t38协议栈实现，完全代码

T38完整协议栈 int32 MT_T38_StartV21Modulation( x_MT_T38_ctx_t *px_T38id ) { int32 i_rc; x_MT_FR_MoDeMoInputStream x_InStrm; #if MT_T38_AUTOSTART_MOD px_T38id->ui_AutoStartTimeout = 0; #endif px_T38id->ui_TxChnFIFcount = 0; px_T38id->ui_CurrentModStd = MT_FR_STD_V21; px_T38id->ui_CurrentModT38Data = MT_T38_v21; px_T38id->ui_CurrentModIndicator = MT_T38_v21_preamble; /* set framing mode */ x_InStrm.e_framing_mode = MT_FR_FRAMING_HDLC; /* set frame exit */ x_InStrm.uxByteStream.pfnGetHdlcByte = MT_T38_GetOutHdlcByte; /* HDLC flags */ px_T38id->ui_FlagsFillsThreshold = sttblun_T38_SpoofingCount[MT_T38_v21]; #if MT_T38_UDP_BUILD px_T38id->ui_FlushFillsThr = MT_T38_UDP_PC_V21_FLAGS_FLUSH_THRESHOLD; #endif px_T38id->i_T38_Flags |= MT_T38_FL_MODULATING; px_T38id->i_T38_Flags1 &= ~MT_T38_FL1_MOD_V21_SENT; mtStr( MT_MTRID_T38, "T38:Start v21 mod" ) if( ( i_rc = MT_FR_MoDeMoStartModulation( &px_T38id->x_DownCtx, MT_FR_STD_V21, 0, &x_InStrm ) ) != 0 ) { mtStrNumD( MT_MTRID_T38 | MT_MTRID_ERR, "T38:Err StartModulation", i_rc ) } return i_rc; }