From a20c17de66b417c133883e9b983db6315e532c0a Mon Sep 17 00:00:00 2001
From: Julian T <julian@jtle.dk>
Date: Sat, 31 Oct 2020 16:51:20 +0100
Subject: Added config and patches

Patches:
 -  Pulseaudio volume
 -  Battery warning
---
 components/custom.c | 74 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 74 insertions(+)
 create mode 100644 components/custom.c

(limited to 'components/custom.c')

diff --git a/components/custom.c b/components/custom.c
new file mode 100644
index 0000000..d68f506
--- /dev/null
+++ b/components/custom.c
@@ -0,0 +1,74 @@
+
+#include <alsa/asoundlib.h>
+#include <alsa/mixer.h>
+#include <limits.h>
+
+#include "../util.h"
+
+// https://stackoverflow.com/questions/7657624/get-master-sound-volume-in-c-in-linux
+const char *vol_pulse(void)
+{
+    snd_mixer_t *handle;
+    snd_mixer_elem_t *elem;
+    snd_mixer_selem_id_t *sid;
+
+    static const char *mix_name = "Master";
+    static const char *card = "default";
+    static int mix_index = 0;
+
+    static const char *notfound = "n/a";
+
+    snd_mixer_selem_id_alloca(&sid);
+
+    snd_mixer_selem_id_set_index(sid, mix_index);
+    snd_mixer_selem_id_set_name(sid, mix_name);
+
+    if ((snd_mixer_open(&handle, 0)) < 0) {
+        fprintf(stderr, "could not open mixer\n");
+        return notfound;
+    }
+    if ((snd_mixer_attach(handle, card)) < 0) {
+        snd_mixer_close(handle);
+        fprintf(stderr, "could not open card %s\n", card);
+        return notfound;
+    }
+    if ((snd_mixer_selem_register(handle, NULL, NULL)) < 0) {
+        snd_mixer_close(handle);
+        fprintf(stderr, "could not register selem\n");
+        return notfound;
+    }
+    int ret = snd_mixer_load(handle);
+    if (ret < 0) {
+        snd_mixer_close(handle);
+        fprintf(stderr, "could not load mixer\n");
+        return notfound;
+    }
+    elem = snd_mixer_find_selem(handle, sid);
+    if (!elem) {
+        snd_mixer_close(handle);
+        fprintf(stderr, "could not find selem with index=%d, name=%s\n", mix_index, mix_name);
+        return notfound;
+    }
+
+    long minv, maxv;
+    long outvol;
+    int muted;
+
+    snd_mixer_selem_get_playback_volume_range(elem, &minv, &maxv);
+
+    if(snd_mixer_selem_get_playback_volume(elem, 0, &outvol) < 0) {
+        fprintf(stderr, "could not read output volume\n");
+        snd_mixer_close(handle);
+        return notfound;
+    }
+
+    if(snd_mixer_selem_get_playback_switch(elem, 0, &muted) < 0) {
+        fprintf(stderr, "could not read mute output\n");
+        snd_mixer_close(handle);
+        return notfound;
+    }
+
+    snd_mixer_close(handle);
+
+    return bprintf("%0.0f%s", ((float)outvol / (float)maxv) * 100, muted ? "" : "M");
+}
-- 
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