freeswitch

History

Andrey Volk 40668f6b1c FS-10501: [mod_spandsp] Fix building spandsp lib on windows.		2017-07-14 19:59:42 +03:00
..
config	add to make sure config dir is there for AC_CONFIG_AUX_DIR	2012-07-02 17:46:21 -04:00
debian
doc	Improvements to image translation	2012-08-14 22:32:30 +08:00
m4	spandsp DSP tweaks to avoid problems with the LPC10 code compiled with the latest GCC 6.2 series compilers. Various other additional tweaks to spandsp.	2017-07-14 00:29:20 +01:00
spandsp	The band filter for G.722 could cause numerical overflow in unusual circumstances with the maximum possiblke signal level. The filter output is now saturated to 16 bits to avoid this.	2016-08-31 23:59:32 +08:00
spandsp-sim	Various little cleanups in spandsp	2015-06-18 21:15:41 +08:00
src	FS-10501: [mod_spandsp] Fix building spandsp lib on windows.	2017-07-14 19:59:42 +03:00
test-data	Various little cleanups in spandsp	2015-06-18 21:15:41 +08:00
tests	spandsp DSP tweaks to avoid problems with the LPC10 code compiled with the latest GCC 6.2 series compilers. Various other additional tweaks to spandsp.	2017-07-14 00:29:20 +01:00
.gitignore	libs/spandsp/.gitignore: added temporary files in test-data	2015-09-09 21:39:18 +00:00
.update	bump	2014-07-22 07:26:04 -05:00
AUTHORS
autogen.sh	Fixed V.22bis fixed point builds	2012-08-05 18:39:41 +08:00
ChangeLog
configure.ac	spandsp DSP tweaks to avoid problems with the LPC10 code compiled with the latest GCC 6.2 series compilers. Various other additional tweaks to spandsp.	2017-07-14 00:29:20 +01:00
configure.gnu	FS-10074: [libtiff] stop using embedded libtiff. Build now requires system libtiff	2017-03-14 18:29:37 -05:00
COPYING
DueDiligence
Makefile.am	Tweaks to spandsp configuration	2013-09-01 00:36:48 +08:00
NEWS
README	Allow writing of T.85 format TIFF files	2013-04-13 01:46:14 +08:00
README.testdata
spandsp.pc.in	Various little tweaks to spandsp to stop warnings with newer compilers	2012-07-02 21:31:04 +08:00
spandsp.spec	Tweaks to spandsp configuration	2013-09-01 00:36:48 +08:00
spandsp.spec.in	Various little tweaks to spandsp to stop warnings with newer compilers	2012-07-02 21:31:04 +08:00
unpack_g722_data.sh	Moved spandsp to a more recent version. A huge number of little changes occur here, as recently spandsp	2010-07-25 03:29:44 +08:00
unpack_g726_data.sh	Moved spandsp to a more recent version. A huge number of little changes occur here, as recently spandsp	2010-07-25 03:29:44 +08:00
unpack_gsm0610_data.sh	Various small cleanups in spandsp	2014-05-07 13:11:53 +08:00
unpack_v56ter_data.sh	Moved spandsp to a more recent version. A huge number of little changes occur here, as recently spandsp	2010-07-25 03:29:44 +08:00
wrapper.xsl	Numerous little changes to spandsp that haven't been pushed to Freeswitch for a	2011-07-02 14:45:27 +08:00
yum-prepare.sh	Various small cleanups in spandsp	2014-05-07 13:11:53 +08:00

README

spandsp 0.0.6 - A DSP library for telephony
-------------------------------------------

SpanDSP is a library of DSP functions for telephony, in the 8000 sample per
second world of E1s, T1s, and higher order PCM channels. It contains low level
functions, such as basic filters. It also contains higher level functions, such
as cadenced supervisory tone detection, and a complete software FAX machine.
The software has been designed to avoid intellectual property issues, using
mature techniques where all relevant patents have expired. See the file
DueDiligence for important information about these intellectual property issues.

The library is licenced under the LGPL 2.1 licence. The test suite, and some support
programs are licenced under the GPL 2 licence. The full text of these licences can
be found in the file COPYING.

Dependencies
------------

spandsp depends on various other packages for various tasks. Most of these
dependencies relate to building the test suite.

libtiff (and libtiff-devel on most Linux distributions) is required to
build the spandsp library.

libaudiofile (and libaudiofile-devel) is required to build the test suite
fftw (and fftw-devel) is required to build the test suite. Version 2 or 3 of
FFTW may be used. Spandsp adapts to the differences between them.

fltk (and fltk-devel), Fl_Cartesian and Fl_Audio_Meter are required to build
the test suite with GUI interfaces for some of the tests. The tests will build
without these packages, but the GUI features will not be available.
Fl_Cartesian and Fl_Audio_Meter can be downloaded from
http://www.soft-switch.org/downloads.

Steve Underwood <steveu@coppice.org>