set default head pose in case -T head_rot_file is not provided

        /* Convert from int to float and from interleaved to packed */

        convertInputBuffer( inpInt16Buffer, numSamplesRead, inBuffer.config.numSamplesPerChannel, num_in_channels, inFloatBuffer );

        int16_t num_subframes, sf_idx;

        int16_t num_subframes;

        num_subframes = (int16_t) args.render_framesize;

        /* Read from head rotation trajectory file if specified */

        IVAS_QUATERNION headRot[IVAS_MAX_PARAM_SPATIAL_SUBFRAMES];

        IVAS_VECTOR3 Pos[IVAS_MAX_PARAM_SPATIAL_SUBFRAMES];

        if ( headRotReader != NULL )

        {

            for ( sf_idx = 0; sf_idx < num_subframes; sf_idx++ )

            for ( i = 0; i < num_subframes; i++ )

            {

                IVAS_QUATERNION headRot;

                IVAS_VECTOR3 Pos;

                if ( ( error = HeadRotationFileReading( headRotReader, &headRot, &Pos ) ) != IVAS_ERR_OK )

                if ( ( error = HeadRotationFileReading( headRotReader, &headRot[i], &Pos[i] ) ) != IVAS_ERR_OK )

                {

                    fprintf( stderr, "\nError in Head Rotation File Reading: %s\n", ivas_error_to_string( error ) );

                    goto cleanup;

                }

                if ( ( error = ISAR_POST_REND_SetHeadRotation( hIsarPostRend, headRot, Pos, DEFAULT_AXIS, sf_idx ) ) != IVAS_ERR_OK )

                {

                    fprintf( stderr, "\nError setting Head Rotation: %s\n", ivas_error_to_string( error ) );

                    goto cleanup;

                }

            }

        }

        else

        {

            fprintf( stderr, "\nHead Rotation should be enabled in post renderer\n" );

            for ( i = 0; i < num_subframes; i++ )

            {

                headRot[i].w = -3.0f;

                headRot[i].x = 0.0f;

                headRot[i].y = 0.0f;

                headRot[i].z = 0.0f;

                Pos[i].x = 0.0f;

                Pos[i].y = 0.0f;

                Pos[i].z = 0.0f;

            }

        }

        for ( i = 0; i < num_subframes; i++ )

        {

            if ( ( error = ISAR_POST_REND_SetHeadRotation( hIsarPostRend, headRot[i], Pos[i], DEFAULT_AXIS, i ) ) != IVAS_ERR_OK )

            {

                fprintf( stderr, "\nError setting Head Rotation: %s\n", ivas_error_to_string( error ) );

                goto cleanup;

            }

        }

        /* Read from split renderer bfi file if specified */

        if ( splitRendBFIReader != NULL && splitBinNeedsNewFrame )