133 lines
4.1 KiB
C++
133 lines
4.1 KiB
C++
#include "modules/pulseaudio.hpp"
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waybar::modules::Pulseaudio::Pulseaudio(const Json::Value& config)
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: ALabel(config), mainloop_(nullptr), mainloop_api_(nullptr),
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context_(nullptr), sink_idx_(0), volume_(0), muted_(false)
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{
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label_.set_name("pulseaudio");
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mainloop_ = pa_threaded_mainloop_new();
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if (mainloop_ == nullptr) {
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throw std::runtime_error("pa_mainloop_new() failed.");
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}
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pa_threaded_mainloop_lock(mainloop_);
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mainloop_api_ = pa_threaded_mainloop_get_api(mainloop_);
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context_ = pa_context_new(mainloop_api_, "waybar");
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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,
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nullptr) < 0) {
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auto err = fmt::format("pa_context_connect() failed: {}",
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pa_strerror(pa_context_errno(context_)));
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throw std::runtime_error(err);
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}
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pa_context_set_state_callback(context_, contextStateCb, this);
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if (pa_threaded_mainloop_start(mainloop_) < 0) {
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throw std::runtime_error("pa_mainloop_run() failed.");
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}
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pa_threaded_mainloop_unlock(mainloop_);
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}
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waybar::modules::Pulseaudio::~Pulseaudio()
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{
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mainloop_api_->quit(mainloop_api_, 0);
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pa_threaded_mainloop_stop(mainloop_);
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pa_threaded_mainloop_free(mainloop_);
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}
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void waybar::modules::Pulseaudio::contextStateCb(pa_context *c, void *data)
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{
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auto pa = static_cast<waybar::modules::Pulseaudio *>(data);
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switch (pa_context_get_state(c)) {
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case PA_CONTEXT_TERMINATED:
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pa->mainloop_api_->quit(pa->mainloop_api_, 0);
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break;
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case PA_CONTEXT_READY:
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pa_context_get_server_info(c, serverInfoCb, data);
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pa_context_set_subscribe_callback(c, subscribeCb, data);
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pa_context_subscribe(c, PA_SUBSCRIPTION_MASK_SINK, nullptr, nullptr);
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break;
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case PA_CONTEXT_CONNECTING:
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case PA_CONTEXT_AUTHORIZING:
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case PA_CONTEXT_SETTING_NAME:
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break;
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case PA_CONTEXT_FAILED:
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default:
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pa->mainloop_api_->quit(pa->mainloop_api_, 1);
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break;
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}
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}
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/*
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* Called when an event we subscribed to occurs.
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*/
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void waybar::modules::Pulseaudio::subscribeCb(pa_context* context,
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pa_subscription_event_type_t type, uint32_t idx, void* data)
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{
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unsigned facility = type & PA_SUBSCRIPTION_EVENT_FACILITY_MASK;
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switch (facility) {
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case PA_SUBSCRIPTION_EVENT_SINK:
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pa_context_get_sink_info_by_index(context, idx, sinkInfoCb, data);
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break;
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default:
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break;
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}
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}
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/*
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* Called when the requested sink information is ready.
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*/
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void waybar::modules::Pulseaudio::sinkInfoCb(pa_context* /*context*/,
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const pa_sink_info* i, int /*eol*/, void* data)
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{
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if (i != nullptr) {
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auto pa = static_cast<waybar::modules::Pulseaudio *>(data);
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float volume = static_cast<float>(pa_cvolume_avg(&(i->volume)))
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/ float{PA_VOLUME_NORM};
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pa->sink_idx_ = i->index;
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pa->volume_ = volume * 100.0f;
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pa->muted_ = i->mute != 0;
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pa->desc_ = i->description;
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pa->dp.emit();
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}
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}
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/*
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* Called when the requested information on the server is ready. This is
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* used to find the default PulseAudio sink.
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*/
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void waybar::modules::Pulseaudio::serverInfoCb(pa_context *context,
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const pa_server_info *i, void *data)
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{
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pa_context_get_sink_info_by_name(context, i->default_sink_name,
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sinkInfoCb, data);
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}
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auto waybar::modules::Pulseaudio::update() -> void
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{
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auto format =
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config_["format"] ? config_["format"].asString() : "{volume}%";
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if (muted_) {
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format =
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config_["format-muted"] ? config_["format-muted"].asString() : format;
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label_.get_style_context()->add_class("muted");
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} else {
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label_.get_style_context()->remove_class("muted");
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}
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label_.set_label(fmt::format(format,
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fmt::arg("volume", volume_),
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fmt::arg("icon", getIcon(volume_))));
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label_.set_tooltip_text(desc_);
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}
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std::string waybar::modules::Pulseaudio::getIcon(uint16_t percentage)
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{
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if (!config_["format-icons"] || !config_["format-icons"].isArray()) {
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return "";
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}
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auto size = config_["format-icons"].size();
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auto idx = std::clamp(percentage / (100 / size), 0U, size - 1);
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return config_["format-icons"][idx].asString();
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}
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