name: build

on:
  push:
    branches: [main]
    paths-ignore:
      - '**.md'
      - 'docs/**'
      - 'BENCHMARKS.md'
      - 'ROADMAP.md'
      - 'CHANGELOG.md'
      - 'LICENSE'
      - '.gitea/ISSUE_TEMPLATE/**'
  pull_request:
    branches: [main]

jobs:
  cmake-build:
    name: cmake build (CUDA 12.4, Ubuntu 22.04)
    runs-on: ubuntu-22.04
    container:
      image: nvidia/cuda:12.4.1-cudnn-devel-ubuntu22.04
    steps:
      - name: Install build deps
        run: |
          export DEBIAN_FRONTEND=noninteractive
          apt-get update
          apt-get install -y --no-install-recommends \
              build-essential cmake ninja-build pkg-config git \
              libavformat-dev libavcodec-dev libavutil-dev libswscale-dev \
              ca-certificates

      - name: Checkout
        uses: actions/checkout@v4

      - name: Configure (full — libcuframes + examples + tools)
        run: |
          cmake -B build -S . -G Ninja \
              -DCMAKE_BUILD_TYPE=Release \
              -DBUILD_TESTING=OFF \
              -DBUILD_EXAMPLES=ON \
              -DBUILD_TOOLS=ON \
              -DBUILD_FFMPEG_FILTER=OFF \
              -DBUILD_PYTHON_BINDINGS=OFF

      - name: Build
        run: cmake --build build --parallel

      - name: Verify produced binaries + library
        run: |
          ls -la build/libcuframes/libcuframes.so*
          ls -la build/libcuframes/libcuframes_static.a
          ls -la build/tools/cuframes-rtsp-source/cuframes-rtsp-source
          ls -la build/examples/sub_count/sub_count
          ./build/tools/cuframes-rtsp-source/cuframes-rtsp-source --help | head -5

      - name: Install + verify install layout
        run: |
          cmake --install build --prefix /tmp/cuframes-install
          test -f /tmp/cuframes-install/include/cuframes/cuframes.h
          test -f /tmp/cuframes-install/include/cuframes/cuframes.hpp
          test -f /tmp/cuframes-install/lib/libcuframes.so
          test -f /tmp/cuframes-install/lib/libcuframes_static.a

  filter-build:
    name: ffmpeg filter patch (out-of-tree)
    runs-on: ubuntu-22.04
    container:
      image: nvidia/cuda:12.4.1-cudnn-devel-ubuntu22.04
    needs: cmake-build
    steps:
      - name: Install build deps
        run: |
          export DEBIAN_FRONTEND=noninteractive
          apt-get update
          apt-get install -y --no-install-recommends \
              build-essential cmake ninja-build pkg-config git nasm \
              libssl-dev libx264-dev libx265-dev libnuma-dev zlib1g-dev \
              ca-certificates wget patch

      - name: Checkout
        uses: actions/checkout@v4

      - name: Build libcuframes (для linking в patched ffmpeg)
        run: |
          cmake -B build -S . -G Ninja \
              -DCMAKE_BUILD_TYPE=Release \
              -DBUILD_TESTING=OFF -DBUILD_EXAMPLES=OFF -DBUILD_TOOLS=OFF
          cmake --build build --parallel
          cmake --install build --prefix /opt/cuframes

      - name: Clone FFmpeg n7.1 + apply patch
        run: |
          git clone --depth 1 --branch n7.1 https://github.com/FFmpeg/FFmpeg.git /src/ffmpeg
          cd /src/ffmpeg
          patch -p1 < $GITHUB_WORKSPACE/filter/ffmpeg-7.1-cuframes-demuxer.patch
          ls libavformat/cuframesdec.c

      - name: Configure FFmpeg (minimal + libcuframes)
        run: |
          cd /src/ffmpeg
          ./configure \
              --prefix=/opt/ffmpeg \
              --enable-libcuframes \
              --extra-cflags="-I/opt/cuframes/include -I/usr/local/cuda/include" \
              --extra-ldflags="-L/opt/cuframes/lib -L/usr/local/cuda/lib64" \
              --extra-libs="-lcudart -lpthread -lrt -lm" \
              --disable-x86asm --disable-everything \
              --enable-demuxer=cuframes,rawvideo \
              --enable-decoder=rawvideo \
              --enable-muxer=null,rawvideo \
              --enable-protocol=file --enable-ffmpeg \
              --disable-doc --disable-htmlpages --disable-manpages \
              --disable-podpages --disable-txtpages

      - name: Build FFmpeg
        run: |
          cd /src/ffmpeg
          make -j$(nproc) ffmpeg

      - name: Verify cuframes demuxer registered
        run: |
          export LD_LIBRARY_PATH=/opt/cuframes/lib
          /src/ffmpeg/ffmpeg -hide_banner -formats | grep cuframes
          /src/ffmpeg/ffmpeg -hide_banner -h demuxer=cuframes | head -10