714 lines
20 KiB
C
714 lines
20 KiB
C
/*------------------------------------------------------------------------
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* Copyright 2007-2010 (c) Jeff Brown <spadix@users.sourceforge.net>
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*
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* This file is part of the ZBar Bar Code Reader.
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*
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* The ZBar Bar Code Reader is free software; you can redistribute it
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* and/or modify it under the terms of the GNU Lesser Public License as
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* published by the Free Software Foundation; either version 2.1 of
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* the License, or (at your option) any later version.
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*
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* The ZBar Bar Code Reader is distributed in the hope that it will be
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* useful, but WITHOUT ANY WARRANTY; without even the implied warranty
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* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser Public License for more details.
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*
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* You should have received a copy of the GNU Lesser Public License
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* along with the ZBar Bar Code Reader; if not, write to the Free
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* Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301 USA
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*
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* http://sourceforge.net/projects/zbar
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*------------------------------------------------------------------------*/
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#include "processor.h"
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#include "window.h"
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#include "image.h"
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static inline int proc_enter (zbar_processor_t *proc)
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{
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_zbar_mutex_lock(&proc->mutex);
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return(_zbar_processor_lock(proc));
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}
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static inline int proc_leave (zbar_processor_t *proc)
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{
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int rc = _zbar_processor_unlock(proc, 0);
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_zbar_mutex_unlock(&proc->mutex);
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return(rc);
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}
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static inline int proc_open (zbar_processor_t *proc)
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{
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/* arbitrary default */
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int width = 640, height = 480;
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if(proc->video) {
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width = zbar_video_get_width(proc->video);
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height = zbar_video_get_height(proc->video);
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}
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return(_zbar_processor_open(proc, "zbar barcode reader", width, height));
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}
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/* API lock is already held */
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int _zbar_process_image (zbar_processor_t *proc,
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zbar_image_t *img)
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{
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uint32_t force_fmt = proc->force_output;
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if(img) {
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if(proc->dumping) {
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zbar_image_write(proc->window->image, "zbar");
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proc->dumping = 0;
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}
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uint32_t format = zbar_image_get_format(img);
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zprintf(16, "processing: %.4s(%08" PRIx32 ") %dx%d @%p\n",
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(char*)&format, format,
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zbar_image_get_width(img), zbar_image_get_height(img),
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zbar_image_get_data(img));
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/* FIXME locking all other interfaces while processing is conservative
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* but easier for now and we don't expect this to take long...
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*/
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zbar_image_t *tmp = zbar_image_convert(img, fourcc('Y','8','0','0'));
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if(!tmp)
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goto error;
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if(proc->syms) {
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zbar_symbol_set_ref(proc->syms, -1);
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proc->syms = NULL;
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}
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zbar_image_scanner_recycle_image(proc->scanner, img);
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int nsyms = zbar_scan_image(proc->scanner, tmp);
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_zbar_image_swap_symbols(img, tmp);
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zbar_image_destroy(tmp);
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tmp = NULL;
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if(nsyms < 0)
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goto error;
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proc->syms = zbar_image_scanner_get_results(proc->scanner);
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if(proc->syms)
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zbar_symbol_set_ref(proc->syms, 1);
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if(_zbar_verbosity >= 8) {
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const zbar_symbol_t *sym = zbar_image_first_symbol(img);
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while(sym) {
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zbar_symbol_type_t type = zbar_symbol_get_type(sym);
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int count = zbar_symbol_get_count(sym);
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zprintf(8, "%s: %s (%d pts) (dir=%d) (q=%d) (%s)\n",
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zbar_get_symbol_name(type),
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zbar_symbol_get_data(sym),
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zbar_symbol_get_loc_size(sym),
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zbar_symbol_get_orientation(sym),
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zbar_symbol_get_quality(sym),
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(count < 0) ? "uncertain" :
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(count > 0) ? "duplicate" : "new");
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sym = zbar_symbol_next(sym);
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}
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}
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if(nsyms) {
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/* FIXME only call after filtering */
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_zbar_mutex_lock(&proc->mutex);
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_zbar_processor_notify(proc, EVENT_OUTPUT);
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_zbar_mutex_unlock(&proc->mutex);
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if(proc->handler)
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proc->handler(img, proc->userdata);
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}
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if(force_fmt) {
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zbar_symbol_set_t *syms = img->syms;
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img = zbar_image_convert(img, force_fmt);
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if(!img)
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goto error;
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img->syms = syms;
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zbar_symbol_set_ref(syms, 1);
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}
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}
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/* display to window if enabled */
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int rc = 0;
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if(proc->window) {
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if((rc = zbar_window_draw(proc->window, img)))
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err_copy(proc, proc->window);
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_zbar_processor_invalidate(proc);
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}
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if(force_fmt && img)
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zbar_image_destroy(img);
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return(rc);
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error:
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return(err_capture(proc, SEV_ERROR, ZBAR_ERR_UNSUPPORTED,
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__func__, "unknown image format"));
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}
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int _zbar_processor_handle_input (zbar_processor_t *proc,
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int input)
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{
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int event = EVENT_INPUT;
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switch(input) {
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case -1:
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event |= EVENT_CANCELED;
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_zbar_processor_set_visible(proc, 0);
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err_capture(proc, SEV_WARNING, ZBAR_ERR_CLOSED, __func__,
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"user closed display window");
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break;
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case 'd':
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proc->dumping = 1;
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return(0);
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case '+':
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case '=':
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if(proc->window) {
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int ovl = zbar_window_get_overlay(proc->window);
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zbar_window_set_overlay(proc->window, ovl + 1);
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}
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break;
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case '-':
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if(proc->window) {
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int ovl = zbar_window_get_overlay(proc->window);
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zbar_window_set_overlay(proc->window, ovl - 1);
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}
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break;
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}
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_zbar_mutex_lock(&proc->mutex);
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proc->input = input;
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if(input == -1 && proc->visible && proc->streaming)
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/* also cancel outstanding output waiters */
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event |= EVENT_OUTPUT;
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_zbar_processor_notify(proc, event);
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_zbar_mutex_unlock(&proc->mutex);
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return(input);
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}
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#ifdef ZTHREAD
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static ZTHREAD proc_video_thread (void *arg)
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{
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zbar_processor_t *proc = arg;
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zbar_thread_t *thread = &proc->video_thread;
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_zbar_mutex_lock(&proc->mutex);
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_zbar_thread_init(thread);
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zprintf(4, "spawned video thread\n");
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while(thread->started) {
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/* wait for video stream to be active */
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while(thread->started && !proc->streaming)
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_zbar_event_wait(&thread->notify, &proc->mutex, NULL);
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if(!thread->started)
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break;
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/* blocking capture image from video */
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_zbar_mutex_unlock(&proc->mutex);
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zbar_image_t *img = zbar_video_next_image(proc->video);
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_zbar_mutex_lock(&proc->mutex);
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if(!img && !proc->streaming)
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continue;
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else if(!img)
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/* FIXME could abort streaming and keep running? */
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break;
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/* acquire API lock */
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_zbar_processor_lock(proc);
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_zbar_mutex_unlock(&proc->mutex);
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if(thread->started && proc->streaming)
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_zbar_process_image(proc, img);
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zbar_image_destroy(img);
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_zbar_mutex_lock(&proc->mutex);
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/* release API lock */
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_zbar_processor_unlock(proc, 0);
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}
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thread->running = 0;
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_zbar_event_trigger(&thread->activity);
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_zbar_mutex_unlock(&proc->mutex);
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return(0);
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}
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static ZTHREAD proc_input_thread (void *arg)
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{
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zbar_processor_t *proc = arg;
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zbar_thread_t *thread = &proc->input_thread;
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if(proc->window && proc_open(proc))
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goto done;
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_zbar_mutex_lock(&proc->mutex);
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thread->running = 1;
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_zbar_event_trigger(&thread->activity);
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zprintf(4, "spawned input thread\n");
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int rc = 0;
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while(thread->started && rc >= 0) {
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_zbar_mutex_unlock(&proc->mutex);
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rc = _zbar_processor_input_wait(proc, &thread->notify, -1);
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_zbar_mutex_lock(&proc->mutex);
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}
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_zbar_mutex_unlock(&proc->mutex);
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_zbar_processor_close(proc);
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_zbar_mutex_lock(&proc->mutex);
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done:
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thread->running = 0;
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_zbar_event_trigger(&thread->activity);
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_zbar_mutex_unlock(&proc->mutex);
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return(0);
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}
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#endif
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zbar_processor_t *zbar_processor_create (int threaded)
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{
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zbar_processor_t *proc = calloc(1, sizeof(zbar_processor_t));
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if(!proc)
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return(NULL);
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err_init(&proc->err, ZBAR_MOD_PROCESSOR);
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proc->scanner = zbar_image_scanner_create();
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if(!proc->scanner) {
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free(proc);
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return(NULL);
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}
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proc->threaded = !_zbar_mutex_init(&proc->mutex) && threaded;
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_zbar_processor_init(proc);
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return(proc);
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}
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void zbar_processor_destroy (zbar_processor_t *proc)
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{
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zbar_processor_init(proc, NULL, 0);
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if(proc->syms) {
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zbar_symbol_set_ref(proc->syms, -1);
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proc->syms = NULL;
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}
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if(proc->scanner) {
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zbar_image_scanner_destroy(proc->scanner);
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proc->scanner = NULL;
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}
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_zbar_mutex_destroy(&proc->mutex);
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_zbar_processor_cleanup(proc);
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assert(!proc->wait_head);
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assert(!proc->wait_tail);
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assert(!proc->wait_next);
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proc_waiter_t *w, *next;
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for(w = proc->free_waiter; w; w = next) {
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next = w->next;
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_zbar_event_destroy(&w->notify);
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free(w);
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}
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err_cleanup(&proc->err);
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free(proc);
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}
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int zbar_processor_init (zbar_processor_t *proc,
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const char *dev,
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int enable_display)
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{
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if(proc->video)
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zbar_processor_set_active(proc, 0);
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if(proc->window && !proc->input_thread.started)
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_zbar_processor_close(proc);
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_zbar_mutex_lock(&proc->mutex);
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_zbar_thread_stop(&proc->input_thread, &proc->mutex);
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_zbar_thread_stop(&proc->video_thread, &proc->mutex);
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_zbar_processor_lock(proc);
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_zbar_mutex_unlock(&proc->mutex);
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if(proc->window) {
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zbar_window_destroy(proc->window);
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proc->window = NULL;
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}
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int rc = 0;
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if(proc->video) {
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zbar_video_destroy(proc->video);
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proc->video = NULL;
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}
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if(!dev && !enable_display)
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/* nothing to do */
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goto done;
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if(enable_display) {
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proc->window = zbar_window_create();
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if(!proc->window) {
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rc = err_capture(proc, SEV_FATAL, ZBAR_ERR_NOMEM,
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__func__, "allocating window resources");
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goto done;
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}
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}
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if(dev) {
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proc->video = zbar_video_create();
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if(!proc->video) {
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rc = err_capture(proc, SEV_FATAL, ZBAR_ERR_NOMEM,
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__func__, "allocating video resources");
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goto done;
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}
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if(proc->req_width || proc->req_height)
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zbar_video_request_size(proc->video,
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proc->req_width, proc->req_height);
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if(proc->req_intf)
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zbar_video_request_interface(proc->video, proc->req_intf);
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if((proc->req_iomode &&
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zbar_video_request_iomode(proc->video, proc->req_iomode)) ||
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zbar_video_open(proc->video, dev)) {
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rc = err_copy(proc, proc->video);
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goto done;
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}
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}
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/* spawn blocking video thread */
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int video_threaded = (proc->threaded && proc->video &&
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zbar_video_get_fd(proc->video) < 0);
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if(video_threaded &&
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_zbar_thread_start(&proc->video_thread, proc_video_thread, proc,
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&proc->mutex)) {
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rc = err_capture(proc, SEV_ERROR, ZBAR_ERR_SYSTEM, __func__,
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"spawning video thread");
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goto done;
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}
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/* spawn input monitor thread */
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int input_threaded = (proc->threaded &&
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(proc->window ||
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(proc->video && !video_threaded)));
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if(input_threaded &&
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_zbar_thread_start(&proc->input_thread, proc_input_thread, proc,
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&proc->mutex)) {
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rc = err_capture(proc, SEV_ERROR, ZBAR_ERR_SYSTEM, __func__,
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"spawning input thread");
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goto done;
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}
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if(proc->window && !input_threaded &&
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(rc = proc_open(proc)))
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goto done;
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if(proc->video && proc->force_input) {
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if(zbar_video_init(proc->video, proc->force_input))
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rc = err_copy(proc, proc->video);
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}
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else if(proc->video) {
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int retry = -1;
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if(proc->window) {
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retry = zbar_negotiate_format(proc->video, proc->window);
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if(retry)
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fprintf(stderr,
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"WARNING: no compatible input to output format\n"
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"...trying again with output disabled\n");
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}
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if(retry)
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retry = zbar_negotiate_format(proc->video, NULL);
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if(retry) {
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zprintf(1, "ERROR: no compatible %s format\n",
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(proc->video) ? "video input" : "window output");
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rc = err_capture(proc, SEV_ERROR, ZBAR_ERR_UNSUPPORTED,
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__func__, "no compatible image format");
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}
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}
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done:
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_zbar_mutex_lock(&proc->mutex);
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proc_leave(proc);
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return(rc);
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}
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zbar_image_data_handler_t*
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zbar_processor_set_data_handler (zbar_processor_t *proc,
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zbar_image_data_handler_t *handler,
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const void *userdata)
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{
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zbar_image_data_handler_t *result = NULL;
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proc_enter(proc);
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result = proc->handler;
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proc->handler = handler;
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proc->userdata = userdata;
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proc_leave(proc);
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return(result);
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}
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void zbar_processor_set_userdata (zbar_processor_t *proc,
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void *userdata)
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{
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_zbar_mutex_lock(&proc->mutex);
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proc->userdata = userdata;
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_zbar_mutex_unlock(&proc->mutex);
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}
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void *zbar_processor_get_userdata (const zbar_processor_t *proc)
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{
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zbar_processor_t *ncproc = (zbar_processor_t*)proc;
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_zbar_mutex_lock(&ncproc->mutex);
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void *userdata = (void*)ncproc->userdata;
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_zbar_mutex_unlock(&ncproc->mutex);
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return(userdata);
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}
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int zbar_processor_set_config (zbar_processor_t *proc,
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zbar_symbol_type_t sym,
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zbar_config_t cfg,
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int val)
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{
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proc_enter(proc);
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int rc = zbar_image_scanner_set_config(proc->scanner, sym, cfg, val);
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proc_leave(proc);
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return(rc);
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}
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int zbar_processor_set_control (zbar_processor_t *proc,
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const char *control_name,
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int value)
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{
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proc_enter(proc);
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int value_before, value_after;
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if(_zbar_verbosity >= 4)
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if(zbar_video_get_control(proc->video, control_name, &value_before)==0)
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zprintf(0, "value of %s before a set: %d\n", control_name, value_before);
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int rc = zbar_video_set_control(proc->video, control_name, value);
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if(_zbar_verbosity >= 4)
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if(zbar_video_get_control(proc->video, control_name, &value_after)==0)
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zprintf(0, "value of %s after a set: %d\n", control_name, value_after);
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proc_leave(proc);
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return(rc);
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}
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int zbar_processor_get_control (zbar_processor_t *proc,
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const char *control_name,
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int *value)
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{
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proc_enter(proc);
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int rc = zbar_video_get_control(proc->video, control_name, value);
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proc_leave(proc);
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return(rc);
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}
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int zbar_processor_request_size (zbar_processor_t *proc,
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unsigned width,
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unsigned height)
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{
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proc_enter(proc);
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proc->req_width = width;
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proc->req_height = height;
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proc_leave(proc);
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return(0);
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}
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int zbar_processor_request_interface (zbar_processor_t *proc,
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int ver)
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{
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proc_enter(proc);
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proc->req_intf = ver;
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proc_leave(proc);
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return(0);
|
|
}
|
|
|
|
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_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);
|
|
}
|
|
|
|
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_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);
|
|
}
|
|
|
|
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_user_wait (zbar_processor_t *proc,
|
|
int timeout)
|
|
{
|
|
proc_enter(proc);
|
|
_zbar_mutex_unlock(&proc->mutex);
|
|
|
|
int 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_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_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_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);
|
|
}
|