file.c

/*
 * GStreamer
 * Copyright (C) 2018 Fabian Orccon <cfoch.fabian@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., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */

/**
 * SECTION:element-cheesefacedetect
 *
 * FIXME:Describe cheesefacedetect here.
 *
 * <refsect2>
 * <title>Example launch line</title>
 * |[
 * gst-launch -v -m fakesrc ! cheesefacedetect ! fakesink silent=TRUE
 * ]|
 * </refsect2>
 */

#ifdef HAVE_CONFIG_H
#  include <config.h>
#endif

#include <gst/gst.h>
#include <cstdio>
#include <iostream>
#include <vector>

#include "gstcheesefacedetect.h"

using namespace std;
using namespace dlib;

GST_DEBUG_CATEGORY_STATIC (gst_cheese_face_detect_debug);
#define GST_CAT_DEFAULT gst_cheese_face_detect_debug

/* Filter signals and args */
enum
{
  /* FILL ME */
  LAST_SIGNAL
};

enum
{
  PROP_0,
  PROP_SILENT
};

/* the capabilities of the inputs and outputs.
 *
 * describe the real formats here.
 */
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"))
    );

#define gst_cheese_face_detect_parent_class parent_class
G_DEFINE_TYPE (GstCheeseFaceDetect, gst_cheese_face_detect, GST_TYPE_OPENCV_VIDEO_FILTER);

static void gst_cheese_face_detect_finalize (GObject * obj);
static void gst_cheese_face_detect_set_property (GObject * object, guint prop_id,
    const GValue * value, GParamSpec * pspec);
static void gst_cheese_face_detect_get_property (GObject * object, guint prop_id,
    GValue * value, GParamSpec * pspec);

static gboolean gst_cheese_face_detect_sink_event (GstPad * pad, GstObject * parent, GstEvent * event);
static GstFlowReturn gst_cheese_face_detect_chain (GstPad * pad, GstObject * parent, GstBuffer * buf);

static GstFlowReturn gst_cheese_face_detect_transform_ip (GstOpencvVideoFilter * filter,
    GstBuffer * buf, IplImage * img);

/* GObject vmethod implementations */

/* initialize the cheesefacedetect's class */
static void
gst_cheese_face_detect_class_init (GstCheeseFaceDetectClass * klass)
{
  GObjectClass *gobject_class;
  GstElementClass *gstelement_class;
  GstOpencvVideoFilterClass *gstopencvbasefilter_class;

  gobject_class = (GObjectClass *) klass;
  gstelement_class = (GstElementClass *) klass;
  gstopencvbasefilter_class = (GstOpencvVideoFilterClass *) klass;

  gstopencvbasefilter_class->cv_trans_ip_func =
      gst_cheese_face_detect_transform_ip;

  gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_cheese_face_detect_finalize);
  gobject_class->set_property = gst_cheese_face_detect_set_property;
  gobject_class->get_property = gst_cheese_face_detect_get_property;

  g_object_class_install_property (gobject_class, PROP_SILENT,
      g_param_spec_boolean ("silent", "Silent", "Produce verbose output ?",
          FALSE, G_PARAM_READWRITE));

  gst_element_class_set_details_simple(gstelement_class,
    "CheeseFaceDetect",
    "FIXME:Generic",
    "FIXME:Generic Template Element",
    "Fabian Orccon <<user@hostname.org>>");

  gst_element_class_add_pad_template (gstelement_class,
      gst_static_pad_template_get (&src_factory));
  gst_element_class_add_pad_template (gstelement_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_cheese_face_detect_init (GstCheeseFaceDetect * filter)
{
/*
  filter->sinkpad = gst_pad_new_from_static_template (&sink_factory, "sink");
  gst_pad_set_event_function (filter->sinkpad,
                              GST_DEBUG_FUNCPTR(gst_cheese_face_detect_sink_event));
  gst_pad_set_chain_function (filter->sinkpad,
                              GST_DEBUG_FUNCPTR(gst_cheese_face_detect_chain));
  GST_PAD_SET_PROXY_CAPS (filter->sinkpad);
  gst_element_add_pad (GST_ELEMENT (filter), filter->sinkpad);

  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->srcpad);

  filter->silent = FALSE;
*/
  frontal_face_detector detector = get_frontal_face_detector();
  filter->face_detector = &detector;

  gst_opencv_video_filter_set_in_place (GST_OPENCV_VIDEO_FILTER_CAST (filter),
      TRUE);
}

static void
gst_cheese_face_detect_set_property (GObject * object, guint prop_id,
    const GValue * value, GParamSpec * pspec)
{
  GstCheeseFaceDetect *filter = GST_CHEESEFACEDETECT (object);

  switch (prop_id) {
    /*case PROP_SILENT:
      filter->silent = g_value_get_boolean (value);
      break;*/
    default:
      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
      break;
  }
}

static void
gst_cheese_face_detect_get_property (GObject * object, guint prop_id,
    GValue * value, GParamSpec * pspec)
{
  GstCheeseFaceDetect *filter = GST_CHEESEFACEDETECT (object);

  switch (prop_id) {
    /*case PROP_SILENT:
      g_value_set_boolean (value, filter->silent);
      break;*/
    default:
      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
      break;
  }
}

/* chain function
 * this function does the actual processing
 */
static GstFlowReturn
gst_cheese_face_detect_transform_ip (GstOpencvVideoFilter * base,
    GstBuffer * buf, IplImage * img)
{
  int i;
  GstCheeseFaceDetect *filter = GST_CHEESEFACEDETECT (base);
  cv_image<bgr_pixel> dlib_img (img);

  dlib::frontal_face_detector detector = *(filter->face_detector);

  std::vector<rectangle> dets = detector (dlib_img);

  for (i = 0; i < dets.size(); i++) {
    cout << "face number " << i + 1 << endl;
  }

  return GST_FLOW_OK;
}

/* GstElement vmethod implementations */

/* this function handles sink events */
static gboolean
gst_cheese_face_detect_sink_event (GstPad * pad, GstObject * parent, GstEvent * event)
{
  GstCheeseFaceDetect *filter;
  gboolean ret;

  filter = GST_CHEESEFACEDETECT (parent);

  GST_LOG_OBJECT (filter, "Received %s event: %" GST_PTR_FORMAT,
      GST_EVENT_TYPE_NAME (event), event);

  switch (GST_EVENT_TYPE (event)) {
    case GST_EVENT_CAPS:
    {
      GstCaps * caps;

      gst_event_parse_caps (event, &caps);
      /* do something with the caps */

      /* and forward */
      ret = gst_pad_event_default (pad, parent, event);
      break;
    }
    default:
      ret = gst_pad_event_default (pad, parent, event);
      break;
  }
  return ret;
}

static void
gst_cheese_face_detect_finalize (GObject * obj)
{
  GstCheeseFaceDetect *filter = GST_CHEESEFACEDETECT (obj);

  if (filter->face_detector)
    delete (filter->face_detector);

  G_OBJECT_CLASS (gst_cheese_face_detect_parent_class)->finalize (obj);
}

file.h

/*
 * GStreamer
 * Copyright (C) 2018 Fabian Orccon <cfoch.fabian@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., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */

#ifndef __GST_CHEESEFACEDETECT_H__
#define __GST_CHEESEFACEDETECT_H__

#include <gst/gst.h>
#include <gst/opencv/gstopencvvideofilter.h>

#include <opencv2/core/core_c.h>
#if (CV_MAJOR_VERSION >= 3)
#include <opencv2/imgproc/imgproc_c.h>
#endif

#include <dlib/image_processing/frontal_face_detector.h>
#include <dlib/image_io.h>
#include <dlib/gui_widgets.h>
#include <dlib/opencv.h>

G_BEGIN_DECLS

/* #defines don't like whitespacey bits */
#define GST_TYPE_CHEESEFACEDETECT \
  (gst_cheese_face_detect_get_type())
#define GST_CHEESEFACEDETECT(obj) \
  (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_CHEESEFACEDETECT,GstCheeseFaceDetect))
#define GST_CHEESEFACEDETECT_CLASS(klass) \
  (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_CHEESEFACEDETECT,GstCheeseFaceDetectClass))
#define GST_IS_CHEESEFACEDETECT(obj) \
  (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_CHEESEFACEDETECT))
#define GST_IS_CHEESEFACEDETECT_CLASS(klass) \
  (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_CHEESEFACEDETECT))

typedef struct _GstCheeseFaceDetect      GstCheeseFaceDetect;
typedef struct _GstCheeseFaceDetectClass GstCheeseFaceDetectClass;

struct _GstCheeseFaceDetect
{
  GstOpencvVideoFilter element;
  dlib::frontal_face_detector *face_detector;

  //GstPad *sinkpad, *srcpad;

  //gboolean silent;
};

struct _GstCheeseFaceDetectClass 
{
  GstOpencvVideoFilterClass parent_class;
};

GType gst_cheese_face_detect_get_type (void);

G_END_DECLS

#endif /* __GST_CHEESEFACEDETECT_H__ */