From 7246dc4381c6c95454672a5c1aff65a02d6d3747 Mon Sep 17 00:00:00 2001 From: Laslo Hunhold Date: Sun, 24 Sep 2017 15:33:01 +0200 Subject: Move components into dedicated subdirectory This brings us a lot more tidiness. --- components/volume.c | 43 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 43 insertions(+) create mode 100644 components/volume.c (limited to 'components/volume.c') diff --git a/components/volume.c b/components/volume.c new file mode 100644 index 0000000..f5aa18d --- /dev/null +++ b/components/volume.c @@ -0,0 +1,43 @@ +/* See LICENSE file for copyright and license details. */ +#include +#include +#include +#include +#include +#include +#include + +#include "../util.h" + +const char * +vol_perc(const char *card) +{ + unsigned int i; + int v, afd, devmask; + char *vnames[] = SOUND_DEVICE_NAMES; + + afd = open(card, O_RDONLY | O_NONBLOCK); + if (afd == -1) { + warn("Cannot open %s", card); + return NULL; + } + + if (ioctl(afd, SOUND_MIXER_READ_DEVMASK, &devmask) == -1) { + warn("Cannot get volume for %s", card); + close(afd); + return NULL; + } + for (i = 0; i < LEN(vnames); i++) { + if (devmask & (1 << i) && !strcmp("vol", vnames[i])) { + if (ioctl(afd, MIXER_READ(i), &v) == -1) { + warn("vol_perc: ioctl"); + close(afd); + return NULL; + } + } + } + + close(afd); + + return bprintf("%d", v & 0xff); +} -- cgit v1.2.3