Dialogic DIALOGIC MULTIMEDIA SOFTWARE FOR ADVANCEDTCA RELEASE 1.0 Manual Do Utilizador

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Dialogic Corporation

unParm1 

set to a value from the eIPM_CODER_OPTION_PARMS enumeration

For AMR, set to 0. 

For EVRC, where the media type is 
MEDIATYPE_AUDIO_REMOTE_CODER_OPTIONS_INFO, valid value is: 

CODER_OPT_INTERLEAVE_LENGTH - Reduce the listener’s perception of data loss 
by spreading such a loss over non-consecutive vocoder frames. 

CODER_OPT_CDMA_RATE_REDUC - Rate reduction. Bit rate is varied to achieve a 
variety of average bit rates for more flexibility in bandwidth usage.

nValue1 

The value set here is for the parameter specified in unParm1. 

For AMR, set to 0. 

For EVRC, where unParm1=CODER_OPT_INTERLEAVE_LENGTH, possible values are in 
the range 0 to 7. The default value is 0. 

For EVRC, where unParm1=CODER_OPT_CDMA_RATE_REDUC, possible values are 0 
and 4. Default value is 0. 

unParm2 

For AMR, set to 0.

For EVRC, set to 0. 

nValue2 

For AMR, set to 0.

For EVRC, set to 0. 

„

The following code example shows how to set options when using an EVRC coder type: 

... /* Setup IP address here */ 

// Local Audio Coder 

ipmMediaInfo.MediaData[unCount].eMediaType = MEDIATYPE_AUDIO_LOCAL_CODER_INFO; 
ipmMediaInfo.MediaData[unCount].mediaInfo.AudioCoderInfo.eCoderType = CODER_TYPE_EVRC;
ipmMediaInfo.MediaData[unCount].mediaInfo.AudioCoderInfo.eFrameSize = CODER_FRAMESIZE_20; 
ipmMediaInfo.MediaData[unCount].mediaInfo.AudioCoderInfo.unFramesPerPkt = 2; 
ipmMediaInfo.MediaData[unCount].mediaInfo.AudioCoderInfo.eVadEnable = CODER_VAD_DISABLE;
ipmMediaInfo.MediaData[unCount].mediaInfo.AudioCoderInfo.unCoderPayloadType = 96; 
ipmMediaInfo.MediaData[unCount].mediaInfo.AudioCoderInfo.unRedPayloadType = 0;

unCount++;

// Remote Audio Coder 

ipmMediaInfo.MediaData[unCount].eMediaType = MEDIATYPE_AUDIO_REMOTE_CODER_INFO; 
ipmMediaInfo.MediaData[unCount].mediaInfo.AudioCoderInfo.eCoderType = CODER_TYPE_EVRC; 
ipmMediaInfo.MediaData[unCount].mediaInfo.AudioCoderInfo.eFrameSize = CODER_FRAMESIZE_20; 
ipmMediaInfo.MediaData[unCount].mediaInfo.AudioCoderInfo.unFramesPerPkt = 2; 
ipmMediaInfo.MediaData[unCount].mediaInfo.AudioCoderInfo.eVadEnable = CODER_VAD_DISABLE; 
ipmMediaInfo.MediaData[unCount].mediaInfo.AudioCoderInfo.unCoderPayloadType = 96; 
ipmMediaInfo.MediaData[unCount].mediaInfo.AudioCoderInfo.unRedPayloadType = 0 ;

unCount++;