// lib/utils/bit-reader.ts
var BitReader = class {
  constructor(input, endianness) {
    this.input = input;
    this.endianness = endianness;
    // Skip the first 16 bits (2 bytes) of signature
    this.byteOffset = 2;
    this.bitOffset = 0;
  }
  /** Reads a specified number of bits, and move the offset */
  getBits(length = 1) {
    let result = 0;
    let bitsRead = 0;
    while (bitsRead < length) {
      if (this.byteOffset >= this.input.length) {
        throw new Error("Reached end of input");
      }
      const currentByte = this.input[this.byteOffset];
      const bitsLeft = 8 - this.bitOffset;
      const bitsToRead = Math.min(length - bitsRead, bitsLeft);
      if (this.endianness === "little-endian") {
        const mask = (1 << bitsToRead) - 1;
        const bits = currentByte >> this.bitOffset & mask;
        result |= bits << bitsRead;
      } else {
        const mask = (1 << bitsToRead) - 1 << 8 - this.bitOffset - bitsToRead;
        const bits = (currentByte & mask) >> 8 - this.bitOffset - bitsToRead;
        result = result << bitsToRead | bits;
      }
      bitsRead += bitsToRead;
      this.bitOffset += bitsToRead;
      if (this.bitOffset === 8) {
        this.byteOffset++;
        this.bitOffset = 0;
      }
    }
    return result;
  }
};

export { BitReader };
