gstreamer/ext/opencv/gstfaceblur.cpp

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/*
* 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>
* Copyright (C) 2011 Robert Jobbagy <jobbagy.robert@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., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
/**
* SECTION:element-faceblur
*
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* Blurs faces in images and videos.
*
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* ## Example launch line
*
* |[
* gst-launch-1.0 autovideosrc ! videoconvert ! faceblur ! videoconvert ! autovideosink
* ]|
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <vector>
#include "gstfaceblur.h"
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#include <opencv2/imgproc.hpp>
GST_DEBUG_CATEGORY_STATIC (gst_face_blur_debug);
#define GST_CAT_DEFAULT gst_face_blur_debug
#define DEFAULT_PROFILE OPENCV_PREFIX G_DIR_SEPARATOR_S "share" \
G_DIR_SEPARATOR_S OPENCV_PATH_NAME G_DIR_SEPARATOR_S "haarcascades" \
G_DIR_SEPARATOR_S "haarcascade_frontalface_default.xml"
#define DEFAULT_SCALE_FACTOR 1.25
#if (CV_MAJOR_VERSION >= 4)
#define DEFAULT_FLAGS CASCADE_DO_CANNY_PRUNING
#else
#define DEFAULT_FLAGS CV_HAAR_DO_CANNY_PRUNING
#endif
#define DEFAULT_MIN_NEIGHBORS 3
#define DEFAULT_MIN_SIZE_WIDTH 30
#define DEFAULT_MIN_SIZE_HEIGHT 30
using namespace cv;
using namespace std;
enum
{
PROP_0,
PROP_PROFILE,
PROP_SCALE_FACTOR,
PROP_MIN_NEIGHBORS,
PROP_FLAGS,
PROP_MIN_SIZE_WIDTH,
PROP_MIN_SIZE_HEIGHT
};
/**
* GstOpencvFaceDetectFlags:
* @GST_CAMERABIN_FLAG_SOURCE_RESIZE: enable video crop and scale
* after capture
*
* Flags parameter to OpenCV's cvHaarDetectObjects function.
*/
typedef enum
{
GST_OPENCV_FACE_BLUR_HAAR_DO_CANNY_PRUNING = (1 << 0)
} GstOpencvFaceBlurFlags;
#define GST_TYPE_OPENCV_FACE_BLUR_FLAGS (gst_opencv_face_blur_flags_get_type())
static void
register_gst_opencv_face_blur_flags (GType * id)
{
static const GFlagsValue values[] = {
{(guint) GST_OPENCV_FACE_BLUR_HAAR_DO_CANNY_PRUNING,
"Do Canny edge detection to discard some regions", "do-canny-pruning"},
{0, NULL, NULL}
};
*id = g_flags_register_static ("GstOpencvFaceBlurFlags", values);
}
static GType
gst_opencv_face_blur_flags_get_type (void)
{
static GType id;
static GOnce once = G_ONCE_INIT;
g_once (&once, (GThreadFunc) register_gst_opencv_face_blur_flags, &id);
return id;
}
/* 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_WITH_CODE (GstFaceBlur, gst_face_blur,
GST_TYPE_OPENCV_VIDEO_FILTER, GST_DEBUG_CATEGORY_INIT (gst_face_blur_debug,
"faceblur", 0, "Blurs faces in images and videos"););
GST_ELEMENT_REGISTER_DEFINE (faceblur, "faceblur", GST_RANK_NONE,
GST_TYPE_FACE_BLUR);
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_set_caps (GstOpencvVideoFilter * transform,
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gint in_width, gint in_height, int in_cv_type,
gint out_width, gint out_height, int out_cv_type);
static GstFlowReturn gst_face_blur_transform_ip (GstOpencvVideoFilter *
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transform, GstBuffer * buffer, Mat img);
static CascadeClassifier *gst_face_blur_load_profile (GstFaceBlur *
filter, gchar * profile);
/* Clean up */
static void
gst_face_blur_finalize (GObject * obj)
{
GstFaceBlur *filter = GST_FACE_BLUR (obj);
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filter->cvGray.release ();
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if (filter->cvCascade)
delete filter->cvCascade;
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;
GstOpencvVideoFilterClass *gstopencvbasefilter_class;
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
gobject_class = (GObjectClass *) klass;
gstopencvbasefilter_class = (GstOpencvVideoFilterClass *) klass;
gstopencvbasefilter_class->cv_trans_ip_func = gst_face_blur_transform_ip;
gstopencvbasefilter_class->cv_set_caps = gst_face_blur_set_caps;
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,
(GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)));
g_object_class_install_property (gobject_class, PROP_FLAGS,
g_param_spec_flags ("flags", "Flags", "Flags to cvHaarDetectObjects",
GST_TYPE_OPENCV_FACE_BLUR_FLAGS, DEFAULT_FLAGS,
(GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)));
g_object_class_install_property (gobject_class, PROP_SCALE_FACTOR,
g_param_spec_double ("scale-factor", "Scale factor",
"Factor by which the windows is scaled after each scan", 1.1, 10.0,
DEFAULT_SCALE_FACTOR,
(GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)));
g_object_class_install_property (gobject_class, PROP_MIN_NEIGHBORS,
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g_param_spec_int ("min-neighbors", "Minimum neighbors",
"Minimum number (minus 1) of neighbor rectangles that makes up "
"an object", 0, G_MAXINT, DEFAULT_MIN_NEIGHBORS,
(GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)));
g_object_class_install_property (gobject_class, PROP_MIN_SIZE_WIDTH,
g_param_spec_int ("min-size-width", "Minimum size width",
"Minimum window width size", 0, G_MAXINT, DEFAULT_MIN_SIZE_WIDTH,
(GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)));
g_object_class_install_property (gobject_class, PROP_MIN_SIZE_HEIGHT,
g_param_spec_int ("min-size-height", "Minimum size height",
"Minimum window height size", 0, G_MAXINT, DEFAULT_MIN_SIZE_HEIGHT,
(GParamFlags) (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>,Robert Jobbagy <jobbagy.robert@gmail.com>");
gst_element_class_add_static_pad_template (element_class, &src_factory);
gst_element_class_add_static_pad_template (element_class, &sink_factory);
gst_type_mark_as_plugin_api (GST_TYPE_OPENCV_FACE_BLUR_FLAGS, (GstPluginAPIFlags) 0);
}
/* initialize the new element
* instantiate pads and add them to element
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* set pad callback functions
* initialize instance structure
*/
static void
gst_face_blur_init (GstFaceBlur * filter)
{
filter->profile = g_strdup (DEFAULT_PROFILE);
filter->cvCascade = gst_face_blur_load_profile (filter, filter->profile);
filter->sent_profile_load_failed_msg = FALSE;
filter->scale_factor = DEFAULT_SCALE_FACTOR;
filter->min_neighbors = DEFAULT_MIN_NEIGHBORS;
filter->flags = DEFAULT_FLAGS;
filter->min_size_width = DEFAULT_MIN_SIZE_WIDTH;
filter->min_size_height = DEFAULT_MIN_SIZE_HEIGHT;
gst_opencv_video_filter_set_in_place (GST_OPENCV_VIDEO_FILTER_CAST (filter),
TRUE);
}
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);
if (filter->cvCascade)
delete filter->cvCascade;
filter->profile = g_value_dup_string (value);
filter->cvCascade = gst_face_blur_load_profile (filter, filter->profile);
filter->sent_profile_load_failed_msg = FALSE;
break;
case PROP_SCALE_FACTOR:
filter->scale_factor = g_value_get_double (value);
break;
case PROP_MIN_NEIGHBORS:
filter->min_neighbors = g_value_get_int (value);
break;
case PROP_MIN_SIZE_WIDTH:
filter->min_size_width = g_value_get_int (value);
break;
case PROP_MIN_SIZE_HEIGHT:
filter->min_size_height = g_value_get_int (value);
break;
case PROP_FLAGS:
filter->flags = g_value_get_flags (value);
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;
case PROP_SCALE_FACTOR:
g_value_set_double (value, filter->scale_factor);
break;
case PROP_MIN_NEIGHBORS:
g_value_set_int (value, filter->min_neighbors);
break;
case PROP_MIN_SIZE_WIDTH:
g_value_set_int (value, filter->min_size_width);
break;
case PROP_MIN_SIZE_HEIGHT:
g_value_set_int (value, filter->min_size_height);
break;
case PROP_FLAGS:
g_value_set_flags (value, filter->flags);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static gboolean
gst_face_blur_set_caps (GstOpencvVideoFilter * transform,
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gint in_width, gint in_height, int in_cv_type,
gint out_width, gint out_height, int out_cv_type)
{
GstFaceBlur *filter = GST_FACE_BLUR (transform);
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filter->cvGray.create (Size (in_width, in_height), CV_8UC1);
return TRUE;
}
static GstFlowReturn
gst_face_blur_transform_ip (GstOpencvVideoFilter * transform,
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GstBuffer * buffer, Mat img)
{
GstFaceBlur *filter = GST_FACE_BLUR (transform);
vector < Rect > faces;
unsigned int i;
if (!filter->cvCascade) {
if (filter->profile != NULL
&& filter->sent_profile_load_failed_msg == FALSE) {
GST_ELEMENT_WARNING (filter, RESOURCE, NOT_FOUND,
("Profile %s is missing.", filter->profile),
("missing faceblur profile file %s", filter->profile));
filter->sent_profile_load_failed_msg = TRUE;
}
return GST_FLOW_OK;
}
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cvtColor (img, filter->cvGray, COLOR_RGB2GRAY);
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filter->cvCascade->detectMultiScale (filter->cvGray, faces,
filter->scale_factor, filter->min_neighbors, filter->flags,
Size (filter->min_size_width, filter->min_size_height), Size (0, 0));
if (!faces.empty ()) {
for (i = 0; i < faces.size (); ++i) {
Rect *r = &faces[i];
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Mat roi (img, Rect (r->x, r->y, r->width, r->height));
blur (roi, roi, Size (11, 11));
GaussianBlur (roi, roi, Size (11, 11), 0, 0);
}
}
return GST_FLOW_OK;
}
static CascadeClassifier *
gst_face_blur_load_profile (GstFaceBlur * filter, gchar * profile)
{
CascadeClassifier *cascade;
cascade = new CascadeClassifier (profile);
if (cascade->empty ()) {
GST_ERROR_OBJECT (filter, "Invalid profile file: %s", profile);
delete cascade;
return NULL;
}
return cascade;
}