ComposerDesktopProject/dev/new/iterlinef.c

/*
 * 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 <pnames.h>
#include <extdcon.h>


//#ifdef unix 
#define round(x) lround((x))
//#endif

#ifndef HUGE
#define HUGE 3.40282347e+38F
#endif

char errstr[2400];

#define infilespace  rampbrksize

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

const char* cdp_version = "7.1.0";

//CDP LIB REPLACEMENTS
static int setup_iterline_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_iterline_param_ranges_and_defaults(dataptr dz);
static int handle_the_outfile(int *cmdlinecnt,char ***cmdline,dataptr dz);
static int handle_the_special_data(char *str,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 iterline(dataptr dz);
static int create_the_iterbufs(double maxpscat,dataptr dz);
static int do_iterate_preprocess(dataptr dz);
static int read_the_input_snds(double *maxinsamp,int passno,dataptr dz);
static int iter_shift_interp_stereo(int cnt,int passno, double *gain,double *pshift,int local_write_start,
        double *maxoutsamp,int pstep,int iterating,double thistrans,dataptr dz);
static int fixa_iter_shift_interp_stereo(int cnt,int passno,double *gain,double *pshift,int local_write_start,
        double *maxoutsamp,int pstep,int iterating,double thistrans,dataptr dz);
static int read_interpd_transposition_value(double thistime,double *thistrans,dataptr dz);
static int read_stepd_transposition_value(double thistime,double *thistrans,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,
            double *maxoutsamp,int pstep,int iterating,double thistrans,dataptr dz);
static double get_gain(dataptr dz);
static double get_pshift(dataptr dz);
static void choose_the_transposed_snd(double *thistrans,int *filindx);



/**************************************** 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_iterline_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_iterline_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++;
    if((exit_status = handle_extra_infiles(&cmdline,&cmdlinecnt,dz))<0) {
        print_messages_and_close_sndfiles(exit_status,is_launched,dz);      
        return(FAILED);
    }
    if(dz->infilecnt != 25) {
        sprintf(errstr,"Process requires 25 input files.\n");
        return(USER_ERROR);
    }
    // handle_outfile() = 
    if((exit_status = handle_the_outfile(&cmdlinecnt,&cmdline,dz))<0) {
        print_messages_and_close_sndfiles(exit_status,is_launched,dz);
        return(FAILED);
    }
    dz->array_cnt = 1;
    if((dz->parray = (double **)malloc(dz->array_cnt * sizeof(double *)))==NULL) {
        sprintf(errstr,"INSUFFICIENT MEMORY to create segment lengths arrays.\n");
        return(MEMORY_ERROR);
    }
//  handle_formants()           redundant
//  handle_formant_quiksearch() redundant
    if((exit_status = handle_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() redundant
    is_launched = TRUE;
    dz->bufcnt = 28;
    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+1))==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 = do_iterate_preprocess(dz))<0) {
        print_messages_and_close_sndfiles(exit_status,is_launched,dz);
        return(FAILED);
    }
    //spec_process_file =
    if((exit_status = iterline(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():
    return(FINISHED);
}

/********************** SETUP_PARAMETER_STORAGE_AND_CONSTANTS ********************/
/* RWD malloc changed to calloc; helps debug version 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_ITERLINE_APPLICATION *******************/

int setup_iterline_application(dataptr dz)
{
    int exit_status;
    aplptr ap;
    if((exit_status = establish_application(dz))<0)     // GLOBAL
        return(FAILED);
    ap = dz->application;
    if((exit_status = set_param_data(ap,ITERTRANS,8,7,"dDDDD0di"))<0)
        return(FAILED);
    if((exit_status = set_vflgs(ap,"",0,"","n",1,0,"0"))<0)
        return(FAILED);
    // set_legal_infile_structure -->
    dz->has_otherfile = FALSE;
    // assign_process_logic -->
    dz->input_data_type = MANY_SNDFILES;
    dz->process_type    = UNEQUAL_SNDFILE;  
    dz->outfiletype     = SNDFILE_OUT;
    dz->maxmode = 2;
    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((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_ITERLINE_PARAM_RANGES_AND_DEFAULTS *******************/

int setup_iterline_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[ITER_DUR]    = dz->duration;
    ap->hi[ITER_DUR]    = BIG_TIME;
    ap->default_val[ITER_DUR]       = dz->duration * 2.0;   
    ap->lo[ITER_DELAY]  = FLTERR;
    ap->hi[ITER_DELAY]  = ITER_MAX_DELAY;
    ap->default_val[ITER_DELAY]     = dz->duration;
    ap->lo[ITER_RANDOM] = 0.0;
    ap->hi[ITER_RANDOM] = 1.0;
    ap->default_val[ITER_RANDOM]    = 0.0;
    ap->lo[ITER_PSCAT]  = 0.0;
    ap->hi[ITER_PSCAT]  = ITER_MAXPSHIFT;   
    ap->default_val[ITER_PSCAT]     = 0.0;
    ap->lo[ITER_ASCAT]  = 0.0;
    ap->hi[ITER_ASCAT]  = 1.0;
    ap->default_val[ITER_ASCAT]     = 0.0;
    ap->lo[ITER_GAIN]   = 0.0;
    ap->hi[ITER_GAIN]   = 1.0;
    ap->default_val[ITER_GAIN]      = DEFAULT_ITER_GAIN; /* 0.0 */ 
    ap->lo[ITER_RSEED]  = 0.0;
    ap->hi[ITER_RSEED]  = MAXSHORT;
    ap->default_val[ITER_RSEED]     = 0.0;
    dz->maxmode = 2;
    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_iterline_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)
{
    int exit_status;
    exit_status = set_internalparam_data("diiii", ap);
    return(exit_status);
}

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("iterlinef");
    return(USAGE_ONLY);
}

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

int get_the_process_no(char *prog_identifier_from_cmdline,dataptr dz)
{
    if(!strcmp(prog_identifier_from_cmdline,"iterlinef"))               dz->process = ITERLINEF;
    else {
        sprintf(errstr,"Unknown program identification string '%s'\n",prog_identifier_from_cmdline);
        return(USAGE_ONLY);
    }
    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,"iterlinef")) {
        fprintf(stdout,
        "USAGE:\n"
        "iterlinef iterlinef mode infile outfile tdata outduration\n"
        "     [-ddelay] [-rrand] [-ppshift] [-aampcut] [-ggain] [-sseed] [-n]\n"
        "\n"
        "ITERATE AN INPUT SOUND SET, FOLLOWING A TRANSPOSITION LINE.\n"
        "The input set must consist of 25 transpositions of a source\n"
        "at intervals of one semitone, in ascending order.\n"
        "Input sounds must be of approx equal duration.\n"
        "The central sound (file 13) is the reference sound for transpositions (see below)\n"
        "\n"
        "MODE 1: interpolate between transpositions.\n"
        "MODE 2: step between transpositions.\n"
        "\n"
        "TDATA   File of time-transposition pairs, transpositions in semitones.\n"
        "        Transpositions are relative to the central sound (file 13) of the set.\n"
        "DELAY   (average) delay between iterations.\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"
        "GAIN    Overall Gain: Range 0 - 1:\n"
        "        Special val 0, produces maximum acceptable level.\n"
        "        (this is overridden by the \"-n\" normalisation flag - see below).\n"
        "SEED    the same seed-number will produce identical output on rerun,\n"
        "        (Default: (0) random sequence is different every time).\n"
        "-n      Normalise output (max out level = max in level)> only with NON-zero seed.\n",ITER_MAXPSHIFT);
    } 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);
}

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

int get_the_mode_from_cmdline(char *str,dataptr dz)
{
    char temp[200], *p;
    if(sscanf(str,"%s",temp)!=1) {
        sprintf(errstr,"Cannot read mode of program.\n");
        return(USAGE_ONLY);
    }
    p = temp + strlen(temp) - 1;
    while(p >= temp) {
        if(!isdigit(*p)) {
            fprintf(stderr,"Invalid mode of program entered.\n");
            return(USAGE_ONLY);
        }
        p--;
    }
    if(sscanf(str,"%d",&dz->mode)!=1) {
        fprintf(stderr,"Cannot read mode of program.\n");
        return(USAGE_ONLY);
    }
    if(dz->mode <= 0 || dz->mode > dz->maxmode) {
        fprintf(stderr,"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);
}

/**************************** HANDLE_THE_SPECIAL_DATA ****************************/

int handle_the_special_data(char *str,dataptr dz)
{
    FILE *fp;
    double dummy, lasttime = 0.0;
    char temp[200], *p;
    int istime = 1;
    int cnt = 0;

    if((fp = fopen(str,"r"))==NULL) {
        sprintf(errstr,"Cannot open file %s to read transposition data.\n",str);
        return(DATA_ERROR);
    }
    while(fgets(temp,200,fp)!=NULL) {
        p = temp;
        while(isspace(*p))
            p++;
        if(*p == ';' || *p == ENDOFSTR) //  Allow comments in file
            continue;
        while(get_float_from_within_string(&p,&dummy)) {
            if(istime) {
                if(cnt == 0) {
                    if(dummy != 0.0) {
                        sprintf(errstr,"Initial time in data in file %s must be zero.\n",str);
                        return(DATA_ERROR);
                    }
                } else {
                    if(dummy <= lasttime) {
                        sprintf(errstr,"Times do not advance between %lf and %lf in file %s\n",lasttime,dummy,str);
                        return(DATA_ERROR);
                    }
                }
                lasttime = dummy;
            } else if(dummy > 12 || dummy < -12) {
                sprintf(errstr,"Found transposition value (%lf) out of range (-12 to +12) in file %s\n",dummy,str);
                return(DATA_ERROR);
            }
            istime = !istime;
            cnt++;
        }
    }
    if(cnt == 0) {
        sprintf(errstr,"No data found in file %s\n",str);
        return(DATA_ERROR);
    }
    if(!EVEN(cnt)) {
        sprintf(errstr,"Data not paired correctly in file %s\n",str);
        return(DATA_ERROR);
    }
    if((dz->parray[0] = (double *)malloc(cnt * sizeof(double)))==NULL) {
        sprintf(errstr,"INSUFFICIENT MEMORY to store transposition data.\n");
        return(MEMORY_ERROR);
    }
    cnt = 0;
    fseek(fp,0,0);
    while(fgets(temp,200,fp)!=NULL) {
        p = temp;
        while(isspace(*p))
            p++;
        if(*p == ';' || *p == ENDOFSTR) //  Allow comments in file
            continue;
        while(get_float_from_within_string(&p,&dummy)) {
            dz->parray[0][cnt] = dummy;
            cnt++;
        }
    }
    fclose(fp);
    dz->itemcnt = cnt;
    return FINISHED;
}

/**************************** DO_ITERATE_PREPROCESS ******************************/

int do_iterate_preprocess(dataptr dz)
{
    int exit_status, m;
    double maxpscat, mindelay;
    int is_unity_gain = FALSE;
    int mindelay_samps, inmsampsize, maxoverlay_cnt, maxlen;
    if(dz->iparam[ITER_RSEED] > 0)
        srand((int)dz->iparam[ITER_RSEED]);
    else {
        if(dz->vflag[0]) {
            sprintf(errstr,"NORMALISATION CANNOT BE USED IF SEED VALUE IS ZERO\n");
            return USER_ERROR;
        }
        initrand48();
    }
    if(dz->brksize[ITER_PSCAT]) {
        if((exit_status = get_maxvalue_in_brktable(&maxpscat,ITER_PSCAT,dz))<0)
            return(exit_status);
    } else
        maxpscat = dz->param[ITER_PSCAT];
    if(dz->vflag[0] == 0 && (dz->param[ITER_GAIN]==DEFAULT_ITER_GAIN)) {
        if(dz->brksize[ITER_DELAY]) {
            if((exit_status = get_minvalue_in_brktable(&mindelay,ITER_DELAY,dz))<0)
                return(exit_status);
        } else
            mindelay = dz->param[ITER_DELAY];
        mindelay_samps = round(mindelay * (double)dz->infile->srate);
        maxlen = dz->insams[0];
        for(m=1;m<dz->infilecnt;m++)
            maxlen = max(maxlen,dz->insams[m]);
        inmsampsize = maxlen/dz->infile->channels;
        maxoverlay_cnt = round(((double)inmsampsize/(double)mindelay_samps)+1.0);
        maxoverlay_cnt++;
        dz->param[ITER_GAIN]   = 1.0/(double)maxoverlay_cnt;
    } else
        dz->param[ITER_GAIN] = 1.0;
    
    if(!dz->brksize[ITER_DELAY])
        dz->iparam[ITER_MSAMPDEL] = round(dz->param[ITER_DELAY] * (double)dz->infile->srate);
    dz->param[ITER_STEP] = pow(2.0,dz->parray[0][1] * OCTAVES_PER_SEMITONE);; /* 1st sound is transposed by first transposition value */
    if(flteq(dz->param[ITER_GAIN],1.0))
        is_unity_gain = TRUE;
    dz->iparam[ITER_DO_SCALE] = TRUE;
    dz->iparam[ITER_PROCESS] = ST_INTP_SHIFT;
    if(dz->param[ITER_ASCAT] == 0.0) {
        if(is_unity_gain)
            dz->iparam[ITER_DO_SCALE] = FALSE;
        dz->iparam[ITER_PROCESS] = FIXA_ST_INTP_SHIFT;
    }
    return create_the_iterbufs(maxpscat,dz);
}

/*************************** CREATE_THE_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_the_iterbufs(double maxpscat,dataptr dz)
{
    int seccnt;
    double k;
    int extra_space, infile_space, max_infile_space, big_buffer_size;
    int overflowsize, maxinsize;

//    int framesize = F_SECSIZE * sizeof(float) * dz->infile->channels;
    int chans = dz->infile->channels, m;
//    unsigned int min_bufsize;
    maxinsize = dz->insams[0];
    for(m=1;m < dz->infilecnt;m++)
        maxinsize = max(maxinsize,dz->insams[m]);
    infile_space = maxinsize;
    if(dz->param[ITER_PSCAT] > 0.0) {
        infile_space += dz->infile->channels;           /* 1 */
        k = pow(2.0,maxpscat * OCTAVES_PER_SEMITONE);
        overflowsize = (round((double)(maxinsize/chans) * k) * chans) + 1;
        overflowsize += ITER_SAFETY;                        /* 2 */ 
    } else
        overflowsize = maxinsize;
    max_infile_space = 0;
    for(m=0;m < dz->infilecnt;m++) {
        infile_space = dz->insams[m];
        if((seccnt = dz->insams[m]/F_SECSIZE) * F_SECSIZE < infile_space)
            seccnt++;
        infile_space = F_SECSIZE * seccnt;
        max_infile_space = max(infile_space,max_infile_space);
    }
    infile_space = max_infile_space * dz->infilecnt;
    extra_space = infile_space + overflowsize;
//    min_bufsize = (extra_space * sizeof(float)) + framesize;
    dz->buflen     = infile_space;
    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;
    for(m=0;m<dz->infilecnt;m++)
        dz->sbufptr[m+1] = dz->sampbuf[m+1] = dz->sampbuf[m] + max_infile_space;
    dz->sbufptr[26] = dz->sampbuf[26] = dz->sampbuf[25] + dz->buflen;
    dz->sbufptr[27] = dz->sampbuf[27] = dz->sampbuf[26] + overflowsize;
    for(m=0;m<dz->infilecnt;m++)
        memset((char *)dz->sampbuf[m],0,(size_t)(max_infile_space * sizeof(float)));
    memset((char *)dz->sampbuf[25],0,(size_t)(dz->buflen * sizeof(float)));
    memset((char *)dz->sampbuf[26],0,(size_t)(overflowsize * sizeof(float)));
    dz->infilespace = infile_space; 
    return(FINISHED);
}

/****************************** DO_ITERATION **************************/

#define ACCEPTABLE_LEVEL 0.75

int iterline(dataptr dz)
{
    int    exit_status, iterating;
    int   write_end = 0, tail, cnt, arraysize = BIGARRAY, n;
    float *tailend;
    int    bufs_written, finished;
    double thistime, thistrans;
    int   out_sampdur = 0;
    int   write_start, local_write_start;
    double one_over_sr = 1.0/(double)(dz->infile->srate * dz->infile->channels), maxoutsamp = 0.0, maxinsamp = 0.0;
    int    passno, is_penult = 0, pstep, m;
    int   k;
    double *gain, *pshift, gaingain = -1.0;
    int   *wstart;
    double *trans = dz->parray[0];

    pstep = ITER_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);
    }
    out_sampdur  = round(dz->param[ITER_DUR] * (double)dz->infile->srate) * dz->infile->channels;
    if(sloom)
        dz->tempsize = out_sampdur;     
    thistrans = trans[1];
    for(passno=0;passno<2;passno++) {
        is_penult = 0;
        cnt = 0;
        bufs_written = 0;
        write_start = 0;
        maxoutsamp = 0.0;
        memset((char *)dz->sampbuf[25],0,dz->buflen * sizeof(float));
        for(m=0;m<dz->infilecnt;m++)
            sndseekEx(dz->ifd[m],0L,0);
        display_virtual_time(0L,dz);
        fflush(stdout);
        if(passno > 0) {
            print_outmessage_flush("Second pass, for greater level\n");
            dz->tempsize = dz->total_samps_written;
            dz->total_samps_written = 0;
            memset((char *)dz->sampbuf[0],0,(dz->sampbuf[27] - dz->sampbuf[0]) * sizeof(float));
        }
        if((exit_status = read_the_input_snds(&maxinsamp,passno,dz))<0)
            return(exit_status);
        if(maxinsamp <= 0.0) {
            sprintf(errstr,"NO SIGNIFICANT LEVEL IN INPUT SOUND\n");
            return DATA_ERROR;
        }
        if(dz->iparam[ITER_DO_SCALE]) {
            for(m=0;m<dz->infilecnt;m++) {
                for(n=0; n < dz->insams[m]; n++)
                    dz->sampbuf[m][n] = (float)(dz->sampbuf[m][n] * dz->param[ITER_GAIN]);
            }
        }
        /* 1 */
        local_write_start = 0;
        switch(dz->iparam[ITER_PROCESS]) {
        case(ST_INTP_SHIFT):        
            write_end = iter_shift_interp_stereo(0,passno,gain,pshift,local_write_start,&maxoutsamp,pstep,iterating,thistrans,dz);      
            break;
        case(FIXA_ST_INTP_SHIFT):   
            write_end = fixa_iter_shift_interp_stereo(0,passno,gain,pshift,local_write_start,&maxoutsamp,pstep,iterating,thistrans,dz); 
            break;
        }
        thistime = 0.0;
        if((exit_status = read_values_from_all_existing_brktables(thistime,dz))<0)
            return(exit_status);
        if(dz->mode == 0) {     //  interp transposition
            if((exit_status = read_interpd_transposition_value(thistime,&thistrans,dz)) < 0)
                return exit_status;
        } else {
            if((exit_status = read_stepd_transposition_value(thistime,&thistrans,dz)) < 0)
                return exit_status;
        }
        if(dz->brksize[ITER_DELAY])
            dz->iparam[ITER_MSAMPDEL] = round(dz->param[ITER_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(;;) {
            if(write_start >= out_sampdur)
                finished = TRUE;
            if(finished)
                break;
            while(local_write_start >= dz->buflen) {
                if(passno > 0) {
                    if((exit_status = write_samps(dz->sampbuf[25],dz->buflen,dz))<0)
                        return(exit_status);
                }
                bufs_written++;
                tail = write_end - dz->buflen;
                memset((char *)dz->sampbuf[25],0,dz->buflen * sizeof(float));
                if(tail > 0) {
                    memmove((char *)dz->sampbuf[25],(char *)dz->sampbuf[26],tail * sizeof(float));
                    tailend = dz->sampbuf[25] + tail;
                } else
                    tailend = dz->sampbuf[26];
                memset((char *)tailend,0,(dz->sampbuf[27] - tailend) * sizeof(float));
                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 gain values (2)\n");
                    return(MEMORY_ERROR);
                }
                if ((wstart = (int *)realloc((char *)wstart,arraysize * sizeof(int)))==NULL) {
                    sprintf(errstr,"Insufficient memory to store gain 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(dz->mode == 0) {     //  interp transposition
                if((exit_status = read_interpd_transposition_value(thistime,&thistrans,dz)) < 0)
                    return exit_status;
            } else {
                if((exit_status = read_stepd_transposition_value(thistime,&thistrans,dz)) < 0)
                    return exit_status;
            }
            if(is_penult) {
                dz->param[ITER_PSCAT] = 0.0;
                dz->param[ITER_ASCAT] = 0.0;
            }
            if(dz->brksize[ITER_DELAY])
                dz->iparam[ITER_MSAMPDEL] = round(dz->param[ITER_DELAY] * (double)dz->infile->srate);
            write_end = iterate(cnt,passno,gain,pshift,write_end,local_write_start,&maxoutsamp,pstep,iterating,thistrans,dz);
            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[25],write_end,dz))<0)
                    return(exit_status);
            }
        } else {
            if(maxoutsamp <= 0.0) {
                sprintf(errstr,"No significant signal level found");
                return(DATA_ERROR);
            }
            if(dz->vflag[0])
                gaingain = maxinsamp/maxoutsamp;
            else if(maxoutsamp < ACCEPTABLE_LEVEL || maxoutsamp > 0.99)
                gaingain = ACCEPTABLE_LEVEL/maxoutsamp;
            else
                gaingain = 1.0;
            switch(dz->iparam[ITER_PROCESS]) {
            case(ST_INTP_SHIFT):        
                for(k=0;k<=cnt;k++)
                    gain[k] *= gaingain;
                break;
            case(FIXA_ST_INTP_SHIFT):   
                for(k=0;k<=cnt;k++)
                    gain[k] = gaingain;
                break;
            }
        }
    }
    return FINISHED;
}

/*********************** ITER_SHIFT_INTERP_STEREO *************************/

//TW COMPLETELY UPDATED FUNCTION : (flt-converted)
int iter_shift_interp_stereo(int cnt,int passno, double *gain,double *pshift,int local_write_start,
        double *maxoutsamp,int pstep,int iterating,double thistrans,dataptr dz)
{
    register int i = 0, j = local_write_start, k, inmsampsize;
    int n, m;
    double d = 0.0, part = 0.0;
    float val, nextval, diff;
    float *outbuf = dz->sampbuf[25], *inbuf;
    double z;
    double thisgain;
    choose_the_transposed_snd(&thistrans,&m);   //  Selects the appropriate input sound, and resets the transpos value
    thistrans = pow(2.0,thistrans * OCTAVES_PER_SEMITONE);
    inbuf  = dz->sampbuf[m];
    inmsampsize = (dz->insams[m]/dz->infile->channels) + 1;
    dz->param[pstep] *= thistrans;
    if(passno == 0) {
        gain[cnt] = get_gain(dz);
        thisgain = gain[cnt];

        while(i < inmsampsize) {
            k = i*dz->infile->channels;
            for(n=0;n<dz->infile->channels;n++) {
                val     = inbuf[k];
                nextval = inbuf[k+dz->infile->channels];
                diff    = nextval - val;
                z = val + ((double)diff * part);
                if(iterating)
                    z = (z * thisgain);
                z += outbuf[j];
                *maxoutsamp = max(*maxoutsamp,fabs(z));
                outbuf[j++] = (float)z;
                k++;
            }
            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];

        while(i < inmsampsize) {
            k = i*dz->infile->channels;
            for(n=0;n<dz->infile->channels;n++) {
                val     = inbuf[k];
                nextval = inbuf[k+dz->infile->channels];
                diff    = nextval - val;
                z = val + ((double)diff * part);
                if(iterating)
                    z = (z * thisgain);
                z += outbuf[j];
                outbuf[j++] = (float)z;
                k++;
            }
            d   += dz->param[pstep];
            i    = (int)d;          /* TRUNCATE */
            part = d - (double)i; 
        }
        dz->param[pstep] = pshift[cnt];
    }
    return(j);
}

/*********************** FIXA_ITER_SHIFT_INTERP_STEREO *************************/

//TW COMPLETELY UPDATED FUNCTION : (flt-converted)
int fixa_iter_shift_interp_stereo(int cnt,int passno,double *gain,double *pshift,int local_write_start,
        double *maxoutsamp,int pstep,int iterating,double thistrans,dataptr dz)
{
    register int i = 0, j = local_write_start, k, inmsampsize;
    int n, m;
    double d = 0.0, part = 0.0;
    float val, nextval, diff;
    float *outbuf = dz->sampbuf[25], *inbuf;
    double z;
    choose_the_transposed_snd(&thistrans,&m);   //  Selects the appropriate input sound, and resets the transpos value
    thistrans = pow(2.0,thistrans * OCTAVES_PER_SEMITONE);
    inbuf  = dz->sampbuf[m];
    inmsampsize = (dz->insams[m]/dz->infile->channels) + 1;
    dz->param[pstep] *= thistrans;
    if(passno == 0) {
        while(i < inmsampsize) {
            k = i*dz->infile->channels;
            for(n=0;n<dz->infile->channels;n++) {
                val     = inbuf[k];
                nextval = inbuf[k+dz->infile->channels];
                diff    = nextval - val;
                z = val + ((double)diff * part);
                z += outbuf[j];
                *maxoutsamp = max(*maxoutsamp,fabs(z));
                outbuf[j++] = (float)z;
                k++;
            }
            d   += dz->param[pstep];
            i    = (int)d;          /* TRUNCATE */
            part = d - (double)i; 
        }
        pshift[cnt] = get_pshift(dz);
    } else {
        while(i < inmsampsize) {
            k = i*dz->infile->channels;
            for(n=0;n<dz->infile->channels;n++) {
                val     = inbuf[k];
                nextval = inbuf[k+dz->infile->channels];
                diff    = nextval - val;
                z = val + ((double)diff * part);
                if(iterating)
                    z = (z * gain[cnt]);
                z += outbuf[j];
                outbuf[j++] = (float)z;
                k++;
            }
            d   += dz->param[pstep];
            i    = (int)d;          /* TRUNCATE */
            part = d - (double)i; 
        }
    }
    dz->param[pstep] = pshift[cnt];
    return(j);
}

/**************************** READ_INTERPD_TRANSPOSITION_VALUE *****************************/

int read_interpd_transposition_value(double thistime,double *thistrans,dataptr dz)
{
    double *p, val, *trans = dz->parray[0], *transend = dz->parray[0] + dz->itemcnt;
    double hival, loval, hitim, lotim;
    p = trans;
    while(thistime >= *p) {
        p += 2;
        if(p >= transend) {
            *thistrans = trans[dz->itemcnt - 1];
            return FINISHED;
        }
    }
    hival  = *(p+1);
    hitim  = *p;
    loval  = *(p-1);
    lotim  = *(p-2);
    val    = (thistime - lotim)/(hitim - lotim);
    val   *= (hival - loval);
    val   += loval;
    *thistrans = val;
    return(FINISHED);
}

/**************************** READ_STEPD_TRANSPOSITION_VALUE *****************************/

int read_stepd_transposition_value(double thistime,double *thistrans,dataptr dz)
{
    double *p, *trans = dz->parray[0], *transend = dz->parray[0] + dz->itemcnt;
    double hival, loval, hitim, lotim, histep, lostep;
    p = trans;
    while(thistime >= *p) {
        p += 2;
        if(p >= transend) {
            *thistrans = trans[dz->itemcnt - 1];
            return FINISHED;
        }
    }
    hival  = *(p+1);
    hitim  = *p;
    loval  = *(p-1);
    lotim  = *(p-2);
    histep = hitim - thistime;
    lostep = thistime - lotim;
    if(histep < lostep)
        *thistrans = hival;
    else
        *thistrans = loval;
    return(FINISHED);
}

/*************************** READ_THE_INPUT_SNDS **************************/

int read_the_input_snds(double *maxinsamp,int passno,dataptr dz)
{
    int samps, k, samps_read;
    double thismaxinsamp;
    int n,m;
    if(passno == 0)
        *maxinsamp = HUGE;
    for(m=0;m<dz->infilecnt;m++) {
        if((samps_read = fgetfbufEx(dz->sampbuf[m], dz->insams[m]/* + SECSIZE*/,dz->ifd[m],0)) <= 0) {
            sprintf(errstr,"Can't read bytes from input soundfile\n");
            if(samps_read<0)
                return(SYSTEM_ERROR);
            return(DATA_ERROR);
        }
        if(samps_read!=dz->insams[m]) {
            sprintf(errstr, "Failed to read all of source file. read_the_input_snds()\n");
            return(PROGRAM_ERROR);
        }
        samps = samps_read / dz->infile->channels;

        if(dz->param[ITER_PSCAT] > 0.0) {
            k = samps * dz->infile->channels;
            for(n=0;n<dz->infile->channels;n++) {
                dz->sampbuf[m][k] = (float)0;
                k++;        /* GUARD POINTS FOR INTERPOLATION */
            }
        }
        if(passno == 0) {
            thismaxinsamp = 0.0;
            for(k=0;k < dz->insams[m];k++) {
                if(fabs(dz->sampbuf[m][k]) > thismaxinsamp)
                    thismaxinsamp = fabs(dz->sampbuf[m][k]);
            }
            if(thismaxinsamp < *maxinsamp)
                *maxinsamp = thismaxinsamp;     //  Find MINIMUM maximum
        }
    }
    return(FINISHED);
}

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

int get_next_writestart(int write_start,dataptr dz)
{
    int this_step;
    double d;  
    int mwrite_start = write_start/dz->infile->channels;
    if(dz->param[ITER_RANDOM] > 0.0) {
        d = ((drand48() * 2.0) - 1.0) * dz->param[ITER_RANDOM];
        d += 1.0;
        this_step = (int)round((double)dz->iparam[ITER_MSAMPDEL] * d);
        mwrite_start += this_step;
    } else
        mwrite_start += dz->iparam[ITER_MSAMPDEL];
    write_start = mwrite_start * dz->infile->channels;
    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,
 double *maxoutsamp,int pstep,int iterating,double thistrans,dataptr dz)
{
    int wr_end = 0;
    switch(dz->iparam[ITER_PROCESS]) {
    case(ST_INTP_SHIFT):        
        wr_end = iter_shift_interp_stereo(cnt,pass,gain,pshift,local_write_start,maxoutsamp,pstep,iterating,thistrans,dz);      
        break;
    case(FIXA_ST_INTP_SHIFT):   
        wr_end = fixa_iter_shift_interp_stereo(cnt,pass,gain,pshift,local_write_start,maxoutsamp,pstep,iterating,thistrans,dz); 
        break;
    }
    return max(wr_end,write_end);
}

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

double get_gain(dataptr dz)
{
    double scatter;
    double newlgain = 0.0;
    newlgain = dz->param[ITER_GAIN];
    if(dz->param[ITER_ASCAT] > 0.0) {
        scatter  = drand48() * dz->param[ITER_ASCAT];
        scatter  = 1.0 - scatter;
        newlgain = scatter * (double)dz->param[ITER_GAIN];
    }
    return(newlgain);
}

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

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

/*************************** CHOOSE_THE_TRANSPOSED_SND **************************/

void choose_the_transposed_snd(double *thistrans,int *filindx)
{
    int tone_transpose;

// TRANSPOSITION IS STILL IN SEMITONES : CONVERT TO NEAREST
    if(*thistrans < 0.0)
        tone_transpose = -(int)round(-(*thistrans));
    else
        tone_transpose = (int)round((*thistrans));
    *filindx = tone_transpose + 12;
    *thistrans -= (tone_transpose);     //  Transposition of actual sound used
}