initial commit
This commit is contained in:
407
python_server/server.py
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407
python_server/server.py
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from __future__ import annotations
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import base64
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import datetime
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import io
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import os
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import shutil
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from dataclasses import asdict
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from pathlib import Path
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from typing import Any, Dict, Optional
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import numpy as np
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from fastapi import FastAPI, HTTPException
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from fastapi.responses import Response
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from pydantic import BaseModel, Field
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from PIL import Image, ImageDraw
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from config_loader import load_app_config, get_depth_backend_from_app
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from model.Depth.depth_loader import UnifiedDepthConfig, DepthBackend, build_depth_predictor
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from model.Seg.seg_loader import UnifiedSegConfig, SegBackend, build_seg_predictor
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from model.Inpaint.inpaint_loader import UnifiedInpaintConfig, InpaintBackend, build_inpaint_predictor
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from model.Animation.animation_loader import (
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UnifiedAnimationConfig,
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AnimationBackend,
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build_animation_predictor,
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)
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APP_ROOT = Path(__file__).resolve().parent
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OUTPUT_DIR = APP_ROOT / "outputs"
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OUTPUT_DIR.mkdir(parents=True, exist_ok=True)
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app = FastAPI(title="HFUT Model Server", version="0.1.0")
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class ImageInput(BaseModel):
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image_b64: str = Field(..., description="PNG/JPG 编码后的 base64（不含 data: 前缀）")
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model_name: Optional[str] = Field(None, description="模型 key（来自 /models）")
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class DepthRequest(ImageInput):
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pass
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class SegmentRequest(ImageInput):
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pass
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class InpaintRequest(ImageInput):
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prompt: Optional[str] = Field("", description="补全 prompt")
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strength: float = Field(0.8, ge=0.0, le=1.0)
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negative_prompt: Optional[str] = Field("", description="负向 prompt")
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# 可选 mask（白色区域为重绘）
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mask_b64: Optional[str] = Field(None, description="mask PNG base64（可选）")
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# 推理缩放上限（避免 OOM）
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max_side: int = Field(1024, ge=128, le=2048)
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class AnimateRequest(BaseModel):
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model_name: Optional[str] = Field(None, description="模型 key（来自 /models）")
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prompt: str = Field(..., description="文本提示词")
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negative_prompt: Optional[str] = Field("", description="负向提示词")
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num_inference_steps: int = Field(25, ge=1, le=200)
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guidance_scale: float = Field(8.0, ge=0.0, le=30.0)
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width: int = Field(512, ge=128, le=2048)
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height: int = Field(512, ge=128, le=2048)
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video_length: int = Field(16, ge=1, le=128)
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seed: int = Field(-1, description="-1 表示随机种子")
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def _b64_to_pil_image(b64: str) -> Image.Image:
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raw = base64.b64decode(b64)
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return Image.open(io.BytesIO(raw))
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def _pil_image_to_png_b64(img: Image.Image) -> str:
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buf = io.BytesIO()
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img.save(buf, format="PNG")
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return base64.b64encode(buf.getvalue()).decode("ascii")
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def _depth_to_png16_b64(depth: np.ndarray) -> str:
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depth = np.asarray(depth, dtype=np.float32)
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dmin = float(depth.min())
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dmax = float(depth.max())
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if dmax > dmin:
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norm = (depth - dmin) / (dmax - dmin)
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else:
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norm = np.zeros_like(depth, dtype=np.float32)
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u16 = (norm * 65535.0).clip(0, 65535).astype(np.uint16)
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img = Image.fromarray(u16, mode="I;16")
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return _pil_image_to_png_b64(img)
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def _depth_to_png16_bytes(depth: np.ndarray) -> bytes:
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depth = np.asarray(depth, dtype=np.float32)
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dmin = float(depth.min())
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dmax = float(depth.max())
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if dmax > dmin:
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norm = (depth - dmin) / (dmax - dmin)
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else:
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norm = np.zeros_like(depth, dtype=np.float32)
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# 前后端约定：最远=255，最近=0（8-bit）
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u8 = ((1.0 - norm) * 255.0).clip(0, 255).astype(np.uint8)
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img = Image.fromarray(u8, mode="L")
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buf = io.BytesIO()
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img.save(buf, format="PNG")
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return buf.getvalue()
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def _default_half_mask(img: Image.Image) -> Image.Image:
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w, h = img.size
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mask = Image.new("L", (w, h), 0)
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draw = ImageDraw.Draw(mask)
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draw.rectangle([w // 2, 0, w, h], fill=255)
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return mask
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# -----------------------------
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# /models（给前端/GUI 使用）
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# -----------------------------
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@app.get("/models")
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def get_models() -> Dict[str, Any]:
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"""
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返回一个兼容 Qt 前端的 schema：
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{
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"models": {
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"depth": { "key": { "name": "..."} ... },
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"segment": { ... },
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"inpaint": { "key": { "name": "...", "params": [...] } ... }
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}
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}
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"""
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return {
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"models": {
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"depth": {
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# 兼容旧配置默认值
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"midas": {"name": "MiDaS (default)"},
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"zoedepth_n": {"name": "ZoeDepth (ZoeD_N)"},
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"zoedepth_k": {"name": "ZoeDepth (ZoeD_K)"},
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"zoedepth_nk": {"name": "ZoeDepth (ZoeD_NK)"},
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"depth_anything_v2_vits": {"name": "Depth Anything V2 (vits)"},
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"depth_anything_v2_vitb": {"name": "Depth Anything V2 (vitb)"},
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"depth_anything_v2_vitl": {"name": "Depth Anything V2 (vitl)"},
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"depth_anything_v2_vitg": {"name": "Depth Anything V2 (vitg)"},
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"dpt_large": {"name": "DPT (large)"},
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"dpt_hybrid": {"name": "DPT (hybrid)"},
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"midas_dpt_beit_large_512": {"name": "MiDaS (dpt_beit_large_512)"},
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"midas_dpt_swin2_large_384": {"name": "MiDaS (dpt_swin2_large_384)"},
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"midas_dpt_swin2_tiny_256": {"name": "MiDaS (dpt_swin2_tiny_256)"},
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"midas_dpt_levit_224": {"name": "MiDaS (dpt_levit_224)"},
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},
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"segment": {
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"sam": {"name": "SAM (vit_h)"},
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# 兼容旧配置默认值
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"mask2former_debug": {"name": "SAM (compat mask2former_debug)"},
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"mask2former": {"name": "Mask2Former (not implemented)"},
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},
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"inpaint": {
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# 兼容旧配置默认值：copy 表示不做补全
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"copy": {"name": "Copy (no-op)", "params": []},
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"sdxl_inpaint": {
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"name": "SDXL Inpaint",
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"params": [
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{"id": "prompt", "label": "提示词", "optional": True},
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],
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},
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"controlnet": {
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"name": "ControlNet Inpaint (canny)",
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"params": [
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{"id": "prompt", "label": "提示词", "optional": True},
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],
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},
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},
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"animation": {
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"animatediff": {
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"name": "AnimateDiff (Text-to-Video)",
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"params": [
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{"id": "prompt", "label": "提示词", "optional": False},
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{"id": "negative_prompt", "label": "负向提示词", "optional": True},
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{"id": "num_inference_steps", "label": "采样步数", "optional": True},
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{"id": "guidance_scale", "label": "CFG Scale", "optional": True},
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{"id": "width", "label": "宽度", "optional": True},
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{"id": "height", "label": "高度", "optional": True},
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{"id": "video_length", "label": "帧数", "optional": True},
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{"id": "seed", "label": "随机种子", "optional": True},
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],
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},
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},
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}
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}
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# -----------------------------
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# Depth
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# -----------------------------
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_depth_predictor = None
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_depth_backend: DepthBackend | None = None
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def _ensure_depth_predictor() -> None:
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global _depth_predictor, _depth_backend
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if _depth_predictor is not None and _depth_backend is not None:
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return
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app_cfg = load_app_config()
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backend_str = get_depth_backend_from_app(app_cfg)
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try:
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backend = DepthBackend(backend_str)
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except Exception as e:
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raise ValueError(f"config.py 中 depth.backend 不合法: {backend_str}") from e
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_depth_predictor, _depth_backend = build_depth_predictor(UnifiedDepthConfig(backend=backend))
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@app.post("/depth")
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def depth(req: DepthRequest):
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"""
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计算深度并直接返回二进制 PNG（16-bit 灰度）。
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约束：
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- 前端不传/不选模型；模型选择写死在后端 config.py
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- 成功：HTTP 200 + Content-Type: image/png
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- 失败：HTTP 500，detail 为错误信息
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"""
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try:
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_ensure_depth_predictor()
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pil = _b64_to_pil_image(req.image_b64).convert("RGB")
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depth_arr = _depth_predictor(pil) # type: ignore[misc]
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png_bytes = _depth_to_png16_bytes(np.asarray(depth_arr))
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return Response(content=png_bytes, media_type="image/png")
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except Exception as e:
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raise HTTPException(status_code=500, detail=str(e))
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# -----------------------------
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# Segment
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# -----------------------------
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_seg_cache: Dict[str, Any] = {}
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def _get_seg_predictor(model_name: str):
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if model_name in _seg_cache:
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return _seg_cache[model_name]
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# 兼容旧默认 key
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if model_name == "mask2former_debug":
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model_name = "sam"
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if model_name == "sam":
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pred, _ = build_seg_predictor(UnifiedSegConfig(backend=SegBackend.SAM))
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_seg_cache[model_name] = pred
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return pred
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if model_name == "mask2former":
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pred, _ = build_seg_predictor(UnifiedSegConfig(backend=SegBackend.MASK2FORMER))
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_seg_cache[model_name] = pred
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return pred
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raise ValueError(f"未知 segment model_name: {model_name}")
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@app.post("/segment")
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def segment(req: SegmentRequest) -> Dict[str, Any]:
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try:
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model_name = req.model_name or "sam"
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pil = _b64_to_pil_image(req.image_b64).convert("RGB")
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rgb = np.array(pil, dtype=np.uint8)
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predictor = _get_seg_predictor(model_name)
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label_map = predictor(rgb).astype(np.int32)
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out_dir = OUTPUT_DIR / "segment"
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out_dir.mkdir(parents=True, exist_ok=True)
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out_path = out_dir / f"{model_name}_label.png"
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# 保存为 8-bit 灰度（若 label 超过 255 会截断；当前 SAM 通常不会太大）
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Image.fromarray(np.clip(label_map, 0, 255).astype(np.uint8), mode="L").save(out_path)
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return {"success": True, "label_path": str(out_path)}
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except Exception as e:
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return {"success": False, "error": str(e)}
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# -----------------------------
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# Inpaint
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# -----------------------------
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_inpaint_cache: Dict[str, Any] = {}
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def _get_inpaint_predictor(model_name: str):
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if model_name in _inpaint_cache:
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return _inpaint_cache[model_name]
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if model_name == "copy":
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def _copy(image: Image.Image, *_args, **_kwargs) -> Image.Image:
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return image.convert("RGB")
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_inpaint_cache[model_name] = _copy
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return _copy
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if model_name == "sdxl_inpaint":
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pred, _ = build_inpaint_predictor(UnifiedInpaintConfig(backend=InpaintBackend.SDXL_INPAINT))
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_inpaint_cache[model_name] = pred
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return pred
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if model_name == "controlnet":
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pred, _ = build_inpaint_predictor(UnifiedInpaintConfig(backend=InpaintBackend.CONTROLNET))
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_inpaint_cache[model_name] = pred
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return pred
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raise ValueError(f"未知 inpaint model_name: {model_name}")
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@app.post("/inpaint")
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def inpaint(req: InpaintRequest) -> Dict[str, Any]:
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try:
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model_name = req.model_name or "sdxl_inpaint"
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pil = _b64_to_pil_image(req.image_b64).convert("RGB")
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if req.mask_b64:
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mask = _b64_to_pil_image(req.mask_b64).convert("L")
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else:
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mask = _default_half_mask(pil)
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predictor = _get_inpaint_predictor(model_name)
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out = predictor(
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pil,
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mask,
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req.prompt or "",
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req.negative_prompt or "",
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strength=req.strength,
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max_side=req.max_side,
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)
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out_dir = OUTPUT_DIR / "inpaint"
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out_dir.mkdir(parents=True, exist_ok=True)
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out_path = out_dir / f"{model_name}_inpaint.png"
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out.save(out_path)
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return {"success": True, "output_path": str(out_path)}
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except Exception as e:
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return {"success": False, "error": str(e)}
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_animation_cache: Dict[str, Any] = {}
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def _get_animation_predictor(model_name: str):
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if model_name in _animation_cache:
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return _animation_cache[model_name]
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if model_name == "animatediff":
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pred, _ = build_animation_predictor(
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UnifiedAnimationConfig(backend=AnimationBackend.ANIMATEDIFF)
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)
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_animation_cache[model_name] = pred
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return pred
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raise ValueError(f"未知 animation model_name: {model_name}")
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@app.post("/animate")
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def animate(req: AnimateRequest) -> Dict[str, Any]:
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try:
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model_name = req.model_name or "animatediff"
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predictor = _get_animation_predictor(model_name)
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result_path = predictor(
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prompt=req.prompt,
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negative_prompt=req.negative_prompt or "",
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num_inference_steps=req.num_inference_steps,
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guidance_scale=req.guidance_scale,
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width=req.width,
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height=req.height,
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video_length=req.video_length,
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seed=req.seed,
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)
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out_dir = OUTPUT_DIR / "animation"
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out_dir.mkdir(parents=True, exist_ok=True)
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ts = datetime.datetime.now().strftime("%Y%m%d_%H%M%S")
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out_path = out_dir / f"{model_name}_{ts}.gif"
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shutil.copy2(result_path, out_path)
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return {"success": True, "output_path": str(out_path)}
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except Exception as e:
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return {"success": False, "error": str(e)}
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@app.get("/health")
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def health() -> Dict[str, str]:
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return {"status": "ok"}
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if __name__ == "__main__":
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import uvicorn
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port = int(os.environ.get("MODEL_SERVER_PORT", "8000"))
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uvicorn.run(app, host="0.0.0.0", port=port)
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