openpilot is an open source driver assistance system. openpilot performs the functions of Automated Lane Centering and Adaptive Cruise Control for over 200 supported car makes and models.
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#include "selfdrive/ui/soundd/sound.h"
#include "cereal/messaging/messaging.h"
#include "selfdrive/common/util.h"
// TODO: detect when we can't play sounds
// TODO: detect when we can't display the UI
Sound::Sound(QObject *parent) : sm({"carState", "controlsState"}) {
const QString sound_asset_path = Hardware::TICI() ? "../../assets/sounds_tici/" : "../../assets/sounds/";
for (auto &[alert, fn, loops] : sound_list) {
QSoundEffect *s = new QSoundEffect(this);
QObject::connect(s, &QSoundEffect::statusChanged, [=]() {
assert(s->status() != QSoundEffect::Error);
});
s->setSource(QUrl::fromLocalFile(sound_asset_path + fn));
s->setVolume(Hardware::MIN_VOLUME);
sounds[alert] = {s, loops ? QSoundEffect::Infinite : 0};
}
QTimer *timer = new QTimer(this);
QObject::connect(timer, &QTimer::timeout, this, &Sound::update);
timer->start(1000 / UI_FREQ);
};
void Sound::update() {
sm.update(0);
if (sm.updated("carState")) {
// scale volume with speed
float volume = util::map_val(sm["carState"].getCarState().getVEgo(), 0.f, 20.f,
Hardware::MIN_VOLUME, Hardware::MAX_VOLUME);
for (auto &[s, loops] : sounds) {
s->setVolume(std::round(100 * volume) / 100);
}
}
setAlert(Alert::get(sm, 1));
}
void Sound::setAlert(const Alert &alert) {
if (!current_alert.equal(alert)) {
current_alert = alert;
// stop sounds
for (auto &[s, loops] : sounds) {
// Only stop repeating sounds
if (s->loopsRemaining() == QSoundEffect::Infinite) {
s->stop();
}
}
// play sound
if (alert.sound != AudibleAlert::NONE) {
auto &[s, loops] = sounds[alert.sound];
s->setLoopCount(loops);
s->play();
}
}
}