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66e2bdfaac671f9914ff74345d274a0ced46741c
CCD_Capture/client.c
Edward Emelianov 66e2bdfaac cont
2026-06-08 17:09:05 +03:00

640 lines
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/*
* This file is part of the CCD_Capture project.
* Copyright 2022 Edward V. Emelianov <edward.emelianoff@gmail.com>.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
// client-side functions
#include <stdatomic.h>
#include <math.h> // isnan
#include <signal.h>
#include <stdio.h>
#include <string.h>
#include <sys/socket.h>
#include <usefull_macros.h>
#include "ccdfunc.h" // framerate
#include "client.h"
#include "cmdlnopts.h"
#ifdef IMAGEVIEW
#include "imageview.h"
#endif
#include "server.h" // for common commands names
#include "socket.h"
extern double answer_timeout;
static char sendbuf[BUFSIZ];
static char *lastfilename = NULL;
// send message and wait any answer
#define SENDMSG(...) do{DBG("SENDMSG"); snprintf(sendbuf, BUFSIZ-1, __VA_ARGS__); verbose(2, "\t> %s", sendbuf); if(!cc_sendstrmessage(sock, sendbuf)) ERRX("Server disconnected"); while(getans(sock, NULL));} while(0)
// send message and wait answer starting with 'cmd'
#define SENDMSGW(cmd, ...) do{DBG("SENDMSGW"); snprintf(sendbuf, BUFSIZ-1, cmd __VA_ARGS__); verbose(2, "\t> %s", sendbuf); if(!cc_sendstrmessage(sock, sendbuf)) ERRX("Server disconnected");}while(!getans(sock, cmd))
// send command and wait for answer on it
#define SENDCMDW(cmd) do{DBG("SENDCMDW"); strncpy(sendbuf, cmd, BUFSIZ-1); verbose(2, "\t> %s", sendbuf); if(!cc_sendstrmessage(sock, sendbuf)) ERRX("Server disconnected");}while(!getans(sock, cmd))
static volatile atomic_int expstate = CAMERA_CAPTURE;
static int xm0,ym0,xm1,ym1; // max format
static int xc0,yc0,xc1,yc1; // current format
static volatile atomic_int grabno = 0;
static int oldgrabno = 0;
// IPC key for shared memory
static cc_IMG ima = {0}, *shmima = NULL; // ima - local storage, shmima - shm (if available)
static size_t imbufsz = 0; // image buffer for allocated `ima`
static uint8_t *imbuf = NULL; // we can't use shmima->data as it belongs to server, so we use `imbuf` and set ima.data = imbuf
static int current_image_number = -1; // for net-parser - last number of exposed image
#if 0
// read message from queue or file descriptor
static char *readmsg(int fd){
static cc_strbuff *buf = NULL;
if(!buf) buf = cc_strbufnew(BUFSIZ, 256);
int test(){
size_t got = cc_getline(buf);
if(got > 255){
DBG("Client fd=%d gave buffer overflow", fd);
LOGMSG("SERVER client fd=%d buffer overflow", fd);
}else if(got){
return TRUE;
}
return FALSE;
}
if(test()) return buf->string;
if(1 == sl_canread(fd)){
if(cc_read2buf(fd, buf)){
if(test()) return buf->string;
}else ERRX("Server disconnected");
}
return NULL;
}
#endif
#define CMP_ANS(cmd, ans) strncmp(cmd, ans, sizeof(cmd)-1)
// parser of CCD server messages; return TRUE to exit from polling cycle of `getans` (if receive 'FAIL', 'OK' or 'BUSY')
static cc_hresult parseans(char *ans){
if(!ans) return CC_RESULT_BADKEY;
//TIMESTAMP("parseans() begin");
//DBG("Parsing of '%s'", ans);
if(0 == strcmp(cc_hresult2str(CC_RESULT_OK), ans)) return CC_RESULT_OK;
for(cc_hresult res = CC_RESULT_BUSY; res < CC_RESULT_NUM; ++res){
const char *resmsg = cc_hresult2str(res);
if(0 == strcmp(resmsg, ans)){
verbose(1, "Server answered: %s", resmsg);
return res;
}
}
char *val = cc_get_keyval(&ans); // now `ans` is a key and `val` its value
if(0 == CMP_ANS(CC_CMD_EXPSTATE, ans)){
int st = atoi(val);
atomic_store(&expstate, st);
DBG("Current state: %d", atomic_load(&expstate));
return CC_RESULT_SILENCE;
}else if(0 == CMP_ANS(CC_CMD_FRAMEMAX, ans)){
sscanf(val, "%d,%d,%d,%d", &xm0, &ym0, &xm1, &ym1);
DBG("Got maxformat: %d,%d,%d,%d", xm0, ym0, xm1, ym1);
return CC_RESULT_SILENCE;
}else if(0 == CMP_ANS(CC_CMD_FRAMEFORMAT, ans)){
sscanf(val, "%d,%d,%d,%d", &xc0, &yc0, &xc1, &yc1);
DBG("Got current format: %d,%d,%d,%d", xc0, yc0, xc1, yc1);
return CC_RESULT_SILENCE;
}else if(0 == CMP_ANS(CC_CMD_IMNUMBER, ans)){
current_image_number = atoi(val);
}
//TIMESTAMP("parseans() end");
return CC_RESULT_SILENCE; // echo of sent command or something else
}
// read until timeout all messages from server; return FALSE if there was no messages from server
// if msg != NULL - wait for it in answer
static int getans(int sock, const char *msg){
double t0 = sl_dtime();
char buf[BUFSIZ+1];
int idx = 0;
char *ans = NULL;
TIMESTAMP("GetAns(%s)", msg);
double tmout = answer_timeout + 5.; // make first timeout larger for slow networks
// TODO: increase first timeout up to 15-30s (add key?)
cc_hresult res = CC_RESULT_FAIL;
while(sl_dtime() - t0 < tmout){
ans = NULL;
if(1 == sl_canread(sock)){
ssize_t got = read(sock, buf+idx, BUFSIZ-idx);
if(got > 0){
idx += got;
buf[idx] = 0;
char *nl = strchr(buf, '\n');
if(nl){
*nl = 0;
ans = buf;
DBG("got '%s'", ans);
}
}
}
if(!ans) continue;
// got answer -> make timeout less
tmout = answer_timeout;
t0 = sl_dtime();
TIMESTAMP("Got from server: %s", ans);
verbose(1, "\t%s", ans);
DBG("1 msg-> %s, ans -> %s", msg, ans);
res = parseans(ans);
DBG("2 msg-> %s, ans -> %s; result: %d", msg, ans, res);
if(msg){
if(res != CC_RESULT_SILENCE || strncmp(ans, msg, strlen(msg))) continue;
else res = CC_RESULT_OK;
}
DBG("Got answer -> break");
break;
}
TIMESTAMP("GetAns(%s), ans: '%s', result: %d", msg, ans, res);
if(!ans) DBG("Got no answer from server; result=%d", res);
if(res == CC_RESULT_OK) return TRUE;
return FALSE;
}
/**
* @brief processData - process here some actions and make messages for server
*/
static void send_headers(int sock){
if(GP->plugincmd){
char **p = GP->plugincmd;
green("Send custom plugin commands\n");
while(p && *p){
printf("\t%s\n", *p);
SENDMSGW(CC_CMD_PLUGINCMD, "=%s", *p);
++p;
}
while(getans(sock, NULL));
}
if(GP->exptime > -DBL_EPSILON) SENDMSGW(CC_CMD_EXPOSITION, "=%g", GP->exptime);
DBG("infty=%d", GP->infty);
if(GP->infty > -1) SENDMSGW(CC_CMD_INFTY, "=%d", GP->infty);
// common information
if(GP->listdevices) SENDCMDW(CC_CMD_CAMLIST);
if(GP->camdevno > -1) SENDMSGW(CC_CMD_CAMDEVNO, "=%d", GP->camdevno);
if(GP->info){
SENDCMDW(CC_CMD_HBIN);
SENDCMDW(CC_CMD_VBIN);
SENDCMDW(CC_CMD_CAMTEMPER);
SENDCMDW(CC_CMD_EXPOSITION);
SENDCMDW(CC_CMD_EXPSTATE);
}
// focuser
if(GP->listdevices) SENDMSG(CC_CMD_FOCLIST);
if(GP->focdevno > -1) SENDMSG(CC_CMD_FDEVNO "=%d", GP->focdevno);
if(GP->info){
SENDCMDW(CC_CMD_FGOTO);
SENDCMDW(CC_CMD_FMINPOS);
SENDCMDW(CC_CMD_FMAXPOS);
SENDCMDW(CC_CMD_FTEMP);
}
if(!isnan(GP->gotopos)){
SENDMSGW(CC_CMD_FGOTO, "=%g", GP->gotopos);
}
// wheel
if(GP->listdevices) SENDCMDW(CC_CMD_WLIST);
if(GP->whldevno > -1) SENDMSGW(CC_CMD_WDEVNO, "=%d", GP->whldevno);
if(GP->info){
SENDCMDW(CC_CMD_WPOS);
SENDCMDW(CC_CMD_WMAXPOS);
SENDCMDW(CC_CMD_WTEMP);
}
if(GP->setwheel > -1) SENDMSGW(CC_CMD_WPOS, "=%d", GP->setwheel);
DBG("nxt");
// CCD/CMOS
if(GP->X0 > INT_MIN || GP->Y0 > INT_MIN || GP->X1 > INT_MIN || GP->Y1 > INT_MIN){ // set format
SENDCMDW(CC_CMD_FRAMEMAX);
SENDCMDW(CC_CMD_FRAMEFORMAT);
// default values
if(GP->X0 == INT_MIN) GP->X0 = xc0;
if(GP->X1 == INT_MIN) GP->X1 = xc1;
if(GP->Y0 == INT_MIN) GP->Y0 = yc0;
if(GP->Y1 == INT_MIN) GP->Y1 = yc1;
// limiting values
if(GP->X0 < 0) GP->X0 = xm0;
else if(GP->X0 > xm1-1) GP->X0 = xm1-1;
if(GP->Y0 < 0) GP->Y0 = ym0;
else if(GP->Y0 > ym1-1) GP->Y0 = ym1-1;
if(GP->X1 < GP->X0+1 || GP->X1 > xm1) GP->X1 = xm1;
if(GP->Y1 < GP->Y0+1 || GP->Y1 > ym1) GP->Y1 = ym1;
DBG("set format: (%d,%d)x(%d,%d)", GP->X0,GP->X1,GP->Y0,GP->Y1);
SENDMSGW(CC_CMD_FRAMEFORMAT, "=%d,%d,%d,%d", GP->X0, GP->Y0, GP->X1, GP->Y1);
}
if(GP->cancelexpose) SENDMSGW(CC_CMD_EXPSTATE, "=%d", CAMERA_IDLE);
if(GP->hbin) SENDMSGW(CC_CMD_HBIN, "=%d", GP->hbin);
if(GP->vbin) SENDMSGW(CC_CMD_VBIN, "=%d", GP->vbin);
if(!isnan(GP->temperature)) SENDMSGW(CC_CMD_CAMTEMPER, "=%g", GP->temperature);
if(GP->shtr_cmd > -1) SENDMSGW(CC_CMD_SHUTTER, "=%d", GP->shtr_cmd);
if(GP->confio > -1) SENDMSGW(CC_CMD_CONFIO, "=%d", GP->confio);
if(GP->setio > -1) SENDMSGW(CC_CMD_IO, "=%d", GP->setio);\
if(!isnan(GP->gain)) SENDMSGW(CC_CMD_GAIN, "=%g", GP->gain);
if(!isnan(GP->brightness)) SENDMSGW(CC_CMD_BRIGHTNESS, "=%g", GP->brightness);
if(GP->nflushes > 0) SENDMSGW(CC_CMD_NFLUSHES, "=%d", GP->nflushes);
if(GP->exptime > -DBL_EPSILON){ // exposition and reading control: only if start of exposition
if(GP->_8bit) SENDMSGW(CC_CMD_8BIT, "=1");
else SENDMSGW(CC_CMD_8BIT, "=0");
if(GP->fast) SENDMSGW(CC_CMD_FASTSPD, "=1");
else SENDMSGW(CC_CMD_FASTSPD, "=0");
if(GP->dark) SENDMSGW(CC_CMD_DARK, "=1");
else SENDMSGW(CC_CMD_DARK, "=0");
}
// FITS header keywords:
#define CHKHDR(x, cmd) do{if(x) SENDMSG(cmd "=%s", x);}while(0)
CHKHDR(GP->author, CC_CMD_AUTHOR);
CHKHDR(GP->instrument, CC_CMD_INSTRUMENT);
CHKHDR(GP->observers, CC_CMD_OBSERVER);
CHKHDR(GP->objname, CC_CMD_OBJECT);
CHKHDR(GP->prog_id, CC_CMD_PROGRAM);
CHKHDR(GP->objtype, CC_CMD_OBJTYPE);
#undef CHKHDR
}
/**
* @brief readNbytes - read `N` bytes from descriptor `fd` into buffer *buf
* @return false if failed
*/
static int readNbytes(int fd, size_t N, uint8_t *buf){
size_t got = 0, need = N;
double t0 = sl_dtime();
while(sl_dtime() - t0 < CC_CLIENT_TIMEOUT /*&& sl_canread(fd)*/ && need){
t0 = sl_dtime();
ssize_t rd = read(fd, buf + got, need);
if(rd <= 0){
if(errno == EAGAIN || errno == EWOULDBLOCK) continue;
WARNX("Server disconnected");
signals(1);
}
got += rd; need -= rd;
}
if(need) return FALSE; // didn't got whole packet
return TRUE;
}
/**
* @brief getimage - read image from shared memory or socket
* @param askheader == TRUE for storing FITS-header
* @return FALSE if failed to catch image
*/
static int getimage(int askheader){
FNAME();
int imsock = -1, shmlocked = FALSE, ret = FALSE;
static double oldtimestamp = -1.;
TIMESTAMP("Get image sizes");
if(shmima){ // read image from shared memory
DBG("Try to read from SHM");
double t0 = sl_dtime();
while(sl_dtime() - t0 < MUTEX_LOCK_TMOUT){
if(cc_lock_shm(FALSE)){
DBG("Locked");
shmlocked = TRUE;
break;
}
usleep(100);
}
if(!shmlocked){
WARNX("Can't lock shared memory");
return FALSE;
}
memcpy(&ima, shmima, sizeof(cc_IMG));
}else{ // get image by socket
if(imsock < 0){
DBG("Open socket @ %s", GP->imageport);
imsock = cc_open_socket(FALSE, GP->imageport, TRUE);
}
if(imsock < 0) ERRX("getimage(): can't open image transport socket");
// get image size
if(!readNbytes(imsock, sizeof(cc_IMG), (uint8_t*)&ima)){
WARNX("Can't read image header");
goto eofg;
}
}
if(ima.MAGICK != CC_SHM_MAGIC){
WARNX("Wrong image: bad magick");
goto eofg;
}
if(ima.bytelen < 1){
WARNX("Wrong image size");
goto eofg;
}
DBG("bytelen=%zd, w=%d, h=%d; bitpix=%d", ima.bytelen, ima.w, ima.h, ima.bitpix);
// realloc memory if needed
if(imbufsz < ima.bytelen){
size_t newsz = 1024 * (1 + ima.bytelen / 1024);
DBG("Reallocate memory from %zd to %zd", imbufsz, newsz);
imbufsz = newsz;
imbuf = realloc(imbuf, imbufsz);
}
ima.data = imbuf; // renew this value each time after getting `ima` from server
TIMESTAMP("Start of data read");
if(shmima){
uint8_t *datastart = ((uint8_t*)shmima) + sizeof(cc_IMG);
DBG("first image byte: %d", *datastart);
memcpy(imbuf, datastart, ima.bytelen);
TIMESTAMP("Got by shared memory");
if(!askheader){
cc_unlock_shm();
shmlocked = FALSE;
}
ret = TRUE;
}else{
if(!readNbytes(imsock, ima.bytelen, imbuf)){
WARNX("Can't read image data");
goto eofg;
}
ret = TRUE;
TIMESTAMP("Got by socket");
}
DBG("timestamps new-old=%g; imno: %zd", ima.timestamp - oldtimestamp, ima.imnumber);
if(ima.timestamp != oldtimestamp){ // test if image is really new
oldtimestamp = ima.timestamp;
atomic_store(&grabno, ima.imnumber);
TIMESTAMP("Got image #%zd", ima.imnumber);
if(askheader){ // read FITS-header for later saving
if(shmima){
size_t rsz = FLEN_CARD * ima.headerstrings;
memcpy(ima.fitsheader, shmima->fitsheader, rsz);
}else{
uint8_t card[FLEN_CARD];
for(size_t i = 0; i < ima.headerstrings; ++i){
if(!readNbytes(imsock, FLEN_CARD, card)){
WARNX("Can't read full header, got %zd records from %zd", i, ima.headerstrings);
break;
}
memcpy(&ima.fitsheader[i], card, FLEN_CARD);
}
}
if(GP->addhdr){ // add records from client-side files
char **nxtfile = GP->addhdr;
while(*nxtfile){
cc_kwfromfile(&ima, *(nxtfile++));
}
}
}else ima.headerstrings = 0;
}else WARNX("Still got old image");
eofg:
if(imsock != -1) close(imsock); // reopen in next time in case of error
if(shmlocked) cc_unlock_shm();
return ret;
}
// get number of current image; return number or -1 if got error/timeout
static int curImNo(int sock){
if(shmima){
if(!cc_lock_shm(FALSE)) return -1;
int CurNo = shmima->imnumber;
cc_unlock_shm();
return CurNo;
}
// no shared memory: try to get number over TCP
SENDCMDW(CC_CMD_IMNUMBER);
return current_image_number;
}
void client(int sock){
if(sock < 0) ERRX("Can't run without command socket");
if(!GP->forceimsock && !shmima){ // init shm buffer if user don't ask to force workign through image socket
shmima = cc_getshm(GP->shmkey, 0); // try to init client shm
cc_init_sem(FALSE);
DBG("Got access to shared memory: %s", shmima ? "OK" : "FAIL");
}
if(GP->restart){
SENDCMDW(CC_CMD_RESTART);
return;
}
TIMEINIT();
send_headers(sock);
TIMESTAMP("Got headers");
double t0 = sl_dtime(), tw, tstart;
int Nremain = 0, nframe = 1;
// if client gives filename/prefix or Nframes, make exposition
if((GP->outfile && *GP->outfile) || (GP->outfileprefix && *GP->outfileprefix) || GP->nframes > 0){
Nremain = GP->nframes;
if(Nremain < 1) Nremain = 1;
SENDMSGW(CC_CMD_EXPSTATE, "=%d", CAMERA_CAPTURE); // call to start capture
} else return; // just send headers and exit
double timeout = CC_CLIENT_TIMEOUT;
verbose(1, "Exposing frame 1...");
atomic_store(&expstate, CAMERA_CAPTURE); // could be changed earlier
DBG("Current state: %d", atomic_load(&expstate));
verbose(2, "Wait for exposition end");
t0 = sl_dtime();
tw = tstart = t0;
int lastImNo = curImNo(sock);
while(sl_dtime() - t0 < timeout){
if(sl_dtime() - tw > CC_WAIT_TIMEOUT){
SENDCMDW(CC_CMD_TREMAIN); // get remained time
tw = sl_dtime();
}
if(sl_dtime() - tstart < GP->exptime){
t0 = sl_dtime(); // refresh timeout until exp not ends
continue;
}else{
SENDCMDW(CC_CMD_EXPSTATE);
}
int curst = atomic_load(&expstate);
DBG("Current state: %d", curst);
if(curst == CAMERA_ERROR){
WARNX(_("Can't make exposition"));
if(Nremain > 1){
verbose(1, "Exposing frame %d...", nframe);
SENDMSGW(CC_CMD_EXPSTATE, "=%d", CAMERA_CAPTURE);
tstart = sl_dtime();
}
continue;
}
if(curst == CAMERA_FRAMERDY){
atomic_store(&expstate, CAMERA_IDLE);
int cur = curImNo(sock);
DBG("Current state: %d, imno: %d", atomic_load(&expstate), cur);
if(Nremain > 1){ // start next capture
verbose(1, "Exposing frame %d...", nframe);
SENDMSGW(CC_CMD_EXPSTATE, "=%d", CAMERA_CAPTURE);
tstart = sl_dtime();
}
int failed = TRUE;
if(lastImNo < cur){
lastImNo = cur;
verbose(2, "Frame ready, try to grab");
if(!getimage(TRUE)){
WARNX("Can't get next image");
}else{
if(saveFITS(&ima, &lastfilename)){
--Nremain;
++nframe;
failed = FALSE;
}
}
}else verbose(2, "Got already saved image, wait next");
if(failed && Nremain == 1){ // last image -> should re-expose
verbose(1, "Exposing frame %d...", nframe);
SENDMSGW(CC_CMD_EXPSTATE, "=%d", CAMERA_CAPTURE);
tstart = sl_dtime();
}
if(Nremain > 0){
if(GP->pause_len > 0){
double delta, time1 = sl_dtime() + GP->pause_len;
while(1){
SENDCMDW(CC_CMD_CAMTEMPER);
if((delta = time1 - sl_dtime()) < __FLT_EPSILON__) break;
if(delta > 1.) verbose(1, _("%d seconds till pause ends\n"), (int)delta);
if(delta > 6.) sleep(5);
else if(delta > 1.) sleep((int)delta);
else usleep((int)(delta*1e6 + 1));
}
}
}else{
DBG("All images saved -> exit");
break;
}
}
}
if(Nremain > 0) WARNX(_("Server timeout"));
}
#ifdef IMAGEVIEW
static int controlfd = -1; // control socket FD
void init_grab_sock(int sock){
if(sock < 0) ERRX("Can't run without command socket");
controlfd = sock;
send_headers(sock);
if(!GP->forceimsock && !shmima){ // init shm buffer if user don't ask to work through image socket
shmima = cc_getshm(GP->shmkey, 0); // try to init client shm
cc_init_sem(FALSE);
}
}
// grab image for active viewer
static void *grabnext(void _U_ *arg){
FNAME();
if(controlfd < 0) return NULL;
int sock = controlfd;
int lastImNo = curImNo(sock);
while(1){
if(!getWin()) exit(1);
TIMESTAMP("End of cycle, start new");
atomic_store(&expstate, CAMERA_CAPTURE);
DBG("Current state: %d", atomic_load(&expstate));
TIMEINIT();
SENDMSGW(CC_CMD_EXPSTATE, "=%d", CAMERA_CAPTURE); // start capture
double timeout = GP->exptime + CC_CLIENT_TIMEOUT, t0 = sl_dtime();
useconds_t sleept = 500000; // 0.5s
if(GP->exptime < 0.5){
sleept = (useconds_t)(GP->exptime * 250000.); // a quater of exposition time
if(sleept < CC_IMWAIT_SLEEP) sleept = CC_IMWAIT_SLEEP;
}
TIMESTAMP("Wait for exposition ends (%g s), sleep for %dus", timeout, sleept);
int curst = CAMERA_CAPTURE;
while(sl_dtime() - t0 < timeout){
DBG("start sleep for %dus", sleept);
usleep(sleept);
SENDCMDW(CC_CMD_EXPSTATE);
curst = atomic_load(&expstate);
if(curst != CAMERA_CAPTURE) break;
if(sl_dtime() - t0 > GP->exptime && sleept != CC_IMWAIT_SLEEP){
DBG("Set sleeping time to %dus", sleept);
sleept = CC_IMWAIT_SLEEP;
}
}
int cur = curImNo(sock);
if(sl_dtime() - t0 >= timeout || curst != CAMERA_FRAMERDY || cur <= lastImNo){
WARNX("Image wasn't received, state: %d, waiting: %g, lastNo: %d, curNo: %d (timeout: %g)", curst, sl_dtime() - t0, lastImNo, cur, timeout);
continue;
}
lastImNo = cur;
TIMESTAMP("Frame ready (%d from server's start)", cur);
getimage(FALSE);
}
return NULL;
}
// passive waiting for next image
static void *waitimage(void _U_ *arg){
FNAME();
if(controlfd < 0) return NULL;
int sock = controlfd;
int lastImNo = curImNo(sock);
double t0 = sl_dtime();
while(1){
if(!getWin()) exit(1);
double tcur = sl_dtime();
if(tcur - t0 >= CC_WAIT_TIMEOUT){
SENDCMDW(CC_CMD_EXPSTATE); // `ping` server to know if it disconnected
t0 = tcur;
}
int cur = curImNo(sock);
if(cur <= lastImNo){
usleep(CC_IMWAIT_SLEEP);
continue;
}
lastImNo = cur;
TIMESTAMP("End of cycle #%d, start new", cur);
TIMEINIT();
getimage(FALSE);
atomic_store(&expstate, CAMERA_IDLE);
DBG("Current state: %d", atomic_load(&expstate));
}
return NULL;
}
// try to capture images for viewer
int sockcaptured(cc_IMG **imgptr){
//TIMESTAMP("sockcaptured() start");
if(!imgptr) return FALSE;
static pthread_t grabthread = 0;
if(controlfd < 0) return FALSE;
if(imgptr == (void*)-1){ // kill `grabnext`
DBG("Wait for grabbing thread");
if(grabthread){
pthread_cancel(grabthread);
pthread_join(grabthread, NULL);
grabthread = 0;
}
DBG("OK");
return FALSE;
}
if(!grabthread || pthread_kill(grabthread, 0)){ // start new grab
if(GP->viewer){
TIMEINIT();
DBG("\n\n\nStart new waiting");
if(pthread_create(&grabthread, NULL, &waitimage, NULL)){
WARN("Can't create waiting thread");
grabthread = 0;
}
}else{
TIMEINIT();
DBG("\n\n\nStart new grab");
if(pthread_create(&grabthread, NULL, &grabnext, NULL)){
WARN("Can't create grabbing thread");
grabthread = 0;
}
}
}else{ // grab in process
int curno = atomic_load(&grabno);
if(curno != oldgrabno){ // image is ready
TIMESTAMP("Image #%d ready", curno);
if(*imgptr && (*imgptr != &ima)) free(*imgptr);
*imgptr = &ima;
oldgrabno = curno;
framerate();
//TIMESTAMP("sockcaptured() end, return TRUE");
return TRUE;
}
}
//TIMESTAMP("sockcaptured() end, return FALSE");
return FALSE;
}
// IMAGEVIEW
#endif
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