Add ParsertType Audio (#1637)

### What problem does this PR solve?

#1514 

### Type of change

- [x] New Feature (non-breaking change which adds functionality)

rag/app/audio.py

@@ -0,0 +1,42 @@
+#  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.
+#
+import io
+import re
+import numpy as np
+
+from api.db import LLMType
+from rag.nlp import rag_tokenizer
+from api.db.services.llm_service import LLMBundle
+from rag.nlp import tokenize
+
+
+def chunk(filename, binary, tenant_id, lang, callback=None, **kwargs):
+    doc = {
+        "docnm_kwd": filename,
+        "title_tks": rag_tokenizer.tokenize(re.sub(r"\.[a-zA-Z]+$", "", filename))
+    }
+    doc["title_sm_tks"] = rag_tokenizer.fine_grained_tokenize(doc["title_tks"])
+
+    # is it English
+    eng = lang.lower() == "english"  # is_english(sections)
+    try:
+        callback(0.1, "USE Sequence2Txt LLM to transcription the audio")
+        seq2txt_mdl = LLMBundle(tenant_id, LLMType.SPEECH2TEXT, lang=lang)
+        ans = seq2txt_mdl.transcription(binary)
+        callback(0.8, "Sequence2Txt LLM respond: %s ..." % ans[:32])
+        tokenize(doc, ans, eng)
+        return [doc]
+    except Exception as e:
+        callback(prog=-1, msg=str(e))
+
+    return []