--- /dev/null
+/*
+ * GStreamer
+ * Copyright (C) 2005 Thomas Vander Stichele <thomas@apestaart.org>
+ * Copyright (C) 2005 Ronald S. Bultje <rbultje@ronald.bitfreak.net>
+ * Copyright (C) 2010 Sreerenj Balachandran <bsreerenj@gmail.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ *
+ * Alternatively, the contents of this file may be used under the
+ * GNU Lesser General Public License Version 2.1 (the "LGPL"), in
+ * which case the following provisions apply instead of the ones
+ * mentioned above:
+ *
+ * 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.
+ */
+
+/**
+ * SECTION:element-textwrite
+ *
+ * FIXME:Describe textwrite here.
+ *
+ * <refsect2>
+ * <title>Example launch line</title>
+ * |[
+ * gst-launch -v -m fakesrc ! textwrite ! fakesink silent=TRUE
+ * ]|
+ * </refsect2>
+ */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <gst/gst.h>
+
+#include "gsttextwrite.h"
+
+GST_DEBUG_CATEGORY_STATIC (gst_textwrite_debug);
+#define GST_CAT_DEFAULT gst_textwrite_debug
+#define DEFAULT_PROP_TEXT ""
+#define DEFAULT_PROP_WIDTH 1
+#define DEFAULT_PROP_HEIGHT 1
+
+/* Filter signals and args */
+enum
+{
+ /* FILL ME */
+ LAST_SIGNAL
+};
+#define DEFAULT_WIDTH 1.0
+#define DEFAULT_HEIGHT 1.0
+enum
+{
+ PROP_0,
+ PROP_TEXT,
+ PROP_HEIGHT,
+ PROP_WIDTH
+};
+
+/* the capabilities of the inputs and outputs.
+ *
+ * describe the real formats here.
+ */
+static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink",
+ GST_PAD_SINK,
+ GST_PAD_ALWAYS,
+ GST_STATIC_CAPS ("video/x-raw-rgb")
+ );
+
+static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
+ GST_PAD_SRC,
+ GST_PAD_ALWAYS,
+ GST_STATIC_CAPS ("ANY")
+ );
+
+GST_BOILERPLATE (Gsttextwrite, gst_textwrite, GstElement,GST_TYPE_ELEMENT);
+
+static void gst_textwrite_set_property (GObject * object, guint prop_id,
+ const GValue * value, GParamSpec * pspec);
+static void gst_textwrite_get_property (GObject * object, guint prop_id,
+ GValue * value, GParamSpec * pspec);
+
+static gboolean gst_textwrite_set_caps (GstPad * pad, GstCaps * caps);
+static GstFlowReturn gst_textwrite_chain (GstPad * pad, GstBuffer * buf);
+
+
+
+/* Clean up */
+static void
+gst_textwrite_finalize (GObject * obj)
+{
+ Gsttextwrite *filter = GST_textwrite (obj);
+
+ if (filter->cvImage) {
+ cvReleaseImage (&filter->cvImage);
+ }
+
+ G_OBJECT_CLASS (parent_class)->finalize (obj);
+}
+
+
+
+/* GObject vmethod implementations */
+
+static void
+gst_textwrite_base_init (gpointer gclass)
+{
+ GstElementClass *element_class = GST_ELEMENT_CLASS (gclass);
+
+ gst_element_class_set_details_simple(element_class,
+ "textwrite",
+ "Filter/Effect/Video",
+ "Performs text writing to the video",
+ "sreerenj<bsreerenj@gmail.com>");
+
+ gst_element_class_add_pad_template (element_class,
+ gst_static_pad_template_get (&src_factory));
+ gst_element_class_add_pad_template (element_class,
+ gst_static_pad_template_get (&sink_factory));
+}
+
+/* initialize the textwrite's class */
+static void
+gst_textwrite_class_init (GsttextwriteClass * klass)
+{
+ GObjectClass *gobject_class;
+ GstElementClass *gstelement_class;
+
+ gobject_class = (GObjectClass *) klass;
+ gstelement_class = (GstElementClass *) klass;
+
+ parent_class = g_type_class_peek_parent (klass);
+ gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_textwrite_finalize);
+
+ gobject_class->set_property = gst_textwrite_set_property;
+ gobject_class->get_property = gst_textwrite_get_property;
+
+
+ g_object_class_install_property (gobject_class, PROP_TEXT,
+ g_param_spec_string ("text", "text",
+ "Text to be display.", DEFAULT_PROP_TEXT,
+ G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
+
+ g_object_class_install_property (gobject_class, PROP_HEIGHT,
+ g_param_spec_double ("height", "Height",
+ "Sets the height of fonts",1.0,5.0,
+ DEFAULT_HEIGHT, G_PARAM_READWRITE|G_PARAM_STATIC_STRINGS));
+
+ g_object_class_install_property (gobject_class, PROP_WIDTH,
+ g_param_spec_double ("width", "Width",
+ "Sets the width of fonts",1.0,5.0,
+ DEFAULT_WIDTH, G_PARAM_READWRITE| G_PARAM_STATIC_STRINGS));
+
+}
+
+/* initialize the new element
+ * instantiate pads and add them to element
+ * set pad calback functions
+ * initialize instance structure
+ */
+static void
+gst_textwrite_init (Gsttextwrite * filter,
+ GsttextwriteClass * gclass)
+{
+ filter->sinkpad = gst_pad_new_from_static_template (&sink_factory, "sink");
+ gst_pad_set_setcaps_function (filter->sinkpad,
+ GST_DEBUG_FUNCPTR(gst_textwrite_set_caps));
+ gst_pad_set_getcaps_function (filter->sinkpad,
+ GST_DEBUG_FUNCPTR(gst_pad_proxy_getcaps));
+ gst_pad_set_chain_function (filter->sinkpad,
+ GST_DEBUG_FUNCPTR(gst_textwrite_chain));
+
+ filter->srcpad = gst_pad_new_from_static_template (&src_factory, "src");
+ gst_pad_set_getcaps_function (filter->srcpad,
+ GST_DEBUG_FUNCPTR(gst_pad_proxy_getcaps));
+
+ gst_element_add_pad (GST_ELEMENT (filter), filter->sinkpad);
+ gst_element_add_pad (GST_ELEMENT (filter), filter->srcpad);
+ filter->textbuf = g_strdup (DEFAULT_PROP_TEXT);
+ filter->width=DEFAULT_PROP_WIDTH;
+ filter->height=DEFAULT_PROP_HEIGHT;
+
+}
+
+static void
+gst_textwrite_set_property (GObject * object, guint prop_id,
+ const GValue * value, GParamSpec * pspec)
+{
+ Gsttextwrite *filter = GST_textwrite (object);
+
+ switch (prop_id) {
+ case PROP_TEXT:
+ g_free (filter->textbuf);
+ filter->textbuf = g_value_dup_string (value);
+ break;
+ case PROP_HEIGHT:
+ filter->height = g_value_get_double(value);
+ break;
+ case PROP_WIDTH:
+ filter->width = g_value_get_double(value);
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+static void
+gst_textwrite_get_property (GObject * object, guint prop_id,
+ GValue * value, GParamSpec * pspec)
+{
+ Gsttextwrite *filter = GST_textwrite (object);
+
+ switch (prop_id) {
+ case PROP_TEXT:
+ g_value_set_string (value, filter->textbuf);
+ break;
+ case PROP_HEIGHT:
+ g_value_set_double (value, filter->height);
+ break;
+ case PROP_WIDTH:
+ g_value_set_double (value, filter->width);
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+/* GstElement vmethod implementations */
+
+/* this function handles the link with other elements */
+static gboolean
+gst_textwrite_set_caps (GstPad * pad, GstCaps * caps)
+{
+ Gsttextwrite *filter;
+ GstPad *otherpad;
+
+ gint width, height;
+ GstStructure *structure;
+
+ filter = GST_textwrite (gst_pad_get_parent (pad));
+
+ structure = gst_caps_get_structure (caps, 0);
+ gst_structure_get_int (structure, "width", &width);
+ gst_structure_get_int (structure, "height", &height);
+
+ filter->cvImage = cvCreateImage (cvSize (width, height), IPL_DEPTH_8U, 3);
+ filter->cvStorage = cvCreateMemStorage (0);
+
+ otherpad = (pad == filter->srcpad) ? filter->sinkpad : filter->srcpad;
+ gst_object_unref (filter);
+
+ return gst_pad_set_caps (otherpad, caps);
+}
+
+/* chain function
+ * this function does the actual processing
+ */
+static GstFlowReturn
+gst_textwrite_chain (GstPad * pad, GstBuffer * buf)
+{
+ Gsttextwrite *filter;
+
+ filter = GST_textwrite (GST_OBJECT_PARENT (pad));
+
+ filter->cvImage->imageData = (char *) GST_BUFFER_DATA (buf);
+ int lineWidth=1;
+ cvInitFont(&(filter->font),CV_FONT_VECTOR0, filter->width,filter->height,0,lineWidth,0);
+
+
+ cvPutText (filter->cvImage,filter->textbuf,cvPoint(100,100), &(filter->font), cvScalar(165,14,14,0));
+
+
+ gst_buffer_set_data (buf, filter->cvImage->imageData,filter->cvImage->imageSize);
+
+
+ return gst_pad_push (filter->srcpad, buf);
+}
+
+
+/* entry point to initialize the plug-in
+ * initialize the plug-in itself
+ * register the element factories and other features
+ */
+gboolean
+gst_textwrite_plugin_init (GstPlugin * plugin)
+{
+ /* debug category for fltering log messages
+ *
+ * exchange the string 'Template textwrite' with your description
+ */
+ GST_DEBUG_CATEGORY_INIT (gst_textwrite_debug, "textwrite",
+ 0, "Template textwrite");
+
+ return gst_element_register (plugin, "textwrite", GST_RANK_NONE,
+ GST_TYPE_textwrite);
+}
+
+
--- /dev/null
+/*
+ * GStreamer
+ * Copyright (C) 2005 Thomas Vander Stichele <thomas@apestaart.org>
+ * Copyright (C) 2005 Ronald S. Bultje <rbultje@ronald.bitfreak.net>
+ * Copyright (C) 2010 root <<user@hostname.org>>m
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ *
+ * Alternatively, the contents of this file may be used under the
+ * GNU Lesser General Public License Version 2.1 (the "LGPL"), in
+ * which case the following provisions apply instead of the ones
+ * mentioned above:
+ *
+ * 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_textwrite_H__
+#define __GST_textwrite_H__
+
+#include <gst/gst.h>
+//sreechage
+#include <cv.h>
+#include <cvaux.h>
+#include <highgui.h>
+G_BEGIN_DECLS
+
+/* #defines don't like whitespacey bits */
+#define GST_TYPE_textwrite \
+ (gst_textwrite_get_type())
+#define GST_textwrite(obj) \
+ (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_textwrite,Gsttextwrite))
+#define GST_textwrite_CLASS(klass) \
+ (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_textwrite,GsttextwriteClass))
+#define GST_IS_textwrite(obj) \
+ (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_textwrite))
+#define GST_IS_textwrite_CLASS(klass) \
+ (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_textwrite))
+
+typedef struct _Gsttextwrite Gsttextwrite;
+typedef struct _GsttextwriteClass GsttextwriteClass;
+
+struct _Gsttextwrite
+{
+ GstElement element;
+
+ GstPad *sinkpad, *srcpad;
+
+
+ IplImage *cvImage;
+ CvMemStorage *cvStorage;
+ CvFont font;
+
+ gdouble height;
+ gdouble width;
+ gchar *textbuf;
+
+};
+
+struct _GsttextwriteClass
+{
+ GstElementClass parent_class;
+};
+
+GType gst_textwrite_get_type (void);
+gboolean gst_textwrite_plugin_init (GstPlugin * plugin);
+
+G_END_DECLS
+
+#endif /* __GST_textwrite_H__ */
projects / platform / upstream / gst-plugins-bad.git / commitdiff