feat: 添加降噪处理

lib/talk/startChart/views/talkView/talk_view_logic.dart

@@ -570,8 +570,9 @@ class TalkViewLogic extends BaseGetXController {
   }
 
   Future<void> _onFrame(List<int> frame) async {
-    final list = listLinearToALaw(frame);
+    final List<int> processedFrame = preprocessAudio(frame);
-    final ms = DateTime.now().millisecondsSinceEpoch -
+    final List<int> list = listLinearToALaw(processedFrame);
+    final int ms = DateTime.now().millisecondsSinceEpoch -
         state.startRecordingAudioTime.value.millisecondsSinceEpoch;
     // 发送音频数据
     await StartChartManage().sendTalkDataMessage(
@@ -588,6 +589,19 @@ class TalkViewLogic extends BaseGetXController {
     AppLog.log(error.message!);
   }
 
+  List<int> preprocessAudio(List<int> pcmList) {
+    // 简单的降噪处理
+    final List<int> processedList = [];
+    for (int pcmVal in pcmList) {
+      // 简单的降噪示例：将小于阈值的信号置为0
+      if (pcmVal.abs() < 500) {
+        pcmVal = 0;
+      }
+      processedList.add(pcmVal);
+    }
+    return processedList;
+  }
+
   List<int> listLinearToALaw(List<int> pcmList) {
     final List<int> aLawList = [];
     for (int pcmVal in pcmList) {