/*
 * 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>
#include <limits.h>
#include <flags.h>
#include <extdcon.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_mchiter_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_mchiter_param_ranges_and_defaults(dataptr dz);
static int handle_the_outfile(int *cmdlinecnt,char ***cmdline,dataptr dz);
static int open_the_outfile(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  read_the_input_snd(dataptr dz);
static void scale_input(dataptr dz);
static int get_next_writestart(int write_start,dataptr dz);

static int iterate(int cnt,int pass,double *gain,double *pshift,
                   int write_end,int local_write_start,int inmsampsize,double level,double *maxsamp,int pstep,int iterating,int thischan,dataptr dz);
static int iter(int cnt,int passno, double *gain,int local_write_start,int inmsampsize,double level,double *maxsamp,int iterating,int thischan,dataptr dz);
static int iter_shift_interp(int cnt,int passno, double *gain,double *pshift,int local_write_start,int inmsampsize,double level,double *maxsamp,
                             int pstep,int iterating,int thischan,dataptr dz);
static int fixa_iter(int cnt,int passno,double *gain,int local_write_start,int inmsampsize,double level,double *maxsamp,int iterating,int thischan,dataptr dz);
static int fixa_iter_shift_interp(int cnt,int passno,double *gain,double *pshift,int local_write_start,int inmsampsize,double level,
                                  double *maxsamp,int pstep,int iterating,int thischan,dataptr dz);
static double get_gain(dataptr dz);
static double get_pshift(dataptr dz);
static int get_maxvalue_of_rand(double *maxrand,dataptr dz);
static int get_maxvalue_of_pscat(double *maxpscat,dataptr dz);
static int get_minvalue_of_delay(double *mindelay,dataptr dz);
static void set_default_gain(int mindelay_samps,dataptr dz);
static void set_default_delays(dataptr dz);
static void reverse_fadevals(dataptr dz);
static void setup_iter_process_type(int is_unity_gain,dataptr dz);

static int create_mchiterbufs(double maxpscat,dataptr dz);

static void shuflupch(int k,int outchans,dataptr dz);
static void prefixch(int n,int outchans,dataptr dz);
static void insertch(int n,int t,int outchans,dataptr dz);
static void permute_chans(int outchans,dataptr dz);

static int mi_setup_internal_arrays_and_array_pointers(dataptr dz);
static int do_iteration(dataptr dz);

/**************************************** 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);
        }
    }
    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--;
        dz->maxmode = 2;
        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_mchiter_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;

    // 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_mchiter_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
    //      handle_special_data()           redundant

    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()  redundant
    is_launched = TRUE;
    dz->bufcnt = 3;
    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 = open_the_outfile(dz))<0) {
        print_messages_and_close_sndfiles(exit_status,is_launched,dz);
        return(FAILED);
    }
    //param_preprocess  .... includes ... create_sndbufs
    if((exit_status = iterate_preprocess(dz))<0) {
        print_messages_and_close_sndfiles(exit_status,is_launched,dz);
        return(FAILED);
    }
    //spec_process_file =
    if((exit_status = do_iteration(dz))<0) {
        print_messages_and_close_sndfiles(exit_status,is_launched,dz);
        return(FAILED);
    }
    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 = mi_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)
{
    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);
    (*cmdline)++;
    (*cmdlinecnt)--;
    return(FINISHED);
}

/************************ OPEN_THE_OUTFILE *********************/

int open_the_outfile(dataptr dz)
{
    int exit_status;
    dz->infile->channels = dz->iparam[MITER_OCHANS];
    if((exit_status = create_sized_outfile(dz->outfilename,dz))<0)
        return(exit_status);
    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_MCHITER_APPLICATION *******************/

int setup_mchiter_application(dataptr dz)
{
    int exit_status;
    aplptr ap;
    if((exit_status = establish_application(dz))<0)         // GLOBAL
        return(FAILED);
    ap = dz->application;
    switch(dz->mode) {
    case(0):
        if((exit_status = set_param_data(ap,0,2,2,"id"))<0)
            return(FAILED);
        break;
    case(1):
        if((exit_status = set_param_data(ap,0,2,2,"ii"))<0)
            return(FAILED);
        break;
    }
    if((exit_status = set_vflgs(ap,"",0,"","drpafgs" ,7,7,"DDDDDdi"))<0)
        return(FAILED);
    // set_legal_infile_structure -->
    dz->has_otherfile = FALSE;
    // assign_process_logic -->
    dz->input_data_type = SNDFILES_ONLY;
    dz->process_type        = UNEQUAL_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 != 1)  {
            sprintf(errstr,"File %s is not of correct type (must be mono)\n",cmdline[0]);
            return(DATA_ERROR);
        } else 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_MCHITER_PARAM_RANGES_AND_DEFAULTS *******************/

int setup_mchiter_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()

    ap->lo[MITER_OCHANS]  = 2;
    ap->hi[MITER_OCHANS]  = 16;
    ap->default_val[MITER_OCHANS] = 8;
    switch(dz->mode) {
    case(0):
        ap->lo[MITER_DUR] = dz->duration;
        ap->hi[MITER_DUR] = BIG_TIME;
        ap->default_val[MITER_DUR] = dz->duration * 2.0;
        break;
    case(1):
        ap->lo[MITER_REPEATS]   = 1.0;
        ap->hi[MITER_REPEATS]   = BIG_VALUE;
        ap->default_val[MITER_REPEATS] = 2.0;
        break;
    }
    ap->lo[MITER_DELAY]     = FLTERR;
    ap->hi[MITER_DELAY]     = ITER_MAX_DELAY;
    ap->default_val[MITER_DELAY]= dz->duration;
    ap->lo[MITER_RANDOM]= 0.0;
    ap->hi[MITER_RANDOM]= 1.0;
    ap->default_val[MITER_RANDOM]= 0.0;
    ap->lo[MITER_PSCAT]     = 0.0;
    ap->hi[MITER_PSCAT]     = ITER_MAXPSHIFT;
    ap->default_val[MITER_PSCAT] = 0.0;
    ap->lo[MITER_ASCAT]     = 0.0;
    ap->hi[MITER_ASCAT]     = 1.0;
    ap->default_val[MITER_ASCAT] = 0.0;
    ap->lo[MITER_FADE]      = 0.0;
    ap->hi[MITER_FADE]      = 1.0;
    ap->default_val[MITER_FADE]  = 0.0;
    ap->lo[MITER_GAIN]      = 0.0;
    ap->hi[MITER_GAIN]      = 1.0;
    ap->default_val[MITER_GAIN]  = 1.0; /* 0.0 */
    ap->lo[MITER_RSEED]     = 0.0;
    ap->hi[MITER_RSEED]     = MAXSHORT;
    ap->default_val[MITER_RSEED] = 0.0;
    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_mchiter_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);
}



/************************* 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 setup_internal_arrays_and_array_pointers(dataptr dz)
{
    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("iter");
    return(USAGE_ONLY);
}

/******************************** DBTOLEVEL ***********************/

double dbtolevel(double val)
{
    int isneg = 0;
    if(flteq(val,0.0))
        return(1.0);
    if(val < 0.0) {
        val = -val;
        isneg = 1;
    }
    val /= 20.0;
    val = pow(10.0,val);
    if(isneg)
        val = 1.0/val;
    return(val);
}

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

int get_the_process_no(char *prog_identifier_from_cmdline,dataptr dz)
{
    if(!strcmp(prog_identifier_from_cmdline,"iter"))                                dz->process = MCHITER;
    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);
}

/****************************** DO_ITERATION *************************
 *
 * (1) First event is always copy of original.
 */

//TW COMPLETELY UPDATED FUNCTION : (flt-converted)
#define ACCEPTABLE_LEVEL 0.75

int do_iteration(dataptr dz)
{
    int    exit_status, iterating;
    int   write_end, tail, cnt, arraysize = BIGARRAY;
    float *tailend;
    int    bufs_written, finished;
    double level, thistime;
    int   out_sampdur = 0, inmsampsize;
    int   write_start, local_write_start;
    double one_over_sr = 1.0/(double)dz->infile->srate, maxsamp = 0.0;
    int    passno, is_penult = 0, pstep;
    int   k;
    double *gain, *pshift, gaingain = -1.0;
    int   *wstart;
    char   *permstore;
    int permstorecnt = 0;
    float   *orig_inbuf = dz->sampbuf[0];
    int permno = 0,  thischan, endchan;
    int outchans = dz->iparam[MITER_OCHANS], *perm = dz->iparray[0];
    permute_chans(outchans,dz);
    thischan = perm[permno];

    pstep = MITER_STEP;
    iterating = 1;
    if ((gain = (double *)malloc(arraysize * sizeof(double)))==NULL) {
        sprintf(errstr,"Insufficient memory to store gain values\n");
        return(MEMORY_ERROR);
    }
    if ((pshift = (double *)malloc(arraysize * sizeof(double)))==NULL) {
        sprintf(errstr,"Insufficient memory to store pitch shift values\n");
        return(MEMORY_ERROR);
    }
    if ((wstart = (int *)malloc(arraysize * sizeof(int)))==NULL) {
        sprintf(errstr,"Insufficient memory to store pitch shift values\n");
        return(MEMORY_ERROR);
    }
    if ((permstore = (char *)malloc(arraysize * outchans * sizeof(char)))==NULL) {
        sprintf(errstr,"Insufficient memory to store pitch shift values\n");
        return(MEMORY_ERROR);
    }
    for(k=0;k<outchans;k++)
        permstore[permstorecnt++] = (char)(perm[k]);

    if(dz->mode==ITERATE_DUR)
        out_sampdur  = round(dz->param[MITER_DUR] * (double)dz->infile->srate);
    if(sloom) {
        switch(dz->mode) {
        case(ITERATE_DUR):
            dz->tempsize = out_sampdur;
            break;
        case(ITERATE_REPEATS):
            dz->tempsize = dz->insams[0] * (dz->iparam[MITER_REPEATS]+1);   /* approx */
            break;
        }
    }
    for(passno=0;passno<2;passno++) {
        if(passno > 0) {
            permno = 0;
            thischan = permstore[permno];
        }
        is_penult = 0;
        cnt = 0;
        bufs_written = 0;
        write_start = 0;
        maxsamp = 0.0;
        memset((char *)dz->sampbuf[1],0,dz->buflen * outchans * sizeof(float));
        level = dz->param[MITER_FADE];
        sndseekEx(dz->ifd[0],0L,0);
        display_virtual_time(0L,dz);
        fflush(stdout);
        dz->sampbuf[0] = orig_inbuf;
        if(passno > 0) {
            print_outmessage_flush("Second pass, level adjusted\n");
            dz->tempsize = dz->total_samps_written/outchans;
            dz->total_samps_written = 0;
            memset((char *)dz->sampbuf[0],0,(dz->sampbuf[3] - dz->sampbuf[0]) * sizeof(float));
        }
        if((exit_status = read_the_input_snd(dz))<0)
            return(exit_status);
        if(dz->iparam[MITER_DO_SCALE])
            scale_input(dz);
        inmsampsize = dz->insams[0];
        /* 1 */
        local_write_start = 0;
        switch(dz->iparam[MITER_PROCESS]) {
        case(MONO):
            iter(0,passno,gain,local_write_start,inmsampsize,level,&maxsamp,iterating,thischan,dz);
            break;
        case(MN_INTP_SHIFT):
            iter_shift_interp(0,passno,gain,pshift,local_write_start,inmsampsize,level,&maxsamp,pstep,iterating,thischan,dz);
            break;
        case(FIXA_MONO):
            fixa_iter(0,passno,gain,local_write_start,inmsampsize,level,&maxsamp,iterating,thischan,dz);
            break;
        case(FIXA_MN_INTP_SHIFT):
            fixa_iter_shift_interp(0,passno,gain,pshift,local_write_start,inmsampsize,level,&maxsamp,pstep,iterating,thischan,dz);
            break;
        }
        permno++;
        if(passno == 0)
            thischan = perm[permno];
        else
            thischan = permstore[permno];
        write_end   = dz->insams[0];
        thistime = 0.0;
        if((exit_status = read_values_from_all_existing_brktables(thistime,dz))<0)
            return(exit_status);
        if(dz->brksize[MITER_DELAY])
            dz->iparam[MITER_MSAMPDEL] = round(dz->param[MITER_DELAY] * (double)dz->infile->srate);
        if(passno==0)
            wstart[cnt] = get_next_writestart(write_start,dz);
        write_start = wstart[cnt];
        local_write_start = write_start;
        finished = FALSE;
        for(;;) {
            switch(dz->mode) {
            case(ITERATE_DUR):
                if(write_start >= out_sampdur)
                    finished = TRUE;
                break;
            case(ITERATE_REPEATS):
                if(cnt >= dz->iparam[MITER_REPEATS])
                    finished = TRUE;
                break;
            }
            if(finished)
                break;
            while(local_write_start >= dz->buflen) {
                if(passno > 0) {
                    if((exit_status = write_samps(dz->sampbuf[1],dz->buflen * outchans,dz))<0)
                        return(exit_status);
                }
                bufs_written++;
                tail = write_end - dz->buflen;
                memset((char *)dz->sampbuf[1],0,dz->buflen * outchans * sizeof(float));
                if(tail > 0) {
                    memmove((char *)dz->sampbuf[1],(char *)dz->sampbuf[2],tail * outchans * sizeof(float));
                    tailend = dz->sampbuf[1] + (tail * outchans);
                } else
                    tailend = dz->sampbuf[2]; // dz->sampbuf[2] must be set to something big enough to accomodate multichan out
                memset((char *)tailend,0,(dz->sampbuf[3] - tailend) * sizeof(float)); // dz->sampbuf[3] simil
                local_write_start -= dz->buflen;
                write_end         -= dz->buflen;
            }
            cnt++;
            if((passno == 0) && (cnt >= arraysize)) {
                arraysize += BIGARRAY;
                if ((gain = (double *)realloc((char *)gain,arraysize * sizeof(double)))==NULL) {
                    sprintf(errstr,"Insufficient memory to store gain values (2)\n");
                    return(MEMORY_ERROR);
                }
                if ((pshift = (double *)realloc((char *)pshift,arraysize * sizeof(double)))==NULL) {
                    sprintf(errstr,"Insufficient memory to store pshift values (2)\n");
                    return(MEMORY_ERROR);
                }
                if ((wstart = (int *)realloc((char *)wstart,arraysize * sizeof(int)))==NULL) {
                    sprintf(errstr,"Insufficient memory to store wstart values (2)\n");
                    return(MEMORY_ERROR);
                }
                if ((permstore = (char *)realloc((char *)wstart,arraysize * outchans * sizeof(char)))==NULL) {
                    sprintf(errstr,"Insufficient memory to store wstart values (2)\n");
                    return(MEMORY_ERROR);
                }
            }
            thistime = ((dz->buflen * bufs_written) + local_write_start) * one_over_sr;

            if((exit_status = read_values_from_all_existing_brktables(thistime,dz))<0)
                return(exit_status);
            if(is_penult) {
                dz->param[MITER_PSCAT] = 0.0;
                dz->param[MITER_ASCAT] = 0.0;
            }
            if(dz->brksize[MITER_DELAY])
                dz->iparam[MITER_MSAMPDEL] = round(dz->param[MITER_DELAY] * (double)dz->infile->srate);
            write_end = iterate(cnt,passno,gain,pshift,write_end,local_write_start,inmsampsize,level,&maxsamp,pstep,iterating,thischan,dz);
            permno++;
            if(passno == 0) {
                if(permno >= outchans) {
                    endchan = perm[permno-1];
                    do {
                        permute_chans(dz->iparam[MITER_OCHANS],dz);
                    } while(perm[0] == endchan);
                    permno = 0;
                    for(k=0;k<outchans;k++)
                        permstore[permstorecnt++] = (char)(perm[k]);
                }
            }
            if(passno == 0)
                thischan = perm[permno];
            else
                thischan = permstore[permno];
            level *= dz->param[MITER_FADE];
            if(passno==0)
                wstart[cnt] = get_next_writestart(write_start,dz);
            write_start = wstart[cnt];
            local_write_start = write_start - (bufs_written * dz->buflen);
        }
        if(passno > 0) {
            if(write_end > 0) {
                if((exit_status = write_samps(dz->sampbuf[1],write_end * outchans,dz))<0)
                    return(exit_status);
            }
        } else {
            if(maxsamp <= 0.0) {
                sprintf(errstr,"No significant signal level found");
                return(DATA_ERROR);
            }
            if(maxsamp < ACCEPTABLE_LEVEL || maxsamp > 0.99)
                gaingain = ACCEPTABLE_LEVEL/maxsamp;
            else
                /* **** Layout issue again **** */
                gaingain = 1.0;
            switch(dz->iparam[MITER_PROCESS]) {
            case(MONO):
            case(MN_INTP_SHIFT):
                for(k=0;k<=cnt;k++)
                    gain[k] *= gaingain;
                break;
            case(FIXA_MONO):
            case(FIXA_MN_INTP_SHIFT):
                for(k=0;k<=cnt;k++)
                    gain[k] = gaingain;
                break;
            }
        }
    }
    return FINISHED;
}

/*************************** READ_THE_INPUT_SND **************************/

int read_the_input_snd(dataptr dz)
{
    int samps_read;
    if((samps_read = fgetfbufEx(dz->sampbuf[0], dz->insams[0],dz->ifd[0],0)) <= 0) {
        sprintf(errstr,"Can't read samps from input soundfile\n");
        if(samps_read<0)
            return(SYSTEM_ERROR);
        return(DATA_ERROR);
    }
    if(samps_read!=dz->insams[0]) {
        sprintf(errstr, "Failed to read all of source file. read_the_input_snd()\n");
        return(PROGRAM_ERROR);
    }
    if(dz->vflag[IS_ITER_PSCAT])
        dz->sampbuf[0][samps_read] = (float)0; /* GUARD POINT FOR INTERPOLATION */
    return(FINISHED);
}

/******************************* SCALE_INPUT ****************************/

void scale_input(dataptr dz)
{
    int n;
    int end = dz->insams[0];
    if(dz->iparam[MITER_PROCESS]!=FIXA_MONO && dz->iparam[MITER_PROCESS]!=FIXA_STEREO)
        end = dz->insams[0] + 1;        /* ALLOW FOR GUARD POINTS */
    for(n=0; n < end; n++)
        dz->sampbuf[0][n] = (float)(dz->sampbuf[0][n] * dz->param[MITER_GAIN]);
}

/*************************** GET_NEXT_WRITESTART ****************************/

int get_next_writestart(int write_start,dataptr dz)
{
    int this_step;
    double d;
    if(dz->vflag[IS_ITER_RAND]) {
        d = ((drand48() * 2.0) - 1.0) * dz->param[MITER_RANDOM];
        d += 1.0;
        this_step = (int)round((double)dz->iparam[MITER_MSAMPDEL] * d);
        write_start += this_step;
    } else
        write_start += dz->iparam[MITER_MSAMPDEL];
    return(write_start);
}

/******************************* ITERATE *****************************/

//TW COMPLETELY UPDATED FUNCTION : (flt-converted)
int iterate
(int cnt,int pass,double *gain,double *pshift,int write_end,int local_write_start,
 int inmsampsize,double level,double *maxsamp,int pstep,int iterating,int thischan,dataptr dz)
{
    int wr_end = 0;
    switch(dz->iparam[MITER_PROCESS]) {
    case(MONO):
        wr_end = iter(cnt,pass,gain,local_write_start,inmsampsize,level,maxsamp,iterating,thischan,dz);
        break;
    case(MN_INTP_SHIFT):
        wr_end = iter_shift_interp(cnt,pass,gain,pshift,local_write_start,inmsampsize,level,maxsamp,pstep,iterating,thischan,dz);
        break;
    case(FIXA_MONO):
        wr_end = fixa_iter(cnt,pass,gain,local_write_start,inmsampsize,level,maxsamp,iterating,thischan,dz);
        break;
    case(FIXA_MN_INTP_SHIFT):
        wr_end = fixa_iter_shift_interp(cnt,pass,gain,pshift,local_write_start,inmsampsize,level,maxsamp,pstep,iterating,thischan,dz);
        break;
    }
    return max(wr_end,write_end);
}

/**************************** ITER ***************************/

//TW COMPLETELY UPDATED FUNCTION : (flt-converted)
int iter(int cnt,int passno, double *gain,int local_write_start,int inmsampsize,double level,double *maxsamp,int iterating,int thischan,dataptr dz)
{
    int outchans = dz->iparam[MITER_OCHANS];
    register int i, j = (local_write_start * outchans) + thischan;
    float *outbuf = dz->sampbuf[1];
    float *inbuf  = dz->sampbuf[0];
    double z;
    double thisgain;
    if(passno == 0) {
        gain[cnt] = get_gain(dz);
        thisgain = gain[cnt];

        if(dz->vflag[IS_ITER_FADE]) {
            for(i=0; i < inmsampsize; i++) {
                z = outbuf[j] + (inbuf[i] * thisgain * level);
                *maxsamp = max(*maxsamp,fabs(z));
                outbuf[j] = (float)z;
                j += outchans;
                local_write_start++;
            }
        } else {
            for(i=0; i < inmsampsize; i++) {
                if(iterating)
                    z = outbuf[j] + (inbuf[i] * thisgain);
                else
                    z = outbuf[j] + inbuf[i];
                *maxsamp = max(*maxsamp,fabs(z));
                outbuf[j] = (float)z;
                j += outchans;
                local_write_start++;
            }
        }
    } else {
        thisgain = gain[cnt];

        if(dz->vflag[IS_ITER_FADE]) {
            for(i=0; i < inmsampsize; i++) {
                z = outbuf[j] + (inbuf[i] * thisgain * level);
                outbuf[j] = (float)z;
                j += outchans;
                local_write_start++;
            }
        } else {
            for(i=0; i < inmsampsize; i++) {
                if(iterating)
                    z = outbuf[j] + (inbuf[i] * thisgain);
                else
                    z = outbuf[j] + inbuf[i];
                outbuf[j] = (float)z;
                j += outchans;
                local_write_start++;
            }
        }
    }
    return(local_write_start);
}

/**************************** ITER_SHIFT_INTERP ***************************/

//TW COMPLETELY UPDATED FUNCTION : (flt-converted)
int iter_shift_interp(int cnt,int passno, double *gain,double *pshift,int local_write_start,
                      int inmsampsize,double level,double *maxsamp,int pstep,int iterating,int thischan,dataptr dz)
{
    int outchans = dz->iparam[MITER_OCHANS];
    register int i = 0, j = (local_write_start * outchans) + thischan;
    double d = 0.0, part = 0.0;
    float val, nextval, diff;
    float *outbuf = dz->sampbuf[1];
    float *inbuf  = dz->sampbuf[0];
    double z;
    double thisgain;
    if(passno == 0) {
        gain[cnt] = get_gain(dz);
        thisgain = gain[cnt];

        if(dz->vflag[IS_ITER_FADE]) {
            while(i < inmsampsize) {
                val     = inbuf[i++];
                nextval = inbuf[i];
                diff    = nextval - val;
                z = val + ((double)diff * part);
                z = (z * thisgain * level);
                z += outbuf[j];
                //                              *maxsamp = max(*maxsamp,abs(z));
                *maxsamp = max(*maxsamp,fabs(z));
                outbuf[j] = (float)z;
                j += outchans;
                local_write_start++;
                d      += dz->param[pstep];
                i      = (int)d;                        /* TRUNCATE */
                part   = d - (double)i;
            }
        } else {
            while(i < inmsampsize) {
                val     = inbuf[i++];
                nextval = inbuf[i];
                diff    = nextval - val;
                z = val + ((double)diff * part);
                if(iterating)
                    z = (z * thisgain);
                z += outbuf[j];
                //                              *maxsamp = max(*maxsamp,abs(z));
                *maxsamp = max(*maxsamp,fabs(z));
                outbuf[j] = (float)z;
                j += outchans;
                local_write_start++;
                d      += dz->param[pstep];
                i      = (int)d;                        /* TRUNCATE */
                part   = d - (double)i;
            }
        }
        pshift[cnt] = get_pshift(dz);
        dz->param[pstep] = pshift[cnt];
    } else {
        thisgain = gain[cnt];

        if(dz->vflag[IS_ITER_FADE]) {
            while(i < inmsampsize) {
                val     = inbuf[i++];
                nextval = inbuf[i];
                diff    = nextval - val;
                z = val + ((double)diff * part);
                z = (z * thisgain * level);
                z += outbuf[j];
                outbuf[j] = (float)z;
                j += outchans;
                local_write_start++;
                d      += dz->param[pstep];
                i      = (int)d;                        /* TRUNCATE */
                part   = d - (double)i;
            }
        } else {
            while(i < inmsampsize) {
                val     = inbuf[i++];
                nextval = inbuf[i];
                diff    = nextval - val;
                z = val + ((double)diff * part);
                if(iterating)
                    z = (z * thisgain);
                z += outbuf[j];
                local_write_start++;
                outbuf[j] = (float)z;
                j += outchans;
                d      += dz->param[pstep];
                i      = (int)d;                        /* TRUNCATE */
                part   = d - (double)i;
            }
        }
        dz->param[pstep] = pshift[cnt];
    }
    return(local_write_start);
}

/**************************** FIXA_ITER ***************************/

//TW COMPLETELY UPDATED FUNCTION : (flt-converted)
int fixa_iter(int cnt,int passno,double *gain,int local_write_start,int inmsampsize,double level,double *maxsamp,int iterating,int thischan,dataptr dz)
{
    int outchans = dz->iparam[MITER_OCHANS];
    register int i, j = (local_write_start * outchans) + thischan;
    float *outbuf = dz->sampbuf[1];
    float *inbuf  = dz->sampbuf[0];
    double z;

    if(passno ==0) {
        if(dz->vflag[IS_ITER_FADE]) {
            for(i=0; i < inmsampsize; i++) {
                z = outbuf[j] + (inbuf[i] * level);
                *maxsamp = max(*maxsamp,fabs(z));
                outbuf[j]  = (float)z;
                j += outchans;
                local_write_start++;
            }
        } else {
            for(i=0; i < inmsampsize; i++) {
                z = outbuf[j] + inbuf[i];
                *maxsamp = max(*maxsamp,fabs(z));
                outbuf[j]  = (float)z;
                j += outchans;
                local_write_start++;
            }
        }
    } else {
        if(dz->vflag[IS_ITER_FADE]) {
            for(i=0; i < inmsampsize; i++) {
                z = outbuf[j] + (inbuf[i] * level * gain[cnt]);
                outbuf[j]  = (float)z;
                j += outchans;
                local_write_start++;
            }
        } else {
            for(i=0; i < inmsampsize; i++) {
                if(iterating)
                    z = outbuf[j] + (inbuf[i] * gain[cnt]);
                else
                    z = outbuf[j] + inbuf[i];
                outbuf[j]  = (float)z;
                j += outchans;
                local_write_start++;
            }
        }
    }
    return(local_write_start);
}

/**************************** FIXA_ITER_SHIFT_INTERP ***************************/

//TW COMPLETELY UPDATED FUNCTION : (flt-converted)
int fixa_iter_shift_interp(int cnt,int passno,double *gain,double *pshift,int local_write_start,
                           int inmsampsize,double level,double *maxsamp,int pstep,int iterating,int thischan,dataptr dz)
{
    int outchans = dz->iparam[MITER_OCHANS];
    register int i = 0, j = (local_write_start * outchans) + thischan;
    double d = 0.0, part = 0.0;
    float val, nextval, diff;
    float *outbuf = dz->sampbuf[1];
    float *inbuf  = dz->sampbuf[0];
    double z;

    if(passno == 0) {
        if(dz->vflag[IS_ITER_FADE]) {
            while(i < inmsampsize) {
                val     = inbuf[i++];
                nextval = inbuf[i];
                diff    = nextval - val;
                z = val + ((double)diff * part);
                z = (z * level);
                z += outbuf[j];
                *maxsamp = max(*maxsamp,fabs(z));
                outbuf[j] = (float)z;
                j += outchans;
                local_write_start++;
                d      += dz->param[pstep];
                i      = (int)d;                        /* TRUNCATE */
                part   = d - (double)i;
            }
        } else {
            while(i < inmsampsize) {
                val     = inbuf[i++];
                nextval = inbuf[i];
                diff    = nextval - val;
                z = val + ((double)diff * part);
                z += outbuf[j];
                *maxsamp = max(*maxsamp,fabs(z));
                outbuf[j] = (float)z;
                j += outchans;
                local_write_start++;
                d      += dz->param[pstep];
                i      = (int)d;                        /* TRUNCATE */
                part   = d - (double)i;
            }
        }
        pshift[cnt] = get_pshift(dz);
    } else {
        if(dz->vflag[IS_ITER_FADE]) {
            while(i < inmsampsize) {
                val     = inbuf[i++];
                nextval = inbuf[i];
                diff    = nextval - val;
                z = val + ((double)diff * part);
                z = (z * level * gain[cnt]);
                z += outbuf[j];
                outbuf[j] = (float)z;
                j += outchans;
                local_write_start++;
                d      += dz->param[pstep];
                i      = (int)d;                        /* TRUNCATE */
                part   = d - (double)i;
            }
        } else {
            while(i < inmsampsize) {
                val     = inbuf[i++];
                nextval = inbuf[i];
                diff    = nextval - val;
                z = val + ((double)diff * part);
                if(iterating)
                    z = (z * gain[cnt]);
                z += outbuf[j];
                outbuf[j] = (float)z;
                j += outchans;
                local_write_start++;
                d      += dz->param[pstep];
                i      = (int)d;                        /* TRUNCATE */
                part   = d - (double)i;
            }
        }
    }
    dz->param[pstep] = pshift[cnt];
    return(local_write_start);
}

/******************************** GET_GAIN *****************************/

double get_gain(dataptr dz)
{
    double scatter;
    double newlgain;
    newlgain = dz->param[MITER_GAIN];
    if(dz->vflag[IS_ITER_ASCAT]) {
        scatter  = drand48() * dz->param[MITER_ASCAT];
        scatter  = 1.0 - scatter;
        newlgain = scatter * (double)dz->param[MITER_GAIN];
    }
    return(newlgain);
}

/******************************** GET_PSHIFT *****************************/

double get_pshift(dataptr dz)
{
    double scatter;
    scatter = (drand48() * 2.0) - 1.0;
    scatter *= dz->param[MITER_PSCAT];
    return(pow(2.0,scatter * OCTAVES_PER_SEMITONE));
}

/*************************** CREATE_ITERBUFS **************************
 *
 * (1)  Create extra spaces for interpolation guard points at end of infile.
 *
 * (2)  Allow for any cumulative addition errors in interpolation.
 *
 * (3)  Output buffer must be at least as big as the overflow buffer.
 *      Output buffer must be big enough for the whole of any possible
 *      data overflow (in overflow_size buff) to be copied back into it.
 *      This is because the overflow buffer is ZEROED after such a copy
 *      and if a 2nd copy of the overflow back into the main buffer
 *      were necessary , we would be copying zeroes rather than true data.
 *
 *
 *              true buffer                             overflow
 *  |-----------------------------|------------------------------------------|
 *                          worst                         ^                                                                              ^
 *                  possible case                 ^                                                                              ^
 *                                            ^----->-delayed by maxdelay_size to ->-----^
 *                                                        ^<-restored by -buffer_size into truebuf-<-^
 *  |<-------- BUFFER_SIZE------->
 *
 */

int create_mchiterbufs(double maxpscat,dataptr dz)
{
    size_t bigbufsize, seccnt, outchans = dz->iparam[MITER_OCHANS];
    double k;
    size_t extra_space, infile_space = dz->insams[0], big_buffer_size;
    size_t overflowsize;
    size_t framesize = F_SECSIZE * sizeof(float);
    size_t bigchunk, min_bufsize;

    if(dz->vflag[IS_ITER_PSCAT]) {
        infile_space++;                 /* 1 */
        k = pow(2.0,maxpscat * OCTAVES_PER_SEMITONE);
        overflowsize = round((double)dz->insams[0] * k) + 1;
        overflowsize += ITER_SAFETY;                                            /* 2 */
    } else
        overflowsize = dz->insams[0];

    overflowsize *= outchans;
    if((seccnt = infile_space/F_SECSIZE) * F_SECSIZE < infile_space)
        seccnt++;
    infile_space = F_SECSIZE * seccnt;

    extra_space = (infile_space * outchans) + overflowsize;
    min_bufsize = (extra_space * sizeof(float)) + framesize;
    bigchunk = (size_t) Malloc(-1);
    if(bigchunk < min_bufsize)
        bigbufsize = framesize;
    else {
        bigbufsize = bigchunk - extra_space*sizeof(float);
        bigbufsize = (bigbufsize/framesize) * framesize;
        if(bigbufsize <= 0)
            bigbufsize = framesize;
    }
    dz->buflen     = (int)(bigbufsize/sizeof(float));
    big_buffer_size = dz->buflen + extra_space;
    if((dz->bigbuf = (float *) Malloc(big_buffer_size * sizeof(float)))==NULL) {
        sprintf(errstr, "INSUFFICIENT MEMORY to create sound buffers.\n");
        return(MEMORY_ERROR);
    }
    dz->sbufptr[0] = dz->sampbuf[0] = dz->bigbuf;
    dz->sbufptr[1] = dz->sampbuf[1] = dz->sampbuf[0] + infile_space;
    dz->sbufptr[2] = dz->sampbuf[2] = dz->sampbuf[1] + (dz->buflen * outchans);
    dz->sbufptr[3] = dz->sampbuf[3] = dz->sampbuf[2] + overflowsize;
    memset((char *)dz->sampbuf[0],0,(size_t)(infile_space * sizeof(float)));
    memset((char *)dz->sampbuf[1],0,(size_t)(dz->buflen * outchans * sizeof(float)));
    memset((char *)dz->sampbuf[2],0,(size_t)(overflowsize * sizeof(float)));
    return(FINISHED);
}

/**************************** ITERATE_PREPROCESS ******************************/

int iterate_preprocess(dataptr dz)
{
    int exit_status;
    double maxrand, maxpscat, mindelay;
    int mindelay_samps, is_unity_gain = FALSE;
    if(dz->iparam[MITER_RSEED] > 0)
        srand((int)dz->iparam[MITER_RSEED]);
    else
        initrand48();
    if((exit_status = get_maxvalue_of_rand(&maxrand,dz))<0)
        return(exit_status);
    if((exit_status = get_maxvalue_of_pscat(&maxpscat,dz))<0)
        return(exit_status);
    if((exit_status = get_minvalue_of_delay(&mindelay,dz))<0)
        return(exit_status);
    mindelay_samps = round(mindelay * (double)dz->infile->srate);
    if(dz->param[MITER_GAIN]==DEFAULT_ITER_GAIN)
        set_default_gain(mindelay_samps,dz);
    set_default_delays(dz);
    reverse_fadevals(dz);
    dz->param[MITER_STEP] = 1.0; /* 1st sound is exact copy of orig */
    if(flteq(dz->param[MITER_GAIN],1.0))
        is_unity_gain = TRUE;
    setup_iter_process_type(is_unity_gain,dz);
    if((dz->iparray[0] = (int *)malloc(dz->iparam[MITER_OCHANS] * sizeof(int)))==NULL) {
        sprintf(errstr,"INSUFFICIENT MEMORY to make channel perm array.\n");
        return(MEMORY_ERROR);
    }
    if(sloom) {
        dz->vflag[IS_ITER_DELAY] = 1;
        if(flteq(dz->param[MITER_RANDOM],0.0))
            dz->vflag[IS_ITER_RAND] = 0;
        else
            dz->vflag[IS_ITER_RAND] = 01;

        if(flteq(dz->param[MITER_PSCAT],0.0))
            dz->vflag[IS_ITER_PSCAT] = 0;
        else
            dz->vflag[IS_ITER_PSCAT] = 1;

        if(flteq(dz->param[MITER_ASCAT],0.0))
            dz->vflag[IS_ITER_ASCAT] = 0;
        else
            dz->vflag[IS_ITER_ASCAT] = 1;

        if(flteq(dz->param[MITER_FADE],0.0) || flteq(dz->param[MITER_FADE],1.0))
            dz->vflag[IS_ITER_FADE] = 0;
        else
            dz->vflag[IS_ITER_FADE] = 1;

        if(flteq(dz->param[MITER_GAIN],0.0))
            dz->vflag[IS_ITER_GAIN] = 0;
        else
            dz->vflag[IS_ITER_GAIN] = 1;

        if(flteq(dz->iparam[MITER_RSEED],0))
            dz->vflag[IS_ITER_RSEED] = 0;
        else
            dz->vflag[IS_ITER_RSEED] = 1;
    }
    return create_mchiterbufs(maxpscat,dz);
}

/*************************** GET_MAXVALUE_OF_RAND ****************************/

int get_maxvalue_of_rand(double *maxrand,dataptr dz)
{
    int exit_status;
    if(dz->brksize[MITER_RANDOM]) {
        if((exit_status = get_maxvalue_in_brktable(maxrand,MITER_RANDOM,dz))<0)
            return(exit_status);
    } else
        *maxrand = dz->param[MITER_RANDOM];
    return(FINISHED);
}

/************************* GET_MAXVALUE_OF_PSCAT ****************************/

int get_maxvalue_of_pscat(double *maxpscat,dataptr dz)
{
    int exit_status;
    if(dz->brksize[MITER_PSCAT]) {
        if((exit_status = get_maxvalue_in_brktable(maxpscat,MITER_PSCAT,dz))<0)
            return(exit_status);
    } else
        *maxpscat = dz->param[MITER_PSCAT];
    return(FINISHED);
}

/************************* GET_MINVALUE_OF_DELAY ****************************/

int get_minvalue_of_delay(double *mindelay,dataptr dz)
{
    int exit_status;
    if(dz->brksize[MITER_DELAY]) {
        if((exit_status = get_minvalue_in_brktable(mindelay,MITER_DELAY,dz))<0)
            return(exit_status);
    } else
        *mindelay = dz->param[MITER_DELAY];
    return(FINISHED);
}

/************************* REVERSE_FADEVALS ****************************/

void reverse_fadevals(dataptr dz)
{
    double *p, *pend;

    if(dz->brksize[ITER_FADE]==0)
        dz->param[ITER_FADE] = 1.0 - dz->param[ITER_FADE];
    else {
        p    = dz->brk[ITER_FADE] + 1;
        pend = dz->brk[ITER_FADE] + (dz->brksize[ITER_FADE] * 2);
        while(p < pend) {
            *p = 1.0 - *p;
            p += 2;
        }
    }
}

/************************** SET_DEFAULT_GAIN ****************************/

void set_default_gain(int mindelay_samps,dataptr dz)
{
    int maxoverlay_cnt;
    maxoverlay_cnt = round(((double)dz->insams[0]/(double)mindelay_samps)+1.0);
    if(dz->vflag[IS_ITER_RAND])
        maxoverlay_cnt++;
    dz->param[MITER_GAIN]   = 1.0/(double)maxoverlay_cnt;
}

/*********************** SET_DEFAULT_DELAYS ****************************/

void set_default_delays(dataptr dz)
{
    if(dz->vflag[IS_ITER_DELAY]) {
        if(!dz->brksize[MITER_DELAY])
            dz->iparam[MITER_MSAMPDEL] = round(dz->param[MITER_DELAY] * (double)dz->infile->srate);
    } else
        dz->iparam[MITER_MSAMPDEL] = dz->insams[0];     /* default */
}

/********************* SETUP_ITER_PROCESS_TYPE ********************************/

void setup_iter_process_type(int is_unity_gain,dataptr dz)
{
    dz->iparam[MITER_DO_SCALE] = TRUE;
    if(dz->vflag[IS_ITER_PSCAT])
        dz->iparam[MITER_PROCESS] = MN_INTP_SHIFT;
    else
        dz->iparam[MITER_PROCESS] = MONO;
    if(!dz->vflag[IS_ITER_ASCAT]) {
        if(is_unity_gain)
            dz->iparam[MITER_DO_SCALE] = FALSE;
        dz->iparam[MITER_PROCESS] += FIXED_AMP;
    }
}

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

int usage2(char *str)
{
    if(!strcmp(str,"iter")) {
        fprintf(stdout,
                "ITERATE INPUT SOUND IN A FLUID MANNER, SCATTERING TO MULTICHANNEL SPACE\n\n"
                "USAGE: mchiter iter 1 infil outfil outchans outduration\n"
                "     [-ddelay] [-rrand] [-ppshift] [-aampcut] [-ffade] [-ggain] [-sseed]\n"
                "OR:    mchiter iter 2 infil outfil outchans repetitions\n"
                "     [-ddelay] [-rrand] [-ppshift] [-aampcut] [-ffade] [-ggain] [-sseed]\n\n"
                "outduration  duration of output file.\n"
                "repetitions  number of iterations of the source.\n"
                "delay   (average) delay between iterations. Default: infile duration.\n"
                "rand    delaytime-randomisation: Range 0 - 1: Default 0\n"
                "pshift  max of random pitchshift of each iter: Range 0 - %.0lf semitones\n"
                "        e.g.  2.5 =  2.5 semitones up or down.\n"
                "ampcut  max of random amp-reduction on each iter: Range 0-1: default 0\n"
                "fade    (average) amplitude fade beween iters (Range 0 - 1: default 0)\n"
                "gain    Overall Gain: Range 0 - 1:\n"
                "        special val 0 (default), gives best guess for no distortion.\n"
                "seed    the same seed-number will produce identical output on rerun,\n"
                "        (Default: (0) random sequence is different every time).\n",ITER_MAXPSHIFT);
    } else
        fprintf(stdout,"Unknown option '%s'\n",str);
    return(USAGE_ONLY);
}

/******************************** USAGE3 ********************************/

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

/*************************** PERMUTE_CHANS ***************************/

void permute_chans(int outchans,dataptr dz)
{
    int n, t;
    for(n=0;n<outchans;n++) {
        t = (int)(drand48() * (double)(n+1));    /* TRUNCATE */
        if(t==n)
            prefixch(n,outchans,dz);
        else
            insertch(n,t,outchans,dz);

    }
}

/****************************** INSERTCH ****************************/

void insertch(int n,int t,int outchans,dataptr dz)
{
    shuflupch(t+1,outchans,dz);
    dz->iparray[0][t+1] = n;
}

/****************************** PREFIX ****************************/

void prefixch(int n,int outchans,dataptr dz)
{
    shuflupch(0,outchans,dz);
    dz->iparray[0][0] = n;
}

/****************************** SHUFLUPCH ****************************/

void shuflupch(int k,int outchans,dataptr dz)
{
    int n;
    for(n = outchans - 1; n > k; n--)
        dz->iparray[0][n] = dz->iparray[0][n-1];
}

/***************************** MI_SETUP_INTERNAL_ARRAYS_AND_ARRAY_POINTERS **************************/

int mi_setup_internal_arrays_and_array_pointers(dataptr dz)
{
    int n;
    dz->iarray_cnt = 1;
    if((dz->iparray = (int **)malloc(dz->iarray_cnt * sizeof(int *)))==NULL) {
        sprintf(errstr,"INSUFFICIENT MEMORY for internal int arrays.\n");
        return(MEMORY_ERROR);
    }
    for(n=0;n<dz->iarray_cnt;n++)
        dz->iparray[n] = NULL;
    return(FINISHED);
}
