Check of masa subformat switch, add test for format switching

            /* read number of MASA transport channels */

            if ( st_ivas->bit_stream[( ivas_total_brate / FRAMES_PER_SEC ) - 1] )

            {

#ifdef DECODER_FORMAT_SWITCHING

                if ( st_ivas->nchan_transport == 1 )

                {

                    st_ivas->restartNeeded = 1;

                    return IVAS_ERR_OK;

                }

#endif

                st_ivas->nchan_transport = 2;

                element_mode_flag = 1;

            }

            else

            {

#ifdef DECODER_FORMAT_SWITCHING

                if ( st_ivas->nchan_transport == 2 )

                {

                    st_ivas->restartNeeded = 1;

                    return IVAS_ERR_OK;

                }

#endif

                st_ivas->nchan_transport = 1;

            }

#!/usr/bin/env python3

__copyright__ = """

(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.

"""

__doc__ = """

To configure test modules.

"""

import pytest

import csv

import os

import sys

import random

from tempfile import TemporaryDirectory

from pathlib import Path

import soundfile as sf

import numpy as np

ROOT_DIR = os.path.abspath(os.path.join(os.path.dirname(__file__), "../.."))

sys.path.append(ROOT_DIR)

from tests.conftest import EncoderFrontend, DecoderFrontend

from tests.create_short_testvectors import create_short_testvectors

from tests.renderer.constants import (

    FORMAT_TO_FILE_COMPARETEST,

    FORMAT_TO_METADATA_FILES,

)

FORMAT_ARGUMENT_MAPPING = {

    "MONO": [],

    "STEREO": ["-stereo"],

    "5_1": ["-mc", "5_1"],

    "7_1": ["-mc", "7_1"],

    "5_1_2": ["-mc", "5_1_2"],

    "5_1_4": ["-mc", "5_1_4"],

    "7_1_4": ["-mc", "7_1_4"],

    "FOA": ["-sba", "+1"],

    "HOA2": ["-sba", "+2"],

    "HOA3": ["-sba", "+3"],

    "ISM1": ["-ism", "1"],

    "ISM2": ["-ism", "2"],

    "ISM3": ["-ism", "3"],

    "ISM4": ["-ism", "4"],

    "MASA1": ["-masa", "1"],

    "MASA2": ["-masa", "2"],

    "ISM1MASA1": ["-ism_masa", "1", "1"],

    "ISM2MASA1": ["-ism_masa", "2", "1"],

    "ISM3MASA1": ["-ism_masa", "3", "1"],

    "ISM4MASA1": ["-ism_masa", "4", "1"],

    "ISM1MASA2": ["-ism_masa", "1", "2"],

    "ISM2MASA2": ["-ism_masa", "2", "2"],

    "ISM3MASA2": ["-ism_masa", "3", "2"],

    "ISM4MASA2": ["-ism_masa", "4", "2"],

    "ISM1SBA1": ["-ism_sba", "1", "+1"],

    "ISM1SBA2": ["-ism_sba", "1", "+2"],

    "ISM1SBA3": ["-ism_sba", "1", "+3"],

    "ISM2SBA1": ["-ism_sba", "2", "+1"],

    "ISM2SBA2": ["-ism_sba", "2", "+2"],

    "ISM2SBA3": ["-ism_sba", "2", "+3"],

    "ISM3SBA1": ["-ism_sba", "3", "+1"],

    "ISM3SBA2": ["-ism_sba", "3", "+2"],

    "ISM3SBA3": ["-ism_sba", "3", "+3"],

    "ISM4SBA1": ["-ism_sba", "4", "+1"],

    "ISM4SBA2": ["-ism_sba", "4", "+2"],

    "ISM4SBA3": ["-ism_sba", "4", "+3"],

}

def test_format_switching (

    dut_encoder_frontend: EncoderFrontend,

    dut_decoder_frontend: DecoderFrontend

):

    bitrate = 48000

    bandwidth = "FB"

    outMode = "MONO"

    # Create 1s test files

    cut_suffix = "_cut.wav"

    test_file = Path( str(FORMAT_TO_FILE_COMPARETEST["MONO"]).replace(".wav", cut_suffix) )

    if not test_file.exists():

        create_short_testvectors(1.0, False, None)

    with TemporaryDirectory() as tmp_dir:

        bitstreams = []

        # Encode subformats

        for key, audioFile in FORMAT_TO_FILE_COMPARETEST.items():

            if key in ["META", "16ch_8+4+4", "4d4", "t_design_4"]:

                break

            encoder_args = []

            cutFile = Path( str(audioFile).replace(".wav", cut_suffix) )

            encoder_args += FORMAT_ARGUMENT_MAPPING[key]

            if key in FORMAT_TO_METADATA_FILES:

                encoder_args += FORMAT_TO_METADATA_FILES[key]

            elif "SBA" in key:

                # ISM metadata files for OSBA

                encoder_args += FORMAT_TO_METADATA_FILES[key[:4]]

            temp_bitstream = Path(tmp_dir).joinpath(f"output-{bitrate}-{bandwidth}-{key}.bts").absolute()

            dut_encoder_frontend.run(

                bitrate=bitrate,

                input_sampling_rate=48,

                input_path=cutFile,

                output_bitstream_path=temp_bitstream,

                sba_order=None,

                dtx_mode=False,

                max_band=bandwidth,

                add_option_list=encoder_args

            )

            bitstreams.append(temp_bitstream)

        # Combine bitstreams

        cat_bitstream_full = Path(tmp_dir).joinpath(f"output-{bitrate}-{bandwidth}-FULL-CAT.bts").absolute()

        cat_bitstream_no_evs = Path(tmp_dir).joinpath(f"output-{bitrate}-{bandwidth}-NO-EVS-CAT.bts").absolute()

        catBsFull = bytes()

        catBsNoEVS = bytes()

        for bsFile in bitstreams:

            with open (bsFile, mode="rb") as fd:

                tempRead = fd.read()

                catBsFull += tempRead

                if "MONO" not in str(bsFile):

                    catBsNoEVS += tempRead

        with open (cat_bitstream_full, mode="wb") as outFile:

            outFile.write(catBsFull)

        with open (cat_bitstream_no_evs, mode="wb") as outFile:

            outFile.write(catBsNoEVS)

        # Decode the combined bitstreams

        cat_output_full = Path(tmp_dir).joinpath(f"output-{bitrate}-{bandwidth}-FULL-CAT.wav").absolute()

        cat_output_no_evs = Path(tmp_dir).joinpath(f"output-{bitrate}-{bandwidth}-NO-EVS-CAT.wav").absolute()

        dut_decoder_frontend.run(

            output_config=outMode,

            output_sampling_rate=48,

            input_bitstream_path=cat_bitstream_no_evs,

            output_path=cat_output_no_evs,

            add_option_list= []

        )

        dut_decoder_frontend.run(

                output_config=outMode,

                output_sampling_rate=48,

                input_bitstream_path=cat_bitstream_full,

                output_path=cat_output_full,

                add_option_list= []

            )