app.py

DEVICE = 'cpu'

import gradio as gr
import numpy as np
from sklearn.svm import LinearSVC
from sklearn import preprocessing
import pandas as pd

from diffusers import LCMScheduler
from diffusers.models import ImageProjection
from patch_sdxl import SDEmb
import torch
import spaces

import random
import time

import torch
from urllib.request import urlopen

from PIL import Image
import requests
from io import BytesIO, StringIO

prompt_list = [p for p in list(set(
                pd.read_csv('./twitter_prompts.csv').iloc[:, 1].tolist())) if type(p) == str]

start_time = time.time()

####################### Setup Model
model_id = "stabilityai/stable-diffusion-xl-base-1.0"
lcm_lora_id = "latent-consistency/lcm-lora-sdxl"
pipe = SDEmb.from_pretrained(model_id, variant="fp16")
pipe.load_lora_weights(lcm_lora_id)
pipe.scheduler = LCMScheduler.from_config(pipe.scheduler.config)
pipe.to(device='cuda', dtype=torch.float16)
pipe.load_ip_adapter("h94/IP-Adapter", subfolder="sdxl_models", weight_name="ip-adapter_sdxl.bin")
output_hidden_state = False
#######################

@spaces.GPU
def predict(
        prompt,
        im_emb=None,
    ):
    """Run a single prediction on the model"""
    with torch.no_grad():
        if im_emb == None:
            im_emb = torch.zeros(1, 1280, dtype=torch.float16, device='cuda')
        else:
            im_emb = torch.tensor([float(i) for i in im_emb.split(', ')]).unsqueeze(0).to(dtype=torch.float16).to('cuda')
        image = pipe(
            prompt=prompt,
            ip_adapter_emb=im_emb,
            height=1024,
            width=1024,                                                                                                             
            num_inference_steps=8,
            guidance_scale=0,
            ).images[0]
        im_emb, _ = pipe.encode_image(
                image, 'cuda', 1, output_hidden_state
            )
        return image, im_emb.to(DEVICE)







# TODO add to state instead of shared across all
glob_idx = 0

def next_image(embs, ys, calibrate_prompts):
    global glob_idx
    glob_idx = glob_idx + 1

    # handle case where every instance of calibration prompts is 'Neither' or 'Like' or 'Dislike'
    if len(calibrate_prompts) == 0 and len(list(set(ys))) <= 1:
        embs.append(.01*torch.randn(1, 1280))
        embs.append(.01*torch.randn(1, 1280))
        ys.append(0)
        ys.append(1)
        
    with torch.no_grad():
        if len(calibrate_prompts) > 0:
            print('######### Calibrating with sample prompts #########')
            prompt = calibrate_prompts.pop(0)
            print(prompt)
            image, img_emb = predict(prompt)
            embs.append(img_emb)
            return image, embs, ys, calibrate_prompts
        else:
            print('######### Roaming #########')
            # sample only as many negatives as there are positives
            indices = range(len(ys))
            pos_indices = [i for i in indices if ys[i] == 1]
            neg_indices = [i for i in indices if ys[i] == 0]
            lower = min(len(pos_indices), len(neg_indices))
            neg_indices = random.sample(neg_indices, lower)
            pos_indices = random.sample(pos_indices, lower)

            cut_embs = [embs[i] for i in neg_indices] + [embs[i] for i in pos_indices]
            cut_ys = [ys[i] for i in neg_indices] + [ys[i] for i in pos_indices]

            feature_embs = torch.stack([e[0].detach().cpu() for e in cut_embs])
            scaler = preprocessing.StandardScaler().fit(feature_embs)
            feature_embs = scaler.transform(feature_embs)
            print(np.array(feature_embs).shape, np.array(ys).shape)

            lin_class = LinearSVC(max_iter=50000, dual='auto', class_weight='balanced').fit(np.array(feature_embs), np.array(cut_ys))
            lin_class.coef_ = torch.tensor(lin_class.coef_, dtype=torch.double)
            lin_class.coef_ = (lin_class.coef_.flatten() / (lin_class.coef_.flatten().norm())).unsqueeze(0)


            rng_prompt = random.choice(prompt_list)

            w = 1# if len(embs) % 2 == 0 else 0
            im_emb = w * lin_class.coef_.to(device=DEVICE, dtype=torch.float16)
            prompt= 'an image' if glob_idx % 2 == 0 else rng_prompt
            print(prompt)
            image, im_emb = predict(prompt, img_emb)
            embs.append(im_emb)
            return image, embs, ys, calibrate_prompts









def start(_, embs, ys, calibrate_prompts):
    image, embs, ys, calibrate_prompts = next_image(embs, ys, calibrate_prompts)
    return [
            gr.Button(value='Like', interactive=True), 
            gr.Button(value='Neither', interactive=True), 
            gr.Button(value='Dislike', interactive=True),
            gr.Button(value='Start', interactive=False),
            image,
            embs,
            ys,
            calibrate_prompts
            ]


def choose(choice, embs, ys, calibrate_prompts):
    if choice == 'Like':
        choice = 1
    elif choice == 'Neither':
        _ = embs.pop(-1)
        img, embs, ys, calibrate_prompts = next_image(embs, ys, calibrate_prompts)
        return img, embs, ys, calibrate_prompts
    else:
        choice = 0
    ys.append(choice)
    img, embs, ys, calibrate_prompts = next_image(embs, ys, calibrate_prompts)
    return img, embs, ys, calibrate_prompts

css = "div#output-image {height: 768px !important; width: 768px !important; margin:auto;}"
with gr.Blocks(css=css) as demo:
    embs = gr.State([])
    ys = gr.State([])
    calibrate_prompts = gr.State([
    "4k photo",
    'surrealist art',
    # 'a psychedelic, fractal view',
    'a beautiful collage',
    'abstract art',
    'an eldritch image',
    'a sketch',
    # 'a city full of darkness and graffiti',
    '',
    ])

    with gr.Row(elem_id='output-image'):
        img = gr.Image(interactive=False, elem_id='output-image',)
    with gr.Row(equal_height=True):
        b3 = gr.Button(value='Dislike', interactive=False,)
        b2 = gr.Button(value='Neither', interactive=False,)
        b1 = gr.Button(value='Like', interactive=False,)
        b1.click(
        choose, 
        [b1, embs, ys, calibrate_prompts],
        [img, embs, ys, calibrate_prompts]
        )
        b2.click(
        choose, 
        [b2, embs, ys, calibrate_prompts],
        [img, embs, ys, calibrate_prompts]
        )
        b3.click(
        choose, 
        [b3, embs, ys, calibrate_prompts],
        [img, embs, ys, calibrate_prompts]
        )
    with gr.Row():
        b4 = gr.Button(value='Start')
        b4.click(start,
                 [b4, embs, ys, calibrate_prompts],
                 [b1, b2, b3, b4, img, embs, ys, calibrate_prompts])
    with gr.Row():
        html = gr.HTML('''<div style='text-align:center; font-size:32'>You will calibrate for several prompts and then roam.</ div>''')

demo.launch()  # Share your demo with just 1 extra parameter 🚀