[BugFix][Model] Fix Ernie4.5-VL hanging on long inputs (#24074)

Signed-off-by: wangyafeng <wangyafeng@baidu.com>

vllm/model_executor/models/ernie45_vl.py

@@ -66,8 +66,6 @@ from .vision import get_vit_attn_backend
 
 logger = init_logger(__name__)
 
-_MAX_FRAMES_PER_VIDEO = 16
-
 # === Vision Transformer === #
 
 
@@ -839,6 +837,15 @@ class Ernie4_5_VLProcessingInfo(BaseProcessingInfo):
     def get_supported_mm_limits(self) -> Mapping[str, Optional[int]]:
         return {"image": None, "video": None}
 
+    def get_mm_max_tokens_per_item(
+        self,
+        seq_len: int,
+        mm_counts: Mapping[str, int],
+    ) -> Mapping[str, int]:
+        max_image_tokens = self.get_max_image_tokens()
+        max_video_tokens = self.get_max_video_tokens(seq_len, mm_counts)
+        return {"image": max_image_tokens, "video": max_video_tokens}
+
     def _get_vision_info(
         self,
         *,
@@ -964,8 +971,7 @@ class Ernie4_5_VLProcessingInfo(BaseProcessingInfo):
         max_image_tokens = self.get_max_image_tokens() * max_images
         max_total_frames = self._get_max_video_frames(seq_len -
                                                       max_image_tokens)
-        max_frames_per_video = min(max_total_frames // max(max_videos, 1),
-                                   _MAX_FRAMES_PER_VIDEO)
+        max_frames_per_video = max_total_frames // max(max_videos, 1)
 
         return max(max_frames_per_video, 2)
 

vllm/model_executor/models/ernie45_vl_moe.py

@@ -287,8 +287,13 @@ class Ernie4_5_VLMoeMoE(nn.Module):
         if self.has_shared_experts:
             shared_output = self.shared_experts(hidden_states)
 
-        if visual_token_mask is not None and visual_token_mask.any():
-            # assert visual_token_mask.shape[0] != hidden_states.shape[0]
+        if visual_token_mask is not None and visual_token_mask.all():
+            # only vision modal input
+            router_logits, _ = self.vision_experts_gate(hidden_states)
+            final_hidden_states = self.vision_experts(
+                hidden_states=hidden_states, router_logits=router_logits)
+        elif visual_token_mask is not None and visual_token_mask.any():
+            # text and vision modals input
             visual_token_mask = visual_token_mask.repeat(
                 1, self.hidden_size).bool()
             text_token_mask = ~visual_token_mask
@@ -310,7 +315,7 @@ class Ernie4_5_VLMoeMoE(nn.Module):
                 hidden_states=vision_hidden_states,
                 router_logits=vision_router_logits).flatten()
         else:
-            # text modal input processing directly
+            # only text modal input
             text_router_logits, _ = self.text_experts_gate(hidden_states)
 
             final_hidden_states = self.text_experts(