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//Copyright 2016 <>< C. N. Lohr, FULLY Under MIT/x11 License.
//All MIT/x11 Licensed Code in this file may be relicensed freely under the GPL or LGPL licenses.
#include <survive.h>
#include "survive_internal.h"
#include <stdio.h>
#include <stdlib.h>
#include <jsmn.h>
#include <string.h>
#include <zlib.h>
static int jsoneq(const char *json, jsmntok_t *tok, const char *s) {
if (tok->type == JSMN_STRING && (int) strlen(s) == tok->end - tok->start &&
strncmp(json + tok->start, s, tok->end - tok->start) == 0) {
return 0;
}
return -1;
}
struct SurviveContext * survive_init( void(*ff)( struct SurviveContext * ctx, const char * fault ), void(*notefunction)( struct SurviveContext * ctx, const char * note ) )
{
int r = 0;
struct SurviveContext * ctx = calloc( 1, sizeof( struct SurviveContext ) );
ctx->faultfunction = ff;
ctx->notefunction = notefunction;
ctx->headset.sensors = 32;
ctx->headset.ctx = ctx;
memcpy( ctx->headset.codename, "HED", 4 );
ctx->watchman[0].sensors = 16;
ctx->watchman[0].ctx = ctx;
memcpy( ctx->watchman[0].codename, "CT0", 4 );
ctx->watchman[1].sensors = 16;
ctx->watchman[1].ctx = ctx;
memcpy( ctx->watchman[1].codename, "CT1", 4 );
//USB must happen last.
if( r = survive_usb_init( ctx ) )
{
//TODO: Cleanup any libUSB stuff sitting around.
return 0;
}
#if 1
//Next, pull out the config stuff.
{
char * ct0conf = 0;
int len = survive_get_config( &ct0conf, ctx, 1, 0 );
if( len > 0 )
{
//From JSMN example.
jsmn_parser p;
jsmntok_t t[4096];
jsmn_init(&p);
int i;
int r = jsmn_parse(&p, ct0conf, len, t, sizeof(t)/sizeof(t[0]));
if (r < 0) {
SV_ERROR("Failed to parse JSON in HMD configuration: %d\n", r);
return 0;
}
if (r < 1 || t[0].type != JSMN_OBJECT) {
SV_ERROR("Object expected in HMD configuration\n");
return 0;
}
for (i = 1; i < r; i++) {
jsmntok_t * tk = &t[i];
char ctxo[100];
int ilen = tk->end - tk->start;
if( ilen > 99 ) ilen = 99;
memcpy(ctxo, ct0conf + tk->start, ilen);
ctxo[ilen] = 0;
// printf( "%d / %d / %d / %d %s %d\n", tk->type, tk->start, tk->end, tk->size, ctxo, jsoneq(ct0conf, &t[i], "modelPoints") );
if (jsoneq(ct0conf, &t[i], "modelPoints") == 0) {
int k;
int pts = t[i+1].size;
ctx->headset.nr_locations = 0;
ctx->headset.sensor_locations = malloc( sizeof( *ctx->headset.sensor_locations) * 32 * 3 );
for( k = 0; k < pts; k++ )
{
tk = &t[i+2+k*4];
float vals[3];
int m;
for( m = 0; m < 3; m++ )
{
char ctt[128];
tk++;
int elemlen = tk->end - tk->start;
if( tk->type != 4 || elemlen > sizeof( ctt )-1 )
{
SV_ERROR( "Parse error in JSON\n" );
break;
}
memcpy( ctt, ct0conf + tk->start, elemlen );
ctt[elemlen] = 0;
float f = atof( ctt );
//printf( "%f%c", f, (m==2)?'\n':',' );
int id = ctx->headset.nr_locations*3+m;
ctx->headset.sensor_locations[id] = f;
}
ctx->headset.nr_locations++;
}
}
}
}
else
{
//TODO: Cleanup any remaining USB stuff.
return 0;
}
}
#endif
//ctx->headset->photos = malloc( ctx->headset->sensors * sizeof(struct SurvivePhoto) );
return ctx;
}
void survive_close( struct SurviveContext * ctx )
{
survive_usb_close( ctx );
}
int survive_poll( struct SurviveContext * ctx )
{
survive_usb_poll( ctx );
}
int survive_simple_inflate( struct SurviveContext * ctx, const char * input, int inlen, char * output, int outlen )
{
z_stream zs; //Zlib stream. May only be used by configuration at beginning and by USB thread periodically.
memset( &zs, 0, sizeof( zs ) );
inflateInit( &zs ); ///Consider checking error
//XXX: Todo: If we find that this is not useful past the beginning (nix this here and move into the configuration getter)
zs.avail_in = inlen;
zs.next_in = (z_const Bytef *)input;
zs.avail_out = outlen;
zs.next_out = output;
if( inflate( &zs, Z_FINISH) != Z_STREAM_END )
{
printf( "Zissue\n" );
SV_INFO("survive_simple_inflate could not inflate." );
return -1;
}
int len = zs.total_out;
inflateEnd( &zs );
return len;
}
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