[WIP] Add Latent Consistency Model Img2Img Pipeline

src/diffusers/__init__.py

@@ -227,6 +227,7 @@
             "KandinskyV22Pipeline",
             "KandinskyV22PriorEmb2EmbPipeline",
             "KandinskyV22PriorPipeline",
+            "LatentConsistencyModelImg2ImgPipeline",
             "LatentConsistencyModelPipeline",
             "LDMTextToImagePipeline",
             "MusicLDMPipeline",
@@ -567,6 +568,7 @@
             KandinskyV22Pipeline,
             KandinskyV22PriorEmb2EmbPipeline,
             KandinskyV22PriorPipeline,
+            LatentConsistencyModelImg2ImgPipeline,
             LatentConsistencyModelPipeline,
             LDMTextToImagePipeline,
             MusicLDMPipeline,

src/diffusers/pipelines/__init__.py

@@ -109,7 +109,10 @@
         "KandinskyV22PriorEmb2EmbPipeline",
         "KandinskyV22PriorPipeline",
     ]
-    _import_structure["latent_consistency_models"] = ["LatentConsistencyModelPipeline"]
+    _import_structure["latent_consistency_models"] = [
+        "LatentConsistencyModelImg2ImgPipeline",
+        "LatentConsistencyModelPipeline",
+    ]
     _import_structure["latent_diffusion"].extend(["LDMTextToImagePipeline"])
     _import_structure["musicldm"] = ["MusicLDMPipeline"]
     _import_structure["paint_by_example"] = ["PaintByExamplePipeline"]
@@ -332,7 +335,7 @@
             KandinskyV22PriorEmb2EmbPipeline,
             KandinskyV22PriorPipeline,
         )
-        from .latent_consistency_models import LatentConsistencyModelPipeline
+        from .latent_consistency_models import LatentConsistencyModelImg2ImgPipeline, LatentConsistencyModelPipeline
         from .latent_diffusion import LDMTextToImagePipeline
         from .musicldm import MusicLDMPipeline
         from .paint_by_example import PaintByExamplePipeline

src/diffusers/pipelines/latent_consistency_models/__init__.py

@@ -1,15 +1,39 @@
 from typing import TYPE_CHECKING
 
 from ...utils import (
+    DIFFUSERS_SLOW_IMPORT,
+    OptionalDependencyNotAvailable,
     _LazyModule,
+    get_objects_from_module,
+    is_torch_available,
+    is_transformers_available,
 )
 
 
-_import_structure = {"pipeline_latent_consistency_models": ["LatentConsistencyModelPipeline"]}
+_dummy_objects = {}
+_import_structure = {}
 
+try:
+    if not (is_transformers_available() and is_torch_available()):
+        raise OptionalDependencyNotAvailable()
+except OptionalDependencyNotAvailable:
+    from ...utils import dummy_torch_and_transformers_objects  # noqa F403
+
+    _dummy_objects.update(get_objects_from_module(dummy_torch_and_transformers_objects))
+else:
+    _import_structure["pipeline_latent_consistency_models"] = ["LatentConsistencyModelPipeline"]
+    _import_structure["pipeline_latent_consistency_models_img2img"] = ["LatentConsistencyModelImg2ImgPipeline"]
 
-if TYPE_CHECKING:
-    from .pipeline_latent_consistency_models import LatentConsistencyModelPipeline
+
+if TYPE_CHECKING or DIFFUSERS_SLOW_IMPORT:
+    try:
+        if not (is_transformers_available() and is_torch_available()):
+            raise OptionalDependencyNotAvailable()
+    except OptionalDependencyNotAvailable:
+        from ...utils.dummy_torch_and_transformers_objects import *  # noqa F403
+    else:
+        from .pipeline_latent_consistency_models import LatentConsistencyModelPipeline
+        from .pipeline_latent_consistency_models_img2img import LatentConsistencyModelImg2ImgPipeline
 
 else:
     import sys
@@ -20,3 +44,6 @@
         _import_structure,
         module_spec=__spec__,
     )
+
+    for name, value in _dummy_objects.items():
+        setattr(sys.modules[__name__], name, value)