waybar/src/modules/pulseaudio.cpp

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#include "modules/pulseaudio.hpp"
#include <array>
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waybar::modules::Pulseaudio::Pulseaudio(const std::string &id, const Json::Value &config)
: ALabel(config, "{volume}%"),
mainloop_(nullptr),
mainloop_api_(nullptr),
context_(nullptr),
sink_idx_(0),
volume_(0),
muted_(false),
scrolling_(false) {
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label_.set_name("pulseaudio");
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if (!id.empty()) {
label_.get_style_context()->add_class(id);
}
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mainloop_ = pa_threaded_mainloop_new();
if (mainloop_ == nullptr) {
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throw std::runtime_error("pa_mainloop_new() failed.");
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}
pa_threaded_mainloop_lock(mainloop_);
mainloop_api_ = pa_threaded_mainloop_get_api(mainloop_);
context_ = pa_context_new(mainloop_api_, "waybar");
if (context_ == nullptr) {
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throw std::runtime_error("pa_context_new() failed.");
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}
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if (pa_context_connect(context_, nullptr, PA_CONTEXT_NOAUTOSPAWN, nullptr) < 0) {
auto err =
fmt::format("pa_context_connect() failed: {}", pa_strerror(pa_context_errno(context_)));
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throw std::runtime_error(err);
}
pa_context_set_state_callback(context_, contextStateCb, this);
if (pa_threaded_mainloop_start(mainloop_) < 0) {
throw std::runtime_error("pa_mainloop_run() failed.");
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}
pa_threaded_mainloop_unlock(mainloop_);
// define the pulse scroll events only when no user provided
// events are configured
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if (!config["on-scroll-up"].isString() && !config["on-scroll-down"].isString()) {
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event_box_.add_events(Gdk::SCROLL_MASK | Gdk::SMOOTH_SCROLL_MASK);
event_box_.signal_scroll_event().connect(sigc::mem_fun(*this, &Pulseaudio::handleVolume));
}
}
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waybar::modules::Pulseaudio::~Pulseaudio() {
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mainloop_api_->quit(mainloop_api_, 0);
pa_threaded_mainloop_stop(mainloop_);
pa_threaded_mainloop_free(mainloop_);
}
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void waybar::modules::Pulseaudio::contextStateCb(pa_context *c, void *data) {
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auto pa = static_cast<waybar::modules::Pulseaudio *>(data);
switch (pa_context_get_state(c)) {
case PA_CONTEXT_TERMINATED:
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pa->mainloop_api_->quit(pa->mainloop_api_, 0);
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break;
case PA_CONTEXT_READY:
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pa_context_get_server_info(c, serverInfoCb, data);
pa_context_set_subscribe_callback(c, subscribeCb, data);
pa_context_subscribe(c, PA_SUBSCRIPTION_MASK_SINK, nullptr, nullptr);
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break;
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case PA_CONTEXT_FAILED:
pa->mainloop_api_->quit(pa->mainloop_api_, 1);
break;
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case PA_CONTEXT_CONNECTING:
case PA_CONTEXT_AUTHORIZING:
case PA_CONTEXT_SETTING_NAME:
default:
break;
}
}
bool waybar::modules::Pulseaudio::handleVolume(GdkEventScroll *e) {
// Avoid concurrent scroll event
if (scrolling_) {
return false;
}
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bool direction_up = false;
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double volume_tick = (double)PA_VOLUME_NORM / 100;
pa_volume_t change = volume_tick;
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pa_cvolume pa_volume = pa_volume_;
scrolling_ = true;
if (e->direction == GDK_SCROLL_UP) {
direction_up = true;
}
if (e->direction == GDK_SCROLL_DOWN) {
direction_up = false;
}
if (e->direction == GDK_SCROLL_SMOOTH) {
gdouble delta_x, delta_y;
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gdk_event_get_scroll_deltas(reinterpret_cast<const GdkEvent *>(e), &delta_x, &delta_y);
if (delta_y < 0) {
direction_up = true;
} else if (delta_y > 0) {
direction_up = false;
}
}
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// isDouble returns true for integers as well, just in case
if (config_["scroll-step"].isDouble()) {
change = round(config_["scroll-step"].asDouble() * volume_tick);
}
if (direction_up) {
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if (volume_ + 1 < 100) {
pa_cvolume_inc(&pa_volume, change);
}
} else {
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if (volume_ - 1 >= 0) {
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pa_cvolume_dec(&pa_volume, change);
}
}
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pa_context_set_sink_volume_by_index(context_, sink_idx_, &pa_volume, volumeModifyCb, this);
return true;
}
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/*
* Called when an event we subscribed to occurs.
*/
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void waybar::modules::Pulseaudio::subscribeCb(pa_context * context,
pa_subscription_event_type_t type, uint32_t idx,
void *data) {
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unsigned facility = type & PA_SUBSCRIPTION_EVENT_FACILITY_MASK;
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if (facility == PA_SUBSCRIPTION_EVENT_SINK) {
pa_context_get_sink_info_by_index(context, idx, sinkInfoCb, data);
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}
}
/*
* Called in response to a volume change request
*/
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void waybar::modules::Pulseaudio::volumeModifyCb(pa_context *c, int success, void *data) {
auto pa = static_cast<waybar::modules::Pulseaudio *>(data);
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if (success != 0) {
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pa_context_get_sink_info_by_index(pa->context_, pa->sink_idx_, sinkInfoCb, data);
}
}
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/*
* Called when the requested sink information is ready.
*/
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void waybar::modules::Pulseaudio::sinkInfoCb(pa_context * /*context*/, const pa_sink_info *i,
int /*eol*/, void * data) {
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if (i != nullptr) {
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auto pa = static_cast<waybar::modules::Pulseaudio *>(data);
pa->pa_volume_ = i->volume;
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float volume = static_cast<float>(pa_cvolume_avg(&(pa->pa_volume_))) / float{PA_VOLUME_NORM};
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pa->sink_idx_ = i->index;
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pa->volume_ = std::round(volume * 100.0F);
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pa->muted_ = i->mute != 0;
pa->desc_ = i->description;
pa->monitor_ = i->monitor_source_name;
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pa->port_name_ = i->active_port != nullptr ? i->active_port->name : "Unknown";
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pa->dp.emit();
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}
}
/*
* Called when the requested information on the server is ready. This is
* used to find the default PulseAudio sink.
*/
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void waybar::modules::Pulseaudio::serverInfoCb(pa_context *context, const pa_server_info *i,
void *data) {
pa_context_get_sink_info_by_name(context, i->default_sink_name, sinkInfoCb, data);
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}
static const std::array<std::string, 9> ports = {
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"headphones",
"speaker",
"hdmi",
"headset",
"handsfree",
"portable",
"car",
"hifi",
"phone",
};
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const std::string waybar::modules::Pulseaudio::getPortIcon() const {
std::string nameLC = port_name_;
std::transform(nameLC.begin(), nameLC.end(), nameLC.begin(), ::tolower);
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for (auto const &port : ports) {
if (nameLC.find(port) != std::string::npos) {
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return port;
}
}
return port_name_;
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}
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auto waybar::modules::Pulseaudio::update() -> void {
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auto format = format_;
if (muted_) {
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format = config_["format-muted"].isString() ? config_["format-muted"].asString() : format;
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label_.get_style_context()->add_class("muted");
} else {
label_.get_style_context()->remove_class("muted");
if (monitor_.find("a2dp_sink") != std::string::npos) {
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format =
config_["format-bluetooth"].isString() ? config_["format-bluetooth"].asString() : format;
label_.get_style_context()->add_class("bluetooth");
} else {
label_.get_style_context()->remove_class("bluetooth");
}
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}
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label_.set_markup(fmt::format(
format, fmt::arg("volume", volume_), fmt::arg("icon", getIcon(volume_, getPortIcon()))));
getState(volume_);
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if (tooltipEnabled()) {
label_.set_tooltip_text(desc_);
}
if (scrolling_) {
scrolling_ = false;
}
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}