ComposerDesktopProject/dev/science/rotor.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
 *
 */

/*  SYNTHESIS FROM ROTATING ARMATURES ....
 *
 *              params            0       1         2       3           4           5         6         7            7      8
 *              params         ROT_CNT ROT_PMIN ROT_PMAX ROT_NSTEP  ROT_PCYC  ROT_TCYC  ROT_PHAS     ROT_DUR     ROT_GSTEP ROT_DOVE
 *  rotor rotor 1   infile env notecnt minmidi maxmidi  maxnotedur  protspeed drotspeed inital-phase out_duration step    -dx
 *  rotor rotor 2-3 infile env notecnt minmidi maxmidi  maxnotedur  protspeed drotspeed inital-phase out_duration         -dx       
 *                                                                                                                          x in ms
 *  Take a line with points marked at regular(?) intervals, y (height) determines pitch.
 *  Rotate the line about centre, so (if clockwise) pitchset falls slightly then more then more,
 *  until reaches maximum, then rises rapidly rises less etc till all down to same etc
 *
 *                                              @
 *      
 *                                   @                    @
 *                                              @
 *                    @               @                  @
 *                      @                   
 *  @  @  @  @  @         @            @        @       @   ETC
 *                          @               
 *                            @         @              @
 *                                              @
 *                                       @            @
 *
 *                                              @
 *   repet-note        falling      falling   chord  rising 
 *
 *
 *
 *  Take a line with points marked at regular(?) intervals, "x - minx" determines time.
 *  Rotate the line about centre.
 *
 *                                              @
 *      
 *                                   @                    @
 *                                              @
 *                    @               @                  @
 *                      @                   
 *  @  @  @  @  @         @            @        @       @   ETC
 *  1  2  3  4  5           @               
 *  zero                      @         @              @
 *  time                                        @
 *  slow              1 2 3 4 5          @            @
 *  tempo             zero           12345            12345 
 *                    time           zero       @     zero
 *                    faster         time       zero  time
 *                                   very       time  very
 *                                   fast       Tutti fast
 *
 *
 *
 *  infile = waveform to read for synth
 *  env = envelope to impose on synthd sounds
 *  notecnt = number of notes in set.
 *  maxnotestep = max step between notes in slowest set
 *  protspeed = speed of rotation of pitch line
 *  drotspeed = speed of rotation of time line  = number of pitchlines before we're back to where we started
 *  initial-phase = (initial) phase difference between pitch and time rotations
 *      (this will change if rot speeds are different)
 *  step = time step between each pitch-set in mode 1
 *  mode 2 uses an extra non-sounding event at end of time row, to determine where
 *      next timerow begins, hence it dilates and contracts timewise with rotation of time-rotor.
 *  mode 3 superimposes first note of next row on last note of previous.
 */

#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>

#define is_stereo   is_rectified
#define ROOT2       (1.4142136)

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

char errstr[2400];

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

const char* cdp_version = "7.0.0";

//CDP LIB REPLACEMENTS
static int check_rotor_param_validity_and_consistency(dataptr dz);
static int setup_rotor_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_rotor_param_ranges_and_defaults(dataptr dz);
static int handle_the_outfile(int *cmdlinecnt,char ***cmdline,dataptr dz);
static int open_the_outfile(dataptr dz);
static int setup_and_init_input_param_activity(dataptr dz,int tipc);
static int setup_input_param_defaultval_stores(int tipc,aplptr ap);
static int establish_application(dataptr dz);
static int initialise_vflags(dataptr dz);
static int setup_parameter_storage_and_constants(int storage_cnt,dataptr dz);
static int initialise_is_int_and_no_brk_constants(int storage_cnt,dataptr dz);
static int mark_parameter_types(dataptr dz,aplptr ap);
static int assign_file_data_storage(int infilecnt,dataptr dz);
static int get_tk_cmdline_word(int *cmdlinecnt,char ***cmdline,char *q);
static int get_the_process_no(char *prog_identifier_from_cmdline,dataptr dz);
static int get_the_mode_from_cmdline(char *str,dataptr dz);
static int setup_and_init_input_brktable_constants(dataptr dz,int brkcnt);
static int handle_the_special_data(char *str,dataptr dz);
static int create_rotor_sndbufs(dataptr dz);
static int rotor_param_preprocess(dataptr dz);
static int rotor(dataptr dz) ;
static int write_event(double time,double thispitch,double tabincr,int tabsize,int *obufpos,double normaliser,double line_angle,double pos,dataptr dz);
static int get_event_level(double time,double thispitch,double tabincr,int tabsize,int *obufpos,double *normaliser,double line_angle,double pos,dataptr dz);
static int read_value_from_brkarray(double *env,int *nextind,double *val,double thistime,dataptr dz);
static void time_display(int samps_sent,dataptr dz);
static int write_rotor_samps(float *obuf,int samps_sent,dataptr dz);

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

int main(int argc,char *argv[])
{
    int exit_status;
    dataptr dz = NULL;
    char **cmdline;
    int  cmdlinecnt;
    int n;
    //aplptr ap;
    int is_launched = FALSE;
    if(argc==2 && (strcmp(argv[1],"--version") == 0)) {
        fprintf(stdout,"%s\n",cdp_version);
        fflush(stdout);
        return 0;
    }
                        /* CHECK FOR SOUNDLOOM */
    if((sloom = sound_loom_in_use(&argc,&argv)) > 1) {
        sloom = 0;
        sloombatch = 1;
    }
    if(sflinit("cdp")){
        sfperror("cdp: initialisation\n");
        return(FAILED);
    }
                          /* SET UP THE PRINCIPLE DATASTRUCTURE */
    if((exit_status = establish_datastructure(&dz))<0) {                    // CDP LIB
        print_messages_and_close_sndfiles(exit_status,is_launched,dz);
        return(FAILED);
    }
    if(!sloom) {
        if(argc == 1) {
            usage1();   
            return(FAILED);
        } else if(argc == 2) {
            usage2(argv[1]);    
            return(FAILED);
        }
    }
    if(!sloom) {
        if((exit_status = make_initial_cmdline_check(&argc,&argv))<0) {     // CDP LIB
            print_messages_and_close_sndfiles(exit_status,is_launched,dz);
            return(FAILED);
        }
        cmdline    = argv;
        cmdlinecnt = argc;
        if((get_the_process_no(argv[0],dz))<0)
            return(FAILED);
        cmdline++;
        cmdlinecnt--;
        dz->maxmode = 3;
        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_rotor_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_rotor_param_ranges_and_defaults(dz))<0) {
        exit_status = print_messages_and_close_sndfiles(exit_status,is_launched,dz);
        return(FAILED);
    }
    // open_first_infile        CDP LIB
    if((exit_status = open_first_infile(cmdline[0],dz))<0) {    
        print_messages_and_close_sndfiles(exit_status,is_launched,dz);  
        return(FAILED);
    }
    cmdlinecnt--;
    cmdline++;

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

//  handle_formants()           redundant
//  handle_formant_quiksearch() redundant
//  handle_special_data .....
    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....
    if((exit_status = check_rotor_param_validity_and_consistency(dz))<0) {
        print_messages_and_close_sndfiles(exit_status,is_launched,dz);
        return(FAILED);
    }
    if((exit_status = open_the_outfile(dz))<0) {
        print_messages_and_close_sndfiles(exit_status,is_launched,dz);
        return(FAILED);
    }
    is_launched = TRUE;
    dz->bufcnt = 5;
    if((dz->sampbuf = (float **)malloc(sizeof(float *) * (dz->bufcnt+1)))==NULL) {
        sprintf(errstr,"INSUFFICIENT MEMORY establishing sample buffers.\n");
        return(MEMORY_ERROR);
    }
    if((dz->sbufptr = (float **)malloc(sizeof(float *) * dz->bufcnt))==NULL) {
        sprintf(errstr,"INSUFFICIENT MEMORY establishing sample buffer pointers.\n");
        return(MEMORY_ERROR);
    }
    for(n = 0;n <dz->bufcnt; n++)
        dz->sampbuf[n] = dz->sbufptr[n] = (float *)0;
    dz->sampbuf[n] = (float *)0;

    if((exit_status = create_rotor_sndbufs(dz))<0) {
        print_messages_and_close_sndfiles(exit_status,is_launched,dz);
        return(FAILED);
    }
    //param_preprocess ....
    if((exit_status = rotor_param_preprocess(dz))<0) {
        print_messages_and_close_sndfiles(exit_status,is_launched,dz);
        return(FAILED);
    }
    //spec_process_file =
    if((exit_status = rotor(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 has_extension = 0;
    char *filename = (*cmdline)[0], *p;
    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);
        }
    }
    p = filename + strlen(filename);
    p--;
    while(p != filename) {
        if(*p == '.') {
            has_extension = 1;
            break;
        }
        p--;
    }
    strcpy(dz->outfilename,filename);
    if(!has_extension)
        strcat(dz->outfilename,".wav");
    (*cmdline)++;
    (*cmdlinecnt)--;
    return(FINISHED);
}

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

int open_the_outfile(dataptr dz)
{
    int exit_status;
    if(dz->is_stereo)
        dz->infile->channels = 2;
    if((exit_status = create_sized_outfile(dz->outfilename,dz))<0)
        return(exit_status);
    return(FINISHED);
}

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

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

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

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

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

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

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

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

/************************* SETUP_ROTOR_APPLICATION *******************/

int setup_rotor_application(dataptr dz)
{
    int exit_status;
    aplptr ap;

    if((exit_status = establish_application(dz))<0)     // GLOBAL
        return(FAILED);
    ap = dz->application;
    // SEE parstruct FOR EXPLANATION of next 2 functions
    if(dz->mode == 0)
        exit_status = set_param_data(ap,ROTORDAT,9,9,"iDDDIIddD");
    else
        exit_status = set_param_data(ap,ROTORDAT,9,8,"iDDDIIdd0");
    if(exit_status<0)
        return(FAILED);
    if((exit_status = set_vflgs(ap,"d",1,"d","s",1,0,"0"))<0)
        return(FAILED);
    // set_legal_infile_structure -->
    dz->has_otherfile = FALSE;
    // assign_process_logic -->
    dz->input_data_type = SNDFILES_ONLY;
    dz->process_type    = UNEQUAL_SNDFILE;  
    dz->outfiletype     = SNDFILE_OUT;
    return application_init(dz);    //GLOBAL
}

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

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

/************************* SETUP_ROTOR_PARAM_RANGES_AND_DEFAULTS *******************/

int setup_rotor_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[ROT_CNT] = 3;
    ap->hi[ROT_CNT] = 127;
    ap->default_val[ROT_CNT] = 7;
    ap->lo[ROT_PMIN] = 0;
    ap->hi[ROT_PMIN] = 127;
    ap->default_val[ROT_PMIN] = 48;
    ap->lo[ROT_PMAX] = 0;
    ap->hi[ROT_PMAX] = 127;
    ap->default_val[ROT_PMAX] = 72;
    ap->lo[ROT_NSTEP]   = 0;
    ap->hi[ROT_NSTEP]   = 4;
    ap->default_val[ROT_NSTEP] = .1;
    ap->lo[ROT_PCYC]    = 4;
    ap->hi[ROT_PCYC]    = 256;
    ap->default_val[ROT_PCYC] = 16;
    ap->lo[ROT_TCYC]    = 4;
    ap->hi[ROT_TCYC]    = 256;
    ap->default_val[ROT_TCYC] = 16;
    ap->lo[ROT_PHAS]    = 0;
    ap->hi[ROT_PHAS]    = 1;
    ap->default_val[ROT_PHAS] = 0;
    ap->lo[ROT_DUR] = 1;
    ap->hi[ROT_DUR] = 32767;
    ap->default_val[ROT_DUR] = 20;
    if(dz->mode == 0) {
        ap->lo[ROT_GSTEP]   = .1;
        ap->hi[ROT_GSTEP]   = 60;
        ap->default_val[ROT_GSTEP] = 4;
    }
    ap->lo[ROT_DOVE]    = 0;
    ap->hi[ROT_DOVE]    = 5;
    ap->default_val[ROT_DOVE] = 0;
    dz->maxmode = 3;
    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_rotor_application(dz))<0)
                return(exit_status);
            //ap = dz->application;
            break;

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

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

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

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

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


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

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



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

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

void set_legal_infile_structure(dataptr dz)
{}

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

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

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

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

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

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


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

int usage1()
{
    usage2("rotor");
    return(USAGE_ONLY);
}

/**************************** CHECK_ROTOR_PARAM_VALIDITY_AND_CONSISTENCY *****************************/

int check_rotor_param_validity_and_consistency(dataptr dz)
{
    if(!dz->brksize[ROT_PMIN] && !dz->brksize[ROT_PMAX]) {
        if(flteq(dz->param[ROT_PMIN],dz->param[ROT_PMAX])) {
            sprintf(errstr,"Zero pitchrange (%lf to %lf) specified.\n",dz->param[ROT_PMIN],dz->param[ROT_PMAX]);
            return(DATA_ERROR);
        } else if(dz->param[ROT_PMIN] > dz->param[ROT_PMAX]) {
            fprintf(stdout,"WARNING: Inverted or pitchrange (%lf to %lf) specified.\n",dz->param[ROT_PMIN],dz->param[ROT_PMAX]);
            fflush(stdout);
        }
    }
    if(dz->vflag[0])
        dz->is_stereo = 1;
    else
        dz->is_stereo = 0;
    return FINISHED;
}

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

int get_the_process_no(char *prog_identifier_from_cmdline,dataptr dz)
{
    if(!strcmp(prog_identifier_from_cmdline,"rotor"))               dz->process = ROTOR;
    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,"rotor")) {
        fprintf(stderr,
        "USAGE:\n"
        "rotor rotor 1   fi fo env cnt minp maxp step prot trot phas dur gstp [-ddove] [-s]\n"
        "rotor rotor 2-3 fi fo env cnt minp maxp step prot trot phas dur [-ddove] [-s]\n"
        "\n"
        "Generate note-sets that grow and shrink in pitch-range and speed (and spatial-width).\n"
        "\n"
        "Mode 1: Note-set start-times determined by param \"gstp\".\n"
        "Mode 2: Next Note-set start-time, depends on spacings WITHIN current set.\n"
        "Mode 3: First event of next note-set overlaid on last event of previous set.\n"
        "\n"
        "FI     File to be read at different speeds to generate output events.\n"
        "       (should start and end at sample value 0.0, OR use \"dove\")\n"
        "FO     Output file(can be mono or stereo).\n"
        "ENV    Envelope to be imposed over output events.\n"
        "       Envelope duration determines duration of all events.\n"
        "CNT    Number of events in each (changing) set (Range 3 to 127).\n"
        "MINP   Minimum (MIDI) pitch of events (Range 0 to 127).\n"
        "MAXP   Maximum (MIDI) pitch of events (Range 0 to 127).\n"
        "STEP   Maximum timestep between event-onsets (Range 0 to 4 secs).\n"
        "PROT   Number of notesets before pitch-sequence returns to orig (Range 4 to 256).\n"
        "TROT   Number of speeds, before speed returns to original (Range 4 to 256).\n"
        "PHAS   Initial phase difference between prot and trot (range 0 - 1).\n"
        "DUR    Duration of output to generate (Range 1 to 32767).\n"
        "GSTP   (Mode 1 only) timestep between each note-group (Range 1 to 60).\n"
        "DOVE   Size (mS) of start/end dovetails of insound  (Range 0 to 5).\n"
        "\n"
        "-s     Stereo output: output grows and shrinks in spatial width.\n");
    } else
        fprintf(stdout,"Unknown option '%s'\n",str);
    return(USAGE_ONLY);
}

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

/****************************** 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 envelope 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 > 1.0 || dummy < 0.0) {
                sprintf(errstr,"Found envelope value (%lf) out of range (0 to 1) 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(cnt < 4) {
        sprintf(errstr,"Insufficient data found in file %s : Needs at least 2 time-value pairs.\n",str);
        return(DATA_ERROR);
    }
    dz->frametime = (float)lasttime;                                    //  Remember duration of envelope
    dz->rampbrksize = (int)round(dz->frametime * dz->infile->srate);    //  Remember duration of envelope in samples

    if((dz->parray = (double **)malloc(sizeof(double *)))==NULL) {
        sprintf(errstr,"INSUFFICIENT MEMORY to store transposition data.\n");
        return(MEMORY_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;
}

/*************************** CREATE_ROTOR_SNDBUFS **************************/

int create_rotor_sndbufs(dataptr dz)
{
    int n, exit_status;
    int bigbufsize, inbufsize, evbufsize, maxrotstepsamps, maxrotcnt;
    double maxrotstep, maxrotcntd;
    if(dz->sbufptr == 0 || dz->sampbuf==0) {
        sprintf(errstr,"buffer pointers not allocated: create_sndbufs()\n");
        return(PROGRAM_ERROR);
    }
    if(dz->brksize[ROT_NSTEP]) {
        if((exit_status = get_maxvalue_in_brktable(&maxrotstep,ROT_NSTEP,dz))<0)
            return exit_status;
    } else 
        maxrotstep = dz->param[ROT_NSTEP];
    if(dz->brksize[ROT_CNT]) {                                                  //  Output may baktrak, noteset to noteset
        if((exit_status = get_maxvalue_in_brktable(&maxrotcntd,ROT_CNT,dz))<0)
            return exit_status;
        maxrotcnt = (int)round(maxrotcntd);
    } else 
        maxrotcnt = dz->iparam[ROT_CNT];
    maxrotstepsamps = (int)ceil(maxrotstep * dz->infile->srate);                // maximum size of note
    dz->buflen = maxrotcnt * maxrotstepsamps;                                   // maximum size of noteset
    if(dz->is_stereo)
        dz->buflen *= 2;
    inbufsize = dz->insams[0] + 1;  //  Add wrap-around point

    evbufsize = dz->rampbrksize;    //  Store size of envelope, in samples
    evbufsize += 2;                 //  1 for wraparound, 1 for safety!!

    if(dz->is_stereo)
        bigbufsize = inbufsize + (evbufsize * 4) + (dz->buflen * 2); // In mode 0, may need to baktrak, but never more than 1 complete (max)setlen
    else
        bigbufsize = inbufsize + (evbufsize * 3) + (dz->buflen * 2);    //  Need space for outbuf & overflowbuf
    if((dz->bigbuf = (float *)malloc(bigbufsize * sizeof(float))) == NULL) {
        sprintf(errstr,"INSUFFICIENT MEMORY to create sound buffers.\n");
        return(PROGRAM_ERROR);
    }

    // MONO
    //    obuf      ovflwbuf            eventbuf          envelopebuf       inbuf
    //      0           1                   2                 3               4
    //  |-------|------------------|------------------|------------------|------------|
    //          
    //   buflen      evbufsize          evbufsize           evbufsize       insams[0]
    //                
    // STEREO                 
    //    obuf              ovflwbuf                    eventbuf          envelopebuf         inbuf
    //      0                   1                           2                 3                 4
    //  |-------|------------------------------------|------------------|------------------|------------|
    //   buflen         evbufsize * 2                   evbufsize           evbufsize       insams[0]
    //
    //
    n = 0;
    dz->sbufptr[n] = dz->sampbuf[n] = dz->bigbuf;                    
    n++;                                                             // 0 = Output buffer
    dz->sbufptr[n] = dz->sampbuf[n] = dz->sampbuf[n-1] + (dz->buflen * 2); //   size buflen * 2
    n++;                                                             // 1 = overflow buffer
    if(dz->is_stereo)                                                //         size evbufsize * outchans
        dz->sbufptr[n] = dz->sampbuf[n] = dz->sampbuf[n-1] + (evbufsize * 2);
    else
        dz->sbufptr[n] = dz->sampbuf[n] = dz->sampbuf[n-1] + evbufsize;  // 2 = created event
    n++;                                                             //         size evbufsize
    dz->sbufptr[n] = dz->sampbuf[n] = dz->sampbuf[n-1] + evbufsize;  // 3 = envelope of event
    n++;                                                             //         size evbufsize
    dz->sbufptr[n] = dz->sampbuf[n] = dz->sampbuf[n-1] + evbufsize;  // 4 = insndbuf
    return(FINISHED);
}

/************************************* ROTOR_PARAM_PREPROCESS ***********************************
 *
 * (1)  Read input file to buffer, withg wraparound point, for reading as a waveform table.
 * (2)  Convert input envelope to a sample scale array in another buffer.
 */

int rotor_param_preprocess(dataptr dz) 
{
    int exit_status;
    double *env = dz->parray[0];
    int n, m;
    double srate = (double)dz->infile->srate, val, thistime;
    int origbuflen = dz->buflen, nextind, dovecnt;
    float *ibuf = dz->sampbuf[4];
    float *ebuf = dz->sampbuf[3];
    dz->buflen = dz->insams[0];                     //  Read input sound to ibuf
    if((exit_status = read_samps(ibuf,dz))<0)
        return(exit_status);
    if(dz->param[ROT_DOVE] > 0) {
        dovecnt = (int)round(dz->param[ROT_DOVE] * MS_TO_SECS * dz->infile->srate);
        if(dovecnt * 2 >= dz->buflen) {
            sprintf(errstr,"Dovetails too large for input sound.\n");
            return DATA_ERROR;
        }
        for(n= 0;n < dovecnt; n++) {                //  Dovetail start
            val = (double)n/(double)dovecnt;
            ibuf[n] = (float)(ibuf[n] * val);
        }                                           //  Dovetail end
        for(n= dz->buflen - 1,m = 0;m < dovecnt; n--,m++) {
            val = (double)m/(double)dovecnt;
            ibuf[n] = (float)(ibuf[n] * val);
        }
    }
    ibuf[dz->buflen] = 0;                           //  Wrap-around zero-point
    dz->buflen = origbuflen;

    nextind = 2;                                    //  Read input envelope array into a sample-scale array in a buffer
    for(n = 0; n < dz->rampbrksize; n++) {
        thistime = (double)n/srate;
        if((exit_status = read_value_from_brkarray(env,&nextind,&val,thistime,dz))<0)
            return exit_status;
        ebuf[n] = (float)val;
    }
    ebuf[n] = 0.0f;                             //  Wrap-around zero point
    return FINISHED;
}

/**************************** READ_VALUE_FROM_BRKARRAY *****************************/

int read_value_from_brkarray(double *env,int *nextind,double *val,double time,dataptr dz)
{
    double thistim, nexttim, thisval, nextval, valdiff, timdiff, timfrac;
    nexttim = env[*nextind];
    while(time > nexttim) {
        if((*nextind += 2) >= dz->itemcnt) {
            sprintf(errstr, "Overshot end of envelope brktable while converting to sample-buffer.\n");
            return PROGRAM_ERROR;
        }
        nexttim = env[*nextind];
    }
    thistim = env[*nextind - 2];
    thisval = env[*nextind - 1];
    nextval = env[*nextind + 1];
    valdiff = nextval - thisval;
    timdiff = nexttim - thistim;
    timfrac = (time - thistim)/timdiff;
    valdiff *= timfrac;
    *val = thisval + valdiff;
    return FINISHED;
}

/**************************** ROTOR *****************************/

int rotor(dataptr dz) 
{
    int exit_status, pitch_orient = 1;
    int obufpos, ovflwsize;
    float *obuf = dz->sampbuf[0];
    int stepcnt, notecnt = dz->iparam[ROT_CNT], kk, tsets_per_cycle;    //  If there are 5 positions before line returns to orig position.
    double drotspeed, protspeed, maxtime, duration, maxrange, centre, total_time, local_time, line_angle, p_line_angle;
    double pitchrange, halfrange, rangebot, thispitch, timestep, thispos, normaliser = 0.0;
    int m, n;
    int tabsize = dz->insams[0];
    double tabincr = (double)tabsize/(double)dz->infile->srate; //  tabincr to read table once per second, i.e. at 1Hz
    int ochans = 1;
    if(dz->is_stereo)
        ochans++;
    ovflwsize = dz->rampbrksize * ochans;
    stepcnt = notecnt - 1;                  //  e.g. with 5 notes, there are 4 gaps
    duration = dz->param[ROT_DUR];          //  Total duration of output

    dz->tempsize = (int)round(duration * dz->infile->srate) * ochans;   //  Establish scale for loom progress_bar

    //  INITIALISE CONSTANTS
    for(kk=0;kk<2;kk++) {
        memset((char *)obuf,0,((dz->buflen * 2) + ovflwsize) * sizeof(float));
        obufpos = 0;
        total_time = 0.0;
        line_angle = 0.0;
        dz->total_samps_written = 0;
        if(kk == 0)
            time_display(dz->total_samps_written,dz);
        p_line_angle = dz->iparam[ROT_PHAS] * TWOPI;    //  Set initla phase of pitch-rotor

        if(dz->brksize[ROT_TCYC]) {
            if((exit_status = read_value_from_brktable(total_time,ROT_TCYC,dz))<0)
                return(exit_status);
        }
        tsets_per_cycle = dz->iparam[ROT_TCYC];         //  If there are 5 positions before line returns to orig position.
        drotspeed= 1.0/tsets_per_cycle;                 //  then there is (r=)1/5th of a rotation per line-set.
        drotspeed *= TWOPI;                             //  Convert to radians.
        if(dz->brksize[ROT_PCYC]) {
            if((exit_status = read_value_from_brktable(total_time,ROT_PCYC,dz))<0)
                return(exit_status);
        }
        protspeed = 1.0/dz->iparam[ROT_PCYC];           //  How much of a cycle per note-set
        protspeed *= TWOPI;                             //  Convert to radians.

        if(dz->brksize[ROT_PMAX]) {
            if((exit_status = read_value_from_brktable(total_time,ROT_PMAX,dz))<0)
                return(exit_status);
        }
        if(dz->brksize[ROT_PMIN]) {
            if((exit_status = read_value_from_brktable(total_time,ROT_PMIN,dz))<0)
                return(exit_status);
        }
        maxrange = dz->param[ROT_PMAX] - dz->param[ROT_PMIN];
        centre   = dz->param[ROT_PMIN] + maxrange/2.0;  //  Set initial pitch-range params

        if(dz->brksize[ROT_NSTEP]) {
            if((exit_status = read_value_from_brktable(total_time,ROT_NSTEP,dz))<0)
                return(exit_status);
        }
        maxtime = dz->param[ROT_NSTEP];                 //  Set initial maximum timestep between notes.
        
        if(kk == 0) {
            fprintf(stdout,"INFO: Checking output level.\n");
            fflush(stdout);
        } else {
            if(sloom)
                fprintf(stdout,"INFO: Writing output.\n");
            else
                fprintf(stdout,"\nINFO: Writing output.\n");
            fflush(stdout);
        }

        while(total_time < duration) {
            for(m = 0; m < tsets_per_cycle;m++) {
                local_time = 0.0;
                timestep = fabs(maxtime * cos(line_angle));         //  Time-step to next event when line is tilted at angle
                pitchrange = maxrange * sin(p_line_angle);          //  Range shrunk (or inverted) by sin-function.
                halfrange = pitchrange/2.0;                         //  If inverted, halfrange is -ve
                halfrange *= pitch_orient;                          //  Inverts range on passing through 2PI
                rangebot = centre - halfrange;                      //  and "rangebot" is at top
                for(n = 0;n < stepcnt; n++) {

                    //  CACULATE PITCH OF EVENT FROM ROTATING ARM, AND POSITION ON ARM
                    
                    thispos   = (double)n/(double)stepcnt;          //  relative position in range (normalised 0-1)
                    thispitch  = thispos * pitchrange;              //  but "thispitch" here is -ve
                    thispitch *= pitch_orient;
                    thispitch += rangebot;                          //  So true pitch is subtracted from top of range

                    //  WRITE OUTPUT EVENT
                    
                    if(kk == 0) {
                        if((exit_status = get_event_level(total_time+local_time,thispitch,tabincr,tabsize,&obufpos,&normaliser,line_angle,thispos,dz))<0)   //  Check output level
                            return exit_status;
                    } else {
                        if((exit_status = write_event(total_time+local_time,thispitch,tabincr,tabsize,&obufpos,normaliser,line_angle,thispos,dz))<0) // Write all events except last
                            return exit_status;
                    }

                    //  ADVANCE TIME, VIA TIME-ROTATOR

                    local_time += timestep;
                }

                //  WRITE FINAL EVENT OF TIME-SET

                thispos   = (double)n/(double)stepcnt;
                thispitch = thispos * pitchrange;
                thispitch *= pitch_orient;
                thispitch += rangebot;
                if(kk == 0) {
                    if((exit_status = get_event_level(total_time+local_time,thispitch,tabincr,tabsize,&obufpos,&normaliser,line_angle,thispos,dz))<0)   //  Check output level
                        return exit_status;
                } else {
                    if((exit_status = write_event(total_time+local_time,thispitch,tabincr,tabsize,&obufpos,normaliser,line_angle,thispos,dz))<0)    //  Write last_event
                        return exit_status;
                }

                //  AT END OF A COMPLETE SET, Read any time-varying params

                //  PITCH ROTOR CONTINUES TO ROTATE

                p_line_angle += protspeed;                          //  Advance pitch-rotator angle
                if(p_line_angle >= TWOPI) {                         //  If pitchrotor cycle completed
                    if(dz->brksize[ROT_PCYC]) {
                        if((exit_status = read_value_from_brktable(total_time,ROT_PCYC,dz))<0)
                            return(exit_status);
                        protspeed = 1.0/dz->iparam[ROT_PCYC];       //  How much of a cycle per note-set
                        protspeed *= TWOPI;                         //  Convert to radians.
                    }
                    p_line_angle -= TWOPI;
                    pitch_orient = -pitch_orient;
                }
                if(p_line_angle < PI/2.0 || p_line_angle >= 3 * PI/2.0)
                    pitch_orient = 1;
                else
                    pitch_orient = -1;

                //  Update any (other) timer-varying params, at end of a noteset
                
                if(dz->brksize[ROT_PMIN] || dz->brksize[ROT_PMAX]) {
                    if(dz->brksize[ROT_PMIN]) {
                        if((exit_status = read_value_from_brktable(total_time,ROT_PMIN,dz))<0)
                            return(exit_status);
                    }
                    if(dz->brksize[ROT_PMAX]) {
                        if((exit_status = read_value_from_brktable(total_time,ROT_PMAX,dz))<0)
                            return(exit_status);
                    }
                    maxrange = dz->param[ROT_PMAX] - dz->param[ROT_PMIN];
                    centre   = dz->param[ROT_PMIN] + maxrange/2.0;
                }
                if(dz->brksize[ROT_NSTEP]) {
                    if((exit_status = read_value_from_brktable(total_time,ROT_NSTEP,dz))<0)
                        return(exit_status);
                    maxtime = dz->param[ROT_NSTEP];
                }

                if(dz->brksize[ROT_TCYC]) {
                    if((exit_status = read_value_from_brktable(total_time,ROT_TCYC,dz))<0)
                        return(exit_status);
                    //  Cannot alter the tsets_per_cycle inside this loop (do it after exiting loop, below)
                    drotspeed= 1.0/dz->iparam[ROT_TCYC];
                    drotspeed *= TWOPI;
                }
                if((line_angle += drotspeed) >= TWOPI)
                    line_angle -= TWOPI;

                //  locate start of next TSET

                switch(dz->mode) {
                case(0):
                    if(dz->brksize[ROT_GSTEP]) {
                        if((exit_status = read_value_from_brktable(total_time,ROT_GSTEP,dz))<0)
                            return(exit_status);
                    }                                               //  Get step to next note-set as input param
                    total_time += dz->param[ROT_GSTEP];
                    break;
                case(1):                                            //  All events have already been written
                    total_time += local_time + timestep;
                    break;
                case(2):                                            //  Keep group time where last group was placed
                    total_time += local_time;
                    break;                                          //  (1st event of next set superimposed on last event this set) 
                }
                if(total_time >= duration)
                    break;
            }

            //  Add the end of a complete rotation of groups-of-notesets, read any time-varying time-rotation data
            
            if(dz->brksize[ROT_TCYC]) {
                if((exit_status = read_value_from_brktable(total_time,ROT_TCYC,dz))<0)
                    return(exit_status);
                tsets_per_cycle = dz->iparam[ROT_TCYC];
                //  We already know drotspeed from reading table above
            }
        }
        if(kk == 0) {
            if(obufpos > 0) {
                for(n=0;n<obufpos;n++) {
                    if(fabs(obuf[n]) > normaliser)
                        normaliser = fabs(obuf[n]);
                }
            }
            normaliser = 0.95/normaliser;
        } else {
            if(obufpos > 0) {
                if(normaliser < 1.0) {
                    for(n=0;n<obufpos;n++)
                        obuf[n] = (float)(obuf[n] * normaliser);
                }
                if((exit_status = write_rotor_samps(obuf,obufpos,dz))<0)
                    return(exit_status);
            }
        }
    }
    return FINISHED;
}

/******************************************* WRITE_EVENT *******************************/

int write_event(double time,double thispitch,double tabincr,int tabsize,int *obufpos,double normaliser,double line_angle,double pos,dataptr dz)
{
    int exit_status;
    float *obuf  = dz->sampbuf[0];
    float *nbuf = dz->sampbuf[2];
    float *ebuf = dz->sampbuf[3];               //  Create envelope of length of required event, at srate
    float *ibuf = dz->sampbuf[4];
    double frq = miditohz(thispitch);
    int eventsamps = dz->rampbrksize,n,k,ovflwsize;
    double tabpos = 0.0, frac, diff, relpos, reldist, temp, lpos, rpos,thisval;
    int thispos, nextpos, bufpos;
    int ochans = 1;

    if(dz->is_stereo)
        ochans++;
    ovflwsize = dz->rampbrksize * ochans;
    tabincr *= frq;                             //  Frq-related table-read increment
    for(n = 0; n< eventsamps;n++) {
        thispos = (int)floor(tabpos);           //  Read input sample by interpolation
        nextpos = thispos+1;                    //  with incr determined by pitch/frq
        frac = tabpos - thispos;
        diff =  ibuf[nextpos] - ibuf[thispos];
        diff *= frac;
        thisval = ibuf[thispos] + diff;
        nbuf[n] = (float)(thisval * ebuf[n]);   //  Scale by input envelope
        tabpos += tabincr;
        if(tabpos >= tabsize)
            tabpos -= tabsize;
    }
    bufpos = (int)round(time * dz->infile->srate) * ochans;
    bufpos -= dz->total_samps_written;
    while(bufpos >= (dz->buflen * 2) + ovflwsize) {     //  In case bufpos jumps ahead beyond buffer
        if(normaliser < 1.0) {                  //  Only write (1) buflen if we've also filled the overflow buffer
            for(k=0;k<dz->buflen;k++)   {       //  so that we can potentially backtrack over the buflen
                obuf[k] = (float)(obuf[k] * normaliser);
            }
        }
        if((exit_status = write_rotor_samps(obuf,dz->buflen,dz))<0)
            return(exit_status);
        memcpy((char *)obuf,(char *)(obuf+dz->buflen),(ovflwsize + dz->buflen) * sizeof(float));
        memset((char *)(obuf + dz->buflen + ovflwsize),0,dz->buflen * sizeof(float));
        bufpos -= dz->buflen;
    }

    if(dz->is_stereo) {         //  Change position range from (normalised) 0 to 1
        pos *= 2.0;             //  to 0 to 2
        pos -= 1.0;             //  to -1 to +1
        pos *= cos(line_angle); // Scale according to line angle : (-1 to 1) at cos(0)==1    --> (-1 to 1)
        if(pos < 0)             //                                 (-1 to 1) at cos(PI/2)==0 --> (0 to 0)  squeezed to centre
            relpos = -pos;      //                                 (-1 to 1) at cos(PI)==-1  --> (1 to -1) range inverted : ETC
        else                    //  Do hole-in-middle compensation
            relpos = pos;
        temp = 1.0 + (relpos * relpos); 
        reldist = ROOT2 / sqrt(temp);
        temp = (pos + 1.0) / 2.0;
        rpos = temp * reldist;
        lpos = (1.0 - temp ) * reldist;

        for(n = 0; n< eventsamps;n++) {         //  Add new event into output stream
            if(bufpos >= (dz->buflen * 2) + ovflwsize) {
                if(normaliser < 1.0) {
                    for(k=0;k<dz->buflen;k++) {
                        obuf[k] = (float)(obuf[k] * normaliser);
                    }
                }
                if((exit_status = write_rotor_samps(obuf,dz->buflen,dz))<0)
                    return(exit_status);
                memcpy((char *)obuf,(char *)(obuf+dz->buflen),(ovflwsize + dz->buflen) * sizeof(float));
                memset((char *)(obuf + dz->buflen + ovflwsize),0,dz->buflen * sizeof(float));
                bufpos -= dz->buflen;
            }
            obuf[bufpos] = (float)(obuf[bufpos] + (nbuf[n] * lpos));
            bufpos++;
            obuf[bufpos] = (float)(obuf[bufpos] + (nbuf[n] * rpos));
            bufpos++;
        }

    } else {
        for(n = 0; n< eventsamps;n++) {                 //  Add new event into output stream
            if(bufpos >= (dz->buflen * 2) + ovflwsize) {
                if(normaliser < 1.0) {
                    for(k=0;k<dz->buflen;k++)
                        obuf[k] = (float)(obuf[k] * normaliser);
                }
                if((exit_status = write_rotor_samps(obuf,dz->buflen,dz))<0)
                    return(exit_status);
                memcpy((char *)obuf,(char *)(obuf+dz->buflen),(ovflwsize + dz->buflen) * sizeof(float));
                memset((char *)(obuf + dz->buflen + ovflwsize),0,dz->buflen * sizeof(float));
                bufpos -= dz->buflen;
            }
            obuf[bufpos] = (float)(obuf[bufpos] + nbuf[n]);
            bufpos++;
        }
    }
    *obufpos = bufpos;
    return FINISHED;
}

/******************************************* GET_EVENT_LEVEL *******************************/

int get_event_level(double time,double thispitch,double tabincr,int tabsize,int *obufpos,double *normaliser,double line_angle,double pos,dataptr dz)
{
    float *obuf  = dz->sampbuf[0];
    float *nbuf = dz->sampbuf[2];
    float *ebuf  = dz->sampbuf[3];                  //  Create envelope of length of required event, at srate
    float *ibuf  = dz->sampbuf[4];
    double frq = miditohz(thispitch);
    int eventsamps = dz->rampbrksize,n,k, ovflwsize;
    double tabpos = 0.0, frac, diff, thisval, relpos, temp, reldist, rpos,lpos;
    int thispos, nextpos, bufpos;
    int ochans = 1;
    if(dz->is_stereo)
        ochans++;
    ovflwsize = dz->rampbrksize * ochans;
    tabincr *= frq;                                 //  Frq-related table-read increment
    for(n = 0; n< eventsamps;n++) {
        thispos = (int)floor(tabpos);               //  Read input sample by interpolation
        nextpos = thispos+1;                        //  with incr determined by pitch/frq
        frac = tabpos - thispos;
        diff =  ibuf[nextpos] - ibuf[thispos];
        diff *= frac;
        thisval = ibuf[thispos] + diff;
        nbuf[n] = (float)(thisval * ebuf[n]);       //  Scale by input envelope
        tabpos += tabincr;
        if(tabpos >= tabsize)
            tabpos -= tabsize;
    }
    bufpos = (int)round(time * dz->infile->srate) * ochans;
    bufpos -= dz->total_samps_written;

    while(bufpos >= (dz->buflen * 2) + ovflwsize) {     //  In case bufpos jumps ahead beyond buffer
        for(k=0;k<dz->buflen;k++) {
            if(fabs(obuf[k]) > *normaliser)
                *normaliser = fabs(obuf[k]);
        }
        dz->total_samps_written += dz->buflen;
        time_display(dz->total_samps_written,dz);
        memcpy((char *)obuf,(char *)(obuf+dz->buflen),(ovflwsize + dz->buflen) * sizeof(float));
        memset((char *)(obuf + dz->buflen + ovflwsize),0,dz->buflen * sizeof(float));
        bufpos -= dz->buflen;
    }
    if(dz->is_stereo) {
        pos *= 2.0;             //  to 0 to 2
        pos -= 1.0;             //  to -1 to +1
        pos *= cos(line_angle); // Scale according to line angle : (-1 to 1) at cos(0)==1    --> (-1 to 1)
        if(pos < 0)             //                                 (-1 to 1) at cos(PI/2)==0 --> (0 to 0)  squeezed to centre
            relpos = -pos;      //                                 (-1 to 1) at cos(PI)==-1  --> (1 to -1) range inverted : ETC
        else                    //  Do hole-in-middle compensation
            relpos = pos;
        temp = 1.0 + (relpos * relpos); 
        reldist = ROOT2 / sqrt(temp);
        temp = (pos + 1.0) / 2.0;
        rpos = temp * reldist;
        lpos = (1.0 - temp ) * reldist;
        for(n = 0; n< eventsamps;n++) {                 //  Add new event into output stream
            if(bufpos >= (dz->buflen * 2) + ovflwsize) {
                for(k=0;k<dz->buflen;k++) {
                    if(fabs(obuf[k]) > *normaliser)
                        *normaliser = fabs(obuf[k]);
                }
                dz->total_samps_written += dz->buflen;
                time_display(dz->total_samps_written,dz);
                memcpy((char *)obuf,(char *)(obuf+dz->buflen),(ovflwsize + dz->buflen) * sizeof(float));
                memset((char *)(obuf + dz->buflen + ovflwsize),0,dz->buflen * sizeof(float));
                bufpos -= dz->buflen;
            }
            obuf[bufpos] = (float)(obuf[bufpos] + (nbuf[n] * lpos));
            bufpos++;
            obuf[bufpos] = (float)(obuf[bufpos] + (nbuf[n] * rpos));
            bufpos++;
        }
    } else {
        for(n = 0; n< eventsamps;n++) {                 //  Add new event into output stream
            if(bufpos >= (dz->buflen * 2) + ovflwsize) {
                for(k=0;k<dz->buflen;k++) {
                    if(fabs(obuf[k]) > *normaliser)
                        *normaliser = fabs(obuf[k]);
                }
                dz->total_samps_written += dz->buflen;
                time_display(dz->total_samps_written,dz);
                memcpy((char *)obuf,(char *)(obuf+dz->buflen),(ovflwsize + dz->buflen) * sizeof(float));
                memset((char *)(obuf + dz->buflen + ovflwsize),0,dz->buflen * sizeof(float));
                bufpos -= dz->buflen;
            }
            obuf[bufpos] = (float)(obuf[bufpos] + nbuf[n]);
            bufpos++;
        }
    }
    *obufpos = bufpos;
    return FINISHED;
}

/******************************* TIME_DISPLAY **************************/

void time_display(int samps_sent,dataptr dz)
{
    if(sloom)
        dz->process = MTOS;
    display_virtual_time(samps_sent,dz);
    if(sloom)
        dz->process = ROTOR;
}

/******************************* WRITE_ROTOR_SAMPS **************************/

int write_rotor_samps(float *obuf,int samps_sent,dataptr dz)
{
    int exit_status;
    if(sloom)               //  Ensures correct setting of progress bar
        dz->process = MTOS;
    if((exit_status = write_samps(obuf,samps_sent,dz))<0)
        return(exit_status);
    if(sloom)
        dz->process = ROTOR;
    return FINISHED;
}