--- /dev/null
+/* GStreamer
+ * Copyright (C) 2009 Stefan Kost <ensonic@users.sf.net>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+/*
+ * This file was (probably) generated from
+ * gstvideotemplate.c,v 1.12 2004/01/07 21:07:12 ds Exp
+ * and
+ * make_filter,v 1.6 2004/01/07 21:33:01 ds Exp
+ */
+
+/**
+ * SECTION:element-zbar
+ *
+ * Detect bar codes in the video streams and send them as app messages.
+ *
+ * <refsect2>
+ * <title>Example launch lines</title>
+ * |[
+ * gst-launch -m v4l2src ! ffmpegcolorspace ! zbar ! ffmpegcolorspace ! xvimagesink
+ * ]| This pipeline will detect barcodes and send them as messages.
+ * |[
+ * gst-launch -m v4l2src ! tee name=t ! queue ! ffmpegcolorspace ! zbar ! fakesink t. ! queue ! xvimagesink
+ * ]| Same as above, but running the filter on a branch to keep the display in color
+ * </refsect2>
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "gstzbar.h"
+
+#include <string.h>
+#include <math.h>
+
+#include <gst/video/video.h>
+
+
+GST_DEBUG_CATEGORY_STATIC (zbar_debug);
+#define GST_CAT_DEFAULT zbar_debug
+
+/* GstZBar signals and args */
+enum
+{
+ /* FILL ME */
+ LAST_SIGNAL
+};
+
+enum
+{
+ PROP_0,
+ /* FILL ME */
+};
+
+#define DEFAULT_PROP_ZBAR 1
+
+static const GstElementDetails zbar_details =
+GST_ELEMENT_DETAILS ("Barcode detector",
+ "Filter/Analyzer/Video",
+ "Detect bar codes in the video streams",
+ "Stefan Kost <ensonic@users.sf.net>");
+
+static GstStaticPadTemplate gst_zbar_src_template =
+GST_STATIC_PAD_TEMPLATE ("src",
+ GST_PAD_SRC,
+ GST_PAD_ALWAYS,
+ GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("{ Y800 }"))
+ );
+
+static GstStaticPadTemplate gst_zbar_sink_template =
+GST_STATIC_PAD_TEMPLATE ("sink",
+ GST_PAD_SINK,
+ GST_PAD_ALWAYS,
+ GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("{ Y800 }"))
+ );
+
+static void gst_zbar_finalize (GObject * object);
+static void gst_zbar_set_property (GObject * object, guint prop_id,
+ const GValue * value, GParamSpec * pspec);
+static void gst_zbar_get_property (GObject * object, guint prop_id,
+ GValue * value, GParamSpec * pspec);
+
+static gboolean gst_zbar_set_caps (GstBaseTransform * base, GstCaps * incaps,
+ GstCaps * outcaps);
+static GstFlowReturn gst_zbar_transform_ip (GstBaseTransform * transform,
+ GstBuffer * buf);
+
+GST_BOILERPLATE (GstZBar, gst_zbar, GstVideoFilter, GST_TYPE_VIDEO_FILTER);
+
+
+static void
+gst_zbar_base_init (gpointer g_class)
+{
+ GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
+
+ gst_element_class_set_details (element_class, &zbar_details);
+
+ gst_element_class_add_pad_template (element_class,
+ gst_static_pad_template_get (&gst_zbar_sink_template));
+ gst_element_class_add_pad_template (element_class,
+ gst_static_pad_template_get (&gst_zbar_src_template));
+}
+
+static void
+gst_zbar_class_init (GstZBarClass * g_class)
+{
+ GObjectClass *gobject_class;
+ GstBaseTransformClass *trans_class;
+
+ gobject_class = G_OBJECT_CLASS (g_class);
+ trans_class = GST_BASE_TRANSFORM_CLASS (g_class);
+
+ gobject_class->set_property = gst_zbar_set_property;
+ gobject_class->get_property = gst_zbar_get_property;
+ gobject_class->finalize = gst_zbar_finalize;
+
+ trans_class->set_caps = GST_DEBUG_FUNCPTR (gst_zbar_set_caps);
+ trans_class->transform_ip = GST_DEBUG_FUNCPTR (gst_zbar_transform_ip);
+}
+
+static void
+gst_zbar_init (GstZBar * zbar, GstZBarClass * g_class)
+{
+ zbar->scanner = zbar_image_scanner_create ();
+ /* FIXME: do this in start/stop vmethods */
+ zbar_image_scanner_enable_cache (zbar->scanner, TRUE);
+}
+
+static void
+gst_zbar_finalize (GObject * object)
+{
+ GstZBar *zbar = GST_ZBAR (object);
+
+ zbar_image_scanner_destroy (zbar->scanner);
+
+ G_OBJECT_CLASS (parent_class)->finalize (object);
+}
+
+static void
+gst_zbar_set_property (GObject * object, guint prop_id, const GValue * value,
+ GParamSpec * pspec)
+{
+ GstZBar *zbar;
+
+ g_return_if_fail (GST_IS_ZBAR (object));
+ zbar = GST_ZBAR (object);
+
+ switch (prop_id) {
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+static void
+gst_zbar_get_property (GObject * object, guint prop_id, GValue * value,
+ GParamSpec * pspec)
+{
+ GstZBar *zbar;
+
+ g_return_if_fail (GST_IS_ZBAR (object));
+ zbar = GST_ZBAR (object);
+
+ switch (prop_id) {
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+static gboolean
+gst_zbar_set_caps (GstBaseTransform * base, GstCaps * incaps, GstCaps * outcaps)
+{
+ GstZBar *this;
+ GstStructure *structure;
+ gboolean res;
+
+ this = GST_ZBAR (base);
+
+ GST_DEBUG_OBJECT (this,
+ "set_caps: in %" GST_PTR_FORMAT " out %" GST_PTR_FORMAT, incaps, outcaps);
+
+ structure = gst_caps_get_structure (incaps, 0);
+
+ res = gst_structure_get_int (structure, "width", &this->width);
+ res &= gst_structure_get_int (structure, "height", &this->height);
+ if (!res)
+ goto done;
+
+done:
+ return res;
+}
+
+static GstFlowReturn
+gst_zbar_transform_ip (GstBaseTransform * base, GstBuffer * outbuf)
+{
+ GstZBar *zbar;
+ guint8 *data;
+ guint size;
+ zbar_image_t *image;
+ const zbar_symbol_t *symbol;
+ int n;
+
+ zbar = GST_ZBAR (base);
+
+ if (base->passthrough)
+ goto done;
+
+ data = GST_BUFFER_DATA (outbuf);
+ size = GST_BUFFER_SIZE (outbuf);
+
+ image = zbar_image_create ();
+ zbar_image_set_format (image, *(gint *) "Y800");
+ zbar_image_set_size (image, zbar->width, zbar->height);
+ zbar_image_set_data (image, (gpointer) data, zbar->width * zbar->height,
+ NULL);
+
+
+ /* scan the image for barcodes */
+ n = zbar_scan_image (zbar->scanner, image);
+
+ /* extract results */
+ symbol = zbar_image_first_symbol (image);
+ for (; symbol; symbol = zbar_symbol_next (symbol)) {
+ /* do something useful with results */
+ zbar_symbol_type_t typ = zbar_symbol_get_type (symbol);
+ const char *data = zbar_symbol_get_data (symbol);
+ printf ("decoded %s symbol \"%s\"\n", zbar_get_symbol_name (typ), data);
+ }
+
+ /* clean up */
+ zbar_image_destroy (image);
+
+
+done:
+ return GST_FLOW_OK;
+
+/* ERRORS */
+}
+
+static gboolean
+plugin_init (GstPlugin * plugin)
+{
+ GST_DEBUG_CATEGORY_INIT (zbar_debug, "zbar", 0, "zbar");
+
+ return gst_element_register (plugin, "zbar", GST_RANK_NONE, GST_TYPE_ZBAR);
+}
+
+GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
+ GST_VERSION_MINOR,
+ "zbar",
+ "zbar barcode scanner",
+ plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN);
--- /dev/null
+/* GStreamer
+ * Copyright (C) 2009 Stefan Kost <ensonic@users.sf.net>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+
+#ifndef __GST_VIDEO_ZBAR_H__
+#define __GST_VIDEO_ZBAR_H__
+
+#include <gst/video/gstvideofilter.h>
+#include <zbar.h>
+
+G_BEGIN_DECLS
+
+#define GST_TYPE_ZBAR \
+ (gst_zbar_get_type())
+#define GST_ZBAR(obj) \
+ (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_ZBAR,GstZBar))
+#define GST_ZBAR_CLASS(klass) \
+ (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_ZBAR,GstZBarClass))
+#define GST_IS_ZBAR(obj) \
+ (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_ZBAR))
+#define GST_IS_ZBAR_CLASS(klass) \
+ (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_ZBAR))
+
+typedef struct _GstZBar GstZBar;
+typedef struct _GstZBarClass GstZBarClass;
+
+/**
+ * GstZBar:
+ *
+ * Opaque data structure.
+ */
+struct _GstZBar
+{
+ GstVideoFilter videofilter;
+
+ /* format */
+ gint width;
+ gint height;
+
+ /* properties */
+
+ /* internals */
+ zbar_image_scanner_t *scanner;
+};
+
+struct _GstZBarClass
+{
+ GstVideoFilterClass parent_class;
+};
+
+GType gst_zbar_get_type(void);
+
+G_END_DECLS
+
+#endif /* __GST_VIDEO_ZBAR_H__ */
projects / platform / upstream / gstreamer.git / commitdiff