audio/rakarrack: Fix distortion on x86_64.

Signed-off-by: Willy Sudiarto Raharjo <willysr@slackbuilds.org>

audio/rakarrack/64bit_distortion.diff

@@ -0,0 +1,12 @@
+diff -Naur rakarrack-0.6.1/src/Waveshaper.C rakarrack-0.6.1.patched/src/Waveshaper.C
+--- rakarrack-0.6.1/src/Waveshaper.C	2010-08-22 09:41:40.000000000 -0400
++++ rakarrack-0.6.1.patched/src/Waveshaper.C	2014-01-14 23:27:09.000000000 -0500
+@@ -49,7 +49,7 @@
+     period_coeff = 8;
+     ncSAMPLE_RATE=cSAMPLE_RATE/8.0f;
+     break;
+-    case 4:
++	 default:
+     period_coeff = 12;
+     ncSAMPLE_RATE=cSAMPLE_RATE/12.0f;
+     break;

audio/rakarrack/README

@@ -1,4 +1,10 @@
-rakarrack (realtime audio effects processor)
+rakarrack (realtime audio effects processor for JACK)
 
-Rakarrack is a virtual digitial effects rack, including such effects as
+Rakarrack is a virtual digital effects rack, including such effects as
 distortion, echo, reverb, phaser, flanger, chorus, compressor, etc.
+
+This package uses POSIX filesystem capabilities to execute with
+elevated privileges (required for realtime audio processing). This
+may be considered a security/stability risk. Please read
+http://www.slackbuilds.org/caps/ for more information. To disable
+capabilities, pass SETCAP=no to the script.

audio/rakarrack/rakarrack.SlackBuild

@@ -6,9 +6,11 @@
 
 # Licensed under the WTFPL. See http://www.wtfpl.net/txt/copying/ for details.
 
+# 20140114 bkw: add 64-bit distortion fix and setcap stuff.
+
 PRGNAM=rakarrack
 VERSION=${VERSION:-0.6.1}
-BUILD=${BUILD:-1}
+BUILD=${BUILD:-2}
 TAG=${TAG:-_SBo}
 
 if [ -z "$ARCH" ]; then
@@ -48,10 +50,15 @@ tar xvf $CWD/$PRGNAM-$VERSION.tar.bz2
 cd $PRGNAM-$VERSION
 chown -R root:root .
 find -L . \
- \( -perm 777 -o -perm 775 -o -perm 750 -o -perm 711 -o -perm 555 -o -perm 511 \) \
- -exec chmod 755 {} \; -o \
- \( -perm 666 -o -perm 664 -o -perm 600 -o -perm 444 -o -perm 440 -o -perm 400 \) \
- -exec chmod 644 {} \;
+ \( -perm 777 -o -perm 775 -o -perm 750 -o -perm 711 -o -perm 555 \
+  -o -perm 511 \) -exec chmod 755 {} \; -o \
+ \( -perm 666 -o -perm 664 -o -perm 640 -o -perm 600 -o -perm 444 \
+ -o -perm 440 -o -perm 400 \) -exec chmod 644 {} \;
+
+# work around a bug that causes distorion/overdrive not to work on 64-bit.
+# this is a band-aid, not a real solution, but it seems to work OK.
+# http://sourceforge.net/p/rakarrack/discussion/778862/thread/e9559a34/
+patch -p1 < $CWD/64bit_distortion.diff
 
 CFLAGS="$SLKCFLAGS" \
 CXXFLAGS="$SLKCFLAGS" \
@@ -70,8 +77,7 @@ gzip $PKG/usr/man/man?/*.?
 
 mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION
 
-cp -a \
-  AUTHORS COPYING ChangeLog NEWS README TODO \
+cp -a AUTHORS COPYING ChangeLog NEWS README TODO \
   $PKG/usr/doc/$PRGNAM-$VERSION
 cat $CWD/$PRGNAM.SlackBuild > $PKG/usr/doc/$PRGNAM-$VERSION/$PRGNAM.SlackBuild
 
@@ -79,5 +85,13 @@ mkdir -p $PKG/install
 cat $CWD/slack-desc > $PKG/install/slack-desc
 cat $CWD/doinst.sh > $PKG/install/doinst.sh
 
+# Only add capability stuff if not disabled:
+if [ "${SETCAP:-yes}" = "yes" ]; then
+  cat $CWD/setcap.sh >> $PKG/install/doinst.sh
+  # Only allow execution by audio group
+  chown root:audio $PKG/usr/bin/$PRGNAM
+  chmod 0750 $PKG/usr/bin/$PRGNAM
+fi
+
 cd $PKG
 /sbin/makepkg -l y -c n $OUTPUT/$PRGNAM-$VERSION-$ARCH-$BUILD$TAG.${PKGTYPE:-tgz}

audio/rakarrack/rakarrack.info

@@ -5,6 +5,6 @@ DOWNLOAD="http://downloads.sourceforge.net/project/rakarrack/rakarrack/rakarrack
 MD5SUM="56b1e04779ae3d56cc8a3ad3c4e25152"
 DOWNLOAD_x86_64=""
 MD5SUM_x86_64=""
-REQUIRES="fltk qjackctl set_rlimits"
+REQUIRES="fltk jack-audio-connection-kit"
 MAINTAINER="B. Watson"
 EMAIL="yalhcru@gmail.com"

audio/rakarrack/setcap.sh

@@ -0,0 +1 @@
+[ -x /sbin/setcap ] && /sbin/setcap cap_ipc_lock,cap_sys_nice=ep usr/bin/rakarrack

audio/rakarrack/slack-desc

@@ -6,7 +6,7 @@
 # customary to leave one space after the ':' except on otherwise blank lines.
 
          |-----handy-ruler------------------------------------------------------|
-rakarrack: rakarrack (realtime audio effects processor)
+rakarrack: rakarrack (realtime audio effects processor for JACK)
 rakarrack:
 rakarrack: Rakarrack is a virtual digitial effects rack, including such effects
 rakarrack: as distortion, echo, reverb, phaser, flanger, chorus, compressor, etc.