mirror of
https://git.datalinker.icu/vllm-project/vllm.git
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786 lines
25 KiB
Python
786 lines
25 KiB
Python
# SPDX-License-Identifier: Apache-2.0
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# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
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# Adapted from
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# https://github.com/zai-org/CogAgent
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"""Inference-only CogAgent model compatible with THUDM weights."""
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import itertools
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from argparse import Namespace
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from collections.abc import Mapping, Sequence
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from typing import Annotated, Literal
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import torch
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from torch import nn
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from torch.nn import LayerNorm
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from torchvision import transforms
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from torchvision.transforms import InterpolationMode
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from transformers import BatchFeature, PreTrainedTokenizer, TensorType
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from transformers.image_utils import ImageInput
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from transformers.tokenization_utils_base import TextInput
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from vllm.attention.layer import MultiHeadAttention
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from vllm.config import VllmConfig
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from vllm.config.multimodal import BaseDummyOptions
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from vllm.distributed import get_tensor_model_parallel_world_size
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from vllm.model_executor.layers.activation import SiluAndMul, get_act_fn
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from vllm.model_executor.layers.conv import Conv2dLayer
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from vllm.model_executor.layers.linear import (
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ColumnParallelLinear,
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MergedColumnParallelLinear,
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QKVParallelLinear,
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ReplicatedLinear,
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RowParallelLinear,
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)
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from vllm.model_executor.layers.quantization import QuantizationConfig
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from vllm.model_executor.models.module_mapping import MultiModelKeys
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from vllm.multimodal import MULTIMODAL_REGISTRY
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from vllm.multimodal.inputs import (
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MultiModalDataDict,
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MultiModalFeatureSpec,
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MultiModalFieldConfig,
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MultiModalKwargsItems,
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)
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from vllm.multimodal.parse import MultiModalDataItems
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from vllm.multimodal.processing import (
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BaseMultiModalProcessor,
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BaseProcessingInfo,
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PromptReplacement,
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PromptUpdate,
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)
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from vllm.multimodal.profiling import BaseDummyInputsBuilder
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from vllm.sequence import IntermediateTensors
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from vllm.transformers_utils.configs import ChatGLMConfig
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from vllm.utils.tensor_schema import TensorSchema, TensorShape
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from .chatglm import ChatGLMBaseModel, ChatGLMModel
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from .interfaces import (
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MultiModalEmbeddings,
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SupportsLoRA,
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SupportsMRoPE,
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SupportsMultiModal,
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SupportsPP,
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)
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class GLMVImagePixelInputs(TensorSchema):
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"""
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Dimensions:
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- b: Batch size
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- c: Number of channels (3)
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- h: Height of image
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- w: Width of image
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"""
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type: Literal["pixel_values"] = "pixel_values"
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data: Annotated[torch.Tensor, TensorShape("b", 3, "h", "w")]
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class EVA2CLIPPatchEmbedding(nn.Module):
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def __init__(self, config):
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super().__init__()
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self.proj = Conv2dLayer(
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config.in_channels,
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config.hidden_size,
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kernel_size=config.patch_size,
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stride=config.patch_size,
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)
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self.cls_embedding = nn.Parameter(torch.zeros(1, config.hidden_size))
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self.position_embedding = nn.Embedding(config.num_positions, config.hidden_size)
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def forward(self, images: torch.Tensor) -> torch.Tensor:
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"""
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Parameters:
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images : torch.Tensor
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Input image tensor with shape (B, C, H, W)
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Returns:
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torch.Tensor
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Transformed tensor with shape (B, L, D)
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"""
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images = images.to(device=self.proj.weight.device, dtype=self.proj.weight.dtype)
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x = self.proj(images)
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x = x.flatten(2).transpose(1, 2)
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cls_token = self.cls_embedding.expand(x.shape[0], -1, -1)
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x = torch.cat((cls_token, x), dim=1)
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x += self.position_embedding.weight.unsqueeze(0)
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return x
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class EVA2CLIPAttention(nn.Module):
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def __init__(
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self,
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config,
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quant_config: QuantizationConfig | None = None,
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prefix: str = "",
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):
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super().__init__()
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self.hidden_size = config.hidden_size
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self.tp_size = get_tensor_model_parallel_world_size()
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self.num_heads_per_rank = config.num_heads // self.tp_size
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self.head_dim = config.hidden_size // config.num_heads
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self.scale = self.head_dim**-0.5
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self.query_key_value = QKVParallelLinear(
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config.hidden_size,
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self.head_dim,
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config.num_heads,
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quant_config=quant_config,
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prefix=f"{prefix}.query_key_value",
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)
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self.dense = RowParallelLinear(
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config.hidden_size,
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config.hidden_size,
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quant_config=quant_config,
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prefix=f"{prefix}.dense",
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)
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self.attn = MultiHeadAttention(
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self.num_heads_per_rank, self.head_dim, self.scale
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)
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self.output_dropout = torch.nn.Dropout(config.dropout_prob)
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def forward(self, x: torch.Tensor) -> torch.Tensor:
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qkv, _ = self.query_key_value(x) # B, L, 3 * H * D
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q, k, v = qkv.chunk(3, dim=-1)
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out = self.attn(q, k, v)
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output, _ = self.dense(out)
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output = self.output_dropout(output)
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return output
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class EVA2CLIPMLP(nn.Module):
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def __init__(
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self,
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config,
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quant_config: QuantizationConfig | None = None,
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prefix: str = "",
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):
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super().__init__()
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self.config = config
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self.activation_fn = get_act_fn(config.hidden_act)
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self.fc1 = ColumnParallelLinear(
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config.hidden_size,
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config.intermediate_size,
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quant_config=quant_config,
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prefix=f"{prefix}.fc1",
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)
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self.fc2 = RowParallelLinear(
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config.intermediate_size,
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config.hidden_size,
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quant_config=quant_config,
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prefix=f"{prefix}.fc2",
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)
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def forward(self, x: torch.Tensor) -> torch.Tensor:
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x, _ = self.fc1(x)
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x = self.activation_fn(x)
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x, _ = self.fc2(x)
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return x
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class EVA2CLIPTransformerLayer(nn.Module):
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def __init__(
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self,
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config,
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quant_config: QuantizationConfig | None = None,
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prefix: str = "",
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):
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super().__init__()
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self.input_layernorm = LayerNorm(config.hidden_size, eps=config.layer_norm_eps)
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self.attention = EVA2CLIPAttention(
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config, quant_config=quant_config, prefix=f"{prefix}.attention"
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)
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self.mlp = EVA2CLIPMLP(
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config, quant_config=quant_config, prefix=f"{prefix}.mlp"
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)
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self.post_attention_layernorm = LayerNorm(
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config.hidden_size, eps=config.layer_norm_eps
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)
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def forward(self, hidden_states):
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attention_input = hidden_states
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attention_output = self.input_layernorm(self.attention(attention_input))
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hidden_states = attention_input + attention_output
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mlp_input = hidden_states
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mlp_output = self.post_attention_layernorm(self.mlp(mlp_input))
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output = mlp_input + mlp_output
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return output
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class EVA2CLIPTransformer(nn.Module):
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def __init__(
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self,
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config,
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quant_config: QuantizationConfig | None = None,
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prefix: str = "",
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):
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super().__init__()
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self.layers = nn.ModuleList(
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[
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EVA2CLIPTransformerLayer(
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config,
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quant_config=quant_config,
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prefix=f"{prefix}.layers.{layer_idx}",
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)
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for layer_idx in range(config.num_hidden_layers)
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]
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)
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def forward(self, hidden_states):
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for layer_module in self.layers:
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hidden_states = layer_module(hidden_states)
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return hidden_states
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class EVA2CLIPGLU(nn.Module):
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def __init__(
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self,
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config,
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in_features,
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quant_config: QuantizationConfig | None = None,
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prefix: str = "",
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):
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"""
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The original implementation is the same as:
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```python
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self.dense_h_to_4h = ColumnParallelLinear(
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config.hidden_size,
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config.ffn_hidden_size,
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bias=False,
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quant_config=quant_config,
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)
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self.gate_proj = ColumnParallelLinear(
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config.hidden_size,
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config.ffn_hidden_size,
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bias=False,
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quant_config=quant_config,
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)
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```
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```
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gate_proj_output, _ = self.gate_proj(x)
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dense_h_to_4h_output, _ = self.dense_h_to_4h(x)
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x = torch.cat([gate_proj_output, dense_h_to_4h_output], dim=-1)
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```
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We merge two ColumnParallelLinear into one MergedColumnParallelLinear:
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```
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self.merged_proj = MergedColumnParallelLinear(
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config.hidden_size,
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[config.ffn_hidden_size] * 2,
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bias=False,
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quant_config=quant_config,
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)
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```
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```
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x, _ = self.merged_proj(x)
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```
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"""
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super().__init__()
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self.linear_proj = ReplicatedLinear(
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in_features,
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config.hidden_size,
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bias=False,
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quant_config=quant_config,
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prefix=f"{prefix}.linear_proj",
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)
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self.norm1 = nn.LayerNorm(config.hidden_size)
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self.act1 = nn.GELU()
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self.act2 = SiluAndMul()
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self.merged_proj = MergedColumnParallelLinear(
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config.hidden_size,
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[config.ffn_hidden_size] * 2,
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bias=False,
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quant_config=quant_config,
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prefix=f"{prefix}.merged_proj",
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)
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self.dense_4h_to_h = RowParallelLinear(
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config.ffn_hidden_size,
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config.hidden_size,
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bias=False,
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quant_config=quant_config,
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prefix=f"{prefix}.dense_4h_to_h",
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)
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def forward(self, x):
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x, _ = self.linear_proj(x)
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x = self.act1(self.norm1(x))
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x, _ = self.merged_proj(x)
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x = self.act2(x)
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x, _ = self.dense_4h_to_h(x)
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return x
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class EVA2CLIPModel(nn.Module):
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def __init__(
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self,
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config,
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quant_config: QuantizationConfig | None = None,
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prefix: str = "",
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):
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super().__init__()
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vision_config = Namespace(**config.vision_config)
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self.patch_embedding = EVA2CLIPPatchEmbedding(vision_config)
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self.transformer = EVA2CLIPTransformer(
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vision_config, quant_config=quant_config, prefix=f"{prefix}.transformer"
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)
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self.linear_proj = EVA2CLIPGLU(
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config,
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in_features=config.hidden_size,
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quant_config=quant_config,
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prefix=f"{prefix}.linear_proj",
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)
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self.conv = Conv2dLayer(
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in_channels=vision_config.hidden_size,
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out_channels=config.hidden_size,
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kernel_size=2,
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stride=2,
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)
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self.boi = nn.Parameter(torch.zeros(1, 1, config.hidden_size))
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self.eoi = nn.Parameter(torch.zeros(1, 1, config.hidden_size))
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self.scaling_factor = vision_config.scaling_factor
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def forward(self, images: torch.Tensor) -> torch.Tensor:
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"""
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Parameters:
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images : torch.Tensor
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Input image tensor with shape (B, C, H, W)
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Returns:
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torch.Tensor
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Transformed tensor with shape (B, L, D)
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"""
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x = self.patch_embedding(images)
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x = self.transformer(x)
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x = x[:, 1:]
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b, s, h = x.shape
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grid_size = int(s**0.5)
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x = x.view(b, grid_size, grid_size, h).permute(0, 3, 1, 2)
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x = self.conv(x)
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x = x.flatten(2).transpose(1, 2)
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x = self.linear_proj(x)
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boi = self.boi.expand(x.shape[0], -1, -1)
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eoi = self.eoi.expand(x.shape[0], -1, -1)
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x = torch.cat((boi, x, eoi), dim=1)
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x = x / self.scaling_factor
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return x
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class GLM4VModel(ChatGLMModel):
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def __init__(self, *, vllm_config: VllmConfig, prefix: str = ""):
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super().__init__(vllm_config=vllm_config, prefix=prefix)
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quant_config = vllm_config.quant_config
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self.vision = EVA2CLIPModel(
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self.config, quant_config, prefix=f"{prefix}.vision"
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)
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class GLM4VProcessor:
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"""
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This model doesn't define its own HF processor,
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so we implement our own one here.
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"""
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def __init__(
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self,
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config: ChatGLMConfig,
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tokenizer: PreTrainedTokenizer,
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) -> None:
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super().__init__()
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self.config = config
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self.tokenizer = tokenizer
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vision_config = config.vision_config
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image_size = vision_config["image_size"]
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self.image_transform = transforms.Compose(
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[
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transforms.Resize(
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(image_size, image_size),
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interpolation=InterpolationMode.BICUBIC,
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),
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transforms.ToTensor(),
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transforms.Normalize(
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mean=(0.48145466, 0.4578275, 0.40821073),
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std=(0.26862954, 0.26130258, 0.27577711),
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),
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]
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)
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def __call__(
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self,
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text: TextInput | list[TextInput] | None = None,
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images: ImageInput | list[ImageInput] | None = None,
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return_tensors: str | TensorType | None = None,
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) -> BatchFeature:
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if text is None:
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text = []
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if not isinstance(text, list):
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text = [text]
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if images is None:
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images = []
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if not isinstance(images, list):
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images = [images]
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text_inputs = self.tokenizer(text)
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if len(images) == 0:
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image_inputs = {}
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else:
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pixel_values = [self.image_transform(image) for image in images]
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image_inputs = {"pixel_values": torch.stack(pixel_values)}
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return BatchFeature(
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{
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**text_inputs,
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**image_inputs,
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},
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tensor_type=return_tensors,
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)
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class GLM4VProcessingInfo(BaseProcessingInfo):
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def get_hf_config(self):
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return self.ctx.get_hf_config(ChatGLMConfig)
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def get_hf_processor(self, **kwargs: object) -> GLM4VProcessor:
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return self.ctx.init_processor(
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GLM4VProcessor,
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config=self.get_hf_config(),
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tokenizer=self.get_tokenizer(),
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**kwargs,
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)
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def get_supported_mm_limits(self) -> Mapping[str, int | None]:
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return {"image": 1}
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def get_num_image_tokens(self) -> int:
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hf_config = self.get_hf_config()
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vision_config = hf_config.vision_config
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image_size = vision_config["image_size"]
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patch_size = vision_config["patch_size"]
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grid_length = image_size // patch_size // 2
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return grid_length * grid_length
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def get_num_image_feature_tokens(self) -> int:
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# EVA2CLIPModel has embeddings for boi and eoi tokens as well
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return self.get_num_image_tokens() + 2
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|
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class GLM4VDummyInputsBuilder(BaseDummyInputsBuilder[GLM4VProcessingInfo]):
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def get_dummy_text(self, mm_counts: Mapping[str, int]) -> str:
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num_images = mm_counts.get("image", 0)
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base_text = "<|begin_of_image|><|endoftext|><|end_of_image|>"
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return base_text * num_images
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def get_dummy_mm_data(
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self,
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seq_len: int,
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mm_counts: Mapping[str, int],
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mm_options: Mapping[str, BaseDummyOptions] | None = None,
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) -> MultiModalDataDict:
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hf_config = self.info.get_hf_config()
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vision_config = hf_config.vision_config
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target_width = target_height = vision_config["image_size"]
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num_images = mm_counts.get("image", 0)
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image_overrides = mm_options.get("image") if mm_options else None
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return {
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"image": self._get_dummy_images(
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width=target_width,
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height=target_height,
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num_images=num_images,
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overrides=image_overrides,
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)
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}
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class GLM4VMultiModalProcessor(BaseMultiModalProcessor[GLM4VProcessingInfo]):
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def _hf_processor_applies_updates(
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self,
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prompt_text: str,
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mm_items: MultiModalDataItems,
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hf_processor_mm_kwargs: Mapping[str, object],
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tokenization_kwargs: Mapping[str, object],
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) -> bool:
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return False
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def _get_mm_fields_config(
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self,
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hf_inputs: BatchFeature,
|
|
hf_processor_mm_kwargs: Mapping[str, object],
|
|
) -> Mapping[str, MultiModalFieldConfig]:
|
|
return dict(pixel_values=MultiModalFieldConfig.batched("image"))
|
|
|
|
def _get_prompt_updates(
|
|
self,
|
|
mm_items: MultiModalDataItems,
|
|
hf_processor_mm_kwargs: Mapping[str, object],
|
|
out_mm_kwargs: MultiModalKwargsItems,
|
|
) -> Sequence[PromptUpdate]:
|
|
hf_config = self.info.get_hf_config()
|
|
|
|
boi_token_id = hf_config.boi_token_id
|
|
image_token_id = hf_config.pad_token_id
|
|
eoi_token_id = hf_config.eoi_token_id
|
|
|
|
def get_replacement(item_idx: int):
|
|
num_image_tokens = self.info.get_num_image_tokens()
|
|
image_tokens = [image_token_id] * num_image_tokens
|
|
|
|
return [boi_token_id] + image_tokens + [eoi_token_id]
|
|
|
|
return [
|
|
PromptReplacement(
|
|
modality="image",
|
|
target=[boi_token_id, image_token_id, eoi_token_id],
|
|
replacement=get_replacement,
|
|
),
|
|
]
|
|
|
|
|
|
@MULTIMODAL_REGISTRY.register_processor(
|
|
GLM4VMultiModalProcessor,
|
|
info=GLM4VProcessingInfo,
|
|
dummy_inputs=GLM4VDummyInputsBuilder,
|
|
)
|
|
class GLM4VForCausalLM(
|
|
ChatGLMBaseModel, SupportsMultiModal, SupportsLoRA, SupportsPP, SupportsMRoPE
|
|
):
|
|
merge_by_field_config = True
|
|
|
|
packed_modules_mapping = {
|
|
"query_key_value": ["query_key_value"],
|
|
"dense_h_to_4h": ["dense_h_to_4h"],
|
|
"merged_proj": ["gate_proj", "dense_h_to_4h"],
|
|
}
|
|
|
|
def get_mm_mapping(self) -> MultiModelKeys:
|
|
"""
|
|
Get the module prefix in multimodal models
|
|
"""
|
|
return MultiModelKeys.from_string_field(
|
|
language_model="transformer.encoder",
|
|
connector="transformer.vision.linear_proj",
|
|
tower_model="transformer.vision.transformer",
|
|
)
|
|
|
|
@classmethod
|
|
def get_placeholder_str(cls, modality: str, i: int) -> str | None:
|
|
if modality.startswith("image"):
|
|
return "<|begin_of_image|><|endoftext|><|end_of_image|>"
|
|
|
|
raise ValueError("Only image modality is supported")
|
|
|
|
def __init__(
|
|
self,
|
|
*,
|
|
vllm_config: VllmConfig,
|
|
prefix: str = "",
|
|
transformer_type: type[GLM4VModel] = GLM4VModel,
|
|
) -> None:
|
|
super().__init__(
|
|
vllm_config=vllm_config,
|
|
prefix=prefix,
|
|
transformer_type=transformer_type,
|
|
)
|
|
|
|
self.transformer: GLM4VModel
|
|
|
|
def _parse_and_validate_image_input(
|
|
self, **kwargs: object
|
|
) -> GLMVImagePixelInputs | None:
|
|
pixel_values = kwargs.pop("pixel_values", None)
|
|
|
|
if pixel_values is not None:
|
|
expected_h = expected_w = self.config.vision_config["image_size"]
|
|
return GLMVImagePixelInputs(
|
|
type="pixel_values",
|
|
data=pixel_values,
|
|
resolve_bindings={"h": expected_h, "w": expected_w},
|
|
)
|
|
|
|
return None
|
|
|
|
def _process_image_input(self, image_input: GLMVImagePixelInputs) -> torch.Tensor:
|
|
pixel_values = image_input["data"].to(dtype=self.config.dtype)
|
|
|
|
return self.transformer.vision(pixel_values)
|
|
|
|
def get_mrope_input_positions(
|
|
self,
|
|
input_tokens: list[int],
|
|
mm_features: list[MultiModalFeatureSpec],
|
|
) -> tuple[torch.Tensor, int]:
|
|
kwargs = MultiModalFeatureSpec.gather_kwargs(
|
|
mm_features,
|
|
{"image_grid_thw", "video_grid_thw"},
|
|
)
|
|
image_grid_thw = [item.tolist() for item in kwargs.get("image_grid_thw", [])]
|
|
video_grid_thw = [item.tolist() for item in kwargs.get("video_grid_thw", [])]
|
|
|
|
hf_config = self.config
|
|
image_token_id = hf_config.image_token_id
|
|
video_start_token_id = hf_config.video_start_token_id
|
|
video_end_token_id = hf_config.video_end_token_id
|
|
spatial_merge_size = hf_config.vision_config.spatial_merge_size
|
|
llm_pos_ids_list: list = []
|
|
|
|
if image_grid_thw or video_grid_thw:
|
|
input_token_type: list[str] = []
|
|
video_check_flg = False
|
|
for token in input_tokens:
|
|
if token == video_start_token_id:
|
|
video_check_flg = True
|
|
elif token == video_end_token_id:
|
|
video_check_flg = False
|
|
|
|
if (token == image_token_id) and (video_check_flg is False):
|
|
input_token_type.append("image")
|
|
elif (token == image_token_id) and (video_check_flg is True):
|
|
input_token_type.append("video")
|
|
else:
|
|
input_token_type.append("text")
|
|
|
|
input_type_group: list[tuple[str, int, int]] = []
|
|
for key, group_iter in itertools.groupby(
|
|
enumerate(input_token_type), lambda x: x[1]
|
|
):
|
|
group_list = list(group_iter)
|
|
start_index = group_list[0][0]
|
|
end_index = group_list[-1][0] + 1
|
|
input_type_group.append((key, start_index, end_index))
|
|
|
|
video_frame_num = 1
|
|
mm_data_idx = 0
|
|
for modality_type, start_idx, end_idx in input_type_group:
|
|
st_idx = (
|
|
llm_pos_ids_list[-1].max() + 1 if len(llm_pos_ids_list) > 0 else 0
|
|
)
|
|
if modality_type == "image":
|
|
t, h, w = image_grid_thw[mm_data_idx]
|
|
llm_grid_t, llm_grid_h, llm_grid_w = (
|
|
t,
|
|
h // spatial_merge_size,
|
|
w // spatial_merge_size,
|
|
)
|
|
|
|
t_index = (
|
|
torch.arange(llm_grid_t)
|
|
.view(-1, 1)
|
|
.expand(-1, llm_grid_h * llm_grid_w)
|
|
.flatten()
|
|
)
|
|
h_index = (
|
|
torch.arange(llm_grid_h)
|
|
.view(1, -1, 1)
|
|
.expand(llm_grid_t, -1, llm_grid_w)
|
|
.flatten()
|
|
)
|
|
w_index = (
|
|
torch.arange(llm_grid_w)
|
|
.view(1, 1, -1)
|
|
.expand(llm_grid_t, llm_grid_h, -1)
|
|
.flatten()
|
|
)
|
|
llm_pos_ids_list.append(
|
|
torch.stack([t_index, h_index, w_index]) + st_idx
|
|
)
|
|
mm_data_idx += 1
|
|
|
|
elif modality_type == "video":
|
|
t, h, w = (
|
|
video_frame_num,
|
|
*image_grid_thw[mm_data_idx][1:],
|
|
)
|
|
llm_grid_t, llm_grid_h, llm_grid_w = (
|
|
t,
|
|
h // spatial_merge_size,
|
|
w // spatial_merge_size,
|
|
)
|
|
|
|
for t_idx in range(llm_grid_t):
|
|
t_index = (
|
|
torch.tensor(t_idx)
|
|
.view(-1, 1)
|
|
.expand(-1, llm_grid_h * llm_grid_w)
|
|
.flatten()
|
|
)
|
|
h_index = (
|
|
torch.arange(llm_grid_h)
|
|
.view(1, -1, 1)
|
|
.expand(1, -1, llm_grid_w)
|
|
.flatten()
|
|
)
|
|
w_index = (
|
|
torch.arange(llm_grid_w)
|
|
.view(1, 1, -1)
|
|
.expand(1, llm_grid_h, -1)
|
|
.flatten()
|
|
)
|
|
llm_pos_ids_list.append(
|
|
torch.stack([t_index, h_index, w_index]) + st_idx
|
|
)
|
|
|
|
mm_data_idx += 1
|
|
video_frame_num += 1
|
|
|
|
else:
|
|
text_len = end_idx - start_idx
|
|
llm_pos_ids_list.append(
|
|
torch.arange(text_len).view(1, -1).expand(3, -1) + st_idx
|
|
)
|
|
video_frame_num = 1
|
|
|
|
else:
|
|
text_len = len(input_tokens)
|
|
llm_pos_ids_list.append(torch.arange(text_len).view(1, -1).expand(3, -1))
|
|
|
|
llm_positions = torch.cat(llm_pos_ids_list, dim=1).reshape(3, -1)
|
|
mrope_position_delta = (llm_positions.max() + 1 - len(input_tokens)).item()
|
|
return llm_positions, mrope_position_delta
|
|
|
|
def get_language_model(self) -> torch.nn.Module:
|
|
return self.transformer
|
|
|
|
embed_input_ids = SupportsMultiModal.embed_input_ids
|
|
|
|
def embed_multimodal(self, **kwargs: object) -> MultiModalEmbeddings:
|
|
image_input = self._parse_and_validate_image_input(**kwargs)
|
|
if image_input is None:
|
|
return []
|
|
|
|
vision_embeddings = self._process_image_input(image_input)
|
|
return vision_embeddings
|
|
|
|
def forward(
|
|
self,
|
|
input_ids: torch.Tensor,
|
|
positions: torch.Tensor,
|
|
intermediate_tensors: IntermediateTensors | None = None,
|
|
inputs_embeds: torch.Tensor | None = None,
|
|
**kwargs: object,
|
|
) -> torch.Tensor | IntermediateTensors:
|
|
if intermediate_tensors is not None:
|
|
inputs_embeds = None
|
|
|
|
hidden_states = self.transformer(
|
|
input_ids, positions, intermediate_tensors, inputs_embeds
|
|
)
|
|
|
|
return hidden_states
|