use the same output format as rfid raw_analyze

flipper_rfid_raw.py

import sys
import struct
import io

def varint(f):
    shift = 0
    result = 0
    while True:
        i = f.read(1)[0]
        result |= (i & 0x7f) << shift
        shift += 7
        if not (i & 0x80):
            break

    return result


def r32(f):
    return struct.unpack('I', f.read(4))[0]

def rf(f):
    return struct.unpack('f', f.read(4))[0]


with open(sys.argv[1], 'rb') as f:
    assert(f.read(4) == b'RIFL') #magic
    assert(r32(f) == 1) #version

    frequency = rf(f)
    duty_cycle = rf(f)
    max_buffer_size = r32(f)
    #print("frequencey", frequency)
    #print("duty_cycle", duty_cycle)
    #print("max_buffer_size", max_buffer_size)
    smp = 0
    while True:
        a = f.read(4)
        if len(a) != 4:
            break
        bufferlength = struct.unpack('I', a)[0]
        buffer = f.read(bufferlength)

        bio = io.BytesIO(buffer)
        while bio.tell() < len(buffer):
            pulse = varint(bio)
            duration = varint(bio)
            
            print("[%d %d]\t[%d %d]" % (pulse, duration, pulse, duration-pulse))
            #print("0"*pulse + "1"*(duration-pulse), end='')
            #i