xt prompt and an initial image to condition the generation of new images as well as a depth_map to preserve the images’ structure. 
The original codebase can be found here: 
Stable Diffusion v2: Stability-AI/stablediffusion
Available Checkpoints are:
stable-diffusion-2-depth: stabilityai/stable-diffusion-2-depth

class diffusers.StableDiffusionDepth2ImgPipeline

<
source
>
(
vae: AutoencoderKL
text_encoder: CLIPTextModel
tokenizer: CLIPTokenize