2 * filter_autotrack_rectangle.c
5 * /author Zachary Drew, Copyright 2005
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software Foundation,
20 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
23 #include "filter_motion_est.h"
24 #include "arrow_code.h"
26 #include <framework/mlt.h>
33 #define MIN(a,b) ((a) > (b) ? (b) : (a))
35 #define ROUNDED_DIV(a,b) (((a)>0 ? (a) + ((b)>>1) : (a) - ((b)>>1))/(b))
36 #define ABS(a) ((a) >= 0 ? (a) : (-(a)))
38 void caculate_motion( struct motion_vector_s
*vectors
,
39 mlt_geometry_item boundry
,
41 int macroblock_height
,
47 // translate pixel units (from bounds) to macroblock units
48 // make sure whole macroblock stay within bounds
49 int left_mb
= ( boundry
->x
+ macroblock_width
- 1 ) / macroblock_width
;
50 int top_mb
= ( boundry
->y
+ macroblock_height
- 1 ) / macroblock_height
;
51 int right_mb
= ( boundry
->x
+ boundry
->w
) / macroblock_width
- 1;
52 int bottom_mb
= ( boundry
->y
+ boundry
->h
) / macroblock_height
- 1;
56 int average_x
= 0, average_y
= 0;
58 #define CURRENT ( vectors + j*mv_buffer_width + i )
60 for( i
= left_mb
; i
<= right_mb
; i
++ ){
61 for( j
= top_mb
; j
<= bottom_mb
; j
++ )
64 average_x
+= CURRENT
->dx
;
65 average_y
+= CURRENT
->dy
;
75 int average2_x
= 0, average2_y
= 0;
76 for( i
= left_mb
; i
<= right_mb
; i
++ ){
77 for( j
= top_mb
; j
<= bottom_mb
; j
++ ){
79 if( ABS(CURRENT
->dx
- average_x
) < 3 &&
80 ABS(CURRENT
->dy
- average_y
) < 3 )
83 average2_x
+= CURRENT
->dx
;
84 average2_y
+= CURRENT
->dy
;
91 boundry
->x
-= (double)average2_x
/ (double)n
;
92 boundry
->y
-= (double)average2_y
/ (double)n
;
95 // Image stack(able) method
96 static int filter_get_image( mlt_frame frame
, uint8_t **image
, mlt_image_format
*format
, int *width
, int *height
, int writable
)
99 // Get the filter object
100 mlt_filter filter
= mlt_frame_pop_service( frame
);
102 // Get the filter's property object
103 mlt_properties filter_properties
= MLT_FILTER_PROPERTIES(filter
);
105 // Get the frame properties
106 mlt_properties frame_properties
= MLT_FRAME_PROPERTIES(frame
);
108 // Get the frame position
109 mlt_position position
= mlt_frame_get_position( frame
);
112 int error
= mlt_frame_get_image( frame
, image
, format
, width
, height
, 1 );
115 mlt_properties_debug( frame_properties
, "error after mlt_frame_get_image() in autotrack_rectangle", stderr
);
117 // Get the geometry object
118 mlt_geometry geometry
= mlt_properties_get_data(filter_properties
, "geometry", NULL
);
120 // Get the current geometry item
121 struct mlt_geometry_item_s boundry
;
122 mlt_geometry_fetch(geometry
, &boundry
, position
);
124 // Get the motion vectors
125 struct motion_vector_s
*vectors
= mlt_properties_get_data( frame_properties
, "motion_est.vectors", NULL
);
127 // How did the rectangle move?
128 if( vectors
!= NULL
&&
129 boundry
.key
!= 1 ) // Paused?
132 int method
= mlt_properties_get_int( filter_properties
, "method" );
134 // Get the size of macroblocks in pixel units
135 int macroblock_height
= mlt_properties_get_int( frame_properties
, "motion_est.macroblock_height" );
136 int macroblock_width
= mlt_properties_get_int( frame_properties
, "motion_est.macroblock_width" );
137 int mv_buffer_width
= *width
/ macroblock_width
;
139 caculate_motion( vectors
, &boundry
, macroblock_width
, macroblock_height
, mv_buffer_width
, method
);
142 // Make the geometry object a real boy
149 mlt_geometry_insert(geometry
, &boundry
);
152 if( mlt_properties_get_int( filter_properties
, "debug" ) == 1 )
154 init_arrows( format
, *width
, *height
);
155 draw_rectangle_outline(*image
, boundry
.x
, boundry
.y
, boundry
.w
, boundry
.h
, 100);
158 if( mlt_properties_get_int( filter_properties
, "obscure" ) == 1 )
160 mlt_filter obscure
= mlt_properties_get_data( filter_properties
, "_obscure", NULL
);
162 mlt_properties_pass_list( MLT_FILTER_PROPERTIES(obscure
), filter_properties
, "in, out");
164 // Because filter_obscure needs to be rewritten to use mlt_geometry
166 sprintf( geom
, "%d,%d:%dx%d", (int)boundry
.x
, (int)boundry
.y
, (int)boundry
.w
, (int)boundry
.h
);
167 mlt_properties_set( MLT_FILTER_PROPERTIES( obscure
), "start", geom
);
168 mlt_properties_set( MLT_FILTER_PROPERTIES( obscure
), "end", geom
);
175 static int attach_boundry_to_frame( mlt_frame frame
, uint8_t **image
, mlt_image_format
*format
, int *width
, int *height
, int writable
)
177 // Get the filter object
178 mlt_filter filter
= mlt_frame_pop_service( frame
);
180 // Get the filter's property object
181 mlt_properties filter_properties
= MLT_FILTER_PROPERTIES(filter
);
183 // Get the frame properties
184 mlt_properties frame_properties
= MLT_FRAME_PROPERTIES(frame
);
186 // Get the frame position
187 mlt_position position
= mlt_frame_get_position( frame
);
189 // Get the geometry object
190 mlt_geometry geometry
= mlt_properties_get_data(filter_properties
, "geometry", NULL
);
192 // Get the current geometry item
193 mlt_geometry_item geometry_item
= mlt_pool_alloc( sizeof( struct mlt_geometry_item_s
) );
194 mlt_geometry_fetch(geometry
, geometry_item
, position
);
196 mlt_properties_set_data( frame_properties
, "bounds", geometry_item
, sizeof( struct mlt_geometry_item_s
), mlt_pool_release
, NULL
);
199 int error
= mlt_frame_get_image( frame
, image
, format
, width
, height
, 1 );
202 mlt_properties_debug( frame_properties
, "error after mlt_frame_get_image() in autotrack_rectangle attach_boundry_to_frame", stderr
);
207 /** Filter processing.
210 static mlt_frame
filter_process( mlt_filter
this, mlt_frame frame
)
213 /* modify the frame with the current geometry */
214 mlt_frame_push_service( frame
, this);
215 mlt_frame_push_get_image( frame
, attach_boundry_to_frame
);
219 /* apply the motion estimation filter */
220 mlt_filter motion_est
= mlt_properties_get_data( MLT_FILTER_PROPERTIES(this), "_motion_est", NULL
);
221 mlt_filter_process( motion_est
, frame
);
225 /* calculate the new geometry based on the motion */
226 mlt_frame_push_service( frame
, this);
227 mlt_frame_push_get_image( frame
, filter_get_image
);
230 /* visualize the motion vectors */
231 if( mlt_properties_get_int( MLT_FILTER_PROPERTIES(this), "debug" ) == 1 )
233 mlt_filter vismv
= mlt_properties_get_data( MLT_FILTER_PROPERTIES(this), "_vismv", NULL
);
236 vismv
= mlt_factory_filter( "vismv", NULL
);
237 mlt_properties_set_data( MLT_FILTER_PROPERTIES(this), "_vismv", vismv
, 0, (mlt_destructor
)mlt_filter_close
, NULL
);
240 mlt_filter_process( vismv
, frame
);
243 if( mlt_properties_get_int( MLT_FILTER_PROPERTIES(this), "obscure" ) == 1 )
245 mlt_filter obscure
= mlt_properties_get_data( MLT_FILTER_PROPERTIES(this), "_obscure", NULL
);
246 if( obscure
== NULL
)
248 obscure
= mlt_factory_filter( "obscure", NULL
);
249 mlt_properties_set_data( MLT_FILTER_PROPERTIES(this), "_obscure", obscure
, 0, (mlt_destructor
)mlt_filter_close
, NULL
);
252 mlt_filter_process( obscure
, frame
);
258 /** Constructor for the filter.
262 mlt_filter
filter_autotrack_rectangle_init( char *arg
)
264 mlt_filter
this = mlt_filter_new( );
267 this->process
= filter_process
;
270 mlt_geometry geometry
= mlt_geometry_init();
272 // Initialize with the supplied geometry
275 struct mlt_geometry_item_s item
;
277 mlt_geometry_parse_item( geometry
, &item
, arg
);
283 mlt_geometry_insert( geometry
, &item
);
287 // ... and attach it to the filter
288 mlt_properties_set_data( MLT_FILTER_PROPERTIES(this), "geometry", geometry
, 0, (mlt_destructor
)mlt_geometry_close
, (mlt_serialiser
)mlt_geometry_serialise
);
290 // create an instance of the motion_est and obscure filter
291 mlt_filter motion_est
= mlt_factory_filter( "motion_est", NULL
);
292 if( motion_est
!= NULL
)
293 mlt_properties_set_data( MLT_FILTER_PROPERTIES(this), "_motion_est", motion_est
, 0, (mlt_destructor
)mlt_filter_close
, NULL
);
295 mlt_filter_close( this );
305 /** This source code will self destruct in 5...4...3...