Upload projector/modeling_projector.py with huggingface_hub

projector/modeling_projector.py

@@ -0,0 +1,51 @@
+# Copyright (c) OpenMMLab. All rights reserved.
+import torch
+import torch.nn as nn
+from transformers import PreTrainedModel
+from transformers.activations import ACT2FN
+
+from .configuration_projector import ProjectorConfig
+
+
+class ProjectorModel(PreTrainedModel):
+    _auto_class = 'AutoModel'
+    config_class = ProjectorConfig
+    base_model_prefix = 'model'
+    supports_gradient_checkpointing = True
+
+    def __init__(self, config: ProjectorConfig) -> None:
+        super().__init__(config)
+        self.gradient_checkpointing = False
+
+        modules = [
+            nn.Linear(
+                config.visual_hidden_size,
+                config.llm_hidden_size,
+                bias=config.bias)
+        ]
+        for _ in range(1, config.depth):
+            modules.append(ACT2FN[config.hidden_act])
+            modules.append(
+                nn.Linear(
+                    config.llm_hidden_size,
+                    config.llm_hidden_size,
+                    bias=config.bias))
+        self.model = nn.Sequential(*modules)
+
+    def enable_input_require_grads(self):
+
+        def make_inputs_require_grad(module, input, output):
+            output.requires_grad_(True)
+
+        self.model.register_forward_hook(make_inputs_require_grad)
+
+    def _set_gradient_checkpointing(self, module, value=False):
+        if isinstance(module, ProjectorModel):
+            module.gradient_checkpointing = value
+
+    def forward(self, x):
+        if self.gradient_checkpointing and self.training:
+            layer_outputs = torch.utils.checkpoint.checkpoint(self.model, x)
+        else:
+            layer_outputs = self.model(x)
+        return layer_outputs