import struct

from select import select


def int16_to_float(high, low):
    # 将两个 16 位整数合并为一个 32 位整数
    combined = (high << 16) | (low & 0xFFFF)
    # 将 32 位整数解释为浮点数
    float_value = struct.unpack('>f', struct.pack('>I', combined))[0]
    return float_value


def float_to_int16(value):
    # 将浮点数打包为 32 位整数字节
    packed = struct.pack('>f', value)
    # 解包成 32 位整数
    combined = struct.unpack('>I', packed)[0]
    # 分离出高 16 位和低 16 位
    high = (combined >> 16) & 0xFFFF
    low = combined & 0xFFFF
    return high, low


def int16_to_float_n(vals):
    # 给出的vals是一个数的列表，其长度必须是2的整数倍
    _val_num = int(len(vals) / 2)
    _float_vals = []
    for i in range(_val_num):
        _float_vals.append(int16_to_float(vals[i * 2], vals[i * 2 + 1]))

    return _float_vals


def float_to_int16_n(vals):
    """
    将多个float类型数转换为一个int16类型数的list
    :param vals: float类型数的list
    :return: int16类型数的list
    """
    _val_num = len(vals)
    _int_vals = []
    for i in range(_val_num):
        _int_vals = _int_vals + [*float_to_int16(vals[i])]
    return _int_vals


if __name__ == '__main__':
    # 示例
    high = 0x3f80  # 16 位高位
    low = 0x0000   # 16 位低位
    result = int16_to_float(high, low)
    print(result)
    high, low = float_to_int16(result)
    print(high, low)
    float_val_1 = 0.1
    print(float_to_int16(float_val_1))

    float_vals = [0.1, 0.2]
    print(float_to_int16_n(float_vals))