[Lingbot World] Bound image condition storage and extend temporal RoPE (#6838)

Signed-off-by: wtz2333 <2955110911@qq.com>

examples/offline_inference/diffusion/lingbot_world_v2_realtime.py

@@ -1,13 +1,12 @@
 # SPDX-License-Identifier: Apache-2.0
-# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM-Omni project
 """Run LingBot-World 2.0 as an in-process realtime AR-Diffusion session.
 
 This example exercises the internal session API. It is not a public HTTP or
 WebSocket protocol. Each JSONL event advances the world by one three-latent
-frame AR block and writes the latent plus its identity metadata. The current
-scoped implementation supports at most ten ticks per generation epoch because
-its image condition is bounded to 117 pixel frames; reset or create a session
-to start a new world.
+frame AR block and writes the latent plus its identity metadata. Session-owned
+causal VAE encoder state produces each condition block without retaining or
+repeating a full image-condition horizon.
 """
 
 from __future__ import annotations
@@ -24,8 +23,6 @@ from typing import Any
 _MODEL = "robbyant/lingbot-world-v2-14b-causal-fast-diffusers"
 _CAMERA_ACTION_SCHEMA = "lingbot.camera_actions.v1"
 _FRAMES_PER_BLOCK = 3
-# ((117 pixel frames - 1) / VAE temporal factor 4 + 1) / 3 latent frames.
-_MAX_REALTIME_TICKS = 10
 
 
 def _camera_event_data(frames: list[list[str]]) -> dict[str, Any]:
@@ -41,7 +38,7 @@ def parse_args(argv: Sequence[str] | None = None) -> argparse.Namespace:
     parser.add_argument(
         "--events",
         required=True,
-        help="JSONL file with one prompt/action event per AR block; at most 10 events.",
+        help="JSONL file with one prompt/action event per AR block.",
     )
     parser.add_argument("--output-dir", required=True, help="Directory for chunk latents and metadata.")
     parser.add_argument("--session-id", default="lingbot-world", help="Persistent world session identifier.")
@@ -84,12 +81,6 @@ def _load_events(path: Path) -> list[dict[str, Any]]:
         events.append({"event_id": event_id, "prompt": prompt, "frames": frames})
     if not events:
         raise ValueError("events file must contain at least one event.")
-    if len(events) > _MAX_REALTIME_TICKS:
-        raise ValueError(
-            "events file must contain at most "
-            f"{_MAX_REALTIME_TICKS} events because the current LingBot realtime "
-            "image-condition horizon is 117 pixel frames."
-        )
     event_ids = [event["event_id"] for event in events]
     if event_ids != sorted(set(event_ids)):
         raise ValueError("event_id values must be unique and strictly increasing.")