Building ffmpeg & kvazaar with MSVC from msys2

windows.sh

#!/bin/bash

# put script to ~/Release/windows.sh
# run from ~: CI_ARCH=x86_64 ./Release/windows.sh
# Modified from https://gist.github.com/fasterthanlime/b674346115e88b762d76dac02fef6bd3
# to build Kvazaar with VS2022 support

set -e

if [[ -z "${FFRUST_VC_PATH}" ]]; then
    if [[ -n "${FFRUST_RECURSING}" ]]; then
        echo "Something went terribly wrong with our MVSC/msys2 magic"
        exit 1
    fi

    ###############################################################
    # Detect Visual Studio installation, the galaxy brain way
    ###############################################################
    VARSALL_2022_PATH='C:\Program Files\Microsoft Visual Studio\2022\Community\VC\Auxiliary\Build\vcvarsall.bat'
    VARSALL_2017_PATH='C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Auxiliary\Build\vcvarsall.bat'
    VARSALL_2015_PATH='C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\vcvarsall.bat'

    # Look for various places MSVC could hide
    for edition in 2022 2017 2015; do
        echo "Looking for MVSC ${edition}..."
        name="VARSALL_${edition}_PATH"
        file="${!name}"
        if [[ -f "${file}" ]]; then
            echo "✓ Found MSVC ${edition}"
            VARSALL_PATH=${file}
            break
        fi
    done

    # Translate our 'build architecture' to something the MSVC toolchain understands
    case "${CI_ARCH}" in
        x86_64) VARSALL_ARCH="amd64" ;;
        i686)   VARSALL_ARCH="x86" ;;
        *)      echo "Unknown arch: ${CI_ARCH}"; exit 1
    esac    

    ###############################################################
    # Set up PATH so we can call Visual Studio command-line tools
    ###############################################################

    # Make a temporary batch file that calls varsall.bat, and writes path
    # to another temporary file.
    (
cat <<EOF
    call "${VARSALL_PATH}" ${VARSALL_ARCH}
    set FFRUST_VC_PATH=%PATH%
    %BASH_PATH% -lc '%SCRIPT_PATH%'
    exit /b %ERRORLEVEL%
EOF
    ) > .generate_vc_path.bat 

    export BASH_PATH=$(cygpath -w $(which bash.exe))
    export SCRIPT_PATH="${PWD}/Release/windows.sh"
    export FFRUST_RECURSING=1

    # gotta double up '/C' so that automatic mingw path translation
    # does not kick in
    cmd.exe //C .generate_vc_path.bat
    exit 0
fi

###############################################################
# Prerequisites
###############################################################
if [[ -z $CI_ARCH ]]; then
    echo "Missing argument: CI_ARCH"
    exit 1
fi
for cmd in wget patch make; do
    if hash ${cmd} 2>/dev/null; then
        echo "✓ Found ${cmd}"
    else
        echo "Missing command: ${cmd}"
        exit 1
    fi
done

# cygpath translates between windows-style and unix-style paths
# '-p' translates a semi-colon-separated list to a colon-separate list
export PATH=${PATH}:$(cygpath -p -u "${FFRUST_VC_PATH}")
set -x
# Safety check
cl

###############################################################
# Config
###############################################################
FFMPEG_VERSION="5.1.2"

echo "Building for ${CI_ARCH}"

###############################################################
# Set up rest of build environment
###############################################################

# Make sources directory
rm -rf sources/
mkdir -p sources/

# Make prefix
export FFRUST_PREFIX=${PWD}/artifacts/${CI_ARCH}/prefix
mkdir -p ${FFRUST_PREFIX}

pushd sources

###############################################################
# Build Kvazaar
###############################################################

git clone https://github.com/ultravideo/kvazaar.git

pushd kvazaar

KVAZAAR_OPTS="--enable-static --disable-shared"

sed -i 's/-Wall -Wextra -Wvla -Wno-sign-compare -Wno-unused-parameter//g' configure.ac
sed -i 's/ -ftree-vectorize -fvisibility=hidden//g' configure.ac
sed -i 's/KVZ_CFLAGS=\"/KVZ_CFLAGS=\"-D__AVX2__ -DKVZ_STATIC_LIB -I.\/threadwrapper\/include\/ -I ..\/include\//g' configure.ac
sed -i 's/-I\$srcdir\/src/-I ./g' configure.ac

sed -i 's/AX_PTHREAD(/#AX_PTHREAD(/g' configure.ac
sed -i 's/PTHREAD_CFLAGS=-pthread//g' configure.ac
sed -i 's/PTHREAD_LIBS=-lpthread//g' configure.ac
sed -i 's/libkvazaar_la_SOURCES =/libkvazaar_la_SOURCES = \\\n\tthreadwrapper\/src\/pthread.cpp \\\n\tthreadwrapper\/src\/semaphore.cpp/g' src/Makefile.am
sed -i 's/kvazaar_SOURCES =/kvazaar_SOURCES = extras\/getopt.c /g' src/Makefile.am
sed -i 's/CFLAGS=\"\$PTHREAD_CFLAGS \$CFLAGS\"/CPPFLAGS=\"\$CFLAGS\"/g' configure.ac
sed -i 's/CC=\"\$PTHREAD_CC\"//g' configure.ac
sed -i 's/-mavx2/\/arch:AVX2/g' configure.ac

#--prefix=${FFRUST_PREFIX}
./autogen.sh
LD=link.exe CC=cl ./configure --host=x86_64-w64-mingw32 ${KVAZAAR_OPTS}
echo "configure done, running make"
make -j
make install

popd #kvazaar

###############################################################
# Build FFMPEG
###############################################################

wget -O - https://ffmpeg.org/releases/ffmpeg-${FFMPEG_VERSION}.tar.bz2 | tar xjf -
pushd ffmpeg-${FFMPEG_VERSION}/

EXTRA_CFLAGS="-DKVZ_STATIC_LIB -I/usr/include"

FEATURE_FFMPEG_OPTS="--disable-avdevice \
    --disable-doc --disable-ffplay \
    --disable-ffprobe --disable-network --enable-w32threads \
    --enable-gpl --enable-libkvazaar \
    --enable-avformat --enable-avcodec --enable-swscale --enable-swresample \
    --enable-muxer=mp4 --enable-demuxer=mov \
    --enable-decoder=h264 --enable-encoder=libkvazaar \
    --enable-decoder=aac --enable-encoder=aac \
    --enable-protocol=file \
    --disable-shared --enable-static \
    --enable-pic \
    --extra-ldflags=-libpath:$(cygpath -w /usr/lib)"

case "${CI_ARCH}" in
    x86_64) PLATFORM_FFMPEG_OPTS="--target-os=win64 --arch=x86_64" ;;
    i686)   PLATFORM_FFMPEG_OPTS="--target-os=win32 --arch=x86" ;;
    *)      echo "Unknown arch: ${CI_ARCH}"; exit 1
esac    

./configure --toolchain=msvc --disable-x86asm ${PLATFORM_FFMPEG_OPTS} ${FEATURE_FFMPEG_OPTS} "--extra-cflags=${EXTRA_CFLAGS}"
make V=1
make install

popd # ffmpeg

popd # sources