| /* |
| * GStreamer |
| * Copyright (C) 2005 Thomas Vander Stichele <thomas@apestaart.org> |
| * Copyright (C) 2005 Ronald S. Bultje <rbultje@ronald.bitfreak.net> |
| * Copyright (C) 2008 Michael Sheldon <mike@mikeasoft.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., 51 Franklin St, Fifth Floor, |
| * Boston, MA 02110-1301, USA. |
| */ |
| |
| /** |
| * SECTION:element-faceblur |
| * |
| * Blurs faces in images and videos. |
| * |
| * <refsect2> |
| * <title>Example launch line</title> |
| * |[ |
| * gst-launch-0.10 videotestsrc ! decodebin ! videoconvert ! faceblur ! videoconvert ! xvimagesink |
| * ]| |
| * </refsect2> |
| */ |
| |
| #ifdef HAVE_CONFIG_H |
| # include <config.h> |
| #endif |
| |
| #include <gst/gst.h> |
| |
| #include "gstopencvutils.h" |
| #include "gstfaceblur.h" |
| |
| GST_DEBUG_CATEGORY_STATIC (gst_face_blur_debug); |
| #define GST_CAT_DEFAULT gst_face_blur_debug |
| |
| #define HAAR_CASCADES_DIR OPENCV_PREFIX "/share/opencv/haarcascades/" |
| #define DEFAULT_PROFILE HAAR_CASCADES_DIR "haarcascade_frontalface_default.xml" |
| |
| /* Filter signals and args */ |
| enum |
| { |
| /* FILL ME */ |
| LAST_SIGNAL |
| }; |
| |
| enum |
| { |
| PROP_0, |
| PROP_PROFILE |
| }; |
| |
| /* 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_VIDEO_CAPS_MAKE ("RGB")) |
| ); |
| |
| static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src", |
| GST_PAD_SRC, |
| GST_PAD_ALWAYS, |
| GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE ("RGB")) |
| ); |
| |
| G_DEFINE_TYPE (GstFaceBlur, gst_face_blur, GST_TYPE_ELEMENT); |
| |
| static void gst_face_blur_set_property (GObject * object, guint prop_id, |
| const GValue * value, GParamSpec * pspec); |
| static void gst_face_blur_get_property (GObject * object, guint prop_id, |
| GValue * value, GParamSpec * pspec); |
| |
| static gboolean gst_face_blur_handle_sink_event (GstPad * pad, |
| GstObject * parent, GstEvent * event); |
| static GstFlowReturn gst_face_blur_chain (GstPad * pad, GstObject * parent, |
| GstBuffer * buf); |
| |
| static void gst_face_blur_load_profile (GstFaceBlur * filter); |
| |
| /* Clean up */ |
| static void |
| gst_face_blur_finalize (GObject * obj) |
| { |
| GstFaceBlur *filter = GST_FACE_BLUR (obj); |
| |
| if (filter->cvImage) { |
| cvReleaseImage (&filter->cvImage); |
| cvReleaseImage (&filter->cvGray); |
| } |
| |
| g_free (filter->profile); |
| |
| G_OBJECT_CLASS (gst_face_blur_parent_class)->finalize (obj); |
| } |
| |
| |
| /* initialize the faceblur's class */ |
| static void |
| gst_face_blur_class_init (GstFaceBlurClass * klass) |
| { |
| GObjectClass *gobject_class; |
| |
| GstElementClass *element_class = GST_ELEMENT_CLASS (klass); |
| gobject_class = (GObjectClass *) klass; |
| |
| gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_face_blur_finalize); |
| gobject_class->set_property = gst_face_blur_set_property; |
| gobject_class->get_property = gst_face_blur_get_property; |
| |
| g_object_class_install_property (gobject_class, PROP_PROFILE, |
| g_param_spec_string ("profile", "Profile", |
| "Location of Haar cascade file to use for face blurion", |
| DEFAULT_PROFILE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); |
| |
| gst_element_class_set_static_metadata (element_class, |
| "faceblur", |
| "Filter/Effect/Video", |
| "Blurs faces in images and videos", |
| "Michael Sheldon <mike@mikeasoft.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 new element |
| * instantiate pads and add them to element |
| * set pad calback functions |
| * initialize instance structure |
| */ |
| static void |
| gst_face_blur_init (GstFaceBlur * filter) |
| { |
| filter->sinkpad = gst_pad_new_from_static_template (&sink_factory, "sink"); |
| GST_PAD_SET_PROXY_CAPS (filter->sinkpad); |
| gst_pad_set_event_function (filter->sinkpad, |
| GST_DEBUG_FUNCPTR (gst_face_blur_handle_sink_event)); |
| gst_pad_set_chain_function (filter->sinkpad, |
| GST_DEBUG_FUNCPTR (gst_face_blur_chain)); |
| |
| filter->srcpad = gst_pad_new_from_static_template (&src_factory, "src"); |
| GST_PAD_SET_PROXY_CAPS (filter->srcpad); |
| |
| gst_element_add_pad (GST_ELEMENT (filter), filter->sinkpad); |
| gst_element_add_pad (GST_ELEMENT (filter), filter->srcpad); |
| filter->profile = g_strdup (DEFAULT_PROFILE); |
| gst_face_blur_load_profile (filter); |
| } |
| |
| static void |
| gst_face_blur_set_property (GObject * object, guint prop_id, |
| const GValue * value, GParamSpec * pspec) |
| { |
| GstFaceBlur *filter = GST_FACE_BLUR (object); |
| |
| switch (prop_id) { |
| case PROP_PROFILE: |
| g_free (filter->profile); |
| filter->profile = g_value_dup_string (value); |
| gst_face_blur_load_profile (filter); |
| break; |
| default: |
| G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); |
| break; |
| } |
| } |
| |
| static void |
| gst_face_blur_get_property (GObject * object, guint prop_id, |
| GValue * value, GParamSpec * pspec) |
| { |
| GstFaceBlur *filter = GST_FACE_BLUR (object); |
| |
| switch (prop_id) { |
| case PROP_PROFILE: |
| g_value_set_string (value, filter->profile); |
| 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_face_blur_handle_sink_event (GstPad * pad, GstObject * parent, |
| GstEvent * event) |
| { |
| GstFaceBlur *filter; |
| gint width, height; |
| GstStructure *structure; |
| gboolean res = TRUE; |
| |
| filter = GST_FACE_BLUR (parent); |
| |
| switch (GST_EVENT_TYPE (event)) { |
| case GST_EVENT_CAPS: |
| { |
| GstCaps *caps; |
| gst_event_parse_caps (event, &caps); |
| |
| 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->cvGray = cvCreateImage (cvSize (width, height), IPL_DEPTH_8U, 1); |
| filter->cvStorage = cvCreateMemStorage (0); |
| break; |
| } |
| default: |
| break; |
| } |
| |
| res = gst_pad_event_default (pad, parent, event); |
| |
| return res; |
| } |
| |
| /* chain function |
| * this function does the actual processing |
| */ |
| static GstFlowReturn |
| gst_face_blur_chain (GstPad * pad, GstObject * parent, GstBuffer * buf) |
| { |
| GstFaceBlur *filter; |
| CvSeq *faces; |
| GstMapInfo info; |
| int i; |
| |
| filter = GST_FACE_BLUR (GST_OBJECT_PARENT (pad)); |
| |
| buf = gst_buffer_make_writable (buf); |
| gst_buffer_map (buf, &info, GST_MAP_READWRITE); |
| filter->cvImage->imageData = (char *) info.data; |
| |
| cvCvtColor (filter->cvImage, filter->cvGray, CV_RGB2GRAY); |
| cvClearMemStorage (filter->cvStorage); |
| |
| if (filter->cvCascade) { |
| faces = |
| cvHaarDetectObjects (filter->cvGray, filter->cvCascade, |
| filter->cvStorage, 1.1, 2, 0, cvSize (30, 30) |
| #if (CV_MAJOR_VERSION >= 2) && (CV_MINOR_VERSION >= 2) |
| , cvSize (0, 0) |
| #endif |
| ); |
| |
| if (faces && faces->total > 0) { |
| buf = gst_buffer_make_writable (buf); |
| } |
| for (i = 0; i < (faces ? faces->total : 0); i++) { |
| CvRect *r = (CvRect *) cvGetSeqElem (faces, i); |
| cvSetImageROI (filter->cvImage, *r); |
| cvSmooth (filter->cvImage, filter->cvImage, CV_BLUR, 11, 11, 0, 0); |
| cvSmooth (filter->cvImage, filter->cvImage, CV_GAUSSIAN, 11, 11, 0, 0); |
| cvResetImageROI (filter->cvImage); |
| } |
| } |
| |
| /* these filters operate in place, so we push the same buffer */ |
| |
| return gst_pad_push (filter->srcpad, buf); |
| } |
| |
| |
| static void |
| gst_face_blur_load_profile (GstFaceBlur * filter) |
| { |
| filter->cvCascade = |
| (CvHaarClassifierCascade *) cvLoad (filter->profile, 0, 0, 0); |
| if (!filter->cvCascade) { |
| GST_WARNING ("Couldn't load Haar classifier cascade: %s.", filter->profile); |
| } |
| } |
| |
| |
| /* entry point to initialize the plug-in |
| * initialize the plug-in itself |
| * register the element factories and other features |
| */ |
| gboolean |
| gst_face_blur_plugin_init (GstPlugin * plugin) |
| { |
| /* debug category for filtering log messages */ |
| GST_DEBUG_CATEGORY_INIT (gst_face_blur_debug, "faceblur", |
| 0, "Blurs faces in images and videos"); |
| |
| return gst_element_register (plugin, "faceblur", GST_RANK_NONE, |
| GST_TYPE_FACE_BLUR); |
| } |