freeswitch

History

Steve Underwood b2cca974c1 Second attempt to fix the use of aligned_alloc with BSD		2014-02-08 22:36:29 +08:00
..
config
debian
doc
m4	Fixed poor checking for ARM NEON	2014-01-17 23:16:23 +08:00
spandsp	Tweaks to FAX modem handling. These do NOT fix the occassional crashes people	2013-12-05 21:10:57 +08:00
spandsp-sim	A cleanup of FAX image size/resolution matching accuracy. Squashing of bi-level	2013-08-06 02:38:06 +08:00
src	Second attempt to fix the use of aligned_alloc with BSD	2014-02-08 22:36:29 +08:00
test-data	Reworked some of the definition names and values in preparation for	2013-07-24 11:58:36 +08:00
tests	Removal of some pointless callback parameters in the spandsp AT command	2014-01-16 00:47:29 +08:00
.gitignore	.gitignore	2014-01-29 17:56:51 -05:00
.update
AUTHORS
autogen.sh
ChangeLog
configure.ac	Adjusted the test for -Wunused-but-set-variable in spandsp, so it gets the	2013-11-01 10:32:32 +08:00
configure.gnu
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
spandsp.spec	Tweaks to spandsp configuration	2013-09-01 00:36:48 +08:00
spandsp.spec.in
unpack_g722_data.sh
unpack_g726_data.sh
unpack_gsm0610_data.sh	FS-4751 I am leaving out the one for devel-bootstrap.sh because I am not sure it should be /usr/pkg/bin/bash	2012-10-23 12:23:19 -04:00
unpack_v56ter_data.sh
wrapper.xsl
yum-prepare.sh	Tweaks to spandsp configuration	2013-09-01 00:36:48 +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>