Waybar/src/modules/cava.cpp

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#include "modules/cava.hpp"
#include <spdlog/spdlog.h>
waybar::modules::Cava::Cava(const std::string& id, const Json::Value& config)
: ALabel(config, "cava", id, "{}", 60, false, false, false) {
// Load waybar module config
char cfgPath[PATH_MAX];
cfgPath[0] = '\0';
if (config_["cava_config"].isString()) {
std::string strPath{config_["cava_config"].asString()};
const std::string fnd{"XDG_CONFIG_HOME"};
const std::string::size_type npos{strPath.find("$" + fnd)};
if (npos != std::string::npos) strPath.replace(npos, fnd.length() + 1, getenv(fnd.c_str()));
strcpy(cfgPath, strPath.data());
}
// Load cava config
error_.length = 0;
if (!load_config(cfgPath, &prm_, false, &error_)) {
spdlog::error("Error loading config. {0}", error_.message);
exit(EXIT_FAILURE);
}
// Override cava parameters by the user config
prm_.inAtty = 0;
prm_.output = cava::output_method::OUTPUT_RAW;
strcpy(prm_.data_format, "ascii");
strcpy(prm_.raw_target, "/dev/stdout");
prm_.ascii_range = config_["format-icons"].size() - 1;
prm_.bar_width = 2;
prm_.bar_spacing = 0;
prm_.bar_height = 32;
prm_.bar_width = 1;
prm_.orientation = cava::ORIENT_TOP;
prm_.xaxis = cava::xaxis_scale::NONE;
prm_.mono_opt = cava::AVERAGE;
prm_.autobars = 0;
prm_.gravity = 0;
prm_.integral = 1;
if (config_["framerate"].isInt()) prm_.framerate = config_["framerate"].asInt();
if (config_["autosens"].isInt()) prm_.autosens = config_["autosens"].asInt();
if (config_["sensitivity"].isInt()) prm_.sens = config_["sensitivity"].asInt();
if (config_["bars"].isInt()) prm_.fixedbars = config_["bars"].asInt();
if (config_["lower_cutoff_freq"].isNumeric())
prm_.lower_cut_off = config_["lower_cutoff_freq"].asLargestInt();
if (config_["higher_cutoff_freq"].isNumeric())
prm_.upper_cut_off = config_["higher_cutoff_freq"].asLargestInt();
if (config_["sleep_timer"].isInt()) prm_.sleep_timer = config_["sleep_timer"].asInt();
if (config_["method"].isString())
prm_.input = cava::input_method_by_name(config_["method"].asString().c_str());
if (config_["source"].isString()) prm_.audio_source = config_["source"].asString().data();
if (config_["sample_rate"].isNumeric()) prm_.fifoSample = config_["sample_rate"].asLargestInt();
if (config_["sample_bits"].isInt()) prm_.fifoSampleBits = config_["sample_bits"].asInt();
if (config_["stereo"].isBool()) prm_.stereo = config_["stereo"].asBool();
if (config_["reverse"].isBool()) prm_.reverse = config_["reverse"].asBool();
if (config_["bar_delimiter"].isInt()) prm_.bar_delim = config_["bar_delimiter"].asInt();
if (config_["monstercat"].isBool()) prm_.monstercat = config_["monstercat"].asBool();
if (config_["waves"].isBool()) prm_.waves = config_["waves"].asBool();
if (config_["noise_reduction"].isDouble())
prm_.noise_reduction = config_["noise_reduction"].asDouble();
if (config_["input_delay"].isInt())
fetch_input_delay_ = std::chrono::seconds(config_["input_delay"].asInt());
// Make cava parameters configuration
plan_ = new cava::cava_plan{};
audio_raw_.height = prm_.ascii_range;
audio_data_.format = -1;
audio_data_.source = new char[1 + strlen(prm_.audio_source)];
audio_data_.source[0] = '\0';
strcpy(audio_data_.source, prm_.audio_source);
audio_data_.rate = 0;
audio_data_.samples_counter = 0;
audio_data_.channels = 2;
audio_data_.IEEE_FLOAT = 0;
audio_data_.input_buffer_size = BUFFER_SIZE * audio_data_.channels;
audio_data_.cava_buffer_size = audio_data_.input_buffer_size * 8;
audio_data_.cava_in = new double[audio_data_.cava_buffer_size]{0.0};
audio_data_.terminate = 0;
audio_data_.suspendFlag = false;
input_source_ = get_input(&audio_data_, &prm_);
if (!input_source_) {
spdlog::error("cava API didn't provide input audio source method");
exit(EXIT_FAILURE);
}
// Calculate delay for Update() thread
frame_time_milsec_ = std::chrono::milliseconds((int)(1e3 / prm_.framerate));
// Init cava plan, audio_raw structure
audio_raw_init(&audio_data_, &audio_raw_, &prm_, plan_);
if (!plan_) spdlog::error("cava plan is not provided");
audio_raw_.previous_frame[0] = -1; // For first Update() call need to rePaint text message
// Read audio source trough cava API. Cava orginizes this process via infinity loop
thread_fetch_input_ = [this] {
thread_fetch_input_.sleep_for(fetch_input_delay_);
input_source_(&audio_data_);
};
thread_ = [this] {
dp.emit();
thread_.sleep_for(frame_time_milsec_);
};
}
waybar::modules::Cava::~Cava() {
thread_fetch_input_.stop();
thread_.stop();
delete plan_;
plan_ = nullptr;
}
void upThreadDelay(std::chrono::milliseconds& delay, std::chrono::seconds& delta) {
if (delta == std::chrono::seconds{0}) {
delta += std::chrono::seconds{1};
delay += delta;
}
}
void downThreadDelay(std::chrono::milliseconds& delay, std::chrono::seconds& delta) {
if (delta > std::chrono::seconds{0}) {
delay -= delta;
delta -= std::chrono::seconds{1};
}
}
auto waybar::modules::Cava::update() -> void {
if (audio_data_.suspendFlag) return;
silence_ = true;
for (int i{0}; i < audio_data_.input_buffer_size; ++i) {
if (audio_data_.cava_in[i]) {
silence_ = false;
sleep_counter_ = 0;
break;
}
}
if (silence_ && prm_.sleep_timer) {
if (sleep_counter_ <=
(int)(std::chrono::milliseconds(prm_.sleep_timer * 1s) / frame_time_milsec_)) {
++sleep_counter_;
silence_ = false;
}
}
if (!silence_) {
downThreadDelay(frame_time_milsec_, suspend_silence_delay_);
// Process: execute cava
pthread_mutex_lock(&audio_data_.lock);
cava::cava_execute(audio_data_.cava_in, audio_data_.samples_counter, audio_raw_.cava_out, plan_);
if (audio_data_.samples_counter > 0) audio_data_.samples_counter = 0;
pthread_mutex_unlock(&audio_data_.lock);
// Do transformation under raw data
audio_raw_fetch(&audio_raw_, &prm_, &rePaint_, plan_);
if (rePaint_ == 1) {
text_.clear();
for (int i{0}; i < audio_raw_.number_of_bars; ++i) {
audio_raw_.previous_frame[i] = audio_raw_.bars[i];
text_.append(
getIcon((audio_raw_.bars[i] > prm_.ascii_range) ? prm_.ascii_range : audio_raw_.bars[i],
"", prm_.ascii_range + 1));
if (prm_.bar_delim != 0) text_.push_back(prm_.bar_delim);
}
label_.set_markup(text_);
ALabel::update();
}
} else
upThreadDelay(frame_time_milsec_, suspend_silence_delay_);
}
auto waybar::modules::Cava::doAction(const std::string& name) -> void {
if ((actionMap_[name])) {
(this->*actionMap_[name])();
} else
spdlog::error("Cava. Unsupported action \"{0}\"", name);
}
// Cava actions
void waybar::modules::Cava::pause_resume() {
pthread_mutex_lock(&audio_data_.lock);
if (audio_data_.suspendFlag) {
audio_data_.suspendFlag = false;
pthread_cond_broadcast(&audio_data_.resumeCond);
downThreadDelay(frame_time_milsec_, suspend_silence_delay_);
} else {
audio_data_.suspendFlag = true;
upThreadDelay(frame_time_milsec_, suspend_silence_delay_);
}
pthread_mutex_unlock(&audio_data_.lock);
}