#!/bin/bash

###########################################
# Script for build FFmpeg on Cygwin x86   #
# Author: q3aql                           #
# Contact: q3aql@duck.com                 #
###########################################

# IMPORTANT
# YOU NEED INSTALL:
#  - wget
#  - git

# Build variables
dir_build="/opt/ffmpeg-builds/build/cygwin32-shared"
dir_build_libs="/opt/ffmpeg-builds/lib/cygwin32-shared"
dir_build_packages="/opt/ffmpeg-builds/packages"

# FFmpeg version
ffmpeg_package="https://ffmpeg.org/releases/ffmpeg-4.4.1.tar.bz2"
ffmpeg_package_name="ffmpeg-4.4.1.tar.bz2@ffmpeg-4.4.1"

# COMPILER VARIABLES
C_COMPILER="gcc"
CXX_COMPILER="g++"

# URL Libraries Variables
lib_x264="https://code.videolan.org/videolan/x264"
lib_x264_name="x264"

lib_x265="http://download.openpkg.org/components/cache/x265/x265_3.4.tar.gz"
lib_x265_name="x265_3.4.tar.gz@x265_3.4"

lib_xvid="https://downloads.xvid.com/downloads/xvidcore-1.3.7.tar.gz"
lib_xvid_name="xvidcore-1.3.7.tar.gz@xvidcore"

# Check root permission 
mkdir -p /etc/root &> /dev/null
administrador=$?
if [ ${administrador} -eq 0 ] ; then
  rm -rf /etc/root
else
  echo ""
  echo "* ${0}"
  echo ""
  echo "* Administrator permissions are required."
  echo ""
  exit
fi

# Create directories
mkdir -p ${dir_build}
mkdir -p ${dir_build_libs}
mkdir -p ${dir_build_packages}

# Install apt-cyg
if [ -f "/usr/bin/apt-cyg" ] ; then
  echo "* apt-cyg manager is ready"
  sleep 1
else
  cd /tmp
  git clone "https://github.com/q3aql/ffmpeg-builds"
  cd ffmpeg-builds
  cp -rfv apt-cyg /usr/bin
  echo "* apt-cyg installed"
fi

# Fix strafe.sh
if [ -f /usr/include/w32api/strsafe.h_fix ] ; then
  echo "* strsafe.h was fixed previously"
else
  cd /tmp
  git clone "https://github.com/q3aql/ffmpeg-builds"
  cd ffmpeg-builds
  cp -rfv /usr/include/w32api/strsafe.h /usr/include/w32api/strsafe.h.bck
  cp -rfv cygwin_fix_strsafe.h /usr/include/w32api/strsafe.h
  cp -rfv cygwin_fix_strsafe.h /usr/include/w32api/strsafe.h_fix
  echo "* strsafe.sh fixed"
fi

# Install dependencies
apt-cyg update
apt-cyg install wget
apt-cyg install curl
apt-cyg install nasm
apt-cyg install yasm
apt-cyg install zip
apt-cyg install fontconfig
apt-cyg install libass-devel
apt-cyg install libfreetype-devel
apt-cyg install libfontconfig-devel
apt-cyg install libbs2b-devel
apt-cyg install meson
apt-cyg install make
apt-cyg install gcc
apt-cyg install gcc-core
apt-cyg install gcc-g++
apt-cyg install libfribidi-devel
apt-cyg install libgme-devel
apt-cyg install libcaca++-devel
apt-cyg install libcaca-devel
apt-cyg install libtwolame-devel
apt-cyg install libmp3lame-devel
apt-cyg install libwebp-devel
apt-cyg install libsoxr-devel
apt-cyg install libvpx-devel
apt-cyg install libtheora-devel
apt-cyg install libxml2-devel
apt-cyg install libopenjpeg-devel
apt-cyg install libgnutls-devel
apt-cyg install libvorbis-devel
apt-cyg install libogg-devel
apt-cyg install libopus-devel
apt-cyg install openssl-devel
apt-cyg install libopusfile-devel
apt-cyg install libopenjp2-devel
apt-cyg install libtheora-devel
apt-cyg install speex-devel
apt-cyg install speexdsp-devel
apt-cyg install cmake
apt-cyg install libgc-devel
apt-cyg install autoconf
apt-cyg install libtool
apt-cyg install ninja

# Build x264
if [ -f /usr/lib/pkgconfig/x264.pc ] ; then
  echo "* x264 was compiled previously"
  sleep 1
else
  cd ${dir_build_libs}
  rm -rfv ${name_package}
  rm -rfv ${name_folder}
  name_folder=$(echo ${lib_x264_name})
  name_package=$(echo ${lib_x264_name})
  git clone ${lib_x264}
  cd "${name_folder}"
  ./configure --prefix=/usr --enable-static --disable-opencl --disable-cli 
  make
  make install
fi

# Build x265
if [ -f /usr/lib/pkgconfig/x265.pc ] ; then
  echo "* x265 was compiled previously"
  sleep 1
else
  cd ${dir_build_libs}
  rm -rfv ${name_package}
  rm -rfv ${name_folder}
  name_package=$(echo ${lib_x265_name} | cut -d "@" -f 1)
  name_folder=$(echo ${lib_x265_name} | cut -d "@" -f 2)
  wget -c "${lib_x265}"
  tar zxvf ${name_package}
  cd "${name_folder}"
  cd build/linux
  cmake -G "Unix Makefiles" -DCMAKE_INSTALL_PREFIX=/usr -DSTATIC_LINK_CRT:BOOL=ON -DENABLE_CLI:BOOL=OFF ../../source
  sed -i 's/-lgcc_s/-lgcc_eh/g' x265.pc 
  make
  make install
fi

# Build xvid
if [ -f /usr/lib/xvidcore.a ] ; then
  echo "* Xvid was compiled previously"
  sleep 1
else
  cd ${dir_build_libs}
  rm -rfv ${name_package}
  rm -rfv ${name_folder}
  name_package=$(echo ${lib_xvid_name} | cut -d "@" -f 1)
  name_folder=$(echo ${lib_xvid_name} | cut -d "@" -f 2)
  wget -c "${lib_xvid}"
  tar zxvf ${name_package}
  cd "${name_folder}"/build/generic
  ./configure --prefix=/usr
  make
  make install
fi

# Download FFmpeg
echo "* Building FFmpeg using system libraries"
cd ${dir_build_libs}
name_package=$(echo ${ffmpeg_package_name} | cut -d "@" -f 1)
name_folder=$(echo ${ffmpeg_package_name} | cut -d "@" -f 2)
curl "${ffmpeg_package}" > ${name_package}
wget -c ${ffmpeg_package}
tar jxvf ${name_package}
cd ${name_folder}
chmod +x configure
./configure --prefix=${dir_build} --enable-gpl --enable-nonfree --disable-ffplay --disable-w32threads --enable-openssl --enable-libass --enable-libbs2b --enable-libcaca --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libmp3lame --enable-libopenjpeg --enable-libopus --enable-libsoxr --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libxml2 --enable-libxvid --enable-libspeex --enable-libx264 --enable-libx265 --enable-static --enable-version3 --enable-doc --disable-indev=dshow
sleep 20
make
rm -rf ${dir_build}/*
make install

# Remove packages
echo "* Remove temporal files"
cd ..
rm -rfv ${name_package}
rm -rf ${name_folder}

# Copy libraries
mkdir -p ${dir_build}/bin
echo "* Searching dependencies for FFmpeg"
ldd ${dir_build}/bin/ffmpeg.exe | grep "/bin/" | cut -d ">" -f 2 | cut -d "(" -f 1 | tr -s " " > /tmp/deps.txt
file_size=$(cat /tmp/deps.txt | wc -l)
file_scan=1
while [ ${file_scan} -le ${file_size} ] ; do
  library=$(cat /tmp/deps.txt | head -${file_scan} | tail -1)
  cp -rfv ${library} ${dir_build}/bin
  file_scan=$(expr ${file_scan} + 1)
done
echo "* Searching dependencies for FFprobe"
ldd ${dir_build}/bin/ffprobe.exe | grep "/bin/" | cut -d ">" -f 2 | cut -d "(" -f 1 | tr -s " " > /tmp/deps.txt
file_size=$(cat /tmp/deps.txt | wc -l)
file_scan=1
while [ ${file_scan} -le ${file_size} ] ; do
  library=$(cat /tmp/deps.txt | head -${file_scan} | tail -1)
  cp -rfv ${library} ${dir_build}/bin
  file_scan=$(expr ${file_scan} + 1)
done
strip --strip-all ${dir_build}/bin/*
cp -rfv /usr/bin/cyggcc_s-*.dll ${dir_build}/bin/
cp -rfv /usr/bin/cygwin1.dll ${dir_build}/bin/
cp -rfv /usr/bin/cygz.dll ${dir_build}/bin/

# Create CMD scripts for FFmpeg and FFprobe
echo "* Creating CMD scripts for FFmpeg and FFprobe"
echo "@echo off" > ${dir_build}/ffmpeg.cmd
echo "" >> ${dir_build}/ffmpeg.cmd
echo 'set run_binary="%~d0%~p0\bin\ffmpeg.exe"' >> ${dir_build}/ffmpeg.cmd
echo 'set FFmpegArgs=%1 %2 %3 %4 %5 %6 %7 %8 %9' >> ${dir_build}/ffmpeg.cmd
echo 'for /L %%i in (0,1,8) do @shift' >> ${dir_build}/ffmpeg.cmd 
echo 'set FFmpegArgs=%FFmpegArgs% %1 %2 %3 %4 %5 %6 %7 %8 %9' >> ${dir_build}/ffmpeg.cmd
echo 'for /L %%i in (0,1,8) do @shift' >> ${dir_build}/ffmpeg.cmd 
echo 'set FFmpegArgs=%FFmpegArgs% %1 %2 %3 %4 %5 %6 %7 %8 %9' >> ${dir_build}/ffmpeg.cmd
echo 'for /L %%i in (0,1,8) do @shift' >> ${dir_build}/ffmpeg.cmd
echo 'set FFmpegArgs=%FFmpegArgs% %1 %2 %3 %4 %5 %6 %7 %8 %9' >> ${dir_build}/ffmpeg.cmd
echo 'for /L %%i in (0,1,8) do @shift' >> ${dir_build}/ffmpeg.cmd
echo 'set FFmpegArgs=%FFmpegArgs% %1 %2 %3 %4 %5 %6 %7 %8 %9' >> ${dir_build}/ffmpeg.cmd
echo 'for /L %%i in (0,1,8) do @shift' >> ${dir_build}/ffmpeg.cmd
echo 'set FFmpegArgs=%FFmpegArgs% %1 %2 %3 %4 %5 %6 %7 %8 %9' >> ${dir_build}/ffmpeg.cmd
echo 'for /L %%i in (0,1,8) do @shift' >> ${dir_build}/ffmpeg.cmd
echo 'set FFmpegArgs=%FFmpegArgs% %1 %2 %3 %4 %5 %6 %7 %8 %9' >> ${dir_build}/ffmpeg.cmd
echo 'for /L %%i in (0,1,8) do @shift' >> ${dir_build}/ffmpeg.cmd
echo 'set FFmpegArgs=%FFmpegArgs% %1 %2 %3 %4 %5 %6 %7 %8 %9' >> ${dir_build}/ffmpeg.cmd
echo 'for /L %%i in (0,1,8) do @shift' >> ${dir_build}/ffmpeg.cmd
echo 'set FFmpegArgs=%FFmpegArgs% %1 %2 %3 %4 %5 %6 %7 %8 %9' >> ${dir_build}/ffmpeg.cmd
echo 'for /L %%i in (0,1,8) do @shift' >> ${dir_build}/ffmpeg.cmd
echo 'set FFmpegArgs=%FFmpegArgs% %1 %2 %3 %4 %5 %6 %7 %8 %9' >> ${dir_build}/ffmpeg.cmd
echo 'for /L %%i in (0,1,8) do @shift' >> ${dir_build}/ffmpeg.cmd
echo 'set FFmpegArgs=%FFmpegArgs% %1 %2 %3 %4 %5 %6 %7 %8 %9' >> ${dir_build}/ffmpeg.cmd
echo 'for /L %%i in (0,1,8) do @shift' >> ${dir_build}/ffmpeg.cmd
echo 'set FFmpegArgs=%FFmpegArgs% %1 %2 %3 %4 %5 %6 %7 %8 %9' >> ${dir_build}/ffmpeg.cmd
echo 'for /L %%i in (0,1,8) do @shift' >> ${dir_build}/ffmpeg.cmd
echo 'set FFmpegArgs=%FFmpegArgs% %1 %2 %3 %4 %5 %6 %7 %8 %9' >> ${dir_build}/ffmpeg.cmd
echo '%run_binary% %FFmpegArgs%' >> ${dir_build}/ffmpeg.cmd
echo "* Script ffmpeg.cmd created"
echo "@echo off" > ${dir_build}/ffprobe.cmd
echo "" >> ${dir_build}/ffprobe.cmd
echo 'set run_binary="%~d0%~p0\bin\ffprobe.exe"' >> ${dir_build}/ffprobe.cmd
echo 'set FFmpegArgs=%1 %2 %3 %4 %5 %6 %7 %8 %9' >> ${dir_build}/ffprobe.cmd
echo 'for /L %%i in (0,1,8) do @shift' >> ${dir_build}/ffprobe.cmd 
echo 'set FFmpegArgs=%FFmpegArgs% %1 %2 %3 %4 %5 %6 %7 %8 %9' >> ${dir_build}/ffprobe.cmd
echo 'for /L %%i in (0,1,8) do @shift' >> ${dir_build}/ffprobe.cmd 
echo 'set FFmpegArgs=%FFmpegArgs% %1 %2 %3 %4 %5 %6 %7 %8 %9' >> ${dir_build}/ffprobe.cmd
echo 'for /L %%i in (0,1,8) do @shift' >> ${dir_build}/ffprobe.cmd
echo 'set FFmpegArgs=%FFmpegArgs% %1 %2 %3 %4 %5 %6 %7 %8 %9' >> ${dir_build}/ffprobe.cmd
echo 'for /L %%i in (0,1,8) do @shift' >> ${dir_build}/ffprobe.cmd
echo 'set FFmpegArgs=%FFmpegArgs% %1 %2 %3 %4 %5 %6 %7 %8 %9' >> ${dir_build}/ffprobe.cmd
echo 'for /L %%i in (0,1,8) do @shift' >> ${dir_build}/ffprobe.cmd
echo 'set FFmpegArgs=%FFmpegArgs% %1 %2 %3 %4 %5 %6 %7 %8 %9' >> ${dir_build}/ffprobe.cmd
echo 'for /L %%i in (0,1,8) do @shift' >> ${dir_build}/ffprobe.cmd
echo 'set FFmpegArgs=%FFmpegArgs% %1 %2 %3 %4 %5 %6 %7 %8 %9' >> ${dir_build}/ffprobe.cmd
echo 'for /L %%i in (0,1,8) do @shift' >> ${dir_build}/ffprobe.cmd
echo 'set FFmpegArgs=%FFmpegArgs% %1 %2 %3 %4 %5 %6 %7 %8 %9' >> ${dir_build}/ffprobe.cmd
echo 'for /L %%i in (0,1,8) do @shift' >> ${dir_build}/ffprobe.cmd
echo 'set FFmpegArgs=%FFmpegArgs% %1 %2 %3 %4 %5 %6 %7 %8 %9' >> ${dir_build}/ffprobe.cmd
echo 'for /L %%i in (0,1,8) do @shift' >> ${dir_build}/ffprobe.cmd
echo 'set FFmpegArgs=%FFmpegArgs% %1 %2 %3 %4 %5 %6 %7 %8 %9' >> ${dir_build}/ffprobe.cmd
echo 'for /L %%i in (0,1,8) do @shift' >> ${dir_build}/ffprobe.cmd
echo 'set FFmpegArgs=%FFmpegArgs% %1 %2 %3 %4 %5 %6 %7 %8 %9' >> ${dir_build}/ffprobe.cmd
echo 'for /L %%i in (0,1,8) do @shift' >> ${dir_build}/ffprobe.cmd
echo 'set FFmpegArgs=%FFmpegArgs% %1 %2 %3 %4 %5 %6 %7 %8 %9' >> ${dir_build}/ffprobe.cmd
echo 'for /L %%i in (0,1,8) do @shift' >> ${dir_build}/ffprobe.cmd
echo 'set FFmpegArgs=%FFmpegArgs% %1 %2 %3 %4 %5 %6 %7 %8 %9' >> ${dir_build}/ffprobe.cmd
echo '%run_binary% %FFmpegArgs%' >> ${dir_build}/ffprobe.cmd
echo "* Script ffprobe.cmd created"

# Create package
echo "* Creating package"
cd ${dir_build}
rm -rf lib
rm -rf include
zip ${name_folder}-win-32bit-build-cygwin.zip -r *
rm -rf ${dir_build_packages}/${name_folder}-win-32bit-build-cygwin.zip
mv ${name_folder}-win-32bit-build-cygwin.zip ${dir_build_packages}
echo ""
echo "* Your build: ${dir_build_packages}/${name_folder}-win-32bit-build-cygwin.zip"
echo ""
chmod 775 -R ${dir_build_packages}