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https://github.com/invoke-ai/InvokeAI
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76 lines
2.9 KiB
Python
76 lines
2.9 KiB
Python
# Copyright (c) 2023 The InvokeAI Development Team
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"""Utilities used by the Model Manager"""
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def lora_token_vector_length(checkpoint: dict) -> int:
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"""
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Given a checkpoint in memory, return the lora token vector length
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:param checkpoint: The checkpoint
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"""
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def _get_shape_1(key, tensor, checkpoint):
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lora_token_vector_length = None
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if "." not in key:
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return lora_token_vector_length # wrong key format
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model_key, lora_key = key.split(".", 1)
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# check lora/locon
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if lora_key == "lora_down.weight":
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lora_token_vector_length = tensor.shape[1]
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# check loha (don't worry about hada_t1/hada_t2 as it used only in 4d shapes)
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elif lora_key in ["hada_w1_b", "hada_w2_b"]:
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lora_token_vector_length = tensor.shape[1]
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# check lokr (don't worry about lokr_t2 as it used only in 4d shapes)
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elif "lokr_" in lora_key:
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if model_key + ".lokr_w1" in checkpoint:
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_lokr_w1 = checkpoint[model_key + ".lokr_w1"]
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elif model_key + "lokr_w1_b" in checkpoint:
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_lokr_w1 = checkpoint[model_key + ".lokr_w1_b"]
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else:
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return lora_token_vector_length # unknown format
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if model_key + ".lokr_w2" in checkpoint:
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_lokr_w2 = checkpoint[model_key + ".lokr_w2"]
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elif model_key + "lokr_w2_b" in checkpoint:
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_lokr_w2 = checkpoint[model_key + ".lokr_w2_b"]
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else:
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return lora_token_vector_length # unknown format
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lora_token_vector_length = _lokr_w1.shape[1] * _lokr_w2.shape[1]
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elif lora_key == "diff":
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lora_token_vector_length = tensor.shape[1]
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# ia3 can be detected only by shape[0] in text encoder
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elif lora_key == "weight" and "lora_unet_" not in model_key:
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lora_token_vector_length = tensor.shape[0]
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return lora_token_vector_length
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lora_token_vector_length = None
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lora_te1_length = None
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lora_te2_length = None
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for key, tensor in checkpoint.items():
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if key.startswith("lora_unet_") and ("_attn2_to_k." in key or "_attn2_to_v." in key):
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lora_token_vector_length = _get_shape_1(key, tensor, checkpoint)
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elif key.startswith("lora_te") and "_self_attn_" in key:
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tmp_length = _get_shape_1(key, tensor, checkpoint)
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if key.startswith("lora_te_"):
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lora_token_vector_length = tmp_length
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elif key.startswith("lora_te1_"):
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lora_te1_length = tmp_length
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elif key.startswith("lora_te2_"):
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lora_te2_length = tmp_length
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if lora_te1_length is not None and lora_te2_length is not None:
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lora_token_vector_length = lora_te1_length + lora_te2_length
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if lora_token_vector_length is not None:
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break
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return lora_token_vector_length
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