#!/bin/sh

# Slackware build script for ffmpeg
# Written by Konstantinos Mantzaris (kmanjaris@gmail.com)

# Copyright 2014 Konstantinos Mantzaris <kmanjaris@gmail.com>
# All rights reserved.
#
# Redistribution and use of this script, with or without modification, is
# permitted provided that the following conditions are met:
#
# 1. Redistributions of this script must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ''AS IS'' AND ANY EXPRESS OR IMPLIED
# WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
# EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
# OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
# OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
# ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.


PKGNAM=ffmpeg
PKGVER=1.2
VERSION=1.2
BUILD=${BUILD:-2}
TAG=${TAG:-xsb}

# Automatically determine the architecture we're building on:
if [ -z "$ARCH" ]; then
  case "$( uname -m )" in
    i?86) export ARCH=i486 ;;
    arm*) export ARCH=arm ;;
    # Unless $ARCH is already set, use uname -m for all other archs:
       *) export ARCH=$( uname -m ) ;;
  esac
fi

if [ "$ARCH" = "i486" ]; then
  SLKCFLAGS="-O2 -march=i486 -mtune=i686"
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "i686" ]; then
  SLKCFLAGS="-O2 -march=i686 -mtune=i686"
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "s390" ]; then
  SLKCFLAGS="-O2"
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "x86_64" ]; then
  SLKCFLAGS="-O2 -fPIC"
  LIBDIRSUFFIX="64"
elif [ "$ARCH" = "arm" ]; then
  SLKCFLAGS="-O2 -pipe -mcpu=arm1176jzf-s -mtune=arm1176jzf-s -mfpu=vfp -mfloat-abi=softfp -Wno-psabi -lGLESv2"
  SLKINCFLAGS="/opt/vc/include:/opt/vc/include/interface/vcos:/usr/include/interface/vcos/pthreads"
  LIBDIRSUFFIX=""
fi

CWD=$(pwd)
TMP=${TMP:-/tmp}
PKG=$TMP/package-$PKGNAM

#if [ ! "$(ls /usr/lib/xbmc/system/players/dvdplayer/ | grep avcodec)" = "" ] ; then
#  echo "WARNING : FFMPEG is already installed as part of XBMC"
#  echo -n "Press Y to proceed nevertheless...: "; read ans
#  if [ ! $ans = "Y" ] && [ ! $ans = "y" ] ; then exit 1 ; fi
#fi
rm -rf $PKG
mkdir -p $TMP $PKG
cd $CWD

# Configure:
CFLAGS="$SLKCFLAGS" \
CXXFLAGS="$SLKCFLAGS" \
C_INCLUDE_PATH="$SLKINCFLAGS" \
CPLUS_INCLUDE_PATH="$SLKINCFLAGS" \
./configure \
  --prefix=/usr \
  --libdir=/usr/lib${LIBDIRSUFFIX} \
  --mandir=/usr/man \
  --enable-memalign-hack \
  --enable-gpl \
  --enable-nonfree \
  --enable-postproc \
  --enable-version3 \
  --enable-libpulse \
  --enable-libcdio \
  --enable-libass \
  --enable-libfreetype \
  --enable-libmodplug \
  --enable-libmp3lame \
  --enable-libspeex \
  --enable-libtheora \
  --enable-libvorbis \
  --enable-openssl \
  --enable-zlib \
  --enable-librtmp \
  --enable-vaapi \
  --enable-hwaccel=h263_vaapi \
  --enable-hwaccel=h264_vaapi \
  --enable-hwaccel=mpeg2_vaapi \
  --enable-hwaccel=mpeg4_vaapi \
  --enable-hwaccel=vc1_vaapi \
  --enable-hwaccel=wmv3_vaapi \
  --disable-static \
  --enable-shared \
  --enable-pthreads \
  --arch=$ARCH

# Build and install:
make || exit 1
make install DESTDIR=$PKG || exit 1

# Strip binaries:
( cd $PKG
  find . | xargs file | grep "executable" | grep ELF | cut -f 1 -d : | xargs strip --strip-unneeded 2> /dev/null
  find . | xargs file | grep "shared object" | grep ELF | cut -f 1 -d : | xargs strip --strip-unneeded 2> /dev/null
)

# Compress and link manpages, if any:
if [ -d $PKG/usr/man ]; then
  ( cd $PKG/usr/man
    for manpagedir in $(find . -type d -name "man*") ; do
      ( cd $manpagedir
        for eachpage in $( find . -type l -maxdepth 1) ; do
          ln -s $( readlink $eachpage ).gz $eachpage.gz
          rm $eachpage
        done
        gzip -9 *.?
      )
    done
  )
fi

# Compress info files, if any:
if [ -d $PKG/usr/info ]; then
  ( cd $PKG/usr/info
    rm -f dir
    gzip -9 *
  )
fi

# Add a documentation directory:
mkdir -p $PKG/usr/doc/${PKGNAM}-$VERSION
cp -a \
  AUTHORS COPYING* INSTALL NEWS README TODO \
  $PKG/usr/doc/${PKGNAM}-$VERSION

# If there's a ChangeLog, installing at least part of the recent history
# is useful, but don't let it get totally out of control:
if [ -r ChangeLog ]; then
  DOCSDIR=$(echo $PKG/usr/doc/${PKGNAM}-$VERSION)
  cat ChangeLog | head -n 1000 > $DOCSDIR/ChangeLog
  touch -r ChangeLog $DOCSDIR/ChangeLog
fi

mkdir -p $PKG/install
if [ "$ARCH" = "arm" ]; then LIBDIRSUFFIX="rpi"; fi
cat $CWD/slack-desc${LIBDIRSUFFIX} > $PKG/install/slack-desc

# Build the package:
cd $PKG
/sbin/makepkg -l y -c n $TMP/$PKGNAM-$VERSION-$ARCH-$BUILD$TAG.txz