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48
vendor/ComfyUI/comfy/text_encoders/cogvideo.py
vendored
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48
vendor/ComfyUI/comfy/text_encoders/cogvideo.py
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import comfy.text_encoders.sd3_clip
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from comfy import sd1_clip
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class CogVideoXT5Tokenizer(comfy.text_encoders.sd3_clip.T5XXLTokenizer):
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"""Inner T5 tokenizer for CogVideoX.
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CogVideoX was trained with T5 embeddings padded to 226 tokens (not 77 like SD3).
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Used both directly by supported_models.CogVideoX_T2V.clip_target (paired with
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the raw T5XXLModel) and by the CogVideoXTokenizer outer wrapper below.
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"""
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def __init__(self, embedding_directory=None, tokenizer_data={}):
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super().__init__(embedding_directory=embedding_directory, tokenizer_data=tokenizer_data, min_length=226)
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class CogVideoXTokenizer(sd1_clip.SD1Tokenizer):
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"""Outer tokenizer wrapper for CLIPLoader (type="cogvideox")."""
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def __init__(self, embedding_directory=None, tokenizer_data={}):
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super().__init__(embedding_directory=embedding_directory, tokenizer_data=tokenizer_data,
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clip_name="t5xxl", tokenizer=CogVideoXT5Tokenizer)
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class CogVideoXT5XXL(sd1_clip.SD1ClipModel):
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"""Outer T5XXL model wrapper for CLIPLoader (type="cogvideox").
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Wraps the raw T5XXL model in the SD1ClipModel interface so that CLIP.__init__
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(which reads self.dtypes) works correctly. The inner model is the standard
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sd3_clip.T5XXLModel (no attention_mask change needed for CogVideoX).
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"""
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def __init__(self, device="cpu", dtype=None, model_options={}):
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super().__init__(device=device, dtype=dtype, name="t5xxl",
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clip_model=comfy.text_encoders.sd3_clip.T5XXLModel,
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model_options=model_options)
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def cogvideo_te(dtype_t5=None, t5_quantization_metadata=None):
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"""Factory that returns a CogVideoXT5XXL class configured with the detected
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T5 dtype and optional quantization metadata, for use in load_text_encoder_state_dicts.
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"""
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class CogVideoXTEModel_(CogVideoXT5XXL):
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def __init__(self, device="cpu", dtype=None, model_options={}):
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if t5_quantization_metadata is not None:
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model_options = model_options.copy()
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model_options["t5xxl_quantization_metadata"] = t5_quantization_metadata
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if dtype_t5 is not None:
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dtype = dtype_t5
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super().__init__(device=device, dtype=dtype, model_options=model_options)
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return CogVideoXTEModel_
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