63 }