Dialogic 6.2 Manuale Utente

Developing a Fax Application

November 2009

84

Processing, Bfv API Reference Manual for detailed information on 

how to access user-defined infopkts when using the 
INDIR_MODE_FOLLOW_NOUSER

 flag. 

Transmitting a fax stored as a TIFF-F file is accomplished using the 

TIFF-F fax routines, as described earlier in this chapter, or using an 

infopkt of type INFOPKT_INDIR_TIFF within an infopkt stream.

TIFF files contain resolution and width parameters for each page. 

However, the same rules that apply to ordinary fax data streams 

also apply to fax data streams that contain INDIR_TIFF infopkts:

„

A DOCUMENT_PARAMETERS infopkt must be the first infopkt in 

the stream, but the resolution specified by (the first page) of the 

TIFF file takes precedence over the resolution specified by the 
DOCUMENT_PARAMETERS

 infopkt. This rule is in effect only if 

INDIR_TIFF

 occurs right after the DOCUMENT_PARAMETERS or 

other infopkt types indicating beginning-of-page.

„

To insert a page break between the last page of the first file and 

the first page of the second file, one of the infopkt types that 

indicate a beginning-of-page (see Accessing an Infopkt Stream 

from an Application on page 83) must be present between 
INDIR_TIFF

 infopkts. 

„

ASCII or G3 data are combined on a single page with the first or 

last page of a TIFF file by constructing the stream with no 

new-page type infopkt between the ASCII or G3 data and the 
INDIR_TIFF

 infopkt. G3 strip parameter packets might be 

required (see Infopkts on page 42); the resolution and width of 

the G3 data in a TIFF file is always specified in the TIFF file, not 

in the G3 strip parameter packet.

Two methods exist for combining data on a single page using 

TIFF-F files. 

The first method uses an infopkt of type INFOPKT_INDIR_TIFF to 

embed a TIFF-F file in an infopkt stream, as described in Sending a