update or Readme.txt and external renderer helper

        .id = CmdLnOptionId_inputFormat,

        .match = "input_format",

        .matchShort = "if",

        .description = "Audio format of input file (e.g. 5_1 or HOA3 or META, use -l for a list)",

        .description = "Audio format of input file (e.g. 5_1 or HOA3 or META,\nuse -l for a list)",

    },

    {

        .id = CmdLnOptionId_inputMetadata,

        .match = "input_metadata",

        .matchShort = "im",

        .description = "Space-separated list of path to metadata files for ISM or MASA inputs or BINAURAL_SPLIT_PCM input mode. For OMASA, ISM files must be specified first.",

        .description = "Space-separated list of path to metadata files for ISM/MASA/OMASA/\nOSBA/BINAURAL_SPLIT_PCM inputs. \nFor OMASA, ISM files must be specified first.",

    },

    {

        .id = CmdLnOptionId_outputFile,

        .id = CmdLnOptionId_sampleRate,

        .match = "sample_rate",

        .matchShort = "fs",

        .description = "Input sampling rate in kHz (16, 32, 48) - required only with raw PCM inputs",

        .description = "Input sampling rate in kHz (16, 32, 48) - required only with raw\nPCM inputs",

    },

    {

        .id = CmdLnOptionId_trajFile,

        .match = "trajectory_file",

        .matchShort = "T",

        .description = "Head rotation trajectory file for simulation of head tracking (only for binaural outputs)",

        .description = "Head rotation trajectory file for simulation of head tracking\n(only for binaural outputs)",

    },

    {

        .id = CmdLnOptionId_outputMetadata,

        .id = CmdLnOptionId_refRotFile,

        .match = "reference_rotation_file",

        .matchShort = "rf",

        .description = "Reference rotation trajectory file for simulation of head tracking (only for binaural outputs)",

        .description = "Reference rotation trajectory file for simulation of head tracking\n(only for binaural outputs)",

    },

    {

        .id = CmdLnOptionId_customHrtfFile,

        .match = "custom_hrtf",

        .matchShort = "hrtf",

        .description = "Custom HRTF file for binaural rendering (only for binaural outputs)",

        .description = "Custom HRTF file for binaural rendering\n(only for binaural outputs)",

    },

    {

        .id = CmdLnOptionId_renderConfigFile,

        .match = "render_config_parameters",

        .matchShort = "render_config",

        .description = "Binaural renderer configuration parameters in file (only for binaural outputs)",

        .description = "Binaural renderer configuration parameters in file\n(only for binaural outputs)",

    },

    {

        .id = CmdLnOptionId_nonDiegeticPan,

        .match = "non_diegetic_panning",

        .matchShort = "non_diegetic_pan",

        .description = "Panning mono non diegetic sound to stereo -90<= pan <= 90\nleft or l or 90->left, right or r or -90->right, center or c or 0 ->middle\n",

        .description = "Panning mono non diegetic sound to stereo -90<= pan <= 90\nleft or l or 90->left, right or r or -90->right,\ncenter or c or 0 ->middle",

    },

    {

        .id = CmdLnOptionId_orientationTracking,

        .match = "tracking_type",

        .matchShort = "otr",

        .description = "Head orientation tracking type: 'none', 'ref', 'avg' or `ref_vec` or `ref_vec_lev` (only for binaural outputs)",

        .description = "Head orientation tracking type: 'none', 'ref', 'avg' or `ref_vec`\nor `ref_vec_lev` (only for binaural outputs)",

    },

    {

        .id = CmdlnOptionId_lfePosition,

        .match = "lfe_position",

        .matchShort = "lp",

        .description = "Output LFE position. Comma-delimited triplet of [gain, azimuth, elevation] where gain is linear (like --gain, -g) and azimuth, elevation are in degrees.\nIf specified, overrides the default behavior which attempts to map input to output LFE channel(s)",

        .description = "Output LFE position. Comma-delimited triplet of [gain, azimuth,\nelevation] where gain is linear (like --gain, -g) and azimuth,\nelevation are in degrees. If specified, overrides the default\nbehavior which attempts to map input to output LFE channel(s)",

    },

    {

        .id = CmdlnOptionId_lfeMatrix,

        .match = "lfe_matrix",

        .matchShort = "lm",

        .description = "LFE panning matrix. File (CSV table) containing a matrix of dimensions [ num_input_lfe x num_output_channels ] with elements specifying linear routing gain (like --gain, -g). \nIf specified, overrides the output LFE position option and the default behavior which attempts to map input to output LFE channel(s)",

        .description = "LFE panning matrix. File (CSV table) containing a matrix of\ndimensions [ num_input_lfe x num_output_channels ] with elements\nspecifying linear routing gain (like --gain, -g). If specified,\noverrides the output LFE position option and the default\nbehavior which attempts to map input to output LFE channel(s)",

    },

    {

        .id = CmdLnOptionId_noDelayCmp,

        .id = CmdLnOptionId_complexityLevel,

        .match = "complexity_level",

        .matchShort = "level",

        .description = "Complexity level, level = (1, 2, 3), will be defined after characterisation.",

        .description = "Complexity level, level = (1, 2, 3), will be defined after\ncharacterisation.",

    },

    {

        .id = CmdLnOptionId_quietModeEnabled,

        .id = CmdLnOptionId_referenceVectorFile,

        .match = "reference_vector_file",

        .matchShort = "rvf",

        .description = "Reference vector trajectory file for simulation of head tracking (only for binaural outputs)",

        .description = "Reference vector trajectory file for simulation of head tracking\n(only for binaural outputs)",

    },

    {

        .id = CmdLnOptionId_exteriorOrientationFile,

        .match = "exterior_orientation_file",

        .matchShort = "exof",

        .description = "External orientation trajectory file for simulation of external orientations",

        .description = "External orientation trajectory file for simulation of external\norientations",

    },

    {

        .id = CmdLnOptionId_framing,

        .id = CmdLnOptionId_syncMdDelay,

        .match = "sync_md_delay",

        .matchShort = "smd",

        .description = "Metadata Synchronization Delay in ms, Default is 0. Quantized by 5ms subframes for TDRenderer (13ms -> 10ms -> 2subframes)",

        .description = "Metadata Synchronization Delay in ms, Default is 0. Quantized by\n5ms subframes for TDRenderer (13ms -> 10ms -> 2subframes)",

    },

    {

        .id = CmdLnOptionId_directivityPatternId,

        .match = "ism_directivity_pattern_id",

        .matchShort = "dpid",

        .description = "Directivity pattern ID(s) = [ID1, ID2, ID3, ID4]. Space-separated list of up to 4 numbers (unsigned integers) can be specified for BINAURAL and BINAURAL_ROOM_REVERB output configuration.\nID1, ID2, ID3, ID4 specify the directivity pattern IDs used for ISMs 1,2,3 and 4 respectively.\nThis options needs to be accompanied by a render_config file, otherwise a default directivity pattern is used.",

        .description = "Directivity pattern ID(s) = [ID1, ID2, ID3, ID4]. Space-separated\nlist of up to 4 numbers (unsigned integers) can be specified for\nBINAURAL and BINAURAL_ROOM_REVERB output.\nID1, ID2, ID3, ID4 specify the directivity pattern IDs used for\nISMs 1,2,3 and 4 respectively. \nThis option needs to be accompanied by a render_config file,\notherwise a default directivity pattern is used.",

    },

    {

        .id = CmdLnOptionId_acousticEnvironmentId,

        .match = "acoustic_environment_id",

        .matchShort = "aeid",

        .description = "Acoustic environment ID (number > 0) alternatively, it can be a text file where each line contains \"ID duration\" for BINAURAL_ROOM_REVERB output configuration.",

        .description = "Acoustic environment ID (number > 0) alternatively, it can be\na text file where each line contains \"ID duration\" for\nBINAURAL_ROOM_REVERB output.",

    },

};

--------

-i File             : Input audio File (WAV, raw PCM or scene description file)

-if Format          : Audio Format of input file (e.g. 5_1 or HOA3 or META, use -l for a list)

-im Files           : Metadata files for ISM (one file per object) or MASA inputs

-im Files           : Metadata files for ISM/MASA/OMASA/OSBA/BINAURAL_SPLIT_PCM (one file per object). 

                      For OMASA input, ISM files must be specified first.

-o File             : Output audio File

-of Format          : Audio Format of output file

                      Alternatively, it can be a custom loudspeaker layout File

-g                  : Input gain (linear, not in dB) to be applied to input audio file

-l                  : List supported audio formats

-smd                : Metadata Synchronization Delay in ms, Default is 0. Quantized by 5ms subframes.

-om File            : Coded metadata File for BINAURAL_SPLIT_PCM output format

-om File            : Coded metadata File (only for BINAURAL_SPLIT_PCM output)

-prbfi File         : BFI File (only for BINAURAL_SPLIT_PCM output)

-level level        : Complexity level, level = (1, 2, 3), will be defined after characterisation.

                      Currently, all values default to level 3 (full functionality).

-q                  : Quiet mode, limit printouts to terminal, default is deactivated