#!/bin/sh

# Slackware build script for ffmpeg4

# Copyright 2018 Andreas Guldstrand
# All rights reserved.
# Copyright (c) 2020-2021 Christoph Willing   Brisbane/Australia
# 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.

PRGNAM=ffmpeg4
SRCNAM=ffmpeg
VERSION=${VERSION:-4.3.2}
BUILD=${BUILD:-1}
TAG=${TAG:-_SBo}

if [ -z "$ARCH" ]; then
  case "$( uname -m )" in
    i?86) ARCH=i586 ;;
    arm*) ARCH=arm ;;
       *) ARCH=$( uname -m ) ;;
  esac
fi

CWD=$(pwd)
TMP=${TMP:-/tmp/SBo}
PKG=$TMP/package-$PRGNAM
OUTPUT=${OUTPUT:-/tmp}

if [ "$ARCH" = "i586" ]; then
  SLKCFLAGS="-O2 -march=i586 -mtune=i686"
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "i686" ]; then
  SLKCFLAGS="-O2 -march=i686 -mtune=i686"
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "x86_64" ]; then
  SLKCFLAGS="-O2 -fPIC"
  LIBDIRSUFFIX="64"
else
  SLKCFLAGS="-O2"
  LIBDIRSUFFIX=""
fi

enable() {
  VAR="$1"; shift
  DEF="$1"; shift
  YES="$1"; shift
  NO="$1"; shift
  eval "$VAR=\${$VAR:-$DEF}"
  eval "enable_$VAR=\"$NO\""
  eval "[ \"\$$VAR\" = \"yes\" ] && enable_$VAR=\"$YES\""
}

# set "enable_$VAR" variables
       # ENV VAR      DEFAULT    IF YES                  IF NO
enable "BINS"          "no"  ""                       "--disable-programs --disable-manpages"
enable "CHROMAPRINT"   "no"  "--enable-chromaprint"   ""
enable "CUDA"          "no"  "--enable-nonfree --enable-cuda-sdk --enable-libnpp" ""
enable "DECKLINK"      "no"  "--enable-decklink"      ""
enable "FREI0R"        "no"  "--enable-frei0r"        ""
enable "GNUTLS"        "no"  "--enable-gnutls"        ""
enable "LADSPA"        "no"  "--enable-ladspa"        ""
enable "LIBAOM"        "yes"  "--enable-libaom"        ""
enable "LIBBLURAY"     "no"  "--enable-libbluray"     ""
enable "LIBBS2B"       "no"  "--enable-libbs2b"       ""
enable "LIBCACA"       "yes" "--enable-libcaca"       ""
enable "LIBCDIO"       "yes" "--enable-libcdio"       ""
enable "LIBCELT"       "no"  "--enable-libcelt"       ""
enable "LIBDC1394"     "no"  "--enable-libdc1394"     ""
enable "LIBFDK_AAC"    "no"  "--enable-nonfree --enable-libfdk_aac" ""
enable "LIBFLITE"      "no"  "--enable-libflite"      ""
enable "LIBFONTCONFIG" "yes" "--enable-libfontconfig" ""
enable "LIBFREETYPE"   "yes" "--enable-libfreetype"   ""
enable "LIBFRIBIDI"    "yes" "--enable-libfribidi"    ""
enable "LIBGME"        "no"  "--enable-libgme"        ""
enable "LIBGSM"        "no"  "--enable-libgsm"        ""
enable "LIBIEC61883"   "no"  "--enable-libiec61883"   ""
enable "LIBILBC"       "no"  "--enable-libilbc"       ""
enable "LIBMODPLUG"    "no"  "--enable-libmodplug"    ""
enable "LIBMP3LAME"    "no"  "--enable-libmp3lame"    ""
enable "LIBOPENCORE"   "no"  "--enable-libopencore-amrnb --enable-libopencore-amrwb" ""
enable "LIBOPENCV"     "no"  "--enable-libopencv"     ""
enable "LIBOPENJPEG"   "yes" "--enable-libopenjpeg"   ""
enable "LIBOPUS"       "no"  "--enable-libopus"       ""
enable "LIBPULSE"      "yes" "--enable-libpulse"      ""
enable "LIBRTMP"       "no"  "--enable-librtmp"       ""
enable "LIBRUBBERBAND" "no"  "--enable-librubberband" ""
enable "LIBSMBCLIENT"  "yes" "--enable-libsmbclient"  ""
enable "LIBSNAPPY"     "no"  "--enable-libsnappy"     ""
enable "LIBSPEEX"      "no"  "--enable-libspeex"      ""
enable "LIBSSH"        "yes" "--enable-libssh"        ""
enable "LIBTESSERACT"  "no"  "--enable-libtesseract"  ""
enable "LIBTHEORA"     "yes" "--enable-libtheora"     ""
enable "LIBTWOLAME"    "no"  "--enable-libtwolame"    ""
enable "LIBV4L2"       "yes" "--enable-libv4l2"       ""
enable "LIBVIDSTAB"    "no"  "--enable-libvidstab"    ""
enable "LIBVORBIS"     "yes" "--enable-libvorbis"     ""
enable "LIBVPX"        "yes" "--enable-libvpx"        ""
enable "LIBWAVPACK"    "yes" "--enable-libwavpack"    ""
enable "LIBWEBP"       "yes"  "--enable-libwebp"       ""
enable "LIBX264"       "yes"  "--enable-libx264"       ""
enable "LIBX265"       "yes"  "--enable-libx265"       ""
enable "LIBXVID"       "no"  "--enable-libxvid"       ""
enable "LIBZMQ"        "no"  "--enable-libzmq"        ""
enable "LIBZVBI"       "no"  "--enable-libzvbi"       ""
enable "OPENAL"        "no"  "--enable-openal"        ""
enable "OPENGL"        "yes" "--enable-opengl"        ""
enable "OPENSSL"       "yes" "--enable-nonfree --enable-openssl" ""

[ "$DECKLINK" = "yes" ] && SLKCFLAGS="$SLKCFLAGS -I/usr/include/decklink"

set -e

rm -rf $PKG
mkdir -p $TMP $PKG $OUTPUT
cd $TMP
rm -rf $SRCNAM-$VERSION
tar xvf $CWD/$SRCNAM-$VERSION.tar.bz2
cd $SRCNAM-$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 \
 \( -perm 666 -o -perm 664 -o -perm 640 -o -perm 600 -o -perm 444 \
  -o -perm 440 -o -perm 400 \) -exec chmod 644 {} \;

CFLAGS="$SLKCFLAGS" \
CXXFLAGS="$SLKCFLAGS" \
./configure \
  --prefix=/usr \
  --libdir=/usr/lib${LIBDIRSUFFIX}/ffmpeg4 \
  --mandir=/usr/man \
  --docdir=/usr/doc/$PRGNAM-$VERSION/html \
  --incdir=/usr/include/ffmpeg4 \
  --datadir=/usr/share/ffmpeg4 \
  --enable-rpath \
  --disable-podpages \
  --disable-txtpages \
  --arch=$ARCH \
  --enable-gpl \
  --enable-version3 \
  --enable-shared \
  --disable-static \
  --disable-debug \
  --enable-libass \
  $enable_BINS \
  $enable_CHROMAPRINT \
  $enable_CUDA \
  $enable_DECKLINK \
  $enable_FREI0R \
  $enable_GNUTLS \
  $enable_LADSPA \
  $enable_LIBAOM \
  $enable_LIBBLURAY \
  $enable_LIBBS2B \
  $enable_LIBCACA \
  $enable_LIBCDIO \
  $enable_LIBCELT \
  $enable_LIBDC1394 \
  $enable_LIBFDK_AAC \
  $enable_LIBFLITE \
  $enable_LIBFONTCONFIG \
  $enable_LIBFREETYPE \
  $enable_LIBFRIBIDI \
  $enable_LIBGME \
  $enable_LIBGSM \
  $enable_LIBIEC61883 \
  $enable_LIBILBC \
  $enable_LIBMODPLUG \
  $enable_LIBMP3LAME \
  $enable_LIBOPENCORE \
  $enable_LIBOPENCV \
  $enable_LIBOPENJPEG \
  $enable_LIBOPUS \
  $enable_LIBPULSE \
  $enable_LIBRTMP \
  $enable_LIBRUBBERBAND \
  $enable_LIBSMBCLIENT \
  $enable_LIBSNAPPY \
  $enable_LIBSPEEX \
  $enable_LIBSSH \
  $enable_LIBTESSERACT \
  $enable_LIBTHEORA \
  $enable_LIBTWOLAME \
  $enable_LIBV4L2 \
  $enable_LIBVIDSTAB \
  $enable_LIBVORBIS \
  $enable_LIBVPX \
  $enable_LIBWAVPACK \
  $enable_LIBWEBP \
  $enable_LIBX264 \
  $enable_LIBX265 \
  $enable_LIBXVID \
  $enable_LIBZMQ \
  $enable_LIBZVBI \
  $enable_OPENAL \
  $enable_OPENGL \
  $enable_OPENSSL

make
make install DESTDIR=$PKG

find $PKG -print0 | xargs -0 file | grep -e "executable" -e "shared object" | grep ELF \
  | cut -f 1 -d : | xargs strip --strip-unneeded 2> /dev/null || true

if [ "$BINS" = "yes" ]; then
  find $PKG/usr/man -type f -exec gzip -9 {} \;
  for i in $( find $PKG/usr/man -type l ) ; do ln -s $( readlink $i ).gz $i.gz ; rm $i ; done
fi

mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION
cp -a \
  Changelog CONTRIBUTING.md COPYING.GPLv2 COPYING.GPLv3 COPYING.LGPLv2.1 COPYING.LGPLv3 \
  CREDITS INSTALL.md LICENSE.md MAINTAINERS README.md RELEASE RELEASE_NOTES VERSION \
  $PKG/usr/doc/$PRGNAM-$VERSION
cat $CWD/$PRGNAM.SlackBuild > $PKG/usr/doc/$PRGNAM-$VERSION/$PRGNAM.SlackBuild

mkdir -p $PKG/install
cat $CWD/slack-desc > $PKG/install/slack-desc

cd $PKG
/sbin/makepkg -l y -c n $OUTPUT/$PRGNAM-$VERSION-$ARCH-$BUILD$TAG.${PKGTYPE:-tgz}