import cython
import cython.cimports.libav as lib

lib.avdevice_register_all()

# Exports.
time_base = lib.AV_TIME_BASE


@cython.cfunc
def decode_version(v):
    if v < 0:
        return (-1, -1, -1)

    major: cython.int = (v >> 16) & 0xFF
    minor: cython.int = (v >> 8) & 0xFF
    micro: cython.int = (v) & 0xFF
    return (major, minor, micro)


# Return an informative version string.
# This usually is the actual release version number or a git commit
# description. This string has no fixed format and can change any time. It
# should never be parsed by code.
ffmpeg_version_info = lib.av_version_info()

library_meta = {
    "libavutil": dict(
        version=decode_version(lib.avutil_version()),
        configuration=lib.avutil_configuration(),
        license=lib.avutil_license(),
    ),
    "libavcodec": dict(
        version=decode_version(lib.avcodec_version()),
        configuration=lib.avcodec_configuration(),
        license=lib.avcodec_license(),
    ),
    "libavformat": dict(
        version=decode_version(lib.avformat_version()),
        configuration=lib.avformat_configuration(),
        license=lib.avformat_license(),
    ),
    "libavdevice": dict(
        version=decode_version(lib.avdevice_version()),
        configuration=lib.avdevice_configuration(),
        license=lib.avdevice_license(),
    ),
    "libavfilter": dict(
        version=decode_version(lib.avfilter_version()),
        configuration=lib.avfilter_configuration(),
        license=lib.avfilter_license(),
    ),
    "libswscale": dict(
        version=decode_version(swscale_version()),
        configuration=swscale_configuration(),
        license=swscale_license(),
    ),
    "libswresample": dict(
        version=decode_version(swresample_version()),
        configuration=swresample_configuration(),
        license=swresample_license(),
    ),
}

library_versions = {name: meta["version"] for name, meta in library_meta.items()}