Dialogic IP Media Library API Programming Guide and Library ...

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About This Publication Toolkit Developers Independent Software Vendors (ISVs) Value Added Resellers (VARs) Original Equipment Manufacturers (OEMs) How to Use This Publication This publication assumes that you are familiar with the Linux or Windows ® operating system and the C programming language. The information in this guide is organized in two major parts: Programming Guide content, which describes the features of the Dialogic ® IP Media Library API and provides feature implementation guidelines. Library Reference content, which provides reference information about functions, data structures, events, and error codes. Related Information See the following for more information: For Dialogic ® product documentation, see http://www.dialogic.com/manuals For Dialogic technical support, see http://www.dialogic.com/support For Dialogic ® product information, see http://www.dialogic.com 20 Dialogic ® IP Media Library API Programming Guide and Library Reference Dialogic Corporation
1.Product Description This chapter provides an overview of the Dialogic ® IP Media Library API software. Topics include: 1.1 Features Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Architecture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Introduction to the Dialogic ® IP Media Library API . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Relationship with Dialogic ® Global Call API Library . . . . . . . . . . . . . . . . . . . . . . . . . 22 Dialogic ® Standard Runtime Library API Support. . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 Media Channel Device Naming. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 Features of the Dialogic ® IP Media Library API software include: media resource management, such as open, close, and configure tasks media resource operations, such as start, stop, and detect digits Quality of Service (QoS) threshold alarm configuration and status reporting support of Dialogic ® Standard Runtime Library API event management routines for error retrieval compatibility with Dialogic ® Global Call API library or another call control stack to provide IP call control functionality 1.2 Architecture Figure 1 shows the Dialogic ® IP Media Library API architecture when using a user-supplied call control stack. Dialogic ® IP Media Library API Programming Guide and Library Reference 21 Dialogic Corporation 1
Page 1 and 2: Dialogic ® IP Media Library API Pr
Page 3 and 4: Contents Revision History . . . . .
Page 5 and 6: Contents 16 Using the Selective Pac
Page 7 and 8: Contents CT_DEVINFO - channel/time
Page 9 and 10: Figures Contents 1 IP Media Archite
Page 11 and 12: Revision History This revision hist
Page 13 and 14: Document No. Publication Date Descr
Page 19: About This Publication The followin
Page 23 and 24: Refer to the following Global Call
Page 25 and 26: Table 1. High-Level Feature Support
Page 27 and 28: 4.State Models This chapter describ
Page 29 and 30: Event Handling ATDV_LASTERR( ) erro
Page 31 and 32: 7.Reserving Resources for Audio Cod
Page 33 and 34: 7.3 Reserve Resources for Inbound C
Page 35 and 36: Figure 5. Reserve Resources Implici
Page 37 and 38: Reserving Resources for Audio Coder
Page 39 and 40: 8.Using the AMR-NB Audio Coder This
Page 41 and 42: Using the AMR-NB Audio Coder Frame
Page 43 and 44: Using the AMR-NB Audio Coder 4. Sin
Page 45 and 46: Using the AMR-NB Audio Coder ipmMed
Page 47 and 48: NBUP_PROFILE_G711ALAW64K_20MS G.711
Page 49 and 50: Using AMR-NB and G.711 Audio Over N
Page 51 and 52: 10.3 Usage Guidelines H.263 Using R
Page 53 and 54: See RFC 3558 for details of these f
Page 55 and 56: 12.2 API Library Support Configurin
Page 57 and 58: Figure 9. Half- and Full-Duplex Med
Page 59 and 60: } Configuring for Half- or Full-Dup
Page 61 and 62: 13.2 Setting DTMF Parameters This s
Page 63 and 64: IPM_PARM_INFO parmInfo; unsigned lo
Page 65 and 66: 13.2.5 Setting Receive-only RFC 283
Page 67 and 68: 14.T.38 Fax Server 14 This chapter
Page 69 and 70: Figure 13. T.38 Fax Server Call Sce
Page 71 and 72:
} ipm_handle_disconnected = true; i
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} } if( sr_enbhdlr( ipm_handle, EV_
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15.2 Implementation Guidelines Impl
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#define NUMCHAN 2 class CHANNEL //
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Implementing Native T.38 Fax Hairpi
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Implementing Native T.38 Fax Hairpi
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Using the Selective Packet Filtrati
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17.2 QoS Alarm Types Quality of Ser
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17.4 QoS Event Types Quality of Ser
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Quality of Service (QoS) Alarms and
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Figure 15. QoS Scenario 2: True Ala
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Register event handler function wit
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} /* . . . . */ } Quality of Servic
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Quality of Service (QoS) Alarms and
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18.3 Implementing Volume Control Vo
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} } ipm_GetParm(nDeviceHandle, &par
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Using Echo Cancellation With echo c
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20.3 Example Code 1 for NAT Travers
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} } Using NAT Traversal in SIP Medi
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Using Secure RTP For encryption, th
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21.3.3 Usage Restrictions Using Sec
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Using Secure RTP QOSTYPE_SEC_MKI_NO
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21.8 Use Case for Secure RTP Figure
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} MediaInfo.MediaData[1].eMediaType
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Building Applications libpthread.so
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23.2 I/O (Input/Output) Functions T
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Function Summary by Category Table
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ipm_Close( ) close an IP channel de
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ipm_DisableEvents( ) disable IP not
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IPMEV_ERROR Indicates that the func
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ipm_EnableEvents( ) enable IP notif
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IPMEV_ERROR Indicates that the func
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ipm_GenerateIFrame( ) generate an I
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} � See Also None. void CheckEven
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etrieve capability (for example, co
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ipm_GetCTInfo( ) return information
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ipm_GetLocalMediaInfo( ) retrieve p
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EIPM_SYSTEM System error � Exampl
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ipm_GetParm( ) retrieve the current
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} retrieve the current value of a p
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� Cautions None. � Errors retri
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ipm_GetQoSThreshold( ) retrieve QoS
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} retrieve QoS alarm threshold sett
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ipm_GetSessionInfo( ) retrieve stat
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} } /* . . Perform Error Processing
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ipm_GetSessionInfoEx( ) retrieve RT
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etrieve RTCP data for a session —
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ipm_GetXmitSlot( ) return TDM time
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} /* . . . continue . . */ return T
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� Cautions None. � Errors send
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send a response to an Nb UP invitat
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{ send a response to an Nb UP invit
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� Cautions None. � Errors send
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send an Nb UP initialization messag
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send an Nb UP initialization messag
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IPMEV_ERROR Indicates the function
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ipm_ModifyMedia( ) modify propertie
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modify properties of active media s
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} /* . . continue processing . */
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� Termination Events open an IP c
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ipm_ReceiveDigits( ) enable the IP
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} /* . . Main Processing . . */ ena
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ipm_ResetQoSAlarmStatus( ) reset Qo
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} /* . . Continue Processing . . */
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� Errors The function returns an
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} � See Also generate master and
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� Errors generate digits to the T
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ipm_SetParm( ) set value for specif
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void CheckEvent() { int nEventType
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� Cautions change QoS alarm thres
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ipm_StartMedia( ) set media propert
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EIPM_SYSTEM System error set media
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set media properties and start the
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� Cautions None � Errors stop o
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ipm_UnListen( ) stop listening to t
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} /* . . Continue processing . . */
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Events IPMEV_GET_LOCAL_MEDIA_INFO S
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Events IPMEV_SEND_DIGITS Successful
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Data Structures IPM_QOS_ALARM_DATA
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channel/time slot device informatio
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audio coder properties used in an I
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audio coder properties used in an I
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audio coder options — IPM_AUDIO_C
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IPM_CLOSE_INFO reserved for future
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IPM_ENDPOINTID_INFO endpoint ID inf
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IPM_EVENT_INFO used for IP event no
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IPM_IFRAME_INFO retrieve I-Frame in
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IPM_INIT_RECEIVED inbound IP initia
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IPM_INIT_SEND IP initialization mes
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parent of port and coder info struc
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IPM_MEDIA_INFO parent of IP_MEDIA,
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IPM_NBUP_INIT_FAILURE Nb UP protoco
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IPM_NBUP_INIT_RESPONSE response to
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IPM_NBUP_NACK_SENT NACK response to
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IPM_NBUP_PROFILE_INFO type of Nb UP
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IPM_NBUP_SUBFLOW_INFO attributes of
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IPM_PARM_INFO used to set or retrie
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used to set or retrieve parameters
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used to set or retrieve parameters
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IPM_QOS_ALARM_DATA data associated
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parent of QoS alarm data, contains
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QoS alarm threshold settings for an
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QoS alarm threshold settings for an
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IPM_RTCP_SESSION_INFO session infor
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IPM_SECURITY_BASE64_KEY Base64-enco
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IPM_SECURITY_INFO security informat
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contains security key info — IPM_
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IPM_SESSION_INFOEX RTCP data typede
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typedef enum { IPM_CRYPTO_AES_CM_12
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IPM_TELEPHONY_EVENT_INFO details of
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IPM_TELEPHONY_INFO telephony inform
Page 293 and 294:
IPM_VIDEO_CODER_INFO video coder pr
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additional video coder properties
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SC_TSINFO TDM bus (CT Bus) time slo
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Error Codes EIPM_INV_DEVNAME Invali
Page 301 and 302:
International Telecommunications Un
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