From a8a5abae42f6f42056cc27e0cf5313aab080c3a7 Mon Sep 17 00:00:00 2001
From: Volpeon <git@volpeon.ink>
Date: Tue, 27 Sep 2022 22:16:13 +0200
Subject: Various improvements, added inference script

---
 infer.py | 121 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 121 insertions(+)
 create mode 100644 infer.py

(limited to 'infer.py')

diff --git a/infer.py b/infer.py
new file mode 100644
index 0000000..b9e9ff7
--- /dev/null
+++ b/infer.py
@@ -0,0 +1,121 @@
+import argparse
+import datetime
+from pathlib import Path
+from torch import autocast
+from diffusers import StableDiffusionPipeline
+import torch
+import json
+from diffusers import AutoencoderKL, StableDiffusionPipeline, UNet2DConditionModel, PNDMScheduler
+from transformers import CLIPTextModel, CLIPTokenizer, CLIPFeatureExtractor
+from slugify import slugify
+from pipelines.stable_diffusion.no_check import NoCheck
+
+model_id = "path-to-your-trained-model"
+
+prompt = "A photo of sks dog in a bucket"
+
+
+def parse_args():
+    parser = argparse.ArgumentParser(
+        description="Simple example of a training script."
+    )
+    parser.add_argument(
+        "--model",
+        type=str,
+        default=None,
+    )
+    parser.add_argument(
+        "--prompt",
+        type=str,
+        default=None,
+    )
+    parser.add_argument(
+        "--batch_size",
+        type=int,
+        default=1,
+    )
+    parser.add_argument(
+        "--batch_num",
+        type=int,
+        default=50,
+    )
+    parser.add_argument(
+        "--steps",
+        type=int,
+        default=80,
+    )
+    parser.add_argument(
+        "--scale",
+        type=int,
+        default=7.5,
+    )
+    parser.add_argument(
+        "--seed",
+        type=int,
+        default=None,
+    )
+    parser.add_argument(
+        "--output_dir",
+        type=str,
+        default="inference",
+    )
+    parser.add_argument(
+        "--config",
+        type=str,
+        default=None,
+    )
+
+    args = parser.parse_args()
+    if args.config is not None:
+        with open(args.config, 'rt') as f:
+            args = parser.parse_args(
+                namespace=argparse.Namespace(**json.load(f)["args"]))
+
+    return args
+
+
+def main():
+    args = parse_args()
+
+    seed = args.seed or torch.random.seed()
+    generator = torch.Generator(device="cuda").manual_seed(seed)
+
+    now = datetime.datetime.now().strftime("%Y-%m-%dT%H-%M-%S")
+    output_dir = Path(args.output_dir).joinpath(f"{now}_{seed}_{slugify(args.prompt)[:80]}")
+    output_dir.mkdir(parents=True, exist_ok=True)
+
+    tokenizer = CLIPTokenizer.from_pretrained(args.model + '/tokenizer', torch_dtype=torch.bfloat16)
+    text_encoder = CLIPTextModel.from_pretrained(args.model + '/text_encoder', torch_dtype=torch.bfloat16)
+    vae = AutoencoderKL.from_pretrained(args.model + '/vae', torch_dtype=torch.bfloat16)
+    unet = UNet2DConditionModel.from_pretrained(args.model + '/unet', torch_dtype=torch.bfloat16)
+    feature_extractor = CLIPFeatureExtractor.from_pretrained("openai/clip-vit-base-patch32", torch_dtype=torch.bfloat16)
+
+    pipeline = StableDiffusionPipeline(
+        text_encoder=text_encoder,
+        vae=vae,
+        unet=unet,
+        tokenizer=tokenizer,
+        scheduler=PNDMScheduler(
+            beta_start=0.00085, beta_end=0.012, beta_schedule="scaled_linear", skip_prk_steps=True
+        ),
+        safety_checker=NoCheck(),
+        feature_extractor=feature_extractor
+    )
+    pipeline.enable_attention_slicing()
+    pipeline.to("cuda")
+
+    with autocast("cuda"):
+        for i in range(args.batch_num):
+            images = pipeline(
+                [args.prompt] * args.batch_size,
+                num_inference_steps=args.steps,
+                guidance_scale=args.scale,
+                generator=generator,
+            ).images
+
+            for j, image in enumerate(images):
+                image.save(output_dir.joinpath(f"{i * args.batch_size + j}.jpg"))
+
+
+if __name__ == "__main__":
+    main()
-- 
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