[Asterisk-Users] rxfax/spandsp fails to decode

[Stephen J. Wilcox]

Hi,
 I just sent this to Steve Underwood, but then found a bunch of posts on the
mailing list about similar issues.. does anyone have the fix?

I'm running asterisk CVS-HEAD-06/28/04-18:13:13, spandsp 0.0.1k, libtif 3.5.7

one thing i just noticed is that calls come in with format '72' which is
G711A-law or LinearPCM.. it uses PCM for the call, i assume this is ok

the results of RxFAX vary, it sometimes saves the file in which case i get 
errors: 
Fax3Decode2D: Warning, (FakeInput): Line length mismatch at scanline 0 (got 
2383, expected 1728).
Fax3Decode2D: (FakeInput): Bad code word at scanline 1 (x 137).

and the resulting tif looks to be only a few rows long

or more commonly it just fails entirely.. i paste the output below so you can 
see. is there anything obvious i'm doign wrong here?

TIA! Steve.

    -- Executing RxFAX("Zap/1-1", 
"/var/spool/asterisk/faxes/20040712-183339.tif") in new stack
Changed from phase 0 to 1
Start receiving document
Changed from phase 1 to 4
Sending ident
>>> CSI: 40 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20
DIS:
Preferred octets: 256
Can receive fax
Supported data signalling rates: V.27ter and V.29
R8x7.7lines/mm and/or 200x200pels/25.4mm OK
2D coding OK
Scan line length: 215mm
Recording length: A4 (297mm)
Receiver's minimum scan line time: 0ms at 3.85 l/mm: T7.7 = T3.85
R8x15.4lines/mm OK
Minimum scan line time for higher resolutions: T15.4 = T7.7
>>> DIS: 80 00 ce f0 80 80 01
HDLC underflow in state 9
Changed from phase 4 to 3
Slow carrier up
<<< TSI: 43 31 37 31 31 36 35 34 35 34 38 30 20 20 20 20 20 20 20 20 20
TSI without final frame tag
Remote fax gave TSI as: "xxxx"
<<< DCS: 83 00 86 90 00
DCS with final frame tag
In state 9
DCS:
Can receive fax
Selected data signalling rate: V.29, 9600bps
2D coding OK
Scan line length: 215mm
Recording length: A4 (297mm)
Minimum scan line time: 5ms
Get at 9600
Changed from phase 3 to 5
Fast carrier up
Fast carrier down
Fast carrier up
Coarse carrier frequency 1699.90 (64)
Training error 56.874846
Training succeeded (constellation mismatch 44.212022)
Fast carrier trained
Fast carrier down
Trainability test failed - longest run of zeros was 14
>>> FTT: 44
Fast carrier up
Training failed (sequence failed)
Fast carrier training failed
Fast carrier down
Fast carrier up
Coarse carrier frequency 1700.33 (64)
Training error 51.989152
Training succeeded (constellation mismatch 37.988826)
Fast carrier trained
Fast carrier down
Trainability test failed - longest run of zeros was 15
>>> FTT: 44
Fast carrier up
Training failed (sequence failed)
Fast carrier training failed
Fast carrier down
Fast carrier up
Coarse carrier frequency 1700.32 (64)
Training error 60.898646
Training succeeded (constellation mismatch 46.138793)
Fast carrier trained
Fast carrier down
Trainability test failed - longest run of zeros was 17
>>> FTT: 44
Fast carrier up
Training failed (sequence failed)
Fast carrier training failed
Fast carrier down
Fast carrier up
Coarse carrier frequency 1795.61 (4)
Fast carrier down
Fast carrier up
Coarse carrier frequency 1789.60 (4)
Fast carrier down
    -- Channel 0/1, span 1 got hangup
    -- Hungup 'Zap/1-1'