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spandsp: disable fixed point implementation

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On a Netgear R7000 (ARMv7) without floating point, using SpanDSP with
fixed point to send/receive fax on Asterisk resulted in repeated
failure and intermittent performance.  Disabling fixed point fixed
these issues; the software floating point implementation was fine for
real-time use.

Now on a Netgear R7800 (ARMv7) with hardware floating point, the
autoconf auto-detect will say no floating point is available, and
again enables the poor performing fixed point implementation.  Ouch!
This commit is contained in:
John Papandriopoulos 2017-05-28 19:24:59 -07:00 committed by John Papandriopoulos
parent 3cce8976b1
commit b57051c35d
2 changed files with 15 additions and 1 deletions
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2
libs/spandsp/Makefile
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@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
PKG_NAME:=spandsp
PKG_VERSION:=0.0.6
PKG_RELEASE:=2
PKG_RELEASE:=3
PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
PKG_SOURCE_URL:=http://www.soft-switch.org/downloads/spandsp/

14
libs/spandsp/patches/101-disable-fixed-point.patch Executable file
View file

@ -0,0 +1,14 @@
--- a/configure.ac
+++ b/configure.ac
@@ -435,10 +435,7 @@ if test "$enable_fixed_point" = "yes" ; then
AC_DEFINE([SPANDSP_USE_FIXED_POINT], [1], [Enable fixed point processing, where possible, instead of floating point])
SPANDSP_USE_FIXED_POINT="#define SPANDSP_USE_FIXED_POINT 1"
else
- AX_FIXED_POINT_MACHINE([$host],
- [AC_DEFINE([SPANDSP_USE_FIXED_POINT], [1], [Enable fixed point processing, where possible, instead of floating point])
- SPANDSP_USE_FIXED_POINT="#define SPANDSP_USE_FIXED_POINT 1"],
- [SPANDSP_USE_FIXED_POINT="#undef SPANDSP_USE_FIXED_POINT"])
+ SPANDSP_USE_FIXED_POINT="#undef SPANDSP_USE_FIXED_POINT"]
fi
AX_MISALIGNED_ACCESS_FAILS([$host],
[AC_DEFINE([SPANDSP_MISALIGNED_ACCESS_FAILS], [1], [Do not expect a misaligned memory access to work correctly])