""" stream_server.py ================ Streams the core Video-to-ASCII engine to the web via HTTP/WebSocket. Dependencies: pip install fastapi uvicorn websockets Priority Order: 1. --playlist playlist.json → JSON file (per-video vol, mode, path) 2. --folder ./videos → folder scan (filesystem order, not alphabetical) 3. positional video arg → single video (legacy behavior) """ import asyncio import subprocess import json import numpy as np import cv2 from fastapi import FastAPI, WebSocket, WebSocketDisconnect from fastapi.responses import HTMLResponse, StreamingResponse from fastapi.staticfiles import StaticFiles import uvicorn import os from websockets.exceptions import ConnectionClosed # Import the existing engine (ascii_video_player2.py) from ascii_video_player2 import VideoDecoder, AsciiMapper app = FastAPI() # Serve static files (style.css, app.js) from the project directory BASE_DIR = os.path.dirname(os.path.abspath(__file__)) app.mount("/static", StaticFiles(directory=BASE_DIR), name="static") def get_html_content(): html_path = os.path.join(os.path.dirname(__file__), "index.html") with open(html_path, "r", encoding="utf-8") as f: return f.read() def resolve_video_path(video: str) -> str: """ Resolves a video path by checking multiple locations in order: 1. As-is (absolute or relative to CWD) 2. Inside the project root (BASE_DIR) 3. Inside BASE_DIR/videos/ subfolder Returns the first path that exists, or the original string if none found. """ candidates = [ video, os.path.join(BASE_DIR, video), os.path.join(BASE_DIR, "videos", os.path.basename(video)), ] for path in candidates: if os.path.exists(path): return path return video # Return original; error will be caught during playback def load_playlist(playlist_path: str) -> list[dict]: """Loads playlist from a JSON file and resolves all video paths.""" with open(playlist_path, "r", encoding="utf-8") as f: items = json.load(f) for item in items: item["video"] = resolve_video_path(item["video"]) return items def load_folder(folder_path: str, default_mode: int, default_vol: int) -> list[dict]: """ Scans a folder for video files in filesystem order (top to bottom, as they appear in the directory — not alphabetically sorted). """ supported = (".mp4", ".mkv", ".avi", ".mov", ".webm") entries = [] with os.scandir(folder_path) as it: for entry in it: if entry.is_file() and entry.name.lower().endswith(supported): entries.append({ "video": entry.path, "mode": default_mode, "vol": default_vol }) # Filesystem order (no sort applied) return entries def build_queue(args) -> list[dict]: """ Builds the video queue based on argument priority: 1. --playlist JSON file 2. --folder directory 3. Single positional video argument """ if args.playlist: print(f"[PLAYLIST] Loading: {args.playlist}") items = load_playlist(args.playlist) # Fill missing fields with global defaults for item in items: item.setdefault("mode", args.mode) item.setdefault("vol", args.vol) return items if args.folder: print(f"[FOLDER] Scanning: {args.folder}") return load_folder(args.folder, args.mode, args.vol) # Legacy: single video argument return [{"video": resolve_video_path(args.video), "mode": args.mode, "vol": args.vol}] # ── APP STATE ────────────────────────────────────────────── # Queue is stored in app.state so the WebSocket endpoint can read it. # current_index tracks which video is playing. # loop flag controls infinite playback. # ────────────────────────────────────────────────────────── @app.get("/") async def root(): """Serves the Frontend (HTML/JS/CSS) file to the client.""" return HTMLResponse(get_html_content()) @app.get("/audio") async def audio_stream(): """ Extracts and streams audio from the currently active video entry. Server-side volume control via the entry's 'vol' field (0-5 scale). 0 = Muted (FFmpeg never runs) 1 = Normal (1.0x) 5 = Double (2.0x) """ queue = getattr(app.state, "queue", []) idx = getattr(app.state, "current_index", 0) entry = queue[idx] if queue else {} vol_level = entry.get("vol", 1) video_path = entry.get("video", "video.mp4") # vol 0 → skip audio entirely, no FFmpeg process if vol_level <= 0: from fastapi import Response return Response(status_code=204) if not os.path.exists(video_path): from fastapi import HTTPException raise HTTPException(status_code=404, detail="Video file not found") # Map 1-5 → 1.0x-2.0x FFmpeg volume ffmpeg_vol = 1.0 + (vol_level - 1) * 0.25 def audio_generator(): process = subprocess.Popen( [ "ffmpeg", "-i", video_path, "-vn", "-filter:a", f"volume={ffmpeg_vol}", "-acodec", "libmp3lame", "-ab", "128k", "-ar", "44100", "-f", "mp3", "-loglevel", "quiet", "pipe:1" ], stdout=subprocess.PIPE, stderr=subprocess.DEVNULL ) try: while True: chunk = process.stdout.read(4096) if not chunk: break yield chunk finally: process.stdout.close() process.wait() return StreamingResponse( audio_generator(), media_type="audio/mpeg", headers={"Accept-Ranges": "bytes"} ) @app.websocket("/ws") async def websocket_endpoint(websocket: WebSocket): """ Streams ASCII frames for every video in the queue. Advances to the next entry automatically when a video ends. Loops back to the start if --loop is set. """ await websocket.accept() queue = getattr(app.state, "queue", []) loop = getattr(app.state, "loop", False) cols = getattr(app.state, "cols", 200) rows = getattr(app.state, "rows", 80) if not queue: await websocket.send_text("Error: No video in queue!") await websocket.close() return queue_index = 0 # local index; advances through the queue try: while True: entry = queue[queue_index] video_path = entry["video"] render_mode= entry["mode"] # IMPORTANT: Update current_index BEFORE sending INIT so that # when the client reloads /audio in response to INIT, the endpoint # already serves the correct video's audio. app.state.current_index = queue_index print(f"[PLAYING] ({queue_index + 1}/{len(queue)}) {video_path} " f"mode={render_mode} vol={entry['vol']}") try: decoder = VideoDecoder(video_path, cols, rows) except FileNotFoundError: await websocket.send_text(f"Error: '{video_path}' not found!") queue_index += 1 if queue_index >= len(queue): if loop: queue_index = 0 else: break continue mapper = AsciiMapper() fps = decoder.fps frame_t = 1.0 / fps char_byte_lut= np.array([ord(c) for c in mapper._lut], dtype=np.uint8) qb = {5: 0, 4: 2, 3: 3, 2: 5}.get(render_mode, 0) await websocket.send_text(f"INIT:{fps}:{render_mode}:{cols}:{rows}") frame_buf = np.empty((rows, cols, 4), dtype=np.uint8) if render_mode > 1 else None try: for gray_frame, bgr_frame in decoder: t0 = asyncio.get_event_loop().time() indices = np.floor_divide(gray_frame, max(1, 256 // mapper._n)) np.clip(indices, 0, mapper._n - 1, out=indices) if render_mode == 1: char_matrix = mapper._lut[indices] lines = [''.join(row) for row in char_matrix] await websocket.send_text('\n'.join(lines)) else: H, W = gray_frame.shape char_codes = char_byte_lut[indices] rgb = bgr_frame[:, :, ::-1] if qb > 0: rgb = (rgb >> qb) << qb frame_buf[:, :, 0] = char_codes frame_buf[:, :, 1:] = rgb await websocket.send_bytes(frame_buf.tobytes()) elapsed = asyncio.get_event_loop().time() - t0 wait = frame_t - elapsed if wait > 0: await asyncio.sleep(wait) finally: decoder.release() # Video finished → advance queue queue_index += 1 if queue_index >= len(queue): if loop: print("[LOOP] Restarting queue from the beginning.") queue_index = 0 else: print("[DONE] All videos finished.") break except (WebSocketDisconnect, ConnectionClosed): print("Client disconnected from the stream.") if __name__ == "__main__": import argparse parser = argparse.ArgumentParser( description="Real-Time ASCII Web Server", formatter_class=argparse.RawTextHelpFormatter ) # ── Source (mutually exclusive priority: playlist > folder > video) ── parser.add_argument( "video", nargs="?", default="video.mp4", help="Single video file to stream (legacy mode)" ) parser.add_argument( "--playlist", metavar="FILE", default=None, help="Path to a playlist JSON file\n" " Format: [{\"video\": \"a.mp4\", \"mode\": 5, \"vol\": 3}, ...]" ) parser.add_argument( "--folder", metavar="DIR", default=None, help="Path to a folder; plays all videos in filesystem order" ) # ── Playback ── parser.add_argument("--loop", action="store_true", default=False, help="Loop the queue infinitely") parser.add_argument("--port", type=int, default=8000, help="Server port (default: 8000)") # ── Global defaults (overridden per-entry in JSON) ── parser.add_argument( "--mode", type=int, choices=[1, 2, 3, 4, 5], default=1, help="Render mode: 1=B&W 2=512c 3=32Kc 4=262Kc 5=16M Ultra" ) parser.add_argument("--cols", type=int, default=200, help="Column count (default: 200)") parser.add_argument("--rows", type=int, default=80, help="Row count (default: 80)") parser.add_argument( "--vol", type=int, default=1, help="Volume 0-5 (0=muted, 1=normal, 5=double) — global default" ) args = parser.parse_args() # Build the queue queue = build_queue(args) if not queue: print("[ERROR] No videos found. Check your --playlist / --folder / video argument.") exit(1) # Save state app.state.queue = queue app.state.current_index = 0 app.state.loop = args.loop app.state.cols = args.cols app.state.rows = args.rows # Summary print(f"\n{'='*50}") print(f" ASCILINE | {len(queue)} video(s) in queue") print(f" Loop : {'ON' if args.loop else 'OFF'}") print(f" Res : {args.cols}x{args.rows}") print(f" Default : mode={args.mode} vol={args.vol}") print(f"{'='*50}") for i, entry in enumerate(queue, 1): print(f" {i:2}. {entry['video']} [mode={entry['mode']} vol={entry['vol']}]") print(f"{'='*50}\n") print(f"Starting server → http://localhost:{args.port}\n") uvicorn.run(app, host="0.0.0.0", port=args.port, ws_ping_interval=None, ws_ping_timeout=None)