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+# coding=utf-8
+# Copyright 2024 The HuggingFace Inc. team. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+"""Hiera model configuration"""
+
+from ...configuration_utils import PretrainedConfig
+from ...utils import logging
+from ...utils.backbone_utils import BackboneConfigMixin, get_aligned_output_features_output_indices
+
+
+logger = logging.get_logger(__name__)
+
+
+class HieraConfig(BackboneConfigMixin, PretrainedConfig):
+    r"""
+    This is the configuration class to store the configuration of a [`HieraModel`]. It is used to instantiate a Hiera
+    model according to the specified arguments, defining the model architecture. Instantiating a configuration with the
+    defaults will yield a similar configuration to that of the Hiera
+    [facebook/hiera-base-224](https://huggingface.co/facebook/hiera-base-224) architecture.
+
+    Configuration objects inherit from [`PretrainedConfig`] and can be used to control the model outputs. Read the
+    documentation from [`PretrainedConfig`] for more information.
+
+    Args:
+        embed_dim (`int`, *optional*, defaults to 96):
+            Dimensionality of patch embedding.
+        image_size (`list(int)`, *optional*, defaults to `[224, 224]`):
+            The size (resolution) of input in the format (height, width) for images
+            and (frames, height, width) for videos.
+        patch_size (`list(int)`, *optional*, defaults to `[7, 7]`):
+            The size (resolution) of each patch.
+        patch_stride (`list(int)`, *optional*, defaults to `[4, 4]`):
+            The stride of the patch.
+        patch_padding (`list(int)`, *optional*, defaults to `[3, 3]`):
+            The padding of the patch.
+        mlp_ratio (`float`, *optional*, defaults to 4.0):
+            The ratio of mlp hidden dim to embedding dim.
+        depths (`list(int)`, *optional*, defaults to `[2, 3, 16, 3]`):
+            Depth of each layer in the Transformer encoder.
+        num_heads (`list(int)`, *optional*, defaults to `[1, 2, 4, 8]`):
+            Number of attention heads in each layer of the Transformer encoder.
+        embed_dim_multiplier (`float`, *optional*, defaults to 2.0):
+            The multiplier to the dimensionality of patch embedding in each layer of the Transformer encoder.
+        num_query_pool (`int`, *optional*, defaults to 3):
+            The number of query pool stages.
+        query_stride (`list(int)`, *optional*, defaults to `[2, 2]`):
+            The stride of the query pool.
+        masked_unit_size (`list(int)`, *optional*, defaults to `[8, 8]`):
+            The size of the masked unit.
+        masked_unit_attention (`list(bool)`, *optional*, defaults to `[True, True, False, False]`):
+            Whether to use masked unit attention in each layer of the Transformer encoder.
+        drop_path_rate (`float`, *optional*, defaults to 0.0):
+            The drop path rate.
+        num_channels (`int`, *optional*, defaults to 3):
+            The number of input channels.
+        hidden_act (`str`, *optional*, defaults to `"gelu"`):
+            The non-linear activation function (function or string) in the encoder. If string, `"gelu"`, `"relu"`,
+            `"selu"` and `"gelu_new"` are supported.
+        initializer_range (`float`, *optional*, defaults to 0.02):
+            The standard deviation of the truncated_normal_initializer for initializing all weight matrices and
+            the zero_initializer for initializing all bias vectors.
+        layer_norm_init (`float`, *optional*, defaults to 1.0):
+            The initial weight value for layer normalization layers.
+        layer_norm_eps (`float`, *optional*, defaults to 1e-06):
+            The epsilon used by the layer normalization layers.
+        decoder_hidden_size (`int`, *optional*):
+            Dimensionality of decoder embeddings for MAE pretraining.
+        decoder_depth (`int`, *optional*):
+            Depth of the decoder for MAE pretraining.
+        decoder_num_heads (`int`, *optional*):
+            Number of attention heads in each layer of the decoder for MAE pretraining.
+        normalize_pixel_loss (`bool`, *optional*, defaults to `True`):
+            Whether to normalize the pixel loss by the number of pixels.
+        mask_ratio (`float`, *optional*, defaults to 0.6):
+            The ratio of masked tokens in the input.
+        out_features (`list[str]`, *optional*):
+            If used as backbone, list of features to output. Can be any of `"stem"`, `"stage1"`, `"stage2"`, etc.
+            (depending on how many stages the model has). If unset and `out_indices` is set, will default to the
+            corresponding stages. If unset and `out_indices` is unset, will default to the last stage. Must be in the
+            same order as defined in the `stage_names` attribute.
+        out_indices (`list[int]`, *optional*):
+            If used as backbone, list of indices of features to output. Can be any of 0, 1, 2, etc. (depending on how
+            many stages the model has). If unset and `out_features` is set, will default to the corresponding stages.
+            If unset and `out_features` is unset, will default to the last stage. Must be in the
+            same order as defined in the `stage_names` attribute.
+
+
+    Example:
+
+    ```python
+    >>> from transformers import HieraConfig, HieraModel
+
+    >>> # Initializing a Hiera hiera-base-patch16-224 style configuration
+    >>> configuration = HieraConfig()
+
+    >>> # Initializing a model (with random weights) from the hiera-base-patch16-224 style configuration
+    >>> model = HieraModel(configuration)
+
+    >>> # Accessing the model configuration
+    >>> configuration = model.config
+    ```"""
+
+    model_type = "hiera"
+
+    attribute_map = {"num_hidden_layers": "num_layers"}
+
+    def __init__(
+        self,
+        embed_dim=96,
+        image_size=[224, 224],
+        patch_size=[7, 7],
+        patch_stride=[4, 4],
+        patch_padding=[3, 3],
+        mlp_ratio=4.0,
+        depths=[2, 3, 16, 3],
+        num_heads=[1, 2, 4, 8],
+        embed_dim_multiplier=2.0,
+        num_query_pool=3,
+        query_stride=[2, 2],
+        masked_unit_size=[8, 8],
+        masked_unit_attention=[True, True, False, False],
+        drop_path_rate=0.0,
+        num_channels=3,
+        hidden_act="gelu",
+        initializer_range=0.02,
+        layer_norm_init=1.0,
+        layer_norm_eps=1e-6,
+        decoder_hidden_size=None,
+        decoder_depth=None,
+        decoder_num_heads=None,
+        normalize_pixel_loss=True,
+        mask_ratio=0.6,
+        out_features=None,
+        out_indices=None,
+        **kwargs,
+    ):
+        super().__init__(**kwargs)
+        if masked_unit_size[0] % query_stride[0] ** (len(depths) - 1) != 0:
+            raise ValueError(
+                f"masked_unit_size[0] ({masked_unit_size[0]}) must be divisible by query_stride[0] ({query_stride[0]}) "
+                f"raised to the power of the number of layers ({len(depths) - 1})"
+            )
+
+        if num_query_pool >= len(depths):
+            raise ValueError(
+                f"num_query_pool ({num_query_pool}) must be less than the number of layers ({len(depths)})"
+            )
+
+        self.embed_dim = embed_dim
+        self.image_size = image_size
+        self.patch_size = patch_size
+        self.patch_stride = patch_stride
+        self.patch_padding = patch_padding
+        self.mlp_ratio = mlp_ratio
+        self.depths = depths
+        self.num_heads = num_heads
+        self.num_layers = len(depths)
+        self.embed_dim_multiplier = embed_dim_multiplier
+        self.num_query_pool = num_query_pool
+        self.query_stride = query_stride
+        self.masked_unit_size = masked_unit_size
+        self.masked_unit_attention = masked_unit_attention
+        self.drop_path_rate = drop_path_rate
+        self.num_channels = num_channels
+        self.hidden_act = hidden_act
+        self.initializer_range = initializer_range
+        self.layer_norm_init = layer_norm_init
+        self.layer_norm_eps = layer_norm_eps
+        self.decoder_hidden_size = decoder_hidden_size
+        self.decoder_depth = decoder_depth
+        self.decoder_num_heads = decoder_num_heads
+        self.normalize_pixel_loss = normalize_pixel_loss
+        self.mask_ratio = mask_ratio
+        # we set the hidden_size attribute in order to make Hiera work with VisionEncoderDecoderModel
+        # this indicates the channel dimension after the last stage of the model
+        self.hidden_size = int(embed_dim * embed_dim_multiplier ** (len(depths) - 1))
+        self.stage_names = ["stem"] + [f"stage{idx}" for idx in range(1, len(depths) + 1)]
+        self._out_features, self._out_indices = get_aligned_output_features_output_indices(
+            out_features=out_features, out_indices=out_indices, stage_names=self.stage_names
+        )
+
+
+__all__ = ["HieraConfig"]