gstreamer/ext/opencv/gstfaceblur.c
Stefan Sauer d4509a2fda opencv: use opencv prefix from pkgconfig to lookup datafiles
Don't hardconde /usr to lookup datafiles (such as haar cascades).
2012-03-16 12:58:56 +01:00

319 lines
9.7 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., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/**
* SECTION:element-faceblur
*
* Blurs faces in images and videos.
*
* <refsect2>
* <title>Example launch line</title>
* |[
* gst-launch-0.10 videotestsrc ! decodebin ! ffmpegcolorspace ! faceblur ! ffmpegcolorspace ! 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_RGB)
);
static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_RGB)
);
GST_BOILERPLATE (GstFaceBlur, gst_face_blur, GstElement, 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_set_caps (GstPad * pad, GstCaps * caps);
static GstFlowReturn gst_face_blur_chain (GstPad * pad, 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 (parent_class)->finalize (obj);
}
/* GObject vmethod implementations */
static void
gst_face_blur_base_init (gpointer gclass)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (gclass);
gst_element_class_set_details_simple (element_class,
"faceblur",
"Filter/Effect/Video",
"Blurs faces in images and videos",
"Michael Sheldon <mike@mikeasoft.com>");
gst_element_class_add_static_pad_template (element_class, &src_factory);
gst_element_class_add_static_pad_template (element_class, &sink_factory);
}
/* initialize the faceblur's class */
static void
gst_face_blur_class_init (GstFaceBlurClass * klass)
{
GObjectClass *gobject_class;
gobject_class = (GObjectClass *) klass;
parent_class = g_type_class_peek_parent (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));
}
/* 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, GstFaceBlurClass * gclass)
{
filter->sinkpad = gst_pad_new_from_static_template (&sink_factory, "sink");
gst_pad_set_setcaps_function (filter->sinkpad,
GST_DEBUG_FUNCPTR (gst_face_blur_set_caps));
gst_pad_set_getcaps_function (filter->sinkpad,
GST_DEBUG_FUNCPTR (gst_pad_proxy_getcaps));
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_getcaps_function (filter->srcpad,
GST_DEBUG_FUNCPTR (gst_pad_proxy_getcaps));
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_set_caps (GstPad * pad, GstCaps * caps)
{
GstFaceBlur *filter;
GstPad *otherpad;
gint width, height;
GstStructure *structure;
filter = GST_FACE_BLUR (gst_pad_get_parent (pad));
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);
otherpad = (pad == filter->srcpad) ? filter->sinkpad : filter->srcpad;
gst_object_unref (filter);
return gst_pad_set_caps (otherpad, caps);
}
/* chain function
* this function does the actual processing
*/
static GstFlowReturn
gst_face_blur_chain (GstPad * pad, GstBuffer * buf)
{
GstFaceBlur *filter;
CvSeq *faces;
int i;
filter = GST_FACE_BLUR (GST_OBJECT_PARENT (pad));
filter->cvImage->imageData = (char *) GST_BUFFER_DATA (buf);
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 (32, 32)
#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);
}