bs1770gain.nix

with import <nixpkgs> {};

let
  libpbutil = stdenv.mkDerivation {
    name = "libpbutil";
    src = requireFile {
      name = "libpbutil.tar.gz";
      url = "http://somewhere";
      sha256 = "0nc4d6y65h1svd3cylsy8kbc5wwl57whd93pdsi24cxdi2mfrinx";
    };
  };

in stdenv.mkDerivation rec {
  name = "bs1770gain-${version}";
  version = "0.4.1";

  src = fetchurl {
    url = "mirror://sourceforge/bs1770gain/${name}-src.tar.gz";
    sha256 = "1iybnn680ac7zyikwnk23bv5j40fy4mb57qdzgji21mxw8vlvxmf";
  };

  NIX_LDFLAGS = "-lpbutil -lm -ldl";

  postPatch = ''
    sed -i -e 's/dlopen(path,RTLD_LAZY)/dlopen(s3,RTLD_LAZY)/' \
      libffsox-2/ffsox_dynload.c

    rm -f libffsox-2/{wasapi,player}.c

    cat > CMakeLists.txt <<CMAKE
    cmake_minimum_required(VERSION 2.8.11)
    project(bs1770gain)

    include(GNUInstallDirs)
    find_package(PkgConfig REQUIRED)
    pkg_check_modules(avutil libavutil REQUIRED)
    pkg_check_modules(sox sox REQUIRED)

    include_directories(bs1770gain lib1770-2 libffsox-2)

    add_subdirectory(bs1770gain)
    add_subdirectory(lib1770-2)
    add_subdirectory(libffsox-2)
    CMAKE

    cat > bs1770gain/CMakeLists.txt <<CMAKE
    aux_source_directory(. sources)
    file(GLOB headers *.h)
    add_executable(bs1770gain \''${sources} \''${headers})
    target_link_libraries(bs1770gain lib1770 libffsox avutil)
    install(TARGETS bs1770gain DESTINATION \''${CMAKE_INSTALL_BINDIR})
    CMAKE

    cat > lib1770-2/CMakeLists.txt <<CMAKE
    aux_source_directory(. sources)
    file(GLOB headers *.h)
    add_library(lib1770 \''${sources} \''${headers})
    CMAKE
    cat > libffsox-2/CMakeLists.txt <<CMAKE
    aux_source_directory(. sources)
    file(GLOB headers *.h)
    add_library(libffsox \''${sources} \''${headers})
    target_link_libraries(libffsox lib1770 sox)
    CMAKE
  '';

  buildInputs = [ cmake pkgconfig sox ffmpeg libpbutil ];
}