int zbar_processor_user_wait (zbar_processor_t *proc,
int timeout)
{
int rc;
proc_enter(proc);
_zbar_mutex_unlock(&proc->mutex);
rc = -1;
if(proc->visible || proc->streaming || timeout >= 0) {
zbar_timer_t timer;
rc = _zbar_processor_wait(proc, EVENT_INPUT,
_zbar_timer_init(&timer, timeout));
}
if(!proc->visible)
rc = err_capture(proc, SEV_WARNING, ZBAR_ERR_CLOSED, __func__,
"display window not available for input");
if(rc > 0)
rc = proc->input;
_zbar_mutex_lock(&proc->mutex);
proc_leave(proc);
return(rc);
}
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);
}
int zbar_processor_set_visible (zbar_processor_t *proc,
int visible)
{
proc_enter(proc);
_zbar_mutex_unlock(&proc->mutex);
int rc = 0;
if(proc->window) {
if(proc->video)
rc = _zbar_processor_set_size(proc,
zbar_video_get_width(proc->video),
zbar_video_get_height(proc->video));
if(!rc)
rc = _zbar_processor_set_visible(proc, visible);
if(!rc)
proc->visible = (visible != 0);
}
else if(visible)
rc = err_capture(proc, SEV_ERROR, ZBAR_ERR_INVALID, __func__,
"processor display window not initialized");
_zbar_mutex_lock(&proc->mutex);
proc_leave(proc);
return(rc);
}
int zbar_processor_is_visible (zbar_processor_t *proc)
{
proc_enter(proc);
int visible = proc->window && proc->visible;
proc_leave(proc);
return(visible);
}
int zbar_processor_init (zbar_processor_t *proc,
const char *dev,
int enable_display)
{
int rc, input_threaded;
_zbar_mutex_lock(&proc->mutex);
_zbar_thread_stop(&proc->input_thread, &proc->mutex);
_zbar_processor_lock(proc);
_zbar_mutex_unlock(&proc->mutex);
rc = 0;
if(!dev && !enable_display)
/* nothing to do */
goto done;
/* spawn input monitor thread */
input_threaded = proc->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;
}
done:
_zbar_mutex_lock(&proc->mutex);
proc_leave(proc);
return(rc);
}
int zbar_processor_request_iomode (zbar_processor_t *proc,
int iomode)
{
proc_enter(proc);
proc->req_iomode = iomode;
proc_leave(proc);
return(0);
}
int zbar_processor_request_interface (zbar_processor_t *proc,
int ver)
{
proc_enter(proc);
proc->req_intf = ver;
proc_leave(proc);
return(0);
}
int zbar_processor_request_size (zbar_processor_t *proc,
unsigned width,
unsigned height)
{
proc_enter(proc);
proc->req_width = width;
proc->req_height = height;
proc_leave(proc);
return(0);
}
int zbar_processor_set_config (zbar_processor_t *proc,
zbar_symbol_type_t sym,
zbar_config_t cfg,
int val)
{
proc_enter(proc);
int rc = zbar_image_scanner_set_config(proc->scanner, sym, cfg, val);
proc_leave(proc);
return(rc);
}
int zbar_processor_force_format (zbar_processor_t *proc,
unsigned long input,
unsigned long output)
{
proc_enter(proc);
proc->force_input = input;
proc->force_output = output;
proc_leave(proc);
return(0);
}
const zbar_symbol_set_t*
zbar_processor_get_results (const zbar_processor_t *proc)
{
zbar_processor_t *ncproc = (zbar_processor_t*)proc;
proc_enter(ncproc);
const zbar_symbol_set_t *syms = proc->syms;
if(syms)
zbar_symbol_set_ref(syms, 1);
proc_leave(ncproc);
return(syms);
}
int zbar_processor_set_visible (zbar_processor_t *proc,
int visible)
{
int rc = 0;
proc_enter(proc);
_zbar_mutex_unlock(&proc->mutex);
rc = err_capture(proc, SEV_ERROR, ZBAR_ERR_INVALID, __func__,
"processor display window not initialized");
_zbar_mutex_lock(&proc->mutex);
proc_leave(proc);
return(rc);
}
zbar_image_data_handler_t*
zbar_processor_set_data_handler (zbar_processor_t *proc,
zbar_image_data_handler_t *handler,
const void *userdata)
{
zbar_image_data_handler_t *result = NULL;
proc_enter(proc);
result = proc->handler;
proc->handler = handler;
proc->userdata = userdata;
proc_leave(proc);
return(result);
}
int zbar_process_image (zbar_processor_t *proc,
zbar_image_t *img)
{
int rc;
proc_enter(proc);
_zbar_mutex_unlock(&proc->mutex);
rc = 0;
if(!rc) {
zbar_image_scanner_enable_cache(proc->scanner, 0);
rc = _zbar_process_image(proc, img);
if(proc->streaming)
zbar_image_scanner_enable_cache(proc->scanner, 1);
}
_zbar_mutex_lock(&proc->mutex);
proc_leave(proc);
return(rc);
}
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);
}
int zbar_process_image (zbar_processor_t *proc,
zbar_image_t *img)
{
proc_enter(proc);
_zbar_mutex_unlock(&proc->mutex);
int rc = 0;
if(img && proc->window)
rc = _zbar_processor_set_size(proc,
zbar_image_get_width(img),
zbar_image_get_height(img));
if(!rc) {
zbar_image_scanner_enable_cache(proc->scanner, 0);
rc = _zbar_process_image(proc, img);
if(proc->streaming)
zbar_image_scanner_enable_cache(proc->scanner, 1);
}
_zbar_mutex_lock(&proc->mutex);
proc_leave(proc);
return(rc);
}
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);
}
