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This is a test version of spandsp-0.0.2
If you want a stable version, don't use this one. The app_rxfax.c and app_txfax.c programs in this directory will only work with spandsp-0.0.2.
pre1 had the XML for global tones missing.
pre2 still have an XML file error. t31.c also mistakenly included audiofile.h
pre3 now has improved V.27ter and V.29 receive modems.
pre11 tolerates greater timing error between the near and far modems, to
make things works when the modem clocks are out of spec.
pre15 tolerates far end V.29 modems which send TEP rather better.
pre16 slight improvements to build environment checks. A possibility of
divide by zero has been eliminated in V.17, V.27ter, and V.29.
pre17 various cleanups in the build process.
a bit more documentation
the modems now support TEP
T.30 has had a few tweaks.
Some getting ready to split T.30 from the higher layers of faxing, so
T.38 fits in nicely.
pre18 fixed the resolution of T.4 images. X & Y resolutions were the same
before. They should actually be slightly asymetric. rxfax and txfax now
allow logging to be controlled from their command lines. txfax also allows
access to the header line feature of spandsp's fax machine.
pre19 compiles cleanly for x86_64 machines. V.29 modem is more tolerant of
signals with poor symbol timing
pre20 memory should now be cleaned up properly at the end of a FAX. There was a
lot of memory leaking before. The build process has been tidied a little.
Spandsp now uses inttypes.h instead of stdint.h, following portability
recommendations in the autoconf documentation.
pre21 various cleanup. T.31 support is now largely functional. Fast AWGN added.
G.722 (64kbps only) added. Builds the library with -g correctly (there
was a typo stoppin debug builds before).Very few fprintfs now left.
Most things now use span_log for logging. HDLC now more flexible.
pre22 added much of the stuff from 0.0.3, except for the T.38 related massive
reworking of how FAX is handled. The FAX modems now use the correct
spectral shaping. The initial exchange timeout (T0) has been backported
from 0.0.3. The FAX API has been made more like the 0.0.3 one, to try
to smooth the transition.
pre23 fixed up some silly errors in pre22.
pre24 fixed an error in T.4 processing, causing a sideways shift with some
sending FAX machines (e.g. some Canons).
pre25 fixed a silly error in the generation of single tones.
BUILDING AND INSTALLING SPANDSP AS A FAX MACHINE FOR ASTERISK
See http://www.soft-switch.org/installing-spandsp.html for instructions on how
to build and install this software.
Regards,
Steve
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