Add channel switching delay so stream settles before switching

src/app.c

@@ -12,7 +12,8 @@
 #define GUIDE_BROWSE_STEP_MINUTES 30
 #define GUIDE_BROWSE_MAX_AHEAD_MINUTES (12 * 60)
 #define GUIDE_BROWSE_MAX_OFFSET_MINUTES (GUIDE_BROWSE_MAX_AHEAD_MINUTES - ((int) (TIMELINE_VISIBLE_SECONDS / 60.0) - 30))
-#define CHANNEL_BANNER_DURATION_MS 3000
+#define CHANNEL_BANNER_DURATION_MS 5000
+#define CHANNEL_SWITCH_LOCK_DURATION_MS 7000
 
 static void configure_runtime_environment(void) {
     char runtime_dir[64];
@@ -127,11 +128,18 @@ static int update_video_texture(App *app) {
 
 static void tune_relative(App *app, int delta) {
     int next_index;
+    Uint32 now;
 
     if (app->channels.count == 0) {
         return;
     }
 
+    now = SDL_GetTicks();
+    if (now < app->channel_switch_lock_until) {
+        return;
+    }
+    app->channel_switch_lock_until = now + CHANNEL_SWITCH_LOCK_DURATION_MS;
+
     next_index = app->player.current_index;
     if (next_index < 0) {
         next_index = 0;

src/app.h

@@ -25,6 +25,7 @@ typedef struct App {
     int last_blackout_state;
     Uint32 startup_handoff_until;
     Uint32 channel_banner_until;
+    Uint32 channel_switch_lock_until;
     time_t app_start_time;
     Uint64 app_start_ticks;
     int guide_time_offset_minutes;