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);
}
static ZTHREAD proc_video_thread (void *arg)
{
zbar_processor_t *proc = arg;
zbar_thread_t *thread = &proc->video_thread;
_zbar_mutex_lock(&proc->mutex);
_zbar_thread_init(thread);
zprintf(4, "spawned video thread\n");
while(thread->started) {
/* wait for video stream to be active */
while(thread->started && !proc->streaming)
_zbar_event_wait(&thread->notify, &proc->mutex, NULL);
if(!thread->started)
break;
/* blocking capture image from video */
_zbar_mutex_unlock(&proc->mutex);
zbar_image_t *img = zbar_video_next_image(proc->video);
_zbar_mutex_lock(&proc->mutex);
if(!img && !proc->streaming)
continue;
else if(!img)
/* FIXME could abort streaming and keep running? */
break;
/* acquire API lock */
_zbar_processor_lock(proc);
_zbar_mutex_unlock(&proc->mutex);
if(thread->started && proc->streaming)
_zbar_process_image(proc, img);
zbar_image_destroy(img);
_zbar_mutex_lock(&proc->mutex);
/* release API lock */
_zbar_processor_unlock(proc, 0);
}
thread->running = 0;
_zbar_event_trigger(&thread->activity);
_zbar_mutex_unlock(&proc->mutex);
return(0);
}
static __inline int proc_enter (zbar_processor_t *proc)
{
_zbar_mutex_lock(&proc->mutex);
return(_zbar_processor_lock(proc));
}
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);
}
