MagicPodcast/find_loudness.py

def createReadStream(file):
    """Create Bytes Stream"""
    data = open(file, 'rb')
    return data


def process_find_loudness(file_path: str, threshold_at_point: int, inertia_samples: float, label: str):

    print("Start process to find loudness in:")
    print(
        F"\tfile_path: {file_path}\n"
        F"\tthreshold_at_point: {threshold_at_point}\n"
        F"\tinertia_samples: {inertia_samples}\n"
        F"\tlabel: {label}\n"
    )
    stream = createReadStream(file_path)
    position = 0
    results = []
    last_swap_position = 0
    keep_loud_until = 0
    was_loud_last_time = False
    print("Read chunks")
    chunks = stream.read()
    print(F"Length: {len(chunks)}")

    try:
        for i, byte in enumerate(chunks):
            position += 1
            volume = abs(byte - 128)

            if position >= keep_loud_until:
                is_loud = volume > threshold_at_point

                if is_loud != was_loud_last_time:
                    swap_point = {
                        'position_start':  last_swap_position,
                        'duration': position - last_swap_position,
                        'loud': was_loud_last_time,
                        'label': label
                    }
                    results.append(swap_point)
                    last_swap_position = position
                    was_loud_last_time = is_loud

            if volume > threshold_at_point:
                keep_loud_until = position + inertia_samples

        return results

    except Exception as err:
        print(err)