ADOFAIRenderer/Patch/Game/scnGamePatch.cs

using System.IO;
using ADOFAIRenderer.Core;
using ADOFAIRenderer.Util;
using HarmonyLib;
using UnityEngine;

namespace ADOFAIRenderer.Patch.Game;

[HarmonyPatch(typeof(scnGame))]
// ReSharper disable once InconsistentNaming
public static class scnGamePatch
{
    [HarmonyPostfix]
    [HarmonyPatch("Play")]
    public static void ProcessFloors()
    {
        var nonTile = RenderManager.Instance.stage >= RenderStage.Load &&
                      RenderManager.Instance.Configuration.AdvancedConfig.NonTile;

        if (!nonTile) return;
        foreach (var floor in scrLevelMaker.instance.listFloors)
        {
            DisableRenderers(
                floor.floorRenderer.renderer, floor.legacyFloorSpriteRenderer,
                floor.iconsprite, floor.outlineSprite, 
                floor.topGlow, floor.bottomGlow,
                floor.multiplanetLine
            );
                
            if (floor.holdRenderer) DisableRenderer(floor.holdRenderer.m_meshRenderer);
                
            if (floor.dummyPlanets == null) continue;
            foreach (var planet in floor.dummyPlanets)
                DisablePlanetRenderer(planet);
        }

        var players = scrPlayerManager.instance.players;
        if (players == null) return;
            
        foreach (var player in players)
        {
            var planets = player.planetarySystem?.planetList;
            if (planets == null) continue;

            foreach (var planet in planets)
                DisablePlanetRenderer(planet.planetRenderer);
        }
        return;

        void DisablePlanetRenderer(PlanetRenderer planet)
        {
            if (planet.sprite) DisableRenderer(planet.sprite.meshRenderer);
            DisableRenderers(
                planet.coreParticles.GetRenderer(), planet.tailParticles.GetRenderer(), 
                planet.tailParticlesCoop.GetRenderer(), planet.sparks.GetRenderer(), planet.ring, planet.glow, 
                planet.faceSprite, planet.faceDetails, planet.samuraiSprite
            );
        }

        void DisableRenderers(params Renderer?[] renderers)
        {
            foreach (var renderer in renderers) DisableRenderer(renderer);
        }

        void DisableRenderer(Renderer? renderer)
        {
            if (renderer) renderer.enabled = false;
        }
    }
        
    [HarmonyPrefix]
    [HarmonyPatch("UpdateVideo")]
    // ReSharper disable once InconsistentNaming
    public static bool ReplaceVideo(scnGame __instance)
    {
        // Only replace when rendering is active
        if (!RenderManager.IsActive)
        {
            // Remove FFmpeg player if it was attached previously
            var oldPlayer = __instance.videoBG.gameObject.GetComponent<VideoBGPlayer>();
            if (oldPlayer) Object.Destroy(oldPlayer);
            
            // Re-enable native player component
            __instance.videoBG.enabled = true;
            return true; // Execute original
        }

        string text = __instance.levelData.miscSettings.GetString("bgVideo");
        if (string.IsNullOrEmpty(text))
        {
            __instance.videoBG.gameObject.SetActive(false);
            return false; // Skip original
        }

        __instance.videoBG.gameObject.SetActive(true);

        // We can only play external video files via FFmpegNativeDecoder.
        // Internal/Bundle level background videos are built-in VideoClips, so we fall back to native Unity VideoPlayer.
        if (ADOBase.isInternalLevel || ADOBase.isBundleLevel)
        {
            __instance.videoBG.enabled = true;
            return true; // Execute original
        }

        // Custom level video path
        var videoPath = Path.Combine(Path.GetDirectoryName(ADOBase.levelPath) ?? "", text);
        if (!File.Exists(videoPath))
        {
            return true; // Let the original print error
        }

        // Disable native VideoPlayer component (to prevent it from attempting real-time playback and sync errors)
        var targetCamera = __instance.videoBG.targetCamera;
        if (!targetCamera)
        {
            var camGo = GameObject.Find("BGStaticCam");
            if (camGo != null)
            {
                targetCamera = camGo.GetComponent<Camera>();
            }
        }

        __instance.videoBG.enabled = false;

        // Add or retrieve our custom FFmpeg video background player
        if (!__instance.videoBG.gameObject.TryGetComponent<VideoBGPlayer>(out var player))
        {
            player = __instance.videoBG.gameObject.AddComponent<VideoBGPlayer>();
        }

        var isLooping = __instance.levelData.miscSettings.GetBool("loopVideo");
            
        // Initialize player. If targetTexture is null (CameraFarPlane mode), it will build a quad in front of targetCamera.
        player.Init(videoPath, __instance.videoBG.targetTexture, isLooping, targetCamera, __instance.videoBG.gameObject);

        return false; // Skip original UpdateVideo
    }
}