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Fixed ALSA capture device monitoring.

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When using ALSA, the "Capture" mixer doesn't have the playback channel,
instead "capture"-related methods should be used to get information
about the current volume / state of the mixer.
This commit is contained in:
Eugene Dzhurinsky 2018-12-28 12:17:53 -05:00
parent a84ad18fbf
commit 696ddf461f
No known key found for this signature in database
GPG Key ID: 916B8EA98379AD53
1 changed files with 24 additions and 12 deletions
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36
src/print_volume.c
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@ -30,6 +30,23 @@
#include "i3status.h"
#include "queue.h"
#define ALSA_VOLUME(channel) \
err = snd_mixer_selem_get_##channel##_dB_range(elem, &min, &max) || \
snd_mixer_selem_get_##channel##_dB(elem, 0, &val); \
if (err != 0 || min >= max) { \
err = snd_mixer_selem_get_##channel##_volume_range(elem, &min, &max) || \
snd_mixer_selem_get_##channel##_volume(elem, 0, &val); \
force_linear = true; \
}
#define ALSA_MUTE_SWITCH(channel) \
if ((err = snd_mixer_selem_get_##channel##_switch(elem, 0, &pbval)) < 0) \
fprintf(stderr, "i3status: ALSA: " #channel "_switch: %s\n", snd_strerror(err)); \
if (!pbval) { \
START_COLOR("color_degraded"); \
fmt = fmt_muted; \
}
static char *apply_volume_format(const char *fmt, char *outwalk, int ivolume) {
const char *walk = fmt;
@ -165,12 +182,10 @@ void print_volume(yajl_gen json_gen, char *buffer, const char *fmt, const char *
/* Get the volume range to convert the volume later */
snd_mixer_handle_events(m);
err = snd_mixer_selem_get_playback_dB_range(elem, &min, &max) ||
snd_mixer_selem_get_playback_dB(elem, 0, &val);
if (err != 0 || min >= max) {
err = snd_mixer_selem_get_playback_volume_range(elem, &min, &max) ||
snd_mixer_selem_get_playback_volume(elem, 0, &val);
force_linear = true;
if (!strncasecmp(mixer, "capture", strlen("capture"))) {
ALSA_VOLUME(capture)
} else {
ALSA_VOLUME(playback)
}
if (err != 0) {
@ -195,12 +210,9 @@ void print_volume(yajl_gen json_gen, char *buffer, const char *fmt, const char *
/* Check for mute */
if (snd_mixer_selem_has_playback_switch(elem)) {
if ((err = snd_mixer_selem_get_playback_switch(elem, 0, &pbval)) < 0)
fprintf(stderr, "i3status: ALSA: playback_switch: %s\n", snd_strerror(err));
if (!pbval) {
START_COLOR("color_degraded");
fmt = fmt_muted;
}
ALSA_MUTE_SWITCH(playback)
} else if (snd_mixer_selem_has_capture_switch(elem)) {
ALSA_MUTE_SWITCH(capture)
}
snd_mixer_close(m);