Remove most nested headers from <vlc_filter.h>
[vlc.git] / modules / video_filter / opencv_example.cpp
index 8a5b170..a7a0bd7 100644 (file)
@@ -3,44 +3,49 @@
  * (performs face identification).  Mostly taken from the facedetect.c
  * OpenCV sample.
  *****************************************************************************
- * Copyright (C) 2006 the VideoLAN team
+ * Copyright (C) 2006-2012 VLC authors and VideoLAN
+ * 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
- * the Free Software Foundation; either version 2 of the License, or
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation; either version 2.1 of the License, or
  * (at your option) any later version.
  *
  * This program 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 General Public License for more details.
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Lesser General Public License for more details.
  *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  *****************************************************************************/
 
 /*****************************************************************************
  * Preamble
  *****************************************************************************/
-#include <cxcore.h>
-#include <cv.h>
-#include <highgui.h>
-
 
 #ifdef HAVE_CONFIG_H
 # include "config.h"
 #endif
 
-#include <vlc/vlc.h>
-#include <vlc_decoder.h>
+#include <vlc_common.h>
+#include <vlc_plugin.h>
 #include <vlc_filter.h>
-#include "filter_common.h"
+#include <vlc_picture.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/imgproc/imgproc_c.h>
+#include <opencv2/imgproc/imgproc.hpp>
+#include <opencv2/objdetect/objdetect.hpp>
+
 /*****************************************************************************
  * filter_sys_t : filter descriptor
  *****************************************************************************/
@@ -63,20 +68,20 @@ static picture_t *Filter( filter_t *, picture_t * );
 /*****************************************************************************
  * Module descriptor
  *****************************************************************************/
-vlc_module_begin();
-    set_description( _("OpenCV face detection example filter") );
-    set_shortname( _( "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"), VLC_FALSE);
-vlc_module_end();
+                          N_("Name of XML file containing Haar cascade description"), false);
+vlc_module_end ()
 
 /*****************************************************************************
  * OpenFilter: probe the filter and return score
@@ -90,8 +95,7 @@ static int OpenFilter( vlc_object_t *p_this )
     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
@@ -103,17 +107,18 @@ static int OpenFilter( vlc_object_t *p_this )
 
     //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);
+    if (var_Create( p_filter->obj.libvlc, VIDEO_FILTER_EVENT_VARIABLE, VLC_VAR_ADDRESS | VLC_VAR_DOINHERIT ) != VLC_SUCCESS)
+        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);
+    if (var_Set( p_filter->obj.libvlc, VIDEO_FILTER_EVENT_VARIABLE, val )!=VLC_SUCCESS)
+        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;
 }
@@ -126,46 +131,35 @@ static void CloseFilter( vlc_object_t *p_this )
     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);
+    var_Destroy( p_filter->obj.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;
+    int 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
@@ -173,63 +167,45 @@ static picture_t *Filter( filter_t *p_filter, picture_t *p_pic )
         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++ )
+        for( int 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->obj.libvlc, VIDEO_FILTER_EVENT_VARIABLE );
     }
     else
         msg_Err( p_filter, "No cascade - is opencv-haarcascade-file valid?" );