Upload configuration_ovis.py

configuration_ovis.py

@@ -0,0 +1,204 @@
+from abc import ABC, abstractmethod
+from typing import List, Dict, Union, Optional
+
+from transformers import PretrainedConfig, AutoConfig, AutoModel
+from .configuration_aimv2 import AIMv2Config
+from .modeling_aimv2 import AIMv2Model
+
+IGNORE_ID = -100
+IMAGE_TOKEN_ID = -200
+IMAGE_TOKEN = "<image>"
+IMAGE_ATOM_ID = -300
+IMAGE_INDICATOR_IDS = [-301, -302, -303, -304, -305]
+
+AutoConfig.register("aimv2", AIMv2Config)
+AutoModel.register(AIMv2Config, AIMv2Model)
+
+# ----------------------------------------------------------------------
+#                     Visual Tokenizer Configuration
+# ----------------------------------------------------------------------
+class BaseVisualTokenizerConfig(PretrainedConfig):
+    def __init__(
+        self,
+        vocab_size=16384,
+        tokenize_function="softmax",
+        tau=1.0,
+        depths=None,
+        drop_cls_token=False,
+        backbone_config: Optional[Union[PretrainedConfig, dict]] = None,
+        hidden_stride: int = 1,
+        **kwargs
+    ):
+        super().__init__(**kwargs)
+        self.vocab_size = vocab_size
+        self.tokenize_function = tokenize_function
+        self.tau = tau
+        if isinstance(depths, str):
+            depths = [int(x) for x in depths.split('|')]
+        self.depths = depths
+        self.backbone_kwargs = {}
+        self.drop_cls_token = drop_cls_token
+        if backbone_config is not None:
+            assert isinstance(backbone_config, (PretrainedConfig, dict)), \
+                f"expect `backbone_config` to be instance of PretrainedConfig or dict, but got {type(backbone_config)} type"
+            if not isinstance(backbone_config, PretrainedConfig):
+                model_type = backbone_config['model_type']
+                backbone_config.pop('model_type')
+                backbone_config = AutoConfig.for_model(model_type, **backbone_config)
+        self.backbone_config = backbone_config
+        self.hidden_stride = hidden_stride
+
+
+class Aimv2VisualTokenizerConfig(BaseVisualTokenizerConfig):
+    model_type = "aimv2_visual_tokenizer"
+
+    def __init__(self, **kwargs):
+        super().__init__(**kwargs)
+        if self.drop_cls_token:
+            self.drop_cls_token = False
+        if self.depths:
+            assert len(self.depths) == 1
+            self.backbone_kwargs['num_hidden_layers'] = self.depths[0]
+
+
+AutoConfig.register("aimv2_visual_tokenizer", Aimv2VisualTokenizerConfig)
+
+
+# ----------------------------------------------------------------------
+#                           Ovis Configuration
+# ----------------------------------------------------------------------
+class OvisConfig(PretrainedConfig):
+    model_type = "ovis"
+
+    def __init__(
+        self,
+        llm_config: Optional[Union[PretrainedConfig, dict]] = None,
+        visual_tokenizer_config: Optional[Union[PretrainedConfig, dict]] = None,
+        multimodal_max_length=8192,
+        hidden_size=None,
+        conversation_formatter_class=None,
+        llm_attn_implementation=None,
+        disable_tie_weight=False,
+        **kwargs
+    ):
+        super().__init__(**kwargs)
+        if llm_config is not None:
+            assert isinstance(llm_config, (PretrainedConfig, dict)), \
+                f"expect `llm_config` to be instance of PretrainedConfig or dict, but got {type(llm_config)} type"
+            if not isinstance(llm_config, PretrainedConfig):
+                model_type = llm_config['model_type']
+                llm_config.pop('model_type')
+                llm_config = AutoConfig.for_model(model_type, **llm_config)
+        self.llm_config = llm_config
+        if visual_tokenizer_config is not None:
+            assert isinstance(visual_tokenizer_config, (PretrainedConfig, dict)), \
+                f"expect `visual_tokenizer_config` to be instance of PretrainedConfig or dict, but got {type(visual_tokenizer_config)} type"
+            if not isinstance(visual_tokenizer_config, PretrainedConfig):
+                model_type = visual_tokenizer_config['model_type']
+                visual_tokenizer_config.pop('model_type')
+                visual_tokenizer_config = AutoConfig.for_model(model_type, **visual_tokenizer_config)
+        self.visual_tokenizer_config = visual_tokenizer_config
+        self.multimodal_max_length = multimodal_max_length
+        self.hidden_size = hidden_size
+        self.conversation_formatter_class = conversation_formatter_class
+        self.llm_attn_implementation = llm_attn_implementation
+        self.disable_tie_weight = disable_tie_weight
+
+
+# ----------------------------------------------------------------------
+#                         Conversation Formatter
+# ----------------------------------------------------------------------
+class ConversationFormatter(ABC):
+    support_tokenizer_types = None
+
+    def __init__(self, tokenizer):
+        tokenizer_type = type(tokenizer).__name__
+        assert tokenizer_type in self.support_tokenizer_types, \
+            f'Invalid tokenizer type, expected one from `{self.support_tokenizer_types}`, but got `{tokenizer_type}`'
+        self.tokenizer = tokenizer
+        self.image_token = IMAGE_TOKEN
+        self.image_token_id = IMAGE_TOKEN_ID
+        self.ignore_id = IGNORE_ID
+
+    def _tokenize_with_image_symbol(self, text):
+        text_chunks = [self.tokenizer(chunk, add_special_tokens=False).input_ids for chunk in
+                       text.split(self.image_token)]
+        token_ids = []
+        num_chuck = len(text_chunks)
+        for i, chunk in enumerate(text_chunks):
+            token_ids.extend(chunk)
+            if i < num_chuck - 1:
+                token_ids.append(self.image_token_id)
+        return token_ids
+
+    @abstractmethod
+    def format(self, conversations: List[Dict], generation_preface=None):
+        pass
+
+    @abstractmethod
+    def format_query(self, query, generation_preface=""):
+        pass
+
+
+class QwenConversationFormatter(ConversationFormatter):
+    support_tokenizer_types = ['QWenTokenizer', 'Qwen2TokenizerFast']
+
+    def __init__(self, tokenizer):
+        super().__init__(tokenizer)
+        self.from2role = {
+            "system": "<|im_start|>system\n",
+            "human": "<|im_start|>user\n",
+            "gpt": "<|im_start|>assistant\n",
+        }
+        self.gpt_token_num = None
+        self.im_end = "<|im_end|>\n"
+        self.default_system_prompt = "You are a helpful assistant."
+
+    def format(self, conversations: List[Dict], generation_preface=None):
+        if self.gpt_token_num is None:
+            self.gpt_token_num = len(self.tokenizer(self.from2role["gpt"], add_special_tokens=False).input_ids)
+
+        if conversations[0]["from"] != "system":
+            conversations.insert(0, {
+                "from": "system",
+                "value": self.default_system_prompt
+            })
+
+        if generation_preface is not None:
+            conversations.append({
+                "from": "gpt",
+                "value": generation_preface
+            })
+
+        prompt = ""
+        input_ids = []
+        labels = []
+        num_conversation = len(conversations)
+        for i, conversation in enumerate(conversations):
+            frm = conversation["from"]
+            role = self.from2role[frm]
+            message = conversation["value"]
+            text = role + message
+            if i < num_conversation - 1 or generation_preface is None:
+                text += self.im_end
+            prompt += text
+            token_ids = self._tokenize_with_image_symbol(text)
+            input_ids.extend(token_ids)
+            label_ids = [self.ignore_id] * len(token_ids)
+            if frm == "gpt" and generation_preface is None:
+                # learning `\n` following `im_end` is meaningless, so the last `\n` token is ignored in label
+                label_ids[self.gpt_token_num:-1] = token_ids[self.gpt_token_num:-1]
+            labels.extend(label_ids)
+
+        assert self._tokenize_with_image_symbol(prompt) == input_ids
+        assert len(input_ids) == len(labels)
+
+        return prompt, input_ids, labels
+
+    def format_query(self, query, generation_preface=""):
+        prompt, input_ids, _ = self.format([{
+            "from": "human",
+            "value": query
+        }], generation_preface=generation_preface)
+
+        return prompt, input_ids