[Model] Support Qwen3-TTS model series (#895)

Signed-off-by: Gaohan123 <hgaoaf@connect.ust.hk>

tests/entrypoints/test_omni_input_preprocessor.py

@@ -0,0 +1,59 @@
+from vllm_omni.inputs.preprocess import OmniInputPreprocessor
+
+
+def _make_preprocessor(monkeypatch):
+    preprocessor = object.__new__(OmniInputPreprocessor)
+    monkeypatch.setattr(preprocessor, "_truncate_inputs", lambda tokens, tokenization_kwargs=None: tokens)
+    monkeypatch.setattr(
+        preprocessor,
+        "_process_multimodal",
+        lambda *args, **kwargs: {"prompt_token_ids": [1, 2, 3]},
+    )
+    monkeypatch.setattr(preprocessor, "_tokenize_prompt", lambda prompt_text, tokenization_kwargs=None: [9, 8, 7])
+    return preprocessor
+
+
+def test_process_tokens_keeps_additional_information(monkeypatch):
+    preprocessor = _make_preprocessor(monkeypatch)
+    parsed = {
+        "prompt_token_ids": [1, 2, 3],
+        "prompt_embeds": "embeds",
+        "additional_information": {"task": ["tts"], "lang": ["auto"]},
+    }
+
+    inputs = OmniInputPreprocessor._process_tokens(preprocessor, parsed)
+
+    assert inputs["prompt_token_ids"] == [1, 2, 3]
+    assert inputs["prompt_embeds"] == "embeds"
+    assert inputs["additional_information"] == {"task": ["tts"], "lang": ["auto"]}
+
+
+def test_process_text_keeps_additional_information(monkeypatch):
+    preprocessor = _make_preprocessor(monkeypatch)
+    parsed = {
+        "prompt": "hello",
+        "prompt_embeds": "embeds",
+        "additional_information": {"speaker": ["alice"]},
+    }
+
+    inputs = OmniInputPreprocessor._process_text(preprocessor, parsed)
+
+    assert inputs["prompt_token_ids"] == [9, 8, 7]
+    assert inputs["prompt_embeds"] == "embeds"
+    assert inputs["additional_information"] == {"speaker": ["alice"]}
+
+
+def test_process_text_multimodal_skips_empty_payloads(monkeypatch):
+    preprocessor = _make_preprocessor(monkeypatch)
+    parsed = {
+        "prompt": "hello",
+        "multi_modal_data": {"image": "fake"},
+        "prompt_embeds": None,
+        "additional_information": None,
+    }
+
+    inputs = OmniInputPreprocessor._process_text(preprocessor, parsed)
+
+    assert inputs["prompt_token_ids"] == [1, 2, 3]
+    assert "prompt_embeds" not in inputs
+    assert "additional_information" not in inputs