LINEMEDIACONTROLMEDIA

The LINEMEDIACONTROLMEDIA structure describes a media action to be executed when detecting a media mode change. It is used as an entry in an array.

typedef struct linemediacontrolmedia_tag {
    DWORD  dwMediaModes;
    DWORD  dwDuration;
    DWORD  dwMediaControl;
} LINEMEDIACONTROLMEDIA, FAR *LPLINEMEDIACONTROLMEDIA; 
 

Members

dwMediaModes

One or more media modes. This member uses the following LINEMEDIAMODE_ constants:

LINEMEDIAMODE_UNKNOWN

A media stream exists but its mode is not known. This would correspond to a call with an unclassified media type. In typical analog telephony environments, an incoming call's media mode may be unknown until after the call has been answered and the media stream filtered to make a determination.

LINEMEDIAMODE_INTERACTIVEVOICE

The presence of voice energy on the call and the call is treated as an interactive call with humans on both ends.

LINEMEDIAMODE_AUTOMATEDVOICE

The presence of voice energy on the call and the voice is locally handled by an automated application.

LINEMEDIAMODE_DATAMODEM

A data modem session on the call.

LINEMEDIAMODE_G3FAX

A group 3 fax is being sent or received over the call.

LINEMEDIAMODE_G4FAX

A group 4 fax is being sent or received over the call.

LINEMEDIAMODE_TDD

A TDD (Telephony Devices for the Deaf) session on the call.

LINEMEDIAMODE_DIGITALDATA

Digital data is being sent or received over the call.

LINEMEDIAMODE_TELETEX

A teletex session on the call. Teletex is one of the telematic services.

LINEMEDIAMODE_VIDEOTEX

A videotex session on the call. Videotex is one of the telematic services.

LINEMEDIAMODE_TELEX

A telex session on the call. Telex is one of the telematic services.

LINEMEDIAMODE_MIXED

A mixed session on the call. Mixed is one of the ISDN telematic services.

LINEMEDIAMODE_ADSI

An ADSI (Analog Display Services Interface) session on the call.

LINEMEDIAMODE_VOICEVIEW

The media mode of the call is VoiceView.

dwDuration

The duration in milliseconds during which the media mode should be present before the application should be notified or media control action should be taken.

dwMediaControl

The media control action. This member uses the following LINEMEDIACONTROL_ constants:

LINEMEDIACONTROL_NONE

No change is to be made to the media stream.

LINEMEDIACONTROL_RESET

Reset the media stream. Equivalent to an end-of-input. All buffers are released.

LINEMEDIACONTROL_PAUSE

Temporarily pause the media stream.

LINEMEDIACONTROL_RESUME

Start or resume a paused media stream.

LINEMEDIACONTROL_RATEUP

The speed of the media stream is increased by some stream-defined quantity.

LINEMEDIACONTROL_RATEDOWN

The speed of the media stream is decreased by some stream-defined quantity.

LINEMEDIACONTROL_RATENORMAL

The speed of the media stream is returned to normal.

LINEMEDIACONTROL_VOLUMEUP

The amplitude of the media stream is increased by some stream-defined quantity.

LINEMEDIACONTROL_VOLUMEDOWN

The amplitude of the media stream is decreased by some stream-defined quantity.

LINEMEDIACONTROL_VOLUMENORMAL

The amplitude of the media stream is returned to normal.

Remarks

No extensions.

The LINEMEDIACONTROLMEDIA structure defines a triple <media mode(s), duration, media-control action>. An array of these triples is passed to the lineSetMediaControl function to set the media control actions triggered by media mode changes for a given call. When a change to a listed media mode is detected, then the corresponding action on the media stream is invoked.

QuickInfo

  Version: Use TAPI version 1.4 and later.
  Header: Declared in tapi.h.

See Also

lineSetMediaControl