[Diffusion] DreamZero world model integration with CFG parallel + OpenPI serving (#2162)

Signed-off-by: Meng <meng_chen99@163.com>
Signed-off-by: Yangshen Deng <yangshen.d@outlook.com>
Signed-off-by: Suli Wang <50828270+wsl2000@users.noreply.github.com>
Co-authored-by: Meng <meng_chen99@163.com>
Co-authored-by: Suli Wang <50828270+wsl2000@users.noreply.github.com>
Co-authored-by: amy-why-3459 <wuhaiyan17@huawei.com>

vllm_omni/diffusion/models/dreamzero/utils.py

@@ -0,0 +1,29 @@
+# SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
+
+"""DreamZero model constants shared by the pipeline."""
+
+DEFAULT_NUM_INFERENCE_STEPS = 16
+DEFAULT_CFG_SCALE = 5.0
+DEFAULT_SIGMA_SHIFT = 5.0
+DEFAULT_SEED = 1140
+
+DEFAULT_NEGATIVE_PROMPT = (
+    "Vibrant colors, overexposed, static, blurry details, text, subtitles, "
+    "style, artwork, painting, image, still, grayscale, dull, worst quality, "
+    "low quality, JPEG artifacts, ugly, mutilated, extra fingers, bad hands, "
+    "bad face, deformed, disfigured, mutated limbs, fused fingers, stagnant "
+    "image, cluttered background, three legs, many people in the background, "
+    "walking backwards."
+)
+
+DEFAULT_EMBODIMENT_NAME_TO_ID = {
+    "oxe_droid": 17,
+    "agibot": 26,
+    "gr1_unified": 24,
+    "xdof": 22,
+    "yam": 32,
+    "mecka_hands": 27,
+    "lapa": 27,
+    "dream": 31,
+}