ComposerDesktopProject/dev/new/iterfof.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
 *
 */



//
//  BUG dz->brksize[ITF_DEL] IS 14 .... should be much bigger ... this is 



#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 <science.h>
#include <ctype.h>
#include <sfsys.h>
#include <string.h>
#include <srates.h>
#include <pnames.h>
#include <extdcon.h>
#include <limits.h>
#ifdef unix
#include <aaio.h>
#endif


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

char errstr[2400];

#define infilespace  rampbrksize
#define ampvaried    is_rectified
#define overflowsize temp_sampsize

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

#define MINFADE 2       // minimum fade of element in MS

const char* cdp_version = "7.1.0";

//CDP LIB REPLACEMENTS
static int setup_iterfof_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_iterfof_param_ranges_and_defaults(dataptr dz);
static int handle_the_outfile(int *cmdlinecnt,char ***cmdline,dataptr dz);
static int setup_and_init_input_param_activity(dataptr dz,int tipc);
static int setup_input_param_defaultval_stores(int tipc,aplptr ap);
static int establish_application(dataptr dz);
static int initialise_vflags(dataptr dz);
static int setup_parameter_storage_and_constants(int storage_cnt,dataptr dz);
static int initialise_is_int_and_no_brk_constants(int storage_cnt,dataptr dz);
static int mark_parameter_types(dataptr dz,aplptr ap);
static int assign_file_data_storage(int infilecnt,dataptr dz);
static int get_tk_cmdline_word(int *cmdlinecnt,char ***cmdline,char *q);
static int get_the_process_no(char *prog_identifier_from_cmdline,dataptr dz);
static int get_the_mode_from_cmdline(char *str,dataptr dz);
static int setup_and_init_input_brktable_constants(dataptr dz,int brkcnt);
static int iterfof(dataptr dz);
static int create_the_iterbufs(dataptr dz);
static int do_iterfof_preprocess(dataptr dz);
static int read_stepd_delay_value(double thistime,double *notestarttime,double *noteendtime,double *portint,dataptr dz);
static int transpos_read_element(int *transposcnt,double incr,dataptr dz);
static int dovibrato(int *delays,dataptr dz);
static int setup_lineportion_params(double *linegains,double *linefades, double *upfades, double *linegaps,dataptr dz);
static int read_lineportion_gain(double thistime,double *lasttime,double *linegain,double *linegains,dataptr dz);
static int read_lineportion_envelope(double thistime,double *envlasttime,int *linedur,int *linefade,double *linefadeincr,int *upfade,double *upfadeincr, double *lineenv,
                            double *linefades,double *upfades,double *linegaps, int minfade, double *pshift, dataptr dz);
static double portion_env(int *linedur,int *linefade,double *lineenv,double linefadeincr,int *upfade,double upfadeincr);

/**************************************** 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 = 4;
        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_iterfof_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_iterfof_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_formant_quiksearch() redundant
//  handle_the_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 = 4;
    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_iterfof_preprocess(dz))<0) {
        print_messages_and_close_sndfiles(exit_status,is_launched,dz);
        return(FAILED);
    }
    //spec_process_file =
    if((exit_status = iterfof(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 mallo changed to calloc; helps debug verison run as release! */

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

/************************* SETUP_ITERLINE_APPLICATION *******************/

int setup_iterfof_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,0,2,2,"Dd"))<0)
        return(FAILED);
    if(EVEN(dz->mode))
        exit_status = set_vflgs(ap,"patTErvVdD",10,"DDDDdDDDDD","s",1,1,"i");
    else
        exit_status = set_vflgs(ap,"patTErvVdDgGFfSPi",17,"DDDDdDDDDDDDDDDiD","s",1,1,"i");
    if(exit_status < 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;
    dz->maxmode = 4;
    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 != MONO)  {
            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_ITERLINE_PARAM_RANGES_AND_DEFAULTS *******************/

int setup_iterfof_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()
    if(dz->mode <2) {
        ap->lo[ITF_DEL]     = -24;
        ap->hi[ITF_DEL]     = 12;
        ap->default_val[ITF_DEL] = 0;   
    } else {
        ap->lo[ITF_DEL]     = 24;
        ap->hi[ITF_DEL]     = 96;
        ap->default_val[ITF_DEL] = 60;  
    }
    ap->lo[ITF_DUR]     = dz->duration;
    ap->hi[ITF_DUR]     = BIG_TIME;
    ap->default_val[ITF_DUR] = 20;  
    ap->lo[ITF_RAND]    = 0.0;
    ap->hi[ITF_RAND]    = 1.0;
    ap->default_val[ITF_RAND] = 0.0;
    ap->lo[ITF_VMIN]    = 0.0;
    ap->hi[ITF_VMIN]    = 20.0;
    ap->default_val[ITF_VMIN] = 0.0;
    ap->lo[ITF_VMAX]    = 0.0;
    ap->hi[ITF_VMAX]    = 20.0;
    ap->default_val[ITF_VMAX] = 0.0;
    ap->lo[ITF_DMIN]    = 0.0;
    ap->hi[ITF_DMIN]    = 2.0;
    ap->default_val[ITF_DMIN] = 0.0;
    ap->lo[ITF_DMAX]    = 0.0;
    ap->hi[ITF_DMAX]    = 2.0;
    ap->default_val[ITF_DMAX] = 0.0;
    ap->lo[ITF_PRND]    = 0.0;
    ap->hi[ITF_PRND]    = 2.0;
    ap->default_val[ITF_PRND] = 0.0;
    ap->lo[ITF_AMPC]    = 0.0;
    ap->hi[ITF_AMPC]    = 1.0;
    ap->default_val[ITF_AMPC] = 0.0;
    ap->lo[ITF_TRIM]    = 0.0;
    ap->hi[ITF_TRIM]    = dz->duration;
    ap->default_val[ITF_TRIM] = 0.0;
    ap->lo[ITF_TRBY]    = 0.0;
    ap->hi[ITF_TRBY]    = dz->duration;
    ap->default_val[ITF_TRBY] = 0.0;
    ap->lo[ITF_SLOP]    = 1.0;
    ap->hi[ITF_SLOP]    = 4.0;
    ap->default_val[ITF_SLOP] = 1.0;
    if(EVEN(dz->mode)) {
        ap->lo[ITF_SEED1]   = 0.0;
        ap->hi[ITF_SEED1]   = MAXSHORT;
        ap->default_val[ITF_SEED1] = 0.0;
    } else {
        ap->lo[ITF_GMIN]    = 0.0;
        ap->hi[ITF_GMIN]    = 1.0;
        ap->default_val[ITF_GMIN] = 1.0;
        ap->lo[ITF_GMAX]    = 0.0;
        ap->hi[ITF_GMAX]    = 1.0;
        ap->default_val[ITF_GMAX] = 1.0;
        ap->lo[ITF_UFAD]    = 0.0;
        ap->hi[ITF_UFAD]    = 10;
        ap->default_val[ITF_UFAD] = 0.0;
        ap->lo[ITF_FADE]    = 0.0;
        ap->hi[ITF_FADE]    = 10;
        ap->default_val[ITF_FADE] = 0.0;
        ap->lo[ITF_GAPP]    = 0.0;
        ap->hi[ITF_GAPP]    = 1.0;
        ap->default_val[ITF_GAPP] = 0.0;
        ap->lo[ITF_PORT]    = -1;
        ap->hi[ITF_PORT]    = 2.0;
        ap->default_val[ITF_PORT] = 0.0;
        ap->lo[ITF_PINT]    = 0.0;
        ap->hi[ITF_PINT]    = 2.0;
        ap->default_val[ITF_PINT] = 0.0;
        ap->lo[ITF_SEED2]   = 0.0;
        ap->hi[ITF_SEED2]   = MAXSHORT;
        ap->default_val[ITF_SEED2] = 0.0;
    }
    dz->maxmode = 4;
    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_iterfof_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("iterfof");
    return(USAGE_ONLY);
}

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

int get_the_process_no(char *prog_identifier_from_cmdline,dataptr dz)
{
    if(!strcmp(prog_identifier_from_cmdline,"iterfof"))             dz->process = ITERFOF;
    else {
        fprintf(stderr,"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,"iterfof")) {
        fprintf(stderr,
        "USAGE:\n"
        "iterfof iterfof 1-4 infile outfile linedata outduration\n"
        "     [-pprand] [-aampcut] [-ttrimto] [-Ttrimby] [-Etrimslope]\n"
        "     [-rrand] [-vvibmin] [-Vvibmax] [-depmin] [-Ddepmax]\n"
        "     [-ggainmin] [-Ggainmax] [-Fupfade] [-ffade] [-Sseparation]\n"
        "     [-Pportamento] [-iinterval]\n"
        "     [-sseed]\n"
        "\n"
        "ITERATE AN INPUT FOF OR SOUND-PACKET, FOLLOWING A DEFINED PITCHLINE.\n"
        "\n"
        "MODES 1 & 2: linedata is transposition in semitones.\n"
        "(Input sound assumed to represent 1 wavelength, at zero transposition.)\n"
        "MODES 3 & 4: linedata is MIDI pitch.\n"
        "(Input sound can be anything.)\n"
        "\n"
        "LINEDATA   Modes 1 & 2: semitone-transposition (can vary through time).\n"
        "           (varies delay between segments in output)\n"
        "           Modes 3 & 4: MIDI-pitch (can vary through time).\n"
        "IF \"linedata\" is a breakpoint file\n"
        "MODES 1 & 3: interpolate between timed values in the file.\n"
        "MODES 2 & 4: step between timed values in the file.\n"
        "\n"
        "SEED       the same seed-number will produce similar output on rerun.\n"
        "\n"
        "(FOR MORE INFORMATION ----- hit any key)\n"
        "\n");
    }
    while(!kbhit())
        ;
    if(kbhit()) {
        fprintf(stderr,
        "Parameters of the line-elements\n"
        "\n"
        "PRAND      randomises pitch of segments (semitones in range +- 2)\n"
        "AMPCUT     max of random amp-reduction on each iter: Range 0-1:\n"
        "           default 0 (no amp-reduction)\n"
        "TRIMTO     Shorten elements to specified duration\n"
        "TRIMBY     Fade elements over specified duration\n"
        "TRIMSLOPE  Slope of any fades\n"
        "\n"
        "Parameters of the line\n"
        "\n"
        "RAND       transposition/pitch randomisation: Range 0 - 1: Default 0\n"
        "           (randomises delay between segments in output)\n"
        "VIBMIN/MAX Min & max vib frequency (frq set rand between these).\n"
        "DEPMIN/MAX Min & max vib depth (semitones) (depth set rand between these).\n"
        "(Modes 2 and 4 only)\n"
        "GAINMIN/MAX min and max level of stable-pitched portions of line.\n"
        "UPFADE     duration of fade into stable-pitched portions.\n"
        "FADE       duration of fade out of stable-pitched portions.\n"
        "SEPARATION end-fraction of any stable-pitched portion which is silent.\n"
        "PORTAMENTO type of line-portamento (if any)\n"
        "           0 = none : 1 = up : -1 = down : 2 = randomly up/down\n"
        "INTERVAL   Portamento interval (semitones : range 0 - 2)\n"
        "           Interval attained only by start of next note.\n"
        "           (If note fades before next note enters, interval not reached).\n");
    } else
        fprintf(stderr,"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);
}

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

int do_iterfof_preprocess(dataptr dz)
{
    int n, m;
    double wavelen, val, srate;
    if(dz->brksize[ITF_DEL] == 1) {
        dz->param[ITF_DEL] = dz->brk[ITF_DEL][1];
        dz->brksize[ITF_DEL] = 0;                   //  Shrink 1-line brkfile to single value parameter
    }
    if(dz->mode < 2) {  //  Data is transpositions
        wavelen = (double)dz->insams[0];
        if(dz->brksize[ITF_DEL]) {
            for(n=0,m=1;n<dz->brksize[ITF_DEL];n++,m+=2) {
                val = pow(2.0,dz->brk[ITF_DEL][m]/SEMITONES_PER_OCTAVE); // Semitones to frq ratio
                dz->brk[ITF_DEL][m] = round(wavelen/val);               //  Delay = wavelen/frqratio
            }
        } else {
            val = pow(2.0,dz->param[ITF_DEL]/SEMITONES_PER_OCTAVE);     //  Semitones to frq ratio
            dz->param[ITF_DEL] = round(wavelen/val);                    //  Delay = wavelen/frqratio
        }
    } else {
        srate = (double)dz->infile->srate;
        if(dz->brksize[ITF_DEL]) {
            for(n=0,m=1;n<dz->brksize[ITF_DEL];n++,m+=2) {
                val = miditohz(dz->brk[ITF_DEL][m]);                    //  MIDI to frq
                dz->brk[ITF_DEL][m] = round(srate/val);                 //  Delay = srate/frq
            }
        } else {
            val = miditohz(dz->param[ITF_DEL]);                         //  MIDI to frq
            dz->param[ITF_DEL] = round(srate/val);                      //  Delay = srate/frq
        }
    }
    if(dz->brksize[ITF_AMPC] == 0 && dz->param[ITF_AMPC] == 0.0)
        dz->ampvaried = 0;
    else
        dz->ampvaried = 1;
    if(ODD(dz->mode)) {
        if(dz->brksize[ITF_DEL] == 0) {     //  If only a single transpos/pitch specified
            if(dz->brksize[ITF_GMIN] || dz->brksize[ITF_GMAX] || dz->brksize[ITF_FADE] || dz->brksize[ITF_GAPP]) {
                sprintf(errstr,"Line portion parameters set as time-varying, but only one note is being generated.\n");
                return DATA_ERROR;
            }
        }
    }
    return create_the_iterbufs(dz);
}

/*************************** CREATE_THE_ITERBUFS **************************
 *
 * (1)  Create extra spaces for interpolation guard points at end of infile.
 *
 * (2)  Allow for transposition of source
 *
 * (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 (insams[0])             (insams[0]) + SAFETY
 *  |-----------------------------|------------------------------------------|
 *                                ^                 worst                    ^
 *                                ^             possible case                ^
 *  |<-------- BUFFER_SIZE------->
 *
 */

int create_the_iterbufs(dataptr dz)
{
    int seccnt;
    int extra_space, infile_space, big_buffer_size;
    int overflow_size;

    infile_space = dz->insams[0] + 1;                   /* Allows for wraparound point for tansposition interps */
    overflow_size = dz->insams[0];
    overflow_size *= 2;                                     /* Allows for transposition of source up to 1 octave lower */   
    if((seccnt = overflow_size/F_SECSIZE) * F_SECSIZE < overflow_size)
        seccnt++;
    overflow_size = F_SECSIZE * overflow_size;
    if((seccnt = infile_space/F_SECSIZE) * F_SECSIZE < infile_space)
        seccnt++;
    infile_space = F_SECSIZE * seccnt;

    extra_space = infile_space + (overflow_size * 2);   /* overflow_size for overflow, and also for transposition buffer */
    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;                       //  INPUT BUFFER
    dz->sbufptr[1] = dz->sampbuf[1] = dz->sampbuf[0] + infile_space;    //  OUTPUT BUFFER
    dz->sbufptr[2] = dz->sampbuf[2] = dz->sampbuf[1] + dz->buflen;      //  OUTPUT BUFFER OVERFLOW
    dz->sbufptr[3] = dz->sampbuf[3] = dz->sampbuf[2] + overflow_size;   //  TRANSPOSITION BUFFER
    dz->sbufptr[4] = dz->sampbuf[4] = dz->sampbuf[3] + overflow_size;
    memset((char *)dz->sampbuf[0],0,(size_t)(infile_space * sizeof(float)));
    memset((char *)dz->sampbuf[1],0,(size_t)(dz->buflen * sizeof(float)));
    memset((char *)dz->sampbuf[2],0,(size_t)(overflow_size * sizeof(float)));
    dz->infilespace = infile_space; 
    dz->overflowsize = overflow_size;
    return(FINISHED);
}

/****************************** ITERFOF *************************/

#define ACCEPTABLE_MAXLEVEL 0.9

int iterfof(dataptr dz)
{
    int    exit_status, dovib;
    int   n, m, k, obufpos, absobufpos, *delays, ldelay, transposcnt, last_write = 0, this_last_write, local_last_write, minfade;
    int    bufs_written, bufs_before;
    double time = 0.0, normaliser = 1.0, gain, delay, srate = (double)dz->infile->srate, *gains, *pshifts;
    double *linegains = NULL, *linefades = NULL, *upfades = NULL, *linegaps = NULL;
    double maxoutsamp = 0.0, pshift;
    int    passno;
    float  *ibuf = dz->sampbuf[0], *obuf = dz->sampbuf[1], *ovflw = dz->sampbuf[2], *tbuf = dz->sampbuf[3], *getbuf;
    int   dozeros, trimdur, trimfade, fade_to, write_to;
    double spliceval, spliceincr, splicer, lasttime, envlasttime, lineoutgain, outtime;
    double linegain = 0.0, linefadeincr = 0.0, lineenv = 1.0, portint = 0.0;
    int   linedur = 0, linefade = 0, upfade = 0;
    double upfadeincr = 0.0, notestarttime = 0.0, noteendtime = 0.0;
    double thisdelay, time_in_note, note_dur, timefrac, current_port_int, current_port_trans;
    int   itfseed;
    if(EVEN(dz->mode))
        itfseed = dz->iparam[ITF_SEED1];
    else
        itfseed = dz->iparam[ITF_SEED2];
    if(sloom)
        dz->tempsize = (int)round(dz->param[ITF_DUR] * srate) * dz->infile->channels;
    srand((int)itfseed);
    initrand48();

    minfade = (int)round(MINFADE * MS_TO_SECS * srate);

    print_outmessage_flush("Initial pass, checking segment count.\n");
    k = 0;
    notestarttime = -1.0;
    noteendtime = 0.0;
    while(time < dz->param[ITF_DUR]) {
        if(dz->brksize[ITF_DEL]) {
            if(ODD(dz->mode)) {
                if((exit_status = read_stepd_delay_value(time,&notestarttime,&noteendtime,&portint,dz))<0)
                    return exit_status;
                thisdelay = dz->param[ITF_DEL];
                if(!flteq(portint,0.0)) {                           //  If portamento interval > 0
                    time_in_note = time - notestarttime;            //  Find fraction of time into current note
                    note_dur = noteendtime - notestarttime;
                    timefrac = time_in_note/note_dur;
                    current_port_int = portint * timefrac;
                    current_port_trans = pow(2.0,(current_port_int/SEMITONES_PER_OCTAVE));
                    thisdelay /= current_port_trans;
                }
            } else {
                if((exit_status = read_value_from_brktable(time,ITF_DEL,dz))<0)
                    return exit_status;
                thisdelay = dz->param[ITF_DEL];
            }
        } else
            thisdelay = dz->param[ITF_DEL];

        if(dz->brksize[ITF_RAND]) {
            if((exit_status = read_value_from_brktable(time,ITF_RAND,dz))<0)
                return exit_status;
        }
        if(dz->param[ITF_RAND] > 0.0) {
            delay = (drand48() * 2.0) - 1.0;        //  Range -1 to +1
            delay /= 2.0;                           //  Range -1/2 to +1/2
            delay *= dz->param[ITF_RAND];           //  Range scaled to +- rand max * 1/2
            delay += 1.0;                           //  Range scaled to 1 +- rand max * 1/2
            delay *= thisdelay;
            ldelay = (int)round(delay);
        } else
            ldelay = (int)round(thisdelay);
        time += (double)ldelay/srate;               //  update time for next table-read
        k++;
    }
    dz->itemcnt = k;
    if((delays = (int *)malloc(sizeof(int) * (k + 20)))==NULL) {        //  20 is safety margin
        sprintf(errstr,"INSUFFICIENT MEMORY establishing delays store.\n");
        return(MEMORY_ERROR);
    }
    if((gains = (double *)malloc(sizeof(double) * (k + 20)))==NULL) {
        sprintf(errstr,"INSUFFICIENT MEMORY establishing gains store.\n");
        return(MEMORY_ERROR);
    }
    if((pshifts = (double *)malloc(sizeof(double) * (k + 20)))==NULL) {
        sprintf(errstr,"INSUFFICIENT MEMORY establishing gains store.\n");
        return(MEMORY_ERROR);
    }
    if(ODD(dz->mode)) {
        if((linegains = (double *)malloc(sizeof(double) * (dz->brksize[ITF_DEL] + 1)))==NULL) {
            sprintf(errstr,"INSUFFICIENT MEMORY establishing linegains store.\n");
            return(MEMORY_ERROR);
        }
        if((linefades = (double *)malloc(sizeof(double) * (dz->brksize[ITF_DEL] + 1)))==NULL) {
            sprintf(errstr,"INSUFFICIENT MEMORY establishing linefades store.\n");
            return(MEMORY_ERROR);
        }
        if((upfades = (double *)malloc(sizeof(double) * (dz->brksize[ITF_DEL] + 1)))==NULL) {
            sprintf(errstr,"INSUFFICIENT MEMORY establishing linefades store.\n");
            return(MEMORY_ERROR);
        }
        if((linegaps = (double *)malloc(sizeof(double) * (dz->brksize[ITF_DEL] + 1)))==NULL) {
            sprintf(errstr,"INSUFFICIENT MEMORY establishing linegaps store.\n");
            return(MEMORY_ERROR);
        }
        if((exit_status = setup_lineportion_params(linegains,linefades,upfades,linegaps,dz))<0)
            return exit_status;
    }


    srand((int)itfseed);                //  Restart SAME random sequence
    initrand48();
    notestarttime = -1.0;               //  Initialise reading of note starttimes
    noteendtime = 0.0;
    portint = 0.0;

    sndseekEx(dz->ifd[0],0L,0);
    memset((char *)dz->sampbuf[1],0,(dz->sampbuf[3] - dz->sampbuf[1]) * sizeof(float));
    time = 0.0;
    k = 0;
    while(time < dz->param[ITF_DUR]) {
        if(dz->brksize[ITF_DEL]) {
            if(ODD(dz->mode)) {
                if((exit_status = read_stepd_delay_value(time,&notestarttime,&noteendtime,&portint,dz))<0)
                    return exit_status;
                thisdelay = dz->param[ITF_DEL];
                if(!flteq(portint,0.0)) {                       //  If portamento interval > 0
                    time_in_note = time - notestarttime;        //  Find fraction of time into current note
                    note_dur = noteendtime - notestarttime;
                    timefrac = time_in_note/note_dur;
                    current_port_int = portint * timefrac;
                    current_port_trans = pow(2.0,(current_port_int/SEMITONES_PER_OCTAVE));
                    thisdelay /= current_port_trans;            //  Adjust current delay for any portamento
                }
            } else {
                if((exit_status = read_value_from_brktable(time,ITF_DEL,dz))<0)
                    return exit_status;
                thisdelay = dz->param[ITF_DEL];
            }
        } else
            thisdelay = dz->param[ITF_DEL];

        if(dz->brksize[ITF_RAND]) {
            if((exit_status = read_value_from_brktable(time,ITF_RAND,dz))<0)
                return exit_status;
        }
        if(dz->param[ITF_RAND] > 0.0) {
            delay = (drand48() * 2.0) - 1.0;        //  Range -1 to +1
            delay /= 2.0;                           //  Range -1/2 to +1/2
            delay *= dz->param[ITF_RAND];           //  Range scaled to +- rand max * 1/2
            delay += 1.0;                           //  Range scaled to 1 +- rand max * 1/2
            delay *= thisdelay;
            ldelay = (int)round(delay);
        } else
            ldelay = (int)round(thisdelay);
        delays[k] = ldelay;
        time += (double)ldelay/srate;               //  update time for next table-read
        k++;
    }

    dovib = 1;
    if(dz->brksize[ITF_VMIN]==0 && flteq(dz->param[ITF_VMIN],0.0)
    && dz->brksize[ITF_VMAX]==0 && flteq(dz->param[ITF_VMAX],0.0)
    && dz->brksize[ITF_DMIN]==0 && flteq(dz->param[ITF_DMIN],0.0)
    && dz->brksize[ITF_DMAX]==0 && flteq(dz->param[ITF_DMAX],0.0))
        dovib = 0;
    if(dovib) {
        if((exit_status = dovibrato(delays,dz))<0)
            return exit_status;
    }
    memset((char *)dz->sampbuf[0],0,(dz->sampbuf[3] - dz->sampbuf[0]) * sizeof(float));

    if((exit_status = read_samps(ibuf,dz))<0)
        return(exit_status);

    for(passno=2;passno<4;passno++) {
        sndseekEx(dz->ifd[0],0L,0);
        memset((char *)dz->sampbuf[1],0,(dz->sampbuf[3] - dz->sampbuf[1]) * sizeof(float));
        time = 0.0;
        lasttime = -1.0;
        envlasttime = -1.0;
        obufpos = 0;
        absobufpos = 0;
        bufs_written = 0;
        k = 0;
        if(passno == 2)
            print_outmessage_flush("Second pass, assessing level.\n");
        else {
            print_outmessage_flush("Third pass, writing sound.\n");
            dz->tempsize = dz->total_samps_written;
            dz->total_samps_written = 0;
        }
        display_virtual_time(0L,dz);
        fflush(stdout);
        for(k = 0;k < dz->itemcnt;k++) {
            if(passno == 2) {
                if(dz->brksize[ITF_PRND]) {
                    if((exit_status = read_value_from_brktable(time,ITF_PRND,dz))<0)
                        return exit_status;
                }
                if(flteq(dz->param[ITF_PRND],0.0))
                    pshifts[k] = 1.0;
                else {
                    pshift = (drand48() * 2.0) - 1.0;
                    pshift *= dz->param[ITF_PRND];
                    pshift = pow(2.0,pshift/SEMITONES_PER_OCTAVE);  //  semitones to frq ratio
                    pshifts[k] = 1.0/pshift;                        //  frq ratio to read-increment
                }
                if(dz->ampvaried) {
                    gain = drand48() * dz->param[ITF_AMPC]; //  Random amp reduction up to max at ITF_MAXC
                    gain = 1.0 - gain;                      //  Actual gain
                } else
                    gain = 1.0;
                if(ODD(dz->mode)) {
                    if((exit_status = read_lineportion_gain(time,&lasttime,&linegain,linegains,dz))<0)
                        return exit_status;
                    gain *= linegain;
                }
                gains[k] = gain;                            //  On pass 2, store gain
            }
            ldelay = delays[k];                             //  Get stored delay
            
            gain = gains[k] * normaliser;                   //  On pass 2, normaliser = 1: On pass 3, gain gets adjusted by normaliser (if ness)
            
            if(dz->brksize[ITF_TRIM]) {
                if((exit_status = read_value_from_brktable(time,ITF_TRIM,dz))<0)
                    return exit_status;
            }                                           
            trimdur = 0;                                //  Trim ZERO indicates no trim
            if(dz->param[ITF_TRIM] > 0.0) 
                trimdur = (int)round(dz->param[ITF_TRIM] * srate);

            if(dz->brksize[ITF_TRBY]) {
                if((exit_status = read_value_from_brktable(time,ITF_TRBY,dz))<0)
                    return exit_status;
            }                                           
            trimfade = 0;                               //  Trimfade ZERO indicates no fade
            if(dz->param[ITF_TRBY] > 0.0)
                trimfade = (int)round(dz->param[ITF_TRBY] * srate);
            
            if(!flteq(pshifts[k],1.0)) {
                if((exit_status = transpos_read_element(&transposcnt,pshifts[k],dz)) < 0)
                    return exit_status;                     //  Transpos source into intermediate tbuf
                getbuf = tbuf;                              //  Set to read from tbuf
            } else {
                transposcnt = dz->insams[0];                //  Simply a 1-1 read from input buffer
                getbuf = ibuf;                              //  Set to read from input buffer
            }
            dozeros = 0;            
            if(trimdur > 0) {                               //  If trim is to be done
                dozeros = max(transposcnt - trimdur,0);     //  Can the trim be done on the length of sound available (some smaples will be zeroed) ??
                if(dozeros  > 0) {                          //  If trim can be done
                    if(trimfade == 0)                       //  If no fade is specified, use minimum fade (if poss)
                        trimfade = min(transposcnt - dozeros,minfade);
                    else                                    //  Else use specified fade (if poss)
                        trimfade = min(transposcnt - dozeros,trimfade);
                } else if(trimfade > 0)                     //  If trim can't be done, but fade is specified
                        trimfade = min(transposcnt,trimfade); //    Set up fade

            } else if(trimfade > 0)                         //  If trim is not specified, but fade is set
                trimfade = min(transposcnt,trimfade);       //  Check fade length

            fade_to  = transposcnt - dozeros;               //  Number of non-zero samples to write
            write_to = fade_to - trimfade;                  //  Number of original level samples to write
            for(n = 0; n < write_to;n++) {                  //  Write all samples before any element_fade
                obuf[obufpos] = (float)(obuf[obufpos] + (getbuf[n] * gain));
                obufpos++;
            }
            if(trimfade) {                                  //  Where necessary, do fade of element
                spliceval = 1.0;
                spliceincr = 1.0/(double)trimfade;
                for(; n < fade_to;n++) {
                    spliceval = max(0.0,spliceval - spliceincr);
                    splicer = pow(spliceval,dz->param[ITF_SLOP]); 
                    obuf[obufpos] = (float)(obuf[obufpos] + (getbuf[n] * gain * splicer));
                    obufpos++;
                }
            }
            this_last_write = (bufs_written * dz->buflen) + obufpos;
            if(this_last_write > last_write)
                last_write = this_last_write;

            absobufpos += delays[k];                        //  Absolute position of next write in output
            bufs_before = absobufpos/dz->buflen;            //  Number of full buffers preceding this
            while(bufs_written < bufs_before) {             //  If not yet written this many bufs
                if(passno == 2) {                           //  output the missing bufs
                    if(ODD(dz->mode)) {                     //  Where line is in pitched portions, adjust for envelope of these pitched-portions
                        for(m = 0; m < dz->buflen;m++) {
                            outtime = (double)((bufs_written * dz->buflen) + m)/srate;
                            if((exit_status = read_lineportion_envelope(outtime,&envlasttime,&linedur,&linefade,&linefadeincr,&upfade,&upfadeincr,
                                &lineenv,linefades,upfades,linegaps,minfade,pshifts,dz))<0)
                                return exit_status;
                            lineoutgain = portion_env(&linedur,&linefade,&lineenv,linefadeincr,&upfade,upfadeincr);
                            maxoutsamp = max(maxoutsamp,fabs(obuf[m] * lineoutgain));
                        }

                    } else {
                        for(m = 0; m < dz->buflen;m++)
                            maxoutsamp = max(maxoutsamp,fabs(obuf[m]));
                    }
                } else {
                    if(ODD(dz->mode)) {                     //  Where line is in pitched portions, adjust for envelope of these pitched-portions
                        for(m = 0; m < dz->buflen;m++) {
                            outtime = (double)((bufs_written * dz->buflen) + m)/srate;
                            if((exit_status = read_lineportion_envelope(outtime,&envlasttime,&linedur,&linefade,&linefadeincr,&upfade,&upfadeincr,
                                &lineenv,linefades,upfades,linegaps,minfade,pshifts,dz))<0)
                                return exit_status;
                            lineoutgain = portion_env(&linedur,&linefade,&lineenv,linefadeincr,&upfade,upfadeincr);
                            obuf[m] = (float)(obuf[m] * lineoutgain);
                        }
                    }
                    if((exit_status = write_samps(obuf,dz->buflen,dz))<0)
                        return(exit_status);
                }
                memcpy((char *)obuf,(char *)ovflw,dz->buflen * sizeof(float));
                memset((char *)ovflw,0,dz->buflen * sizeof(float));
                bufs_written++;
            }
            obufpos = absobufpos % dz->buflen;              //  Find position in output buffer
            time += (double)delays[k]/srate;                //  update time for next table-read
        }
        local_last_write = last_write - (bufs_written * dz->buflen);
        if(local_last_write > 0) {                          //  Flush output
            if(passno == 2) {
                if(ODD(dz->mode)) {                 //  Where line is in pitched portions, adjust for envelope of these pitched-portions
                    for(m = 0; m < local_last_write;m++) {
                        outtime = (double)((bufs_written * dz->buflen) + m)/srate;
                        if((exit_status = read_lineportion_envelope(outtime,&envlasttime,&linedur,&linefade,&linefadeincr,&upfade,&upfadeincr,
                            &lineenv,linefades,upfades,linegaps,minfade,pshifts,dz))<0)
                            return exit_status;
                        lineoutgain = portion_env(&linedur,&linefade,&lineenv,linefadeincr,&upfade,upfadeincr);
                        maxoutsamp = max(maxoutsamp,fabs(obuf[m] * lineoutgain));
                    }
                } else {
                    for(m = 0; m < local_last_write;m++)
                        maxoutsamp = max(maxoutsamp,fabs(obuf[m]));
                }
            } else {
                if(ODD(dz->mode)) {                     //  Where line is in pitched portions, adjust for envelope of these pitched-portions
                    for(m = 0; m < local_last_write;m++) {
                        outtime = (double)((bufs_written * dz->buflen) + m)/srate;
                        if((exit_status = read_lineportion_envelope(outtime,&envlasttime,&linedur,&linefade,&linefadeincr,&upfade,&upfadeincr,
                            &lineenv,linefades,upfades,linegaps,minfade,pshifts,dz))<0)
                            return exit_status;
                        lineoutgain = portion_env(&linedur,&linefade,&lineenv,linefadeincr,&upfade,upfadeincr);
                        obuf[m] = (float)(obuf[m] * lineoutgain);
                    }
                }
                if((exit_status = write_samps(obuf,local_last_write,dz))<0)
                    return(exit_status);
            }
        }
        if(passno == 2) {                                   //  If overload, set normaliser < 1.0
            if(maxoutsamp > ACCEPTABLE_MAXLEVEL)
                normaliser = ACCEPTABLE_MAXLEVEL/maxoutsamp;
        }
    }
    return FINISHED;
}

/**************************** READ_STEPD_DELAY_VALUE *****************************/

int read_stepd_delay_value(double thistime,double *notestarttime,double *noteendtime,double *portint,dataptr dz)
{
    int exit_status;
    double *p, *del = dz->brk[ITF_DEL], *delend = dz->brk[ITF_DEL] + (dz->brksize[ITF_DEL] * 2);
    double currentnotestart = 0.0, val, thisport;
    int lastval = (dz->brksize[ITF_DEL] * 2) - 1;
    p = del;
    while(thistime >= *p) {
        p += 2;
        if(p >= delend) {
            dz->param[ITF_DEL] = del[lastval];
            currentnotestart = *(delend-2);
            *noteendtime = dz->param[ITF_DUR];
            break;
        }
    }
    if(p < delend) {
        dz->param[ITF_DEL] = *(p-1);
        currentnotestart = *(p-2); 
        *noteendtime = *p;
    }
    if(currentnotestart > *notestarttime) { //  IF in new note
        if(dz->iparam[ITF_PORT] == 0)                                       
            *portint = 0.0;
        else {                              //  IF portamento is set
            if(dz->brksize[ITF_PINT]) {     //  Get portamento interval
                if((exit_status = read_value_from_brktable(currentnotestart,ITF_PINT,dz))<0)
                    return exit_status;
            }
            thisport = dz->param[ITF_PINT];
            switch(dz->iparam[ITF_PORT]) {  //  Portamento up, down or randomly up/dn
            case(1):    
                break;
            case(-1):
                thisport = -thisport;
                break;
            default:
                val = drand48();
                if(val < 0.5)
                    thisport = -thisport;
                break;
            }
            *portint = thisport;            //  Set (end of) portamento interval
        }
    }
    *notestarttime = currentnotestart;      //  (Re)set start of current note
    return FINISHED;
}

/********************** TRANSPOS_READ_ELEMENT ********************************/

int transpos_read_element(int *transposcnt,double incr,dataptr dz)
{
    float *ibuf = dz->sampbuf[0], *tbuf = dz->sampbuf[3];
    int k, lo, hi;
    double dpos, loval, hival, diff, frac;
    dpos = 0.0;
    k = 0;
    while(dpos < (double)dz->insams[0]) {
        lo = (int)floor(dpos);
        hi = (int)ceil(dpos);
        frac = dpos - (double)lo;
        loval = ibuf[lo];
        hival = ibuf[hi];
        diff = hival - loval;
        tbuf[k++] = (float)(loval + (diff * frac));
        if(k > dz->overflowsize) {
            sprintf(errstr,"TRANSPOSITION BUFFER OVERFLOW\n");
            return PROGRAM_ERROR;
        }
        dpos += incr;
    }
    *transposcnt = k;
    return FINISHED;
}

/********************** DOVIBRATO ********************************/

int dovibrato(int *delays,dataptr dz)
{
    int cyclestart, n, exit_status;
    int *vdelays;
    double *sintab;
    double vfrq, vdep, time, sintabincr, sintabpos, loval, hival, frac, diff, vval, srate = (double)dz->infile->srate;
    double time_advance;
    int k, samptime, lo, hi;

    if((vdelays = (int *)malloc(sizeof(int) * dz->itemcnt))==NULL) {
        sprintf(errstr,"INSUFFICIENT MEMORY establishing vibrato delays store.\n");
        return(MEMORY_ERROR);
    }
    if((sintab = (double *)malloc(sizeof(double) * (TS_SINTABSIZE + 1)))==NULL) {
        sprintf(errstr,"INSUFFICIENT MEMORY establishing sintable array for vibrato.\n");
        return(MEMORY_ERROR);
    }
    for(n=0;n < TS_SINTABSIZE;n++)                                  //  Vibrato sintable
        sintab[n] = sin((double)n/(double)TS_SINTABSIZE) * TWOPI;
    sintab[n] = 0.0;                                                //  wraparound point

    if(dz->brksize[ITF_VMIN]) {                                     //  Initialise vibrato params
        if((exit_status = read_value_from_brktable(0,ITF_VMIN,dz))<0)
            return exit_status;
    }
    if(dz->brksize[ITF_VMAX]) {
        if((exit_status = read_value_from_brktable(0,ITF_VMAX,dz))<0)
            return exit_status;
    }
    vfrq = drand48() * (dz->param[ITF_VMAX] - dz->param[ITF_VMIN]);
    vfrq += dz->param[ITF_VMIN];
    time_advance = (double)delays[0]/srate;                     //  Set increment in sintable
    sintabincr = time_advance * TS_SINTABSIZE * vfrq;
    if(dz->brksize[ITF_DMIN]) {
        if((exit_status = read_value_from_brktable(0,ITF_DMIN,dz))<0)
            return exit_status;
    }
    if(dz->brksize[ITF_DMAX]) {
        if((exit_status = read_value_from_brktable(0,ITF_DMAX,dz))<0)
            return exit_status;
    }
    vdep = drand48() * (dz->param[ITF_DMAX] - dz->param[ITF_DMIN]);
    vdep += dz->param[ITF_DMIN];
    sintabpos = 0.0;
    samptime = 0;
    time = 0.0;
    cyclestart = 0;
    for(k=0;k < dz->itemcnt;k++) {
        if(cyclestart) {                    //  At the start of a vibrato sine-cycle
            time = (double)samptime/srate;  //  Reset all vibrato values
            if(dz->brksize[ITF_VMIN]) {     
                if((exit_status = read_value_from_brktable(time,ITF_VMIN,dz))<0)
                    return exit_status;
            }
            if(dz->brksize[ITF_VMAX]) {
                if((exit_status = read_value_from_brktable(time,ITF_VMAX,dz))<0)
                    return exit_status;
            }
            vfrq = drand48() * (dz->param[ITF_VMAX] - dz->param[ITF_VMIN]);
            vfrq += dz->param[ITF_VMIN];
            time_advance = (double)delays[k]/srate;                     //  Set increment in sintable
            sintabincr = time_advance * TS_SINTABSIZE * vfrq;
            if(dz->brksize[ITF_DMIN]) {
                if((exit_status = read_value_from_brktable(time,ITF_DMIN,dz))<0)
                    return exit_status;
            }
            if(dz->brksize[ITF_DMAX]) {
                if((exit_status = read_value_from_brktable(time,ITF_DMAX,dz))<0)
                    return exit_status;
            }
            vdep = drand48() * (dz->param[ITF_DMAX] - dz->param[ITF_DMIN]);
            vdep += dz->param[ITF_DMIN];
            cyclestart = 0;
        }
        lo = (int)floor(sintabpos); //  Read sin table, interpolating
        hi = (int)ceil(sintabpos);
        frac = sintabpos - (double)lo;
        loval = sintab[lo];
        hival = sintab[hi];
        diff = hival - loval;
        vval = loval + (diff * frac);
        vval *= vdep;                               //  Multiply by semitone depth
        vval = pow(2.0,vval/SEMITONES_PER_OCTAVE);  //  Convert to frq ratio
        vval = 1.0/vval;                            //  Convert to change in wavelen (> frq -> < wavelen)
        vdelays[k] = (int)round((double)delays[k] * vval);  //  Vibrato modifies wavelen
    
        sintabpos += sintabincr;                    //  Advance in sintable
        if(sintabpos >= TS_SINTABSIZE) {            //  Once sine-cycle completed, set flag to reset vibrato params (above)
            cyclestart = 1;
            sintabpos -= (double)TS_SINTABSIZE;
        }
        samptime += delays[k];              //  Advance time
    }
    for(k=0;k < dz->itemcnt;k++)            //  Convert orig delays to vibratoed delays
        delays[k] = vdelays[k];
    free(vdelays);
    return FINISHED;
}

/**************************** SETUP_LINEPORTION_PARAMS *****************************/

int setup_lineportion_params(double *linegains,double *linefades, double *upfades, double *linegaps,dataptr dz)
{
    int exit_status;
    double *p, *del = dz->brk[ITF_DEL], *delend = dz->brk[ITF_DEL] + (dz->brksize[ITF_DEL] * 2);
    int line_portion_cnt = 0, line_portion_end = dz->brksize[ITF_DEL] + 1;
    double time, linegain, diff;
    p = del;
    while(p < delend) {
        time = *p;
        if(line_portion_cnt >= line_portion_end) {
            sprintf(errstr,"Array overrun setting line-portion parameter arrays.\n");
            return PROGRAM_ERROR;
        }
        if(dz->brksize[ITF_GMIN]) {
            if((exit_status = read_value_from_brktable(time,ITF_GMIN,dz))<0)
                return exit_status;
        }
        if(dz->brksize[ITF_GMAX]) {
            if((exit_status = read_value_from_brktable(time,ITF_GMAX,dz))<0)
                return exit_status;
        }
        if(dz->brksize[ITF_FADE]) {
            if((exit_status = read_value_from_brktable(time,ITF_FADE,dz))<0)
                return exit_status;
        }
        if(dz->brksize[ITF_UFAD]) {
            if((exit_status = read_value_from_brktable(time,ITF_UFAD,dz))<0)
                return exit_status;
        }
        if(dz->brksize[ITF_GAPP]) {
            if((exit_status = read_value_from_brktable(time,ITF_GAPP,dz))<0)
                return exit_status;
        }
        if(!flteq(dz->param[ITF_GMIN],dz->param[ITF_GMAX])) {
            diff = dz->param[ITF_GMAX] - dz->param[ITF_GMIN];
            linegain = (drand48() * diff) + dz->param[ITF_GMIN];
        } else
            linegain = dz->param[ITF_GMAX];
        linegains[line_portion_cnt] = linegain;
        linefades[line_portion_cnt] = dz->param[ITF_FADE];
        upfades[line_portion_cnt]   = dz->param[ITF_UFAD];
        linegaps[line_portion_cnt]  = dz->param[ITF_GAPP];
        line_portion_cnt++;
        p +=2;
    }
    return(FINISHED);
}

/**************************** READ_LINEPORTION_GAIN *****************************/

int read_lineportion_gain(double thistime,double *lasttime,double *linegain,double *linegains,dataptr dz)
{
    double *p, *del, *delend;
    double portion_time;
    int k = 0;
    if(dz->brksize[ITF_DEL]) {
        del = dz->brk[ITF_DEL];
        delend = dz->brk[ITF_DEL] + (dz->brksize[ITF_DEL] * 2);
        p = del;
        while(thistime >= *p) {             //  Step forward in portion-pitches brkfile until time in brkfile exceeds NOW (thistime)
            k++;
            p += 2;
            if(p >= delend)                 //  If step off end of breakfile, quit
                break;
        }
        k--;
        p -= 2;                             //  We must be in previous brkfile portion, so step back to starttime of previous portion
        portion_time = *p;  
        if(portion_time > *lasttime) {      //  If starttime of current portion is NOT same as starttime of previous portion
            *linegain = linegains[k];       //  Reset the portion params
            *lasttime = portion_time;       //  And set new starttime for current portion
        }
    } else
        *linegain = 1.0;
    return(FINISHED);
}

/**************************** READ_LINEPORTION_ENVELOPE *****************************/

int read_lineportion_envelope(double thistime,double *envlasttime,int *linedur,int *linefade,double *linefadeincr,int *upfade,double *upfadeincr, double *lineenv,
                            double *linefades,double *upfades,double *linegaps, int minfade, double *pshifts,dataptr dz)
{
    double *p, *del, *delend;
    double portion_time, ratio, lineend, penultdur, nulineend, srate = (double)dz->infile->srate;
    int dur, fade, gap, up_fade, slopes;
    int k = 0;
    if(dz->brksize[ITF_DEL]) {
        del = dz->brk[ITF_DEL]; 
        delend = dz->brk[ITF_DEL] + (dz->brksize[ITF_DEL] * 2);
        p = del;
        while(thistime >= *p) {             //  Step forward in portion-pitches brkfile until time in brkfile exceeds NOW (thistime)
            k++;
            p += 2;
            if(p >= delend)                 //  If step off end of breakfile, quit
                break;
        }
        k--;
        p -= 2;                             //  We must be in previous brkfile portion, so step back to starttime of previous portion
        portion_time = *p;  
        if(portion_time > *envlasttime) {   //  If starttime of current portion is NOT same as starttime of previous portion
            p += 2;                         //  Find duration of new line-portion
            if(p >= delend) {
                lineend = dz->param[ITF_DUR] + (dz->duration/pshifts[dz->itemcnt-1]);
                if(p-4 >= dz->brk[ITF_DEL]) {
                    penultdur = *(p-2) - *(p-4);    //  Curtail last pitch to duration of prevoius line-pitch
                    nulineend = *(p-2) + penultdur;
                    lineend = min(lineend,nulineend);
                }
            }
            else
                lineend = *p;
            dur = (int)((double)(lineend - portion_time) * srate);
            gap = (int)((double)dur * linegaps[k]); //  Silence between portions is proportion of duration
            dur -= gap;                     //  Duration (at full level) reduced by length of gap
            up_fade = (int)(upfades[k] * srate);
            if(up_fade < minfade)           //  Upfade cannot be less than a (no-clicks) minimum
                up_fade = minfade;
            fade = (int)(linefades[k] * srate);     
            if(fade < minfade)              //  Fade cannot be less than a (no-clicks) minimum
                fade = minfade;
            if((slopes = up_fade + fade) >= dur) {
                ratio = (double)slopes/(double)dur;
                up_fade = (int)round(up_fade * ratio);
                fade = (int)round(fade * ratio);
                slopes = up_fade + fade;
                while(slopes >= dur) {
                    if(up_fade >= fade)
                        up_fade--;
                    else
                        fade--;
                    slopes--;
                }
            }
            dur -= slopes;                  //  Duration (at full level) reduced by length of fades
            *upfade = up_fade;
            *upfadeincr = 1.0/(double)up_fade;
            *linefadeincr = 1.0/fade;   
            *linedur = dur;                 //  Set up line-counters
            *linefade = fade;
            *lineenv  = 1.0;                //  initialise line envelope to 1.0
            *envlasttime = portion_time;    //  And set new starttime for current portion
        }
    } else {
        *linedur = INT_MAX;
        *linefade = 0;
        *lineenv = 1.0;
        *upfade = 0;
    }
    return(FINISHED);
}

/**************************** PORTION_ENV *****************************/

double portion_env(int *linedur, int *linefade, double *lineenv, double linefadeincr,int *upfade,double upfadeincr)
{
    double gain;
    if(*upfade > 0) {
        gain = max(0.0,1.0 - (*upfade * upfadeincr));
        (*upfade)--;
    } else if(*linedur > 0) {   //  Still in non-fade, non-silence part of portion
        gain = 1.0;
        (*linedur)--;           //  No change to level
    } else {
        if(*linefade > 0) {     //  If in fade
            *lineenv = max(*lineenv - linefadeincr,0.0);    //  Adjust lineenv
            gain = *lineenv;    //  Multiply element gain by lineenv
            (*linefade)--;
        } else {
            gain = 0.0;         //  If fade has reached 0 , gain is zero
        }
    }
    return gain;
}