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# Copyright 2023 Haotian Liu | |
# | |
# 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. | |
from abc import ABC, abstractmethod | |
import torch | |
import torch.nn as nn | |
from .multimodal_encoder.builder import build_vision_tower | |
from .multimodal_projector.builder import build_vision_projector | |
from minigemini.constants import IGNORE_INDEX, IMAGE_TOKEN_INDEX, DEFAULT_IMAGE_PATCH_TOKEN, DEFAULT_IM_START_TOKEN, DEFAULT_IM_END_TOKEN | |
class LlavaMetaModel: | |
def __init__(self, config): | |
super(LlavaMetaModel, self).__init__(config) | |
if hasattr(config, "mm_vision_tower"): | |
self.vision_tower = build_vision_tower(config, delay_load=True) | |
self.mm_projector = build_vision_projector(config) | |
def get_vision_tower(self): | |
vision_tower = getattr(self, 'vision_tower', None) | |
if type(vision_tower) is list: | |
vision_tower = vision_tower[0] | |
return vision_tower | |
def initialize_vision_modules(self, model_args, fsdp=None): | |
vision_tower = model_args.vision_tower | |
mm_vision_select_layer = model_args.mm_vision_select_layer | |
mm_vision_select_feature = model_args.mm_vision_select_feature | |
pretrain_mm_mlp_adapter = model_args.pretrain_mm_mlp_adapter | |
self.config.mm_vision_tower = vision_tower | |
if self.get_vision_tower() is None: | |
vision_tower = build_vision_tower(model_args) | |
if fsdp is not None and len(fsdp) > 0: | |
self.vision_tower = [vision_tower] | |
else: | |
self.vision_tower = vision_tower | |
else: | |
if fsdp is not None and len(fsdp) > 0: | |
vision_tower = self.vision_tower[0] | |
else: | |
vision_tower = self.vision_tower | |
vision_tower.load_model() | |
self.config.use_mm_proj = True | |
self.config.mm_projector_type = getattr(model_args, 'mm_projector_type', 'linear') | |
self.config.mm_hidden_size = vision_tower.hidden_size | |
self.config.mm_vision_select_layer = mm_vision_select_layer | |
self.config.mm_vision_select_feature = mm_vision_select_feature | |
if getattr(self, 'mm_projector', None) is None: | |
self.mm_projector = build_vision_projector(self.config) | |
else: | |
# In case it is frozen by LoRA | |
for p in self.mm_projector.parameters(): | |
p.requires_grad = True | |
if pretrain_mm_mlp_adapter is not None: | |
mm_projector_weights = torch.load(pretrain_mm_mlp_adapter, map_location='cpu') | |
def get_w(weights, keyword): | |
return {k.split(keyword + '.')[1]: v for k, v in weights.items() if keyword in k} | |
if 'model' in mm_projector_weights.keys(): | |
mm_projector_weights = mm_projector_weights['model'] | |
status = self.mm_projector.load_state_dict(mm_projector_weights, strict=False) | |
print('missing_keys:', status.missing_keys) | |
else: | |
status = self.mm_projector.load_state_dict(get_w(mm_projector_weights, 'mm_projector'), strict=False) | |
print('missing_keys:', status.missing_keys) | |
# class_embedding_weights = get_w(mm_projector_weights, 'model.vision_tower.vision_tower.vision_model.embeddings') | |
# if len(class_embedding_weights) > 0: | |
# self.vision_tower.vision_tower.vision_model.embeddings.load_state_dict(class_embedding_weights, strict=False) | |
class LlavaMetaForCausalLM(ABC): | |
def get_model(self): | |
pass | |
def get_vision_tower(self): | |
return self.get_model().get_vision_tower() | |
def encode_images(self, images=None, points=None): | |
if images is not None: | |
image_features = self.get_model().get_vision_tower()(images) | |
image_features = self.get_model().mm_projector(image_features) | |
if points is not None: | |
# use pre-computed features here | |
point_features = [self.get_model().mm_projector(_point).squeeze() for _point in points] | |
return image_features | |
def prepare_inputs_labels_for_multimodal( | |
self, input_ids, position_ids, attention_mask, past_key_values, labels, images=None, points=None | |
): | |
vision_tower = self.get_vision_tower() | |
if vision_tower is None or images is None or input_ids.shape[1] == 1: | |
if past_key_values is not None and vision_tower is not None and images is not None and input_ids.shape[1] == 1: | |
target_shape = past_key_values[-1][-1].shape[-2] + 1 | |
attention_mask = torch.cat((attention_mask, torch.ones( | |
(attention_mask.shape[0], target_shape - attention_mask.shape[1]), | |
dtype=attention_mask.dtype, | |
device=attention_mask.device | |
)), dim=1) | |
position_ids = torch.sum(attention_mask, dim=1).unsqueeze(-1) - 1 | |
return input_ids, position_ids, attention_mask, past_key_values, None, labels | |
if type(images) is list or images.ndim == 5: | |
concat_images = torch.cat([image for image in images], dim=0) | |
image_features = self.encode_images(concat_images) | |
split_sizes = [image.shape[0] for image in images] | |
image_features = torch.split(image_features, split_sizes, dim=0) | |
image_features = [x.flatten(0, 1).to(self.device) for x in image_features] | |
else: | |
image_features = self.encode_images(images).to(self.device) | |
# TODO: image start / end is not implemented here to support pretraining. | |
if getattr(self.config, 'tune_mm_mlp_adapter', False) and getattr(self.config, 'mm_use_im_start_end', False): | |
raise NotImplementedError | |
# Let's just add dummy tensors if they do not exist, | |
# it is a headache to deal with None all the time. | |
# But it is not ideal, and if you have a better idea, | |
# please open an issue / submit a PR, thanks. | |
_labels = labels | |
_position_ids = position_ids | |
_attention_mask = attention_mask | |
if attention_mask is None: | |
attention_mask = torch.ones_like(input_ids, dtype=torch.bool) | |
else: | |
attention_mask = attention_mask.bool() | |
if position_ids is None: | |
position_ids = torch.arange(0, input_ids.shape[1], dtype=torch.long, device=input_ids.device) | |
if labels is None: | |
labels = torch.full_like(input_ids, IGNORE_INDEX) | |
# remove the padding using attention_mask -- TODO: double check | |
input_ids = [cur_input_ids[cur_attention_mask] for cur_input_ids, cur_attention_mask in zip(input_ids, attention_mask)] | |
labels = [cur_labels[cur_attention_mask] for cur_labels, cur_attention_mask in zip(labels, attention_mask)] | |
new_input_embeds = [] | |
new_labels = [] | |
cur_image_idx = 0 | |
for batch_idx, cur_input_ids in enumerate(input_ids): | |
num_images = (cur_input_ids == IMAGE_TOKEN_INDEX).sum() | |
if num_images == 0: | |
cur_image_features = image_features[cur_image_idx] | |
cur_input_embeds_1 = self.get_model().embed_tokens(cur_input_ids) | |
cur_input_embeds = torch.cat([cur_input_embeds_1, cur_image_features[0:0]], dim=0) | |
new_input_embeds.append(cur_input_embeds) | |
new_labels.append(labels[batch_idx]) | |
cur_image_idx += 1 | |
continue | |
image_token_indices = [-1] + torch.where(cur_input_ids == IMAGE_TOKEN_INDEX)[0].tolist() + [cur_input_ids.shape[0]] | |
cur_input_ids_noim = [] | |
cur_labels = labels[batch_idx] | |
cur_labels_noim = [] | |
for i in range(len(image_token_indices) - 1): | |
cur_input_ids_noim.append(cur_input_ids[image_token_indices[i]+1:image_token_indices[i+1]]) | |
cur_labels_noim.append(cur_labels[image_token_indices[i]+1:image_token_indices[i+1]]) | |
split_sizes = [x.shape[0] for x in cur_labels_noim] | |
cur_input_embeds = self.get_model().embed_tokens(torch.cat(cur_input_ids_noim)) | |
cur_input_embeds_no_im = torch.split(cur_input_embeds, split_sizes, dim=0) | |
cur_new_input_embeds = [] | |
cur_new_labels = [] | |
for i in range(num_images + 1): | |
cur_new_input_embeds.append(cur_input_embeds_no_im[i]) | |
cur_new_labels.append(cur_labels_noim[i]) | |
if i < num_images: | |
cur_image_features = image_features[cur_image_idx] | |
cur_image_idx += 1 | |
cur_new_input_embeds.append(cur_image_features) | |
cur_new_labels.append(torch.full((cur_image_features.shape[0],), IGNORE_INDEX, device=cur_labels.device, dtype=cur_labels.dtype)) | |
cur_new_input_embeds = [x.to(self.device) for x in cur_new_input_embeds] | |
cur_new_input_embeds = torch.cat(cur_new_input_embeds) | |
cur_new_labels = torch.cat(cur_new_labels) | |
new_input_embeds.append(cur_new_input_embeds) | |
new_labels.append(cur_new_labels) | |
# Truncate sequences to max length as image embeddings can make the sequence longer | |
tokenizer_model_max_length = getattr(self.config, 'tokenizer_model_max_length', None) | |
if tokenizer_model_max_length is not None: | |
new_input_embeds = [x[:tokenizer_model_max_length] for x in new_input_embeds] | |
new_labels = [x[:tokenizer_model_max_length] for x in new_labels] | |
# Combine them | |
max_len = max(x.shape[0] for x in new_input_embeds) | |
batch_size = len(new_input_embeds) | |
new_input_embeds_padded = [] | |
new_labels_padded = torch.full((batch_size, max_len), IGNORE_INDEX, dtype=new_labels[0].dtype, device=new_labels[0].device) | |
attention_mask = torch.zeros((batch_size, max_len), dtype=attention_mask.dtype, device=attention_mask.device) | |
position_ids = torch.zeros((batch_size, max_len), dtype=position_ids.dtype, device=position_ids.device) | |
for i, (cur_new_embed, cur_new_labels) in enumerate(zip(new_input_embeds, new_labels)): | |
cur_len = cur_new_embed.shape[0] | |
if getattr(self.config, 'tokenizer_padding_side', 'right') == "left": | |
new_input_embeds_padded.append(torch.cat(( | |
torch.zeros((max_len - cur_len, cur_new_embed.shape[1]), dtype=cur_new_embed.dtype, device=cur_new_embed.device), | |
cur_new_embed | |
), dim=0)) | |
if cur_len > 0: | |
new_labels_padded[i, -cur_len:] = cur_new_labels | |
attention_mask[i, -cur_len:] = True | |
position_ids[i, -cur_len:] = torch.arange(0, cur_len, dtype=position_ids.dtype, device=position_ids.device) | |
else: | |
new_input_embeds_padded.append(torch.cat(( | |
cur_new_embed, | |
torch.zeros((max_len - cur_len, cur_new_embed.shape[1]), dtype=cur_new_embed.dtype, device=cur_new_embed.device) | |
), dim=0)) | |
if cur_len > 0: | |
new_labels_padded[i, :cur_len] = cur_new_labels | |
attention_mask[i, :cur_len] = True | |
position_ids[i, :cur_len] = torch.arange(0, cur_len, dtype=position_ids.dtype, device=position_ids.device) | |
new_input_embeds = torch.stack(new_input_embeds_padded, dim=0) | |
if _labels is None: | |
new_labels = None | |
else: | |
new_labels = new_labels_padded | |
if _attention_mask is None: | |
attention_mask = None | |
else: | |
attention_mask = attention_mask.to(dtype=_attention_mask.dtype) | |
if _position_ids is None: | |
position_ids = None | |
return None, position_ids, attention_mask, past_key_values, new_input_embeds, new_labels | |
def initialize_vision_tokenizer(self, model_args, tokenizer): | |
if model_args.mm_use_im_patch_token: | |
tokenizer.add_tokens([DEFAULT_IMAGE_PATCH_TOKEN], special_tokens=True) | |
self.resize_token_embeddings(len(tokenizer)) | |
if model_args.mm_use_im_start_end: | |
num_new_tokens = tokenizer.add_tokens([DEFAULT_IM_START_TOKEN, DEFAULT_IM_END_TOKEN], special_tokens=True) | |
self.resize_token_embeddings(len(tokenizer)) | |
if num_new_tokens > 0: | |
input_embeddings = self.get_input_embeddings().weight.data | |
output_embeddings = self.get_output_embeddings().weight.data | |
input_embeddings_avg = input_embeddings[:-num_new_tokens].mean( | |
dim=0, keepdim=True) | |
output_embeddings_avg = output_embeddings[:-num_new_tokens].mean( | |
dim=0, keepdim=True) | |
input_embeddings[-num_new_tokens:] = input_embeddings_avg | |
output_embeddings[-num_new_tokens:] = output_embeddings_avg | |
if model_args.tune_mm_mlp_adapter: | |
for p in self.get_input_embeddings().parameters(): | |
p.requires_grad = True | |
for p in self.get_output_embeddings().parameters(): | |
p.requires_grad = False | |
if model_args.pretrain_mm_mlp_adapter: | |
mm_projector_weights = torch.load(model_args.pretrain_mm_mlp_adapter, map_location='cpu') | |
embed_tokens_weight = mm_projector_weights['model.embed_tokens.weight'] | |
assert num_new_tokens == 2 | |
if input_embeddings.shape == embed_tokens_weight.shape: | |
input_embeddings[-num_new_tokens:] = embed_tokens_weight[-num_new_tokens:] | |
elif embed_tokens_weight.shape[0] == num_new_tokens: | |
input_embeddings[-num_new_tokens:] = embed_tokens_weight | |
else: | |
raise ValueError(f"Unexpected embed_tokens_weight shape. Pretrained: {embed_tokens_weight.shape}. Current: {input_embeddings.shape}. Numer of new tokens: {num_new_tokens}.") | |
elif model_args.mm_use_im_patch_token: | |
if model_args.tune_mm_mlp_adapter: | |
for p in self.get_input_embeddings().parameters(): | |
p.requires_grad = False | |
for p in self.get_output_embeddings().parameters(): | |
p.requires_grad = False |