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apply repeat_interleave fix for mps to stable diffusion image2image pipeline #1135

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Merged
merged 1 commit into from
Nov 9, 2022
Merged

apply repeat_interleave fix for mps to stable diffusion image2image pipeline #1135

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6 changes: 4 additions & 2 deletions src/diffusers/pipelines/stable_diffusion/pipeline_stable_diffusion_img2img.py
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Original file line number Diff line number Diff line change
Expand Up @@ -284,8 +284,10 @@ def __call__(
text_input_ids = text_input_ids[:, : self.tokenizer.model_max_length]
text_embeddings = self.text_encoder(text_input_ids.to(self.device))[0]

# duplicate text embeddings for each generation per prompt
text_embeddings = text_embeddings.repeat_interleave(num_images_per_prompt, dim=0)
# duplicate text embeddings for each generation per prompt, using mps friendly method
bs_embed, seq_len, _ = text_embeddings.shape
text_embeddings = text_embeddings.repeat(1, num_images_per_prompt, 1)
text_embeddings = text_embeddings.view(bs_embed * num_images_per_prompt, seq_len, -1)

# here `guidance_scale` is defined analog to the guidance weight `w` of equation (2)
# of the Imagen paper: https://arxiv.org/pdf/2205.11487.pdf . `guidance_scale = 1`
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