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Voice API for Windows Operating Systems Library Reference — November 2003 255
get echo cancellation resource transmit time slot number — dx_getxmitslotecr( )
dx_getxmitslotecr( )
get echo cancellation resource transmit time slot number
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! Description
The dx_getxmitslotecr( ) function returns the transmit time slot number assigned to the echo
cancellation resource (ECR) of the specified voice channel device. The time slot information is
contained in an SC_TSINFO structure. For more information on this structure, see SC_TSINFO,
on page 529.
Note: The ECR functions have been replaced by the continuous speech processing (CSP) API functions.
CSP provides enhanced echo cancellation. For more information, see the Continuous Speech
Processing API Programming Guide and Continuous Speech Processing API Library Reference.
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! Cautions
This function fails when:
• An invalid channel device handle is specified.
• The ECR feature is not enabled on the board specified.
• The ECR feature is not supported on the board specified.
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! Errors
If the function returns -1, use the Standard Runtime Library (SRL) Standard Attribute function
ATDV_LASTERR( ) to obtain the error code or use ATDV_ERRMSGP( ) to obtain a descriptive
error message. One of the following error codes may be returned:
EDX_BADPARM
Parameter error
Name: int dx_getxmitslotecr(chdev, sc_tsinfop)
Inputs: int chdev
• valid channel device handle
SC_TSINFO *sc_tsinfop
• pointer to TDM bus time slot information structure
Returns: 0 on success
-1 on error
Includes: srllib.h
dxxxlib.h
Category: Echo Cancellation Resource
Mode: synchronous
Platform: Springware
Parameter Description
chdev specifies the voice channel device handle obtained when the channel was
opened using dx_open( )
sc_tsinfop specifies a pointer to the data structure SC_TSINFO