[Bugfix] Cleanup Pixtral HF code (#11333)

Signed-off-by: DarkLight1337 <tlleungac@connect.ust.hk>

vllm/model_executor/models/pixtral.py

@@ -10,12 +10,12 @@ from mistral_common.protocol.instruct.messages import ImageChunk
 from PIL import Image
 from transformers import PixtralVisionConfig
 from transformers.models.pixtral.image_processing_pixtral import (
-    _num_image_tokens)
+    _num_image_tokens as _get_pixtral_hf_num_image_tokens)
 from transformers.models.pixtral.modeling_pixtral import (
     PixtralRotaryEmbedding, apply_rotary_pos_emb, position_ids_in_meshgrid)
 
 from vllm.attention import AttentionMetadata
-from vllm.config import ModelConfig, VllmConfig
+from vllm.config import VllmConfig
 from vllm.distributed import divide, get_tensor_model_parallel_world_size
 from vllm.inputs import (INPUT_REGISTRY, DecoderOnlyInputs, DummyData,
                          InputContext, token_inputs)
@@ -27,7 +27,6 @@ from vllm.model_executor.layers.linear import (MergedColumnParallelLinear,
 from vllm.model_executor.layers.quantization import QuantizationConfig
 from vllm.model_executor.layers.sampler import SamplerOutput, get_sampler
 from vllm.model_executor.model_loader.weight_utils import default_weight_loader
-from vllm.model_executor.models.utils import merge_multimodal_embeddings
 from vllm.model_executor.sampling_metadata import SamplingMetadata
 from vllm.multimodal import MULTIMODAL_REGISTRY, MultiModalKwargs
 from vllm.multimodal.inputs import NestedTensors, PlaceholderRange
@@ -35,11 +34,10 @@ from vllm.multimodal.utils import (cached_get_tokenizer,
                                    consecutive_placeholder_ranges,
                                    resolve_visual_encoder_outputs)
 from vllm.sequence import IntermediateTensors, SequenceData
-from vllm.transformers_utils.processor import cached_get_processor
-from vllm.utils import is_list_of
 
 from .interfaces import SupportsMultiModal, SupportsPP
-from .utils import init_vllm_registered_model, maybe_prefix
+from .utils import (init_vllm_registered_model, maybe_prefix,
+                    merge_multimodal_embeddings)
 
 try:
     from xformers import ops as xops
@@ -699,37 +697,14 @@ def get_pixtral_hf_num_patches(*, image_size: int, patch_size: int) -> int:
     return grid_length * grid_length
 
 
-def get_max_pixtral_hf_image_feature_size(
-        hf_config: PixtralVisionConfig) -> int:
-    return get_pixtral_hf_num_patches(image_size=hf_config.image_size,
-                                      patch_size=hf_config.patch_size)
-
-
 def get_max_pixtral_hf_image_tokens(hf_config: PixtralVisionConfig) -> int:
-    return get_max_pixtral_hf_image_feature_size(hf_config)
+    grid_length = get_pixtral_hf_patch_grid_length(
+        image_size=hf_config.image_size,
+        patch_size=hf_config.patch_size,
+    )
 
-
-def dummy_seq_data_for_pixtral_hf(
-        hf_config: PixtralVisionConfig,
-        seq_len: int,
-        num_images: int,
-        *,
-        image_token_id: int,
-        image_feature_size_override: Optional[int] = None,
-        mm_key: str = "image"):
-    if image_feature_size_override is None:
-        image_feature_size = get_max_pixtral_hf_image_feature_size(hf_config)
-    else:
-        image_feature_size = image_feature_size_override
-
-    return SequenceData.from_prompt_token_counts(
-        (image_token_id, image_feature_size * num_images),
-        (0, seq_len - image_feature_size * num_images),
-    ), {
-        mm_key:
-        consecutive_placeholder_ranges(num_items=num_images,
-                                       item_size=image_feature_size)
-    }
+    # Consider the image_break_token
+    return (grid_length + 1) * grid_length
 
 
 def dummy_image_for_pixtral_hf(
@@ -763,116 +738,14 @@ def get_pixtral_hf_image_feature_size(hf_config: PixtralVisionConfig,
         image_width = int(numpy.ceil(image_width / ratio))
         image_height = int(numpy.ceil(image_height / ratio))
 
-    num_height_tokens, num_width_tokens = _num_image_tokens(
-        (image_height, image_width), (patch_height, patch_width))
+    num_height_tokens, num_width_tokens = _get_pixtral_hf_num_image_tokens(
+        (image_height, image_width),
+        (patch_height, patch_width),
+    )
 
     return num_width_tokens, num_height_tokens
 
 
-def input_processor_for_pixtral_hf(
-    model_config: ModelConfig,
-    hf_config: PixtralVisionConfig,
-    inputs: DecoderOnlyInputs,
-    *,
-    image_token_id: int,
-    image_feature_size_override: Optional[Union[int, List[int]]] = None,
-) -> DecoderOnlyInputs:
-    assert image_feature_size_override is None, (
-        "image_feature_size_override is not supported for Pixtral")
-
-    multi_modal_data = inputs.get("multi_modal_data")
-    if multi_modal_data is None or "image" not in multi_modal_data:
-        return inputs
-
-    processor = cached_get_processor(model_config.model)
-
-    image_data = multi_modal_data["image"]
-    if isinstance(image_data, Image.Image):
-        image_data = [image_data]
-    elif not is_list_of(image_data, Image.Image):
-        raise TypeError(f"Invalid image type: {type(image_data)}")
-
-    new_prompt = inputs.get("prompt")
-    new_token_ids = inputs["prompt_token_ids"]
-
-    image_token = processor.image_token
-    image_break_token = processor.image_break_token
-    image_end_token = processor.image_end_token
-
-    # Update new_prompt if present
-    if new_prompt:
-        parts = new_prompt.split(image_token)
-        assert len(parts) - 1 == len(image_data)
-        new_parts = [parts[0]]  # Start with the part before any image tokens
-
-        for image, next_part in zip(image_data, parts[1:]):
-            w, h = image.size
-            (num_width_tokens,
-             num_height_tokens) = get_pixtral_hf_image_feature_size(
-                 hf_config, image_width=w, image_height=h)
-
-            replace_tokens = [image_token] * num_width_tokens + [
-                image_break_token
-            ]
-            replace_tokens = replace_tokens * num_height_tokens
-            replace_tokens[-1] = image_end_token
-
-            new_parts.append("".join(replace_tokens))
-            new_parts.append(next_part)
-
-        new_prompt = "".join(new_parts)
-
-    # Update new_token_ids
-    convert_tokens_to_ids = processor.tokenizer.convert_tokens_to_ids
-    image_token_id = convert_tokens_to_ids(image_token)
-    image_break_id = convert_tokens_to_ids(image_break_token)
-    image_end_id = convert_tokens_to_ids(image_end_token)
-    placeholder_token_id = -999
-    # Find all image token indices at once
-    placeholder_indices = [
-        idx for idx, token_id in enumerate(new_token_ids)
-        if token_id == image_token_id
-    ]
-    assert len(placeholder_indices) == len(image_data)
-    replace_tokens_list = []
-    for placeholder_idx, image in zip(placeholder_indices, image_data):
-        new_token_ids[placeholder_idx] = placeholder_token_id
-
-        w, h = image.size
-        (num_width_tokens,
-         num_height_tokens) = get_pixtral_hf_image_feature_size(hf_config,
-                                                                image_width=w,
-                                                                image_height=h)
-
-        replace_tokens = [image_token_id] * num_width_tokens + [image_break_id]
-        replace_tokens = replace_tokens * num_height_tokens
-        replace_tokens[-1] = image_end_id
-        replace_tokens_list.append(replace_tokens)
-
-    reverse_offsets: List[int] = []
-    # Backward iteration for replacement without affecting known indices
-    for placeholder_idx, replace_tokens in zip(reversed(placeholder_indices),
-                                               reversed(replace_tokens_list)):
-        reverse_offsets.append(
-            len(new_token_ids) - placeholder_idx + len(replace_tokens))
-        new_token_ids[placeholder_idx:placeholder_idx + 1] = replace_tokens
-
-    placeholder_ranges: List[PlaceholderRange] = []
-    for reverse_offset, replace_tokens in zip(reversed(reverse_offsets),
-                                              replace_tokens_list):
-        placeholder_ranges.append(
-            PlaceholderRange(
-                offset=len(new_token_ids) - reverse_offset,
-                length=len(replace_tokens),
-            ))
-
-    # NOTE: Create a defensive copy of the original inputs
-    return token_inputs(prompt_token_ids=new_token_ids,
-                        prompt=new_prompt,
-                        multi_modal_data=multi_modal_data,
-                        multi_modal_placeholders={"image": placeholder_ranges})
-
-
 class PixtralHFMLP(nn.Module):
 
     def __init__(