Function boxIs

src/fl/codec/mp4_parser.cpp.hpp:23–29

4-char box type comparison

// 4-char box type comparison
inline bool boxIs(fl::span<const fl::u8> data, fl::size offset, const char* type) {
    if (offset + 4 > data.size()) return false;
    return data[offset] == fl::u8(type[0]) &&
           data[offset + 1] == fl::u8(type[1]) &&
           data[offset + 2] == fl::u8(type[2]) &&
           data[offset + 3] == fl::u8(type[3]);
}

// Find a top-level box by type within a range. Returns offset of box start, or ~0 if not found.
fl::size findBox(fl::span<const fl::u8> data, fl::size start, fl::size end, const char* type) {