FROM emscripten/emsdk:5.0.1 AS build

ARG FFMPEG_VERSION=8.0.1
ARG X264_COMMIT=b35605a
ARG LAME_VERSION=3.100

ARG PREFIX=/opt/ffmpeg
ARG MAKEFLAGS="-j4"

RUN wget -qO- https://apt.llvm.org/llvm-snapshot.gpg.key | sudo tee /etc/apt/trusted.gpg.d/apt.llvm.org.asc
RUN echo "deb https://apt.llvm.org/jammy/ llvm-toolchain-jammy-20 main\ndeb-src https://apt.llvm.org/jammy/ llvm-toolchain-jammy-20 main" > /etc/apt/sources.list.d/llvm.list
RUN apt-get update
RUN apt-get install -y libllvm-20-ocaml-dev libllvm20 llvm-20 llvm-20-dev llvm-20-runtime
RUN apt-get install -y libclang-rt-20-dev-wasm32 libclang-rt-20-dev-wasm64 libc++-20-dev-wasm32 libc++abi-20-dev-wasm32 libclang-rt-20-dev-wasm32 libclang-rt-20-dev-wasm64
RUN apt-get update && apt-get install -y autoconf libtool build-essential pkgconf

# libx264
WORKDIR /tmp/

RUN git clone https://code.videolan.org/videolan/x264.git

WORKDIR /tmp/x264

RUN git checkout ${X264_COMMIT} && \
  emconfigure ./configure \
  --prefix=${PREFIX} \
  --host=i686-gnu \
  --enable-static \
  --disable-cli \
  --disable-asm \
  --extra-cflags="-s USE_PTHREADS=1"

RUN emmake make && emmake make install

WORKDIR /tmp/
# libmp3lame
RUN wget -O lame-${LAME_VERSION}.tar.gz https://sourceforge.net/projects/lame/files/lame/${LAME_VERSION}/lame-${LAME_VERSION}.tar.gz/download && \
  tar zxf lame-${LAME_VERSION}.tar.gz && rm lame-${LAME_VERSION}.tar.gz

WORKDIR /tmp/lame-${LAME_VERSION}
RUN  emconfigure ./configure \
  --prefix=${PREFIX} \
  --host=i686-gnu \
  --enable-static \
  --disable-frontend

WORKDIR /tmp/lame-${LAME_VERSION}
RUN emmake make && emmake make install

# Get ffmpeg source.
WORKDIR /tmp/
RUN wget -O ffmpeg-${FFMPEG_VERSION}.tar.gz http://ffmpeg.org/releases/ffmpeg-${FFMPEG_VERSION}.tar.gz && \
  tar zxf ffmpeg-${FFMPEG_VERSION}.tar.gz && rm ffmpeg-${FFMPEG_VERSION}.tar.gz

ARG CFLAGS="-s USE_PTHREADS=1 -O3 -I${PREFIX}/include"
ARG LDFLAGS="$CFLAGS -L${PREFIX}/lib -s INITIAL_MEMORY=33554432"
ENV EM_PKG_CONFIG_PATH="${PREFIX}/lib/pkgconfig"

# Compile ffmpeg.
WORKDIR /tmp/ffmpeg-${FFMPEG_VERSION}
RUN emconfigure ./configure \
  --prefix=${PREFIX} \
  --target-os=none \
  --arch=x86_32 \
  --enable-cross-compile \
  --disable-debug \
  --disable-x86asm \
  --disable-inline-asm \
  --disable-stripping \
  --disable-programs \
  --disable-doc \
  --disable-all \
  --enable-avcodec \
  --enable-avformat \
  --enable-avfilter \
  --enable-avdevice \
  --enable-avutil \
  --enable-swresample \
  --enable-swscale \
  --enable-protocol=file \
  --enable-decoder=h264,aac,pcm_s16le,mp3 \
  --enable-demuxer=mov,matroska,mp3 \
  --enable-muxer=mp4 \
  --enable-gpl \
  --enable-libx264 \
  --enable-libmp3lame \
  --extra-cflags="$CFLAGS" \
  --extra-cxxflags="$CFLAGS" \
  --extra-ldflags="$LDFLAGS" \
  --nm="llvm-nm -g" \
  --ar=emar \
  --as=llvm-as \
  --ranlib=llvm-ranlib \
  --cc=emcc \
  --cxx=em++ \
  --objcc=emcc \
  --dep-cc=emcc

RUN emmake make -j4 && \
  emmake make install


COPY ./src/ffprobe-wasm-wrapper.cpp /build/src/ffprobe-wasm-wrapper.cpp
COPY ./Makefile /build/Makefile

WORKDIR /build

RUN make