fix:调整对讲时的音频问题

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

@@ -658,8 +658,22 @@ class TalkViewLogic extends BaseGetXController {
 
 // 音频帧处理
   Future<void> _onFrame(List<int> frame) async {
+    // 添加数据监控
+    int maxVal = 0;
+    int minVal = 0;
+    int sum = 0;
+    for (int val in frame) {
+      maxVal = max(maxVal, val);
+      minVal = min(minVal, val);
+      sum += val;
+    }
+    double average = sum / frame.length;
+    AppLog.log('音频数据特征 - 最大值: $maxVal, 最小值: $minVal, 平均值: $average');
+
     final List<int> processedFrame = preprocessAudio(frame);
-    final List<int> list = listLinearToALaw(processedFrame);
+    // 添加平滑处理
+    final List<int> smoothedFrame = smoothAudio(processedFrame);
+    final List<int> list = listLinearToALaw(smoothedFrame);
     _bufferedAudioFrames.addAll(list);
 
     final int ms = DateTime.now().millisecondsSinceEpoch -
@@ -671,6 +685,15 @@ class TalkViewLogic extends BaseGetXController {
     }
 
     if (_bufferedAudioFrames.length >= getFrameLength) {
+      // 添加数据监控
+      int maxVal = 0;
+      int minVal = 255;
+      for (int val in _bufferedAudioFrames) {
+        maxVal = max(maxVal, val);
+        minVal = min(minVal, val);
+      }
+      AppLog.log(
+          '发送音频数据 - G711编码后 - 最大值: $maxVal, 最小值: $minVal, 长度: ${_bufferedAudioFrames.length}');
       // 发送音频数据到UDP
       await StartChartManage()
           .sendTalkDataMessage(
@@ -691,19 +714,46 @@ class TalkViewLogic extends BaseGetXController {
     AppLog.log(error.message!);
   }
 
+  // 简化的音频预处理函数
   List<int> preprocessAudio(List<int> pcmList) {
-    // 简单的降噪处理
     final List<int> processedList = [];
+    final int noiseThreshold = 300; // 噪音阈值
+
     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() < 200) {
-        pcmVal = 0;
+      // 简单的噪音门控：小于阈值的信号会被减弱
+      if (pcmVal.abs() < noiseThreshold) {
+        pcmVal = (pcmVal * 0.3).round(); // 减弱噪音
       }
+
+      // 简单的压缩：防止大信号失真
+      if (pcmVal.abs() > 20000) {
+        double factor = 1.0 - ((pcmVal.abs() - 20000) / 12768) * 0.3;
+        pcmVal = (pcmVal * factor).round();
+      }
+
       processedList.add(pcmVal);
     }
+
     return processedList;
   }
 
+// 简单的平滑处理
+  List<int> smoothAudio(List<int> pcmList) {
+    final List<int> smoothedList = [];
+
+    for (int i = 0; i < pcmList.length; i++) {
+      if (i > 0 && i < pcmList.length - 1) {
+        // 简单的三点平均
+        int avg = (pcmList[i - 1] + pcmList[i] * 2 + pcmList[i + 1]) ~/ 4;
+        smoothedList.add(avg);
+      } else {
+        smoothedList.add(pcmList[i]);
+      }
+    }
+
+    return smoothedList;
+  }
+
   //test测试降噪算法
   // List<int> preprocessAudio(List<int> pcmList) {
   //   final List<int> processedList = [];
@@ -753,34 +803,31 @@ class TalkViewLogic extends BaseGetXController {
   //   return processedList;
   // }
 
+// 简化的音量调整
   List<int> adjustVolume(List<int> pcmList, double volume) {
     final List<int> adjustedPcmList = <int>[];
+
     for (final int pcmVal in pcmList) {
-      // 调整音量
       int adjustedPcmVal = (pcmVal * volume).round();
-
-      // 裁剪到 16-bit PCM 范围
-      if (adjustedPcmVal > 32767) {
-        adjustedPcmVal = 32767;
-      } else if (adjustedPcmVal < -32768) {
-        adjustedPcmVal = -32768;
-      }
-
+      adjustedPcmVal = adjustedPcmVal.clamp(-32768, 32767);
       adjustedPcmList.add(adjustedPcmVal);
     }
+
     return adjustedPcmList;
   }
 
+// 简化的A-law编码
   List<int> listLinearToALaw(List<int> pcmList) {
-    // 先调节音量
-    final List<int> adjustedPcmList = adjustVolume(pcmList, 5.0);
+    // 调整音量，使用适中的增益值
+    final List<int> adjustedPcmList = adjustVolume(pcmList, 2.2);
 
-    // 再进行 A-law 编码
+    // 执行A-law编码
     final List<int> aLawList = <int>[];
     for (final int pcmVal in adjustedPcmList) {
       final int aLawVal = linearToALaw(pcmVal);
       aLawList.add(aLawVal);
     }
+
     return aLawList;
   }