refactor(engine): 重构字幕引擎

- 更新 GummyTranslator 类，优化字幕生成逻辑
- 移除 audioprcs 模块，音频处理功能转移到 utils 模块
- 重构 sysaudio 模块，提高音频流管理的灵活性和稳定性
- 修改 TODO.md，完成按时间降序排列字幕记录的功能
- 更新文档，说明因资源限制将不再维护英文和日文文档

engine/audio2text/gummy.py

@@ -6,8 +6,8 @@ from dashscope.audio.asr import (
 )
 import dashscope
 from datetime import datetime
-import json
-import sys
+from utils import stdout_cmd, stdout_obj
+
 
 class Callback(TranslationRecognizerCallback):
     """
@@ -17,15 +17,16 @@ class Callback(TranslationRecognizerCallback):
         super().__init__()
         self.usage = 0
         self.cur_id = -1
+        self.index = 0
         self.time_str = ''
 
     def on_open(self) -> None:
-        # print("on_open")
-        pass
+        self.cur_id = -1
+        self.time_str = ''
+        stdout_cmd('info', 'Gummy translator started.')
 
     def on_close(self) -> None:
-        # print("on_close")
-        pass
+        stdout_cmd('info', 'Gummy translator closed.')
 
     def on_event(
         self,
@@ -35,17 +36,18 @@ class Callback(TranslationRecognizerCallback):
         usage
     ) -> None:
         caption = {}
+
         if transcription_result is not None:
-            caption['index'] = transcription_result.sentence_id
-            caption['text'] = transcription_result.text
-            if caption['index'] != self.cur_id:
-                self.cur_id = caption['index']
-                cur_time = datetime.now().strftime('%H:%M:%S.%f')[:-3]
-                caption['time_s'] = cur_time
-                self.time_str = cur_time
-            else:
-                caption['time_s'] = self.time_str
+            if self.cur_id != transcription_result.sentence_id:
+                self.time_str = datetime.now().strftime('%H:%M:%S.%f')[:-3]
+                self.cur_id = transcription_result.sentence_id
+                self.index += 1  
+            caption['command'] = 'caption'
+            caption['index'] = self.index
+            caption['time_s'] = self.time_str
             caption['time_t'] = datetime.now().strftime('%H:%M:%S.%f')[:-3]
+            caption['end'] = transcription_result.is_sentence_end
+            caption['text'] = transcription_result.text
             caption['translation'] = ""
 
         if translation_result is not None:
@@ -55,19 +57,8 @@ class Callback(TranslationRecognizerCallback):
         if usage:
             self.usage += usage['duration']
 
-        # print(caption)
-        self.send_to_node(caption)
+        stdout_obj(caption)
 
-    def send_to_node(self, data):
-        """
-        将数据发送到 Node.js 进程
-        """
-        try:
-            json_data = json.dumps(data) + '\n'
-            sys.stdout.write(json_data)
-            sys.stdout.flush()
-        except Exception as e:
-            print(f"Error sending data to Node.js: {e}", file=sys.stderr)
 
 class GummyTranslator:
     """
@@ -78,7 +69,7 @@ class GummyTranslator:
         source: 源语言代码字符串（zh, en, ja 等）
         target: 目标语言代码字符串（zh, en, ja 等）
     """
-    def __init__(self, rate, source, target, api_key):
+    def __init__(self, rate: int, source: str, target: str | None, api_key: str | None):
         if api_key:
             dashscope.api_key = api_key
         self.translator = TranslationRecognizerRealtime(