waybar/src/modules/jack.cpp

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#include "modules/jack.hpp"
waybar::modules::JACK::JACK(const std::string& id, const Json::Value& config)
: ALabel(config, "jack", id, "{load}%", 1) {
xruns_ = 0;
state_ = "disconnected";
client_ = NULL;
state_ = JACKState();
thread_ = [this] {
dp.emit();
thread_.sleep_for(interval_);
};
}
std::string waybar::modules::JACK::JACKState() {
if(state_.compare("xrun") == 0)
return "xrun";
if(state_.compare("connected") == 0)
return "connected";
std::string procname;
bool foundJACK = false;
proc_t** proctab = readproctab(PROC_FILLSTAT);
for(int i=0; proctab[i]; i++) {
procname = proctab[i]->cmd;
if(!procname.compare("jackd") || !procname.compare("pipewire"))
foundJACK = true;
freeproc(proctab[i]);
}
free(proctab);
if(!foundJACK)
return "disconnected";
client_ = jack_client_open("waybar", JackNoStartServer, NULL);
if (client_) {
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jack_thread_ = jack_client_thread_id(client_);
if(config_["realtime"].isBool() && !config_["realtime"].asBool())
jack_drop_real_time_scheduling(jack_thread_);
bufsize_ = jack_get_buffer_size(client_);
samplerate_ = jack_get_sample_rate(client_);
jack_set_buffer_size_callback(client_, bufSizeCallback, this);
jack_set_xrun_callback(client_, xrunCallback, this);
jack_on_shutdown(client_, shutdownCallback, this);
if (!jack_activate(client_))
return "connected";
}
return "disconnected";
}
auto waybar::modules::JACK::update() -> void {
std::string format;
float latency = 1000 * (float)bufsize_ / (float)samplerate_;
auto state = JACKState();
float load;
if(label_.get_style_context()->has_class("xrun")) {
label_.get_style_context()->remove_class("xrun");
state = "connected";
}
if(state.compare("disconnected") != 0)
load = jack_cpu_load(client_);
else {
load = 0;
bufsize_ = 0;
samplerate_ = 0;
latency = 0;
}
if(label_.get_style_context()->has_class(state_))
label_.get_style_context()->remove_class(state_);
if (config_["format-" + state].isString()) {
format = config_["format-" + state].asString();
} else if (config_["format"].isString()) {
format = config_["format"].asString();
} else format = "DSP {load}%";
if(!label_.get_style_context()->has_class(state))
label_.get_style_context()->add_class(state);
state_ = state;
label_.set_markup(fmt::format(format, fmt::arg("load", std::round(load)),
fmt::arg("bufsize", bufsize_),
fmt::arg("samplerate", samplerate_),
fmt::arg("latency", fmt::format("{:.2f}", latency)),
fmt::arg("xruns", xruns_)));
if (tooltipEnabled()) {
std::string tooltip_format = "{bufsize}/{samplerate} {latency}ms";
if (config_["tooltip-format"].isString())
tooltip_format = config_["tooltip-format"].asString();
label_.set_tooltip_text(fmt::format(tooltip_format, fmt::arg("load", std::round(load)),
fmt::arg("bufsize", bufsize_),
fmt::arg("samplerate", samplerate_),
fmt::arg("latency", fmt::format("{:.2f}", latency)),
fmt::arg("xruns", xruns_)));
}
// Call parent update
ALabel::update();
}
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int bufSizeCallback(unsigned int size, void *obj) {
waybar::modules::JACK* x = (waybar::modules::JACK*)obj;
x->bufsize_ = size;
return size;
}
int xrunCallback(void *obj) {
waybar::modules::JACK* x = (waybar::modules::JACK*)obj;
x->xruns_ += 1;
x->state_ = "xrun";
return 0;
}
void shutdownCallback(void *obj) {
waybar::modules::JACK* x = (waybar::modules::JACK*)obj;
pthread_cancel(x->jack_thread_);
x->client_ = NULL;
x->state_ = "disconnected";
x->xruns_ = 0;
}