1 // vim:ts=4:sw=4:expandtab
7 #include <yajl/yajl_gen.h>
8 #include <yajl/yajl_version.h>
11 #include <alsa/asoundlib.h>
15 #if defined(__FreeBSD__) || defined(__DragonFly__)
18 #include <sys/soundcard.h>
24 #include <soundcard.h>
30 static char *apply_volume_format(const char *fmt, char *outwalk, int ivolume) {
31 const char *walk = fmt;
33 for (; *walk != '\0'; walk++) {
38 if (BEGINS_WITH(walk + 1, "%")) {
39 outwalk += sprintf(outwalk, "%%");
42 if (BEGINS_WITH(walk + 1, "volume")) {
43 outwalk += sprintf(outwalk, "%d%%", ivolume);
44 walk += strlen("volume");
50 void print_volume(yajl_gen json_gen, char *buffer, const char *fmt, const char *fmt_muted, const char *device, const char *mixer, int mixer_idx) {
51 char *outwalk = buffer;
54 /* Printing volume only works with ALSA at the moment */
55 if (output_format == O_I3BAR) {
57 asprintf(&instance, "%s.%s.%d", device, mixer, mixer_idx);
64 snd_mixer_selem_id_t *sid;
65 snd_mixer_elem_t *elem;
69 if ((err = snd_mixer_open(&m, 0)) < 0) {
70 fprintf(stderr, "i3status: ALSA: Cannot open mixer: %s\n", snd_strerror(err));
74 /* Attach this mixer handle to the given device */
75 if ((err = snd_mixer_attach(m, device)) < 0) {
76 fprintf(stderr, "i3status: ALSA: Cannot attach mixer to device: %s\n", snd_strerror(err));
81 /* Register this mixer */
82 if ((err = snd_mixer_selem_register(m, NULL, NULL)) < 0) {
83 fprintf(stderr, "i3status: ALSA: snd_mixer_selem_register: %s\n", snd_strerror(err));
88 if ((err = snd_mixer_load(m)) < 0) {
89 fprintf(stderr, "i3status: ALSA: snd_mixer_load: %s\n", snd_strerror(err));
94 snd_mixer_selem_id_malloc(&sid);
100 /* Find the given mixer */
101 snd_mixer_selem_id_set_index(sid, mixer_idx);
102 snd_mixer_selem_id_set_name(sid, mixer);
103 if (!(elem = snd_mixer_find_selem(m, sid))) {
104 fprintf(stderr, "i3status: ALSA: Cannot find mixer %s (index %i)\n",
105 snd_mixer_selem_id_get_name(sid), snd_mixer_selem_id_get_index(sid));
107 snd_mixer_selem_id_free(sid);
111 /* Get the volume range to convert the volume later */
112 snd_mixer_selem_get_playback_volume_range(elem, &min, &max);
114 snd_mixer_handle_events(m);
115 snd_mixer_selem_get_playback_volume(elem, 0, &val);
117 float avgf = ((float)val / max) * 100;
119 avg = (avgf - avg < 0.5 ? avg : (avg + 1));
124 if (snd_mixer_selem_has_playback_switch(elem)) {
125 if ((err = snd_mixer_selem_get_playback_switch(elem, 0, &pbval)) < 0)
126 fprintf(stderr, "i3status: ALSA: playback_switch: %s\n", snd_strerror(err));
128 START_COLOR("color_degraded");
134 snd_mixer_selem_id_free(sid);
136 outwalk = apply_volume_format(fmt, outwalk, avg);
139 #if defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__DragonFly__)
141 char defaultmixer[] = "/dev/mixer";
142 int mixfd, vol, devmask = 0;
146 asprintf(&mixerpath, "/dev/mixer%d", mixer_idx);
148 mixerpath = defaultmixer;
150 if ((mixfd = open(mixerpath, O_RDWR)) < 0) {
151 warn("OSS: Cannot open mixer");
158 if (ioctl(mixfd, SOUND_MIXER_READ_DEVMASK, &devmask) == -1) {
159 warn("OSS: Cannot read mixer information");
162 if (ioctl(mixfd, MIXER_READ(0), &vol) == -1) {
163 warn("OSS: Cannot read mixer information");
167 if (((vol & 0x7f) == 0) && (((vol >> 8) & 0x7f) == 0)) {
168 START_COLOR("color_degraded");
172 outwalk = apply_volume_format(fmt, outwalk, vol & 0x7f);
180 OUTPUT_FULL_TEXT(buffer);