分析了DEMO中的核心函数的代码，并添加了注释。详情如下：

 

  1. void TrunkWork(int trunkID) 
  2. { 
  3.     int VoiceID; 
  4.     int result; 
  5.     char FileName[200]; 
  6.  
  7.     result = DJNo7_GetChnState( trunkID/30,trunkID%30);     //检查中继通道状态 
  8.     if( result == CH_WAIT_RELEASE )     // 
  9.     {  
  10.         ResetTrunk(trunkID);    //复位中继通道 
  11.         DJNo7_SetChnState(trunkID/30,trunkID%30, CH_SET_FREE ); //wait app release resource  
  12.         return ; //process the next channel 
  13.     } 
  14.     switch(Trunk[trunkID].State) 
  15.     { 
  16.     case TRK_FREE: 
  17.         if(result==CALLEE_RECV_IAM) //呼叫到达 接收全地址 
  18.         { 
  19.             DJNo7_GetCalleeNum( trunkID/30,trunkID%30, Trunk[trunkID].CalleeCode);  //获取被叫 
  20.             DJNo7_GetCallerNum( trunkID/30,trunkID%30, Trunk[trunkID].CallerCode);  //获取主叫 
  21.             DJNo7_SetChnStateA( trunkID/30,trunkID%30, CALLEE_SET_ACM, ACM_ADDR_CHARGE | ACM_CALLEE_IDLE | ACM_ALL_NO7_PATH );//send ack signal 
  22.             DJNo7_SetChnStateA( trunkID/30,trunkID%30, CALLEE_SET_ANC, CSM_CHARGE );//send offhook signal 
  23.  
  24.             DJTrk_InitDtmfBuf(trunkID); // new add by HJN 
  25.              
  26.             strcpy ( FileName, DJSys_GetInstallDir () ); 
  27.             strcat ( FileName, "voc\\bank.001"); 
  28.             DJVoc_PlayFile(trunkID,FileName);   //开始播放欢迎语音 
  29.             Trunk[trunkID].State = TRK_WELCOME; 
  30.         } 
  31.         break; 
  32.          
  33.     case TRK_WELCOME: 
  34.         VoiceID = DJTrk_GetTrunkPlayID(trunkID);    //取得给本通道放音的语音通道号 
  35.         if(VoiceID<0)  
  36.         { 
  37.             MessageBox(NULL,"Get Voice ID Error!","Error",MB_OK); 
  38.             ResetTrunk(trunkID); 
  39.         } 
  40.         else 
  41.         { 
  42.             //DJVoc_CheckVoiceEnd--检查该语音通道的语音操作是否结束，即录放音是否到达指定的大小 
  43.             //DJTrk_GetReciveDtmfNum--读取DTMF拨号的位数，用户按一次键该数将递增，如果在系统DTMF缓冲区中没有收到DTMF，本函数返回0 
  44.             if(DJVoc_CheckVoiceEnd(VoiceID)||(DJTrk_GetReciveDtmfNum(trunkID)>0)) 
  45.             { 
  46.                 DJVoc_StopPlayFile(trunkID);    //停止放音 
  47.                 strcpy(FileName,DJSys_GetInstallDir()); 
  48.                 strcat(FileName,"voc\\bank.002"); 
  49.                 DJVoc_PlayFile(trunkID,FileName); 
  50.                 Trunk[trunkID].State=TRK_ACCOUNT; 
  51.             } 
  52.         } 
  53.         break; 
  54.     case TRK_ACCOUNT: 
  55.  
  56.         VoiceID=DJTrk_GetTrunkPlayID(trunkID); 
  57.         if(VoiceID>=0) 
  58.         { 
  59.             if(DJVoc_CheckVoiceEnd(VoiceID)) 
  60.             { 
  61.                 DJVoc_StopPlayFile(trunkID); 
  62.                 Trunk[trunkID].State = TRK_GETACCOUNT; 
  63.             } 
  64.         } 
  65.         if(DJTrk_GetReciveDtmfNum(trunkID)>=1) 
  66.         { 
  67.             if(VoiceID>0) DJVoc_StopPlayFile(trunkID); 
  68.             Trunk[trunkID].State = TRK_GETACCOUNT; 
  69.         } 
  70.         break; 
  71.     case TRK_GETACCOUNT: 
  72.         if(DJTrk_GetReciveDtmfNum(trunkID)>=8) 
  73.         { 
  74.             DJTrk_InitDtmfBuf(trunkID); 
  75.             strcpy ( FileName, DJSys_GetInstallDir () ); 
  76.             strcat ( FileName, "voc\\bank.003"); 
  77.             DJVoc_PlayFile(trunkID,FileName); 
  78.             Trunk[trunkID].State = TRK_PASSWORD; 
  79.         } 
  80.         break; 
  81.     case TRK_PASSWORD: 
  82.         VoiceID=DJTrk_GetTrunkPlayID(trunkID); 
  83.         if(VoiceID>=0) 
  84.         { 
  85.             if(DJVoc_CheckVoiceEnd(VoiceID)) 
  86.             { 
  87.                 DJVoc_StopPlayFile(trunkID); 
  88.                 Trunk[trunkID].State=TRK_GETPASSWORD; 
  89.             } 
  90.         } 
  91.         if(DJTrk_GetReciveDtmfNum(trunkID)>=1) 
  92.         { 
  93.             if(VoiceID>0) DJVoc_StopPlayFile(trunkID); 
  94.             Trunk[trunkID].State=TRK_GETPASSWORD; 
  95.         } 
  96.         break; 
  97.     case TRK_GETPASSWORD: 
  98.         if(DJTrk_GetReciveDtmfNum(trunkID)>=6) 
  99.         { 
  100.             DJTrk_InitDtmfBuf(trunkID); 
  101.             strcpy ( FileName, DJSys_GetInstallDir () ); 
  102.             strcat ( FileName, "voc\\bank.004"); 
  103.             DJVoc_PlayFile(trunkID,FileName); 
  104.             Trunk[trunkID].State = TRK_SELECT; 
  105.         } 
  106.         break; 
  107.     case TRK_SELECT: 
  108.         VoiceID=DJTrk_GetTrunkPlayID(trunkID); 
  109.         if(VoiceID>=0) 
  110.         { 
  111.             if(DJVoc_CheckVoiceEnd(VoiceID)) 
  112.             { 
  113.                 DJVoc_StopPlayFile(trunkID);                     
  114.             } 
  115.             VoiceID=-1; 
  116.         } 
  117.         if(DJTrk_GetReciveDtmfNum(trunkID)>0) 
  118.         { 
  119.             char Code = DJTrk_GetLastDtmfCode(trunkID); 
  120.             DJTrk_InitDtmfBuf(trunkID); 
  121.             switch(Code) 
  122.             { 
  123.             case '1': 
  124.                 if(VoiceID>0) DJVoc_StopPlayFile(trunkID); 
  125.                 DJVoc_InitIndexPlayFile(trunkID);   //对某一个中继通道初始化文件索引放音 
  126.                 strcpy ( FileName, DJSys_GetInstallDir () ); 
  127.                 strcat ( FileName, "voc\\bank.005"); 
  128.                 DJVoc_AddIndexPlayFile(trunkID,FileName);   //增加索引放音文件 
  129.                 strcpy ( FileName, DJSys_GetInstallDir () ); 
  130.                 strcat ( FileName, "voc\\d5"); 
  131.                 DJVoc_AddIndexPlayFile(trunkID,FileName); 
  132.  
  133.                 strcpy ( FileName, DJSys_GetInstallDir () ); 
  134.                 strcat ( FileName, "voc\\d8"); 
  135.                 DJVoc_AddIndexPlayFile(trunkID,FileName); 
  136.  
  137.                 strcpy ( FileName, DJSys_GetInstallDir () ); 
  138.                 strcat ( FileName, "voc\\d9"); 
  139.                 DJVoc_AddIndexPlayFile(trunkID,FileName); 
  140.  
  141.                 strcpy ( FileName, DJSys_GetInstallDir () ); 
  142.                 strcat ( FileName, "voc\\d6"); 
  143.                 DJVoc_AddIndexPlayFile(trunkID,FileName); 
  144.                 strcpy ( FileName, DJSys_GetInstallDir () ); 
  145.                 strcat ( FileName, "voc\\d15"); 
  146.                 DJVoc_AddIndexPlayFile(trunkID,FileName); 
  147.  
  148.                 strcpy ( FileName, DJSys_GetInstallDir () ); 
  149.                 strcat ( FileName, "voc\\d8"); 
  150.                 DJVoc_AddIndexPlayFile(trunkID,FileName); 
  151.  
  152.                 strcpy ( FileName, DJSys_GetInstallDir () ); 
  153.                 strcat ( FileName, "voc\\bank.008"); 
  154.                 DJVoc_AddIndexPlayFile(trunkID,FileName);    
  155.                 DJVoc_StartIndexPlayFile(trunkID);      //开始一次文件索引放音 
  156.                 Trunk[trunkID].State = TRK_PLAYRESULT; 
  157.                 break; 
  158.             case '2': 
  159.                 if(VoiceID>0) DJVoc_StopPlayFile(trunkID); 
  160.                 DJVoc_InitIndexPlayFile(trunkID); 
  161.                 strcpy(FileName,DJSys_GetInstallDir()); 
  162.                 strcat(FileName,"voc\\bank.006"); 
  163.                 DJVoc_AddIndexPlayFile(trunkID,FileName); 
  164.                 strcpy ( FileName, DJSys_GetInstallDir () ); 
  165.                 strcat ( FileName, "voc\\d0"); 
  166.                 DJVoc_AddIndexPlayFile(trunkID,FileName); 
  167.                 strcpy ( FileName, DJSys_GetInstallDir () ); 
  168.                 strcat ( FileName, "voc\\d15"); 
  169.                 DJVoc_AddIndexPlayFile(trunkID,FileName); 
  170.  
  171.                 strcpy ( FileName, DJSys_GetInstallDir () ); 
  172.                 strcat ( FileName, "voc\\d4"); 
  173.                 DJVoc_AddIndexPlayFile(trunkID,FileName); 
  174.                 strcpy ( FileName, DJSys_GetInstallDir () ); 
  175.                 strcat ( FileName, "voc\\d8"); 
  176.                 DJVoc_AddIndexPlayFile(trunkID,FileName); 
  177.  
  178.                 strcpy ( FileName, DJSys_GetInstallDir () ); 
  179.                 strcat ( FileName, "voc\\bank.008"); 
  180.                 DJVoc_AddIndexPlayFile(trunkID,FileName); 
  181.                 DJVoc_StartIndexPlayFile(trunkID); 
  182.                 Trunk[trunkID].State = TRK_PLAYRESULT; 
  183.                 break; 
  184.             case '3': 
  185.                 if(VoiceID>0) DJVoc_StopPlayFile(trunkID); 
  186.                 DJVoc_InitIndexPlayFile(trunkID); 
  187.                 strcpy(FileName,DJSys_GetInstallDir()); 
  188.                 strcat(FileName,"voc\\bank.007"); 
  189.                 DJVoc_AddIndexPlayFile(trunkID,FileName); 
  190.                 strcpy ( FileName, DJSys_GetInstallDir () ); 
  191.                 strcat ( FileName, "voc\\d3"); 
  192.                 DJVoc_AddIndexPlayFile(trunkID,FileName); 
  193.                 strcpy ( FileName, DJSys_GetInstallDir () ); 
  194.                 strcat ( FileName, "voc\\d7"); 
  195.                 DJVoc_AddIndexPlayFile(trunkID,FileName); 
  196.                 strcpy ( FileName, DJSys_GetInstallDir () ); 
  197.                 strcat ( FileName, "voc\\d0"); 
  198.                 DJVoc_AddIndexPlayFile(trunkID,FileName); 
  199.                 strcpy ( FileName, DJSys_GetInstallDir () ); 
  200.                 strcat ( FileName, "voc\\d0"); 
  201.                 DJVoc_AddIndexPlayFile(trunkID,FileName); 
  202.                 strcpy ( FileName, DJSys_GetInstallDir () ); 
  203.                 strcat ( FileName, "voc\\d0"); 
  204.                 DJVoc_AddIndexPlayFile(trunkID,FileName); 
  205.  
  206.                 strcpy ( FileName, DJSys_GetInstallDir () ); 
  207.                 strcat ( FileName, "voc\\bank.008"); 
  208.                 DJVoc_AddIndexPlayFile(trunkID,FileName); 
  209.                 DJVoc_StartIndexPlayFile(trunkID); 
  210.                 Trunk[trunkID].State = TRK_PLAYRESULT; 
  211.                 break; 
  212.         default: 
  213.                 break; 
  214.             } 
  215.         } 
  216.         break; 
  217.     case TRK_PLAYRESULT: 
  218.         if(DJVoc_CheckIndexPlayEnd(trunkID)) 
  219.         { 
  220.             DJVoc_StopIndexPlayFile(trunkID); 
  221.             Trunk[trunkID].State = TRK_HANGUP; 
  222.         } 
  223.         break; 
  224.     case TRK_RECORDFILE: 
  225.         VoiceID = DJTrk_GetTrunkPlayID(trunkID); 
  226.         if(DJVoc_CheckVoiceEnd(VoiceID)) 
  227.         { 
  228.             DJVoc_StopRecordFile(trunkID); 
  229.             Trunk[trunkID].State = TRK_HANGUP; 
  230.             break; 
  231.         } 
  232.         if(DJTrk_GetReciveDtmfNum(trunkID) >= 1) 
  233.         {    
  234.             if(DJTrk_GetLastDtmfCode(trunkID) == '5') 
  235.             { 
  236.                 DJVoc_StopRecordFile(trunkID); 
  237.                 Trunk[trunkID].State = TRK_HANGUP; 
  238.             } 
  239.         } 
  240.         break; 
  241.     case TRK_PLAYRECORD: 
  242.         VoiceID=DJTrk_GetTrunkPlayID(trunkID); 
  243.         if(VoiceID<0) 
  244.         { 
  245.             MessageBox(NULL,"Get Voice ID Error!","Error",MB_OK); 
  246.             Trunk[trunkID].State = TRK_HANGUP; 
  247.         } 
  248.         else 
  249.         { 
  250.             if(DJVoc_CheckVoiceEnd(VoiceID)) 
  251.             { 
  252.                 DJVoc_StopPlayFile(trunkID);                     
  253.                 Trunk[trunkID].State = TRK_HANGUP; 
  254.             } 
  255.         } 
  256.         break; 
  257.     case TRK_HANGUP: 
  258.         DJNo7_SetChnState(trunkID/30,trunkID%30, CALLEE_SET_CBK ); 
  259.         Trunk[trunkID].State = TRK_WAITFREE; 
  260.         break; 
  261.     case TRK_WAITFREE: 
  262.         break; 
  263.  
  264.     }//end switch 
  265. }