151 lines
5.2 KiB
Python
151 lines
5.2 KiB
Python
import torch
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from safetensors.torch import load_file
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import logging
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import gc
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import os
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from .utils import get_llm_adapters
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from .llm_to_sdxl_adapter import LLMToSDXLAdapter
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logger = logging.getLogger(__name__)
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class LLMAdapterLoader:
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"""
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ComfyUI node that loads LLM to SDXL adapter
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"""
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def __init__(self):
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self.adapter = None
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self.current_adapter_path = None
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self.device = 'cuda:0' if torch.cuda.is_available() else 'cpu'
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@classmethod
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def INPUT_TYPES(cls):
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return {
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"required": {
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"adapter_path": (get_llm_adapters(), {
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"default": get_llm_adapters()[0] if get_llm_adapters() else "checkpoint_epoch_10.safetensors"
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}),
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},
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"optional": {
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"llm_dim": ("INT", {
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"default": 1152,
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"min": 512,
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"max": 4096
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}),
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"sdxl_seq_dim": ("INT", {
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"default": 2048,
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"min": 1024,
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"max": 4096
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}),
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"sdxl_pooled_dim": ("INT", {
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"default": 1280,
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"min": 512,
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"max": 2048
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}),
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"target_seq_len": ("INT", {
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"default": 308,
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"min": 64,
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"max": 1024
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}),
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"n_wide_blocks": ("INT", {
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"default": 2,
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"min": 1,
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"max": 8
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}),
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"n_narrow_blocks": ("INT", {
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"default": 3,
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"min": 1,
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"max": 8
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}),
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"num_heads": ("INT", {
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"default": 16,
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"min": 4,
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"max": 32
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}),
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"dropout": ("FLOAT", {
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"default": 0.1,
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"min": 0.0,
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"max": 0.5,
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"step": 0.01
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}),
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"device": (["auto", "cuda:0", "cuda:1", "cpu"], {
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"default": "auto"
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}),
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"force_reload": ("BOOLEAN", {
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"default": False
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}),
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}
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}
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RETURN_TYPES = ("LLM_ADAPTER", "STRING")
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RETURN_NAMES = ("llm_adapter", "info")
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FUNCTION = "load_adapter"
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CATEGORY = "llm_sdxl"
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def load_adapter(self, adapter_path, llm_dim=1152, sdxl_seq_dim=2048, sdxl_pooled_dim=1280,
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target_seq_len=308, n_wide_blocks=2, n_narrow_blocks=3, num_heads=16, dropout=0.1, device="auto", force_reload=False):
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"""Load and initialize the LLM to SDXL adapter"""
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if device == "auto":
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device = self.device
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try:
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# Check if we need to reload
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if force_reload or self.adapter is None or self.current_adapter_path != adapter_path:
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# Clear previous adapter
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if self.adapter is not None:
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del self.adapter
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gc.collect()
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torch.cuda.empty_cache()
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logger.info(f"Loading LLM to SDXL adapter from {adapter_path}")
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# Initialize adapter with specified parameters
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self.adapter = LLMToSDXLAdapter(
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llm_dim=llm_dim,
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sdxl_seq_dim=sdxl_seq_dim,
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sdxl_pooled_dim=sdxl_pooled_dim,
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target_seq_len=target_seq_len,
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n_wide_blocks=n_wide_blocks,
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n_narrow_blocks=n_narrow_blocks,
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num_heads=num_heads,
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dropout=dropout
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)
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# Load checkpoint if file exists
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if os.path.exists(adapter_path):
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checkpoint = load_file(adapter_path)
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self.adapter.load_state_dict(checkpoint)
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logger.info(f"Loaded adapter weights from {adapter_path}")
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else:
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logger.warning(f"Adapter file not found: {adapter_path}, using initialized weights")
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# Move to device
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self.adapter.to(device)
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self.adapter.eval()
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self.current_adapter_path = adapter_path
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logger.info("LLM to SDXL adapter loaded successfully")
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info = f"Adapter: {adapter_path}\nDevice: {device}\nLLM dim: {llm_dim}\nSDXL seq dim: {sdxl_seq_dim}\nTarget seq len: {target_seq_len}"
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return (self.adapter, info)
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except Exception as e:
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logger.error(f"Failed to load adapter: {str(e)}")
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raise Exception(f"Adapter loading failed: {str(e)}")
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@classmethod
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def IS_CHANGED(cls, adapter_path, **kwargs):
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"""ComfyUI change detection"""
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return hash(adapter_path + str(kwargs))
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# Node mapping for ComfyUI registration
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NODE_CLASS_MAPPINGS = {
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"LLMAdapterLoader": LLMAdapterLoader,
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}
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NODE_DISPLAY_NAME_MAPPINGS = {
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"LLMAdapterLoader": "LLM Adapter Loader",
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} |