LINEMEDIACONTROLDIGIT

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

typedef struct linemediacontroldigit_tag {
    DWORD  dwDigit;
    DWORD  dwDigitModes;
    DWORD  dwMediaControl;
} LINEMEDIACONTROLDIGIT, FAR *LPLINEMEDIACONTROLDIGIT; 
 

Members

dwDigit

The low-order byte of this DWORD specifies the digit in ASCII whose detection is to trigger a media action. Valid digits depend on the media mode.

dwDigitModes

The digit mode(s) that are to be monitored. This member uses the following LINEDIGITMODE_ constants:

LINEDIGITMODE_PULSE

Detect digits as audible clicks that are the result of rotary pulse sequences. Valid digits for pulse are '0' through '9'.

LINEDIGITMODE_DTMF

Detect digits as DTMF tones. Valid digits for DTMF are '0' through '9', 'A', 'B', 'C', 'D', '*', and '#'.

LINEDIGITMODE_DTMFEND

Detect and provide application notification of DTMF down edges. Valid digits for DTMF are '0' through '9', 'A', 'B', 'C', 'D', '*', and '#'.

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 <digit, digit mode(s), media-control action>. An array of these triples is passed to the lineSetMediaControl function to set the media control actions triggered by digits detected on a given call. When a listed digit 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

LINEMEDIACONTROLMEDIA, lineSetMediaControl