* (performs face identification). Mostly taken from the facedetect.c
* OpenCV sample.
*****************************************************************************
- * Copyright (C) 2006 the VideoLAN team
+ * Copyright (C) 2006-2012 the VideoLAN team
+ * Copyright (C) 2012 Edward Wang
*
* Authors: Dugal Harris <dugalh@protoclea.co.za>
+ * Edward Wang <edward.c.wang@compdigitec.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
/*****************************************************************************
* Preamble
*****************************************************************************/
-#include <cxcore.h>
-#include <cv.h>
-#include <highgui.h>
-
#ifdef HAVE_CONFIG_H
# include "config.h"
#include <vlc_common.h>
#include <vlc_plugin.h>
#include <vlc_filter.h>
-#include "filter_common.h"
+#include <vlc_vout.h>
#include <vlc_image.h>
#include "filter_event_info.h"
+#include <opencv2/core/core_c.h>
+#include <opencv2/core/core.hpp>
+#include <opencv2/objdetect/objdetect.hpp>
+
/*****************************************************************************
* filter_sys_t : filter descriptor
*****************************************************************************/
/*****************************************************************************
* Module descriptor
*****************************************************************************/
-vlc_module_begin();
- set_description( N_("OpenCV face detection example filter") );
- set_shortname( N_( "OpenCV example" ));
- set_capability( "opencv example", 1 );
- add_shortcut( "opencv_example" );
+vlc_module_begin ()
+ set_description( N_("OpenCV face detection example filter") )
+ set_shortname( N_( "OpenCV example" ))
+ set_capability( "opencv internal filter", 1 )
+ add_shortcut( "opencv_example" )
- set_category( CAT_VIDEO );
- set_subcategory( SUBCAT_VIDEO_VFILTER2 );
- set_callbacks( OpenFilter, CloseFilter );
+ set_category( CAT_VIDEO )
+ set_subcategory( SUBCAT_VIDEO_VFILTER )
+ set_callbacks( OpenFilter, CloseFilter )
- add_string( "opencv-haarcascade-file", "c:\\haarcascade_frontalface_alt.xml", NULL,
+ add_string( "opencv-haarcascade-file", "c:\\haarcascade_frontalface_alt.xml",
N_("Haar cascade filename"),
N_("Name of XML file containing Haar cascade description"), false);
-vlc_module_end();
+vlc_module_end ()
/*****************************************************************************
* OpenFilter: probe the filter and return score
if( ( p_filter->p_sys = p_sys =
(filter_sys_t *)malloc(sizeof(filter_sys_t)) ) == NULL )
{
- msg_Err( p_filter, "out of memory" );
- return VLC_EGENERIC;
+ return VLC_ENOMEM;
}
//init the video_filter_event_info_t struct
//create the VIDEO_FILTER_EVENT_VARIABLE
vlc_value_t val;
if (var_Create( p_filter->p_libvlc, VIDEO_FILTER_EVENT_VARIABLE, VLC_VAR_ADDRESS | VLC_VAR_DOINHERIT ) != VLC_SUCCESS)
- msg_Err( p_filter, "Could not create %s\n", VIDEO_FILTER_EVENT_VARIABLE);
+ msg_Err( p_filter, "Could not create %s", VIDEO_FILTER_EVENT_VARIABLE);
val.p_address = &(p_sys->event_info);
if (var_Set( p_filter->p_libvlc, VIDEO_FILTER_EVENT_VARIABLE, val )!=VLC_SUCCESS)
- msg_Err( p_filter, "Could not set %s\n", VIDEO_FILTER_EVENT_VARIABLE);
+ msg_Err( p_filter, "Could not set %s", VIDEO_FILTER_EVENT_VARIABLE);
//OpenCV init specific to this example
- char* filename = config_GetPsz( p_filter, "opencv-haarcascade-file" );
- p_filter->p_sys->p_cascade = (CvHaarClassifierCascade*)cvLoad( filename, 0, 0, 0 );
- p_filter->p_sys->p_storage = cvCreateMemStorage(0);
+ char* filename = var_InheritString( p_filter, "opencv-haarcascade-file" );
+ p_sys->p_cascade = (CvHaarClassifierCascade*)cvLoad( filename, 0, 0, 0 );
+ p_sys->p_storage = cvCreateMemStorage(0);
+ free( filename );
return VLC_SUCCESS;
}
filter_t *p_filter = (filter_t*)p_this;
filter_sys_t *p_sys = p_filter->p_sys;
- if( p_filter->p_sys->p_cascade )
- cvReleaseHaarClassifierCascade( &p_filter->p_sys->p_cascade );
+ if( p_sys->p_cascade )
+ cvReleaseHaarClassifierCascade( &p_sys->p_cascade );
- if( p_filter->p_sys->p_storage )
- cvReleaseMemStorage( &p_filter->p_sys->p_storage );
-
- if (NULL != p_filter->p_sys->event_info.p_region)
- free(p_filter->p_sys->event_info.p_region);
+ if( p_sys->p_storage )
+ cvReleaseMemStorage( &p_sys->p_storage );
+ free( p_sys->event_info.p_region );
free( p_sys );
var_Destroy( p_filter->p_libvlc, VIDEO_FILTER_EVENT_VARIABLE);
/****************************************************************************
* Filter: Check for faces and raises an event when one is found.
- ****************************************************************************
- * p_pic: A picture_t with its p_data_orig member set to an array of
- * IplImages (one image for each picture_t plane).
****************************************************************************/
static picture_t *Filter( filter_t *p_filter, picture_t *p_pic )
{
IplImage** p_img = NULL;
- int i_planes = 0;
CvPoint pt1, pt2;
int i, scale = 1;
+ filter_sys_t *p_sys = p_filter->p_sys;
if ((!p_pic) )
{
msg_Err( p_filter, "no image array" );
return NULL;
}
- if (!(p_pic->p_data_orig))
- {
- msg_Err( p_filter, "no image array" );
- return NULL;
- }
//(hack) cast the picture_t to array of IplImage*
- p_img = (IplImage**) p_pic->p_data_orig;
- i_planes = p_pic->i_planes;
+ p_img = (IplImage**) p_pic;
//check the image array for validity
if ((!p_img[0])) //1st plane is 'I' i.e. greyscale
msg_Err( p_filter, "no image" );
return NULL;
}
- if ((p_pic->format.i_chroma != VLC_FOURCC('I','4','2','0')))
- {
- msg_Err( p_filter, "wrong chroma - use I420" );
- return NULL;
- }
- if (i_planes<1)
- {
- msg_Err( p_filter, "no image planes" );
- return NULL;
- }
//perform face detection
- cvClearMemStorage(p_filter->p_sys->p_storage);
- CvSeq* faces = NULL;
- if( p_filter->p_sys->p_cascade )
+ cvClearMemStorage(p_sys->p_storage);
+ if( p_sys->p_cascade )
{
//we should make some of these params config variables
- faces = cvHaarDetectObjects( p_img[0], p_filter->p_sys->p_cascade,
- p_filter->p_sys->p_storage, 1.15, 5, CV_HAAR_DO_CANNY_PRUNING,
+ CvSeq *faces = cvHaarDetectObjects( p_img[0], p_sys->p_cascade,
+ p_sys->p_storage, 1.15, 5,
+ CV_HAAR_DO_CANNY_PRUNING,
cvSize(20, 20) );
//create the video_filter_region_info_t struct
- CvRect* r;
if (faces && (faces->total > 0))
{
- //msg_Dbg( p_filter, "Found %d face(s)\n", faces->total );
- if (NULL != p_filter->p_sys->event_info.p_region)
- {
- free(p_filter->p_sys->event_info.p_region);
- p_filter->p_sys->event_info.p_region = NULL;
- }
- if( NULL == ( p_filter->p_sys->event_info.p_region =
- (video_filter_region_info_t *)malloc(faces->total*sizeof(video_filter_region_info_t))))
- {
- msg_Err( p_filter, "out of memory" );
+ //msg_Dbg( p_filter, "Found %d face(s)", faces->total );
+ free( p_sys->event_info.p_region );
+ p_sys->event_info.p_region = (video_filter_region_info_t*)
+ calloc( faces->total, sizeof(video_filter_region_info_t));
+ if( !p_sys->event_info.p_region )
return NULL;
- }
- memset(p_filter->p_sys->event_info.p_region, 0, faces->total*sizeof(video_filter_region_info_t));
- p_filter->p_sys->event_info.i_region_size = faces->total;
+ p_sys->event_info.i_region_size = faces->total;
}
//populate the video_filter_region_info_t struct
for( i = 0; i < (faces ? faces->total : 0); i++ )
{
- r = (CvRect*)cvGetSeqElem( faces, i );
+ CvRect *r = (CvRect*)cvGetSeqElem( faces, i );
pt1.x = r->x*scale;
pt2.x = (r->x+r->width)*scale;
pt1.y = r->y*scale;
pt2.y = (r->y+r->height)*scale;
cvRectangle( p_img[0], pt1, pt2, CV_RGB(0,0,0), 3, 8, 0 );
- *(CvRect*)(&(p_filter->p_sys->event_info.p_region[i])) = *r;
- p_filter->p_sys->event_info.p_region[i].i_id = p_filter->p_sys->i_id++;
- p_filter->p_sys->event_info.p_region[i].p_description = "Face Detected";
+ *(CvRect*)(&(p_sys->event_info.p_region[i])) = *r;
+ p_sys->event_info.p_region[i].i_id = p_sys->i_id++;
+ p_sys->event_info.p_region[i].p_description = "Face Detected";
}
if (faces && (faces->total > 0)) //raise the video filter event
- var_Change( p_filter->p_libvlc, VIDEO_FILTER_EVENT_VARIABLE, VLC_VAR_TRIGGER_CALLBACKS, NULL, NULL );
+ var_TriggerCallback( p_filter->p_libvlc, VIDEO_FILTER_EVENT_VARIABLE );
}
else
msg_Err( p_filter, "No cascade - is opencv-haarcascade-file valid?" );
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