update

src/diffusers/pipelines/stable_cascade/pipeline_stable_cascade.py

@@ -289,7 +289,9 @@ class StableCascadeDecoderPipeline(DiffusionPipeline):
         guidance_scale: float = 0.0,
         negative_prompt: Optional[Union[str, List[str]]] = None,
         prompt_embeds: Optional[torch.FloatTensor] = None,
+        prompt_embeds_pooled: Optional[torch.FloatTensor] = None,
         negative_prompt_embeds: Optional[torch.FloatTensor] = None,
+        negative_prompt_embeds_pooled: Optional[torch.FloatTensor] = None,
         num_images_per_prompt: int = 1,
         generator: Optional[Union[torch.Generator, List[torch.Generator]]] = None,
         latents: Optional[torch.FloatTensor] = None,
@@ -321,10 +323,17 @@ class StableCascadeDecoderPipeline(DiffusionPipeline):
             prompt_embeds (`torch.FloatTensor`, *optional*):
                 Pre-generated text embeddings. Can be used to easily tweak text inputs, *e.g.* prompt weighting. If not
                 provided, text embeddings will be generated from `prompt` input argument.
+            prompt_embeds_pooled (`torch.FloatTensor`, *optional*):
+                Pre-generated pooled text embeddings. Can be used to easily tweak text inputs, *e.g.* prompt weighting.
+                If not provided, pooled text embeddings will be generated from `prompt` input argument.
             negative_prompt_embeds (`torch.FloatTensor`, *optional*):
                 Pre-generated negative text embeddings. Can be used to easily tweak text inputs, *e.g.* prompt
                 weighting. If not provided, negative_prompt_embeds will be generated from `negative_prompt` input
                 argument.
+            negative_prompt_embeds_pooled (`torch.FloatTensor`, *optional*):
+                Pre-generated negative pooled text embeddings. Can be used to easily tweak text inputs, *e.g.* prompt
+                weighting. If not provided, negative_prompt_embeds_pooled will be generated from `negative_prompt` input
+                argument.
             num_images_per_prompt (`int`, *optional*, defaults to 1):
                 The number of images to generate per prompt.
             generator (`torch.Generator` or `List[torch.Generator]`, *optional*):
@@ -378,7 +387,7 @@ class StableCascadeDecoderPipeline(DiffusionPipeline):
 
         # 2. Encode caption
         if prompt_embeds is None and negative_prompt_embeds is None:
-            prompt_embeds, _, negative_prompt_embeds, _ = self.encode_prompt(
+            _, prompt_embeds_pooled, _, negative_prompt_embeds_pooled = self.encode_prompt(
                 prompt=prompt,
                 device=device,
                 batch_size=batch_size,
@@ -386,10 +395,16 @@ class StableCascadeDecoderPipeline(DiffusionPipeline):
                 do_classifier_free_guidance=self.do_classifier_free_guidance,
                 negative_prompt=negative_prompt,
                 prompt_embeds=prompt_embeds,
+                prompt_embeds_pooled=prompt_embeds_pooled,
                 negative_prompt_embeds=negative_prompt_embeds,
+                negative_prompt_embeds_pooled=negative_prompt_embeds_pooled,
             )
+
+        # The pooled embeds from the prior are pooled again before being passed to the decoder
         prompt_embeds_pooled = (
-            torch.cat([prompt_embeds, negative_prompt_embeds]) if self.do_classifier_free_guidance else prompt_embeds
+            torch.cat([prompt_embeds_pooled, negative_prompt_embeds_pooled])
+            if self.do_classifier_free_guidance
+            else prompt_embeds_pooled
         )
         effnet = (
             torch.cat([image_embeddings, torch.zeros_like(image_embeddings)])

src/diffusers/pipelines/stable_cascade/pipeline_stable_cascade_combined.py

@@ -155,14 +155,14 @@ class StableCascadeCombinedPipeline(DiffusionPipeline):
         height: int = 512,
         width: int = 512,
         prior_num_inference_steps: int = 60,
-        prior_timesteps: Optional[List[float]] = None,
         prior_guidance_scale: float = 4.0,
         num_inference_steps: int = 12,
-        decoder_timesteps: Optional[List[float]] = None,
         decoder_guidance_scale: float = 0.0,
         negative_prompt: Optional[Union[str, List[str]]] = None,
         prompt_embeds: Optional[torch.FloatTensor] = None,
+        prompt_embeds_pooled: Optional[torch.FloatTensor] = None,
         negative_prompt_embeds: Optional[torch.FloatTensor] = None,
+        negative_prompt_embeds_pooled: Optional[torch.FloatTensor] = None,
         num_images_per_prompt: int = 1,
         generator: Optional[Union[torch.Generator, List[torch.Generator]]] = None,
         latents: Optional[torch.FloatTensor] = None,
@@ -187,10 +187,17 @@ class StableCascadeCombinedPipeline(DiffusionPipeline):
             prompt_embeds (`torch.FloatTensor`, *optional*):
                 Pre-generated text embeddings for the prior. Can be used to easily tweak text inputs, *e.g.* prompt
                 weighting. If not provided, text embeddings will be generated from `prompt` input argument.
+            prompt_embeds_pooled (`torch.FloatTensor`, *optional*):
+                Pre-generated text embeddings for the prior. Can be used to easily tweak text inputs, *e.g.* prompt
+                weighting. If not provided, text embeddings will be generated from `prompt` input argument.
             negative_prompt_embeds (`torch.FloatTensor`, *optional*):
                 Pre-generated negative text embeddings for the prior. Can be used to easily tweak text inputs, *e.g.*
                 prompt weighting. If not provided, negative_prompt_embeds will be generated from `negative_prompt`
                 input argument.
+            negative_prompt_embeds_pooled (`torch.FloatTensor`, *optional*):
+                Pre-generated negative text embeddings for the prior. Can be used to easily tweak text inputs, *e.g.*
+                prompt weighting. If not provided, negative_prompt_embeds will be generated from `negative_prompt`
+                input argument.
             num_images_per_prompt (`int`, *optional*, defaults to 1):
                 The number of images to generate per prompt.
             height (`int`, *optional*, defaults to 512):
@@ -253,7 +260,6 @@ class StableCascadeCombinedPipeline(DiffusionPipeline):
             [`~pipelines.ImagePipelineOutput`] or `tuple` [`~pipelines.ImagePipelineOutput`] if `return_dict` is True,
             otherwise a `tuple`. When returning a tuple, the first element is a list with the generated images.
         """
-
         prior_outputs = self.prior_pipe(
             prompt=prompt if prompt_embeds is None else None,
             images=images,
@@ -263,7 +269,9 @@ class StableCascadeCombinedPipeline(DiffusionPipeline):
             guidance_scale=prior_guidance_scale,
             negative_prompt=negative_prompt if negative_prompt_embeds is None else None,
             prompt_embeds=prompt_embeds,
+            prompt_embeds_pooled=prompt_embeds_pooled,
             negative_prompt_embeds=negative_prompt_embeds,
+            negative_prompt_embeds_pooled=negative_prompt_embeds_pooled,
             num_images_per_prompt=num_images_per_prompt,
             generator=generator,
             latents=latents,
@@ -274,7 +282,9 @@ class StableCascadeCombinedPipeline(DiffusionPipeline):
         )
         image_embeddings = prior_outputs.image_embeddings
         prompt_embeds = prior_outputs.get("prompt_embeds", None)
+        prompt_embeds_pooled = prior_outputs.get("prompt_embeds_pooled", None)
         negative_prompt_embeds = prior_outputs.get("negative_prompt_embeds", None)
+        negative_prompt_embeds_pooled = prior_outputs.get("negative_prompt_embeds_pooled", None)
 
         outputs = self.decoder_pipe(
             image_embeddings=image_embeddings,
@@ -283,7 +293,9 @@ class StableCascadeCombinedPipeline(DiffusionPipeline):
             guidance_scale=decoder_guidance_scale,
             negative_prompt=negative_prompt if negative_prompt_embeds is None else None,
             prompt_embeds=prompt_embeds,
+            prompt_embeds_pooled=prompt_embeds_pooled,
             negative_prompt_embeds=negative_prompt_embeds,
+            negative_prompt_embeds_pooled=negative_prompt_embeds_pooled,
             generator=generator,
             output_type=output_type,
             return_dict=return_dict,

src/diffusers/pipelines/stable_cascade/pipeline_stable_cascade_prior.py

@@ -64,7 +64,9 @@ class StableCascadePriorPipelineOutput(BaseOutput):
 
     image_embeddings: Union[torch.FloatTensor, np.ndarray]
     prompt_embeds: Union[torch.FloatTensor, np.ndarray]
+    prompt_embeds_pooled: Union[torch.FloatTensor, np.ndarray]
     negative_prompt_embeds: Union[torch.FloatTensor, np.ndarray]
+    negative_prompt_embeds_pooled: Union[torch.FloatTensor, np.ndarray]
 
 
 class StableCascadePriorPipeline(DiffusionPipeline):
@@ -305,6 +307,16 @@ class StableCascadePriorPipeline(DiffusionPipeline):
                     f" {negative_prompt_embeds.shape}."
                 )
 
+        if prompt_embeds is not None and prompt_embeds_pooled is None:
+            raise ValueError(
+                "If `prompt_embeds` are provided, `prompt_embeds_pooled` must also be provided. Make sure to generate `prompt_embeds_pooled` from the same text encoder that was used to generate `prompt_embeds`"
+            )
+
+        if negative_prompt_embeds is not None and negative_prompt_embeds_pooled is None:
+            raise ValueError(
+                "If `negative_prompt_embeds` are provided, `negative_prompt_embeds_pooled` must also be provided. Make sure to generate `prompt_embeds_pooled` from the same text encoder that was used to generate `prompt_embeds`"
+            )
+
         if prompt_embeds_pooled is not None and negative_prompt_embeds_pooled is not None:
             if prompt_embeds_pooled.shape != negative_prompt_embeds_pooled.shape:
                 raise ValueError(
@@ -339,7 +351,7 @@ class StableCascadePriorPipeline(DiffusionPipeline):
     def num_timesteps(self):
         return self._num_timesteps
 
-    def get_t_condioning(self, t, alphas_cumprod):
+    def get_timestep_ratio_conditioning(self, t, alphas_cumprod):
         s = torch.tensor([0.003])
         clamp_range = [0, 1]
         min_var = torch.cos(s / (1 + s) * torch.pi * 0.5) ** 2
@@ -558,7 +570,7 @@ class StableCascadePriorPipeline(DiffusionPipeline):
         for i, t in enumerate(self.progress_bar(timesteps)):
             if not isinstance(self.scheduler, DDPMWuerstchenScheduler):
                 if len(alphas_cumprod) > 0:
-                    timestep_ratio = self.get_t_condioning(t.long().cpu(), alphas_cumprod)
+                    timestep_ratio = self.get_timestep_ratio_conditioning(t.long().cpu(), alphas_cumprod)
                     timestep_ratio = timestep_ratio.expand(latents.size(0)).to(dtype).to(device)
                 else:
                     timestep_ratio = t.float().div(self.scheduler.timesteps[-1]).expand(latents.size(0)).to(dtype)
@@ -609,6 +621,18 @@ class StableCascadePriorPipeline(DiffusionPipeline):
             )  # float() as bfloat16-> numpy doesnt work
 
         if not return_dict:
-            return (latents, prompt_embeds, negative_prompt_embeds)
+            return (
+                latents,
+                prompt_embeds,
+                prompt_embeds_pooled,
+                negative_prompt_embeds,
+                negative_prompt_embeds_pooled,
+            )
 
-        return StableCascadePriorPipelineOutput(latents, prompt_embeds, negative_prompt_embeds)
+        return StableCascadePriorPipelineOutput(
+            image_embeddings=latents,
+            prompt_embeds=prompt_embeds,
+            prompt_embeds_pooled=prompt_embeds_pooled,
+            negative_prompt_embeds=negative_prompt_embeds,
+            negative_prompt_embeds_pooled=negative_prompt_embeds_pooled,
+        )

tests/pipelines/stable_cascade/test_stable_cascade_combined.py

@@ -241,6 +241,39 @@ class StableCascadeCombinedPipelineFastTests(PipelineTesterMixin, unittest.TestC
     def test_callback_inputs(self):
         super().test_callback_inputs()
 
-    # def test_callback_cfg(self):
-    #     pass
-    #     pass
+    def test_stable_cascade_combined_prompt_embeds(self):
+        device = "cpu"
+        components = self.get_dummy_components()
+
+        pipe = StableCascadeCombinedPipeline(**components)
+        pipe.set_progress_bar_config(disable=None)
+
+        prompt = "A photograph of a shiba inu, wearing a hat"
+        (
+            prompt_embeds,
+            prompt_embeds_pooled,
+            negative_prompt_embeds,
+            negative_prompt_embeds_pooled,
+        ) = pipe.prior_pipe.encode_prompt(device, 1, 1, False, prompt=prompt)
+        generator = torch.Generator(device=device)
+
+        output_prompt = pipe(
+            prompt=prompt,
+            num_inference_steps=1,
+            prior_num_inference_steps=1,
+            output_type="np",
+            generator=generator.manual_seed(0),
+        )
+        output_prompt_embeds = pipe(
+            prompt=None,
+            prompt_embeds=prompt_embeds,
+            prompt_embeds_pooled=prompt_embeds_pooled,
+            negative_prompt_embeds=negative_prompt_embeds,
+            negative_prompt_embeds_pooled=negative_prompt_embeds_pooled,
+            num_inference_steps=1,
+            prior_num_inference_steps=1,
+            output_type="np",
+            generator=generator.manual_seed(0),
+        )
+
+        assert np.abs(output_prompt.images - output_prompt_embeds.images).max() < 1e-5

tests/pipelines/stable_cascade/test_stable_cascade_decoder.py

@@ -207,6 +207,45 @@ class StableCascadeDecoderPipelineFastTests(PipelineTesterMixin, unittest.TestCa
     def test_float16_inference(self):
         super().test_float16_inference()
 
+    def test_stable_cascade_decoder_prompt_embeds(self):
+        device = "cpu"
+        components = self.get_dummy_components()
+
+        pipe = StableCascadeDecoderPipeline(**components)
+        pipe.set_progress_bar_config(disable=None)
+
+        inputs = self.get_dummy_inputs(device)
+        image_embeddings = inputs["image_embeddings"]
+        prompt = "A photograph of a shiba inu, wearing a hat"
+        (
+            prompt_embeds,
+            prompt_embeds_pooled,
+            negative_prompt_embeds,
+            negative_prompt_embeds_pooled,
+        ) = pipe.encode_prompt(device, 1, 1, False, prompt=prompt)
+        generator = torch.Generator(device=device)
+
+        decoder_output_prompt = pipe(
+            image_embeddings=image_embeddings,
+            prompt=prompt,
+            num_inference_steps=1,
+            output_type="np",
+            generator=generator.manual_seed(0),
+        )
+        decoder_output_prompt_embeds = pipe(
+            image_embeddings=image_embeddings,
+            prompt=None,
+            prompt_embeds=prompt_embeds,
+            prompt_embeds_pooled=prompt_embeds_pooled,
+            negative_prompt_embeds=negative_prompt_embeds,
+            negative_prompt_embeds_pooled=negative_prompt_embeds_pooled,
+            num_inference_steps=1,
+            output_type="np",
+            generator=generator.manual_seed(0),
+        )
+
+        assert np.abs(decoder_output_prompt.images - decoder_output_prompt_embeds.images).max() < 1e-5
+
 
 @slow
 @require_torch_gpu

tests/pipelines/stable_cascade/test_stable_cascade_prior.py

@@ -273,6 +273,41 @@ class StableCascadePriorPipelineFastTests(PipelineTesterMixin, unittest.TestCase
 
         self.assertTrue(image_embed.shape == lora_image_embed.shape)
 
+    def test_stable_cascade_decoder_prompt_embeds(self):
+        device = "cpu"
+        components = self.get_dummy_components()
+
+        pipe = self.pipeline_class(**components)
+        pipe.set_progress_bar_config(disable=None)
+
+        prompt = "A photograph of a shiba inu, wearing a hat"
+        (
+            prompt_embeds,
+            prompt_embeds_pooled,
+            negative_prompt_embeds,
+            negative_prompt_embeds_pooled,
+        ) = pipe.encode_prompt(device, 1, 1, False, prompt=prompt)
+        generator = torch.Generator(device=device)
+
+        output_prompt = pipe(
+            prompt=prompt,
+            num_inference_steps=1,
+            output_type="np",
+            generator=generator.manual_seed(0),
+        )
+        output_prompt_embeds = pipe(
+            prompt=None,
+            prompt_embeds=prompt_embeds,
+            prompt_embeds_pooled=prompt_embeds_pooled,
+            negative_prompt_embeds=negative_prompt_embeds,
+            negative_prompt_embeds_pooled=negative_prompt_embeds_pooled,
+            num_inference_steps=1,
+            output_type="np",
+            generator=generator.manual_seed(0),
+        )
+
+        assert np.abs(output_prompt.image_embeddings - output_prompt_embeds.image_embeddings).max() < 1e-5
+
 
 @slow
 @require_torch_gpu