qwen3_vl.py 63.3 KB
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# SPDX-License-Identifier: Apache-2.0
# SPDX-FileCopyrightText: Copyright contributors to the vLLM project

# Copyright 2025 The vLLM team.
# Copyright 2025 The Qwen Team.
# Copyright 2025 The HuggingFace Inc. team.
# All rights reserved.
#
# This code is based on EleutherAI's GPT-NeoX library and the GPT-NeoX
# and OPT implementations in this library. It has been modified from its
# original forms to accommodate minor architectural differences compared
# to GPT-NeoX and OPT used by the Meta AI team that trained the model.
#
# 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.
"""Inference-only Qwen3VL model compatible with HuggingFace weights."""
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import math
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from collections.abc import Callable, Iterable, Mapping, Sequence
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from functools import partial
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from itertools import islice
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from typing import Any
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import numpy as np
import torch
import torch.nn as nn
import torch.nn.functional as F
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from transformers import BatchFeature
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from transformers.models.qwen2_vl import Qwen2VLImageProcessorFast
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from transformers.models.qwen2_vl.image_processing_qwen2_vl import (
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    smart_resize as image_smart_resize,
)
from transformers.models.qwen3_vl import Qwen3VLProcessor, Qwen3VLVideoProcessor
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from transformers.models.qwen3_vl.configuration_qwen3_vl import (
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    Qwen3VLConfig,
    Qwen3VLVisionConfig,
)
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from transformers.models.qwen3_vl.video_processing_qwen3_vl import (
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    smart_resize as video_smart_resize,
)
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from transformers.video_utils import VideoMetadata

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from vllm.attention.backends.registry import AttentionBackendEnum
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from vllm.attention.layer import check_upstream_fa_availability
from vllm.compilation.decorators import support_torch_compile
from vllm.config import VllmConfig
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from vllm.config.multimodal import BaseDummyOptions, VideoDummyOptions
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from vllm.distributed import get_pp_group
from vllm.logger import init_logger
from vllm.model_executor.layers.activation import _ACTIVATION_REGISTRY
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from vllm.model_executor.layers.linear import (
    ColumnParallelLinear,
    ReplicatedLinear,
    RowParallelLinear,
)
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from vllm.model_executor.layers.logits_processor import LogitsProcessor
from vllm.model_executor.layers.quantization import QuantizationConfig
from vllm.model_executor.layers.vocab_parallel_embedding import ParallelLMHead
from vllm.model_executor.model_loader.weight_utils import default_weight_loader
from vllm.model_executor.models.module_mapping import MultiModelKeys
from vllm.multimodal import MULTIMODAL_REGISTRY
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from vllm.multimodal.inputs import (
    MultiModalDataDict,
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    MultiModalFeatureSpec,
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    MultiModalFieldConfig,
    MultiModalKwargsItem,
    MultiModalKwargsItems,
    VideoItem,
)
from vllm.multimodal.parse import ImageSize, MultiModalDataItems, MultiModalDataParser
from vllm.multimodal.processing import (
    BaseMultiModalProcessor,
    PromptReplacement,
    PromptUpdate,
    PromptUpdateDetails,
)
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from vllm.multimodal.profiling import BaseDummyInputsBuilder
from vllm.sequence import IntermediateTensors
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from vllm.utils.collection_utils import is_list_of
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from .interfaces import (
    MultiModalEmbeddings,
    SupportsLoRA,
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    SupportsMRoPE,
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    SupportsMultiModal,
    SupportsPP,
)
from .qwen2_5_vl import (
    Qwen2_5_VisionAttention,
    Qwen2_5_VisionRotaryEmbedding,
    Qwen2_5_VLImageEmbeddingInputs,
    Qwen2_5_VLImageInputs,
    Qwen2_5_VLImagePixelInputs,
    Qwen2_5_VLVideoEmbeddingInputs,
    Qwen2_5_VLVideoInputs,
    Qwen2_5_VLVideoPixelInputs,
)
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from .qwen2_vl import Qwen2VLProcessingInfo
from .qwen3 import Qwen3ForCausalLM, Qwen3Model
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from .utils import (
    AutoWeightsLoader,
    PPMissingLayer,
    WeightsMapper,
    _merge_multimodal_embeddings,
    maybe_prefix,
)
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from .vision import (
    conv3d_to_linear_weight,
    get_vit_attn_backend,
    run_dp_sharded_mrope_vision_model,
)
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logger = init_logger(__name__)

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# Official recommended max pixels is 24576 * 32 * 32
_MAX_FRAMES_PER_VIDEO = 24576

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class Qwen3_VisionPatchEmbed(nn.Module):
    def __init__(
        self,
        patch_size: int = 14,
        temporal_patch_size: int = 2,
        in_channels: int = 3,
        hidden_size: int = 1152,
    ) -> None:
        super().__init__()
        self.patch_size = patch_size
        self.temporal_patch_size = temporal_patch_size
        self.hidden_size = hidden_size

        kernel_size = (temporal_patch_size, patch_size, patch_size)
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        self.proj = ReplicatedLinear(
            in_channels * math.prod(kernel_size),
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            hidden_size,
            bias=True,
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            return_bias=False,
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        )
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    def forward(self, x: torch.Tensor) -> torch.Tensor:
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        x = self.proj(x)
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        return x


class Qwen3_VisionMLP(nn.Module):
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    def __init__(
        self,
        in_features: int,
        hidden_features: int,
        bias: bool = False,
        act_fn: Callable[[torch.Tensor], torch.Tensor] = F.silu,
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        quant_config: QuantizationConfig | None = None,
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        prefix: str = "",
        use_data_parallel: bool = False,
    ):
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        super().__init__()
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        self.linear_fc1 = ColumnParallelLinear(
            in_features,
            hidden_features,
            bias=bias,
            quant_config=quant_config,
            return_bias=False,
            prefix=f"{prefix}.linear_fc1",
            disable_tp=use_data_parallel,
        )
        self.linear_fc2 = RowParallelLinear(
            hidden_features,
            in_features,
            bias=bias,
            quant_config=quant_config,
            return_bias=False,
            prefix=f"{prefix}.linear_fc2",
            disable_tp=use_data_parallel,
        )
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        self.act_fn = act_fn

    def forward(self, x: torch.Tensor):
        mlp_output = self.linear_fc2(self.act_fn(self.linear_fc1(x)))
        return mlp_output


class Qwen3_VisionBlock(nn.Module):
    def __init__(
        self,
        dim: int,
        num_heads: int,
        mlp_hidden_dim: int,
        act_fn: Callable[[torch.Tensor], torch.Tensor] = F.silu,
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        norm_layer: Callable[[int], nn.Module] | None = None,
        quant_config: QuantizationConfig | None = None,
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        prefix: str = "",
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        use_data_parallel: bool = False,
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        attn_backend: AttentionBackendEnum = AttentionBackendEnum.TORCH_SDPA,
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        use_upstream_fa: bool = False,
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    ) -> None:
        super().__init__()
        if norm_layer is None:
            norm_layer = partial(nn.LayerNorm, eps=1e-6)
        self.norm1 = norm_layer(dim)
        self.norm2 = norm_layer(dim)
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        self.attn = Qwen2_5_VisionAttention(
            embed_dim=dim,
            num_heads=num_heads,
            projection_size=dim,
            quant_config=quant_config,
            prefix=f"{prefix}.attn",
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            use_data_parallel=use_data_parallel,
            attn_backend=attn_backend,
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            use_upstream_fa=use_upstream_fa,
        )
        self.mlp = Qwen3_VisionMLP(
            dim,
            mlp_hidden_dim,
            act_fn=act_fn,
            bias=True,
            quant_config=quant_config,
            prefix=f"{prefix}.mlp",
            use_data_parallel=use_data_parallel,
        )
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    def forward(
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        self,
        x: torch.Tensor,
        cu_seqlens: torch.Tensor,
        rotary_pos_emb: torch.Tensor,
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        max_seqlen: torch.Tensor,  # Only used for Flash Attention
        seqlens: torch.Tensor,  # Only used for xFormers
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    ) -> torch.Tensor:
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        x = x + self.attn(
            self.norm1(x),
            cu_seqlens=cu_seqlens,
            rotary_pos_emb=rotary_pos_emb,
            max_seqlen=max_seqlen,
            seqlens=seqlens,
        )
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        x = x + self.mlp(self.norm2(x))
        return x


class Qwen3_VisionPatchMerger(nn.Module):
    def __init__(
        self,
        d_model: int,
        context_dim: int,
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        norm_layer: Callable[[int], nn.Module] | None = None,
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        spatial_merge_size: int = 2,
        use_postshuffle_norm: bool = False,
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        quant_config: QuantizationConfig | None = None,
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        prefix: str = "",
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        use_data_parallel: bool = False,
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    ) -> None:
        super().__init__()
        self.hidden_size = context_dim * (spatial_merge_size**2)

        self.use_postshuffle_norm = use_postshuffle_norm
        if self.use_postshuffle_norm:
            context_dim = self.hidden_size

        if norm_layer is None:
            norm_layer = partial(nn.LayerNorm, eps=1e-6)
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        self.norm = norm_layer(context_dim)
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        self.linear_fc1 = ColumnParallelLinear(
            self.hidden_size,
            self.hidden_size,
            bias=True,
            quant_config=quant_config,
            prefix=f"{prefix}.linear_fc1",
            disable_tp=use_data_parallel,
        )
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        self.act_fn = nn.GELU()
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        self.linear_fc2 = RowParallelLinear(
            self.hidden_size,
            d_model,
            bias=True,
            quant_config=quant_config,
            prefix=f"{prefix}.linear_fc2",
            disable_tp=use_data_parallel,
        )
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    def forward(self, x: torch.Tensor) -> torch.Tensor:
        if self.use_postshuffle_norm:
            x = self.norm(x.view(-1, self.hidden_size))
        else:
            x = self.norm(x).view(-1, self.hidden_size)

        x_parallel, _ = self.linear_fc1(x)
        x_parallel = self.act_fn(x_parallel)
        out, _ = self.linear_fc2(x_parallel)
        return out


class Qwen3_VisionTransformer(nn.Module):
    def __init__(
        self,
        vision_config: Qwen3VLVisionConfig,
        norm_eps: float = 1e-6,
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        quant_config: QuantizationConfig | None = None,
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        prefix: str = "",
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        use_data_parallel: bool = False,
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        attn_backend_override: AttentionBackendEnum | None = None,
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    ) -> None:
        super().__init__()
        self.hidden_size = vision_config.hidden_size
        self.num_heads = vision_config.num_heads
        self.num_position_embeddings = vision_config.num_position_embeddings
        self.patch_size = vision_config.patch_size
        self.spatial_merge_size = vision_config.spatial_merge_size
        self.spatial_merge_unit = self.spatial_merge_size**2
        self.temporal_patch_size = vision_config.temporal_patch_size
        self.deepstack_visual_indexes = vision_config.deepstack_visual_indexes
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        self.use_data_parallel = use_data_parallel
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        self.num_grid_per_side = int(self.num_position_embeddings**0.5)
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        # NOTE: This is used for creating empty tensor for all_gather for
        # DP ViT. Here out_hidden_size is enlarged due to deepstack
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        self.out_hidden_size = vision_config.out_hidden_size * (
            1 + len(self.deepstack_visual_indexes)
        )
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        self.patch_embed = Qwen3_VisionPatchEmbed(
            patch_size=self.patch_size,
            temporal_patch_size=self.temporal_patch_size,
            in_channels=vision_config.in_channels,
            hidden_size=self.hidden_size,
        )

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        self.pos_embed = nn.Embedding(self.num_position_embeddings, self.hidden_size)
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        norm_layer = partial(nn.LayerNorm, eps=norm_eps)
        head_dim = self.hidden_size // self.num_heads
        self.rotary_pos_emb = Qwen2_5_VisionRotaryEmbedding(head_dim // 2)

        self.merger = Qwen3_VisionPatchMerger(
            d_model=vision_config.out_hidden_size,
            context_dim=self.hidden_size,
            norm_layer=norm_layer,
            spatial_merge_size=self.spatial_merge_size,
            quant_config=quant_config,
            prefix=f"{prefix}.merger",
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            use_data_parallel=use_data_parallel,
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        )

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        self.deepstack_merger_list = nn.ModuleList(
            [
                Qwen3_VisionPatchMerger(
                    d_model=vision_config.out_hidden_size,
                    context_dim=self.hidden_size,
                    spatial_merge_size=self.spatial_merge_size,
                    use_postshuffle_norm=True,
                    norm_layer=norm_layer,
                    quant_config=quant_config,
                    prefix=f"{prefix}.deepstack_merger_list.{layer_idx}",
                    use_data_parallel=use_data_parallel,
                )
                for layer_idx in range(len(self.deepstack_visual_indexes))
            ]
        )
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        self.attn_backend = get_vit_attn_backend(
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            head_size=head_dim,
            dtype=torch.get_default_dtype(),
            attn_backend_override=attn_backend_override,
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        )
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        use_upstream_fa = False
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        if (
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            self.attn_backend != AttentionBackendEnum.FLASH_ATTN
            and self.attn_backend != AttentionBackendEnum.ROCM_AITER_FA
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            and check_upstream_fa_availability(torch.get_default_dtype())
        ):
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            self.attn_backend = AttentionBackendEnum.FLASH_ATTN
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            use_upstream_fa = True

        if self.attn_backend not in {
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            AttentionBackendEnum.FLASH_ATTN,
            AttentionBackendEnum.TORCH_SDPA,
            AttentionBackendEnum.XFORMERS,
            AttentionBackendEnum.ROCM_AITER_FA,
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        }:
            raise RuntimeError(
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                f"Qwen3-VL does not support {self.attn_backend} backend now."
            )
        self.blocks = nn.ModuleList(
            [
                Qwen3_VisionBlock(
                    dim=self.hidden_size,
                    num_heads=self.num_heads,
                    mlp_hidden_dim=vision_config.intermediate_size,
                    act_fn=_ACTIVATION_REGISTRY[vision_config.hidden_act],
                    norm_layer=norm_layer,
                    quant_config=quant_config,
                    prefix=f"{prefix}.blocks.{layer_idx}",
                    use_data_parallel=use_data_parallel,
                    attn_backend=self.attn_backend,
                    use_upstream_fa=use_upstream_fa,
                )
                for layer_idx in range(vision_config.depth)
            ]
        )
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    @property
    def dtype(self) -> torch.dtype:
        return self.patch_embed.proj.weight.dtype

    @property
    def device(self) -> torch.device:
        return self.patch_embed.proj.weight.device

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    def rot_pos_emb(self, grid_thw: list[list[int]]):
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        pos_ids = []
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        max_grid_size = max(max(h, w) for _, h, w in grid_thw)
        for t, h, w in grid_thw:
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            hpos_ids = torch.arange(h).unsqueeze(1).expand(-1, w)
            hpos_ids = hpos_ids.reshape(
                h // self.spatial_merge_size,
                self.spatial_merge_size,
                w // self.spatial_merge_size,
                self.spatial_merge_size,
            )
            hpos_ids = hpos_ids.permute(0, 2, 1, 3)
            hpos_ids = hpos_ids.flatten()

            wpos_ids = torch.arange(w).unsqueeze(0).expand(h, -1)
            wpos_ids = wpos_ids.reshape(
                h // self.spatial_merge_size,
                self.spatial_merge_size,
                w // self.spatial_merge_size,
                self.spatial_merge_size,
            )
            wpos_ids = wpos_ids.permute(0, 2, 1, 3)
            wpos_ids = wpos_ids.flatten()
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            pos_ids.append(torch.stack([hpos_ids, wpos_ids], dim=-1).repeat(t, 1))
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        pos_ids = torch.cat(pos_ids, dim=0)
        rotary_pos_emb_full = self.rotary_pos_emb(max_grid_size)
        rotary_pos_emb = rotary_pos_emb_full[pos_ids].flatten(1)
        return rotary_pos_emb

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    def fast_pos_embed_interpolate(self, grid_thw: list[list[int]]) -> torch.Tensor:
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        num_grid_per_side = self.num_grid_per_side
        m_size = self.spatial_merge_size
        hidden_dim = self.pos_embed.embedding_dim
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        outputs = []
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        for t, h, w in grid_thw:
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            h_idxs = torch.linspace(
                0, num_grid_per_side - 1, h, dtype=torch.float32, device=self.device
            )
            w_idxs = torch.linspace(
                0, num_grid_per_side - 1, w, dtype=torch.float32, device=self.device
            )
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            h_floor = h_idxs.to(torch.long)
            w_floor = w_idxs.to(torch.long)
            h_ceil = torch.clamp(h_floor + 1, max=num_grid_per_side - 1)
            w_ceil = torch.clamp(w_floor + 1, max=num_grid_per_side - 1)

            dh = h_idxs - h_floor
            dw = w_idxs - w_floor

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            # Create meshgrid view for all h, w vars
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            dh_grid, dw_grid = torch.meshgrid(dh, dw, indexing="ij")
            h_floor_grid, w_floor_grid = torch.meshgrid(h_floor, w_floor, indexing="ij")
            h_ceil_grid, w_ceil_grid = torch.meshgrid(h_ceil, w_ceil, indexing="ij")
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            # original computation of weights
            # w00 = (1 - dh_grid) * (1 - dw_grid)
            # w01 = (1 - dh_grid) * dw_grid
            # w10 = dh_grid * (1 - dw_grid)
            # w11 = dh_grid * dw_grid
            # we reuse w11 here to avoid duplicate
            # dh_grid * dw_grid computation
            w11 = dh_grid * dw_grid
            w10 = dh_grid - w11
            w01 = dw_grid - w11
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            w00 = 1 - dh_grid - w01
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            h_grid = torch.stack([h_floor_grid, h_floor_grid, h_ceil_grid, h_ceil_grid])
            w_grid = torch.stack([w_floor_grid, w_ceil_grid, w_floor_grid, w_ceil_grid])
            h_grid_idx = h_grid * num_grid_per_side
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            indices = (h_grid_idx + w_grid).reshape(4, -1)
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            weights = torch.stack([w00, w01, w10, w11], dim=0).reshape(4, -1, 1)
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            weights = weights.to(dtype=self.dtype)
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            embeds = self.pos_embed(indices)
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            embeds *= weights
            combined = embeds.sum(dim=0)
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            combined = combined.reshape(
                h // m_size, m_size, w // m_size, m_size, hidden_dim
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            )
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            combined = combined.permute(0, 2, 1, 3, 4).reshape(1, -1, hidden_dim)
            repeated = combined.expand(t, -1, -1).reshape(-1, hidden_dim)
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            outputs.append(repeated)

        return torch.cat(outputs, dim=0)
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    def compute_attn_mask_seqlen(
        self,
        cu_seqlens: torch.Tensor,
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    ) -> tuple[torch.Tensor, torch.Tensor]:
        max_seqlen = torch.zeros([], device=cu_seqlens.device)
        seqlens = torch.zeros(1, device=cu_seqlens.device)
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        if (
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            self.attn_backend == AttentionBackendEnum.FLASH_ATTN
            or self.attn_backend == AttentionBackendEnum.ROCM_AITER_FA
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        ):
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            max_seqlen = (cu_seqlens[1:] - cu_seqlens[:-1]).max()
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        elif self.attn_backend == AttentionBackendEnum.XFORMERS:
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            seqlens = cu_seqlens[1:] - cu_seqlens[:-1]
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        return max_seqlen, seqlens

    def forward(
        self,
        x: torch.Tensor,
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        grid_thw: torch.Tensor | list[list[int]],
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    ) -> torch.Tensor:
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        hidden_states = x.to(device=self.device, dtype=self.dtype, non_blocking=True)
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        hidden_states = self.patch_embed(hidden_states)

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        if isinstance(grid_thw, list):
            grid_thw_list = grid_thw
            grid_thw = torch.tensor(grid_thw, dtype=torch.int32)
        else:
            grid_thw_list = grid_thw.tolist()

        pos_embeds = self.fast_pos_embed_interpolate(grid_thw_list)
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        hidden_states = hidden_states + pos_embeds
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        rotary_pos_emb = self.rot_pos_emb(grid_thw_list)
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        rotary_pos_emb = rotary_pos_emb.to(hidden_states.device, non_blocking=True)
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        cu_seqlens = torch.repeat_interleave(
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            grid_thw[:, 1] * grid_thw[:, 2], grid_thw[:, 0]
        ).cumsum(dim=0, dtype=grid_thw.dtype if torch.jit.is_tracing() else torch.int32)
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        cu_seqlens = torch.cat([cu_seqlens.new_zeros(1), cu_seqlens])
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        hidden_states = hidden_states.unsqueeze(1)
        max_seqlen, seqlens = self.compute_attn_mask_seqlen(cu_seqlens)
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        cu_seqlens = cu_seqlens.to(self.device, non_blocking=True)
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        deepstack_feature_lists = []
        for layer_num, blk in enumerate(self.blocks):
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            hidden_states = blk(
                hidden_states,
                cu_seqlens=cu_seqlens,
                rotary_pos_emb=rotary_pos_emb,
                max_seqlen=max_seqlen,
                seqlens=seqlens,
            )
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            if layer_num in self.deepstack_visual_indexes:
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                deepstack_merger_idx = self.deepstack_visual_indexes.index(layer_num)
                deepstack_feature = self.deepstack_merger_list[deepstack_merger_idx](
                    hidden_states
                )
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                deepstack_feature_lists.append(deepstack_feature)
        hidden_states = self.merger(hidden_states)
        hidden_states = torch.cat(
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            [hidden_states] + deepstack_feature_lists, dim=1
        )  # [seq_len, hidden_size * (1 + depth_of_deepstack)]
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        return hidden_states

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    def load_weights(self, weights: Iterable[tuple[str, torch.Tensor]]) -> set[str]:
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        stacked_params_mapping = [
            # (param_name, shard_name, shard_id)
            ("attn.qkv.", "attn.q.", "q"),
            ("attn.qkv.", "attn.k.", "k"),
            ("attn.qkv.", "attn.v.", "v"),
        ]
        params_dict = dict(self.named_parameters(remove_duplicate=False))
        loaded_params: set[str] = set()

        for name, loaded_weight in weights:
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            if name.endswith("patch_embed.proj.weight"):
                loaded_weight = conv3d_to_linear_weight(loaded_weight)

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            for param_name, weight_name, shard_id in stacked_params_mapping:
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                if weight_name not in name:
                    continue
                name = name.replace(weight_name, param_name)

                param = params_dict[name]
                weight_loader = param.weight_loader
                weight_loader(param, loaded_weight, shard_id)
                break
            else:
                param = params_dict[name]
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                weight_loader = getattr(param, "weight_loader", default_weight_loader)
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                weight_loader(param, loaded_weight)
            loaded_params.add(name)
        return loaded_params


class Qwen3VLProcessingInfo(Qwen2VLProcessingInfo):
    def get_hf_config(self):
        return self.ctx.get_hf_config(Qwen3VLConfig)

    def get_hf_processor(self, **kwargs: object) -> Qwen3VLProcessor:
        return self.ctx.get_hf_processor(
            Qwen3VLProcessor,
            use_fast=kwargs.pop("use_fast", True),
            **kwargs,
        )

    def get_tokenizer(self):
        return self.ctx.tokenizer

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    def get_image_processor(self, **kwargs: object) -> Qwen2VLImageProcessorFast:
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        return self.get_hf_processor(**kwargs).image_processor

    def get_video_processor(self, **kwargs: object) -> Qwen3VLVideoProcessor:
        return self.get_hf_processor(**kwargs).video_processor

    def _get_vision_info(
        self,
        *,
        image_width: int,
        image_height: int,
        num_frames: int = 2,
        do_resize: bool = True,
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        image_processor: Qwen2VLImageProcessorFast | Qwen3VLVideoProcessor | None,
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    ) -> tuple[ImageSize, int]:
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        if image_processor is None and num_frames > 1:
            image_processor = self.get_video_processor()
        elif image_processor is None:
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            image_processor = self.get_image_processor()

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        is_video = isinstance(image_processor, Qwen3VLVideoProcessor)

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        hf_config = self.get_hf_config()
        vision_config = hf_config.vision_config
        patch_size = vision_config.patch_size
        merge_size = vision_config.spatial_merge_size
        temporal_patch_size = vision_config.temporal_patch_size

        if do_resize:
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            if is_video:
                smart_resize = video_smart_resize
                extra_kwargs = {
                    "num_frames": num_frames,
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                    "temporal_factor": temporal_patch_size,
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                }
            else:
                smart_resize = image_smart_resize
                extra_kwargs = {}
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            resized_height, resized_width = smart_resize(
                height=image_height,
                width=image_width,
                factor=patch_size * merge_size,
                min_pixels=image_processor.size["shortest_edge"],
                max_pixels=image_processor.size["longest_edge"],
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                **extra_kwargs,
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            )
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            preprocessed_size = ImageSize(width=resized_width, height=resized_height)
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        else:
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            preprocessed_size = ImageSize(width=image_width, height=image_height)
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        padded_num_frames = num_frames + num_frames % temporal_patch_size

        grid_t = max(padded_num_frames // temporal_patch_size, 1)
        grid_h = preprocessed_size.height // patch_size
        grid_w = preprocessed_size.width // patch_size

        num_patches = grid_t * grid_h * grid_w
        num_vision_tokens = num_patches // (merge_size**2)

        return preprocessed_size, num_vision_tokens

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    def _get_max_video_frames(self, max_tokens: int, start_num_frames: int = 2) -> int:
        return super()._get_max_video_frames(
            max_tokens, start_num_frames=start_num_frames
        )
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    def get_num_frames_with_most_features(
        self,
        seq_len: int,
        mm_counts: Mapping[str, int],
    ) -> int:
        return super().get_num_frames_with_most_features(
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            seq_len, mm_counts, max_frames_per_video=_MAX_FRAMES_PER_VIDEO
        )
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    def get_max_video_tokens(
        self,
        seq_len: int,
        mm_counts: Mapping[str, int],
    ) -> int:
        target_width, target_height = self.get_image_size_with_most_features()
        video_soft_tokens = self.get_num_video_tokens(
            image_width=target_width,
            image_height=target_height,
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            num_frames=self.get_num_frames_with_most_features(seq_len, mm_counts),
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            image_processor=None,
        )

        # NOTE: By default in Qwen3-VL, one video token is converted to
        # "<{timestamp} seconds>" (on average 9.5 tokens) + vision_start_token + video_token + vision_end_token # noqa: E501
        formatted_video_soft_tokens = video_soft_tokens * 12.5
        return int(formatted_video_soft_tokens)

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    def _calculate_timestamps(
        self, indices: list[int] | torch.Tensor, video_fps: float, merge_size: int
    ):
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        if not isinstance(indices, list):
            indices = indices.tolist()
        if len(indices) % merge_size != 0:
            # don't update metadata's frames_indices directly
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            indices = indices + [indices[-1]] * (merge_size - len(indices) % merge_size)
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        timestamps = [idx / video_fps for idx in indices]
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        timestamps = [
            (timestamps[i] + timestamps[i + merge_size - 1]) / 2
            for i in range(0, len(timestamps), merge_size)
        ]
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        return timestamps

    def _get_video_second_idx(
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        self,
        metadata: dict[str, Any],
        out_item: MultiModalKwargsItem,
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        do_sample_frames: bool | None = None,
        sampled_fps: float | None = None,
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    ) -> list[int]:
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        video_processor = self.get_video_processor()
        merge_size = video_processor.merge_size
        indices = metadata["frames_indices"]

        # metadata["fps"] refers to the true fps of the input video.
        video_fps = metadata["fps"]
        if do_sample_frames is None:
            do_sample_frames = metadata.get("do_sample_frames", False)

        # If video frames are sampled in HF processor (instead of vLLM
        # video loader), we need to re-calculate the indices from original
        # metadata.
        if do_sample_frames:
            # here video_fps is the fps of the sampled video, and
            # metadata["fps"] refers to the fps of the original video.
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            sampled_fps = sampled_fps if sampled_fps else video_processor.fps
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            total_num_frames = metadata["total_num_frames"]
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            num_frames = int(total_num_frames / metadata["fps"] * sampled_fps)
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            num_frames = min(
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                min(
                    max(num_frames, video_processor.min_frames),
                    video_processor.max_frames,
                ),
                total_num_frames,
            )
            indices = (
                np.linspace(0, total_num_frames - 1, num_frames)
                .round()
                .astype(int)
                .tolist()
            )
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        timestamps = self._calculate_timestamps(indices, video_fps, merge_size)
        return timestamps


class Qwen3VLDummyInputsBuilder(BaseDummyInputsBuilder[Qwen3VLProcessingInfo]):
    def get_dummy_text(self, mm_counts: Mapping[str, int]) -> str:
        num_images = mm_counts.get("image", 0)
        num_videos = mm_counts.get("video", 0)

        image_token = "<|vision_start|><|image_pad|><|vision_end|>"
        video_token = "<|vision_start|><|video_pad|><|vision_end|>"

        return image_token * num_images + video_token * num_videos

    def get_dummy_mm_data(
        self,
        seq_len: int,
        mm_counts: Mapping[str, int],
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        mm_options: Mapping[str, BaseDummyOptions] | None = None,
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    ) -> MultiModalDataDict:
        num_images = mm_counts.get("image", 0)
        num_videos = mm_counts.get("video", 0)
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        image_overrides = mm_options.get("image") if mm_options else None
        video_overrides = mm_options.get("video") if mm_options else None
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        target_width, target_height = self.info.get_image_size_with_most_features()
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        target_num_frames = self.info.get_num_frames_with_most_features(
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            seq_len, mm_counts
        )
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        if video_overrides:
            assert isinstance(video_overrides, VideoDummyOptions)
            num_frames_override = video_overrides.num_frames
            if num_frames_override:
                if num_frames_override > target_num_frames:
                    logger.warning(
                        "video.num_frames override (%d) exceeds model's "
                        "maximum number of frames (%d), will be ignored",
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                        num_frames_override,
                        target_num_frames,
                    )
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                if num_frames_override < 2:
                    logger.warning(
                        "video.num_frames override (%d) cannot be less "
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                        "than 2, will be ignored",
                        num_frames_override,
                    )
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                target_num_frames = min(target_num_frames, num_frames_override)
        target_num_frames = max(target_num_frames, 2)

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        target_video_size, _ = self.info._get_vision_info(
            image_width=target_width,
            image_height=target_height,
            num_frames=target_num_frames,
            image_processor=self.info.get_video_processor(),
        )
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        # NOTE: we need to do this check here since Qwen3-VL resizes video
        # frames depending on how many frames there are.
        width, height = target_video_size.width, target_video_size.height
        if video_overrides:
            assert isinstance(video_overrides, VideoDummyOptions)
            width_override = video_overrides.width
            if width_override:
                if width_override > width:
                    logger.warning(
                        "video.width override (%d) exceeds model's "
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                        "maximum width (%d), will be ignored",
                        width_override,
                        width,
                    )
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                width = min(width, width_override)
            height_override = video_overrides.height
            if height_override:
                if height_override > height:
                    logger.warning(
                        "video.height override (%d) exceeds model's "
                        "maximum height (%d), will be ignored",
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                        height_override,
                        height,
                    )
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                height = min(height, height_override)
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        return {
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            "image": self._get_dummy_images(
                width=target_width,
                height=target_height,
                num_images=num_images,
                overrides=image_overrides,
            ),
            "video": self._get_dummy_videos(
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                width=width,
                height=height,
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                num_frames=target_num_frames,
                num_videos=num_videos,
            ),
        }

    def _get_dummy_videos(
        self,
        *,
        width: int,
        height: int,
        num_frames: int,
        num_videos: int,
    ) -> list[VideoItem]:
        video = np.full((num_frames, width, height, 3), 255, dtype=np.uint8)
        video_items = []
        for i in range(num_videos):
            video_metadata = {
                "fps": 2.0,
                "duration": num_frames / 2.0,
                "total_num_frames": num_frames,
                "frames_indices": [i for i in range(num_frames)],
                "video_backend": "opencv",
                "do_sample_frames": False,
            }
            video_item = (video.copy(), video_metadata)
            video_items.append(video_item)
        return video_items


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class Qwen3VLMultiModalProcessor(BaseMultiModalProcessor[Qwen3VLProcessingInfo]):
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    def _get_data_parser(self) -> MultiModalDataParser:
        return MultiModalDataParser(video_needs_metadata=True)

    def _call_hf_processor(
        self,
        prompt: str,
        mm_data: Mapping[str, object],
        mm_kwargs: Mapping[str, object],
        tok_kwargs: Mapping[str, object],
    ) -> BatchFeature:
        mm_data = dict(mm_data)
        processor = self.info.get_hf_processor(**mm_kwargs)

        # Separate video processing from image processing. Because the videos
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        # are processed into several image patches
        if videos := mm_data.pop("videos", []):
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            video_grid_thw_lst = []
            pixel_values_videos_lst = []

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            for item in videos:
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                video_array, metadata = item

                # NOTE: @JJJYmmm new attr metadata.frames_indices indicates
                # the sampled frames indices of pre-sampled videos, which is
                # used to calculate the timestamps. Make sure that
                # do_sample_frames in mm_kwargs is false for presampled videos.

                # NOTE: a copy of is created to update do_sample_frames,
                # otherwise mm_hash for the object will be incorrect.
                video_mm_kwargs = dict(**mm_kwargs)
                if "do_sample_frames" not in video_mm_kwargs:
                    # qwen_vl_utils already has "do_sample_frames" in
                    # mm_kwargs, don't overwrite it.
                    video_mm_kwargs["do_sample_frames"] = metadata.get(
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                        "do_sample_frames", False
                    )
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                metadata = VideoMetadata(
                    **{k: metadata[k] for k in metadata if k != "do_sample_frames"}
                )
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                video_mm_data = dict()
                video_mm_data["videos"] = [[video_array]]
                video_mm_data["video_metadata"] = [[metadata]]

                video_outputs = super()._call_hf_processor(
                    prompt="<|vision_start|><|video_pad|><|vision_end|>",
                    mm_data=video_mm_data,
                    mm_kwargs=video_mm_kwargs,
                    tok_kwargs=tok_kwargs,
                )
                input_ids = video_outputs.pop("input_ids")
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                video_placeholder = processor.tokenizer.batch_decode(input_ids)[0]
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                prompt = prompt.replace(
                    "<|vision_start|><|video_pad|><|vision_end|>",
                    video_placeholder,
                    1,
                )

                video_grid_thw_lst.append(video_outputs["video_grid_thw"])
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                pixel_values_videos_lst.append(video_outputs["pixel_values_videos"])
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            video_outputs = dict(
                pixel_values_videos=torch.cat(pixel_values_videos_lst),
                video_grid_thw=torch.cat(video_grid_thw_lst),
            )
        else:
            video_outputs = dict()

        processed_outputs = super()._call_hf_processor(
            prompt=prompt,
            mm_data=mm_data,
            mm_kwargs=mm_kwargs,
            tok_kwargs=tok_kwargs,
        )
        combined_outputs = dict(
            processed_outputs,
            **video_outputs,
        )
        return BatchFeature(combined_outputs)

    def _get_mm_fields_config(
        self,
        hf_inputs: BatchFeature,
        hf_processor_mm_kwargs: Mapping[str, object],
    ) -> Mapping[str, MultiModalFieldConfig]:
        image_grid_thw = hf_inputs.get("image_grid_thw", torch.empty((0, 3)))
        image_grid_sizes = image_grid_thw.prod(-1)

        video_grid_thw = hf_inputs.get("video_grid_thw", torch.empty((0, 3)))
        video_grid_sizes = video_grid_thw.prod(-1)

        return dict(
            pixel_values=MultiModalFieldConfig.flat_from_sizes(
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                "image", image_grid_sizes
            ),
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            image_embeds=MultiModalFieldConfig.flat_from_sizes(
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                "image", image_grid_sizes
            ),
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            image_grid_thw=MultiModalFieldConfig.batched("image"),
            pixel_values_videos=MultiModalFieldConfig.flat_from_sizes(
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                "video", video_grid_sizes
            ),
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            video_embeds=MultiModalFieldConfig.flat_from_sizes(
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                "video", video_grid_sizes
            ),
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            video_grid_thw=MultiModalFieldConfig.batched("video"),
        )

    def _get_prompt_updates(
        self,
        mm_items: MultiModalDataItems,
        hf_processor_mm_kwargs: Mapping[str, Any],
        out_mm_kwargs: MultiModalKwargsItems,
    ) -> Sequence[PromptUpdate]:
        hf_processor = self.info.get_hf_processor(**hf_processor_mm_kwargs)
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        image_processor = self.info.get_image_processor(**hf_processor_mm_kwargs)
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        tokenizer = self.info.get_tokenizer()
        hf_config = self.info.get_hf_config()

        video_token_id = hf_config.video_token_id
        vision_start_token_id = hf_config.vision_start_token_id
        vision_end_token_id = hf_config.vision_end_token_id

        merge_length = image_processor.merge_size**2

        def get_image_replacement_qwen3vl(item_idx: int):
            out_item = out_mm_kwargs["image"][item_idx]
            grid_thw = out_item["image_grid_thw"].data
            assert isinstance(grid_thw, torch.Tensor)

            num_tokens = int(grid_thw.prod()) // merge_length
            return [hf_processor.image_token_id] * num_tokens

        def get_video_replacement_qwen3vl(item_idx: int):
            out_item = out_mm_kwargs["video"][item_idx]
            grid_thw = out_item["video_grid_thw"].data
            assert isinstance(grid_thw, torch.Tensor)

            video, metadata = mm_items["video"][item_idx]
            do_sample_frames = hf_processor_mm_kwargs.get("do_sample_frames")
            sampled_fps = hf_processor_mm_kwargs.get("fps")
            if is_list_of(sampled_fps, float):
                sampled_fps = sampled_fps[item_idx]
            timestamps = self.info._get_video_second_idx(
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                metadata, out_item, do_sample_frames, sampled_fps
            )
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            assert len(timestamps) == grid_thw[0], (
                f"The timestamps length({len(timestamps)}) should be equal "
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                f"video length ({grid_thw[0]})."
            )
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            frames_idx_token = [
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                tokenizer.encode(f"<{curr_time:.1f} seconds>", add_special_tokens=False)
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                for curr_time in timestamps
            ]
            num_tokens_per_frame = int(grid_thw[1:].prod()) // merge_length
            placeholder = []
            for frame_idx in frames_idx_token:
                placeholder.extend(frame_idx)
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                placeholder.extend(
                    [vision_start_token_id]
                    + [video_token_id] * num_tokens_per_frame
                    + [vision_end_token_id]
                )
            return PromptUpdateDetails.select_token_id(placeholder, video_token_id)
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        return [
            PromptReplacement(
                modality="image",
                target=hf_processor.image_token,
                replacement=get_image_replacement_qwen3vl,
            ),
            # NOTE: We match string on purpose since searching sequence of
            # token ids takes more time.
            PromptReplacement(
                modality="video",
                target="<|vision_start|><|video_pad|><|vision_end|>",
                replacement=get_video_replacement_qwen3vl,
            ),
        ]


@support_torch_compile(
    dynamic_arg_dims={
        "input_ids": 0,
        # positions is of shape (3, seq_len) if mrope is enabled for qwen2-vl,
        # otherwise (seq_len, ).
        "positions": -1,
        "intermediate_tensors": 0,
        "inputs_embeds": 0,
        # the same shape as input_embeds
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        "deepstack_input_embeds": 0,
    }
)
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class Qwen3LLMModel(Qwen3Model):
    def __init__(self, *, vllm_config: VllmConfig, prefix: str = ""):
        super().__init__(vllm_config=vllm_config, prefix=prefix)
        if not get_pp_group().is_first_rank:
            assert self.start_layer >= len(
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                vllm_config.model_config.hf_config.vision_config.deepstack_visual_indexes
            ), (
                "start_layer should be greater than or equal to "
                "len(deepstack_visual_indexes)"
            )
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    def forward(
        self,
        input_ids: torch.Tensor,
        positions: torch.Tensor,
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        intermediate_tensors: IntermediateTensors | None = None,
        inputs_embeds: torch.Tensor | None = None,
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        # args for deepstack
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        deepstack_input_embeds: IntermediateTensors | None = None,
    ) -> torch.Tensor | IntermediateTensors:
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        if get_pp_group().is_first_rank:
            if inputs_embeds is not None:
                hidden_states = inputs_embeds
            else:
                hidden_states = self.get_input_embeddings(input_ids)
            residual = None
        else:
            assert intermediate_tensors is not None
            hidden_states = intermediate_tensors["hidden_states"]
            residual = intermediate_tensors["residual"]
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        for layer_idx, layer in islice(
            enumerate(self.layers), self.start_layer, self.end_layer
1111
        ):
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            hidden_states, residual = layer(
                positions,
                hidden_states,
                residual,
            )

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            if deepstack_input_embeds is not None and layer_idx in range(
                0, len(deepstack_input_embeds)
            ):
                hidden_states = (
                    hidden_states
                    + deepstack_input_embeds[f"deepstack_input_embeds_{layer_idx}"]
                )
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        if not get_pp_group().is_last_rank:
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            return IntermediateTensors(
                {"hidden_states": hidden_states, "residual": residual}
            )
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        hidden_states, _ = self.norm(hidden_states, residual)
        return hidden_states


class Qwen3LLMForCausalLM(Qwen3ForCausalLM):
    def __init__(self, *, vllm_config: VllmConfig, prefix: str = ""):
        super(Qwen3ForCausalLM, self).__init__()
        config = vllm_config.model_config.hf_config.text_config
        quant_config = vllm_config.quant_config

        self.config = config

        self.quant_config = quant_config
        self.model = Qwen3LLMModel(vllm_config=vllm_config, prefix=prefix)

        if get_pp_group().is_last_rank:
            if config.tie_word_embeddings:
                self.lm_head = self.model.embed_tokens
            else:
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                self.lm_head = ParallelLMHead(
                    config.vocab_size,
                    config.hidden_size,
                    quant_config=quant_config,
                    prefix="lm_head",
                )
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        else:
            self.lm_head = PPMissingLayer()

        self.logits_processor = LogitsProcessor(config.vocab_size)

        self.make_empty_intermediate_tensors = (
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            self.model.make_empty_intermediate_tensors
        )
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@MULTIMODAL_REGISTRY.register_processor(
    Qwen3VLMultiModalProcessor,
    info=Qwen3VLProcessingInfo,
    dummy_inputs=Qwen3VLDummyInputsBuilder,
)
class Qwen3VLForConditionalGeneration(
1171
    nn.Module, SupportsMultiModal, SupportsLoRA, SupportsPP, SupportsMRoPE
1172
):
1173
    merge_by_field_config = True
1174
    multimodal_cpu_fields = {"image_grid_thw", "video_grid_thw"}
1175

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    packed_modules_mapping = {
        "qkv_proj": [
            "q_proj",
            "k_proj",
            "v_proj",
        ],
        "gate_up_proj": [
            "gate_proj",
            "up_proj",
        ],
    }
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    supports_encoder_tp_data = True

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    # To ensure correct weight loading and mapping.
    hf_to_vllm_mapper = WeightsMapper(
        orig_to_new_prefix={
            "model.visual.": "visual.",
            "lm_head.": "language_model.lm_head.",
            "model.language_model.": "language_model.model.",
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        }
    )
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    @classmethod
1200
    def get_placeholder_str(cls, modality: str, i: int) -> str | None:
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        if modality.startswith("image"):
            return "<|vision_start|><|image_pad|><|vision_end|>"
        if modality.startswith("video"):
            return "<|vision_start|><|video_pad|><|vision_end|>"

        raise ValueError("Only image or video modality is supported")

    def __init__(self, *, vllm_config: VllmConfig, prefix: str = "model"):
        super().__init__()
        config: Qwen3VLConfig = vllm_config.model_config.hf_config
        quant_config = vllm_config.quant_config
        multimodal_config = vllm_config.model_config.multimodal_config

        self.config = config
        self.multimodal_config = multimodal_config
1216
        self.use_data_parallel = multimodal_config.mm_encoder_tp_mode == "data"
1217
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        if not multimodal_config.get_limit_per_prompt(
            "image"
        ) and not multimodal_config.get_limit_per_prompt("video"):
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            self.visual = None
        else:
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            attn_backend_override = (
                multimodal_config.mm_encoder_attn_backend
                if multimodal_config is not None
                else None
            )
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            self.visual = Qwen3_VisionTransformer(
                config.vision_config,
                norm_eps=getattr(config, "rms_norm_eps", 1e-6),
                quant_config=quant_config,
                prefix=maybe_prefix(prefix, "visual"),
                use_data_parallel=self.use_data_parallel,
1233
                attn_backend_override=attn_backend_override,
1234
            )
1235

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        self.language_model = Qwen3LLMForCausalLM(
            vllm_config=vllm_config, prefix=maybe_prefix(prefix, "language_model")
        )
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        self.make_empty_intermediate_tensors = (
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            self.language_model.make_empty_intermediate_tensors
        )
1243

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        self.use_deepstack = hasattr(config.vision_config, "deepstack_visual_indexes")
        self.deepstack_num_level = (
            len(config.vision_config.deepstack_visual_indexes)
            if self.use_deepstack
            else 0
        )
1250
        # register buffer for deepstack
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        if self.use_deepstack and self.visual is not None:
            self.deepstack_input_embeds = [
                torch.zeros(
                    vllm_config.scheduler_config.max_num_batched_tokens,
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                    config.text_config.hidden_size,
                )
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                for _ in range(self.deepstack_num_level)
            ]
        else:
            self.deepstack_input_embeds = None
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        self.visual_dim = config.vision_config.out_hidden_size
        self.multiscale_dim = self.visual_dim * self.deepstack_num_level
1263

1264
    def _get_deepstack_input_embeds(self, num_tokens: int) -> IntermediateTensors:
1265
        # get deepstack_input_embeds from buffer, and clear the buffer
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        return IntermediateTensors(
            {
                f"deepstack_input_embeds_{idx}": self.deepstack_input_embeds[idx][
                    :num_tokens
                ]
                for idx in range(self.deepstack_num_level)
            }
        )

    def _set_deepstack_input_embeds(self, deepstack_input_embeds: torch.Tensor) -> None:
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        # set deepstack_input_embeds to buffer
        num_tokens = deepstack_input_embeds.size(1)
        if num_tokens > self.deepstack_input_embeds[0].size(0):
            self.deepstack_input_embeds = [
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                torch.zeros(
                    num_tokens,
                    self.config.text_config.hidden_size,
                    device=self.deepstack_input_embeds[0].device,
                    dtype=self.deepstack_input_embeds[0].dtype,
                )
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                for _ in range(self.deepstack_num_level)
            ]
        for idx in range(self.deepstack_num_level):
            self.deepstack_input_embeds[idx][:num_tokens].copy_(
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                deepstack_input_embeds[idx]
            )
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    def _clear_deepstack_input_embeds(self, num_tokens: int) -> None:
        # clear deepstack_input_embeds in buffer
        if num_tokens > 0:
            for idx in range(self.deepstack_num_level):
                self.deepstack_input_embeds[idx][:num_tokens].zero_()

    def _parse_and_validate_image_input(
1300
        self, **kwargs: object
1301
    ) -> Qwen2_5_VLImageInputs | None:
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        pixel_values = kwargs.pop("pixel_values", None)
        image_embeds = kwargs.pop("image_embeds", None)
        image_grid_thw = kwargs.pop("image_grid_thw", None)

        if pixel_values is None and image_embeds is None:
            return None

        if pixel_values is not None:
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            return Qwen2_5_VLImagePixelInputs(
                type="pixel_values",
                pixel_values=pixel_values,
                image_grid_thw=image_grid_thw,
            )
1315
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        if image_embeds is not None:
            return Qwen2_5_VLImageEmbeddingInputs(
                type="image_embeds",
                image_embeds=image_embeds,
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                image_grid_thw=image_grid_thw,
            )
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    def _parse_and_validate_video_input(
1324
        self, **kwargs: object
1325
    ) -> Qwen2_5_VLVideoInputs | None:
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        pixel_values_videos = kwargs.pop("pixel_values_videos", None)
        video_embeds = kwargs.pop("video_embeds", None)
        video_grid_thw = kwargs.pop("video_grid_thw", None)
        second_per_grid_ts = kwargs.pop("second_per_grid_ts", None)

        if pixel_values_videos is None and video_embeds is None:
            return None

        if pixel_values_videos is not None:
            return Qwen2_5_VLVideoPixelInputs(
                type="pixel_values_videos",
                pixel_values_videos=pixel_values_videos,
                video_grid_thw=video_grid_thw,
                second_per_grid_ts=second_per_grid_ts,
            )

        if video_embeds is not None:
            return Qwen2_5_VLVideoEmbeddingInputs(
                type="video_embeds",
                video_embeds=video_embeds,
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                video_grid_thw=video_grid_thw,
            )
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    def _process_image_input(
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        self, image_input: Qwen2_5_VLImageInputs
    ) -> tuple[torch.Tensor, ...]:
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        grid_thw = image_input["image_grid_thw"]
        assert grid_thw.ndim == 2

        if image_input["type"] == "image_embeds":
            image_embeds = image_input["image_embeds"].type(self.visual.dtype)
        else:
            pixel_values = image_input["pixel_values"].type(self.visual.dtype)
1359
            if self.use_data_parallel:
1360
                return run_dp_sharded_mrope_vision_model(
1361
                    self.visual, pixel_values, grid_thw.tolist(), rope_type="rope_3d"
1362
                )
1363
            else:
1364
                image_embeds = self.visual(pixel_values, grid_thw=grid_thw)
1365
1366
1367

        # Split concatenated embeddings for each image item.
        merge_size = self.visual.spatial_merge_size
1368
        sizes = (grid_thw.prod(-1) // merge_size // merge_size).tolist()
1369
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1371
        return image_embeds.split(sizes)

    def _process_video_input(
1372
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        self, video_input: Qwen2_5_VLVideoInputs
    ) -> tuple[torch.Tensor, ...]:
1374
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        grid_thw = video_input["video_grid_thw"]
        assert grid_thw.ndim == 2

        if video_input["type"] == "video_embeds":
            video_embeds = video_input["video_embeds"].type(self.visual.dtype)
        else:
            pixel_values_videos = video_input["pixel_values_videos"].type(
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                self.visual.dtype
            )
1383
            if self.use_data_parallel:
1384
                grid_thw_list = grid_thw.tolist()
1385
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1387
                return run_dp_sharded_mrope_vision_model(
                    self.visual, pixel_values_videos, grid_thw_list, rope_type="rope_3d"
                )
1388
            else:
1389
                video_embeds = self.visual(pixel_values_videos, grid_thw=grid_thw)
1390
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1392

        # Split concatenated embeddings for each video item.
        merge_size = self.visual.spatial_merge_size
1393
        sizes = (grid_thw.prod(-1) // merge_size // merge_size).tolist()
1394
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1398
        return video_embeds.split(sizes)

    def _parse_and_validate_multimodal_inputs(self, **kwargs: object) -> dict:
        mm_input_by_modality = {}
        for input_key in kwargs:
1399
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1405
1406
1407
1408
1409
1410
1411
1412
            if (
                input_key in ("pixel_values", "image_embeds")
                and "image" not in mm_input_by_modality
            ):
                mm_input_by_modality["image"] = self._parse_and_validate_image_input(
                    **kwargs
                )
            if (
                input_key in ("pixel_values_videos", "video_embeds")
                and "video" not in mm_input_by_modality
            ):
                mm_input_by_modality["video"] = self._parse_and_validate_video_input(
                    **kwargs
                )
1413
1414
        return mm_input_by_modality

1415
    def get_mrope_input_positions(
1416
        self,
1417
        input_tokens: list[int],
1418
        mm_features: list[MultiModalFeatureSpec],
1419
    ) -> tuple[torch.Tensor, int]:
1420
1421
1422
1423
1424
1425
        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", [])]
1426
1427
1428

        video_grid_thw = [[1, h, w] for t, h, w in video_grid_thw for _ in range(t)]

1429
        hf_config = self.config
1430
1431
1432
1433
1434
        image_token_id = hf_config.image_token_id
        video_token_id = hf_config.video_token_id
        vision_start_token_id = hf_config.vision_start_token_id
        spatial_merge_size = hf_config.vision_config.spatial_merge_size

1435
1436
1437
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1439
        input_tokens_array = np.array(input_tokens)
        vision_start_mask = input_tokens_array == vision_start_token_id
        vision_tokens = input_tokens_array[vision_start_mask.nonzero()[0] + 1]
        image_nums = np.count_nonzero(vision_tokens == image_token_id)
        video_nums = np.count_nonzero(vision_tokens == video_token_id)
1440
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1445
1446
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1450
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1453
1454
1455
        llm_pos_ids_list: list = []

        st = 0
        remain_images, remain_videos = image_nums, video_nums

        image_index, video_index = 0, 0
        for _ in range(image_nums + video_nums):
            if image_token_id in input_tokens and remain_images > 0:
                ed_image = input_tokens.index(image_token_id, st)
            else:
                ed_image = len(input_tokens) + 1
            if video_token_id in input_tokens and remain_videos > 0:
                ed_video = input_tokens.index(video_token_id, st)
            else:
                ed_video = len(input_tokens) + 1
            if ed_image < ed_video:
1456
                t, h, w = image_grid_thw[image_index]
1457
1458
1459
1460
                image_index += 1
                remain_images -= 1
                ed = ed_image
            else:
1461
                t, h, w = video_grid_thw[video_index]
1462
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1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
                video_index += 1
                remain_videos -= 1
                ed = ed_video

            llm_grid_t, llm_grid_h, llm_grid_w = (
                t,
                h // spatial_merge_size,
                w // spatial_merge_size,
            )
            text_len = ed - st

            st_idx = llm_pos_ids_list[-1].max() + 1 if len(llm_pos_ids_list) > 0 else 0
            llm_pos_ids_list.append(
1475
                np.broadcast_to(np.arange(text_len), (3, text_len)) + st_idx
1476
1477
            )

1478
1479
            grid_indices = np.indices((llm_grid_t, llm_grid_h, llm_grid_w))
            llm_pos_ids_list.append(grid_indices.reshape(3, -1) + text_len + st_idx)
1480
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1482
1483
1484
1485
            st = ed + llm_grid_t * llm_grid_h * llm_grid_w

        if st < len(input_tokens):
            st_idx = llm_pos_ids_list[-1].max() + 1 if len(llm_pos_ids_list) > 0 else 0
            text_len = len(input_tokens) - st
            llm_pos_ids_list.append(
1486
                np.broadcast_to(np.arange(text_len), (3, text_len)) + st_idx
1487
1488
            )

1489
        llm_positions = np.concatenate(llm_pos_ids_list, axis=1).reshape(3, -1)
1490
        mrope_position_delta = (llm_positions.max() + 1 - len(input_tokens)).item()
1491
        return torch.from_numpy(llm_positions), mrope_position_delta
1492

1493
1494
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1496
    def get_language_model(self) -> torch.nn.Module:
        return self.language_model

    def get_multimodal_embeddings(
1497
        self, **kwargs: object
1498
    ) -> MultiModalEmbeddings | None:
1499
        mm_input_by_modality = self._parse_and_validate_multimodal_inputs(**kwargs)
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
        if not mm_input_by_modality:
            return None

        # The result multimodal_embeddings is tuple of tensors, with each
        # tensor correspoending to a multimodal data item (image or video).
        multimodal_embeddings: tuple[torch.Tensor, ...] = ()

        # NOTE: It is important to iterate over the keys in this dictionary
        # to preserve the order of the modalities.
        for modality in mm_input_by_modality:
            multimodal_input = mm_input_by_modality[modality]
            if modality == "image":
1512
1513
                image_embeddings = self._process_image_input(multimodal_input)
                multimodal_embeddings += tuple(image_embeddings)
1514
1515
            if modality == "video":
                video_embeddings = self._process_video_input(multimodal_input)
1516
                multimodal_embeddings += tuple(video_embeddings)
1517
1518
1519
        return multimodal_embeddings

    def _compute_deepstack_embeds(
1520
1521
1522
1523
1524
1525
        self,
        inputs_embeds: torch.Tensor,
        multimodal_embeddings: MultiModalEmbeddings,
        is_multimodal: torch.Tensor,
    ) -> tuple[torch.Tensor, MultiModalEmbeddings]:
        visual_lens = [len(x) for x in multimodal_embeddings]
1526
1527
        multimodal_embeddings_cat = torch.cat(multimodal_embeddings, dim=0)

1528
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1534
1535
        (
            multimodal_embeddings_main,
            multimodal_embeddings_multiscale,
        ) = torch.split(
            multimodal_embeddings_cat,
            [self.visual_dim, self.multiscale_dim],
            dim=-1,
        )
1536

1537
1538
1539
        multimodal_embeddings = torch.split(
            multimodal_embeddings_main, visual_lens, dim=0
        )
1540
        multimodal_embeddings_multiscale = torch.split(
1541
1542
            multimodal_embeddings_multiscale, visual_lens, dim=0
        )
1543
1544

        deepstack_input_embeds = inputs_embeds.new_zeros(
1545
1546
            inputs_embeds.size(0), self.deepstack_num_level * inputs_embeds.size(1)
        )
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        deepstack_input_embeds = _merge_multimodal_embeddings(
            inputs_embeds=deepstack_input_embeds,
            multimodal_embeddings=multimodal_embeddings_multiscale,
            is_multimodal=is_multimodal,
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        )
        deepstack_input_embeds = deepstack_input_embeds.view(
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            inputs_embeds.shape[0], self.deepstack_num_level, self.visual_dim
        )
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        deepstack_input_embeds = deepstack_input_embeds.permute(1, 0, 2)
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        return deepstack_input_embeds, multimodal_embeddings

    def get_input_embeddings(
        self,
        input_ids: torch.Tensor,
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        multimodal_embeddings: MultiModalEmbeddings | None = None,
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        *,
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        is_multimodal: torch.Tensor | None = None,
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        handle_oov_mm_token: bool = False,
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    ) -> torch.Tensor:
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        inputs_embeds = self._get_text_embeddings(
            input_ids,
            self.language_model.get_input_embeddings,
            is_multimodal=is_multimodal,
            handle_oov_mm_token=handle_oov_mm_token,
        )

        if multimodal_embeddings is None or len(multimodal_embeddings) == 0:
            return inputs_embeds

        if is_multimodal is None:
            raise ValueError(
                "`get_input_embeddings` now requires `is_multimodal` arg, "
                "please update your model runner according to "
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                "https://github.com/vllm-project/vllm/pull/16229."
            )
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        if self.use_deepstack:
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            (
                deepstack_input_embeds,
                multimodal_embeddings,
            ) = self._compute_deepstack_embeds(
                inputs_embeds=inputs_embeds,
                multimodal_embeddings=multimodal_embeddings,
                is_multimodal=is_multimodal,
            )
        else:
            deepstack_input_embeds = None

        inputs_embeds = _merge_multimodal_embeddings(
            inputs_embeds=inputs_embeds,
            multimodal_embeddings=multimodal_embeddings,
            is_multimodal=is_multimodal,
        )

        if deepstack_input_embeds is not None:
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            self._set_deepstack_input_embeds(deepstack_input_embeds)

        return inputs_embeds

    def forward(
        self,
        input_ids: torch.Tensor,
        positions: torch.Tensor,
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        intermediate_tensors: IntermediateTensors | None = None,
        inputs_embeds: torch.Tensor | None = None,
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        **kwargs: object,
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    ) -> torch.Tensor | IntermediateTensors:
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        """Run forward pass for Qwen3VL.

        Args:
            input_ids: Flattened (concatenated) input_ids corresponding to a
                batch.
            positions: Flattened (concatenated) position ids corresponding to a
                batch.
                **NOTE**: If mrope is enabled (default setting for Qwen3VL
                opensource models), the shape will be `(3, seq_len)`,
                otherwise it will be `(seq_len,).
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            intermediate_tensors: Intermediate tensors from previous pipeline
                stages.
            inputs_embeds: Pre-computed input embeddings.
            **kwargs: Additional keyword arguments including:
                - pixel_values: Pixel values to be fed to a model.
                    `None` if no images are passed.
                - image_grid_thw: Tensor `(n_images, 3)` of image 3D grid in
                    LLM. `None` if no images are passed.
                - pixel_values_videos: Pixel values of videos to be fed to a
                    model. `None` if no videos are passed.
                - video_grid_thw: Tensor `(n_videos, 3)` of video 3D grid in
                    LLM. `None` if no videos are passed.
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        """

        if intermediate_tensors is not None:
            inputs_embeds = None

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        if (
            self.use_deepstack
            and inputs_embeds is not None
            and get_pp_group().is_first_rank
        ):
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            deepstack_input_embeds = self._get_deepstack_input_embeds(
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                inputs_embeds.size(0)
            )
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        else:
            deepstack_input_embeds = None

        hidden_states = self.language_model.model(
            input_ids=input_ids,
            positions=positions,
            intermediate_tensors=intermediate_tensors,
            inputs_embeds=inputs_embeds,
            # args for deepstack
            deepstack_input_embeds=deepstack_input_embeds,
        )

        if inputs_embeds is not None and get_pp_group().is_first_rank:
            self._clear_deepstack_input_embeds(inputs_embeds.size(0))

        return hidden_states

    def compute_logits(
        self,
        hidden_states: torch.Tensor,
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    ) -> torch.Tensor | None:
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        return self.language_model.compute_logits(hidden_states)
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    def load_weights(self, weights: Iterable[tuple[str, torch.Tensor]]) -> set[str]:
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        skip_prefixes = []
        if self.visual is None:
            skip_prefixes.extend(["visual."])
        loader = AutoWeightsLoader(self, skip_prefixes=skip_prefixes)
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        return loader.load_weights(weights, mapper=self.hf_to_vllm_mapper)

    def get_mm_mapping(self) -> MultiModelKeys:
        """
        Get the module prefix in multimodal models
        """
        return MultiModelKeys.from_string_field(
            language_model="language_model",
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            connector="visual.merger",
            tower_model="visual.",
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        )