audio settings menu

src/audio/audio.cpp

@@ -356,6 +356,10 @@ Channel* audio::get_channel(int index) {
     return channels.at(index).get();
 }
 
+Channel* audio::get_channel(const std::string& name) {
+    return get_channel(get_channel_index(name));
+}
+
 std::shared_ptr<Stream> audio::get_associated_stream(speakerid_t id) {
     auto found = streams.find(id);
     if (found != streams.end()) {

src/audio/audio.h

@@ -55,6 +55,16 @@ namespace audio {
         /// @brief Get channel name
         const std::string& getName() const;
 
+        inline void setPaused(bool flag) {
+            if (flag == paused)
+                return;
+            if (flag) {
+                pause();
+            } else {
+                resume();
+            }
+        }
+
         /// @brief Pause all speakers in channel
         void pause();
 
@@ -472,10 +482,15 @@ namespace audio {
     extern int get_channel_index(const std::string& name);
 
     /// @brief Get channel by index. 0 - is master channel
-    /// @param name channel index
+    /// @param index channel index
     /// @return channel or nullptr
     extern Channel* get_channel(int index);
 
+    /// @brief Get channel by name.
+    /// @param name channel name
+    /// @return channel or nullptr
+    extern Channel* get_channel(const std::string& name);
+
     /// @brief Get stream associated with speaker
     /// @param id speaker id
     /// @return stream or nullptr

src/engine.cpp

@@ -114,6 +114,19 @@ void Engine::updateHotkeys() {
     }
 }
 
+inline constexpr float sqr(float x) {
+    return x*x;
+}
+
+static void updateAudio(double delta, const AudioSettings& settings) {
+    audio::get_channel("master")->setVolume(sqr(settings.volumeMaster));
+    audio::get_channel("regular")->setVolume(sqr(settings.volumeRegular));
+    audio::get_channel("ui")->setVolume(sqr(settings.volumeUI));
+    audio::get_channel("ambient")->setVolume(sqr(settings.volumeAmbient));
+    audio::get_channel("music")->setVolume(sqr(settings.volumeMusic));
+    audio::update(delta);
+}
+
 void Engine::mainloop() {
     setScreen(std::make_shared<MenuScreen>(this));
 
@@ -125,8 +138,7 @@ void Engine::mainloop() {
         assert(screen != nullptr);
         updateTimers();
         updateHotkeys();
-        
-        audio::update(delta);
+        updateAudio(delta, settings.audio);
 
         gui->act(delta);
         screen->update(delta);

src/frontend/menu/menu_settings.cpp

@@ -11,7 +11,42 @@
 
 using namespace gui;
 
+static void create_volume_trackbar(
+    std::shared_ptr<Panel> panel,
+    const std::wstring& name,
+    float* field
+) {
+    panel->add(menus::create_label([=]() {
+        return langs::get(name, L"settings")+L": " + 
+            std::to_wstring(int(*field*100))+L"%";
+    }));
+
+    auto trackbar = std::make_shared<TrackBar>(0.0, 1.0, 1.0, 0.01, 5);
+    trackbar->setSupplier([=]() {
+        return *field;
+    });
+    trackbar->setConsumer([=](double value) {
+        *field = value; 
+    });
+    panel->add(trackbar);
+}
+
+void create_audio_settings_panel(Engine* engine) {
+    auto menu = engine->getGUI()->getMenu();
+    auto panel = menus::create_page(engine, "settings-audio", 400, 0.0f, 1);
+
+    auto& settings = engine->getSettings().audio;
+    create_volume_trackbar(panel, L"Master Volume", &settings.volumeMaster);
+    create_volume_trackbar(panel, L"Regular Sounds", &settings.volumeRegular);
+    create_volume_trackbar(panel, L"UI Sounds", &settings.volumeUI);
+    create_volume_trackbar(panel, L"Ambient", &settings.volumeAmbient);
+    create_volume_trackbar(panel, L"Music", &settings.volumeMusic);
+    panel->add(guiutil::backButton(menu));
+}
+
 void menus::create_settings_panel(Engine* engine) {
+    create_audio_settings_panel(engine);
+
     auto menu = engine->getGUI()->getMenu();
     auto panel = menus::create_page(engine, "settings", 400, 0.0f, 1);
 
@@ -125,6 +160,7 @@ void menus::create_settings_panel(Engine* engine) {
         util::str2wstr_utf8(langName), 
         "languages", menu));
 
+    panel->add(guiutil::gotoButton(L"Audio", "settings-audio", menu));
     panel->add(guiutil::gotoButton(L"Controls", "controls", menu));
     panel->add(guiutil::backButton(menu));
 }

src/frontend/screens.cpp

@@ -153,6 +153,10 @@ void LevelScreen::update(float delta) {
 
     auto player = controller->getPlayer();
     auto camera = player->camera;
+
+    bool paused = hud->isPause();
+    audio::get_channel("regular")->setPaused(paused);
+    audio::get_channel("ambient")->setPaused(paused);
     audio::set_listener(
         camera->position-camera->dir, 
         player->hitbox->velocity,