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authorRoy Ben Shabat <Roy.mail.net@gmail.com>2019-04-08 00:44:51 +0300
committerRoy Ben Shabat <Roy.mail.net@gmail.com>2019-04-08 00:44:51 +0300
commit08dd6000fe3a218221003876a699f448835b62e4 (patch)
tree6ef67384b80cd8176a4a2de8d09fae103a092357 /Software/External_Repositories/ZBar/include/zbar/Video.h
parent3254beb8358745efc6988df3d52a24fcb858fcdd (diff)
downloadTango-08dd6000fe3a218221003876a699f448835b62e4.tar.gz
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+//------------------------------------------------------------------------
+// Copyright 2007-2009 (c) Jeff Brown <spadix@users.sourceforge.net>
+//
+// This file is part of the ZBar Bar Code Reader.
+//
+// The ZBar Bar Code Reader is free software; you can redistribute it
+// and/or modify it under the terms of the GNU Lesser Public License as
+// published by the Free Software Foundation; either version 2.1 of
+// the License, or (at your option) any later version.
+//
+// The ZBar Bar Code Reader is distributed in the hope that it will be
+// useful, but WITHOUT ANY WARRANTY; without even the implied warranty
+// of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Lesser Public License for more details.
+//
+// You should have received a copy of the GNU Lesser Public License
+// along with the ZBar Bar Code Reader; if not, write to the Free
+// Software Foundation, Inc., 51 Franklin St, Fifth Floor,
+// Boston, MA 02110-1301 USA
+//
+// http://sourceforge.net/projects/zbar
+//------------------------------------------------------------------------
+#ifndef _ZBAR_VIDEO_H_
+#define _ZBAR_VIDEO_H_
+
+/// @file
+/// Video Input C++ wrapper
+
+#ifndef _ZBAR_H_
+# error "include zbar.h in your application, **not** zbar/Video.h"
+#endif
+
+#include "Image.h"
+
+namespace zbar {
+
+/// mid-level video source abstraction.
+/// captures images from a video device
+
+class Video {
+public:
+ /// constructor.
+ Video (zbar_video_t *video = NULL)
+ {
+ if(video)
+ _video = video;
+ else
+ _video = zbar_video_create();
+ }
+
+ /// constructor.
+ Video (std::string& device)
+ {
+ _video = zbar_video_create();
+ open(device);
+ }
+
+ ~Video ()
+ {
+ zbar_video_destroy(_video);
+ }
+
+ /// cast to C video object.
+ operator zbar_video_t* () const
+ {
+ return(_video);
+ }
+
+ /// open and probe a video device.
+ void open (std::string& device)
+ {
+ if(zbar_video_open(_video, device.c_str()))
+ throw_exception(_video);
+ }
+
+ /// close video device if open.
+ void close ()
+ {
+ if(zbar_video_open(_video, NULL))
+ throw_exception(_video);
+ }
+
+ /// initialize video using a specific format for debug.
+ /// see zbar_video_init()
+ void init (unsigned long fourcc)
+ {
+ if(zbar_video_init(_video, fourcc))
+ throw_exception(_video);
+ }
+
+ /// initialize video using a specific format for debug.
+ /// see zbar_video_init()
+ void init (std::string& format)
+ {
+ unsigned int fourcc = *(unsigned int*)format.c_str();
+ if(zbar_video_init(_video, fourcc))
+ throw_exception(_video);
+ }
+
+ /// retrieve file descriptor associated with open *nix video device.
+ /// see zbar_video_get_fd()
+ int get_fd ()
+ {
+ return(zbar_video_get_fd(_video));
+ }
+
+ /// retrieve current output image width.
+ /// see zbar_video_get_width()
+ int get_width ()
+ {
+ return(zbar_video_get_width(_video));
+ }
+
+ /// retrieve current output image height.
+ /// see zbar_video_get_height()
+ int get_height ()
+ {
+ return(zbar_video_get_height(_video));
+ }
+
+ /// start/stop video capture.
+ /// see zbar_video_enable()
+ void enable (bool enable = true)
+ {
+ if(zbar_video_enable(_video, enable))
+ throw_exception(_video);
+ }
+
+ /// retrieve next captured image.
+ /// see zbar_video_next_image()
+ Image next_image ()
+ {
+ zbar_image_t *img = zbar_video_next_image(_video);
+ if(!img)
+ throw_exception(_video);
+ return(Image(img));
+ }
+
+ /// request a preferred size for the video image from the device.
+ /// see zbar_video_request_size()
+ /// @since 0.6
+ void request_size (int width, int height)
+ {
+ zbar_video_request_size(_video, width, height);
+ }
+
+ /// request a preferred driver interface version for debug/testing.
+ /// see zbar_video_request_interface()
+ /// @since 0.6
+ void request_interface (int version)
+ {
+ zbar_video_request_interface(_video, version);
+ }
+
+ /// request a preferred I/O mode for debug/testing.
+ /// see zbar_video_request_iomode()
+ /// @since 0.7
+ void request_iomode (int iomode)
+ {
+ if(zbar_video_request_iomode(_video, iomode))
+ throw_exception(_video);
+ }
+
+private:
+ zbar_video_t *_video;
+};
+
+}
+
+#endif