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329 lines
9.8 KiB
C
329 lines
9.8 KiB
C
/*
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* GStreamer
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* Copyright (C) 2005 Thomas Vander Stichele <thomas@apestaart.org>
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* Copyright (C) 2005 Ronald S. Bultje <rbultje@ronald.bitfreak.net>
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* Copyright (C) 2008 Michael Sheldon <mike@mikeasoft.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-faceblur
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*
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* Blurs faces in images and videos.
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*
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* <refsect2>
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* <title>Example launch line</title>
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* |[
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* gst-launch-0.10 videotestsrc ! decodebin ! videoconvert ! faceblur ! videoconvert ! xvimagesink
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* ]|
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* </refsect2>
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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 "gstopencvutils.h"
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#include "gstfaceblur.h"
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GST_DEBUG_CATEGORY_STATIC (gst_face_blur_debug);
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#define GST_CAT_DEFAULT gst_face_blur_debug
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#define HAAR_CASCADES_DIR OPENCV_PREFIX "/share/opencv/haarcascades/"
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#define DEFAULT_PROFILE HAAR_CASCADES_DIR "haarcascade_frontalface_default.xml"
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/* Filter signals and args */
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enum
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{
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/* FILL ME */
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LAST_SIGNAL
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};
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enum
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{
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PROP_0,
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PROP_PROFILE
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};
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/* the capabilities of the inputs and outputs.
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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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);
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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 ("RGB"))
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);
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G_DEFINE_TYPE (GstFaceBlur, gst_face_blur, GST_TYPE_ELEMENT);
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static void gst_face_blur_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec);
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static void gst_face_blur_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec);
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static gboolean gst_face_blur_handle_sink_event (GstPad * pad,
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GstObject * parent, GstEvent * event);
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static GstFlowReturn gst_face_blur_chain (GstPad * pad, GstObject * parent,
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GstBuffer * buf);
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static void gst_face_blur_load_profile (GstFaceBlur * filter);
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/* Clean up */
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static void
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gst_face_blur_finalize (GObject * obj)
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{
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GstFaceBlur *filter = GST_FACE_BLUR (obj);
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if (filter->cvImage) {
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cvReleaseImage (&filter->cvImage);
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cvReleaseImage (&filter->cvGray);
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}
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g_free (filter->profile);
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G_OBJECT_CLASS (gst_face_blur_parent_class)->finalize (obj);
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}
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/* initialize the faceblur's class */
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static void
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gst_face_blur_class_init (GstFaceBlurClass * klass)
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{
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GObjectClass *gobject_class;
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GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
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gobject_class = (GObjectClass *) klass;
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gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_face_blur_finalize);
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gobject_class->set_property = gst_face_blur_set_property;
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gobject_class->get_property = gst_face_blur_get_property;
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g_object_class_install_property (gobject_class, PROP_PROFILE,
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g_param_spec_string ("profile", "Profile",
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"Location of Haar cascade file to use for face blurion",
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DEFAULT_PROFILE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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gst_element_class_set_static_metadata (element_class,
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"faceblur",
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"Filter/Effect/Video",
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"Blurs faces in images and videos",
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"Michael Sheldon <mike@mikeasoft.com>");
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&src_factory));
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&sink_factory));
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}
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/* initialize the new element
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* instantiate pads and add them to element
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* set pad calback functions
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* initialize instance structure
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*/
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static void
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gst_face_blur_init (GstFaceBlur * filter)
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{
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filter->sinkpad = gst_pad_new_from_static_template (&sink_factory, "sink");
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GST_PAD_SET_PROXY_CAPS (filter->sinkpad);
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gst_pad_set_event_function (filter->sinkpad,
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GST_DEBUG_FUNCPTR (gst_face_blur_handle_sink_event));
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gst_pad_set_chain_function (filter->sinkpad,
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GST_DEBUG_FUNCPTR (gst_face_blur_chain));
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filter->srcpad = gst_pad_new_from_static_template (&src_factory, "src");
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GST_PAD_SET_PROXY_CAPS (filter->srcpad);
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gst_element_add_pad (GST_ELEMENT (filter), filter->sinkpad);
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gst_element_add_pad (GST_ELEMENT (filter), filter->srcpad);
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filter->profile = g_strdup (DEFAULT_PROFILE);
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gst_face_blur_load_profile (filter);
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}
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static void
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gst_face_blur_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec)
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{
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GstFaceBlur *filter = GST_FACE_BLUR (object);
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switch (prop_id) {
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case PROP_PROFILE:
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g_free (filter->profile);
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filter->profile = g_value_dup_string (value);
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gst_face_blur_load_profile (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_blur_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec)
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{
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GstFaceBlur *filter = GST_FACE_BLUR (object);
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switch (prop_id) {
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case PROP_PROFILE:
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g_value_set_string (value, filter->profile);
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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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/* GstElement vmethod implementations */
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/* this function handles the link with other elements */
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static gboolean
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gst_face_blur_handle_sink_event (GstPad * pad, GstObject * parent,
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GstEvent * event)
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{
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GstFaceBlur *filter;
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gint width, height;
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GstStructure *structure;
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gboolean res = TRUE;
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filter = GST_FACE_BLUR (parent);
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switch (GST_EVENT_TYPE (event)) {
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case GST_EVENT_CAPS:
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{
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GstCaps *caps;
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gst_event_parse_caps (event, &caps);
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structure = gst_caps_get_structure (caps, 0);
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gst_structure_get_int (structure, "width", &width);
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gst_structure_get_int (structure, "height", &height);
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filter->cvImage = cvCreateImage (cvSize (width, height), IPL_DEPTH_8U, 3);
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filter->cvGray = cvCreateImage (cvSize (width, height), IPL_DEPTH_8U, 1);
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filter->cvStorage = cvCreateMemStorage (0);
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break;
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}
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default:
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break;
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}
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res = gst_pad_event_default (pad, parent, event);
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return res;
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}
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/* chain function
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* this function does the actual processing
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*/
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static GstFlowReturn
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gst_face_blur_chain (GstPad * pad, GstObject * parent, GstBuffer * buf)
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{
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GstFaceBlur *filter;
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CvSeq *faces;
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GstMapInfo info;
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int i;
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filter = GST_FACE_BLUR (GST_OBJECT_PARENT (pad));
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buf = gst_buffer_make_writable (buf);
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gst_buffer_map (buf, &info, GST_MAP_READWRITE);
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filter->cvImage->imageData = (char *) info.data;
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cvCvtColor (filter->cvImage, filter->cvGray, CV_RGB2GRAY);
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cvClearMemStorage (filter->cvStorage);
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if (filter->cvCascade) {
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faces =
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cvHaarDetectObjects (filter->cvGray, filter->cvCascade,
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filter->cvStorage, 1.1, 2, 0, cvSize (30, 30)
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#if (CV_MAJOR_VERSION >= 2) && (CV_MINOR_VERSION >= 2)
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, cvSize (32, 32)
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#endif
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);
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if (faces && faces->total > 0) {
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buf = gst_buffer_make_writable (buf);
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}
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for (i = 0; i < (faces ? faces->total : 0); i++) {
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CvRect *r = (CvRect *) cvGetSeqElem (faces, i);
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cvSetImageROI (filter->cvImage, *r);
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cvSmooth (filter->cvImage, filter->cvImage, CV_BLUR, 11, 11, 0, 0);
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cvSmooth (filter->cvImage, filter->cvImage, CV_GAUSSIAN, 11, 11, 0, 0);
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cvResetImageROI (filter->cvImage);
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}
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}
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/* these filters operate in place, so we push the same buffer */
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return gst_pad_push (filter->srcpad, buf);
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}
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static void
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gst_face_blur_load_profile (GstFaceBlur * filter)
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{
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filter->cvCascade =
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(CvHaarClassifierCascade *) cvLoad (filter->profile, 0, 0, 0);
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if (!filter->cvCascade) {
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GST_WARNING ("Couldn't load Haar classifier cascade: %s.", filter->profile);
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}
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}
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/* entry point to initialize the plug-in
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* initialize the plug-in itself
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* register the element factories and other features
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*/
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gboolean
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gst_face_blur_plugin_init (GstPlugin * plugin)
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{
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/* debug category for filtering log messages */
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GST_DEBUG_CATEGORY_INIT (gst_face_blur_debug, "faceblur",
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0, "Blurs faces in images and videos");
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return gst_element_register (plugin, "faceblur", GST_RANK_NONE,
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GST_TYPE_FACE_BLUR);
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}
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