change error pattern files to match the percentage they advertise

#!/usr/bin/env python3

"""

(C) 2022-2025 IVAS codec Public Collaboration with portions copyright Dolby International AB, Ericsson AB,

Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V., Huawei Technologies Co. LTD.,

Koninklijke Philips N.V., Nippon Telegraph and Telephone Corporation, Nokia Technologies Oy, Orange,

Panasonic Holdings Corporation, Qualcomm Technologies, Inc., VoiceAge Corporation, and other

contributors to this repository. All Rights Reserved.

This software is protected by copyright law and by international treaties.

The IVAS codec Public Collaboration consisting of Dolby International AB, Ericsson AB,

Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V., Huawei Technologies Co. LTD.,

Koninklijke Philips N.V., Nippon Telegraph and Telephone Corporation, Nokia Technologies Oy, Orange,

Panasonic Holdings Corporation, Qualcomm Technologies, Inc., VoiceAge Corporation, and other

contributors to this repository retain full ownership rights in their respective contributions in

the software. This notice grants no license of any kind, including but not limited to patent

license, nor is any license granted by implication, estoppel or otherwise.

Contributors are required to enter into the IVAS codec Public Collaboration agreement before making

contributions.

This software is provided "AS IS", without any express or implied warranties. The software is in the

development stage. It is intended exclusively for experts who have experience with such software and

solely for the purpose of inspection. All implied warranties of non-infringement, merchantability

and fitness for a particular purpose are hereby disclaimed and excluded.

Any dispute, controversy or claim arising under or in relation to providing this software shall be

submitted to and settled by the final, binding jurisdiction of the courts of Munich, Germany in

accordance with the laws of the Federal Republic of Germany excluding its conflict of law rules and

the United Nations Convention on Contracts on the International Sales of Goods.

"""

import pathlib

import random

"""

This script was used to generate the error pattern files with exact random percentage matching the filenames.

Before, the files were created by writing out the bfi from the error mechanism inside the codec when we switched

to not using the DEBUGGING build in the automated tests.

Versioned to not loose it.

"""

# using the seed ensures that one can always reproduce the original error patterns (if that should be important at some point).

RANDOM_SEED = "IVAS!!"

BAD_FRAME = b"k "

GOOD_FRAME = b"k!"

ep_dir = pathlib.Path(__file__).parent.joinpath("dly_error_profiles").absolute()

ep_tmpl = "ep_{}pct.g192"

ep_perc = [3, 5, 7, 10, 15]

ep_len = 1000

random.seed(RANDOM_SEED)

for p in ep_perc:

    n_bad = int(1000 * p / 100)

    n_good = ep_len - n_bad

    ep = [BAD_FRAME] * n_bad + [GOOD_FRAME] * n_good

    random.shuffle(ep)

    filename = ep_tmpl.format(p)

    with open(ep_dir.joinpath(filename), "wb") as f:

        f.write(b"".join(ep))

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