--- /dev/null
+/*
+ * GStreamer faceoverlay plugin
+ * Copyright (C) 2011 Laura Lucas Alday <lauralucas@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-faceoverlay
+ *
+ * Overlays a SVG image over a detected face in a video stream.
+ * x, y, w, and h properties are optional, and change the image position and
+ * size relative to the detected face position and size.
+ *
+ * <refsect2>
+ * <title>Example launch line</title>
+ * |[
+ * gst-launch autovideosrc ! ffmpegcolorspace ! faceoverlay location=/path/to/gnome-video-effects/pixmaps/bow.svg x=-5 y=-15 w=0.3 h=0.1 ! ffmpegcolorspace ! autovideosink
+
+ * ]|
+ * </refsect2>
+ */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <gst/gst.h>
+#include <gst/video/video.h>
+#include <string.h>
+
+#include "gstfaceoverlay.h"
+
+GST_DEBUG_CATEGORY_STATIC (gst_face_overlay_debug);
+#define GST_CAT_DEFAULT gst_face_overlay_debug
+
+#if G_BYTE_ORDER == G_LITTLE_ENDIAN
+#define GST_STR_VIDEO_CAPS GST_VIDEO_CAPS_BGRA
+#else
+#define GST_STR_VIDEO_CAPS GST_VIDEO_CAPS_ARGB
+#endif
+
+/* Filter signals and args */
+enum
+{
+ /* FILL ME */
+ LAST_SIGNAL
+};
+
+enum
+{
+ PROP_0,
+ PROP_LOCATION,
+ PROP_X,
+ PROP_Y,
+ PROP_W,
+ PROP_H
+};
+
+/* the capabilities of the inputs and outputs. */
+static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink",
+ GST_PAD_SINK,
+ GST_PAD_ALWAYS,
+ GST_STATIC_CAPS (GST_STR_VIDEO_CAPS)
+ );
+
+static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
+ GST_PAD_SRC,
+ GST_PAD_ALWAYS,
+ GST_STATIC_CAPS (GST_STR_VIDEO_CAPS)
+ );
+
+GST_BOILERPLATE (GstFaceOverlay, gst_face_overlay, GstBin, GST_TYPE_BIN);
+
+static void gst_face_overlay_set_property (GObject * object, guint prop_id,
+ const GValue * value, GParamSpec * pspec);
+static void gst_face_overlay_get_property (GObject * object, guint prop_id,
+ GValue * value, GParamSpec * pspec);
+static void gst_face_overlay_message_handler (GstBin * bin,
+ GstMessage * message);
+static GstStateChangeReturn gst_face_overlay_change_state (GstElement * element,
+ GstStateChange transition);
+static gboolean gst_face_overlay_create_children (GstFaceOverlay * filter);
+static gboolean gst_face_overlay_reset (GstFaceOverlay * filter);
+static gboolean gst_face_overlay_create_pad (GstFaceOverlay * filter,
+ GstPad * filter_pad, const char *pad_name, GstElement * child_element);
+static gboolean toggle_pads_link_state (GstPad * pad1, GstPad * pad2);
+
+
+static gboolean
+toggle_pads_link_state (GstPad * pad1, GstPad * pad2)
+{
+ gboolean ok = TRUE;
+
+ if (gst_pad_is_linked (pad1)) {
+ if (gst_pad_get_direction (pad1) == GST_PAD_SINK)
+ gst_pad_unlink (pad2, pad1);
+ else
+ gst_pad_unlink (pad1, pad2);
+ } else {
+ if (gst_pad_get_direction (pad1) == GST_PAD_SINK)
+ ok &= (gst_pad_link (pad2, pad1) == 0);
+ else
+ ok &= (gst_pad_link (pad1, pad2) == 0);
+ }
+
+ return ok;
+}
+
+/* Unlinks and removes the pad that was created in gst_face_overlay_init ()
+ * and adds the internal element ghost pad instead */
+static gboolean
+gst_face_overlay_create_pad (GstFaceOverlay * filter, GstPad * filter_pad,
+ const char *pad_name, GstElement * child_element)
+{
+ GstPad *peer = NULL;
+ GstPad *pad = NULL;
+ gboolean ok = TRUE;
+
+ /* get the outside world pad connected to faceoverlay src/sink pad */
+ peer = gst_pad_get_peer (filter_pad);
+
+ /* unlink and remove the faceoverlay src/sink pad */
+ toggle_pads_link_state (peer, filter_pad);
+
+ gst_element_remove_pad (GST_ELEMENT (filter), filter_pad);
+
+ /* add a ghost pad pointing to the child element pad (facedetect sink or
+ * svg_overlay src depending on filter_pad direction) and add it to
+ * faceoverlay bin */
+ pad = gst_element_get_static_pad (child_element, pad_name);
+ filter_pad = gst_ghost_pad_new (pad_name, pad);
+ gst_object_unref (GST_OBJECT (pad));
+
+ gst_element_add_pad (GST_ELEMENT (filter), filter_pad);
+
+ /* link the child element pad to the outside world thru the ghost pad */
+ toggle_pads_link_state (peer, filter_pad);
+
+ g_object_unref (peer);
+
+ return ok;
+}
+
+static gboolean
+gst_face_overlay_reset (GstFaceOverlay * filter)
+{
+ gst_element_set_state (filter->face_detect, GST_STATE_NULL);
+ gst_bin_remove (GST_BIN (filter), filter->face_detect);
+ filter->face_detect = NULL;
+
+ gst_element_set_state (filter->svg_overlay, GST_STATE_NULL);
+ gst_bin_remove (GST_BIN (filter), filter->svg_overlay);
+ filter->svg_overlay = NULL;
+
+ gst_element_set_state (filter->colorspace, GST_STATE_NULL);
+ gst_bin_remove (GST_BIN (filter), filter->colorspace);
+ filter->colorspace = NULL;
+
+ return TRUE;
+}
+
+static gboolean
+gst_face_overlay_create_children (GstFaceOverlay * filter)
+{
+ gboolean ret = TRUE;
+
+ if ((filter->colorspace = gst_element_factory_make ("ffmpegcolorspace",
+ NULL)) == NULL) {
+ return FALSE;
+ }
+
+ if ((filter->face_detect = gst_element_factory_make ("facedetect",
+ NULL)) == NULL) {
+ return FALSE;
+ }
+ g_object_set (filter->face_detect, "display", 0, NULL);
+
+ if ((filter->svg_overlay = gst_element_factory_make ("rsvgoverlay",
+ NULL)) == NULL) {
+ return FALSE;
+ }
+
+ gst_bin_add_many (GST_BIN (filter),
+ filter->face_detect, filter->colorspace, filter->svg_overlay, NULL);
+
+ ret &= gst_element_link_pads (filter->face_detect, "src",
+ filter->colorspace, "sink");
+ ret &= gst_element_link_pads (filter->colorspace, "src",
+ filter->svg_overlay, "sink");
+
+ ret &= gst_face_overlay_create_pad (filter, filter->sinkpad, "sink",
+ filter->face_detect);
+ ret &= gst_face_overlay_create_pad (filter, filter->srcpad, "src",
+ filter->svg_overlay);
+
+ return ret;
+
+}
+
+static GstStateChangeReturn
+gst_face_overlay_change_state (GstElement * element, GstStateChange transition)
+{
+ GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
+ GstFaceOverlay *filter = GST_FACEOVERLAY (element);
+
+ switch (transition) {
+ case GST_STATE_CHANGE_NULL_TO_READY:
+ if (!gst_face_overlay_create_children (filter))
+ return GST_STATE_CHANGE_FAILURE;
+ break;
+ default:
+ break;
+ }
+
+ ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
+
+ switch (transition) {
+ case GST_STATE_CHANGE_READY_TO_NULL:
+ gst_face_overlay_reset (filter);
+ break;
+ default:
+ break;
+ }
+
+ return ret;
+}
+
+static void
+gst_face_overlay_message_handler (GstBin * bin, GstMessage * message)
+{
+ if (GST_MESSAGE_TYPE (message) == GST_MESSAGE_ELEMENT &&
+ strcmp (gst_structure_get_name (message->structure), "facedetect") == 0) {
+ GstFaceOverlay *filter = GST_FACEOVERLAY (bin);
+
+ /* optionally draw the image once every two messages for better performance
+ * filter->process_message = !filter->process_message;
+ * if(!filter->process_message)
+ * return;
+ */
+
+ guint x, y, width, height;
+ int delta_x, delta_y, svg_x, svg_y, svg_width, svg_height;
+ const GstStructure *face;
+ int face_count;
+
+ face_count =
+ gst_value_list_get_size (gst_structure_get_value (message->structure,
+ "faces"));
+
+ /* The last face in the list seems to be the right one, objects mistakenly
+ * detected as faces for a couple of frames seem to be in the list
+ * beginning. TODO: needs confirmation. */
+ face =
+ gst_value_get_structure (gst_value_list_get_value
+ (gst_structure_get_value (message->structure, "faces"),
+ face_count - 1));
+ gst_structure_get_uint (face, "x", &x);
+ gst_structure_get_uint (face, "y", &y);
+ gst_structure_get_uint (face, "width", &width);
+ gst_structure_get_uint (face, "height", &height);
+
+ /* Apply x and y offsets relative to face position and size.
+ * Set image width and height as a fraction of face width and height.
+ * Cast to int since face position and size will never be bigger than
+ * G_MAX_INT and we may have negative values as svg_x or svg_y */
+
+ delta_x = (int) (filter->x * (int) width);
+ svg_x = (int) x + delta_x;
+
+ delta_y = (int) (filter->y * (int) height);
+ svg_y = (int) y + delta_y;
+
+ svg_width = (int) width *filter->w;
+ svg_height = (int) height *filter->h;
+
+ g_object_set (filter->svg_overlay,
+ "location", filter->location,
+ "x", svg_x, "y", svg_y, "width", svg_width, "height", svg_height, NULL);
+
+ }
+
+ GST_BIN_CLASS (parent_class)->handle_message (bin, message);
+}
+
+/* GObject vmethod implementations */
+/* the _base_init() function is meant to initialize class and child class
+ * properties during each new child class creation */
+static void
+gst_face_overlay_base_init (gpointer gclass)
+{
+ GstElementClass *element_class = GST_ELEMENT_CLASS (gclass);
+
+ gst_element_class_set_details_simple (element_class,
+ "faceoverlay",
+ "Filter/Editor/Video",
+ "Overlays SVG graphics over a detected face in a video stream",
+ "Laura Lucas Alday <lauralucas@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 faceoverlay's class */
+/* the _class_init() function is used to initialise the class only once
+ * (specifying what signals, arguments and virtual functions the class has and
+ * setting up global state) */
+static void
+gst_face_overlay_class_init (GstFaceOverlayClass * klass)
+{
+ GObjectClass *gobject_class;
+ GstBinClass *gstbin_class;
+ GstElementClass *gstelement_class;
+
+ gobject_class = G_OBJECT_CLASS (klass);
+ gstbin_class = GST_BIN_CLASS (klass);
+ gstelement_class = GST_ELEMENT_CLASS (klass);
+
+ gobject_class->set_property = gst_face_overlay_set_property;
+ gobject_class->get_property = gst_face_overlay_get_property;
+
+ g_object_class_install_property (gobject_class, PROP_LOCATION,
+ g_param_spec_string ("location", "Location",
+ "Location of SVG file to use for face overlay",
+ "", G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
+ g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_X,
+ g_param_spec_float ("x", "face x offset",
+ "Specify image x relative to detected face x.", -G_MAXFLOAT,
+ G_MAXFLOAT, 0, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
+ g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_Y,
+ g_param_spec_float ("y", "face y offset",
+ "Specify image y relative to detected face y.", -G_MAXFLOAT,
+ G_MAXFLOAT, 0, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
+ g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_W,
+ g_param_spec_float ("w", "face width percent",
+ "Specify image width relative to face width.", 0, G_MAXFLOAT, 1,
+ G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
+ g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_H,
+ g_param_spec_float ("h", "face height percent",
+ "Specify image height relative to face height.", 0, G_MAXFLOAT, 1,
+ G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
+
+ gstbin_class->handle_message =
+ GST_DEBUG_FUNCPTR (gst_face_overlay_message_handler);
+ gstelement_class->change_state =
+ GST_DEBUG_FUNCPTR (gst_face_overlay_change_state);
+
+}
+
+/* initialize the new element
+ * instantiate pads and add them to element
+ * set pad calback functions
+ * initialize instance structure
+ * the _init() function is used to initialise a specific instance of this type.
+ */
+static void
+gst_face_overlay_init (GstFaceOverlay * filter, GstFaceOverlayClass * gclass)
+{
+ filter->x = 0;
+ filter->y = 0;
+ filter->w = 1;
+ filter->h = 1;
+ filter->colorspace = NULL;
+ filter->svg_overlay = NULL;
+ filter->face_detect = NULL;
+ filter->location = NULL;
+ filter->process_message = TRUE;
+
+ filter->sinkpad = gst_pad_new_from_static_template (&sink_factory, "sink");
+ gst_element_add_pad (GST_ELEMENT (filter), filter->sinkpad);
+
+ filter->srcpad = gst_pad_new_from_static_template (&src_factory, "src");
+ gst_element_add_pad (GST_ELEMENT (filter), filter->srcpad);
+
+}
+
+static void
+gst_face_overlay_set_property (GObject * object, guint prop_id,
+ const GValue * value, GParamSpec * pspec)
+{
+ GstFaceOverlay *filter = GST_FACEOVERLAY (object);
+
+ switch (prop_id) {
+ case PROP_LOCATION:
+ filter->location = g_value_dup_string (value);
+ break;
+ case PROP_X:
+ filter->x = g_value_get_float (value);
+ break;
+ case PROP_Y:
+ filter->y = g_value_get_float (value);
+ break;
+ case PROP_W:
+ filter->w = g_value_get_float (value);
+ break;
+ case PROP_H:
+ filter->h = g_value_get_float (value);
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+static void
+gst_face_overlay_get_property (GObject * object, guint prop_id,
+ GValue * value, GParamSpec * pspec)
+{
+ GstFaceOverlay *filter = GST_FACEOVERLAY (object);
+
+ switch (prop_id) {
+ case PROP_LOCATION:
+ g_value_set_string (value, filter->location);
+ break;
+ case PROP_X:
+ g_value_set_float (value, filter->x);
+ break;
+ case PROP_Y:
+ g_value_set_float (value, filter->y);
+ break;
+ case PROP_W:
+ g_value_set_float (value, filter->w);
+ break;
+ case PROP_H:
+ g_value_set_float (value, filter->h);
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+/* entry point to initialize the plug-in
+ * initialize the plug-in itself
+ * register the element factories and other features
+ */
+static gboolean
+faceoverlay_init (GstPlugin * faceoverlay)
+{
+ /* debug category for fltering log messages */
+ GST_DEBUG_CATEGORY_INIT (gst_face_overlay_debug, "faceoverlay",
+ 0, "SVG Face Overlay");
+
+ return gst_element_register (faceoverlay, "faceoverlay", GST_RANK_NONE,
+ GST_TYPE_FACEOVERLAY);
+}
+
+/* PACKAGE: this is usually set by autotools depending on some _INIT macro
+ * in configure.ac and then written into and defined in config.h, but we can
+ * just set it ourselves here in case someone doesn't use autotools to
+ * compile this code. GST_PLUGIN_DEFINE needs PACKAGE to be defined.
+ */
+#ifndef PACKAGE
+#define PACKAGE "faceoverlay"
+#endif
+
+/* gstreamer looks for this structure to register plugins */
+GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
+ GST_VERSION_MINOR,
+ "faceoverlay",
+ "SVG Face Overlay",
+ faceoverlay_init, VERSION, "LGPL", "GStreamer", "http://gstreamer.net/")
--- /dev/null
+/*
+ * GStreamer faceoverlay plugin
+ * Copyright (C) 2011 Laura Lucas Alday <lauralucas@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.
+ */
+
+#ifndef __GST_FACEOVERLAY_H__
+#define __GST_FACEOVERLAY_H__
+
+#include <gst/gst.h>
+
+G_BEGIN_DECLS
+/* #defines don't like whitespacey bits */
+#define GST_TYPE_FACEOVERLAY \
+ (gst_face_overlay_get_type())
+#define GST_FACEOVERLAY(obj) \
+ (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_FACEOVERLAY,GstFaceOverlay))
+#define GST_FACEOVERLAY_CLASS(klass) \
+ (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_FACEOVERLAY,GstFaceOverlayClass))
+#define GST_IS_FACEOVERLAY(obj) \
+ (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_FACEOVERLAY))
+#define GST_IS_FACEOVERLAY_CLASS(klass) \
+ (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_FACEOVERLAY))
+typedef struct _GstFaceOverlay GstFaceOverlay;
+typedef struct _GstFaceOverlayClass GstFaceOverlayClass;
+
+struct _GstFaceOverlay
+{
+ GstBin parent;
+
+ GstPad *sinkpad, *srcpad;
+
+ GstElement *face_detect;
+ GstElement *colorspace;
+ GstElement *svg_overlay;
+
+ gboolean process_message;
+
+ gchar *location;
+ gfloat x;
+ gfloat y;
+ gfloat w;
+ gfloat h;
+};
+
+struct _GstFaceOverlayClass
+{
+ GstBinClass parent_class;
+};
+
+GType gst_face_overlay_get_type (void);
+
+G_END_DECLS
+#endif /* __GST_FACEOVERLAY_H__ */
projects / platform / upstream / gstreamer.git / commitdiff