Add base audio + asio implementation

src/main.cpp

@@ -5,6 +5,7 @@
 #include "platform/platform.h"
 #include "renderer/renderer.h"
 #include "midi/midi.h"
+#include "audio/audio.h"
 #include "ui/ui_core.h"
 #include "ui/ui_theme.h"
 #include "ui/ui_widgets.h"
@@ -16,6 +17,7 @@
 #include "platform/platform_win32.cpp"
 #include "renderer/renderer_dx12.cpp"
 #include "midi/midi_win32.cpp"
+#include "audio/audio_asio.cpp"
 #include "menus.cpp"
 
 ////////////////////////////////
@@ -49,6 +51,7 @@ struct AppState {
     PlatformWindow *window;
     Renderer       *renderer;
     MidiEngine     *midi;
+    AudioEngine    *audio;
     UI_Context     *ui;
     S32             last_w, last_h;
     B32             show_browser;
@@ -77,6 +80,10 @@ struct AppState {
     S32             settings_theme_sel;
     B32             settings_vsync;
     B32             settings_autosave;
+
+    // Audio device selection
+    S32             audio_device_sel;   // dropdown index: 0 = None, 1+ = device
+    S32             audio_device_prev;  // previous selection for change detection
 };
 
 ////////////////////////////////
@@ -490,6 +497,80 @@ static void settings_window_content(void *user_data) {
 
     ui_checkbox("SettingsVsync", "V-Sync", &app->settings_vsync);
     ui_checkbox("SettingsAutosave", "Autosave", &app->settings_autosave);
+
+    // Separator
+    CLAY(CLAY_ID("SettingsSep1"),
+        .layout = { .sizing = { .width = CLAY_SIZING_GROW(), .height = CLAY_SIZING_FIXED(1) },
+                     .padding = { 0, 0, 6, 6 } },
+        .backgroundColor = g_theme.border
+    ) {}
+
+    // Audio device dropdown
+    ui_label("SettingsLblAudio", "Audio Device");
+
+    static const char *audio_options[AUDIO_MAX_DEVICES + 1];
+    int32_t audio_count = audio_get_device_count(app->audio);
+    audio_options[0] = "None";
+    for (int32_t i = 0; i < audio_count && i < AUDIO_MAX_DEVICES; i++) {
+        AudioDeviceInfo *dev = audio_get_device(app->audio, i);
+        audio_options[i + 1] = dev ? dev->name : "???";
+    }
+
+    CLAY(CLAY_ID("SettingsAudioWrap"),
+        .layout = { .sizing = { .width = CLAY_SIZING_FIXED(220), .height = CLAY_SIZING_FIT() } }
+    ) {
+        ui_dropdown("SettingsAudio", audio_options, audio_count + 1, &app->audio_device_sel);
+    }
+
+    // Handle device selection change
+    if (app->audio_device_sel != app->audio_device_prev) {
+        audio_close_device(app->audio);
+        if (app->audio_device_sel > 0) {
+            audio_open_device(app->audio, app->audio_device_sel - 1);
+        }
+        app->audio_device_prev = app->audio_device_sel;
+    }
+
+    // Test tone button + status
+    CLAY(CLAY_ID("SettingsAudioBtnRow"),
+        .layout = {
+            .sizing = { .width = CLAY_SIZING_FIT(), .height = CLAY_SIZING_FIT() },
+            .childGap = 8,
+            .childAlignment = { .y = CLAY_ALIGN_Y_CENTER },
+            .layoutDirection = CLAY_LEFT_TO_RIGHT,
+        }
+    ) {
+        bool device_open = (app->audio_device_sel > 0);
+        bool tone_playing = audio_is_test_tone_playing(app->audio);
+
+        if (device_open && !tone_playing) {
+            if (ui_button("BtnTestTone", "Play Test Tone")) {
+                audio_play_test_tone(app->audio);
+            }
+        } else {
+            // Disabled button appearance
+            Clay_ElementId btn_eid = CLAY_ID("BtnTestToneDisabled");
+            CLAY(btn_eid,
+                .layout = {
+                    .sizing = { .width = CLAY_SIZING_FIT(), .height = CLAY_SIZING_FIXED(28) },
+                    .padding = { 12, 12, 0, 0 },
+                    .childAlignment = { .y = CLAY_ALIGN_Y_CENTER },
+                },
+                .backgroundColor = Clay_Color{50, 50, 50, 255},
+                .cornerRadius = CLAY_CORNER_RADIUS(3)
+            ) {
+                static Clay_TextElementConfig disabled_text = {};
+                disabled_text.textColor = Clay_Color{100, 100, 100, 255};
+                disabled_text.fontSize = 15;
+                disabled_text.wrapMode = CLAY_TEXT_WRAP_NONE;
+                CLAY_TEXT(CLAY_STRING("Play Test Tone"), &disabled_text);
+            }
+        }
+
+        if (tone_playing) {
+            ui_label("SettingsLblPlaying", "Playing...");
+        }
+    }
 }
 
 static void about_window_content(void *user_data) {
@@ -580,8 +661,9 @@ static void do_frame(AppState *app) {
     if (!renderer_begin_frame(app->renderer))
         return;
 
-    // Update MIDI activity timers
+    // Update subsystems
     midi_update(app->midi, dt);
+    audio_update(app->audio, dt);
 
     // Gather input
     PlatformInput input = platform_get_input(app->window);
@@ -630,6 +712,7 @@ int main(int argc, char **argv) {
     }
 
     MidiEngine *midi = midi_create();
+    AudioEngine *audio = audio_create(platform_get_native_handle(window));
 
     // Initialize UI (Clay)
     ui_init_theme();
@@ -644,6 +727,7 @@ int main(int argc, char **argv) {
     app.window            = window;
     app.renderer          = renderer;
     app.midi              = midi;
+    app.audio             = audio;
     app.ui                = ui;
     app.last_w            = w;
     app.last_h            = h;
@@ -675,6 +759,7 @@ int main(int argc, char **argv) {
     }
 
 exit_app:
+    audio_destroy(audio);
     midi_destroy(midi);
     ui_destroy(ui);
     renderer_destroy(renderer);