status

Commit: cad1a6904c3178f28a2c938c751897d853facdf0
Parent: 83d1fc8f7c958e1375f57235a5ffcf4b1d800a4e
Author: opask
Date:   Sat, 10 Nov 2018 17:54:48 -0700

add alsa volume support

Diffstat:
M
config.mk
 | 
2
+-
M
status.c
 | 
38
+++++++++++++++++++++++++++++++++++++-

2 files changed, 38 insertions(+), 2 deletions(-)
diff --git a/config.mk b/config.mk
@@ -1,6 +1,6 @@
 PREFIX = /
 
-LIBS = -lmpdclient -lX11
+LIBS = -lmpdclient -lX11 -lasound
 
 CPPFLAGS = -D_POSIX_C_SOURCE
 CFLAGS = -O2 -std=c99 -Wall -pedantic $(CPPFLAGS)
diff --git a/status.c b/status.c
@@ -5,6 +5,8 @@
 #include <string.h>
 #include <time.h>
 #include <unistd.h>
+#include <alsa/asoundlib.h>
+#include <alsa/mixer.h>
 #include <mpd/client.h>
 #include <X11/Xlib.h>
 
@@ -60,6 +62,36 @@ setstatus(char *str)
 	XSync(dpy, False);	
 }
 
+static long
+alsavol(void)
+{
+	snd_mixer_t *handle;
+	snd_mixer_selem_id_t *sid;
+	snd_mixer_elem_t *elem;
+
+	long vol, min, max;
+
+	snd_mixer_open(&handle, 0);
+	snd_mixer_attach(handle, "default");
+	snd_mixer_selem_register(handle, NULL, NULL);
+	snd_mixer_load(handle);
+
+	snd_mixer_selem_id_malloc(&sid);
+	snd_mixer_selem_id_set_index(sid, 0);
+	snd_mixer_selem_id_set_name(sid, "Speaker");
+	elem = snd_mixer_find_selem(handle, sid);
+
+	snd_mixer_selem_get_playback_volume(elem, SND_MIXER_SCHN_MONO, &vol);
+	snd_mixer_selem_get_playback_volume_range(elem, &min, &max);
+
+	/* covert from raw value to percent */
+	vol = (double)vol / (double)(max - min) * 100;
+
+	snd_mixer_close(handle);
+	snd_mixer_selem_id_free(sid);
+	return vol;
+}
+
 static char *
 gettime(const char *fmt)
 {
@@ -111,6 +143,7 @@ main(void)
 	char *time;
 	char *song;
 	char *artist;
+	long vol;
 
 	memset(&sa, 0, sizeof(sa));
 	sa.sa_handler = terminate;
@@ -124,9 +157,12 @@ main(void)
 		time = gettime("%Y年%m月%d日 ♦ %R");
 		song = mpd(MPD_TAG_TITLE);
 		artist = mpd(MPD_TAG_ARTIST);
+		vol = alsavol();
 
-		status = smprintf("[ %s - %s ][ %s ]", song, artist, time);
+		status = smprintf("[ %s - %s ][ %li%% ][ %s ]", artist, song,
+				vol, time);
 		setstatus(status);
+
 		free(time);
 		free(song);
 		free(artist);