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#include "pulse.h"
#include "../signal.h"
#include <pulse/mainloop.h>
#include <pulse/context.h>
#include <pulse/introspect.h>
#include <pulse/volume.h>
#include <pulse/subscribe.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <tgmath.h>
#define VALUE_SIZE 16
struct pulse {
time_t last_updated;
pa_mainloop * ml;
pa_context * ctx;
char * default_sink;
bool run_loop;
char value[VALUE_SIZE];
};
static void
run_loop(struct pulse * p)
{
p->run_loop = true;
while(p->run_loop && signal_running) {
pa_mainloop_iterate(p->ml, 1, NULL);
}
}
static void
stop_loop(struct pulse * p)
{
p->run_loop = false;
}
static void
server_info_cb(pa_context * ctx, const pa_server_info * info, void * ud)
{
struct pulse * p = (struct pulse *) ud;
size_t s = strlen(info->default_sink_name);
p->default_sink = malloc(s + 1);
memset(p->default_sink, '\0', s + 1);
strncpy(p->default_sink, info->default_sink_name, s);
stop_loop(p);
}
static void
state_cb(pa_context * ctx, void * ud)
{
pa_context_state_t state = pa_context_get_state(ctx);
struct pulse * p = (struct pulse *) ud;
switch(state) {
case PA_CONTEXT_READY:
pa_context_get_server_info(p->ctx, server_info_cb, p);
break;
case PA_CONTEXT_FAILED:
case PA_CONTEXT_TERMINATED:
stop_loop(p);
break;
default: break;
}
}
struct pulse *
pulse_new()
{
struct pulse * p = malloc(sizeof(struct pulse));
memset(p->value, '\0', VALUE_SIZE);
p->last_updated = 0;
p->default_sink = NULL;
p->run_loop = false;
p->ml = pa_mainloop_new();
p->ctx = pa_context_new(pa_mainloop_get_api(p->ml), NULL);
pa_context_set_state_callback(p->ctx, state_cb, p);
pa_context_connect(p->ctx, NULL, PA_CONTEXT_NOAUTOSPAWN, NULL);
run_loop(p);
return p;
}
void
pulse_free(struct pulse * p)
{
if(p->default_sink != NULL) free(p->default_sink);
pa_context_disconnect(p->ctx);
pa_context_unref(p->ctx);
pa_mainloop_free(p->ml);
free(p);
}
static void
sink_info_cb(pa_context * ctx, const pa_sink_info * info, int eol, void * ud)
{
struct pulse * p = (struct pulse *) ud;
pa_volume_t vol, norm;
if(eol > 0) {
stop_loop(p);
}
else {
vol = pa_cvolume_avg(&info->volume);
vol -= PA_VOLUME_MUTED;
norm = PA_VOLUME_NORM - PA_VOLUME_MUTED;
vol = round((100.0f / norm) * vol);
snprintf(
p->value, VALUE_SIZE,
"%s% 4d%%",
info->mute ? "\uf6a9" : "\uf028",
vol);
}
}
void
pulse_update(struct pulse * p)
{
pa_operation * op;
if(p->default_sink != NULL) {
op = pa_context_get_sink_info_by_name(p->ctx, p->default_sink, sink_info_cb, p);
pa_operation_unref(op);
run_loop(p);
}
}
const char *
pulse_get_val(struct pulse * p)
{
return p->value;
}
bool
pulse_should_update(struct pulse * p, time_t now, unsigned short limit)
{
double time_diff = difftime(now, p->last_updated);
if(time_diff >= limit) {
p->last_updated = now;
return true;
}
return false;
}
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