int zbar_processor_set_active (zbar_processor_t *proc,
int active)
{
proc_enter(proc);
int rc;
if(!proc->video) {
rc = err_capture(proc, SEV_ERROR, ZBAR_ERR_INVALID, __func__,
"video input not initialized");
goto done;
}
_zbar_mutex_unlock(&proc->mutex);
zbar_image_scanner_enable_cache(proc->scanner, active);
rc = zbar_video_enable(proc->video, active);
if(!rc) {
_zbar_mutex_lock(&proc->mutex);
proc->streaming = active;
_zbar_mutex_unlock(&proc->mutex);
rc = _zbar_processor_enable(proc);
}
else
err_copy(proc, proc->video);
if(!proc->streaming && proc->window) {
if(zbar_window_draw(proc->window, NULL) && !rc)
rc = err_copy(proc, proc->window);
_zbar_processor_invalidate(proc);
}
_zbar_mutex_lock(&proc->mutex);
if(proc->video_thread.started)
_zbar_event_trigger(&proc->video_thread.notify);
done:
proc_leave(proc);
return(rc);
}
/* lock is already held */
static inline int process_image (zebra_processor_t *proc,
zebra_image_t *img)
{
if(img) {
uint32_t format = zebra_image_get_format(img);
zprintf(16, "processing: %.4s(%08" PRIx32 ") %dx%d @%p\n",
(char*)&format, format,
zebra_image_get_width(img), zebra_image_get_height(img),
zebra_image_get_data(img));
/* FIXME locking all other interfaces while processing is conservative
* but easier for now and we don't expect this to take long...
*/
int nsyms = zebra_scan_image(proc->scanner, img);
if(nsyms < 0)
return(err_capture(proc, SEV_ERROR, ZEBRA_ERR_UNSUPPORTED,
__func__, "unknown image format"));
if(_zebra_verbosity >= 8) {
const zebra_symbol_t *sym = zebra_image_first_symbol(img);
while(sym) {
zebra_symbol_type_t type = zebra_symbol_get_type(sym);
int count = zebra_symbol_get_count(sym);
zprintf(8, "%s%s: %s (%s)\n",
zebra_get_symbol_name(type),
zebra_get_addon_name(type),
zebra_symbol_get_data(sym),
(count < 0) ? "uncertain" :
(count > 0) ? "duplicate" : "new");
sym = zebra_symbol_next(sym);
}
}
if(nsyms) {
emit(proc, EVENT_OUTPUT);
if(proc->handler)
/* FIXME only call after filtering (unlocked...?) */
proc->handler(img, proc->userdata);
}
if(proc->force_output) {
img = zebra_image_convert(img, proc->force_output);
if(!img)
return(err_capture(proc, SEV_ERROR, ZEBRA_ERR_UNSUPPORTED,
__func__, "unknown image format"));
}
}
/* display to window if enabled */
if(proc->window &&
(zebra_window_draw(proc->window, img) ||
_zebra_window_invalidate(proc->window)))
return(err_copy(proc, proc->window));
#if 0
/* FIXME still don't understand why we need this */
if(proc->window && _zebra_window_handle_events(proc, 0))
return(-1);
#endif
if(proc->force_output && img)
zebra_image_destroy(img);
return(0);
}
int zebra_processor_init (zebra_processor_t *proc,
const char *dev,
int enable_display)
{
if(proc_lock(proc) < 0)
return(-1);
proc_destroy_thread(proc->video_thread, &proc->video_started);
proc_destroy_thread(proc->input_thread, &proc->input_started);
proc->video_started = proc->input_started = 0;
int rc = 0;
if(proc->video) {
if(dev)
zebra_video_open(proc->video, NULL);
else {
zebra_video_destroy(proc->video);
proc->video = NULL;
}
}
if(proc->window) {
zebra_window_destroy(proc->window);
proc->window = NULL;
_zebra_window_close(proc);
}
if(!dev && !enable_display)
/* nothing to do */
goto done;
if(enable_display) {
proc->window = zebra_window_create();
if(!proc->window) {
rc = err_copy(proc, proc->window);
goto done;
}
}
if(dev) {
proc->video = zebra_video_create();
if(!proc->video ||
zebra_video_open(proc->video, dev)) {
rc = err_copy(proc, proc->video);
goto done;
}
if(zebra_video_get_fd(proc->video) < 0 && proc->threaded) {
#ifdef HAVE_LIBPTHREAD
/* spawn blocking video thread */
if((rc = pthread_create(&proc->video_thread, NULL,
proc_video_thread, proc))) {
rc = err_capture_num(proc, SEV_ERROR, ZEBRA_ERR_SYSTEM,
__func__, "spawning video thread", rc);
goto done;
}
proc->video_started = 1;
zprintf(4, "spawned video thread\n");
#endif
}
}
#ifdef HAVE_LIBPTHREAD
if(proc->threaded && (proc->window ||
(proc->video && !proc->video_started))) {
/* spawn input monitor thread */
if((rc = pthread_create(&proc->input_thread, NULL,
proc_input_thread, proc))) {
rc = err_capture_num(proc, SEV_ERROR, ZEBRA_ERR_SYSTEM, __func__,
"spawning input thread", rc);
goto done;
}
proc->input_started = 1;
zprintf(4, "spawned input thread\n");
}
#endif
if(proc->window) {
/* arbitrary default */
int width = 640, height = 480;
if(proc->video) {
width = zebra_video_get_width(proc->video);
height = zebra_video_get_height(proc->video);
}
if(_zebra_window_open(proc, "zebra barcode reader", width, height)) {
rc = -1;
goto done;
}
else if(zebra_window_attach(proc->window, proc->display, proc->xwin)) {
rc = err_copy(proc, proc->window);
goto done;
}
}
if(proc->video && proc->force_input) {
if(zebra_video_init(proc->video, proc->force_input))
rc = err_copy(proc, proc->video);
}
else if(proc->video)
while(zebra_negotiate_format(proc->video, proc->window)) {
if(proc->video && proc->window) {
fprintf(stderr,
"WARNING: no compatible input to output format\n"
"...trying again with output disabled\n");
zebra_window_destroy(proc->window);
proc->window = NULL;
}
else {
zprintf(1, "ERROR: no compatible %s format\n",
(proc->video) ? "video input" : "window output");
rc = err_capture(proc, SEV_ERROR, ZEBRA_ERR_UNSUPPORTED,
__func__, "no compatible image format");
goto done;
}
}
done:
proc_unlock(proc);
return(rc);
}
/* API lock is already held */
int _zbar_process_image (zbar_processor_t *proc,
zbar_image_t *img)
{
uint32_t force_fmt = proc->force_output;
if(img) {
if(proc->dumping) {
zbar_image_write(proc->window->image, "zbar");
proc->dumping = 0;
}
uint32_t format = zbar_image_get_format(img);
zprintf(16, "processing: %.4s(%08" PRIx32 ") %dx%d @%p\n",
(char*)&format, format,
zbar_image_get_width(img), zbar_image_get_height(img),
zbar_image_get_data(img));
/* FIXME locking all other interfaces while processing is conservative
* but easier for now and we don't expect this to take long...
*/
zbar_image_t *tmp = zbar_image_convert(img, fourcc('Y','8','0','0'));
if(!tmp)
goto error;
if(proc->syms) {
zbar_symbol_set_ref(proc->syms, -1);
proc->syms = NULL;
}
zbar_image_scanner_recycle_image(proc->scanner, img);
int nsyms = zbar_scan_image(proc->scanner, tmp);
_zbar_image_swap_symbols(img, tmp);
zbar_image_destroy(tmp);
tmp = NULL;
if(nsyms < 0)
goto error;
proc->syms = zbar_image_scanner_get_results(proc->scanner);
if(proc->syms)
zbar_symbol_set_ref(proc->syms, 1);
if(_zbar_verbosity >= 8) {
const zbar_symbol_t *sym = zbar_image_first_symbol(img);
while(sym) {
zbar_symbol_type_t type = zbar_symbol_get_type(sym);
int count = zbar_symbol_get_count(sym);
zprintf(8, "%s: %s (%d pts) (dir=%d) (q=%d) (%s)\n",
zbar_get_symbol_name(type),
zbar_symbol_get_data(sym),
zbar_symbol_get_loc_size(sym),
zbar_symbol_get_orientation(sym),
zbar_symbol_get_quality(sym),
(count < 0) ? "uncertain" :
(count > 0) ? "duplicate" : "new");
sym = zbar_symbol_next(sym);
}
}
if(nsyms) {
/* FIXME only call after filtering */
_zbar_mutex_lock(&proc->mutex);
_zbar_processor_notify(proc, EVENT_OUTPUT);
_zbar_mutex_unlock(&proc->mutex);
if(proc->handler)
proc->handler(img, proc->userdata);
}
if(force_fmt) {
zbar_symbol_set_t *syms = img->syms;
img = zbar_image_convert(img, force_fmt);
if(!img)
goto error;
img->syms = syms;
zbar_symbol_set_ref(syms, 1);
}
}
/* display to window if enabled */
int rc = 0;
if(proc->window) {
if((rc = zbar_window_draw(proc->window, img)))
err_copy(proc, proc->window);
_zbar_processor_invalidate(proc);
}
if(force_fmt && img)
zbar_image_destroy(img);
return(rc);
error:
return(err_capture(proc, SEV_ERROR, ZBAR_ERR_UNSUPPORTED,
__func__, "unknown image format"));
}
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);
}
