/*
 * Copyright (c) 1983-2023 Trevor Wishart and Composers Desktop Project Ltd
 * http://www.trevorwishart.co.uk
 * http://www.composersdesktop.com
 *
 This file is part of the CDP System.

 The CDP System is free software; you can redistribute it
 and/or modify it under the terms of the GNU Lesser General Public
 License as published by the Free Software Foundation; either
 version 2.1 of the License, or (at your option) any later version.

 The CDP System is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU Lesser General Public License for more details.

 You should have received a copy of the GNU Lesser General Public
 License along with the CDP System; if not, write to the Free Software
 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
 02111-1307 USA
 *
 */



#include <stdio.h>
#include <stdlib.h>
#include <structures.h>
#include <tkglobals.h>
#include <pnames.h>
#include <filetype.h>
#include <processno.h>
#include <modeno.h>
#include <logic.h>
#include <globcon.h>
#include <cdpmain.h>
#include <math.h>
#include <mixxcon.h>
#include <osbind.h>
#include <standalone.h>
#include <ctype.h>
#include <sfsys.h>
#include <string.h>
#include <srates.h>

#if defined unix || defined __GNUC__
#define round(x) lround((x))
#endif
#ifndef HUGE
#define HUGE 3.40282347e+38F
#endif

char errstr[2400];

int anal_infiles = 1;
int     sloom = 0;
int sloombatch = 0;

const char* cdp_version = "7.1.0";

//CDP LIB REPLACEMENTS
static int setup_frame_arrays(dataptr dz);
static int setup_frame_application(dataptr dz);
static int parse_sloom_data(int argc,char *argv[],char ***cmdline,int *cmdlinecnt,dataptr dz);
static int parse_infile_and_check_type(char **cmdline,dataptr dz);
static int setup_frame_param_ranges_and_defaults(dataptr dz);
static int handle_the_outfile(int *cmdlinecnt,char ***cmdline,dataptr dz);
static int setup_and_init_input_param_activity(dataptr dz,int tipc);
static int setup_input_param_defaultval_stores(int tipc,aplptr ap);
static int establish_application(dataptr dz);
static int initialise_vflags(dataptr dz);
static int setup_parameter_storage_and_constants(int storage_cnt,dataptr dz);
static int initialise_is_int_and_no_brk_constants(int storage_cnt,dataptr dz);
static int mark_parameter_types(dataptr dz,aplptr ap);
static int assign_file_data_storage(int infilecnt,dataptr dz);
static int get_tk_cmdline_word(int *cmdlinecnt,char ***cmdline,char *q);
static int get_the_process_no(char *prog_identifier_from_cmdline,dataptr dz);
static int get_the_mode_from_cmdline(char *str,dataptr dz);
static int setup_and_init_input_brktable_constants(dataptr dz,int brkcnt);
static int check_the_param_validity_and_consistency(dataptr dz);
static int rotate(dataptr dz);
static int read_the_special_data(char *filename,dataptr dz);
static int snake_test(int n,double lasttime,int linecnt,char *filename,dataptr dz);
static void get_next_snake(dataptr dz);
static int get_first_rotation_orientation(int n,dataptr dz);
static void set_stereo_levels(double pos, double *llevel, double *rlevel);
static void do_smear(int loutchan,int routchan,double lsig,double rsig,int bufpos,int chans,float *obuf,double smear);
static int reorient_test(dataptr dz);
static int editchans_test(dataptr dz) ;
static int reorient(dataptr dz);
static int mirror(dataptr dz);
static int bilateral(dataptr dz);
static int beast_bilateral(dataptr dz);
static int swapchans(dataptr dz);
static int envchans(dataptr dz);

#define FRAME_OCHAN_LEFT        0       /* the output left channel for output of moving sig, for each input channel, assuming sound is rotating round ring */
#define FRAME_OCHAN_RIGHT       1       /* the output right channel for output of moving sig, for each input channel, assuming sound is rotating round ring */
#define FRAME_OL                        2       /* the output left channel for output of moving sig, for each input channel, once snaking has been factored in */
#define FRAME_OR                        3       /* the output right channel for output of moving sig, for each input channel, once snaking has been factored in */
#define FRAME_SNAKE                     4       /* store of ALL snaking values, over all times */
#define FRAME_SNAKEPERM         5       /* current snake values */
#define FRAME_ORIENT            6       /* orientation of first non-zero rotation : with 2 rotations, can be two values */

#define FRAME_POS                       0       /* inter-lspkr position at current time */
#define FRAME_STEP                      1       /* movement step between loudspeaker pair, same for every input channel : with 2 rotations, can be 2 step values */
#define FRAME_LLEVEL            2       /* Relative level on left lspkr of a pair */
#define FRAME_RLEVEL            3       /* Relative level on rigth lspkr of a pair */

#define MAX_ROT                         500     /* Max rate of frame-rotation: slow enough to ensure that spatial step between samples is NOT >= 1 */
/* as alogirithm depends on intrer-speaker position (range 0-1) being reset within the 0-1 range simply by adding or subtracting 1 */
/* whenever it oversteps those bounds, so can't step from any position WITHIN range, by >= 1 */
#define ROTATION0       0
#define ROTATION1       1

#define EVEN(x) (!ODD(x))
#define ROOT2   (1.4142136)

#define next_snake_loc  ringsize
#define next_snake_time total_windows

int SMEAR;

/**************************************** MAIN *********************************************/

int main(int argc,char *argv[])
{
    int exit_status;
    dataptr dz = NULL;
    char **cmdline;
    int  cmdlinecnt;
    int n;
    //aplptr ap;
    int is_launched = FALSE;

    if(argc==2 && (strcmp(argv[1],"--version") == 0)) {
        fprintf(stdout,"%s\n",cdp_version);
        fflush(stdout);
        return 0;
    }
    /* CHECK FOR SOUNDLOOM */
    if((sloom = sound_loom_in_use(&argc,&argv)) > 1) {
        sloom = 0;
        sloombatch = 1;
    }
    if(sflinit("cdp")){
        sfperror("cdp: initialisation\n");
        return(FAILED);
    }
    /* SET UP THE PRINCIPLE DATASTRUCTURE */
    if((exit_status = establish_datastructure(&dz))<0) {                                    // CDP LIB
        print_messages_and_close_sndfiles(exit_status,is_launched,dz);
        return(FAILED);
    }
    if(!sloom) {
        if(argc == 1) {
            usage1();
            return(FAILED);
        } else if(argc == 2) {
            usage2(argv[1]);
            return(FAILED);
        }
    }
    dz->maxmode = 8;
    if(!sloom) {
        if((exit_status = make_initial_cmdline_check(&argc,&argv))<0) {         // CDP LIB
            print_messages_and_close_sndfiles(exit_status,is_launched,dz);
            return(FAILED);
        }
        cmdline    = argv;
        cmdlinecnt = argc;
        if((get_the_process_no(argv[0],dz))<0)
            return(FAILED);
        cmdline++;
        cmdlinecnt--;
        if((exit_status = get_the_mode_from_cmdline(cmdline[0],dz))<0) {
            print_messages_and_close_sndfiles(exit_status,is_launched,dz);
            return(exit_status);
        }
        cmdline++;
        cmdlinecnt--;
        // setup_particular_application =
        if((exit_status = setup_frame_application(dz))<0) {
            print_messages_and_close_sndfiles(exit_status,is_launched,dz);
            return(FAILED);
        }
        if((exit_status = count_and_allocate_for_infiles(cmdlinecnt,cmdline,dz))<0) {           // CDP LIB
            print_messages_and_close_sndfiles(exit_status,is_launched,dz);
            return(FAILED);
        }
    } else {
        //parse_TK_data() =
        if((exit_status = parse_sloom_data(argc,argv,&cmdline,&cmdlinecnt,dz))<0) {
            exit_status = print_messages_and_close_sndfiles(exit_status,is_launched,dz);
            return(exit_status);
        }
    }
    //ap = dz->application;
    switch(dz->mode) {
    case(0):        SMEAR = 1;      break;
    case(1):        SMEAR = 2;      break;
    }
    // parse_infile_and_hone_type() =
    if((exit_status = parse_infile_and_check_type(cmdline,dz))<0) {
        exit_status = print_messages_and_close_sndfiles(exit_status,is_launched,dz);
        return(FAILED);
    }
    // setup_param_ranges_and_defaults() =
    if((exit_status = setup_frame_param_ranges_and_defaults(dz))<0) {
        exit_status = print_messages_and_close_sndfiles(exit_status,is_launched,dz);
        return(FAILED);
    }
    // open_first_infile            CDP LIB
    if((exit_status = open_first_infile(cmdline[0],dz))<0) {
        print_messages_and_close_sndfiles(exit_status,is_launched,dz);
        return(FAILED);
    }
    cmdlinecnt--;
    cmdline++;

    //      handle_extra_infiles() : redundant
    // handle_outfile() =
    if((exit_status = handle_the_outfile(&cmdlinecnt,&cmdline,dz))<0) {
        print_messages_and_close_sndfiles(exit_status,is_launched,dz);
        return(FAILED);
    }

    //      handle_formants()                       redundant
    //      handle_formant_quiksearch()     redundant
    if((dz->mode < 3) || (dz->mode == 6)) {
        if((exit_status = read_the_special_data(cmdline[0],dz))<0) {
            print_messages_and_close_sndfiles(exit_status,is_launched,dz);
            return(FAILED);
        }
        cmdlinecnt--;
        cmdline++;
    }
    if((exit_status = read_parameters_and_flags(&cmdline,&cmdlinecnt,dz))<0) {              // CDP LIB
        print_messages_and_close_sndfiles(exit_status,is_launched,dz);
        return(FAILED);
    }
    //      check_param_validity_and_consistency....
    if((exit_status = check_the_param_validity_and_consistency(dz))<0) {
        print_messages_and_close_sndfiles(exit_status,is_launched,dz);
        return(FAILED);
    }
    if(dz->mode != 6) {
        if((exit_status = setup_frame_arrays(dz))<0) {
            print_messages_and_close_sndfiles(exit_status,is_launched,dz);
            return(FAILED);
        }
    }
    is_launched = TRUE;
    dz->bufcnt = 2;
    if((dz->sampbuf = (float **)malloc(sizeof(float *) * (dz->bufcnt+1)))==NULL) {
        sprintf(errstr,"INSUFFICIENT MEMORY establishing sample buffers.\n");
        return(MEMORY_ERROR);
    }
    if((dz->sbufptr = (float **)malloc(sizeof(float *) * dz->bufcnt))==NULL) {
        sprintf(errstr,"INSUFFICIENT MEMORY establishing sample buffer pointers.\n");
        return(MEMORY_ERROR);
    }
    for(n = 0;n <dz->bufcnt; n++)
        dz->sampbuf[n] = dz->sbufptr[n] = (float *)0;
    dz->sampbuf[n] = (float *)0;

    if((exit_status = create_sndbufs(dz))<0) {                                                      // CDP LIB
        print_messages_and_close_sndfiles(exit_status,is_launched,dz);
        return(FAILED);
    }
    //param_preprocess()                                            redundant
    //spec_process_file =
    switch(dz->mode) {
    case(2):
    case(3):
    case(4):
    case(7):
        if((exit_status = reorient(dz))<0) {
            print_messages_and_close_sndfiles(exit_status,is_launched,dz);
            return(FAILED);
        }
        break;
    case(5):
        if((exit_status = swapchans(dz))<0) {
            print_messages_and_close_sndfiles(exit_status,is_launched,dz);
            return(FAILED);
        }
        break;
    case(6):
        if((exit_status = envchans(dz))<0) {
            print_messages_and_close_sndfiles(exit_status,is_launched,dz);
            return(FAILED);
        }
        break;
    default:
        if((exit_status = rotate(dz))<0) {
            print_messages_and_close_sndfiles(exit_status,is_launched,dz);
            return(FAILED);
        }
        break;
    }
    if((exit_status = complete_output(dz))<0) {                                                                             // CDP LIB
        print_messages_and_close_sndfiles(exit_status,is_launched,dz);
        return(FAILED);
    }
    exit_status = print_messages_and_close_sndfiles(FINISHED,is_launched,dz);               // CDP LIB
    free(dz);
    return(SUCCEEDED);
}

/**********************************************
                REPLACED CDP LIB FUNCTIONS
**********************************************/


/****************************** SET_PARAM_DATA *********************************/

int set_param_data(aplptr ap, int special_data,int maxparamcnt,int paramcnt,char *paramlist)
{
    ap->special_data   = (char)special_data;
    ap->param_cnt      = (char)paramcnt;
    ap->max_param_cnt  = (char)maxparamcnt;
    if(ap->max_param_cnt>0) {
        if((ap->param_list = (char *)malloc((size_t)(ap->max_param_cnt+1)))==NULL) {
            sprintf(errstr,"INSUFFICIENT MEMORY: for param_list\n");
            return(MEMORY_ERROR);
        }
        strcpy(ap->param_list,paramlist);
    }
    return(FINISHED);
}

/****************************** SET_VFLGS *********************************/

int set_vflgs
(aplptr ap,char *optflags,int optcnt,char *optlist,char *varflags,int vflagcnt, int vparamcnt,char *varlist)
{
    ap->option_cnt   = (char) optcnt;                       /*RWD added cast */
    if(optcnt) {
        if((ap->option_list = (char *)malloc((size_t)(optcnt+1)))==NULL) {
            sprintf(errstr,"INSUFFICIENT MEMORY: for option_list\n");
            return(MEMORY_ERROR);
        }
        strcpy(ap->option_list,optlist);
        if((ap->option_flags = (char *)malloc((size_t)(optcnt+1)))==NULL) {
            sprintf(errstr,"INSUFFICIENT MEMORY: for option_flags\n");
            return(MEMORY_ERROR);
        }
        strcpy(ap->option_flags,optflags);
    }
    ap->vflag_cnt = (char) vflagcnt;
    ap->variant_param_cnt = (char) vparamcnt;
    if(vflagcnt) {
        if((ap->variant_list  = (char *)malloc((size_t)(vflagcnt+1)))==NULL) {
            sprintf(errstr,"INSUFFICIENT MEMORY: for variant_list\n");
            return(MEMORY_ERROR);
        }
        strcpy(ap->variant_list,varlist);
        if((ap->variant_flags = (char *)malloc((size_t)(vflagcnt+1)))==NULL) {
            sprintf(errstr,"INSUFFICIENT MEMORY: for variant_flags\n");
            return(MEMORY_ERROR);
        }
        strcpy(ap->variant_flags,varflags);

    }
    return(FINISHED);
}

/***************************** APPLICATION_INIT **************************/

int application_init(dataptr dz)
{
    int exit_status;
    int storage_cnt;
    int tipc, brkcnt;
    aplptr ap = dz->application;
    if(ap->vflag_cnt>0)
        initialise_vflags(dz);
    tipc  = ap->max_param_cnt + ap->option_cnt + ap->variant_param_cnt;
    ap->total_input_param_cnt = (char)tipc;
    if(tipc>0) {
        if((exit_status = setup_input_param_range_stores(tipc,ap))<0)
            return(exit_status);
        if((exit_status = setup_input_param_defaultval_stores(tipc,ap))<0)
            return(exit_status);
        if((exit_status = setup_and_init_input_param_activity(dz,tipc))<0)
            return(exit_status);
    }
    brkcnt = tipc;
    //THERE ARE NO INPUTFILE brktables USED IN THIS PROCESS
    if(brkcnt>0) {
        if((exit_status = setup_and_init_input_brktable_constants(dz,brkcnt))<0)
            return(exit_status);
    }
    if((storage_cnt = tipc + ap->internal_param_cnt)>0) {
        if((exit_status = setup_parameter_storage_and_constants(storage_cnt,dz))<0)
            return(exit_status);
        if((exit_status = initialise_is_int_and_no_brk_constants(storage_cnt,dz))<0)
            return(exit_status);
    }
    if((exit_status = mark_parameter_types(dz,ap))<0)
        return(exit_status);

    // establish_infile_constants() replaced by
    dz->infilecnt = 1;
    //establish_bufptrs_and_extra_buffers():
    if((exit_status = setup_internal_arrays_and_array_pointers(dz))<0)
        return(exit_status);
    return(FINISHED);
}

/********************** SETUP_PARAMETER_STORAGE_AND_CONSTANTS ********************/
/* RWD mallo changed to calloc; helps debug verison run as release! */

int setup_parameter_storage_and_constants(int storage_cnt,dataptr dz)
{
    if((dz->param       = (double *)calloc(storage_cnt, sizeof(double)))==NULL) {
        sprintf(errstr,"setup_parameter_storage_and_constants(): 1\n");
        return(MEMORY_ERROR);
    }
    if((dz->iparam      = (int    *)calloc(storage_cnt, sizeof(int)   ))==NULL) {
        sprintf(errstr,"setup_parameter_storage_and_constants(): 2\n");
        return(MEMORY_ERROR);
    }
    if((dz->is_int      = (char   *)calloc(storage_cnt, sizeof(char)))==NULL) {
        sprintf(errstr,"setup_parameter_storage_and_constants(): 3\n");
        return(MEMORY_ERROR);
    }
    if((dz->no_brk      = (char   *)calloc(storage_cnt, sizeof(char)))==NULL) {
        sprintf(errstr,"setup_parameter_storage_and_constants(): 5\n");
        return(MEMORY_ERROR);
    }
    return(FINISHED);
}

/************** INITIALISE_IS_INT_AND_NO_BRK_CONSTANTS *****************/

int initialise_is_int_and_no_brk_constants(int storage_cnt,dataptr dz)
{
    int n;
    for(n=0;n<storage_cnt;n++) {
        dz->is_int[n] = (char)0;
        dz->no_brk[n] = (char)0;
    }
    return(FINISHED);
}

/***************************** MARK_PARAMETER_TYPES **************************/

int mark_parameter_types(dataptr dz,aplptr ap)
{
    int n, m;                                                       /* PARAMS */
    for(n=0;n<ap->max_param_cnt;n++) {
        switch(ap->param_list[n]) {
        case('0'):      break; /* dz->is_active[n] = 0 is default */
        case('i'):      dz->is_active[n] = (char)1; dz->is_int[n] = (char)1;dz->no_brk[n] = (char)1; break;
        case('I'):      dz->is_active[n] = (char)1;     dz->is_int[n] = (char)1;                                                 break;
        case('d'):      dz->is_active[n] = (char)1;                                                     dz->no_brk[n] = (char)1; break;
        case('D'):      dz->is_active[n] = (char)1;     /* normal case: double val or brkpnt file */     break;
        default:
            sprintf(errstr,"Programming error: invalid parameter type in mark_parameter_types()\n");
            return(PROGRAM_ERROR);
        }
    }                                                               /* OPTIONS */
    for(n=0,m=ap->max_param_cnt;n<ap->option_cnt;n++,m++) {
        switch(ap->option_list[n]) {
        case('i'): dz->is_active[m] = (char)1; dz->is_int[m] = (char)1; dz->no_brk[m] = (char)1; break;
        case('I'): dz->is_active[m] = (char)1; dz->is_int[m] = (char)1;                                                  break;
        case('d'): dz->is_active[m] = (char)1;                                                  dz->no_brk[m] = (char)1; break;
        case('D'): dz->is_active[m] = (char)1;  /* normal case: double val or brkpnt file */     break;
        default:
            sprintf(errstr,"Programming error: invalid option type in mark_parameter_types()\n");
            return(PROGRAM_ERROR);
        }
    }                                                               /* VARIANTS */
    for(n=0,m=ap->max_param_cnt + ap->option_cnt;n < ap->variant_param_cnt; n++, m++) {
        switch(ap->variant_list[n]) {
        case('0'): break;
        case('i'): dz->is_active[m] = (char)1; dz->is_int[m] = (char)1; dz->no_brk[m] = (char)1; break;
        case('I'): dz->is_active[m] = (char)1; dz->is_int[m] = (char)1;                                                  break;
        case('d'): dz->is_active[m] = (char)1;                                                  dz->no_brk[m] = (char)1; break;
        case('D'): dz->is_active[m] = (char)1; /* normal case: double val or brkpnt file */              break;
        default:
            sprintf(errstr,"Programming error: invalid variant type in mark_parameter_types()\n");
            return(PROGRAM_ERROR);
        }
    }                                                               /* INTERNAL */
    for(n=0,
            m=ap->max_param_cnt + ap->option_cnt + ap->variant_param_cnt; n<ap->internal_param_cnt; n++,m++) {
        switch(ap->internal_param_list[n]) {
        case('0'):  break;       /* dummy variables: variables not used: but important for internal paream numbering!! */
        case('i'):      dz->is_int[m] = (char)1;        dz->no_brk[m] = (char)1;        break;
        case('d'):                                                              dz->no_brk[m] = (char)1;        break;
        default:
            sprintf(errstr,"Programming error: invalid internal param type in mark_parameter_types()\n");
            return(PROGRAM_ERROR);
        }
    }
    return(FINISHED);
}

/************************ HANDLE_THE_OUTFILE *********************/

int handle_the_outfile(int *cmdlinecnt,char ***cmdline,dataptr dz)
{
    int exit_status;
    char *filename = (*cmdline)[0];
    if(filename[0]=='-' && filename[1]=='f') {
        dz->floatsam_output = 1;
        dz->true_outfile_stype = SAMP_FLOAT;
        filename+= 2;
    }
    if(!sloom) {
        if(file_has_invalid_startchar(filename) || value_is_numeric(filename)) {
            sprintf(errstr,"Outfile name %s has invalid start character(s) or looks too much like a number.\n",filename);
            return(DATA_ERROR);
        }
    }
    strcpy(dz->outfilename,filename);
    if((exit_status = create_sized_outfile(filename,dz))<0)
        return(exit_status);
    (*cmdline)++;
    (*cmdlinecnt)--;
    return(FINISHED);
}

/***************************** ESTABLISH_APPLICATION **************************/

int establish_application(dataptr dz)
{
    aplptr ap;
    if((dz->application = (aplptr)malloc(sizeof (struct applic)))==NULL) {
        sprintf(errstr,"establish_application()\n");
        return(MEMORY_ERROR);
    }
    ap = dz->application;
    memset((char *)ap,0,sizeof(struct applic));
    return(FINISHED);
}

/************************* INITIALISE_VFLAGS *************************/

int initialise_vflags(dataptr dz)
{
    int n;
    if((dz->vflag  = (char *)malloc(dz->application->vflag_cnt * sizeof(char)))==NULL) {
        sprintf(errstr,"INSUFFICIENT MEMORY: vflag store,\n");
        return(MEMORY_ERROR);
    }
    for(n=0;n<dz->application->vflag_cnt;n++)
        dz->vflag[n]  = FALSE;
    return FINISHED;
}

/************************* SETUP_INPUT_PARAM_DEFAULTVALS *************************/

int setup_input_param_defaultval_stores(int tipc,aplptr ap)
{
    int n;
    if((ap->default_val = (double *)malloc(tipc * sizeof(double)))==NULL) {
        sprintf(errstr,"INSUFFICIENT MEMORY for application default values store\n");
        return(MEMORY_ERROR);
    }
    for(n=0;n<tipc;n++)
        ap->default_val[n] = 0.0;
    return(FINISHED);
}

/***************************** SETUP_AND_INIT_INPUT_PARAM_ACTIVITY **************************/

int setup_and_init_input_param_activity(dataptr dz,int tipc)
{
    int n;
    if((dz->is_active = (char   *)malloc((size_t)tipc))==NULL) {
        sprintf(errstr,"setup_and_init_input_param_activity()\n");
        return(MEMORY_ERROR);
    }
    for(n=0;n<tipc;n++)
        dz->is_active[n] = (char)0;
    return(FINISHED);
}

/************************* SETUP_FRAME_APPLICATION *******************/

int setup_frame_application(dataptr dz)
{
    int exit_status;
    aplptr ap;
    if((exit_status = establish_application(dz))<0)         // GLOBAL
        return(FAILED);
    ap = dz->application;
    // SEE parstruct FOR EXPLANATION of next 2 functions
    switch(dz->mode) {
    case(0):
        if((exit_status = set_param_data(ap,FRAMEDATA   ,1,1,"D"))<0)
            return(FAILED);
        if((exit_status = set_vflgs(ap,"s",1,"d","",0,0,""))<0)
            return(FAILED);
        break;
    case(1):
        if((exit_status = set_param_data(ap,FRAMEDATA   ,2,2,"DD"))<0)
            return(FAILED);
        if((exit_status = set_vflgs(ap,"s",1,"d","",0,0,""))<0)
            return(FAILED);
        break;
    case(2):
        if((exit_status = set_param_data(ap,FRAMEDATA   ,0,0,""))<0)
            return(FAILED);
        if((exit_status = set_vflgs(ap,"",0,"","",0,0,""))<0)
            return(FAILED);
        break;
    case(3):
        if((exit_status = set_param_data(ap,0,1,1,"d"))<0)
            return(FAILED);
        if((exit_status = set_vflgs(ap,"",0,"","",0,0,""))<0)
            return(FAILED);
        break;
    case(4):
        if((exit_status = set_param_data(ap,0,0,0,""))<0)
            return(FAILED);
        if((exit_status = set_vflgs(ap,"",0,"","b",1,0,"0"))<0)
            return(FAILED);
        break;
    case(5):
        if((exit_status = set_param_data(ap,0,2,2,"ii"))<0)
            return(FAILED);
        if((exit_status = set_vflgs(ap,"",0,"","",0,0,""))<0)
            return(FAILED);
        break;
    case(6):
        if((exit_status = set_param_data(ap,FRAMEDATA,1,1,"D"))<0)
            return(FAILED);
        if((exit_status = set_vflgs(ap,"",0,"","",0,0,"0"))<0)
            return(FAILED);
        break;
    case(7):
        if((exit_status = set_param_data(ap,0,0,0,""))<0)
            return(FAILED);
        if((exit_status = set_vflgs(ap,"",0,"","b",1,0,"0"))<0)
            return(FAILED);
        break;
    }
    // set_legal_infile_structure -->
    dz->has_otherfile = FALSE;
    // assign_process_logic -->
    dz->input_data_type = SNDFILES_ONLY;
    dz->process_type        = EQUAL_SNDFILE;
    dz->outfiletype         = SNDFILE_OUT;
    return application_init(dz);    //GLOBAL
}

/************************* PARSE_INFILE_AND_CHECK_TYPE *******************/

int parse_infile_and_check_type(char **cmdline,dataptr dz)
{
    int exit_status;
    infileptr infile_info;
    if(!sloom) {
        if((infile_info = (infileptr)malloc(sizeof(struct filedata)))==NULL) {
            sprintf(errstr,"INSUFFICIENT MEMORY for infile structure to test file data.");
            return(MEMORY_ERROR);
        } else if((exit_status = cdparse(cmdline[0],infile_info))<0) {
            sprintf(errstr,"Failed to parse input file %s\n",cmdline[0]);
            return(PROGRAM_ERROR);
        } else if(infile_info->filetype != SNDFILE)  {
            sprintf(errstr,"File %s is not of correct type\n",cmdline[0]);
            return(DATA_ERROR);
        } else if(infile_info->channels < 2)  {
            sprintf(errstr,"File %s is not of correct type (must be multichannel)\n",cmdline[0]);
            return(DATA_ERROR);
        }
        if((dz->mode == 1) && ODD(infile_info->channels)) {
            sprintf(errstr,"File %s is not of correct type (must have even number of channels)\n",cmdline[0]);
            return(DATA_ERROR);
        }
        if((exit_status = copy_parse_info_to_main_structure(infile_info,dz))<0) {
            sprintf(errstr,"Failed to copy file parsing information\n");
            return(PROGRAM_ERROR);
        }
        free(infile_info);
    }
    return(FINISHED);
}

/************************* SETUP_FRAME_PARAM_RANGES_AND_DEFAULTS *******************/

int setup_frame_param_ranges_and_defaults(dataptr dz)
{
    int exit_status;
    aplptr ap = dz->application;
    // set_param_ranges()
    ap->total_input_param_cnt = (char)(ap->max_param_cnt + ap->option_cnt + ap->variant_param_cnt);
    // NB total_input_param_cnt is > 0 !!!
    if((exit_status = setup_input_param_range_stores(ap->total_input_param_cnt,ap))<0)
        return(FAILED);
    // get_param_ranges()
    switch(dz->mode) {
    case(1):
        ap->lo[1]       = -500.0;
        ap->hi[1]       = 500.0;
        ap->default_val[1]      = -1.0;
        /* fall thro */
    case(0):
        ap->lo[0]       = -MAX_ROT;
        ap->hi[0]       = MAX_ROT;
        ap->default_val[0]      = 1.0;
        ap->lo[SMEAR]   = 0.0;
        ap->hi[SMEAR]   = 0.5;
        ap->default_val[SMEAR]  = 0.0;
        break;
    case(2):
    case(4):
        break;
    case(3):
        ap->lo[0]       = 0.0;
        ap->hi[0]       = 16.5;
        ap->default_val[0]      = 1.0;
        break;
    case(5):
        ap->lo[0]       = 1.0;
        ap->hi[0]       = 16.0;
        ap->default_val[0]      = 1.0;
        ap->lo[1]       = 1.0;
        ap->hi[1]       = 16.0;
        ap->default_val[1]      = 2.0;
        break;
    case(6):
        ap->lo[0]       = 0.0;
        ap->hi[0]       = 1.0;
        ap->default_val[0]      = 0.0;
        break;
    }
    if(!sloom)
        put_default_vals_in_all_params(dz);
    return(FINISHED);
}

/********************************* PARSE_SLOOM_DATA *********************************/

int parse_sloom_data(int argc,char *argv[],char ***cmdline,int *cmdlinecnt,dataptr dz)
{
    int exit_status;
    int cnt = 1, infilecnt;
    int filesize, insams, inbrksize;
    double dummy;
    int true_cnt = 0;
    //    aplptr ap;

    while(cnt<=PRE_CMDLINE_DATACNT) {
        if(cnt > argc) {
            sprintf(errstr,"Insufficient data sent from TK\n");
            return(DATA_ERROR);
        }
        switch(cnt) {
        case(1):
            if(sscanf(argv[cnt],"%d",&dz->process)!=1) {
                sprintf(errstr,"Cannot read process no. sent from TK\n");
                return(DATA_ERROR);
            }
            break;

        case(2):
            if(sscanf(argv[cnt],"%d",&dz->mode)!=1) {
                sprintf(errstr,"Cannot read mode no. sent from TK\n");
                return(DATA_ERROR);
            }
            if(dz->mode > 0)
                dz->mode--;
            //setup_particular_application() =
            if((exit_status = setup_frame_application(dz))<0)
                return(exit_status);
            //ap = dz->application;
            break;

        case(3):
            if(sscanf(argv[cnt],"%d",&infilecnt)!=1) {
                sprintf(errstr,"Cannot read infilecnt sent from TK\n");
                return(DATA_ERROR);
            }
            if(infilecnt < 1) {
                true_cnt = cnt + 1;
                cnt = PRE_CMDLINE_DATACNT;      /* force exit from loop after assign_file_data_storage */
            }
            if((exit_status = assign_file_data_storage(infilecnt,dz))<0)
                return(exit_status);
            break;
        case(INPUT_FILETYPE+4):
            if(sscanf(argv[cnt],"%d",&dz->infile->filetype)!=1) {
                sprintf(errstr,"Cannot read filetype sent from TK (%s)\n",argv[cnt]);
                return(DATA_ERROR);
            }
            break;
        case(INPUT_FILESIZE+4):
            if(sscanf(argv[cnt],"%d",&filesize)!=1) {
                sprintf(errstr,"Cannot read infilesize sent from TK\n");
                return(DATA_ERROR);
            }
            dz->insams[0] = filesize;
            break;
        case(INPUT_INSAMS+4):
            if(sscanf(argv[cnt],"%d",&insams)!=1) {
                sprintf(errstr,"Cannot read insams sent from TK\n");
                return(DATA_ERROR);
            }
            dz->insams[0] = insams;
            break;
        case(INPUT_SRATE+4):
            if(sscanf(argv[cnt],"%d",&dz->infile->srate)!=1) {
                sprintf(errstr,"Cannot read srate sent from TK\n");
                return(DATA_ERROR);
            }
            break;
        case(INPUT_CHANNELS+4):
            if(sscanf(argv[cnt],"%d",&dz->infile->channels)!=1) {
                sprintf(errstr,"Cannot read channels sent from TK\n");
                return(DATA_ERROR);
            }
            break;
        case(INPUT_STYPE+4):
            if(sscanf(argv[cnt],"%d",&dz->infile->stype)!=1) {
                sprintf(errstr,"Cannot read stype sent from TK\n");
                return(DATA_ERROR);
            }
            break;
        case(INPUT_ORIGSTYPE+4):
            if(sscanf(argv[cnt],"%d",&dz->infile->origstype)!=1) {
                sprintf(errstr,"Cannot read origstype sent from TK\n");
                return(DATA_ERROR);
            }
            break;
        case(INPUT_ORIGRATE+4):
            if(sscanf(argv[cnt],"%d",&dz->infile->origrate)!=1) {
                sprintf(errstr,"Cannot read origrate sent from TK\n");
                return(DATA_ERROR);
            }
            break;
        case(INPUT_MLEN+4):
            if(sscanf(argv[cnt],"%d",&dz->infile->Mlen)!=1) {
                sprintf(errstr,"Cannot read Mlen sent from TK\n");
                return(DATA_ERROR);
            }
            break;
        case(INPUT_DFAC+4):
            if(sscanf(argv[cnt],"%d",&dz->infile->Dfac)!=1) {
                sprintf(errstr,"Cannot read Dfac sent from TK\n");
                return(DATA_ERROR);
            }
            break;
        case(INPUT_ORIGCHANS+4):
            if(sscanf(argv[cnt],"%d",&dz->infile->origchans)!=1) {
                sprintf(errstr,"Cannot read origchans sent from TK\n");
                return(DATA_ERROR);
            }
            break;
        case(INPUT_SPECENVCNT+4):
            if(sscanf(argv[cnt],"%d",&dz->infile->specenvcnt)!=1) {
                sprintf(errstr,"Cannot read specenvcnt sent from TK\n");
                return(DATA_ERROR);
            }
            dz->specenvcnt = dz->infile->specenvcnt;
            break;
        case(INPUT_WANTED+4):
            if(sscanf(argv[cnt],"%d",&dz->wanted)!=1) {
                sprintf(errstr,"Cannot read wanted sent from TK\n");
                return(DATA_ERROR);
            }
            break;
        case(INPUT_WLENGTH+4):
            if(sscanf(argv[cnt],"%d",&dz->wlength)!=1) {
                sprintf(errstr,"Cannot read wlength sent from TK\n");
                return(DATA_ERROR);
            }
            break;
        case(INPUT_OUT_CHANS+4):
            if(sscanf(argv[cnt],"%d",&dz->out_chans)!=1) {
                sprintf(errstr,"Cannot read out_chans sent from TK\n");
                return(DATA_ERROR);
            }
            break;
            /* RWD these chanegs to samps - tk will have to deal with that! */
        case(INPUT_DESCRIPTOR_BYTES+4):
            if(sscanf(argv[cnt],"%d",&dz->descriptor_samps)!=1) {
                sprintf(errstr,"Cannot read descriptor_samps sent from TK\n");
                return(DATA_ERROR);
            }
            break;
        case(INPUT_IS_TRANSPOS+4):
            if(sscanf(argv[cnt],"%d",&dz->is_transpos)!=1) {
                sprintf(errstr,"Cannot read is_transpos sent from TK\n");
                return(DATA_ERROR);
            }
            break;
        case(INPUT_COULD_BE_TRANSPOS+4):
            if(sscanf(argv[cnt],"%d",&dz->could_be_transpos)!=1) {
                sprintf(errstr,"Cannot read could_be_transpos sent from TK\n");
                return(DATA_ERROR);
            }
            break;
        case(INPUT_COULD_BE_PITCH+4):
            if(sscanf(argv[cnt],"%d",&dz->could_be_pitch)!=1) {
                sprintf(errstr,"Cannot read could_be_pitch sent from TK\n");
                return(DATA_ERROR);
            }
            break;
        case(INPUT_DIFFERENT_SRATES+4):
            if(sscanf(argv[cnt],"%d",&dz->different_srates)!=1) {
                sprintf(errstr,"Cannot read different_srates sent from TK\n");
                return(DATA_ERROR);
            }
            break;
        case(INPUT_DUPLICATE_SNDS+4):
            if(sscanf(argv[cnt],"%d",&dz->duplicate_snds)!=1) {
                sprintf(errstr,"Cannot read duplicate_snds sent from TK\n");
                return(DATA_ERROR);
            }
            break;
        case(INPUT_BRKSIZE+4):
            if(sscanf(argv[cnt],"%d",&inbrksize)!=1) {
                sprintf(errstr,"Cannot read brksize sent from TK\n");
                return(DATA_ERROR);
            }
            if(inbrksize > 0) {
                switch(dz->input_data_type) {
                case(WORDLIST_ONLY):
                    break;
                case(PITCH_AND_PITCH):
                case(PITCH_AND_TRANSPOS):
                case(TRANSPOS_AND_TRANSPOS):
                    dz->tempsize = inbrksize;
                    break;
                case(BRKFILES_ONLY):
                case(UNRANGED_BRKFILE_ONLY):
                case(DB_BRKFILES_ONLY):
                case(ALL_FILES):
                case(ANY_NUMBER_OF_ANY_FILES):
                    if(dz->extrabrkno < 0) {
                        sprintf(errstr,"Storage location number for brktable not established by CDP.\n");
                        return(DATA_ERROR);
                    }
                    if(dz->brksize == NULL) {
                        sprintf(errstr,"CDP has not established storage space for input brktable.\n");
                        return(PROGRAM_ERROR);
                    }
                    dz->brksize[dz->extrabrkno]     = inbrksize;
                    break;
                default:
                    sprintf(errstr,"TK sent brktablesize > 0 for input_data_type [%d] not using brktables.\n",
                            dz->input_data_type);
                    return(PROGRAM_ERROR);
                }
                break;
            }
            break;
        case(INPUT_NUMSIZE+4):
            if(sscanf(argv[cnt],"%d",&dz->numsize)!=1) {
                sprintf(errstr,"Cannot read numsize sent from TK\n");
                return(DATA_ERROR);
            }
            break;
        case(INPUT_LINECNT+4):
            if(sscanf(argv[cnt],"%d",&dz->linecnt)!=1) {
                sprintf(errstr,"Cannot read linecnt sent from TK\n");
                return(DATA_ERROR);
            }
            break;
        case(INPUT_ALL_WORDS+4):
            if(sscanf(argv[cnt],"%d",&dz->all_words)!=1) {
                sprintf(errstr,"Cannot read all_words sent from TK\n");
                return(DATA_ERROR);
            }
            break;
        case(INPUT_ARATE+4):
            if(sscanf(argv[cnt],"%f",&dz->infile->arate)!=1) {
                sprintf(errstr,"Cannot read arate sent from TK\n");
                return(DATA_ERROR);
            }
            break;
        case(INPUT_FRAMETIME+4):
            if(sscanf(argv[cnt],"%lf",&dummy)!=1) {
                sprintf(errstr,"Cannot read frametime sent from TK\n");
                return(DATA_ERROR);
            }
            dz->frametime = (float)dummy;
            break;
        case(INPUT_WINDOW_SIZE+4):
            if(sscanf(argv[cnt],"%f",&dz->infile->window_size)!=1) {
                sprintf(errstr,"Cannot read window_size sent from TK\n");
                return(DATA_ERROR);
            }
            break;
        case(INPUT_NYQUIST+4):
            if(sscanf(argv[cnt],"%lf",&dz->nyquist)!=1) {
                sprintf(errstr,"Cannot read nyquist sent from TK\n");
                return(DATA_ERROR);
            }
            break;
        case(INPUT_DURATION+4):
            if(sscanf(argv[cnt],"%lf",&dz->duration)!=1) {
                sprintf(errstr,"Cannot read duration sent from TK\n");
                return(DATA_ERROR);
            }
            break;
        case(INPUT_MINBRK+4):
            if(sscanf(argv[cnt],"%lf",&dz->minbrk)!=1) {
                sprintf(errstr,"Cannot read minbrk sent from TK\n");
                return(DATA_ERROR);
            }
            break;
        case(INPUT_MAXBRK+4):
            if(sscanf(argv[cnt],"%lf",&dz->maxbrk)!=1) {
                sprintf(errstr,"Cannot read maxbrk sent from TK\n");
                return(DATA_ERROR);
            }
            break;
        case(INPUT_MINNUM+4):
            if(sscanf(argv[cnt],"%lf",&dz->minnum)!=1) {
                sprintf(errstr,"Cannot read minnum sent from TK\n");
                return(DATA_ERROR);
            }
            break;
        case(INPUT_MAXNUM+4):
            if(sscanf(argv[cnt],"%lf",&dz->maxnum)!=1) {
                sprintf(errstr,"Cannot read maxnum sent from TK\n");
                return(DATA_ERROR);
            }
            break;
        default:
            sprintf(errstr,"case switch item missing: parse_sloom_data()\n");
            return(PROGRAM_ERROR);
        }
        cnt++;
    }
    if(cnt!=PRE_CMDLINE_DATACNT+1) {
        sprintf(errstr,"Insufficient pre-cmdline params sent from TK\n");
        return(DATA_ERROR);
    }

    if(true_cnt)
        cnt = true_cnt;
    *cmdlinecnt = 0;

    while(cnt < argc) {
        if((exit_status = get_tk_cmdline_word(cmdlinecnt,cmdline,argv[cnt]))<0)
            return(exit_status);
        cnt++;
    }
    return(FINISHED);
}

/********************************* GET_TK_CMDLINE_WORD *********************************/

int get_tk_cmdline_word(int *cmdlinecnt,char ***cmdline,char *q)
{
    if(*cmdlinecnt==0) {
        if((*cmdline = (char **)malloc(sizeof(char *)))==NULL)  {
            sprintf(errstr,"INSUFFICIENT MEMORY for TK cmdline array.\n");
            return(MEMORY_ERROR);
        }
    } else {
        if((*cmdline = (char **)realloc(*cmdline,((*cmdlinecnt)+1) * sizeof(char *)))==NULL)    {
            sprintf(errstr,"INSUFFICIENT MEMORY for TK cmdline array.\n");
            return(MEMORY_ERROR);
        }
    }
    if(((*cmdline)[*cmdlinecnt] = (char *)malloc((strlen(q) + 1) * sizeof(char)))==NULL)    {
        sprintf(errstr,"INSUFFICIENT MEMORY for TK cmdline item %d.\n",(*cmdlinecnt)+1);
        return(MEMORY_ERROR);
    }
    strcpy((*cmdline)[*cmdlinecnt],q);
    (*cmdlinecnt)++;
    return(FINISHED);
}


/****************************** ASSIGN_FILE_DATA_STORAGE *********************************/

int assign_file_data_storage(int infilecnt,dataptr dz)
{
    int exit_status;
    int no_sndfile_system_files = FALSE;
    dz->infilecnt = infilecnt;
    if((exit_status = allocate_filespace(dz))<0)
        return(exit_status);
    if(no_sndfile_system_files)
        dz->infilecnt = 0;
    return(FINISHED);
}

/************************* SETUP_INTERNAL_ARRAYS_AND_ARRAY_POINTERS *******************/

int setup_internal_arrays_and_array_pointers(dataptr dz)
{
    int n;
    dz->larray_cnt = 7;
    dz->array_cnt = 4;
    if((dz->parray  = (double **)malloc(dz->array_cnt * sizeof(double *)))==NULL) {
        sprintf(errstr,"INSUFFICIENT MEMORY for internal double array.\n");
        return(MEMORY_ERROR);
    }
    if((dz->lparray  = (int **)malloc(dz->larray_cnt * sizeof(int *)))==NULL) {
        sprintf(errstr,"INSUFFICIENT MEMORY for internal long arrays.\n");
        return(MEMORY_ERROR);
    }
    for(n=0;n<dz->larray_cnt;n++)
        dz->lparray[n] = NULL;
    return(FINISHED);
}

/************************* redundant functions: to ensure libs compile OK *******************/

int assign_process_logic(dataptr dz)
{
    return(FINISHED);
}

void set_legal_infile_structure(dataptr dz)
{}

int set_legal_internalparam_structure(int process,int mode,aplptr ap)
{
    return(FINISHED);
}

int establish_bufptrs_and_extra_buffers(dataptr dz)
{
    return(FINISHED);
}

int read_special_data(char *str,dataptr dz)
{
    return(FINISHED);
}

int inner_loop
(int *peakscore,int *descnt,int *in_start_portion,int *least,int *pitchcnt,int windows_in_buf,dataptr dz)
{
    return(FINISHED);
}

int get_process_no(char *prog_identifier_from_cmdline,dataptr dz)
{
    return(FINISHED);
}


/******************************** USAGE1 ********************************/

int usage1(void)
{
    usage2("shift");
    return(USAGE_ONLY);
}

/**************************** SETUP_FRAME_ARRAYS *****************************/

int setup_frame_arrays(dataptr dz)
{
    int chans = dz->infile->channels;

    if((dz->lparray[FRAME_OCHAN_LEFT]       = malloc(chans * sizeof(int)))==NULL) {
        sprintf(errstr,"Insufficient memory to store left-rotation data.\n");
        return(MEMORY_ERROR);
    }
    if((dz->lparray[FRAME_OCHAN_RIGHT]      = malloc(chans * sizeof(int)))==NULL) {
        sprintf(errstr,"Insufficient memory to store right-rotation data.\n");
        return(MEMORY_ERROR);
    }
    if((dz->lparray[FRAME_OL]                       = malloc(chans * sizeof(int)))==NULL) {
        sprintf(errstr,"Insufficient memory to store snaked-left-rotation data.\n");
        return(MEMORY_ERROR);
    }
    if((dz->lparray[FRAME_OR]                       = malloc(chans * sizeof(int)))==NULL) {
        sprintf(errstr,"Insufficient memory to store snaked-right-rotation data.\n");
        return(MEMORY_ERROR);
    }
    if((dz->lparray[FRAME_SNAKEPERM]        = malloc(chans * sizeof(int)))==NULL) {
        sprintf(errstr,"Insufficient memory to store current snake permutation data.\n");
        return(MEMORY_ERROR);
    }
    if((dz->lparray[FRAME_ORIENT]           = malloc(2 * sizeof(int)))==NULL) {
        sprintf(errstr,"Insufficient memory to store first_orientation vals.\n");
        return(MEMORY_ERROR);
    }
    if((dz->parray[FRAME_POS]                       = malloc(2 * sizeof(double)))==NULL) {
        sprintf(errstr,"Insufficient memory to store rotation data.\n");
        return(MEMORY_ERROR);
    }
    if((dz->parray[FRAME_STEP]                      = malloc(2 * sizeof(double)))==NULL) {
        sprintf(errstr,"Insufficient memory to store spatial step data.\n");
        return(MEMORY_ERROR);
    }
    if((dz->parray[FRAME_LLEVEL]            = malloc(2 * sizeof(double)))==NULL) {
        sprintf(errstr,"Insufficient memory to store left level vals.\n");
        return(MEMORY_ERROR);
    }
    if((dz->parray[FRAME_RLEVEL]            = malloc(2 * sizeof(double)))==NULL) {
        sprintf(errstr,"Insufficient memory to store right level vals.\n");
        return(MEMORY_ERROR);
    }
    return FINISHED;
}

/********************************************************************************************/

int get_the_process_no(char *prog_identifier_from_cmdline,dataptr dz)
{
    if(!strcmp(prog_identifier_from_cmdline,"shift"))                               dz->process = FRAME;
    else {
        sprintf(errstr,"Unknown program identification string '%s'\n",prog_identifier_from_cmdline);
        return(USAGE_ONLY);
    }
    return(FINISHED);
}

/****************************** GET_MODE *********************************/

int get_the_mode_from_cmdline(char *str,dataptr dz)
{
    if(sscanf(str,"%d",&dz->mode)!=1) {
        sprintf(errstr,"Cannot read mode of program.\n");
        return(USAGE_ONLY);
    }
    if(dz->mode <= 0 || dz->mode > dz->maxmode) {
        sprintf(errstr,"Program mode value [%d] is out of range [1 - %d].\n",dz->mode,dz->maxmode);
        return(USAGE_ONLY);
    }
    dz->mode--;             /* CHANGE TO INTERNAL REPRESENTATION OF MODE NO */
    return(FINISHED);
}

/******************************** SETUP_AND_INIT_INPUT_BRKTABLE_CONSTANTS ********************************/

int setup_and_init_input_brktable_constants(dataptr dz,int brkcnt)
{
    int n;
    if((dz->brk      = (double **)malloc(brkcnt * sizeof(double *)))==NULL) {
        sprintf(errstr,"setup_and_init_input_brktable_constants(): 1\n");
        return(MEMORY_ERROR);
    }
    if((dz->brkptr   = (double **)malloc(brkcnt * sizeof(double *)))==NULL) {
        sprintf(errstr,"setup_and_init_input_brktable_constants(): 6\n");
        return(MEMORY_ERROR);
    }
    if((dz->brksize  = (int    *)malloc(brkcnt * sizeof(int)))==NULL) {
        sprintf(errstr,"setup_and_init_input_brktable_constants(): 2\n");
        return(MEMORY_ERROR);
    }
    if((dz->firstval = (double  *)malloc(brkcnt * sizeof(double)))==NULL) {
        sprintf(errstr,"setup_and_init_input_brktable_constants(): 3\n");
        return(MEMORY_ERROR);
    }
    if((dz->lastind  = (double  *)malloc(brkcnt * sizeof(double)))==NULL) {
        sprintf(errstr,"setup_and_init_input_brktable_constants(): 4\n");
        return(MEMORY_ERROR);
    }
    if((dz->lastval  = (double  *)malloc(brkcnt * sizeof(double)))==NULL) {
        sprintf(errstr,"setup_and_init_input_brktable_constants(): 5\n");
        return(MEMORY_ERROR);
    }
    if((dz->brkinit  = (int     *)malloc(brkcnt * sizeof(int)))==NULL) {
        sprintf(errstr,"setup_and_init_input_brktable_constants(): 7\n");
        return(MEMORY_ERROR);
    }
    for(n=0;n<brkcnt;n++) {
        dz->brk[n]     = NULL;
        dz->brkptr[n]  = NULL;
        dz->brkinit[n] = 0;
        dz->brksize[n] = 0;
    }
    return(FINISHED);
}

/******************************** USAGE2 ********************************/

int usage2(char *str)
{
    if(!strcmp(str,"shift")) {
        fprintf(stderr,
                "USAGE:\n"
                "frame shift 1 infile outfile snake rotation [-ssmear]\n"
                "frame shift 2 infile outfile snake rotation1 rotation2 [-ssmear]\n"
                "frame shift 3 infile outfile reorient\n"
                "frame shift 4 infile outfile mirrorplane\n"
                "frame shift 5 infile outfile [-b]\n"
                "frame shift 6 infile outfile swapA swapB\n"
                "frame shift 7 infile outfile chaninfo gain\n"
                "frame shift 8 infile outfile [-b]\n"
                "\n"
                "Modes 1 & 2 Rotate the entire frame of a multichannel file.\n"
                "Mode 3 Changes the channel assignment of a multichannel file.\n"
                "Mode 4 Mirrors the channel output around specified mirrorplane.\n"
                "Mode 5 Converts between ring-numbered & bilaterally numbered outchans.\n"
                "Mode 6 Swaps any pair of channels (swapA and swapB).\n"
                "Mode 7 Allows any channel, or set of channels, to be enveloped,\n"
                "       independently of the other channels.\n"
                "Mode 8 Converts between ring-numbered & BEAST bilateral numbering.\n"
                "\n"
                "ROTATION    rotation-rate in cycles (complete frame-rotations) per sec.\n"
                "            Mode 2 (only with files with even number of input channels)\n"
                "            rotates odd & even chans independently; has 2 rotation vals.\n"
                "            Negative values produce anticlockwise rotation.\n"
                "            Rotation rate can vary through time. Range -500 to +500.\n"
                "SMEAR       Extent to which channel-signals bleed onto adjacent chans.\n"
                "            (range 0 to 0.5 : default 0)\n"
                "SNAKE       In clockwise rotation,in (e.g.) 8 chans, input chan-1 follows\n"
                "            the route 1->2->3->4->5->6->7->8->1 etc. around lspkrs.\n"
                "            Other input chans form a \"snake\" following chan-1 round.\n"
                "            To produce rotation (default) set '\"snake\" to ZERO.\n"
                "            HOWEVER, channels might snake along a different route,\n"
                "            & route (which could vary over time) can be specified\n"
                "            in a data file of \"time : snake-list\" values\n"
                "            e.g. might specify route at time zero ,for 8-chan file\n"
                "            \"0.0 8 6 5 2 7 3 4 1\" & change route at a later time\n"
                "            e.g. \"1.378245 4 1 5 2 6 7 8 3\"\n"
                "            1st time-val in data must be zero. Times must increase.\n"
                "            IN MODE 2, odd & even chans rotate independently.\n"
                "            1->3->5->7->1 etc and 2->4->6->8->2 etc\n"
                "            Snake data directs motion round a different route.\n"
                "            e.g.  the snake \"8 6 5 2 7 3 4 1\" above\n"
                "            produces one snake around the odd entries\n"
                "            i.e. 8 -> 5 -> 7 -> 4 -> 8 etc\n"
                "            and a 2nd snake around the even entries\n"
                "            i.e. 6 -> 2 -> 3 -> 1 -> 6 etc\n"
                "REORIENT    List of ALL input chans, in new positions they will have.\n"
                "            e.g. for 4-chans: Data 4 1 2 3\n"
                "            sends Ch1 to 4, Ch2 -> 1, Ch3 -> 2 and Ch4 -> 3\n"
                "MIRRORPLANE Line around which frame is (symmetrically) mirrored.\n"
                "            Values can be any (integer) outchannel number OR\n"
                "            any half-way position between outchans e.g. 1.5, 2.5\n"
                "            With N chans, 'N.5' lies between Nth & 1st chan.\n"
                "-b (Mode 5) Convert bilateral to ring (Default, ring to bilateral).\n"
                "            Numbering of outchans can be ring, or bilateral.\n"
                "            e.g. for 7 outchans ...\n"
                "                 RING                   BILATERAL\n"
                "                   1                        1\n"
                "                7     2                  2     3\n"
                "               6       3                4       5\n"
                "                5     4                  6     7\n"
                "            All multichan pan programs assume RING numbering.\n"
                "            Use this mode to convert out of and into bilateral format.\n"
                "-b (Mode 8) Convert BEAST bilateral to ring (Default, ring to BEAST).\n"
                "            BEAST bilateral numbering for 8 outchans ...\n"
                "                 RING                     BEAST\n"
                "                   1                        7\n"
                "                8     2                  1     2\n"
                "               7       3                3       4\n"
                "                6     4                  5     6\n"
                "                   5                        8\n"
                "SWAPA,SWAPB The 2 channels that are to be swapped.\n"
                "CHANINFO    A single channel number, or a list of channels in a file.\n"
                "GAIN        Gain to apply to enveloped channels (can vary over time).\n");
    } else
        fprintf(stdout,"Unknown option '%s'\n",str);
    return(USAGE_ONLY);
}

int usage3(char *str1,char *str2)
{
    fprintf(stderr,"Insufficient parameters on command line.\n");
    return(USAGE_ONLY);
}

/******************************** FRAME ********************************/

int rotate(dataptr dz)
{
    int exit_status, n;
    int chans = dz->infile->channels, out_lspkr_step;               /* out_lspkr_step: For single rotation, step between adjacent lspkrs, out_lspkr_step is 1 */
    double time, srate = (double)dz->infile->srate;                 /* For double rotation, step between even lspkrs (or between odd), out_lspkr_step is 2 */
    int nextclick;
    int click = (int)round(srate/(double)MAX_ROT) * chans; /* Timestep between each reading of rotation-speed brktables */
    double *inter_lspkr_position = dz->parray[FRAME_POS];   /* relative position (0-1) between lpskr pair (currently) associated with input chan */
    /* NB same VALUE for ALL input chans, but output-lspkr-pair different for each input chan */
    double *step      = dz->parray[FRAME_STEP];                             /* change in relative-position between lspkr-pair */
    double *llevel    = dz->parray[FRAME_LLEVEL];                   /* level on 'left' lpskr of pair, to produce apparent motion */
    double *rlevel    = dz->parray[FRAME_RLEVEL];                   /* level on 'right' lpskr of pair, to produce apparent motion */
    int *orient      = dz->lparray[FRAME_ORIENT];                   /* first non-zero motion; either clock or anticlock */
    int *ochan_left  = dz->lparray[FRAME_OCHAN_LEFT];               /* 'left' lspkr of output-lspkr pair currently associated with specific input-channel */
    int *ochan_right = dz->lparray[FRAME_OCHAN_RIGHT];              /* 'right' lspkr of output-lspkr pair currently associated with specific input-channel */
    int *ol          = dz->lparray[FRAME_OL];                               /* 'left' lspkr of output-lspkr pair once 'snaking' is factored in */
    int *or           = dz->lparray[FRAME_OR];                              /* 'right' lspkr of output-lspkr pair once 'snaking' is factored in */
    int *snakeperm   = dz->lparray[FRAME_SNAKEPERM];                /* Current snaking-path */
    int insampcnt, bufpos, inhere, outhere;
    float *ibuf = dz->sampbuf[0], *obuf = dz->sampbuf[1];
    double lsig, rsig;                              /* input signal sent to 'left' and to 'right' lspkrs at current out-location. */
    double smearcompensate = 1.0;   /* Reduction in principle dignal to allow for sigs from adjacent chans been smeared into it. */

    if(dz->param[SMEAR] > 0.0)
        smearcompensate = 1 - (2.0 * dz->param[SMEAR]);

    time = 0.0;
    click = (int)round(srate/(double)MAX_ROT) * chans; /* Timestep between each reading of rotation-speed brktables */

    /* ESTABLISH VALUE OF FIRST SPATIAL STEP, AND ORIENTATION OF FIRST MOTION (clock or anticlock) */

    if((exit_status = read_values_from_all_existing_brktables(0.0,dz))<0)
        return(exit_status);
    step[0] = (dz->param[ROTATION0]/srate) * chans;
    orient[0] = get_first_rotation_orientation(0,dz);
    if(dz->mode == 1) {
        step[1] = (dz->param[ROTATION1]/srate) * chans;
        orient[1] = get_first_rotation_orientation(1,dz);
        if((orient[0] == 0) && (orient[1] == 0)) {
            sprintf(errstr,"No rotations specified (rotation speeds always zero)\n");
            return(DATA_ERROR);
        }
        out_lspkr_step = 2;     /* motions are only from an even lspkr to another even lpskr, or from an odd lspkr to another odd lspkr */
    } else {
        out_lspkr_step = 1;     /* motion moves from one lspkr to any other */
    }
    /*  IF THERE IS SNAKING, SETUP FIRST SNAKING-ROUTE */

    if(dz->itemcnt) {
        dz->next_snake_loc = 0;
        get_next_snake(dz);
    }

    /* ESTABLISH CHANNEL-PAIRS BETWEEN WHICH INPUT-CHANNELS MOVE, INITIALLY, AND ESTABLISH INITIAL INTER-SPEAKER POSITION */

    if(dz->mode == 0) {
        if(orient[0] >= 0) {                                    /* clockwise */
            for(n=0;n<chans;n++) {
                ochan_left[n] = n;                              /* output channel starts at location of input chan */
                ol[n] = ochan_left[n];
                ochan_right[n] = (n+out_lspkr_step) % chans;    /*input chans will move rightwards to adjacent output channel */
                or[n] = ochan_right[n];
                if(dz->itemcnt)                                 /* If there is snaking, 'adjacency' is redefined by the snaking-path */
                    or[n] = (int)snakeperm[or[n]];
            }
            inter_lspkr_position[0] = -step[0];     /* Offset to left at start, so when algo starts to run by stepping to right, it's set back to initial position at 0 */
        } else {                                                        /* anticlockwise */
            for(n=0;n<chans;n++) {
                ochan_right[n] = n;                             /* output channel starts at location of input chan */
                or[n] = ochan_right[n];
                ochan_left[n] = n - out_lspkr_step;     /*input chans will move leftwards to adjacent output channel */
                if(ochan_left[n] < 0)
                    ochan_left[n] += chans;
                ol[n] = ochan_left[n];
                if(dz->itemcnt)                                 /* If there is snaking, 'adjacency' is redefined by the snaking-path */
                    ol[n] = (int)snakeperm[ol[n]];
            }
            inter_lspkr_position[0] = step[0];      /* Offset to right at start, so when algo starts to run by stepping to left, it's set back to initial position at 0 */
        }
    } else {
        if(orient[0] > 0) {
            for(n=0;n<chans;n+=2) {         /* EVEN lspkrs only */
                ochan_left[n] = n;
                ol[n] = ochan_left[n];
                ochan_right[n] = (n+out_lspkr_step) % chans;
                or[n] = ochan_right[n];
                if(dz->itemcnt)
                    or[n] = (int)snakeperm[or[n]];
            }
            inter_lspkr_position[0] = -step[0];
        } else {
            for(n=0;n<chans;n+=2) {
                ochan_right[n] = n;
                or[n] = ochan_right[n];
                ochan_left[n] = n - out_lspkr_step;
                if(ochan_left[n] < 0)
                    ochan_left[n] += chans;
                ol[n] = ochan_left[n];
                if(dz->itemcnt)
                    ol[n] = (int)snakeperm[ol[n]];
            }
            inter_lspkr_position[0] = step[0];
        }
        if(orient[1] > 0) {
            for(n=1;n<chans;n+=2) {         /* ODD lspkrs only */
                ochan_left[n] = n;
                ol[n] = ochan_left[n];
                ochan_right[n] = (n+out_lspkr_step) % chans;
                or[n] = ochan_right[n];
                if(dz->itemcnt)
                    or[n] = (int)snakeperm[or[n]];
            }
            inter_lspkr_position[1] = -step[1];
        } else {
            for(n=1;n<chans;n+=2) {
                ochan_right[n] = n;
                or[n] = ochan_right[n];
                ochan_left[n] =  n - out_lspkr_step;
                if(ochan_left[n] < 0)
                    ochan_left[n] += chans;
                ol[n] = ochan_left[n];
                if(dz->itemcnt)
                    ol[n] = (int)snakeperm[ol[n]];
            }
            inter_lspkr_position[1] = step[1];
        }
    }
    nextclick = click;      /* Establish next time at which to read any rotation brkpnt data */
    insampcnt = 0;
    bufpos = 0;
    if((exit_status = read_samps(ibuf,dz))<0)                       /* buflen is automatically a multipler of input channel count. */
        return(exit_status);
    memset((char *)obuf,0,dz->buflen * sizeof(float));      /* set obuf to zero, as values are ADDED into it */

    /* OUTER LOOP - PROCESS ENTIRE INPUT FILE TO OUTPUT */
    while(insampcnt < dz->insams[0]) {
        /* INNER LOOP - PROCESS FILE UP TO NEXT POTENTIAL ROTATION-BREAKPOINT READ */
        while(insampcnt < nextclick) {
            if(insampcnt >= dz->insams[0])
                break;
            inter_lspkr_position[0] += step[0];     /* Find next spatial location */

            /* IF inter-speaker position goes outside current lspkr pair, change to next loudpseaker pair, and readjust position to 0-1 range */

            if(dz->mode == 0) {
                if(inter_lspkr_position[0] < 0.0 || inter_lspkr_position[0] > 1.0) {
                    if(inter_lspkr_position[0] > 1.0) {
                        for(n=0;n<chans;n++) {
                            ochan_left[n] = ochan_right[n];
                            ol[n] = ochan_left[n];
                            ochan_right[n] = (ochan_right[n] + out_lspkr_step) % chans;
                            or[n] = ochan_right[n];
                        }
                        inter_lspkr_position[0] -= 1.0;
                    } else {
                        for(n=0;n<chans;n++) {
                            ochan_right[n] = ochan_left[n];
                            or[n] = ochan_right[n];
                            ochan_left[n] = ochan_left[n] - out_lspkr_step;
                            if(ochan_left[n] < 0)
                                ochan_left[n] += chans;
                            ol[n] = ochan_left[n];
                        }
                        inter_lspkr_position[0] += 1.0;
                    }
                    if(dz->itemcnt) { /* if snaking, redefine 'adjaceny' */
                        for(n=0;n<chans;n++) {
                            or[n] = (int)snakeperm[or[n]];
                            ol[n] = (int)snakeperm[ol[n]];
                        }
                    }
                }
            } else {
                inter_lspkr_position[1] += step[1];     /* Find next spatial location in 2nd rotation, too*/

                if(inter_lspkr_position[0] < 0.0 || inter_lspkr_position[0] > 1.0) {
                    if(inter_lspkr_position[0] > 1.0) {
                        for(n=0;n<chans;n+=2) {         /* EVEN lpskrs only, NB */
                            ochan_left[n] = ochan_right[n];
                            ol[n] = ochan_left[n];
                            ochan_right[n] = (ochan_right[n] + out_lspkr_step) % chans;
                            or[n] = ochan_right[n];
                        }
                        inter_lspkr_position[0] -= 1.0;
                    } else {
                        for(n=0;n<chans;n+=2) {
                            ochan_right[n] = ochan_left[n];
                            or[n] = ochan_right[n];
                            ochan_left[n] = ochan_left[n] - out_lspkr_step;
                            if(ochan_left[n] < 0)
                                ochan_left[n] += chans;
                            ol[n] = ochan_left[n];
                        }
                        inter_lspkr_position[0] += 1.0;
                    }
                    if(dz->itemcnt) { /* if snaking, redefine 'adjaceny' */
                        for(n=0;n<chans;n+=2) {
                            or[n] = (int)snakeperm[or[n]];
                            ol[n] = (int)snakeperm[ol[n]];
                        }
                    }
                }
                if(inter_lspkr_position[1] < 0.0 || inter_lspkr_position[1] > 1.0) {
                    if(inter_lspkr_position[1] > 1.0) {
                        for(n=1;n<chans;n+=2) {         /* ODD lpskrs only, NB */
                            ochan_left[n] = ochan_right[n];
                            ol[n] = ochan_left[n];
                            ochan_right[n] = (ochan_right[n] + out_lspkr_step) % chans;
                            or[n] = ochan_right[n];
                        }
                        inter_lspkr_position[1] -= 1.0;
                    } else {
                        for(n=1;n<chans;n+=2) {
                            ochan_right[n] = ochan_left[n];
                            or[n] = ochan_right[n];
                            ochan_left[n] = ochan_left[n] - out_lspkr_step;
                            if(ochan_left[n] < 0)
                                ochan_left[n] += chans;
                            ol[n] = ochan_left[n];
                        }
                        inter_lspkr_position[1] += 1.0;
                    }
                    if(dz->itemcnt) { /* if snaking, redefine 'adjaceny' */
                        for(n=1;n<chans;n+=2) {
                            or[n] = (int)snakeperm[or[n]];
                            ol[n] = (int)snakeperm[ol[n]];
                        }
                    }
                }
            }
            /* SET RELATIVE LEVELS ON (every) LOUDSPEAKER PAIR, FROM POSITION INFO */

            set_stereo_levels(inter_lspkr_position[0],&(llevel[0]),&(rlevel[0]));
            if(dz->mode == 1)
                set_stereo_levels(inter_lspkr_position[1],&(llevel[1]),&(rlevel[1]));

            /* CALCULATE THE OUTPUT SUMMED FROM EVERY INPUT CHAN */

            if(dz->mode == 0) {
                for(n=0;n<chans;n++) {
                    inhere = bufpos + n;            /* location of input sample is offset by 'n' to find the correct channel */
                    outhere = bufpos + ol[n];       /* location of output to related 'left' lspkr is offset similarly to correct channel */
                    lsig = llevel[0] * ibuf[inhere] * smearcompensate;
                    obuf[outhere] = (float)(obuf[outhere] + lsig);
                    outhere = bufpos + or[n];       /* location of output to related 'right' lspkr is offset similarly to correct channel */
                    rsig = rlevel[0] * ibuf[inhere] * smearcompensate;
                    obuf[outhere] = (float)(obuf[outhere] + rsig);
                    if(dz->param[SMEAR] > 0.0)
                        do_smear(ol[n],or[n],lsig,rsig,bufpos,chans,obuf,dz->param[SMEAR]);
                }
            } else {
                for(n=0;n<chans;n+=2) {         /* EVEN chans only */
                    inhere = bufpos + n;
                    outhere = bufpos + ol[n];
                    lsig = llevel[0] * ibuf[inhere] * smearcompensate;
                    obuf[outhere] = (float)(obuf[outhere] + lsig);
                    outhere = bufpos + or[n];
                    rsig = rlevel[0] * ibuf[inhere] * smearcompensate;
                    obuf[outhere] = (float)(obuf[outhere] + rsig);
                    if(dz->param[SMEAR] > 0.0)
                        do_smear(ol[n],or[n],lsig,rsig,bufpos,chans,obuf,dz->param[SMEAR]);
                }
                for(n=1;n<chans;n+=2) {         /* ODD chans only */
                    inhere = bufpos + n;
                    outhere = bufpos + ol[n];
                    lsig = llevel[1] * ibuf[inhere] * smearcompensate;
                    obuf[outhere] = (float)(obuf[outhere] + lsig);
                    outhere = bufpos + or[n];
                    rsig = rlevel[1] * ibuf[inhere] * smearcompensate;
                    obuf[outhere] = (float)(obuf[outhere] + rsig);
                    if(dz->param[SMEAR] > 0.0)
                        do_smear(ol[n],or[n],lsig,rsig,bufpos,chans,obuf,dz->param[SMEAR]);
                }
            }
            insampcnt += chans;                             /* step to next group-sample of input */
            bufpos += chans;
            /* once whole buffer is processed, write output, and read new input */
            if(bufpos >= dz->ssampsread) {
                if((exit_status = write_samps(obuf,dz->ssampsread,dz))<0)
                    return(exit_status);
                memset((char *)obuf,0,dz->buflen * sizeof(float));
                if((exit_status = read_samps(ibuf,dz))<0)
                    return(exit_status);
                if(dz->ssampsread == 0)
                    break;
                bufpos = 0;
            }

            /* IF MORE SNAKE DATA, IF IT'S TIME TO READ IT, READ IT */

            if(dz->next_snake_time && (insampcnt >= dz->next_snake_time))
                get_next_snake(dz);
        }

        /* ON REACHING NEXT POTENTIAL ROTATION-BRKPOINT, READ ROTATION-SPEED VALUE */

        time = (double)(insampcnt/chans)/srate;
        if((exit_status = read_values_from_all_existing_brktables(time,dz))<0)
            return(exit_status);
        step[0] = (dz->param[ROTATION0]/srate) * chans;
        if(dz->mode == 1)
            step[1] = (dz->param[ROTATION1]/srate) * chans;

        nextclick += click;             /* Set next (sample)time at which to read rotation-speed */
    }
    if(bufpos > 0) {
        if((exit_status = write_samps(obuf,bufpos,dz))<0)
            return(exit_status);
    }
    return(FINISHED);
}

/************************************************** GET_NEXT_SNAKE **************************************************/

void get_next_snake(dataptr dz)
{
    int entrylen = dz->infile->channels + 1;
    int k = dz->next_snake_loc + 1, n;
    for(n=0;n < dz->infile->channels;n++) {
        dz->lparray[FRAME_SNAKEPERM][n] = dz->lparray[FRAME_SNAKE][k];
        k++;
    }
    dz->next_snake_loc += entrylen;
    if(dz->next_snake_loc < dz->itemcnt)
        dz->next_snake_time = dz->lparray[FRAME_SNAKE][dz->next_snake_loc];     /* time(in samples) of start of next snake data */
    else
        dz->next_snake_time = 0;        /* flags, no more snakes */
}

/************************** GET_FIRST_ROTATION_ORIENTATION ********************************/

int get_first_rotation_orientation(int n,dataptr dz)
{
    int j;
    if(dz->brksize[n] == 0) {
        if(dz->param[n] == 0.0) /* no rotation */
            return 0;
        else if(dz->param[n] > 0.0)     /* clockwise rotation */
            return 1;
        return -1;                              /* anticlockwise rotation */
    }
    for(j=1;j<dz->brksize[n];j+=2) {
        if(dz->brk[n][j] > 0.0)         /* first rotation is clockwise */
            return 1;
        if(dz->brk[n][j] < 0.0)         /* first rotation is anticlockwise */
            return -1;
    }
    return 0;                                       /* no (non-zero) rotation found */
}

/************************** READ_THE_SPECIAL_DATA ********************************/

int read_the_special_data(char *filename,dataptr dz)
{
    int exit_status, entrylen=0, linecnt, ival;
    int n = 0, k, chans = dz->infile->channels;
    double time, lasttime, val;
    char temp[200], *p, *thisword, temp2[200];

    thisword = temp2;
    p = filename;
    if((sloom && *p == '@') || (!sloom && isdigit(*p))) {
        switch(dz->mode) {
        case(2):
            sprintf(errstr,"Data must be in a file\n");
            return(DATA_ERROR);
        case(6):
            if(sloom)
                p++;
            if((sscanf(p,"%d",&n)) < 1) {
                sprintf(errstr,"No such channel (%s) in the input file.\n",p);
                return(DATA_ERROR);
            }
            if((n < 1) || (n > dz->infile->channels)) {
                sprintf(errstr,"No such channel (%d) in the input file.\n",n);
                return(DATA_ERROR);
            }
            if((dz->lparray[0] = malloc(sizeof(int)))==NULL) {
                sprintf(errstr,"Insufficient memory to store chans-to-process info.\n");
                return(MEMORY_ERROR);
            }
            dz->lparray[0][0] = n - 1;              //      Convert to 0 to N-1 frame
            dz->itemcnt = 1;
            return FINISHED;
        default:
            dz->itemcnt = 0;                        /* flags 'no snake data' */
            dz->next_snake_time = 0;        /* flags 'no more snake data' */
            return FINISHED;
        }
    }
    if((dz->fp = fopen(filename,"r"))==NULL) {
        sprintf(errstr,"Cannot open datafile %s\n",filename);
        return(DATA_ERROR);
    }
    while(fgets(temp,200,dz->fp)!=NULL) {
        p = temp;
        if(is_an_empty_line_or_a_comment(p))
            continue;
        while(get_word_from_string(&p,&thisword))
            n++;
    }
    if(n==0) {
        sprintf(errstr,"No data in file %s\n",filename);
        return(DATA_ERROR);
    }
    dz->itemcnt = n;
    switch(dz->mode) {
    case(2):
        entrylen = chans;               // reorientation
        if(n != entrylen) {
            sprintf(errstr,"Reorient data in file %s is in incorrect format.\n",filename);
            return(DATA_ERROR);
        }
        if((dz->lparray[FRAME_SNAKE] = malloc(dz->itemcnt * sizeof(int)))==NULL) {
            sprintf(errstr,"Insufficient memory to store reorient data from file %s.\n",filename);
            return(MEMORY_ERROR);
        }
        break;
    case(0):
    case(1):
        entrylen = chans + 1;   // time-variable rotation-snake
        k = n % entrylen;
        if(k != 0) {
            sprintf(errstr,"Snake data in file %s is in incorrect format.\n",filename);
            return(DATA_ERROR);
        }
        if((dz->lparray[FRAME_SNAKE] = malloc(dz->itemcnt * sizeof(int)))==NULL) {
            sprintf(errstr,"Insufficient memory to store snaking data from file %s.\n",filename);
            return(MEMORY_ERROR);
        }
        break;
    case(6):
        if((dz->lparray[0] = malloc((dz->itemcnt + 4) * sizeof(int)))==NULL) {
            sprintf(errstr,"Insufficient memory to store edit-chans data in file %s.\n",filename);
            return(MEMORY_ERROR);
        }
        break;
    }

    if(fseek(dz->fp,0,0)<0) {
        sprintf(errstr,"fseek() failed in read_the_special_data()\n");
        return(SYSTEM_ERROR);
    }
    n = 0;
    linecnt = 1;
    lasttime = 0.0;
    while(fgets(temp,200,dz->fp)!=NULL) {
        p = temp;
        if(is_an_empty_line_or_a_comment(temp))
            continue;
        while(get_word_from_string(&p,&thisword)) {
            switch(dz->mode) {
            case(0):
            case(1):
                if(n % entrylen == 0) {
                    if(sscanf(thisword,"%lf",&time)!=1) {
                        sprintf(errstr,"Problem reading Time: line %d: file %s\n",linecnt,filename);
                        return(DATA_ERROR);
                    }
                    if(n == 0) {
                        if(time != 0.0) {
                            sprintf(errstr,"First time is not zero in file %s\n",filename);
                            return(DATA_ERROR);
                        }
                    } else {
                        if(time <= lasttime) {
                            sprintf(errstr,"Time does not advance at line %d in file %s\n",linecnt,filename);
                            return(DATA_ERROR);
                        }
                        /* TEST SNAKE VALIDITY in last set of 'chans' values */
                        if((exit_status = snake_test(n,lasttime,linecnt-1,filename,dz)) < 0)
                            return(exit_status);
                        lasttime = time;
                    }
                    dz->lparray[FRAME_SNAKE][n] = (int)round(time * dz->infile->srate) * chans;
                } else {
                    if(sscanf(thisword,"%lf",&val)!=1) {
                        sprintf(errstr,"Problem reading Value: line %d: file %s\n",linecnt,filename);
                        return(DATA_ERROR);
                    }
                    ival = (int)round(val);
                    if(ival < 1 || ival > chans) {
                        sprintf(errstr,"Invalid channel number (%d) in file %s : line %d\n",ival,filename,linecnt);
                        return(DATA_ERROR);
                    }
                    ival--;
                    dz->lparray[FRAME_SNAKE][n] = ival;
                }
                break;
            case(2):
                if(sscanf(thisword,"%lf",&val)!=1) {
                    sprintf(errstr,"Problem reading Value: file %s\n",filename);
                    return(DATA_ERROR);
                }
                ival = (int)round(val);
                if(ival < 1 || ival > chans) {
                    sprintf(errstr,"Invalid channel number (%d) in file %s\n",ival,filename);
                    return(DATA_ERROR);
                }
                ival--;
                dz->lparray[FRAME_SNAKE][n] = ival;
                break;
            case(6):
                if(sscanf(thisword,"%lf",&val)!=1) {
                    sprintf(errstr,"Problem reading Value: file %s\n",filename);
                    return(DATA_ERROR);
                }
                ival = (int)round(val);
                if(ival < 1 || ival > chans) {
                    sprintf(errstr,"Invalid channel number (%d) in file %s\n",ival,filename);
                    return(DATA_ERROR);
                }
                ival--;
                dz->lparray[0][n] = ival;
                break;
            }
            n++;
        }
        linecnt++;
    }
    if(fclose(dz->fp)<0) {
        fprintf(stdout,"WARNING: Failed to close input textfile %s.\n",filename);
        fflush(stdout);
    }
    switch(dz->mode) {
    case(2):
        if((exit_status = reorient_test(dz)) < 0)       /* Test reorientation entries */
            return(exit_status);
        break;
    case(6):
        if((exit_status = editchans_test(dz)) < 0)      /* Test edit-chans entries */
            return(exit_status);
        break;
    default:
        if((exit_status = snake_test(n,lasttime,linecnt-1,filename,dz)) < 0)    /* Test final set of snake entries */
            return(exit_status);
        break;
    }
    return(FINISHED);
}

/************************************************ SNAKE_TEST *****************************************/

int snake_test(int n,double lasttime,int linecnt,char *filename,dataptr dz)
{
    int m, j, k;
    int chans = dz->infile->channels;
    m = n - chans;
    for(k = m; k < n-1; k++) {
        for(j = k + 1; j < n; j++) {
            if(dz->lparray[FRAME_SNAKE][k] == dz->lparray[FRAME_SNAKE][j]) {
                sprintf(errstr,"Invalid snake sequence: file %s time %lf line %d: (channel %d repeated)\n",filename,lasttime,linecnt,dz->lparray[FRAME_SNAKE][k]);
                return(DATA_ERROR);
            }
        }
    }
    return(FINISHED);
}

/************************************************ SET_STEREO_LEVELS *****************************************/

void set_stereo_levels(double pos, double *llevel, double *rlevel)
{
    double relpos, temp, holecompensate;
    double zerocentredposition = (pos * 2.0) - 1.0; /* range  -1 to 1 */
    if(zerocentredposition < 0)
        relpos = -zerocentredposition;                          /* range   0 to 1 : position relative to centre of stereo */
    else
        relpos = zerocentredposition;
    temp = 1.0 + (relpos * relpos);                                 /* calculate hole in middle compensation */
    holecompensate = ROOT2 / sqrt(temp);
    *rlevel = pos * holecompensate;
    *llevel = (1.0 - pos) * holecompensate;
}

/************************************************ DO_SMEAR *****************************************/

void do_smear(int loutchan,int routchan,double lsig,double rsig,int bufpos,int chans,float *obuf,double smear)
{
    int smearleft,  smearright;
    // smear left output chan to its own left and right
    if((smearleft = loutchan - 1) < 0)
        smearleft += chans;
    if((smearright = loutchan + 1) >= chans)
        smearright -= chans;
    smearleft  += bufpos;
    smearright += bufpos;
    obuf[smearleft]  = (float)(obuf[smearleft]  + (lsig * smear));
    obuf[smearright] = (float)(obuf[smearright] + (lsig * smear));

    // smear right output chan to its own left and right
    if((smearleft = routchan - 1) < 0)
        smearleft += chans;
    smearleft += bufpos;
    if((smearright = routchan + 1) >= chans)
        smearright -= chans;
    smearright += bufpos;
    obuf[smearleft]  = (float)(obuf[smearleft]  + (rsig * smear));
    obuf[smearright] = (float)(obuf[smearright] + (rsig * smear));
}

/************************************************ REORIENT *****************************************/

int reorient(dataptr dz)
{
    int exit_status, chans = dz->infile->channels;
    float *ibuf = dz->sampbuf[0];
    float *obuf = dz->sampbuf[1];
    int *ochan = dz->lparray[FRAME_SNAKE];
    int n, m;
    while(dz->samps_left) {
        if((exit_status = read_samps(ibuf,dz))<0)
            return(exit_status);
        for(n=0;n < dz->ssampsread;n+=chans) {
            for(m=0;m <chans;m++)
                obuf[ochan[m]+n] = ibuf[m+n];
        }
        if((exit_status = write_samps(obuf,dz->ssampsread,dz))<0)
            return(exit_status);
    }
    return(FINISHED);
}

/************************************************ REORIENT_TEST *****************************************/

int reorient_test(dataptr dz)
{
    int chans = dz->infile->channels;
    int *ochan = dz->lparray[FRAME_SNAKE];
    int n, m;
    for(n=0;n<chans-1;n++) {
        if(ochan[n] >= chans) {
            sprintf(errstr,"Invalid Channel (%d) in reorientation data\n",ochan[n]+1);
            return(DATA_ERROR);
        }
        for(m=n+1;m<chans;m++) {
            if(ochan[n] == ochan[m]) {
                sprintf(errstr,"Duplicated Channel (%d) in reorientation data\n",ochan[n]+1);
                return(DATA_ERROR);
            }
        }
    }
    if(ochan[n] >= chans) {
        sprintf(errstr,"Invalid Channel (%d) in reorientation data\n",ochan[n]+1);
        return(DATA_ERROR);
    }
    return FINISHED;
}

/************************************************ EDITCHANS_TEST *****************************************/

int editchans_test(dataptr dz)
{
    int *echan = dz->lparray[0];
    int n, m;
    for(n=0;n<dz->itemcnt-1;n++) {
        for(m=n+1;m<dz->itemcnt;m++) {
            if(echan[n] == echan[m]) {
                sprintf(errstr,"repeated channel (%d) in channel edit data\n",echan[n]+1);
                return(DATA_ERROR);
            }
        }
    }
    return FINISHED;
}

/************************************ CHECK_THE_PARAM_VALIDITY_AND_CONSISTENCY ****************************/

int check_the_param_validity_and_consistency(dataptr dz)
{
    int exit_status, k;
    double frac;
    switch(dz->mode) {
    case(3):
        k = (int)floor(dz->param[0]);
        if(k > dz->infile->channels) {
            sprintf(errstr,"Mirrorplane (%.1lf) not compatible with channel count (%d)\n",dz->param[0],dz->infile->channels);
            return(DATA_ERROR);
        }
        if(k != dz->param[0]) {
            frac = dz->param[0] - (double)k;
            if(!flteq(frac,0.5)) {
                sprintf(errstr,"Mirrorplane value must an be integers or a half-integer (e.g. 1.5, 3.5)\n");
                return(DATA_ERROR);
            }
        }
        if((exit_status = mirror(dz))<0)
            return(exit_status);
        break;
    case(4):
        if((exit_status = bilateral(dz))<0)
            return(exit_status);
        break;
    case(7):
        if((exit_status = beast_bilateral(dz))<0)
            return(exit_status);
        break;
    case(5):
        if(dz->iparam[0] > dz->infile->channels) {
            sprintf(errstr,"Channel %d does not exist in input file.\n",dz->iparam[0]);
            return(DATA_ERROR);
        }
        if(dz->iparam[1] > dz->infile->channels) {
            sprintf(errstr,"Channel %d does not exist in input file.\n",dz->iparam[1]);
            return(DATA_ERROR);
        }
        if(dz->iparam[0] == dz->iparam[1]) {
            sprintf(errstr,"Can't swap channel %d with itself\n",dz->iparam[0]);
            return(DATA_ERROR);
        }
        dz->iparam[0]--;                // Change to 0 to N-1 frame
        dz->iparam[1]--;
        break;
    }
    return FINISHED;
}

/************************************ MIRROR ****************************/

int mirror(dataptr dz)
{
    int mirrorplane, outchans = dz->infile->channels, ichan, ochan, lastchan, n;
    int *mirrormap;
    if((dz->lparray[FRAME_SNAKE] = malloc(outchans * sizeof(int)))==NULL) {
        sprintf(errstr,"Insufficient memory to store mirroring data.\n");
        return(MEMORY_ERROR);
    }
    mirrormap = dz->lparray[FRAME_SNAKE];
    mirrorplane = (int)round(dz->param[0] * 2.0);   //      2.0  maps to 4  2.5 maps to 5
    if(EVEN(mirrorplane))
        mirrorplane = (int)round(dz->param[0]);         // 2.0 maps to 2
    else
        mirrorplane = -(mirrorplane/2);                         //      5 (2.5) maps to -2 : 7 (3.5) to -3 etc.
    if(mirrorplane > 0) {                   //      mirror centred in lspkr
        mirrorplane--;                          //      lspkrs are numbered 0 to (N-1)
        for(n=0; n < outchans; n++) {                   // if mirrorplane is at zero
            ichan = mirrorplane + n;                        //       0       1       2       3       4       5       6       7              OR              0       1        2       3       4       5       6
            while(ichan >= outchans)
                ichan -= outchans;                              //      (even chancnt) GOES TO                                          (odd chancnt) GOES TO
            ochan = mirrorplane - n;
            while(ochan < 0)                                        //       0  -1  -2      -3      -4      -5      -6      -7                              0  -1   -2      -3      -4      -5      -6
                ochan += outchans;                              // = 0   7       6       5       4       3       2       1                        = 0   6        5       4       3       2       1
            mirrormap[ichan] = ochan;
        }
    } else {                                                //      mirror centred between lspkrs
        mirrorplane = -mirrorplane;                             //      -2 to 2 etc. mirror is between 2 & 3 of internal numbering (0 to (N-1))
        mirrorplane--;                          //      lspkrs are numbered 0 to (N-1)
        // if mirrorplane is at 0.5, (mirrorplane value here 0)
        if(EVEN(outchans)) {                                    // originally 1.5: ABOVE: doubled = 3 : to -(N/2)= -1: HERE to -N = 1: to decr = 0)
            for(n=1; n <= outchans; n++) {          //       1       2       3       4       5       6       7       8
                ichan = mirrorplane + n;                // = 1   2       3       4       5       6       7       0
                while(ichan >= outchans)
                    ichan -= outchans;                      //      (even chancnt) GOES TO
                ochan = mirrorplane - n + 1;
                while(ochan < 0)                                //       0  -1  -2      -3      -4      -5      -6      -7
                    ochan += outchans;                      // = 0   7       6       5       4       3       2       1
                mirrormap[ichan] = ochan;
            }
        } else {
            lastchan = outchans/2;                          //      for 7, lastchan = 3
            lastchan++;                                                     //      for 7, lastchan = 4
            for(n=1; n <= lastchan; n++) {          // if mirrorplane is at 0.5
                ichan = mirrorplane + n;                //   1   2       3       4
                while(ichan >= outchans)
                    ichan -= outchans;                      //      (odd chancnt) GOES TO
                ochan = mirrorplane - n + 1;
                while(ochan < 0)                                //   0  -1  -2  -3
                    ochan += outchans;                      //  =0   6       5       4
                mirrormap[ichan] = ochan;
                mirrormap[ochan] = ichan;               //      and vice versa
            }
        }
    }
    return(FINISHED);
}

/************************************ BILATERAL ************************/

int bilateral(dataptr dz)
{
    int outchans = dz->infile->channels, ichan, ochan, split;
    int *bi;
    int toring = dz->vflag[0];
    if((dz->lparray[FRAME_SNAKE] = malloc(outchans * sizeof(int)))==NULL) {
        sprintf(errstr,"Insufficient memory to store bilateralisation data.\n");
        return(MEMORY_ERROR);
    }
    bi = dz->lparray[FRAME_SNAKE];
    split = (int)ceil((double)outchans/2.0);        //      8 --> 4         7 --> 4
    ichan = outchans - 1;
    ochan = 1;
    while(ichan >= split) {                                         //      with 8 (even no) chans                  with 7 (odd no) chans
        if(toring)                                                              //      7       6       5       4                       OR              6       5       4
            bi[ochan] = ichan;                                      //      GOES TO                                                 GOES TO
        else                                                                    //      1       3       5       7                                       1       3       5
            bi[ichan] = ochan;
        ichan--;
        ochan += 2;
    }
    while (ichan >= 0) {                                            //      with 8 (even no) chans                  with 7 (odd no) chans
        if(toring)                                                              //      3       2       1       0                       OR              3       2       1       0
            bi[ichan * 2] = ichan;                          //      GOES TO                                                 GOES TO
        else                                                                    //      6       4       2       0                                       6       4       2       0
            bi[ichan] = ichan * 2;
        ichan--;
    }
    return(FINISHED);                                                       //         0                      0                                0                      0
}                                                                                               //       7       1                      1       2                        6       1                      1       2
                                                                                                //      6         2       TO   3         4                      5         2       TO   3         4
                                                                                                //       5       3                      5       6                        4       3                      5       6
                                                                                                //         4                      7

/************************************ BEAST_BILATERAL ************************/

int beast_bilateral(dataptr dz)
{
    int outchans = dz->infile->channels, ichan, ochan;
    int *bi;
    int toring = dz->vflag[0], even, lastevenchanno, lastoddchanno = 0, limit;
    if((dz->lparray[FRAME_SNAKE] = malloc(outchans * sizeof(int)))==NULL) {
        sprintf(errstr,"Insufficient memory to store bilateralisation data.\n");
        return(MEMORY_ERROR);
    }
    bi = dz->lparray[FRAME_SNAKE];
    even = 1;
    if((outchans/2) * 2 != outchans) {
        even = 0;
        lastevenchanno = outchans - 1;                  // 6 for 7channel file
    } else {
        lastevenchanno = outchans - 2;                  // 6 for 8channel file
        lastoddchanno  = outchans - 1;                  // 7 for 8channel file
    }
    if(toring)
        bi[lastevenchanno] = 0;
    else
        bi[0] = lastevenchanno;                                         //      0(1) -->6(7)
    if(even) {
        if(toring)
            bi[lastoddchanno] = outchans/2;
        else
            bi[outchans/2] = lastoddchanno;                 //      4(5) -->7(8)    if even number of chans
    }
    limit = outchans/2;                                             // for 8 chans, up to 4
    if(!even)
        limit++;                                                        // for 7 chans, up to 4
    ichan = 1;
    while(ichan < limit) {
        if(toring)
            bi[(ichan * 2) - 1] = ichan;
        else
            bi[ichan] = (ichan * 2) - 1;    //      1->1 2->3 3->5 (= 2->2 3->4 4->6)
        ichan++;
    }
    ochan = 0;
    ichan = outchans - 1;                                   //      for 8chans 7, for 7chans 6
    limit = outchans/2;                                             // for 8 chans, down to >4, for 7 chans, down to >3
    while(ichan > limit) {
        if(toring)
            bi[ochan] = ichan;
        else
            bi[ichan] = ochan;                              //      7->0 6->2 5->4 (= 8->1 7->3 6->5)
        ichan--;
        ochan += 2;
    }
    return(FINISHED);                                                       //         0                      6                                0                      6
}                                                                                               //       7       1                      0       1                        6       1                      0       1
                                                                                                //      6         2       TO   2         3                      5         2       TO   2         3
                                                                                                //       5       3                      4       5                        4       3                      4       5
                                                                                                //         4                      7

/************************************ SWAPCHAN ************************/

int swapchans(dataptr dz)
{
    int exit_status;
    float *buf = dz->sampbuf[0], temp;
    int n;
    int ochans = dz->infile->channels;
    int thischan = dz->iparam[0], thatchan = dz->iparam[1];

    if((exit_status = read_samps(buf,dz))<0)
        return(exit_status);
    if(dz->ssampsread == 0) {
        sprintf(errstr,"No data in input soundfile\n");
        return(DATA_ERROR);
    }
    while(dz->ssampsread > 0) {
        for(n=0;n<dz->ssampsread;n+=ochans) {
            temp = buf[n + thischan];
            buf[n + thischan] = buf[n + thatchan];
            buf[n + thatchan] = temp;
        }
        if((exit_status = write_samps(buf,dz->ssampsread,dz))<0)
            return(exit_status);
        if((exit_status = read_samps(buf,dz))<0)
            return(exit_status);
    }
    return FINISHED;
}

/************************************ ENVCHANS ************************/

int envchans(dataptr dz)
{
    int exit_status;
    float *buf = dz->sampbuf[0];
    int n;
    int ochans = dz->infile->channels, k, thisochan;
    int *chaninfo = dz->lparray[0], chunksamptime;
    double thisgain, nextgain=0, gainstep, timestep, gainincr;
    int thistime, nexttime;
    int thisbrk = 0, nextbrk = 2;
    double *gainvals = NULL;

    if(dz->brksize[0]) {
        gainvals = dz->brk[0];
        thistime = (int)round(gainvals[thisbrk] * (double)dz->infile->srate);
        if(thistime > 0.0) {
            nexttime = (int)round(gainvals[nextbrk] * (double)dz->infile->srate);
            thisgain = gainvals[thisbrk+1];
            nextgain = thisgain;            //      If before start of brktable, set gain to first val in table
            gainincr = 0.0;                         //      and gain-increment to 0
        } else {
            nexttime = (int)round(gainvals[nextbrk] * (double)dz->infile->srate);
            thisgain = gainvals[thisbrk+1];
            nextgain = gainvals[nextbrk+1];
            gainstep = nextgain - thisgain;
            timestep = nexttime - thistime;
            gainincr = gainstep/(double)timestep;
            thisbrk += 2;
            nextbrk += 2;
        }
    } else {
        thisgain = dz->param[0];
        gainincr = 0.0;
        nexttime = dz->insams[0] + 2;           //      i.e. larger than chunksamptime counter can reach
    }
    if((exit_status = read_samps(buf,dz))<0)
        return(exit_status);
    if(dz->ssampsread == 0) {
        sprintf(errstr,"No data in input soundfile\n");
        return(DATA_ERROR);
    }
    chunksamptime = 0;
    while(dz->ssampsread > 0) {
        for(n=0;n<dz->ssampsread;n+=ochans,chunksamptime++) {
            if(chunksamptime >= nexttime) {
                if(nextbrk < dz->brksize[0] * 2) {
                    thistime = nexttime;
                    thisgain = nextgain;
                    nexttime = (int)round(gainvals[nextbrk] * (double)dz->infile->srate);
                    nextgain = gainvals[nextbrk+1];
                    gainstep = nextgain - thisgain;
                    timestep = nexttime - thistime;
                    gainincr = gainstep/(double)timestep;
                    thisbrk += 2;
                    nextbrk += 2;
                } else
                    gainincr = 0.0;         //      If run off end of brktable, keep  gain steady
            }
            for(k = 0; k < dz->itemcnt;k++) {
                thisochan = chaninfo[k];
                buf[n + thisochan] = (float)(buf[n + thisochan] * thisgain);
            }
            thisgain += gainincr;
            if(gainincr > 0.0)                              //      Avoid rounding errors
                thisgain = min(thisgain,nextgain);
            else if(gainincr < 0.0)
                thisgain = max(thisgain,nextgain);
        }
        if((exit_status = write_samps(buf,dz->ssampsread,dz))<0)
            return(exit_status);
        if((exit_status = read_samps(buf,dz))<0)
            return(exit_status);
    }
    return FINISHED;
}
