# Cross-compilation image for x86_64 based on Debian 11
# Build on Debian 11 (GLIBC 2.31) for maximum runtime compatibility

FROM debian:11

# Linux headers used by v4l2r bindgen
ARG LINUX_HEADERS_VERSION=6.6
ARG LINUX_HEADERS_SHA256=

# Set Rustup mirrors (Aliyun)
#ENV RUSTUP_UPDATE_ROOT=https://mirrors.aliyun.com/rustup/rustup \
#    RUSTUP_DIST_SERVER=https://mirrors.aliyun.com/rustup

# Install Rust toolchain
RUN apt-get update && apt-get install -y --no-install-recommends \
    curl \
    ca-certificates \
    && curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y --default-toolchain stable \
    && rm -rf /var/lib/apt/lists/*

ENV PATH="/root/.cargo/bin:${PATH}"

# Install build dependencies
# Note: libyuv, libvpx, libx264, libx265, libopus are built from source below for static linking
RUN apt-get update && apt-get install -y --no-install-recommends \
    # Build tools
    build-essential \
    pkg-config \
    cmake \
    nasm \
    yasm \
    git \
    libclang-dev \
    llvm \
    wget \
    xz-utils \
    rsync \
    # Autotools for libopus (requires autoreconf)
    autoconf \
    automake \
    libtool \
    # Core system libraries
    libasound2-dev \
    libv4l-dev \
    libudev-dev \
    linux-libc-dev \
    zlib1g-dev \
    # Note: libjpeg-turbo, libx264, libx265, libopus are built from source below for static linking
    libva-dev \
    libdrm-dev \
    libmfx-dev \
    # X11 libraries (for VAAPI)
    libx11-dev \
    libxcb1-dev \
    libxau-dev \
    libxdmcp-dev \
    && rm -rf /var/lib/apt/lists/*

# Install newer V4L2 headers for v4l2r bindgen
RUN mkdir -p /opt/v4l2-headers \
    && wget -q https://cdn.kernel.org/pub/linux/kernel/v6.x/linux-${LINUX_HEADERS_VERSION}.tar.xz -O /tmp/linux-headers.tar.xz \
    && if [ -n "$LINUX_HEADERS_SHA256" ]; then echo "$LINUX_HEADERS_SHA256  /tmp/linux-headers.tar.xz" | sha256sum -c -; fi \
    && tar -xf /tmp/linux-headers.tar.xz -C /tmp \
    && cd /tmp/linux-${LINUX_HEADERS_VERSION} \
    && make ARCH=x86 headers_install INSTALL_HDR_PATH=/opt/v4l2-headers \
    && rm -rf /tmp/linux-${LINUX_HEADERS_VERSION} /tmp/linux-headers.tar.xz

ENV V4L2R_VIDEODEV2_H_PATH=/opt/v4l2-headers/include

# Build static libjpeg-turbo from source (needed by libyuv)
RUN git clone --depth 1 https://github.com/libjpeg-turbo/libjpeg-turbo /tmp/libjpeg-turbo \
    && cd /tmp/libjpeg-turbo \
    && mkdir build && cd build \
    && cmake .. -DCMAKE_BUILD_TYPE=Release -DCMAKE_POSITION_INDEPENDENT_CODE=ON \
        -DENABLE_SHARED=OFF -DENABLE_STATIC=ON \
    && make -j$(nproc) \
    && make install \
    && rm -rf /tmp/libjpeg-turbo

# Build static libyuv from source (uses libjpeg-turbo headers)
RUN git clone --depth 1 https://github.com/lemenkov/libyuv /tmp/libyuv \
    && cd /tmp/libyuv \
    && mkdir build && cd build \
    && cmake .. -DCMAKE_BUILD_TYPE=Release -DCMAKE_POSITION_INDEPENDENT_CODE=ON \
    && make -j$(nproc) \
    && make install \
    && rm -rf /tmp/libyuv

# Build static libvpx from source
RUN git clone --depth 1 https://github.com/webmproject/libvpx /tmp/libvpx \
    && cd /tmp/libvpx \
    && ./configure \
        --enable-static --disable-shared --enable-pic \
        --disable-examples --disable-tools --disable-docs \
    && make -j$(nproc) \
    && make install \
    && rm -rf /tmp/libvpx

# Build static libx264 from source
RUN git clone --depth 1 https://code.videolan.org/videolan/x264.git /tmp/x264 \
    && cd /tmp/x264 \
    && ./configure --enable-static --disable-cli \
    && make -j$(nproc) \
    && make install \
    && rm -rf /tmp/x264

# Build static libx265 from source
RUN git clone --depth 1 https://bitbucket.org/multicoreware/x265_git /tmp/x265 \
    && cd /tmp/x265 \
    && cd source \
    && mkdir -p build \
    && cd build \
    && cmake .. -DCMAKE_BUILD_TYPE=Release \
        -DENABLE_SHARED=OFF \
        -DENABLE_CLI=OFF \
        -DBUILD_SHARED_LIBS=OFF \
    && make -j$(nproc) \
    && make install \
    && rm -rf /tmp/x265

# Create pkg-config file for x265 (required by FFmpeg)
# Fix: Added -lstdc++ -lm -ldl -lpthread to Libs for static linking compatibility
RUN mkdir -p /usr/local/lib/pkgconfig && \
    cat > /usr/local/lib/pkgconfig/x265.pc <<EOF
prefix=/usr/local
exec_prefix=\${prefix}
libdir=\${exec_prefix}/lib
includedir=\${prefix}/include

Name: x265
Description: H.265/HEVC video encoder
Version: 199
Libs: -L\${libdir} -lx265 -lstdc++ -lm -ldl -lpthread
Cflags: -I\${includedir}
EOF

# Build static libopus from source
RUN git clone --depth 1 https://github.com/xiph/opus /tmp/opus \
    && cd /tmp/opus \
    && ./autogen.sh \
    && ./configure \
        --enable-static --disable-shared \
        --disable-doc \
    && make -j$(nproc) \
    && make install \
    && rm -rf /tmp/opus

# Download and build FFmpeg with minimal configuration for encoding only
RUN mkdir -p /tmp/ffmpeg-build && cd /tmp/ffmpeg-build \
    && wget -q https://files.mofeng.run/src/image/other/ffmpeg.tar.gz \
    && tar -xzf ffmpeg.tar.gz \
    && cd ffmpeg/ffmpeg-rockchip \
    && ./configure \
        --enable-gpl \
        --enable-version3 \
        --disable-shared \
        --enable-static \
        --enable-pic \
        # Hardware acceleration
        --enable-libdrm \
        --enable-vaapi \
        --enable-libmfx \
        # Software encoding libraries
        --enable-libx264 \
        --enable-libx265 \
        --enable-libvpx \
        # Disable programs and docs
        --disable-programs \
        --disable-doc \
        --disable-htmlpages \
        --disable-manpages \
        --disable-podpages \
        --disable-txtpages \
        # Disable network
        --disable-network \
        --disable-protocols \
        # Disable unused libraries
        --disable-avformat \
        --disable-swscale \
        --disable-swresample \
        --disable-avfilter \
        --disable-avdevice \
        --disable-postproc \
        # Disable all decoders
        --disable-decoders \
        # Disable all encoders, enable only needed ones
        --disable-encoders \
        --enable-encoder=h264_vaapi \
        --enable-encoder=hevc_vaapi \
        --enable-encoder=vp8_vaapi \
        --enable-encoder=vp9_vaapi \
        --enable-encoder=h264_qsv \
        --enable-encoder=hevc_qsv \
        --enable-encoder=libx264 \
        --enable-encoder=libx265 \
        --enable-encoder=libvpx_vp8 \
        --enable-encoder=libvpx_vp9 \
        # Disable muxers/demuxers
        --disable-muxers \
        --disable-demuxers \
        # Disable parsers except needed ones
        --disable-parsers \
        --enable-parser=h264 \
        --enable-parser=hevc \
        --enable-parser=vp8 \
        --enable-parser=vp9 \
        # Disable BSFs except needed ones
        --disable-bsfs \
        --enable-bsf=h264_mp4toannexb \
        --enable-bsf=hevc_mp4toannexb \
        # Disable hardware decoding
        --disable-hwaccels \
        # Disable other unused features
        --disable-indevs \
        --disable-outdevs \
        --disable-filters \
        --disable-debug \
    && make -j$(nproc) \
    && make install \
    && cd / \
    && rm -rf /tmp/ffmpeg-build

# Add Rust target
RUN rustup target add x86_64-unknown-linux-gnu

# Configure environment for static linking
ENV PKG_CONFIG_ALLOW_CROSS=1\
    FFMPEG_STATIC=1 \
    LIBYUV_STATIC=1