app.py

import os
import uuid
import gradio as gr
import spaces
from clip_slider_pipeline import CLIPSliderFlux
from diffusers import FluxPipeline, AutoencoderTiny
import torch
import numpy as np
import cv2
from PIL import Image
from diffusers.utils import load_image
from diffusers.utils import export_to_video
import random
from transformers import pipeline

# 번역 모델 로드
translator = pipeline("translation", model="Helsinki-NLP/opus-mt-ko-en")

# 한글 메뉴 이름 dictionary
korean_labels = {
    "Prompt": "프롬프트",
    "1st direction to steer": "첫 번째 방향",
    "2nd direction to steer": "두 번째 방향",
    "Strength": "강도",
    "Generate directions": "방향 생성",
    "Generated Images": "생성된 이미지",
    "From 1st to 2nd direction": "첫 번째에서 두 번째 방향으로",
    "Strip": "이미지 스트립",
    "Looping video": "루프 비디오",
    "Advanced options": "고급 옵션",
    "Num of intermediate images": "중간 이미지 수",
    "Num iterations for clip directions": "클립 방향 반복 횟수",
    "Num inference steps": "추론 단계 수",
    "Guidance scale": "가이던스 스케일",
    "Randomize seed": "시드 무작위화",
    "Seed": "시드"
}

# load pipelines
base_model = "black-forest-labs/FLUX.1-schnell"

taef1 = AutoencoderTiny.from_pretrained("madebyollin/taef1", torch_dtype=torch.bfloat16).to("cuda")
pipe = FluxPipeline.from_pretrained(base_model,
                                    vae=taef1,
                                    torch_dtype=torch.bfloat16)

pipe.transformer.to(memory_format=torch.channels_last)
clip_slider = CLIPSliderFlux(pipe, device=torch.device("cuda"))

MAX_SEED = 2**32-1

def save_images_with_unique_filenames(image_list, save_directory):
    if not os.path.exists(save_directory):
        os.makedirs(save_directory)

    paths = []
    for image in image_list:
        unique_filename = f"{uuid.uuid4()}.png"
        file_path = os.path.join(save_directory, unique_filename)
        
        image.save(file_path)
        paths.append(file_path)
    
    return paths

def convert_to_centered_scale(num):
    if num % 2 == 0:  # even
        start = -(num // 2 - 1)
        end = num // 2
    else:  # odd
        start = -(num // 2)
        end = num // 2 
    return tuple(range(start, end + 1))

def translate_if_korean(text):
    if any('\u3131' <= char <= '\u3163' or '\uac00' <= char <= '\ud7a3' for char in text):
        return translator(text)[0]['translation_text']
    return text

@spaces.GPU(duration=85)
def generate(prompt,
             concept_1,
             concept_2,
             scale,
             randomize_seed=True,
             seed=42,
             recalc_directions=True,
             iterations=200, 
             steps=3, 
             interm_steps=33, 
             guidance_scale=3.5,
             x_concept_1="", x_concept_2="", 
             avg_diff_x=None, 
             total_images=[],
             progress=gr.Progress()
    ):
    # 프롬프트와 컨셉 번역
    prompt = translate_if_korean(prompt)
    concept_1 = translate_if_korean(concept_1)
    concept_2 = translate_if_korean(concept_2)
    
    print(f"Prompt: {prompt}, ← {concept_2}, {concept_1} ➡️ . scale {scale}, interm steps {interm_steps}")
    slider_x = [concept_2, concept_1]
    # check if avg diff for directions need to be re-calculated
    if randomize_seed:
            seed = random.randint(0, MAX_SEED)
        
    if not sorted(slider_x) == sorted([x_concept_1, x_concept_2]) or recalc_directions:
        progress(0, desc="Calculating directions...")
        avg_diff = clip_slider.find_latent_direction(slider_x[0], slider_x[1], num_iterations=iterations)
        x_concept_1, x_concept_2 = slider_x[0], slider_x[1]

    images = []
    high_scale = scale
    low_scale = -1 * scale
    for i in progress.tqdm(range(interm_steps), desc="Generating images"):
        cur_scale = low_scale + (high_scale - low_scale) * i / (interm_steps - 1)
        image = clip_slider.generate(prompt, 
                                     width=768,
                                     height=768,
                                     guidance_scale=guidance_scale, 
                                     scale=cur_scale,  seed=seed, num_inference_steps=steps, avg_diff=avg_diff) 
        images.append(image)
    canvas = Image.new('RGB', (256*interm_steps, 256))
    for i, im in enumerate(images):
        canvas.paste(im.resize((256,256)), (256 * i, 0))

    comma_concepts_x = f"{slider_x[1]}, {slider_x[0]}"

    scale_total = convert_to_centered_scale(interm_steps)
    scale_min = scale_total[0]
    scale_max = scale_total[-1]
    scale_middle = scale_total.index(0)
    post_generation_slider_update = gr.update(label=comma_concepts_x, value=0, minimum=scale_min, maximum=scale_max, interactive=True)
    avg_diff_x = avg_diff.cpu()

    video_path = f"{uuid.uuid4()}.mp4"
    print(video_path)
    return x_concept_1,x_concept_2, avg_diff_x, export_to_video(images, video_path, fps=5), canvas, images, images[scale_middle], post_generation_slider_update, seed

def update_pre_generated_images(slider_value, total_images):
    number_images = len(total_images)
    if(number_images > 0):
        scale_tuple = convert_to_centered_scale(number_images)
        return total_images[scale_tuple.index(slider_value)][0]
    else:
        return None
    
def reset_recalc_directions():
    return True

examples = [["flower in mountain", "spring", "winter", 1.5], ["남자", "아기", "노인", 2.5], ["a tomato", "super fresh", "rotten", 2.5]]

css = """
footer {
    visibility: hidden;
}
"""

with gr.Blocks(theme="Nymbo/Nymbo_Theme", css=css) as demo:
    x_concept_1 = gr.State("")
    x_concept_2 = gr.State("")
    total_images = gr.Gallery(visible=False)

    avg_diff_x = gr.State()

    recalc_directions = gr.State(False)
    
    with gr.Row():
        with gr.Column():
            with gr.Group():
                prompt = gr.Textbox(label=korean_labels["Prompt"], info="설명할 내용을 입력하세요", placeholder="공원에 있는 강아지")
                with gr.Row():
                    concept_1 = gr.Textbox(label=korean_labels["1st direction to steer"], info="시작 상태", placeholder="겨울")
                    concept_2 = gr.Textbox(label=korean_labels["2nd direction to steer"], info="종료 상태", placeholder="여름")
            x = gr.Slider(minimum=0, value=1.75, step=0.1, maximum=4.0, label=korean_labels["Strength"], info="각 방향의 최대 강도 (2.5 이상은 불안정)")
            submit = gr.Button(korean_labels["Generate directions"])
        with gr.Column():
            with gr.Group(elem_id="group"):
                post_generation_image = gr.Image(label=korean_labels["Generated Images"], type="filepath", elem_id="interactive")
                post_generation_slider = gr.Slider(minimum=-10, maximum=10, value=0, step=1, label=korean_labels["From 1st to 2nd direction"])
    with gr.Row():
        with gr.Column(scale=4):
            image_seq = gr.Image(label=korean_labels["Strip"], elem_id="strip", height=80)
        with gr.Column(scale=2, min_width=100):
            output_image = gr.Video(label=korean_labels["Looping video"], elem_id="video", loop=True, autoplay=True)
    with gr.Accordion(label=korean_labels["Advanced options"], open=False):
        interm_steps = gr.Slider(label=korean_labels["Num of intermediate images"], minimum=3, value=7, maximum=65, step=2)
        with gr.Row():
            iterations = gr.Slider(label=korean_labels["Num iterations for clip directions"], minimum=0, value=200, maximum=400, step=1)
            steps = gr.Slider(label=korean_labels["Num inference steps"], minimum=1, value=3, maximum=4, step=1)
        with gr.Row():
            guidance_scale = gr.Slider(
                label=korean_labels["Guidance scale"],
                minimum=0.1,
                maximum=10.0,
                step=0.1,
                value=3.5,
            )
            with gr.Column():
                randomize_seed = gr.Checkbox(True, label=korean_labels["Randomize seed"])
                seed = gr.Slider(minimum=0, maximum=MAX_SEED, step=1, label=korean_labels["Seed"], interactive=True, randomize=True)

    examples_gradio = gr.Examples(
        examples=examples,
        inputs=[prompt, concept_1, concept_2, x],
        fn=generate,
        outputs=[x_concept_1, x_concept_2, avg_diff_x, output_image, image_seq, total_images, post_generation_image, post_generation_slider, seed],
        cache_examples="lazy"
    )

    submit.click(
        fn=generate,
        inputs=[prompt, concept_1, concept_2, x, randomize_seed, seed, recalc_directions, iterations, steps, interm_steps, guidance_scale, x_concept_1, x_concept_2, avg_diff_x, total_images],
        outputs=[x_concept_1, x_concept_2, avg_diff_x, output_image, image_seq, total_images, post_generation_image, post_generation_slider, seed]
    )
    iterations.change(
        fn=reset_recalc_directions,
        outputs=[recalc_directions]
    )
    seed.change(
        fn=reset_recalc_directions,
        outputs=[recalc_directions]
    )
    post_generation_slider.change(
        fn=update_pre_generated_images,
        inputs=[post_generation_slider, total_images],
        outputs=[post_generation_image],
        queue=False,
        show_progress="hidden",
        concurrency_limit=None
    )
        
if __name__ == "__main__":
    demo.launch()