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from typing import Dict, List, Any
import base64
from PIL import Image
from io import BytesIO
from diffusers import StableDiffusionControlNetPipeline, ControlNetModel
#from diffusers import StableDiffusionControlNetPipeline, ControlNetModel, StableDiffusionSafetyChecker
# import Safety Checker
from diffusers.pipelines.stable_diffusion import StableDiffusionSafetyChecker
import torch
import numpy as np
import cv2
import controlnet_hinter
# set device
device = torch.device('cuda' if torch.cuda.is_available() else 'cpu')
if device.type != 'cuda':
raise ValueError("need to run on GPU")
# set mixed precision dtype
dtype = torch.bfloat16 if torch.cuda.get_device_capability()[0] == 8 else torch.float16
# controlnet mapping for controlnet id and control hinter
CONTROLNET_MAPPING = {
"canny_edge": {
"model_id": "lllyasviel/sd-controlnet-canny",
"hinter": controlnet_hinter.hint_canny
},
"pose": {
"model_id": "lllyasviel/sd-controlnet-openpose",
"hinter": controlnet_hinter.hint_openpose
},
"depth": {
"model_id": "lllyasviel/sd-controlnet-depth",
"hinter": controlnet_hinter.hint_depth
},
"scribble": {
"model_id": "lllyasviel/sd-controlnet-scribble",
"hinter": controlnet_hinter.hint_scribble,
},
"segmentation": {
"model_id": "lllyasviel/sd-controlnet-seg",
"hinter": controlnet_hinter.hint_segmentation,
},
"normal": {
"model_id": "lllyasviel/sd-controlnet-normal",
"hinter": controlnet_hinter.hint_normal,
},
"hed": {
"model_id": "lllyasviel/sd-controlnet-hed",
"hinter": controlnet_hinter.hint_hed,
},
"hough": {
"model_id": "lllyasviel/sd-controlnet-mlsd",
"hinter": controlnet_hinter.hint_hough,
}
}
class EndpointHandler():
def __init__(self, path=""):
# define default controlnet id and load controlnet
self.control_type = "depth"
self.controlnet = ControlNetModel.from_pretrained(CONTROLNET_MAPPING[self.control_type]["model_id"],torch_dtype=dtype).to(device)
#processor = AutoProcessor.from_pretrained("CompVis/stable-diffusion-safety-checker")
# Load StableDiffusionControlNetPipeline
#self.stable_diffusion_id = "runwayml/stable-diffusion-v1-5"
self.stable_diffusion_id = "Lykon/dreamshaper-8"
self.pipe = StableDiffusionControlNetPipeline.from_pretrained(self.stable_diffusion_id,
controlnet=self.controlnet,
torch_dtype=dtype,
safety_checker=StableDiffusionSafetyChecker.from_pretrained("CompVis/stable-diffusion-safety-checker", torch_dtype=dtype)).to("cuda")
# Define Generator with seed
self.generator = torch.Generator(device=device.type).manual_seed(3)
def __call__(self, data: Any) -> List[List[Dict[str, float]]]:
"""
:param data: A dictionary contains `inputs` and optional `image` field.
:return: A dictionary with `image` field contains image in base64.
"""
prompt = data.pop("inputs", None)
image = data.pop("image", None)
controlnet_type = data.pop("controlnet_type", None)
# Check if neither prompt nor image is provided
if prompt is None and image is None:
return {"error": "Please provide a prompt and base64 encoded image."}
# Check if a new controlnet is provided
if controlnet_type is not None and controlnet_type != self.control_type:
print(f"changing controlnet from {self.control_type} to {controlnet_type} using {CONTROLNET_MAPPING[controlnet_type]['model_id']} model")
self.control_type = controlnet_type
self.controlnet = ControlNetModel.from_pretrained(CONTROLNET_MAPPING[self.control_type]["model_id"],
torch_dtype=dtype).to(device)
self.pipe.controlnet = self.controlnet
targets = [self.pipe.vae, self.pipe.unet]
for target in targets:
for module in target.modules():
if isinstance(module, torch.nn.Conv2d):
module.padding_mode = "circular"
# hyperparamters
negatice_prompt = data.pop("negative_prompt", None)
num_inference_steps = data.pop("num_inference_steps", 30)
guidance_scale = data.pop("guidance_scale", 7.4)
negative_prompt = data.pop("negative_prompt", None)
height = data.pop("height", None)
width = data.pop("width", None)
controlnet_conditioning_scale = data.pop("controlnet_conditioning_scale", 1.0)
test_var = data.pop("test_var", "DEFAULT")
tiling = data.pop("tiling", True)
print(f"prompt: {prompt}")
print(f"prompt: {test_var}")
# process image
image = self.decode_base64_image(image)
#control_image = CONTROLNET_MAPPING[self.control_type]["hinter"](image)
# run inference pipeline
out = self.pipe(
prompt=prompt,
negative_prompt=negative_prompt,
#image=control_image,
image=image,
num_inference_steps=num_inference_steps,
guidance_scale=guidance_scale,
num_images_per_prompt=1,
height=height,
width=width,
controlnet_conditioning_scale=controlnet_conditioning_scale,
generator=self.generator
)
# return first generate PIL image
return out.images[0]
# helper to decode input image
def decode_base64_image(self, image_string):
base64_image = base64.b64decode(image_string)
buffer = BytesIO(base64_image)
image = Image.open(buffer)
return image
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