Migrate whisper inputs to TensorSchema (#23505)

Signed-off-by: Benji Beck <benjibeck@meta.com>

vllm/model_executor/models/whisper.py

@@ -4,7 +4,7 @@
 import math
 from collections.abc import Iterable, Mapping, Sequence
 from contextlib import nullcontext
-from typing import Literal, Optional, TypedDict, Union, cast
+from typing import Annotated, Literal, Optional, Union, cast
 
 import numpy as np
 import torch
@@ -40,6 +40,7 @@ from vllm.multimodal.processing import (BaseProcessingInfo,
                                         PromptReplacement, PromptUpdate)
 from vllm.multimodal.profiling import BaseDummyInputsBuilder
 from vllm.transformers_utils.processor import cached_get_processor
+from vllm.utils.tensor_schema import TensorSchema, TensorShape
 
 from .interfaces import (MultiModalEmbeddings, SupportsMultiModal,
                          SupportsTranscription, SupportsV0Only)
@@ -111,9 +112,16 @@ ISO639_1_SUPPORTED_LANGS = {
 }
 
 
-class WhisperAudioInputs(TypedDict):
+class WhisperAudioInputs(TensorSchema):
-    input_features: NestedTensors
+    """
-    """Shape: `(batch_size, 128, M)`"""
+    Dimensions:
+        - b: Batch size
+        - nmb: Number of mel bins
+        - t: Time frames (M)
+    """
+
+    input_features: Annotated[Optional[NestedTensors],
+                              TensorShape("b", "nmb", "t")]
 
 
 class WhisperPositionalEmbedding(nn.Embedding):