Move the stable-diffusion modeling code so that it's easier to re-use. (#812)

candle-examples/examples/stable-diffusion/main.rs

@@ -4,17 +4,7 @@ extern crate accelerate_src;
 #[cfg(feature = "mkl")]
 extern crate intel_mkl_src;
 
-mod attention;
-mod clip;
-mod ddim;
-mod embeddings;
-mod resnet;
-mod schedulers;
-mod stable_diffusion;
-mod unet_2d;
-mod unet_2d_blocks;
-mod utils;
-mod vae;
+use candle_transformers::models::stable_diffusion;
 
 use anyhow::{Error as E, Result};
 use candle::{DType, Device, IndexOp, Tensor, D};

candle-transformers/src/models/mod.rs

@@ -6,4 +6,5 @@ pub mod falcon;
 pub mod llama;
 pub mod quantized_llama;
 pub mod segment_anything;
+pub mod stable_diffusion;
 pub mod whisper;

candle-transformers/src/models/stable_diffusion/ddim.rs

@@ -7,7 +7,7 @@
 //!
 //! Denoising Diffusion Implicit Models, J. Song et al, 2020.
 //! https://arxiv.org/abs/2010.02502
-use crate::schedulers::{betas_for_alpha_bar, BetaSchedule, PredictionType};
+use super::schedulers::{betas_for_alpha_bar, BetaSchedule, PredictionType};
 use candle::{Result, Tensor};
 
 /// The configuration for the DDIM scheduler.
@@ -67,14 +67,14 @@ impl DDIMScheduler {
             .rev()
             .collect();
         let betas = match config.beta_schedule {
-            BetaSchedule::ScaledLinear => crate::utils::linspace(
+            BetaSchedule::ScaledLinear => super::utils::linspace(
                 config.beta_start.sqrt(),
                 config.beta_end.sqrt(),
                 config.train_timesteps,
             )?
             .sqr()?,
             BetaSchedule::Linear => {
-                crate::utils::linspace(config.beta_start, config.beta_end, config.train_timesteps)?
+                super::utils::linspace(config.beta_start, config.beta_end, config.train_timesteps)?
             }
             BetaSchedule::SquaredcosCapV2 => betas_for_alpha_bar(config.train_timesteps, 0.999)?,
         };

candle-transformers/src/models/stable_diffusion/mod.rs

@@ -1,5 +1,14 @@
-use crate::schedulers::PredictionType;
-use crate::{clip, ddim, unet_2d, vae};
+pub mod attention;
+pub mod clip;
+pub mod ddim;
+pub mod embeddings;
+pub mod resnet;
+pub mod schedulers;
+pub mod unet_2d;
+pub mod unet_2d_blocks;
+pub mod utils;
+pub mod vae;
+
 use candle::{DType, Device, Result};
 use candle_nn as nn;
 
@@ -80,7 +89,7 @@ impl StableDiffusionConfig {
         sliced_attention_size: Option<usize>,
         height: Option<usize>,
         width: Option<usize>,
-        prediction_type: PredictionType,
+        prediction_type: schedulers::PredictionType,
     ) -> Self {
         let bc = |out_channels, use_cross_attn, attention_head_dim| unet_2d::BlockConfig {
             out_channels,
@@ -154,7 +163,7 @@ impl StableDiffusionConfig {
             sliced_attention_size,
             height,
             width,
-            PredictionType::VPrediction,
+            schedulers::PredictionType::VPrediction,
         )
     }
 
@@ -162,7 +171,7 @@ impl StableDiffusionConfig {
         sliced_attention_size: Option<usize>,
         height: Option<usize>,
         width: Option<usize>,
-        prediction_type: PredictionType,
+        prediction_type: schedulers::PredictionType,
     ) -> Self {
         let bc = |out_channels, use_cross_attn, attention_head_dim| unet_2d::BlockConfig {
             out_channels,
@@ -235,7 +244,7 @@ impl StableDiffusionConfig {
             height,
             width,
             // https://huggingface.co/stabilityai/stable-diffusion-xl-base-1.0/blob/main/scheduler/scheduler_config.json
-            PredictionType::Epsilon,
+            schedulers::PredictionType::Epsilon,
         )
     }
 

candle-transformers/src/models/stable_diffusion/resnet.rs

@@ -4,7 +4,7 @@
 //!
 //! Denoising Diffusion Implicit Models, K. He and al, 2015.
 //! https://arxiv.org/abs/1512.03385
-use crate::utils::{conv2d, Conv2d};
+use super::utils::{conv2d, Conv2d};
 use candle::{Result, Tensor, D};
 use candle_nn as nn;
 use candle_nn::Module;

candle-transformers/src/models/stable_diffusion/unet_2d.rs

@@ -2,9 +2,9 @@
 //!
 //! The 2D Unet models take as input a noisy sample and the current diffusion
 //! timestep and return a denoised version of the input.
-use crate::embeddings::{TimestepEmbedding, Timesteps};
-use crate::unet_2d_blocks::*;
-use crate::utils::{conv2d, Conv2d};
+use super::embeddings::{TimestepEmbedding, Timesteps};
+use super::unet_2d_blocks::*;
+use super::utils::{conv2d, Conv2d};
 use candle::{Result, Tensor};
 use candle_nn as nn;
 use candle_nn::Module;

candle-transformers/src/models/stable_diffusion/unet_2d_blocks.rs

@@ -1,10 +1,10 @@
 //! 2D UNet Building Blocks
 //!
-use crate::attention::{
+use super::attention::{
     AttentionBlock, AttentionBlockConfig, SpatialTransformer, SpatialTransformerConfig,
 };
-use crate::resnet::{ResnetBlock2D, ResnetBlock2DConfig};
-use crate::utils::{conv2d, Conv2d};
+use super::resnet::{ResnetBlock2D, ResnetBlock2DConfig};
+use super::utils::{conv2d, Conv2d};
 use candle::{Result, Tensor, D};
 use candle_nn as nn;
 

candle-transformers/src/models/stable_diffusion/vae.rs

@@ -4,7 +4,7 @@
 //! Auto-encoder models compress their input to a usually smaller latent space
 //! before expanding it back to its original shape. This results in the latent values
 //! compressing the original information.
-use crate::unet_2d_blocks::{
+use super::unet_2d_blocks::{
     DownEncoderBlock2D, DownEncoderBlock2DConfig, UNetMidBlock2D, UNetMidBlock2DConfig,
     UpDecoderBlock2D, UpDecoderBlock2DConfig,
 };