int zbar_process_one (zbar_processor_t *proc, int timeout) { proc_enter(proc); int streaming = proc->streaming; _zbar_mutex_unlock(&proc->mutex); int rc = 0; if(!proc->video) { rc = err_capture(proc, SEV_ERROR, ZBAR_ERR_INVALID, __func__, "video input not initialized"); goto done; } if(!streaming) { rc = zbar_processor_set_active(proc, 1); if(rc) goto done; } zbar_timer_t timer; rc = _zbar_processor_wait(proc, EVENT_OUTPUT, _zbar_timer_init(&timer, timeout)); if(!streaming && zbar_processor_set_active(proc, 0)) rc = -1; done: _zbar_mutex_lock(&proc->mutex); proc_leave(proc); return(rc); }
static int processor_set_bool (zbarProcessor *self, PyObject *value, void *closure) { if(!value) { PyErr_SetString(PyExc_TypeError, "cannot delete attribute"); return(-1); } int rc, val = PyObject_IsTrue(value); if(val < 0) return(-1); switch((intptr_t)closure) { case 0: rc = zbar_processor_set_visible(self->zproc, val); break; case 1: rc = zbar_processor_set_active(self->zproc, val); break; default: assert(0); return(-1); } if(rc < 0) { zbarErr_Set((PyObject*)self); return(-1); } return(0); }
int main (int argc, char **argv) { const char *device = "/dev/video0"; /* create a Processor */ zbar_processor_t *proc = zbar_processor_create(1); /* configure the Processor */ zbar_processor_set_config(proc, 0, ZBAR_CFG_ENABLE, 1); /* initialize the Processor */ if(argc > 1) device = argv[1]; zbar_processor_init(proc, device, 1); /* setup a callback */ zbar_processor_set_data_handler(proc, my_handler, NULL); /* enable the preview window */ zbar_processor_set_visible(proc, 1); zbar_processor_set_active(proc, 1); /* keep scanning until user provides key/mouse input */ zbar_processor_user_wait(proc, -1); /* clean up */ zbar_processor_destroy(proc); return(0); }
int zbar_processor_init (zbar_processor_t *proc, const char *dev, int enable_display) { if(proc->video) zbar_processor_set_active(proc, 0); if(proc->window && !proc->input_thread.started) _zbar_processor_close(proc); _zbar_mutex_lock(&proc->mutex); _zbar_thread_stop(&proc->input_thread, &proc->mutex); _zbar_thread_stop(&proc->video_thread, &proc->mutex); _zbar_processor_lock(proc); _zbar_mutex_unlock(&proc->mutex); if(proc->window) { zbar_window_destroy(proc->window); proc->window = NULL; } int rc = 0; if(proc->video) { zbar_video_destroy(proc->video); proc->video = NULL; } if(!dev && !enable_display) /* nothing to do */ goto done; if(enable_display) { proc->window = zbar_window_create(); if(!proc->window) { rc = err_capture(proc, SEV_FATAL, ZBAR_ERR_NOMEM, __func__, "allocating window resources"); goto done; } } if(dev) { proc->video = zbar_video_create(); if(!proc->video) { rc = err_capture(proc, SEV_FATAL, ZBAR_ERR_NOMEM, __func__, "allocating video resources"); goto done; } if(proc->req_width || proc->req_height) zbar_video_request_size(proc->video, proc->req_width, proc->req_height); if(proc->req_intf) zbar_video_request_interface(proc->video, proc->req_intf); if((proc->req_iomode && zbar_video_request_iomode(proc->video, proc->req_iomode)) || zbar_video_open(proc->video, dev)) { rc = err_copy(proc, proc->video); goto done; } } /* spawn blocking video thread */ int video_threaded = (proc->threaded && proc->video && zbar_video_get_fd(proc->video) < 0); if(video_threaded && _zbar_thread_start(&proc->video_thread, proc_video_thread, proc, &proc->mutex)) { rc = err_capture(proc, SEV_ERROR, ZBAR_ERR_SYSTEM, __func__, "spawning video thread"); goto done; } /* spawn input monitor thread */ int input_threaded = (proc->threaded && (proc->window || (proc->video && !video_threaded))); if(input_threaded && _zbar_thread_start(&proc->input_thread, proc_input_thread, proc, &proc->mutex)) { rc = err_capture(proc, SEV_ERROR, ZBAR_ERR_SYSTEM, __func__, "spawning input thread"); goto done; } if(proc->window && !input_threaded && (rc = proc_open(proc))) goto done; if(proc->video && proc->force_input) { if(zbar_video_init(proc->video, proc->force_input)) rc = err_copy(proc, proc->video); } else if(proc->video) { int retry = -1; if(proc->window) { retry = zbar_negotiate_format(proc->video, proc->window); if(retry) fprintf(stderr, "WARNING: no compatible input to output format\n" "...trying again with output disabled\n"); } if(retry) retry = zbar_negotiate_format(proc->video, NULL); if(retry) { zprintf(1, "ERROR: no compatible %s format\n", (proc->video) ? "video input" : "window output"); rc = err_capture(proc, SEV_ERROR, ZBAR_ERR_UNSUPPORTED, __func__, "no compatible image format"); } } done: _zbar_mutex_lock(&proc->mutex); proc_leave(proc); return(rc); }
int main (int argc, const char *argv[]) { /* setup zbar library standalone processor, * threads will be used if available */ proc = zbar_processor_create(1); if(!proc) { fprintf(stderr, "ERROR: unable to allocate memory?\n"); return(1); } zbar_processor_set_data_handler(proc, data_handler, NULL); const char *video_device = ""; int display = 1; unsigned long infmt = 0, outfmt = 0; int i; for(i = 1; i < argc; i++) { if(argv[i][0] != '-') video_device = argv[i]; else if(argv[i][1] != '-') { int j; for(j = 1; argv[i][j]; j++) { if(argv[i][j] == 'S') { if(!argv[i][++j]) { i++; j = 0; } if(parse_config(&argv[i][j], i, argc, "-S")) return(usage(1)); break; } switch(argv[i][j]) { case 'h': return(usage(0)); case 'v': zbar_increase_verbosity(); break; case 'q': quiet = 1; break; default: fprintf(stderr, "ERROR: unknown bundled config: -%c\n\n", argv[i][j]); return(usage(1)); } } } else if(!argv[i][2]) { if(i < argc - 1) video_device = argv[argc - 1]; break; } else if(!strcmp(argv[i], "--help")) return(usage(0)); else if(!strcmp(argv[i], "--version")) return(printf(PACKAGE_VERSION "\n") <= 0); else if(!strcmp(argv[i], "--set")) { i++; if(parse_config(argv[i], i, argc, "--set")) return(usage(1)); } else if(!strncmp(argv[i], "--set=", 6)) { if(parse_config(&argv[i][6], i, argc, "--set=")) return(usage(1)); } else if(!strcmp(argv[i], "--quiet")) quiet = 1; else if(!strcmp(argv[i], "--xml")) format = XML; else if(!strcmp(argv[i], "--raw")) format = RAW; else if(!strcmp(argv[i], "--nodisplay")) display = 0; else if(!strcmp(argv[i], "--verbose")) zbar_increase_verbosity(); else if(!strncmp(argv[i], "--verbose=", 10)) zbar_set_verbosity(strtol(argv[i] + 10, NULL, 0)); else if(!strncmp(argv[i], "--prescale=", 11)) { char *x = NULL; long int w = strtol(argv[i] + 11, &x, 10); long int h = 0; if(x && *x == 'x') h = strtol(x + 1, NULL, 10); if(!w || !h || !x || *x != 'x') { fprintf(stderr, "ERROR: invalid prescale: %s\n\n", argv[i]); return(usage(1)); } zbar_processor_request_size(proc, w, h); } else if(!strncmp(argv[i], "--v4l=", 6)) { long int v = strtol(argv[i] + 6, NULL, 0); zbar_processor_request_interface(proc, v); } else if(!strncmp(argv[i], "--iomode=", 9)) { long int v = strtol(argv[i] + 9, NULL, 0); zbar_processor_request_iomode(proc, v); } else if(!strncmp(argv[i], "--infmt=", 8) && strlen(argv[i]) == 12) infmt = (argv[i][8] | (argv[i][9] << 8) | (argv[i][10] << 16) | (argv[i][11] << 24)); else if(!strncmp(argv[i], "--outfmt=", 9) && strlen(argv[i]) == 13) outfmt = (argv[i][9] | (argv[i][10] << 8) | (argv[i][11] << 16) | (argv[i][12] << 24)); else { fprintf(stderr, "ERROR: unknown option argument: %s\n\n", argv[i]); return(usage(1)); } } if(infmt || outfmt) zbar_processor_force_format(proc, infmt, outfmt); /* open video device, open window */ if(zbar_processor_init(proc, video_device, display) || /* show window */ (display && zbar_processor_set_visible(proc, 1))) return(zbar_processor_error_spew(proc, 0)); if(format == XML) { #ifdef _WIN32 fflush(stdout); _setmode(_fileno(stdout), _O_BINARY); #endif printf(xml_head, video_device); fflush(stdout); } /* start video */ int active = 1; if(zbar_processor_set_active(proc, active)) return(zbar_processor_error_spew(proc, 0)); /* let the callback handle data */ int rc; while((rc = zbar_processor_user_wait(proc, -1)) >= 0) { if(rc == 'q' || rc == 'Q') break; if(rc == ' ') { active = !active; if(zbar_processor_set_active(proc, active)) return(zbar_processor_error_spew(proc, 0)); } } /* report any errors that aren't "window closed" */ if(rc && rc != 'q' && rc != 'Q' && zbar_processor_get_error_code(proc) != ZBAR_ERR_CLOSED) return(zbar_processor_error_spew(proc, 0)); /* free resources (leak check) */ zbar_processor_destroy(proc); if(format == XML) { printf("%s", xml_foot); fflush(stdout); } return(0); }