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#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#define NUM_DEVICES 3
#define MAX_SENSORS 32
#define MAX_SWEEP_INFO 4
#define MAX_DATAPOINTS_PER_SECTION 16384
//Takes 300MB of ram to boot.
const char * Devices[] = { "HMD", "WM0", "WM1" };
const char * DevMap[] = { "LX", "LY", "RX", "RY" };
uint32_t DATASWEEP[NUM_DEVICES][MAX_SENSORS][MAX_SWEEP_INFO][MAX_DATAPOINTS_PER_SECTION];
uint16_t DATALENGTH[NUM_DEVICES][MAX_SENSORS][MAX_SWEEP_INFO][MAX_DATAPOINTS_PER_SECTION];
int DPNUM[NUM_DEVICES][MAX_SENSORS][MAX_SWEEP_INFO];
int main( int argc, char ** argv )
{
if( argc < 2 )
{
fprintf( stderr, "Error: usage process_to_points [raw data.csv]\n" );
exit( -5 );
}
FILE * f = fopen( argv[1], "r" );
int lineno = 0;
while(!feof(f) && !ferror(f) )
{
int i;
lineno++;
//Expecting; L X WM0 632359048 2 2 190890 319
//Pulsecode is ignored, L/R X/Y is what is used.
char * line;
size_t n = 0;
ssize_t r = getline( &line, &n, f );
if( r <= 0 ) break;
char lhn[10];
char axn[10];
char dev[10];
int unusedtime = 0;
int sensor = 0;
int unusedcode = 0;
int timeinsweep = 0;
int pulselength = 0;
int rr = sscanf(line,"%8s %8s %8s %d %d %d %d %d\n", lhn, axn, dev, &unusedtime, &sensor, &unusedcode, &timeinsweep, &pulselength );
free( line );
if( rr != 8 )
{
fprintf( stderr, "Warning: On line %d, only %d values read\n", lineno, rr );
continue;
}
int devnum = -1;
for( i = 0; i < NUM_DEVICES; i++ )
{
if( strcmp( dev, Devices[i] ) == 0 ) break;
}
if( i == NUM_DEVICES )
{
fprintf( stderr, "Error: unrecognized device %s on line %d\n",dev, lineno );
continue;
}
devnum = i;
if( sensor < 0 || sensor > MAX_SENSORS )
{
fprintf( stderr, "Error: sensor # too high on dev at line %d\n",lineno );
continue;
}
char lcom[3];
lcom[0] = lhn[0];
lcom[1] = axn[0];
lcom[2] = 0;
for( i = 0; i < 4; i++ )
{
if( strcmp( lcom, DevMap[i] ) == 0 ) break;
}
if( i == 4 )
{
fprintf( stderr, "Error: entry type %s confusing on line %d\n", lcom, lineno );
continue;
}
int swe = i;
int num = DPNUM[devnum][sensor][swe]++;
if( num >= MAX_DATAPOINTS_PER_SECTION )
{
fprintf( stderr, "Error: Too many datapoints on line %d - %d found, %d max\n", lineno, num, MAX_DATAPOINTS_PER_SECTION );
continue;
}
DATASWEEP[devnum][sensor][swe][num] = timeinsweep;
DATALENGTH[devnum][sensor][swe][num] = pulselength;
}
fprintf( stderr, "Read %d lines of data.\n", lineno );
//Now, process the data.
FILE * hists = fopen( "histograms.csv", "w" );
int dev, sen, swe;
for( dev = 0; dev < NUM_DEVICES; dev++ )
for( sen = 0; sen < MAX_SENSORS; sen++ )
for( swe = 0; swe < 4; swe++ )
{
int dpmax = DPNUM[dev][sen][swe];
if( !dpmax ) continue;
int i;
double sumsweeptime = 0;
double sumlentime = 0;
int count = 0;
//First make a rough histogram to find the peak, discard points not anywhere close to peak.
#define MAX_LENTIME 200000 //800000/4
#define MAX_PERMISSABLE_TO_PEAK 40
int cullcount = 0;
int biggesttime = 0;
int biggesttimeplace = -1;
{
int bincounts[MAX_LENTIME];
for( i = 0; i < dpmax; i++ )
{
int sweeptime = DATASWEEP[dev][sen][swe][i]/4;
if( sweeptime < 0 || sweeptime > MAX_LENTIME )
{
DATASWEEP[dev][sen][swe][i] = -1;
continue;
}
int rc = bincounts[sweeptime]++;
if( rc > biggesttime )
{
biggesttime = rc;
biggesttimeplace = sweeptime;
}
}
}
for( i = 0; i < dpmax; i++ )
{
int sweeptime = DATASWEEP[dev][sen][swe][i];
int datalen = DATALENGTH[dev][sen][swe][i];
int dist_to_peak = sweeptime/4 - biggesttimeplace ;
if( sweeptime < 0 ) continue;
if( dist_to_peak > MAX_PERMISSABLE_TO_PEAK || dist_to_peak < -MAX_PERMISSABLE_TO_PEAK )
{
DATASWEEP[dev][sen][swe][i] = -1;
cullcount++;
continue;
}
sumsweeptime += sweeptime;
sumlentime += datalen;
count++;
}
if( count < 50 ) continue;
double avgsweep = sumsweeptime / count;
double avglen = sumlentime / count;
double stddevtim = 0;
double stddevlen = 0;
#define HISTOGRAMSIZE 31
int histo[HISTOGRAMSIZE];
memset( histo, 0, sizeof( histo ) );
for( i = 0; i < dpmax; i++ )
{
int sweeptime = DATASWEEP[dev][sen][swe][i];
int datalen = DATALENGTH[dev][sen][swe][i];
if( sweeptime < 0 ) continue;
double Sdiff = sweeptime - avgsweep;
double Ldiff = datalen - avglen;
stddevtim += Sdiff * Sdiff;
stddevlen += Ldiff * Ldiff;
//Cast a wider net for the histogram.
//Sdiff/=4;
int llm = Sdiff + (HISTOGRAMSIZE/2.0);
if( llm < 0 ) llm = 0;
if( llm >= HISTOGRAMSIZE ) llm = HISTOGRAMSIZE-1;
histo[llm]++;
}
if( cullcount > 100 )
{
fprintf( stderr, "WARNING: %s%s%02d has %d out-of-window hits. Broken disambiguator?\n", Devices[dev], DevMap[swe], sen, cullcount );
}
stddevtim /= count;
stddevlen /= count;
if( stddevtim > 55 )
{
fprintf( stderr, "DROPPED: %s%s%02d dropped because stddev (%f) was too high.\n", Devices[dev], DevMap[swe], sen, stddevtim );
continue;
}
if( count < 1000 )
{
fprintf( stderr, "DROPPED: %s%s%02d dropped because of insufficient (%d) points.\n", Devices[dev], DevMap[swe], sen, count );
continue;
}
fprintf( hists, "%s%s%02d, ", Devices[dev], DevMap[swe], sen );
for( i = 0; i < HISTOGRAMSIZE; i++ )
{
fprintf( hists, "%d, ", histo[i] );
}
fprintf( hists, "\n" );
printf( "%s %s %d %d %f %f %f %f\n", Devices[dev], DevMap[swe], sen, count, avgsweep, avglen, stddevtim, stddevlen );
}
}
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