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

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

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

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



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

#define SIGNAL_TO_LEFT  (0)
#define SIGNAL_TO_RIGHT (1)
#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 = "7.1.0";

//CDP LIB REPLACEMENTS
static int check_panorama_param_validity_and_consistency(dataptr dz);
static int setup_panorama_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_panorama_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 handle_the_special_data(char *str,dataptr dz);
static int panorama(dataptr dz);
static void pancalc(double position,double *leftgain,double *rightgain);
static int panorama_param_preprocess(dataptr dz);

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

int main(int argc,char *argv[])
{
    int exit_status;
    dataptr dz = NULL;
    char **cmdline;
    int  cmdlinecnt;
//    aplptr ap;
    int is_launched = FALSE;
    if(argc==2 && (strcmp(argv[1],"--version") == 0)) {
        fprintf(stdout,"%s\n",cdp_version);
        fflush(stdout);
        return 0;
    }
                        /* CHECK FOR SOUNDLOOM */
    if((sloom = sound_loom_in_use(&argc,&argv)) > 1) {
        sloom = 0;
        sloombatch = 1;
    }
    if(sflinit("cdp")){
        sfperror("cdp: initialisation\n");
        return(FAILED);
    }
                          /* SET UP THE PRINCIPLE DATASTRUCTURE */
    if((exit_status = establish_datastructure(&dz))<0) {                    // CDP LIB
        print_messages_and_close_sndfiles(exit_status,is_launched,dz);
        return(FAILED);
    }
    if(!sloom) {
        if(argc == 1) {
            usage1();   
            return(FAILED);
        } else if(argc == 2) {
            usage2(argv[1]);    
            return(FAILED);
        }
    }
    if(!sloom) {
        if((exit_status = make_initial_cmdline_check(&argc,&argv))<0) {     // CDP LIB
            print_messages_and_close_sndfiles(exit_status,is_launched,dz);
            return(FAILED);
        }
        cmdline    = argv;
        cmdlinecnt = argc;
        if((get_the_process_no(argv[0],dz))<0)
            return(FAILED);
        cmdline++;
        cmdlinecnt--;
        dz->maxmode = 2;
        if((get_the_mode_from_cmdline(cmdline[0],dz))<0) {
            print_messages_and_close_sndfiles(exit_status,is_launched,dz);
            return(FAILED);
        }
        cmdline++;
        cmdlinecnt--;
        // setup_particular_application =
        if((exit_status = setup_panorama_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;
    if(dz->infilecnt < 2) {
        sprintf(errstr,"Process  only works with more than one input file\n");
        exit_status = print_messages_and_close_sndfiles(exit_status,is_launched,dz);
        return(exit_status);         
    }
/* TEST */
fprintf(stderr,"555 dz->infilecnt = %d\n",dz->infilecnt);
/* TEST */
    // parse_infile_and_hone_type() = 
    dz->process = MIXDUMMY;
    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);
    }
    dz->process = PANORAMA;
    // setup_param_ranges_and_defaults() =
    if((exit_status = setup_panorama_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++;
    dz->process = MIXDUMMY;
    if((exit_status = handle_extra_infiles(&cmdline,&cmdlinecnt,dz))<0) {
        print_messages_and_close_sndfiles(exit_status,is_launched,dz);      
        return(FAILED);
    }
    dz->process = PANORAMA;
/* TEST */
fprintf(stderr,"999 cmdline[0] = %s\n",cmdline[0]);
/* TEST */
    // handle_outfile() = 
    if((exit_status = handle_the_outfile(&cmdlinecnt,&cmdline,dz))<0) {
        print_messages_and_close_sndfiles(exit_status,is_launched,dz);
        return(FAILED);
    }
/* TEST */
fprintf(stderr,"AAA cmdline[0] = %s\n",cmdline[0]);
/* TEST */

//  handle_formants()           redundant
//  handle_formant_quiksearch() redundant
    if(dz->mode == 1) {
        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++;
    }
/* TEST */
fprintf(stderr,"BBB\n");
/* TEST */
    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);
    }
/* TEST */
fprintf(stderr,"CCC\n");
/* TEST */
//  check_param_validity_and_consistency....
    if((exit_status = check_panorama_param_validity_and_consistency(dz))<0) {
        print_messages_and_close_sndfiles(exit_status,is_launched,dz);
        return(FAILED);
    }
    is_launched = TRUE;
    if((exit_status = panorama_param_preprocess(dz))<0) {
        print_messages_and_close_sndfiles(exit_status,is_launched,dz);
        return(FAILED);
    }
    //process_file =
    if((exit_status = panorama(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], *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;
    while(*p != ENDOFSTR) {
        if(*p == '.') {
            *p = ENDOFSTR;
            break;
        }
        p++;
    }
    strcpy(dz->outfilename,filename);      
    if(!sloom)
        strcat(dz->outfilename,".mmx");
    if((exit_status = create_sized_outfile(dz->outfilename,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_PANORAMA_APPLICATION *******************/

int setup_panorama_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 == 1) {
        if((exit_status = set_param_data(ap,PANOLSPKRS,5,3,"00ddi"))<0)
            return(FAILED);
    } else {
        if((exit_status = set_param_data(ap,0,5,5,"idddi"))<0)
            return(FAILED);
    }
    if((exit_status = set_vflgs(ap,"r",1,"d","pq",2,0,"00"))<0)
        return(FAILED);
    // set_legal_infile_structure -->
    dz->has_otherfile = FALSE;
    // assign_process_logic -->
    dz->input_data_type = MANY_SNDFILES;
    dz->process_type    = TO_TEXTFILE;  
    dz->outfiletype     = TEXTFILE_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);
    }
    dz->all_words = 0;
    if((exit_status = store_filename(cmdline[0],dz))<0)
        return(exit_status);
    return(FINISHED);
}

/************************* SETUP_PANORAMA_PARAM_RANGES_AND_DEFAULTS *******************/

int setup_panorama_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 == 0) {
        ap->lo[PANO_LCNT]   = 3.0;
        ap->hi[PANO_LCNT]   = 16.0;
        ap->default_val[PANO_LCNT]  = 8;
        ap->lo[PANO_LWID]   = 190.0;
        ap->hi[PANO_LWID]   = 360.0;
        ap->default_val[PANO_LWID]  = 360;
    }
    ap->lo[PANO_SPRD]   = 0.0;
    ap->hi[PANO_SPRD]   = 360.0;
    ap->default_val[PANO_SPRD]  = 360;
    ap->lo[PANO_OFST]   = -180;
    ap->hi[PANO_OFST]   = 180;
    ap->default_val[PANO_OFST] = 0;
    ap->lo[PANO_CNFG]   = 1;
    ap->hi[PANO_CNFG]   = 128;
    ap->default_val[PANO_CNFG] = 1;
    ap->lo[PANO_RAND]   = 0;
    ap->hi[PANO_RAND]   = 1;
    ap->default_val[PANO_RAND] = 0;
    dz->maxmode = 2;
    if(!sloom)
        put_default_vals_in_all_params(dz);
    return(FINISHED);
}

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

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

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

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

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

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

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

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

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


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

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



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

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

void set_legal_infile_structure(dataptr dz)
{}

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

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

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

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

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

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


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

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

/**************************** CHECK_PANORAMA_PARAM_VALIDITY_AND_CONSISTENCY *****************************/

int check_panorama_param_validity_and_consistency(dataptr dz)
{
    double *lspkrpos,/* *pos, */ rightmost, leftmost, anglestep;
    int n;
    if(dz->mode == 0) {                         //  Set lspkr positions for mode 0
        if((dz->parray = (double **)malloc(2 * sizeof(double *)))==NULL) {
            sprintf(errstr,"INSUFFICIENT MEMORY for position storage arrays.\n");
            return(MEMORY_ERROR);
        }
        dz->itemcnt = dz->iparam[PANO_LCNT];    //  Array for loudspeaker positions
        if((dz->parray[0] = (double *)malloc(dz->itemcnt * sizeof(double)))==NULL) {
            sprintf(errstr,"INSUFFICIENT MEMORY to store loudspeaker positions.\n");
            return(MEMORY_ERROR);                                               
        }                                       //  Array for sound positions
        if((dz->parray[1] = (double *)malloc(dz->infilecnt * sizeof(double)))==NULL) {
            sprintf(errstr,"INSUFFICIENT MEMORY to store sound positions.\n");
            return(MEMORY_ERROR);
        }                                       //  Array for sorting
        if((dz->parray[2] = (double *)malloc(max(dz->infilecnt,dz->itemcnt) * sizeof(double)))==NULL) {
            sprintf(errstr,"INSUFFICIENT MEMORY to store sound positions.\n");
            return(MEMORY_ERROR);
        }                                   
        lspkrpos = dz->parray[0];
//        pos = dz->parray[1];
        if(dz->param[PANO_LWID] < 360) {        //  distribute loudspeaker positions across angular width
            rightmost = dz->param[PANO_LWID]/2.0;
            leftmost  = 360.0 - dz->param[PANO_LWID]/2.0;
            anglestep = dz->param[PANO_LWID]/(double)(dz->itemcnt-1);
            for(n=dz->itemcnt-1;n>0;n--) {
                lspkrpos[n] = rightmost;
                if(flteq(lspkrpos[n],0.0))
                    lspkrpos[n] = 0.0;
                else if(lspkrpos[n] < 0.0)
                    lspkrpos[n] += 360.0;
                rightmost -= anglestep;
            }
            lspkrpos[0] = leftmost;
        } else {                                //  distribute loudspeaker positions around circle
            anglestep = 360.00/dz->itemcnt;
            if(dz->vflag[0])                    //  Front pair
                rightmost = -(anglestep/2.0);
            else                                //  Front single
                rightmost = 0.0;
            for(n = 0;n < dz->itemcnt;n++) {
                lspkrpos[n] = rightmost;
                if(lspkrpos[n] < 0.0)
                    lspkrpos[n] += 360.0;
                rightmost += anglestep;
            }
        }
    } 
    n = dz->infilecnt/dz->iparam[PANO_CNFG];    //  Check configuration parameter
    if(n * dz->iparam[PANO_CNFG] != dz->infilecnt) {
        sprintf(errstr,"Sound configuration value is not a divisor of number of input files.\n");
        return(DATA_ERROR);
    }                                           //  Check randomisation param
    if((dz->infilecnt == 2) && (dz->iparam[PANO_SPRD] < 360.0)) {
        if(dz->param[PANO_RAND] > 0.0) {
            sprintf(errstr,"No position randomisation possible with 2 inputs, and sound-spread < 360.\n");
            return(DATA_ERROR);
        }
    }
    return FINISHED;
}

/**************************** PANORAMA_PARAM_PREPROCESS *****************************/

int panorama_param_preprocess(dataptr dz)
{
    double *lspkrpos, *pos, *sort, halfdiffdn, halfdiffup, diffdn, diffup, randoff, temp;
    double sndleftmost, sndrightmost, sndangstep;
    int n, m, k, up, dn, stepcnt, thisstep;

    lspkrpos = dz->parray[0];
    pos      = dz->parray[1];
    sort     = dz->parray[2];
    for(n = 0;n <dz->itemcnt-1;n++) {                   //  sort loudspeaker positions into angular ascending order from 0
        for(m=n;m<dz->itemcnt;m++) {
            if(lspkrpos[n] > lspkrpos[m]) {
                temp = lspkrpos[n];
                lspkrpos[n]  = lspkrpos[m];
                lspkrpos[m] = temp; 
            }
        }
    }                                                   //  For no spaces in the configuration
    if(dz->iparam[PANO_CNFG] == 1) {                    //  Position sounds AS IF THEY ARE zero-centred.
        sndleftmost  = 360 - dz->param[PANO_SPRD]/2.0;  //  startingSat the rightmost sound, divide snd-spread angle equally
        sndrightmost = dz->param[PANO_SPRD]/2.0;        //  For 360, snds (X) and steps (--) are equal in number
        stepcnt = dz->infilecnt;                        //  X--X--X--X--X--X--
        if(dz->param[PANO_SPRD] < 360.0)                //  For < 360, there is 1 less step
            stepcnt--;                                  //  X--X--X--X--X--X
        sndangstep = dz->param[PANO_SPRD]/(double)stepcnt;
        if(dz->param[PANO_SPRD] >= 360.0) {             //  For 360, the last position, oocurs BEFORE the end of the angle-spread
            sndleftmost += sndangstep;                  //  or else 1st and last snds are superimposed:
            if((ODD(dz->infilecnt) && !dz->vflag[1])    //  If a sound at 0 degrees required, offset all vals half-a-turn
            || (EVEN(dz->infilecnt) && dz->vflag[1])) { //  Starting at 180, with an even number of files, 0 degrees will be used
                sndrightmost -= sndangstep/2.0;         //  so only offset if pairing-flag is set
                if(flteq(sndrightmost,0.0))             //  Starting at 180, with an odd number of files, 0 degrees will not be used
                    sndrightmost = 0.0;                 //  so offset if pairing-flag is not used
                else if(sndrightmost < 0)
                    sndrightmost += 360.0;
                sndleftmost  -= sndangstep/2.0;
                if(flteq(sndleftmost,0.0))
                    sndleftmost = 0.0;
                else if(sndleftmost < 0)
                    sndleftmost += 360.0;
            }
        }
        for(n=dz->infilecnt - 1;n>0;n--) {
            pos[n] = sndrightmost;
            sndrightmost -= sndangstep;
            if(flteq(sndrightmost,0.0))
                sndrightmost = 0.0;
            else if(sndrightmost < 0)
                sndrightmost += 360.0;
        }
        pos[0] = sndleftmost;
    } else {                                            //  Where there are space in the configuration (config > 1)
        sndleftmost = 360 - dz->param[PANO_SPRD]/2.0;   //  introducing appropriate gaps into sound layout.
        sndrightmost = dz->param[PANO_SPRD]/2.0;
        thisstep = 0;
        if(dz->param[PANO_SPRD] < 360.0) {                                      //  6 positions with config 2, produces pairs with spaces 
            stepcnt = dz->infilecnt + (dz->infilecnt/dz->iparam[PANO_CNFG]) - 2; // X--X--o--X--X--o--X--X 
            sndangstep = dz->param[PANO_SPRD]/(double)stepcnt;                  //  So there is 1 space for each pair   6/2 = 3 
            for(n=dz->infilecnt - 1;n>0;n--) {                                  //  Except there is no space associated with last pair = (6/2) - 1
                pos[n] = sndrightmost;                                          //  Number of items (poss + spaces) = 6 + (6/2) - 1
                sndrightmost -= sndangstep;                                     //  Number of steps between items is 1 less, 6 + (6/2) - 2 = 8
                if(++thisstep == dz->iparam[PANO_CNFG]) {                       //  6 positions with config 3, produces triplets with spaces
                    sndrightmost -= sndangstep;                                 //  X--X--X--o--X--X--X 
                    thisstep = 0;                                               //  So there is a space for each triplet    6/3 = 2 
                }                                                               //  Except there is no space associated with last triplet = (6/3) - 1
                if(sndrightmost < 0)                                            //  Number of items (poss + spaces) = 6 + (6/3) - 1
                    sndrightmost += 360.0;                                      //  Number of steps between items is 1 less, 6 + (6/3) - 1 = 7 
            }
            pos[0] = sndleftmost;
        } else {                                                                //  Sound surround situation differs
            stepcnt = dz->infilecnt + (dz->infilecnt/dz->iparam[PANO_CNFG]);    //  (1) There is a space after EVERY position-set
            sndangstep = dz->param[PANO_SPRD]/(double)stepcnt;                  //  (2) There is a step between EVERY position-or-space
            sndrightmost = 180;                                                 //  Start at rear, ending on left of space
            sndleftmost = 180 + sndangstep;                                     //  So first and last don't overlap, move leftmost by a turn.
            if(EVEN(stepcnt)) {                                                 //  In order to centre the central-group at 0 degrees
                thisstep = dz->iparam[PANO_CNFG]/2;                             //  If an even number of steps,
                if(EVEN(dz->iparam[PANO_CNFG]))                                 //  Start counting spaces ALREADY half-way through a set
                    sndrightmost -= (sndangstep * 0.5);                         //  And, if an even set, need to offset the group start by half a turn
            } else {                                                            //  If an odd number of steps, force a gap at rear, by
                sndrightmost -= sndangstep;                                     //  offsetting rightmost by 1 turn
                thisstep = 0;
            }
            for(n=dz->infilecnt - 1;n>=0;n--) {
                pos[n] = sndrightmost;
                sndrightmost -= sndangstep;
                if(++thisstep == dz->iparam[PANO_CNFG]) {
                    sndrightmost -= sndangstep;
                    thisstep = 0;
                }
                if(sndrightmost < 0)
                    sndrightmost += 360.0;
                else if(sndrightmost >= 360.0)
                    sndrightmost -= 360.0;
            }
        }
    }
    for(n=0;n<dz->infilecnt;n++) {                      //  Offset the sound-positions
        pos[n] += dz->param[PANO_OFST];
        if(pos[n] > 360.0)
            pos[n] -= 360.0;
        else if(pos[n] < 0)
            pos[n] += 360.0;
    }
    for(n = 0;n <dz->infilecnt-1;n++) {                 //  Sort sound positions into angular ascending order from 0
        for(m=n;m<dz->infilecnt;m++) {
            if(pos[n] > pos[m]) {
                temp = pos[n];
                pos[n]  = pos[m];
                pos[m] = temp; 
            }
        }
    }
    if(dz->param[PANO_RAND] > 0.0) {                    //  Randomise the sound-positions
        for(n = 0;n <dz->infilecnt;n++) {               
            if(pos[n] > 180) {                          //  sort into leftmost to rightmost order (for randomising positions)
                m = n;
                for(k = 0;m < dz->infilecnt;m++,k++)
                    sort[k] = pos[m]; 
                for(m = 0;k < dz->infilecnt;m++,k++)
                    sort[k] = pos[m]; 
                for(m=0;m<dz->infilecnt;m++)
                    pos[m] = sort[m];
                break;
            }
        }
        for(n = 0;n < dz->infilecnt;n++)                //  Store original positions
            sort[n] = pos[n];
        dn = 0;
        up = 2;
        for(n = 1;n < dz->infilecnt-1;n++) {            //  Randomise all inner positions
            diffdn = (sort[n]  - sort[dn]);             //  X--r--r--r--r--r--X for < 360
            diffup = (sort[up] - sort[n]);              //
            if(diffdn < 0)
                diffdn += 360;
            if(diffup < 0)
                diffup += 360;
            halfdiffup = diffup/2.0;
            halfdiffdn = diffdn/2.0;
            randoff = (drand48() * 2.0) - 1.0;          //  X--r--r--r--r--r--X-- for 360
            randoff *= dz->param[PANO_RAND];            //  NB no effect if only 2 infiles
            if(randoff > 0.0) {
                pos[n] = sort[n] + (halfdiffup * randoff);
                if(pos[n] >= 360.0)
                    pos[n] -= 360.0;
            } else {
                pos[n] = sort[n] - (halfdiffdn * randoff);
                if(pos[n] < 0.0)
                    pos[n] += 360.0;
            }
            up++;
            dn++;
        }                                               //  For 360 degree layout
        if(dz->param[PANO_SPRD] >= 360) {               //  Randomise last outer positions
            if(dz->infilecnt >= 3) {                    //  X--r--r--r--r--r--R--
                n = dz->infilecnt-1; 
                dn = dz->infilecnt-2;
                up = 0; 
                diffdn = sort[n]  - sort[dn];
                diffup = sort[up] - sort[n];
                if(diffdn < 0)
                    diffdn += 360;
                if(diffup < 0)
                    diffup += 360;
                halfdiffup = diffup/2.0;
                halfdiffdn = diffdn/2.0;
                randoff = (drand48() * 2.0) - 1.0;
                randoff *= dz->param[PANO_RAND];
                if(randoff > 0.0) {
                    pos[n] = sort[n] + (halfdiffup * randoff);
                    if(pos[n] >= 360.0)
                        pos[n] -= 360.0;
                } else {
                    pos[n] = sort[n] - (halfdiffdn * randoff);
                    if(pos[n] < 0.0)
                        pos[n] += 360.0;
                }
                n  = 0;                                 //  Randomise first outer position
                up = 1;                                 //  R--r--r--r--r--r--r--
                dn = dz->infilecnt-1;
                diffdn = sort[n] - sort[dn];
                diffup = sort[up] - sort[n];
                if(diffdn < 0)
                    diffdn += 360;
                if(diffup < 0)
                    diffup += 360;
                halfdiffup = diffup/2.0;
                halfdiffdn = diffdn/2.0;
                randoff = (drand48() * 2.0) - 1.0;
                randoff *= dz->param[PANO_RAND];
                if(randoff > 0.0) {
                    pos[n] = sort[n] + (halfdiffup * randoff);
                    if(pos[n] >= 360.0)
                        pos[n] -= 360.0;
                } else {
                    pos[n] = sort[n] - (halfdiffdn * randoff);
                    if(pos[n] < 0.0)
                        pos[n] += 360.0;
                }
            } else {                                    //  If only 2 infiles, nothing has changed, so
                n  = 0;                                 //  Randomise first outer position
                up = 1;                                 //  R--X
                dn = dz->infilecnt - 1;
                diffup = sort[up] - sort[n];
                if(diffup < 0)
                    diffup += 360;
                diffdn = 360.0 - diffup;
                halfdiffup = diffup/2.0;
                halfdiffdn = diffdn/2.0;
                randoff = (drand48() * 2.0) - 1.0;
                randoff *= dz->param[PANO_RAND];
                if(randoff > 0.0) {
                    pos[n] = sort[n] + (halfdiffup * randoff);
                    if(pos[n] >= 360.0)
                        pos[n] -= 360.0;
                } else {
                    pos[n] = sort[n] - (halfdiffdn * randoff);
                    if(pos[n] < 0.0)
                        pos[n] += 360.0;
                }                                       //  Randomise last outer position
                n = 1;                                  //  r--R
                temp = halfdiffup;
                halfdiffup = halfdiffdn;
                halfdiffdn = temp;
                randoff = (drand48() * 2.0) - 1.0;
                randoff *= dz->param[PANO_RAND];
                if(randoff > 0.0) {
                    pos[n] = sort[n] + (halfdiffup * randoff);
                    if(pos[n] >= 360.0)
                        pos[n] -= 360.0;
                } else {
                    pos[n] = sort[n] - (halfdiffdn * randoff);
                    if(pos[n] < 0.0)
                        pos[n] += 360.0;
                }
            }
        }
        for(n = 0;n <dz->infilecnt-1;n++) { //  Resort sound positions into angular ascending order from 0
            for(m=n;m<dz->infilecnt;m++) {
                if(pos[n] > pos[m]) {
                    temp = pos[n];
                    pos[n]  = pos[m];
                    pos[m] = temp; 
                }
            }
        }
    }
    for(n = 0;n <dz->infilecnt;n++) {   //  sort into leftmost to rightmost order (for assigning infiles)
        if(pos[n] > 180) {
            m = n;
            for(k = 0;m < dz->infilecnt;m++,k++)
                sort[k] = pos[m]; 
            for(m = 0;k < dz->infilecnt;m++,k++)
                sort[k] = pos[m]; 
            for(m=0;m<dz->infilecnt;m++)
                pos[m] = sort[m];
            break;
        }
    }
    return FINISHED;
}

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

int get_the_process_no(char *prog_identifier_from_cmdline,dataptr dz)
{
    if(!strcmp(prog_identifier_from_cmdline,"panorama"))    dz->process = PANORAMA;
    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,"panorama")) {
        fprintf(stdout,
        "USAGE: panorama panorama 1 infile infile2 [infile3.....] outmixfile\n"
        "           lspk_cnt lspk_aw sounds_aw sounds_ao config [-rrand] [-p] [-q]\n"
        "OR:    panorama panorama 2 infile infile2 [infile3.....] outmixfile\n"
        "           lspk_positions   sounds_aw sounds_ao config [-rrand] [-p] [-q]\n"
        "\n"
        "Distribute (>1) mono files in spatial panorama, in multichannel mixfile.\n"
        "Lspkrs assumed to surround listening area from front outwards.\n"
        "Input sounds distributed in order from leftmost to rightmost position.\n"
        "\n"
        "LSPK_CNT  Number of lspkrs (mode 1 equally spaced: not ness so in mode 2).\n"
        "LSPK_AW   Angular width of loudspeaker array (190 - 360), front centre at 0.\n"
        "          Loudspeaker array assumed symmetrical around a centre-line\n"
        "          running through front-centre of lspkr array and centre of auditorium.\n"
        "          Thus, if front centre is at 0 then \n" 
        "          190 spread is from -95 to (+)95; 360 spread is from -180 to (+)180.\n"
        "\n"
        "SOUNDS_AW angular width of output sounds (equal to or less than LSPK_AW).\n"
        "\n"
        "SOUNDS_AO angular offset of output snds. (Only possible if SOUNDS_AW < LSPK_AW)\n"
        "          (angle between centre-line of snds and centre-line of lspkrs)\n"
        "\n"
        "CONFIG   Distribution of output sounds within output angle\n"
        "         config = 1: sounds equally spaced\n"
        "         config = 2: 2 sounds equally spaced, followed by gap, etc.\n"
        "         config = 3: 3 sounds equally spaced, followed by gap\n"
        "         and so on. CONFIG must be a divisor of the number of input sounds.\n"
        "\n"
        "RAND     Randomisation of sound positions (0-1).\n"
        "\n"
        "LSPK_POSITIONS (Mode 2) Textfile list of angular positions of (3-16) lspkrs.\n"
        "          Positions specified by +ve values from 0 (front centre) clockwise, so\n"
        "          vals to right of centre lie between 0 (front)and 180 (rear)\n"
        "          vals to left of centre lie between >180 (rear) and 360(=0) (front)\n"
        "\n"
        "-p       If angular width of lspkrs (LSPK_AW) < 360 :\n"
        "         Odd number of lspkrs gives 1 lspkr at centre front.\n"
        "         Even number of lspkrs gives pair of lspkrs centred on front.\n"
        "         If LSP_AW = 360, speaker orientation is ambiguous.\n"
        "         Default is 1 lspkr at centre front.\n"
        "         \"-p\" flag give PAIR of lspkrs at front (IGNORED if LSP_AW < 360 )\n"
        "-q       Same logic for SOUND positions ( ignored if SOUNDS_AW < 360 )\n"
        "\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);
}

/******************************** PANORAMA ********************************/

int panorama(dataptr dz)
{
    double *lspkrpos = dz->parray[0], *pos = dz->parray[1];
    int chans = dz->infile->channels, gotext = 0;
    double thispos, loangle, hiangle = 0.0, lspkr_angle, left_lspkr_offset, stereopos, leftgain, rightgain, lspkrposlo, lspkrposhi;
    int n, lo, hi;
    char temp[4000], temp2[200], *p;

    sprintf(temp,"%i\n",dz->itemcnt);
    if(fputs(temp,dz->fp) < 0) {
        sprintf(errstr,"Error writing to output data file\n");
        return(PROGRAM_ERROR);
    }
    for(n=0; n< dz->infilecnt; n++) {
        loangle = -1;
        thispos = pos[n];
        lo = 0;
        hi = 1;
        while(lo < dz->itemcnt) {
            lspkrposlo = lspkrpos[lo];
            lspkrposhi = lspkrpos[hi];
            if(lspkrposhi < lspkrposlo) {
                if((thispos >= lspkrposlo && thispos <= 360.0)
                || (thispos >= 0.0 && thispos < lspkrposhi)) {
                    loangle = lspkrpos[lo];
                    hiangle = lspkrpos[hi] + 360;
                    break;
                }
            } else if (thispos >= lspkrposlo && thispos < lspkrposhi) {
                loangle = lspkrpos[lo];
                hiangle = lspkrpos[hi];
                break;
            }
            if(++hi >= dz->itemcnt)
                hi = 0;
            lo++;
        }
        if(loangle < 0.0) {
            sprintf(errstr,"Error locating lspkr pair\n");
            return(PROGRAM_ERROR);
        }
        lspkr_angle = hiangle - loangle;
        if(lspkrpos[lo] < thispos)
            left_lspkr_offset =  thispos - lspkrpos[lo];
        else
            left_lspkr_offset =  thispos - (lspkrpos[lo] - 360.0);
        if(flteq(left_lspkr_offset,360.0))
            left_lspkr_offset = 0.0;
        stereopos = left_lspkr_offset/lspkr_angle;      //  Range 0 - 1
        stereopos  = (stereopos * 2.0) - 1.0;           //  Range -1 to +1

        pancalc(stereopos,&leftgain,&rightgain);
        lo++;       //  Change from data-numbering (0 to N-1) to channel-routing numbering (1 to N)
        hi++;
        sprintf(temp2,"%s",dz->wordstor[n]);
        p = temp2;
        gotext = 0;
        while(*p != ENDOFSTR) {
            if(*p == '.') {
                gotext = 1;
                break;
            }
            p++;
        }
        if(!gotext)
            strcat(temp2,".wav");
        strcpy(temp,temp2);
        strcat(temp," 0.0 ");
        sprintf(temp2,"%i",chans);
        strcat(temp,temp2);
        if(!flteq(leftgain,0.0)) {
            sprintf(temp2," 1:%i",lo);
            strcat(temp,temp2);
            strcat(temp," ");
            sprintf(temp2,"%lf",leftgain);
            strcat(temp,temp2);
        }
        if(!flteq(rightgain,0.0)) {
            sprintf(temp2," 1:%i",hi);
            strcat(temp,temp2);
            strcat(temp," ");
            sprintf(temp2,"%lf",rightgain);
            strcat(temp,temp2);
        }
        strcat(temp,"\n");
        if(fputs(temp,dz->fp) < 0) {
            sprintf(errstr,"Error writing to output data file\n");
            return(PROGRAM_ERROR);
        }
    }
    return FINISHED;
}

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

int handle_the_special_data(char *str,dataptr dz)
{       
    int n, m, k;
    double *lspkrpos, *sort;
    double dummy = 0.0, leftangle, rightangle, thispos, tempval;
    FILE *fp;
    int cnt;
    char temp[200], *p;
    if((dz->parray = (double **)malloc(3 * sizeof(double *)))==NULL) {          //  Arrays fpr lspkr positions, sound positions and sorting
        sprintf(errstr,"INSUFFICIENT MEMORY for position storage arrays.\n");
        return(MEMORY_ERROR);
    }
    if((fp = fopen(str,"r"))==NULL) {
        sprintf(errstr,"Cannot open file %s to read loudspeaker locations.\n",str);
        return(DATA_ERROR);
    }
    cnt = 0;
    while(fgets(temp,200,fp)!=NULL) {
        p = temp;
        if(*p == ';')   //  Allow comments in file
            continue;

        while(get_float_from_within_string(&p,&dummy)) {
            if(dummy < 0.0 || dummy > 360) {
                sprintf(errstr,"Angular position (%lf) of loudspeaker %d out of range (0-360).\n",dummy,cnt+1);
                return(DATA_ERROR);
            }
            if(flteq(dummy,360.0))
                dummy = 0.0;
            cnt++;
        }
    }
    if(cnt > 16 || cnt < 3) {
        sprintf(errstr,"Process only works with 3 or more (and no more than 16) loudspeakers. You have entered %d\n",cnt);
        return(DATA_ERROR);
    }
    dz->itemcnt = cnt;
    if((dz->parray[0] = (double *)malloc(dz->itemcnt * sizeof(double)))==NULL) {    //  Array for loudspeaker positions
        sprintf(errstr,"INSUFFICIENT MEMORY to store loudspeaker positions.\n");
        return(MEMORY_ERROR);                                               
    }                                                                               //  Array for sound positions
    if((dz->parray[1] = (double *)malloc(dz->infilecnt * sizeof(double)))==NULL) {
        sprintf(errstr,"INSUFFICIENT MEMORY to store sound positions.\n");
        return(MEMORY_ERROR);
    }                                                                               //  Array for sorting lspkr AND snd positions
    if((dz->parray[2] = (double *)malloc(max(dz->infilecnt,dz->itemcnt) * sizeof(double)))==NULL) {
        sprintf(errstr,"INSUFFICIENT MEMORY to store loudspeaker positions sort.\n");
        return(MEMORY_ERROR);
    }
    lspkrpos  = dz->parray[0];
    sort = dz->parray[2];
    fseek(fp,0,0);
    cnt = 0;
    while(fgets(temp,200,fp)!=NULL) {
        p = temp;
        if(*p == ';')   //  Allow comments in file
            continue;

        while(get_float_from_within_string(&p,&dummy)) {
            if(cnt > 0) {
                for(n = 0; n < cnt; n++) {
                    if(fabs(lspkrpos[n] - dummy) < 1.0) {
                        sprintf(errstr,"Loudspeaker positions at %f and %f are unrealisatically close\n",lspkrpos[n],dummy);
                        return(DATA_ERROR);
                    }
                }
            }
            lspkrpos[cnt] = dummy;
            cnt++;
        }
    }
    if(fclose(fp)<0) {
        fprintf(stdout,"WARNING: Failed to close input textfile %s.\n",str);
        fflush(stdout);
    }
    leftangle  = 0.0;
    rightangle = 0.0;
    for(n = 0;n <cnt;n++) {             //  sort into angular ascending order
        if(lspkrpos[n] > 180) {
            thispos = 360 - lspkrpos[n];
            if(thispos > leftangle)
                leftangle = thispos;
        } else if(lspkrpos[n] > rightangle)
            rightangle = lspkrpos[n];
    }
    if(leftangle + rightangle <= 180) {
        sprintf(errstr,"Loudspeakers do not encircle the listening area.\n");
        return(DATA_ERROR);
    }
    for(n = 0;n <cnt-1;n++) {           //  sort into angular ascending order
        for(m=n;m<cnt;m++) {
            if(lspkrpos[n] > lspkrpos[m]) {
                tempval = lspkrpos[n];
                lspkrpos[n]  = lspkrpos[m];
                lspkrpos[m] = tempval; 
            }
        }
    }
    sort = dz->parray[2];
    for(n = 0;n <cnt;n++) {         //  sort into leftmost to rightmost order
        if(lspkrpos[n] > 180) {
            m = n;
            for(k = 0;m < cnt;m++,k++)
                sort[k] = lspkrpos[m]; 
            for(m = 0;k < cnt;m++,k++)
                sort[k] = lspkrpos[m]; 
            for(m=0;m<cnt;m++)
                lspkrpos[m] = sort[m];
            break;
        }
    }
    return(FINISHED);
}

/****************************** GET_THE_MODE_FROM_CMDLINE *********************************/

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

/************************************ PANCALC *******************************/

void pancalc(double position,double *leftgain,double *rightgain)
{
    int dirflag;
    double temp;
    double relpos;
    double reldist, invsquare;

    if(position < 0.0)
        dirflag = SIGNAL_TO_LEFT;       /* signal on left */
    else
        dirflag = SIGNAL_TO_RIGHT;

    if(position < 0) 
        relpos = -position;
    else 
        relpos = position;
    if(relpos <= 1.0){      /* between the speakers */
        temp = 1.0 + (relpos * relpos);
        reldist = ROOT2 / sqrt(temp);
        temp = (position + 1.0) / 2.0;
        *rightgain = temp * reldist;
        *leftgain = (1.0 - temp ) * reldist;
    } else {                /* outside the speakers */
        temp = (relpos * relpos) + 1.0;
        reldist  = sqrt(temp) / ROOT2;   /* relative distance to source */
        invsquare = 1.0 / (reldist * reldist);
        if(dirflag == SIGNAL_TO_LEFT){
            *leftgain = invsquare;
            *rightgain = 0.0;
        } else {   /* SIGNAL_TO_RIGHT */
            *rightgain = invsquare;
            *leftgain = 0;
        }
    }
}