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// vim:ts=4:sw=4:expandtab
#include <time.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <err.h>
#include <yajl/yajl_gen.h>
#include <yajl/yajl_version.h>
#ifdef LINUX
#include <alsa/asoundlib.h>
#include <alloca.h>
#endif
#if defined(__FreeBSD__) || defined(__DragonFly__)
#include <fcntl.h>
#include <unistd.h>
#include <sys/soundcard.h>
#endif
#ifdef __OpenBSD__
#include <fcntl.h>
#include <unistd.h>
#include <soundcard.h>
#endif
#include "i3status.h"
#include "queue.h"
static char *apply_volume_format(const char *fmt, char *outwalk, int ivolume) {
const char *walk = fmt;
for (; *walk != '\0'; walk++) {
if (*walk != '%') {
*(outwalk++) = *walk;
continue;
}
if (BEGINS_WITH(walk + 1, "%")) {
outwalk += sprintf(outwalk, "%%");
walk += strlen("%");
}
if (BEGINS_WITH(walk + 1, "volume")) {
outwalk += sprintf(outwalk, "%d%%", ivolume);
walk += strlen("volume");
}
}
return outwalk;
}
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) {
char *outwalk = buffer;
int pbval = 1;
/* Printing volume works with ALSA and PulseAudio at the moment */
if (output_format == O_I3BAR) {
char *instance;
asprintf(&instance, "%s.%s.%d", device, mixer, mixer_idx);
INSTANCE(instance);
free(instance);
}
/* Try PulseAudio first */
/* If the device name has the format "pulse[:N]" where N is the
* index of the PulseAudio sink then force PulseAudio, optionally
* overriding the default sink */
if (!strncasecmp(device, "pulse", strlen("pulse"))) {
uint32_t sink_idx = device[5] == ':' ? (uint32_t)atoi(device + 6)
: DEFAULT_SINK_INDEX;
int ivolume = pulse_initialize() ? volume_pulseaudio(sink_idx) : 0;
/* negative result means error, stick to 0 */
if (ivolume < 0)
ivolume = 0;
outwalk = apply_volume_format(fmt, outwalk, ivolume);
goto out;
} else if (!strcasecmp(device, "default") && pulse_initialize()) {
/* no device specified or "default" set */
int ivolume = volume_pulseaudio(DEFAULT_SINK_INDEX);
if (ivolume >= 0) {
outwalk = apply_volume_format(fmt, outwalk, ivolume);
goto out;
}
/* negative result means error, fail PulseAudio attempt */
}
/* If some other device was specified or PulseAudio is not detected,
* proceed to ALSA / OSS */
#ifdef LINUX
int err;
snd_mixer_t *m;
snd_mixer_selem_id_t *sid;
snd_mixer_elem_t *elem;
long min, max, val;
int avg;
if ((err = snd_mixer_open(&m, 0)) < 0) {
fprintf(stderr, "i3status: ALSA: Cannot open mixer: %s\n", snd_strerror(err));
goto out;
}
/* Attach this mixer handle to the given device */
if ((err = snd_mixer_attach(m, device)) < 0) {
fprintf(stderr, "i3status: ALSA: Cannot attach mixer to device: %s\n", snd_strerror(err));
snd_mixer_close(m);
goto out;
}
/* Register this mixer */
if ((err = snd_mixer_selem_register(m, NULL, NULL)) < 0) {
fprintf(stderr, "i3status: ALSA: snd_mixer_selem_register: %s\n", snd_strerror(err));
snd_mixer_close(m);
goto out;
}
if ((err = snd_mixer_load(m)) < 0) {
fprintf(stderr, "i3status: ALSA: snd_mixer_load: %s\n", snd_strerror(err));
snd_mixer_close(m);
goto out;
}
snd_mixer_selem_id_malloc(&sid);
if (sid == NULL) {
snd_mixer_close(m);
goto out;
}
/* Find the given mixer */
snd_mixer_selem_id_set_index(sid, mixer_idx);
snd_mixer_selem_id_set_name(sid, mixer);
if (!(elem = snd_mixer_find_selem(m, sid))) {
fprintf(stderr, "i3status: ALSA: Cannot find mixer %s (index %i)\n",
snd_mixer_selem_id_get_name(sid), snd_mixer_selem_id_get_index(sid));
snd_mixer_close(m);
snd_mixer_selem_id_free(sid);
goto out;
}
/* Get the volume range to convert the volume later */
snd_mixer_selem_get_playback_volume_range(elem, &min, &max);
snd_mixer_handle_events(m);
snd_mixer_selem_get_playback_volume(elem, 0, &val);
if (max != 100) {
float avgf = ((float)val / max) * 100;
avg = (int)avgf;
avg = (avgf - avg < 0.5 ? avg : (avg + 1));
} else
avg = (int)val;
/* 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;
}
}
snd_mixer_close(m);
snd_mixer_selem_id_free(sid);
outwalk = apply_volume_format(fmt, outwalk, avg);
#endif
#if defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__DragonFly__)
char *mixerpath;
char defaultmixer[] = "/dev/mixer";
int mixfd, vol, devmask = 0;
pbval = 1;
if (mixer_idx > 0)
asprintf(&mixerpath, "/dev/mixer%d", mixer_idx);
else
mixerpath = defaultmixer;
if ((mixfd = open(mixerpath, O_RDWR)) < 0) {
warn("OSS: Cannot open mixer");
goto out;
}
if (mixer_idx > 0)
free(mixerpath);
if (ioctl(mixfd, SOUND_MIXER_READ_DEVMASK, &devmask) == -1) {
warn("OSS: Cannot read mixer information");
goto out;
}
if (ioctl(mixfd, MIXER_READ(0), &vol) == -1) {
warn("OSS: Cannot read mixer information");
goto out;
}
if (((vol & 0x7f) == 0) && (((vol >> 8) & 0x7f) == 0)) {
START_COLOR("color_degraded");
pbval = 0;
}
outwalk = apply_volume_format(fmt, outwalk, vol & 0x7f);
close(mixfd);
#endif
out:
*outwalk = '\0';
if (!pbval)
END_COLOR;
OUTPUT_FULL_TEXT(buffer);
}
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