gstreamer/ext/opencv/gstfaceblur.c
Sebastian Dröge e8d569f54d faceblur: set maximum feature size to 0x0
Previously faces would only be detected if they were at least 30x30 pixels
large and at most 32x32 pixels. We keep the minimum setting (maybe needs
a property as in facedetect) but disable the maximum feature size.

See https://bugzilla.gnome.org/show_bug.cgi?id=722158
2014-01-14 10:38:37 +01:00

329 lines
9.8 KiB
C

/*
* 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);
}