/*
 * Copyright (c) 1983-2013 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>

#if defined unix || defined __GNUC__
#define round(x) lround((x))
#endif
#ifndef HUGE
#define HUGE 3.40282347e+38F
#endif

char errstr[2400];

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

const char* cdp_version = "7.1.0";

//CDP LIB REPLACEMENTS
static int setup_mchstereo_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_mchstereo_param_ranges_and_defaults(dataptr dz);
static int handle_the_outfile_name(int *cmdlinecnt,char ***cmdline,dataptr dz);
static int open_the_outfile(dataptr dz);
static int handle_other_infiles(char ***cmdline,int *cmdlinecnt,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 setup_and_init_input_brktable_constants(dataptr dz,int brkcnt);
static int check_the_param_validity_and_consistency(dataptr dz);
static int read_the_special_data(char *filename,dataptr dz);
static int open_and_checktype_getsize_and_compareheader(char *filename,int fileno,fileptr *fp2,dataptr dz);
static int headcompare(int fd,char *filename,fileptr *fp2,int fileno,dataptr dz);
static int read_the_header(infileptr inputfile,int ifd,char *filename);
static int mchstereo(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--;
		// setup_particular_application =
		if((exit_status = setup_mchstereo_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_mchstereo_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()
	if((exit_status = handle_other_infiles(&cmdline,&cmdlinecnt,dz))<0) {
		print_messages_and_close_sndfiles(exit_status,is_launched,dz);		
		return(FAILED);
	}
	// handle_outfile() = 

	if((exit_status = handle_the_outfile_name(&cmdlinecnt,&cmdline,dz))<0) {
		print_messages_and_close_sndfiles(exit_status,is_launched,dz);
		return(FAILED);
	}

//	handle_formants()			redundant
//	handle_formant_quiksearch()	redundant
	if((exit_status = read_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_the_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 = (dz->infilecnt * 2) + dz->iparam[0];
	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_sndbufs(dz))<0) {							// CDP LIB
		print_messages_and_close_sndfiles(exit_status,is_launched,dz);
		return(FAILED);
	}
	//param_preprocess()						redundant
	//spec_process_file =
	if((exit_status = mchstereo(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(dz))<0)	    redundant
	if((exit_status = setup_internal_arrays_and_array_pointers(dz))<0)	 
		return(exit_status);
	return(FINISHED);
}

/********************** SETUP_PARAMETER_STORAGE_AND_CONSTANTS ********************/
/* RWD mallo changed to calloc; helps debug verison run as release! */

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

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

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

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

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

/************************ HANDLE_THE_OUTFILE_NAME *********************/

int handle_the_outfile_name(int *cmdlinecnt,char ***cmdline,dataptr dz)
{
	char *filename = (*cmdline)[0];
	if(filename[0]=='-' && filename[1]=='f') {
		dz->floatsam_output = 1;
		dz->true_outfile_stype = SAMP_FLOAT;
		filename+= 2;
	}
	if(!sloom) {
		if(file_has_invalid_startchar(filename) || value_is_numeric(filename)) {
			sprintf(errstr,"Outfile name %s has invalid start character(s) or looks too much like a number.\n",filename);
			return(DATA_ERROR);
		}
	}
	if((dz->outfilename = malloc((strlen(filename) + 1) * sizeof(char)))==NULL) {
		sprintf(errstr,"handle_the_outfile_name()\n");
		return(MEMORY_ERROR);
	}
	strcpy(dz->outfilename,filename);	//	Just store the name for now
	(*cmdline)++;
	(*cmdlinecnt)--;
	return(FINISHED);
}

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

int open_the_outfile(dataptr dz)
{
	int exit_status;
	dz->outfile->channels = dz->iparam[0];
	dz->infile->channels = dz->iparam[0];
	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_MCHSTEREO_APPLICATION *******************/

int setup_mchstereo_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((exit_status = set_param_data(ap,OCHANDATA,2,2,"id"))<0)
		return(FAILED);
	if((exit_status = set_vflgs(ap,"",0,"","s",1,0,"0"))<0)
		return(FAILED);
	// set_legal_infile_structure -->
	dz->has_otherfile = FALSE;
	// assign_process_logic -->
	dz->input_data_type = ONE_OR_MANY_SNDFILES;
	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 != 2)  {
			sprintf(errstr,"File %s is not of correct type (must be stereo)\n",cmdline[0]);
			return(DATA_ERROR);
		}
		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_MCHSTEREO_PARAM_RANGES_AND_DEFAULTS *******************/

int setup_mchstereo_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[0]	= 2.0;
	ap->hi[0]	= 16.0;
	ap->default_val[0]	= 8.0;
	ap->lo[1]	= 0.0;
	ap->hi[1]	= 1.0;
	ap->default_val[1]	= 0.5;
	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_mchstereo_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);
}

/************************* SETUP_INTERNAL_ARRAYS_AND_ARRAY_POINTERS *******************/

int setup_internal_arrays_and_array_pointers(dataptr dz)
{
	int n;
	dz->larray_cnt = 1; 
	dz->array_cnt = 0; 
	if((dz->lparray  = (int **)malloc(dz->larray_cnt * sizeof(int *)))==NULL) {
		sprintf(errstr,"INSUFFICIENT MEMORY for internal long arrays.\n");
		return(MEMORY_ERROR);
	}
	for(n=0;n<dz->larray_cnt;n++)
		dz->lparray[n] = NULL;
	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 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("mchstereo");
	return(USAGE_ONLY);
}

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

int get_the_process_no(char *prog_identifier_from_cmdline,dataptr dz)
{
	if(!strcmp(prog_identifier_from_cmdline,"mchstereo"))				dz->process = MCHSTEREO;
	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,"mchstereo")) {
		fprintf(stderr,
	    "USAGE:\n"
	    "mchstereo mchstereo infil1 [infil2 ..] outfile ochandata ochans pregain [-s]\n"
		"\n"
		"Place several stereo files in a multichannel output space.\n"
		"\n"
		"OCHANDATA Position of each stereo input in the outchannel frame.\n"
		"          This is a list of output channel-numbers.\n"
		"          There must be one number for each input file.\n"
		"          e.g. with 3 input stereo sounds to an 8-channel output,\n"
		"          '1 3 6' means the 3 input stereo sounds\n"
		"          are centred at output channels 1, 3 and 6 respectively.\n"
		"          BUT\n"
		"-s        Shifts stereo images half-a-channel to right\n"
		"          so, in our example\n"
		"          1st stereo image is centred BETWEEN channels 1 and 2.\n"
		"          2nd stereo image is centred BETWEEN channels 3 and 4.\n"
		"          3rd stereo image is centred BETWEEN channels 6 and 7.\n"
		"\n"
		"OCHANS    Number of channels in the output file (Range 2-16).\n"
		"PREGAIN   Gain applied to input sounds. (Range 0-1)\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);
}

/************************** READ_THE_SPECIAL_DATA ********************************/

int read_the_special_data(char *filename,dataptr dz)
{
	int ival;
	int n = 0;
	double val;
	char temp[200], *p, *thisword, temp2[200];

	thisword = temp2;
	p = filename;
	if(sloom && (*p == '@'))
		p++;
	if(isdigit(*p)) {
		if(sscanf(p,"%d",&n)!=1) {
			sprintf(errstr,"Invalid data for outchannel assignment (%s)\n",filename);
			return(DATA_ERROR);
		}
		if(dz->infilecnt != 1) {
			sprintf(errstr,"You have used %d input files, but assigned only one centring value.\n",dz->infilecnt);
			return(DATA_ERROR);
		}
		if((dz->lparray[0] = malloc(sizeof(int)))==NULL) {
			sprintf(errstr,"Insufficient memory to store outchannel assignment.\n");
			return(MEMORY_ERROR);
		}
		dz->lparray[0][0] = n;
		return FINISHED;
	}
	if((dz->fp = fopen(filename,"r"))==NULL) {
		sprintf(errstr,"Cannot open datafile %s\n",filename);
		return(DATA_ERROR);
	}
	while(fgets(temp,200,dz->fp)!=NULL) {
		p = temp;
		if(is_an_empty_line_or_a_comment(p))
			continue;
		while(get_word_from_string(&p,&thisword))
			n++;
	}
	if(n==0) {
		sprintf(errstr,"No data in file %s\n",filename);
		return(DATA_ERROR);
	}
	if(n != dz->infilecnt) {
		sprintf(errstr,"%d infiles, but %d output assignments in file %s.\n",dz->infilecnt,n,filename);
		return(MEMORY_ERROR);
	}
	if((dz->lparray[0] = malloc(dz->infilecnt * sizeof(int)))==NULL) {
		sprintf(errstr,"Insufficient memory to store edit-chans data in file %s.\n",filename);
		return(MEMORY_ERROR);
	}
	if(fseek(dz->fp,0,0)<0) {
		sprintf(errstr,"fseek() failed in read_the_special_data()\n");
		return(SYSTEM_ERROR);
	}
	n = 0;
	while(fgets(temp,200,dz->fp)!=NULL) {
		p = temp;
		if(is_an_empty_line_or_a_comment(temp))
			continue;
		while(get_word_from_string(&p,&thisword)) {
			if(sscanf(thisword,"%lf",&val)!=1) {
				sprintf(errstr,"Problem reading Value: file %s\n",filename);
				return(DATA_ERROR);
			}
			ival = (int)round(val);
			if(ival < 1) {
				sprintf(errstr,"Invalid channel number (%d) in file %s\n",ival,filename);
				return(DATA_ERROR);
			}
			ival--;
			dz->lparray[0][n] = ival;
			n++;
		}
	}
	if(fclose(dz->fp)<0) {
		fprintf(stdout,"WARNING: Failed to close input textfile %s.\n",filename);
		fflush(stdout);
	}
	return(FINISHED);
}

/************************************ CHECK_THE_PARAM_VALIDITY_AND_CONSISTENCY ****************************/

int check_the_param_validity_and_consistency(dataptr dz)
{
	int n;
	for(n=0;n< dz->infilecnt;n++) {
		if(dz->lparray[0][n] > dz->iparam[0]) {
			sprintf(errstr,"Output assigned to channel %d which does not exist in %d channel output file\n",dz->lparray[0][n],dz->iparam[0]);
			return(DATA_ERROR);
		}
	}
	if(dz->param[1] <= 0.0) {
		sprintf(errstr,"Pregain value of zero will produce a silent output file.\n");
		return(DATA_ERROR);
	}
	return FINISHED;
}

/************************ HANDLE_OTHER_INFILES *********************/

int handle_other_infiles(char ***cmdline,int *cmdlinecnt,dataptr dz)
{
					/* OPEN ANY FURTHER INFILES, CHECK COMPATIBILITY, STORE DATA AND INFO */
	int  exit_status;
	int  n;
	char *filename;
	fileptr fp2;
	if(dz->infilecnt > 1) {
		for(n=1;n<dz->infilecnt;n++) {
			filename = (*cmdline)[0];
			if((exit_status = open_and_checktype_getsize_and_compareheader(filename,n,&fp2,dz))<0)
				return(exit_status);
			(*cmdline)++;
			(*cmdlinecnt)--;
		}
	}
	return(FINISHED);
}

/************************ MCHSTEREO *********************/

int mchstereo(dataptr dz)
{
	int exit_status;
	int n, m, llin, rrin, llout, rrout, ccout, thiscentre, ochans = dz->iparam[0];
	float **ibuf, *obuf;
	int *sampsleft, obuflen, osamppos, maxsampsread;
	double pregain = dz->param[1], halfpregain = pregain/2.0;
	int *centrepos = dz->lparray[0];

	if((ibuf = malloc(dz->infilecnt * sizeof(float *)))==NULL) {
		sprintf(errstr,"Insufficient memory to Create buffer pointers.\n");
		return(MEMORY_ERROR);
	}
	if((sampsleft = malloc(dz->infilecnt * sizeof(int)))==NULL) {
		sprintf(errstr,"Insufficient memory to Create file-reading counters.\n");
		return(MEMORY_ERROR);
	}
	for(n = 0,m=0;n < dz->infilecnt;n++,m+=2) {
		ibuf[n] = dz->sampbuf[m];			//	We've created enoiugh buffers for every input and output channel
		sampsleft[n] = dz->insams[n];		//	So we can use alternate buffers as (start-points) of read bufs
	}
	obuf = dz->sampbuf[m];
	obuflen = dz->buflen * ochans;
	dz->buflen *= 2;						//	And extend the (read) buflen by 2
	maxsampsread = 0;
	for(n = 0;n < dz->infilecnt;n++) {
		memset((char *)ibuf[n],0,dz->buflen * sizeof(float));
		if((dz->ssampsread = fgetfbufEx(ibuf[n], dz->buflen,dz->ifd[n],0)) < 0) {
			sprintf(errstr,"Can't read samples from input soundfile %d.\n",n+1);
			return(SYSTEM_ERROR);
		}
		sampsleft[n] -= dz->ssampsread;	
		maxsampsread = max(dz->ssampsread,maxsampsread);
	}
	memset((char *)obuf,0,obuflen * sizeof(float));
	while(maxsampsread > 0) {
		for(llin=0,rrin=1,osamppos=0;llin < maxsampsread;llin+=2,rrin+=2,osamppos += ochans) {
			for(n = 0;n < dz->infilecnt;n++) {
				thiscentre = centrepos[n];
				if(dz->vflag[0]) {		//	Stereo centred between output lspkrs
					llout = thiscentre;
					if((rrout = llout + 1) >= ochans)
						rrout = 0;
					obuf[osamppos + llout] = (float)(obuf[osamppos + llout] + (ibuf[n][llin] * pregain));
					obuf[osamppos + rrout] = (float)(obuf[osamppos + rrout] + (ibuf[n][rrin] * pregain));
				} else {				//	Stereo centred at lspkr
					ccout = thiscentre;		//	Half of each stero chan goes to centre
					obuf[osamppos + ccout] = (float)(obuf[osamppos + ccout] + ((ibuf[n][llin] + ibuf[n][rrin]) * halfpregain));
					if((llout = ccout - 1) < 0)
						llout += ochans;				//	Half of left chan goes further left
					obuf[osamppos + llout] = (float)(obuf[osamppos + llout] + (ibuf[n][llin] * halfpregain));
					if((rrout = ccout + 1) >= ochans)
						rrout = 0;						//	Half of right chan goes further right
					obuf[osamppos + rrout] = (float)(obuf[osamppos + rrout] + (ibuf[n][rrin] * halfpregain));
				}
			}
		}
		if((exit_status = write_samps(obuf,osamppos,dz))<0)
			return(exit_status);
		memset((char *)obuf,0,obuflen * sizeof(float));
		maxsampsread = 0;
		for(n = 0;n < dz->infilecnt;n++) {
			memset((char *)ibuf[n],0,dz->buflen * sizeof(float));
			if(sampsleft[n] > 0) {
				if((dz->ssampsread = fgetfbufEx(ibuf[n], dz->buflen,dz->ifd[n],0)) < 0) {
					sprintf(errstr,"Can't read samples from input soundfile %d.\n",n+1);
					return(SYSTEM_ERROR);
				}
				sampsleft[n] -= dz->ssampsread;	
				maxsampsread = max(dz->ssampsread,maxsampsread);
			}
		}
	}
	return(FINISHED);
}

/************************** OPEN_AND_CHECKTYPE_GETSIZE_AND_COMPAREHEADER *****************************/

int open_and_checktype_getsize_and_compareheader(char *filename,int fileno,fileptr *fp2,dataptr dz)
{
	int exit_status;

	if((dz->ifd[fileno] = sndopenEx(filename,0,CDP_OPEN_RDONLY)) < 0) {
		sprintf(errstr,"cannot open input file %s to read data.\n",filename);
		return(DATA_ERROR);
	}
	if((exit_status = headcompare(dz->ifd[fileno],filename,fp2,fileno,dz))<0)
		return(exit_status);
	if((dz->insams[fileno] = sndsizeEx(dz->ifd[fileno]))<0) {	    /* FIND SIZE OF FILE */
		sprintf(errstr, "Can't get size of input file %s.\n",filename);
		return(PROGRAM_ERROR);
	}
	if(dz->insams[fileno]==0) {
		sprintf(errstr, "File %s contains no data.\n",filename);
		return(DATA_ERROR);
	}
	return(FINISHED);
}

/***************************** HEADCOMPARE *******************************/

int headcompare(int fd,char *filename,fileptr *fp2,int fileno,dataptr dz)
{
	int exit_status;
	fileptr fp1 = dz->infile; 
	infileptr ifp;
	if((ifp = (infileptr)malloc(sizeof(struct filedata)))==NULL) {
		sprintf(errstr,"INSUFFICIENT MEMORY to store data on later infile. (1)\n");
		return(MEMORY_ERROR);
	}
	if((*fp2 = (fileptr)malloc(sizeof(struct fileprops)))==NULL) {
		sprintf(errstr,"INSUFFICIENT MEMORY to store data on later infile. (2)\n");
		return(MEMORY_ERROR);
	}
	if((exit_status = read_the_header(ifp,fd,filename))<0)
		return(exit_status);
	copy_to_fileptr(ifp,*fp2);
	if((*fp2)->srate != fp1->srate) {
		sprintf(errstr,"Incompatible sample-rate in input file %s.\n",filename);
		return(DATA_ERROR);
	}
	if((*fp2)->channels != fp1->channels) {
		sprintf(errstr,"Incompatible channel-count in input file %s.\n",filename);
		return(DATA_ERROR);
	}
	return(FINISHED);
}	    

/***************************** READ_THE_HEADER *******************************
 *
 * Header reader for sndfiles,envfiles,analfiles etc..
 */

int read_the_header(infileptr inputfile,int ifd,char *filename)
{
	SFPROPS props = {0};
	int isenv = 0;
	int os;
	
	if(!snd_headread(ifd,&props)) {
		fprintf(stdout,"INFO: Failure to read properties, in %s\n",filename);
		fflush(stdout);
		return(DATA_ERROR);
	}
	inputfile->srate = props.srate;
	inputfile->channels = props.chans;

	switch(props.samptype) {
	case(SHORT16):	inputfile->stype = SAMP_SHORT;	break;
	case(FLOAT32):	inputfile->stype = SAMP_FLOAT;	break;
	case(SHORT8):	inputfile->stype = SAMP_BYTE;	break;
	default:	
		/* remaining symbols have same int value */	
		inputfile->stype = (int)props.samptype;	/* RWD April 2005 */
		break;
	}
	inputfile->filetype = SNDFILE;
	if(sndgetprop(ifd,"is an envelope",(char *) &isenv,sizeof(int)) >= 0)
		inputfile->filetype = ENVFILE;
	else if(sndgetprop(ifd,"is a formant file",(char *) &isenv,sizeof(int)) >= 0)
		inputfile->filetype = FORMANTFILE;
	else if(sndgetprop(ifd,"is a pitch file",(char *) &isenv,sizeof(int)) >= 0)
		inputfile->filetype = PITCHFILE;
	else if(sndgetprop(ifd,"is a transpos file",(char *) &isenv,sizeof(int)) >= 0)
		inputfile->filetype = TRANSPOSFILE;
	else if(sndgetprop(ifd,"original sampsize",(char *) &os,sizeof(int)) > 0)
		inputfile->filetype = ANALFILE;

	if(inputfile->filetype != SNDFILE) {
		sprintf(errstr,"%s is wrong type of file for this process\n",filename);
		return(DATA_ERROR);
	}
	return(FINISHED);
}