From 33884c491acaa22edea467a514d7c75263a30bb1 Mon Sep 17 00:00:00 2001
From: Volpeon <git@volpeon.ink>
Date: Fri, 17 Feb 2023 17:57:18 +0100
Subject: Inference script: Better scheduler config

---
 infer.py | 56 +++++++++++++++++++++++++++++++++++++-------------------
 1 file changed, 37 insertions(+), 19 deletions(-)

diff --git a/infer.py b/infer.py
index 80bd208..51cf3a7 100644
--- a/infer.py
+++ b/infer.py
@@ -5,6 +5,7 @@ import sys
 import shlex
 import cmd
 from pathlib import Path
+from typing import Optional
 import torch
 import json
 import traceback
@@ -49,7 +50,8 @@ default_args = {
 
 default_cmds = {
     "project": "",
-    "scheduler": "dpmsm",
+    "scheduler": "unipc",
+    "subscheduler": None,
     "template": "{}",
     "prompt": None,
     "negative_prompt": None,
@@ -126,6 +128,12 @@ def create_cmd_parser():
         type=str,
         choices=["plms", "ddim", "klms", "dpmsm", "dpmss", "euler_a", "kdpm2", "kdpm2_a", "unipc"],
     )
+    parser.add_argument(
+        "--subscheduler",
+        type=str,
+        default=None,
+        choices=["plms", "ddim", "klms", "dpmsm", "dpmss", "euler_a", "kdpm2", "kdpm2_a"],
+    )
     parser.add_argument(
         "--template",
         type=str,
@@ -227,6 +235,33 @@ def load_embeddings(pipeline, embeddings_dir):
     print(f"Added {len(added_tokens)} tokens from embeddings dir: {list(zip(added_tokens, added_ids))}")
 
 
+def create_scheduler(config, scheduler: str, subscheduler: Optional[str] = None):
+    if scheduler == "plms":
+        return PNDMScheduler.from_config(config)
+    elif scheduler == "klms":
+        return LMSDiscreteScheduler.from_config(config)
+    elif scheduler == "ddim":
+        return DDIMScheduler.from_config(config)
+    elif scheduler == "dpmsm":
+        return DPMSolverMultistepScheduler.from_config(config)
+    elif scheduler == "dpmss":
+        return DPMSolverSinglestepScheduler.from_config(config)
+    elif scheduler == "euler_a":
+        return EulerAncestralDiscreteScheduler.from_config(config)
+    elif scheduler == "kdpm2":
+        return KDPM2DiscreteScheduler.from_config(config)
+    elif scheduler == "kdpm2_a":
+        return KDPM2AncestralDiscreteScheduler.from_config(config)
+    elif scheduler == "unipc":
+        if subscheduler is None:
+            return UniPCMultistepScheduler.from_config(config)
+        else:
+            return UniPCMultistepScheduler.from_config(
+                config,
+                solver_p=create_scheduler(config, subscheduler),
+            )
+
+
 def create_pipeline(model, dtype):
     print("Loading Stable Diffusion pipeline...")
 
@@ -295,24 +330,7 @@ def generate(output_dir: Path, pipeline, args):
     else:
         init_image = None
 
-    if args.scheduler == "plms":
-        pipeline.scheduler = PNDMScheduler.from_config(pipeline.scheduler.config)
-    elif args.scheduler == "klms":
-        pipeline.scheduler = LMSDiscreteScheduler.from_config(pipeline.scheduler.config)
-    elif args.scheduler == "ddim":
-        pipeline.scheduler = DDIMScheduler.from_config(pipeline.scheduler.config)
-    elif args.scheduler == "dpmsm":
-        pipeline.scheduler = DPMSolverMultistepScheduler.from_config(pipeline.scheduler.config)
-    elif args.scheduler == "dpmss":
-        pipeline.scheduler = DPMSolverSinglestepScheduler.from_config(pipeline.scheduler.config)
-    elif args.scheduler == "euler_a":
-        pipeline.scheduler = EulerAncestralDiscreteScheduler.from_config(pipeline.scheduler.config)
-    elif args.scheduler == "kdpm2":
-        pipeline.scheduler = KDPM2DiscreteScheduler.from_config(pipeline.scheduler.config)
-    elif args.scheduler == "kdpm2_a":
-        pipeline.scheduler = KDPM2AncestralDiscreteScheduler.from_config(pipeline.scheduler.config)
-    elif args.scheduler == "unipc":
-        pipeline.scheduler = UniPCMultistepScheduler.from_config(pipeline.scheduler.config)
+    pipeline.scheduler = create_scheduler(pipeline.scheduler.config, args.scheduler, args.subscheduler)
 
     for i in range(args.batch_num):
         pipeline.set_progress_bar_config(
-- 
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