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447 lines
15 KiB
C
447 lines
15 KiB
C
/* GStreamer faceoverlay plugin
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* Copyright (C) 2011 Laura Lucas Alday <lauralucas@gmail.com>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*
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* Alternatively, the contents of this file may be used under the
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* GNU Lesser General Public License Version 2.1 (the "LGPL"), in
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* which case the following provisions apply instead of the ones
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* mentioned above:
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free 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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/**
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* SECTION:element-faceoverlay
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*
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* Overlays a SVG image over a detected face in a video stream.
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* x, y, w, and h properties are optional, and change the image position and
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* size relative to the detected face position and size.
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*
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* ## Example launch line
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*
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* |[
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* gst-launch-1.0 autovideosrc ! videoconvert ! faceoverlay location=/path/to/gnome-video-effects/pixmaps/bow.svg x=0.5 y=0.5 w=0.7 h=0.7 ! videoconvert ! autovideosink
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* ]|
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*/
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include <gst/gst.h>
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#include <gst/video/video.h>
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#include <string.h>
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#include "gstfaceoverlay.h"
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GST_DEBUG_CATEGORY_STATIC (gst_face_overlay_debug);
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#define GST_CAT_DEFAULT gst_face_overlay_debug
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enum
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{
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PROP_0,
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PROP_LOCATION,
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PROP_X,
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PROP_Y,
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PROP_W,
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PROP_H
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};
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static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink",
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GST_PAD_SINK,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE ("{RGB}")));
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static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
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GST_PAD_SRC,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE ("{BGRA}")));
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#define gst_face_overlay_parent_class parent_class
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G_DEFINE_TYPE (GstFaceOverlay, gst_face_overlay, GST_TYPE_BIN);
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GST_ELEMENT_REGISTER_DEFINE_WITH_CODE (faceoverlay, "faceoverlay",
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GST_RANK_NONE, GST_TYPE_FACEOVERLAY,
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GST_DEBUG_CATEGORY_INIT (gst_face_overlay_debug, "faceoverlay", 0,
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"SVG Face Overlay");
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);
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static void gst_face_overlay_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec);
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static void gst_face_overlay_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec);
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static void gst_face_overlay_message_handler (GstBin * bin,
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GstMessage * message);
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static GstStateChangeReturn gst_face_overlay_change_state (GstElement * element,
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GstStateChange transition);
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static gboolean gst_face_overlay_create_children (GstFaceOverlay * filter);
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static gboolean
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gst_face_overlay_create_children (GstFaceOverlay * filter)
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{
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GstElement *csp, *face_detect, *overlay;
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GstPad *pad;
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csp = gst_element_factory_make ("videoconvert", NULL);
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face_detect = gst_element_factory_make ("facedetect", NULL);
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overlay = gst_element_factory_make ("rsvgoverlay", NULL);
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/* FIXME: post missing-plugin messages on NULL->READY if needed */
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if (csp == NULL || face_detect == NULL || overlay == NULL)
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goto missing_element;
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g_object_set (face_detect, "display", FALSE, NULL);
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gst_bin_add_many (GST_BIN (filter), face_detect, csp, overlay, NULL);
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filter->svg_overlay = overlay;
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if (!gst_element_link_many (face_detect, csp, overlay, NULL))
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GST_ERROR_OBJECT (filter, "couldn't link elements");
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pad = gst_element_get_static_pad (face_detect, "sink");
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if (!gst_ghost_pad_set_target (GST_GHOST_PAD (filter->sinkpad), pad))
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GST_ERROR_OBJECT (filter->sinkpad, "couldn't set sinkpad target");
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gst_object_unref (pad);
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pad = gst_element_get_static_pad (overlay, "src");
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if (!gst_ghost_pad_set_target (GST_GHOST_PAD (filter->srcpad), pad))
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GST_ERROR_OBJECT (filter->srcpad, "couldn't set srcpad target");
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gst_object_unref (pad);
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return TRUE;
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/* ERRORS */
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missing_element:
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{
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/* clean up */
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if (csp == NULL)
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GST_ERROR_OBJECT (filter, "videoconvert element not found");
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else
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gst_object_unref (csp);
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if (face_detect == NULL)
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GST_ERROR_OBJECT (filter, "facedetect element not found (opencv plugin)");
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else
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gst_object_unref (face_detect);
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if (overlay == NULL)
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GST_ERROR_OBJECT (filter, "rsvgoverlay element not found (rsvg plugin)");
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else
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gst_object_unref (overlay);
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return FALSE;
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}
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}
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static GstStateChangeReturn
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gst_face_overlay_change_state (GstElement * element, GstStateChange transition)
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{
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GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
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GstFaceOverlay *filter = GST_FACEOVERLAY (element);
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switch (transition) {
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case GST_STATE_CHANGE_NULL_TO_READY:
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if (filter->svg_overlay == NULL) {
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GST_ELEMENT_ERROR (filter, CORE, MISSING_PLUGIN, (NULL),
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("Some required plugins are missing, probably either the opencv "
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"facedetect element or rsvgoverlay"));
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return GST_STATE_CHANGE_FAILURE;
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}
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filter->update_svg = TRUE;
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break;
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default:
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break;
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}
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ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
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switch (transition) {
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default:
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break;
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}
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return ret;
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}
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static void
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gst_face_overlay_handle_faces (GstFaceOverlay * filter, const GstStructure * s)
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{
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guint x, y, width, height;
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gint svg_x, svg_y, svg_width, svg_height;
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const GstStructure *face;
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const GValue *faces_list, *face_val;
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gchar *new_location = NULL;
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gint face_count;
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#if 0
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/* optionally draw the image once every two messages for better performance */
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filter->process_message = !filter->process_message;
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if (!filter->process_message)
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return;
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#endif
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faces_list = gst_structure_get_value (s, "faces");
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face_count = gst_value_list_get_size (faces_list);
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GST_LOG_OBJECT (filter, "face count: %d", face_count);
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if (face_count == 0) {
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GST_DEBUG_OBJECT (filter, "no face, clearing overlay");
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g_object_set (filter->svg_overlay, "location", NULL, NULL);
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GST_OBJECT_LOCK (filter);
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filter->update_svg = TRUE;
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GST_OBJECT_UNLOCK (filter);
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return;
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}
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/* The last face in the list seems to be the right one, objects mistakenly
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* detected as faces for a couple of frames seem to be in the list
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* beginning. TODO: needs confirmation. */
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face_val = gst_value_list_get_value (faces_list, face_count - 1);
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face = gst_value_get_structure (face_val);
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gst_structure_get_uint (face, "x", &x);
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gst_structure_get_uint (face, "y", &y);
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gst_structure_get_uint (face, "width", &width);
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gst_structure_get_uint (face, "height", &height);
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/* Apply x and y offsets relative to face position and size.
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* Set image width and height as a fraction of face width and height.
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* Cast to int since face position and size will never be bigger than
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* G_MAX_INT and we may have negative values as svg_x or svg_y */
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GST_OBJECT_LOCK (filter);
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svg_x = (gint) x + (gint) (filter->x * width);
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svg_y = (gint) y + (gint) (filter->y * height);
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svg_width = (gint) (filter->w * width);
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svg_height = (gint) (filter->h * height);
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if (filter->update_svg) {
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new_location = g_strdup (filter->location);
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filter->update_svg = FALSE;
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}
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GST_OBJECT_UNLOCK (filter);
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if (new_location != NULL) {
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GST_DEBUG_OBJECT (filter, "set rsvgoverlay location=%s", new_location);
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g_object_set (filter->svg_overlay, "location", new_location, NULL);
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g_free (new_location);
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}
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GST_LOG_OBJECT (filter, "overlay dimensions: %d x %d @ %d,%d",
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svg_width, svg_height, svg_x, svg_y);
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g_object_set (filter->svg_overlay,
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"x", svg_x, "y", svg_y, "width", svg_width, "height", svg_height, NULL);
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}
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static void
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gst_face_overlay_message_handler (GstBin * bin, GstMessage * message)
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{
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if (GST_MESSAGE_TYPE (message) == GST_MESSAGE_ELEMENT) {
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const GstStructure *s = gst_message_get_structure (message);
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if (gst_structure_has_name (s, "facedetect")) {
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gst_face_overlay_handle_faces (GST_FACEOVERLAY (bin), s);
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}
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}
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GST_BIN_CLASS (parent_class)->handle_message (bin, message);
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}
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static void
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gst_face_overlay_class_init (GstFaceOverlayClass * klass)
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{
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GObjectClass *gobject_class;
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GstBinClass *gstbin_class;
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GstElementClass *gstelement_class;
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gobject_class = G_OBJECT_CLASS (klass);
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gstbin_class = GST_BIN_CLASS (klass);
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gstelement_class = GST_ELEMENT_CLASS (klass);
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gobject_class->set_property = gst_face_overlay_set_property;
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gobject_class->get_property = gst_face_overlay_get_property;
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g_object_class_install_property (gobject_class, PROP_LOCATION,
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g_param_spec_string ("location", "Location",
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"Location of SVG file to use for face overlay",
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"", G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_X,
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g_param_spec_float ("x", "face x offset",
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"Specify image x relative to detected face x.", -G_MAXFLOAT,
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G_MAXFLOAT, 0, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_Y,
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g_param_spec_float ("y", "face y offset",
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"Specify image y relative to detected face y.", -G_MAXFLOAT,
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G_MAXFLOAT, 0, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_W,
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g_param_spec_float ("w", "face width percent",
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"Specify image width relative to face width.", 0, G_MAXFLOAT, 1,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_H,
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g_param_spec_float ("h", "face height percent",
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"Specify image height relative to face height.", 0, G_MAXFLOAT, 1,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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gst_element_class_set_static_metadata (gstelement_class,
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"faceoverlay",
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"Filter/Editor/Video",
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"Overlays SVG graphics over a detected face in a video stream",
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"Laura Lucas Alday <lauralucas@gmail.com>");
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gst_element_class_add_pad_template (gstelement_class,
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gst_static_pad_template_get (&src_factory));
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gst_element_class_add_pad_template (gstelement_class,
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gst_static_pad_template_get (&sink_factory));
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gstbin_class->handle_message =
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GST_DEBUG_FUNCPTR (gst_face_overlay_message_handler);
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gstelement_class->change_state =
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GST_DEBUG_FUNCPTR (gst_face_overlay_change_state);
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}
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static void
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gst_face_overlay_init (GstFaceOverlay * filter)
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{
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GstPadTemplate *tmpl;
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filter->x = 0;
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filter->y = 0;
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filter->w = 1;
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filter->h = 1;
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filter->svg_overlay = NULL;
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filter->location = NULL;
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filter->process_message = TRUE;
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tmpl = gst_static_pad_template_get (&sink_factory);
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filter->sinkpad = gst_ghost_pad_new_no_target_from_template ("sink", tmpl);
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gst_object_unref (tmpl);
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gst_element_add_pad (GST_ELEMENT (filter), filter->sinkpad);
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tmpl = gst_static_pad_template_get (&src_factory);
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filter->srcpad = gst_ghost_pad_new_no_target_from_template ("src", tmpl);
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gst_object_unref (tmpl);
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gst_element_add_pad (GST_ELEMENT (filter), filter->srcpad);
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gst_face_overlay_create_children (filter);
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}
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static void
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gst_face_overlay_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec)
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{
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GstFaceOverlay *filter = GST_FACEOVERLAY (object);
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switch (prop_id) {
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case PROP_LOCATION:
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GST_OBJECT_LOCK (filter);
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g_free (filter->location);
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filter->location = g_value_dup_string (value);
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filter->update_svg = TRUE;
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GST_OBJECT_UNLOCK (filter);
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break;
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case PROP_X:
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GST_OBJECT_LOCK (filter);
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filter->x = g_value_get_float (value);
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GST_OBJECT_UNLOCK (filter);
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break;
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case PROP_Y:
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GST_OBJECT_LOCK (filter);
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filter->y = g_value_get_float (value);
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GST_OBJECT_UNLOCK (filter);
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break;
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case PROP_W:
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GST_OBJECT_LOCK (filter);
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filter->w = g_value_get_float (value);
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GST_OBJECT_UNLOCK (filter);
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break;
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case PROP_H:
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GST_OBJECT_LOCK (filter);
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filter->h = g_value_get_float (value);
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GST_OBJECT_UNLOCK (filter);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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gst_face_overlay_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec)
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{
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GstFaceOverlay *filter = GST_FACEOVERLAY (object);
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switch (prop_id) {
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case PROP_LOCATION:
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GST_OBJECT_LOCK (filter);
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g_value_set_string (value, filter->location);
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GST_OBJECT_UNLOCK (filter);
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break;
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case PROP_X:
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GST_OBJECT_LOCK (filter);
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g_value_set_float (value, filter->x);
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GST_OBJECT_UNLOCK (filter);
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break;
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case PROP_Y:
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GST_OBJECT_LOCK (filter);
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g_value_set_float (value, filter->y);
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GST_OBJECT_UNLOCK (filter);
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break;
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case PROP_W:
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GST_OBJECT_LOCK (filter);
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g_value_set_float (value, filter->w);
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GST_OBJECT_UNLOCK (filter);
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break;
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case PROP_H:
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GST_OBJECT_LOCK (filter);
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g_value_set_float (value, filter->h);
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GST_OBJECT_UNLOCK (filter);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static gboolean
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faceoverlay_init (GstPlugin * plugin)
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{
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return GST_ELEMENT_REGISTER (faceoverlay, plugin);
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}
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GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
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GST_VERSION_MINOR,
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faceoverlay,
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"SVG Face Overlay",
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faceoverlay_init, VERSION, "LGPL", GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)
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