2 * /brief Draw motion vectors
3 * /author Zachary Drew, Copyright 2004
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software Foundation,
17 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
20 #include "filter_motion_est.h"
21 #include "arrow_code.h"
23 #include <framework/mlt_frame.h>
30 #define ABS(a) ((a) >= 0 ? (a) : (-(a)))
32 static void paint_arrows( uint8_t *image, struct motion_vector_s *vectors, int w, int h, int mb_w, int mb_h )
35 struct motion_vector_s *p;
36 for( i = 0; i < w/mb_w; i++ ){
37 for( j = 0; j < h/mb_h; j++ ){
40 p = vectors + (w/mb_w)*j + i;
42 if ( p->valid == 1 ) {
43 //draw_rectangle_outline(image, x-1, y-1, mb_w+1, mb_h+1,100);
46 //draw_rectangle_outline(image, x + p->dx, y + p->dy, mb_w, mb_h,100);
49 draw_arrow(image, x, y, x + p->dx, y + p->dy, 100);
50 //draw_rectangle_fill(image, x + p->dx, y + p->dy, mb_w, mb_h, 100);
52 else if ( p->valid == 2 ) {
53 draw_rectangle_outline(image, x+1, y+1, mb_w-2, mb_h-2,100);
55 else if ( p->valid == 3 ) {
56 draw_rectangle_fill(image, x-p->dx, y-p->dy, mb_w, mb_h,0);
58 else if ( p->valid == 4 ) {
59 draw_line(image, x, y, x + 4, y, 100);
60 draw_line(image, x, y, x, y + 4, 100);
61 draw_line(image, x + 4, y, x, y + 4, 100);
63 draw_line(image, x+mb_w-1, y+mb_h-1, x+mb_w-5, y+mb_h-1, 100);
64 draw_line(image, x+mb_w-1, y+mb_h-1, x+mb_w-1, y+mb_h-5, 100);
65 draw_line(image, x+mb_w-5, y+mb_h-1, x+mb_w-1, y+mb_h-5, 100);
71 // Image stack(able) method
72 static int filter_get_image( mlt_frame frame, uint8_t **image, mlt_image_format *format, int *width, int *height, int writable )
74 // Get the frame properties
75 mlt_properties properties = MLT_FRAME_PROPERTIES(frame);
78 int error = mlt_frame_get_image( frame, image, format, width, height, 1 );
81 mlt_properties_debug( MLT_FRAME_PROPERTIES(frame), "error after mlt_frame_get_image()", stderr );
84 // Get the size of macroblocks in pixel units
85 int macroblock_height = mlt_properties_get_int( properties, "motion_est.macroblock_height" );
86 int macroblock_width = mlt_properties_get_int( properties, "motion_est.macroblock_width" );
88 // Get the motion vectors
89 struct motion_vector_s *current_vectors = mlt_properties_get_data( properties, "motion_est.vectors", NULL );
91 init_arrows( format, *width, *height );
93 if ( mlt_properties_get_int( properties, "shot_change" ) == 1 )
95 draw_line(*image, 0, 0, *width, *height, 100);
96 draw_line(*image, 0, *height, *width, 0, 100);
98 if( current_vectors != NULL ) {
99 paint_arrows( *image, current_vectors, *width, *height, macroblock_width, macroblock_height);
107 /** Filter processing.
110 static mlt_frame filter_process( mlt_filter this, mlt_frame frame )
112 // Push the frame filter
113 mlt_frame_push_get_image( frame, filter_get_image );
119 /** Constructor for the filter.
123 mlt_filter filter_vismv_init( mlt_profile profile, mlt_service_type type, const char *id, char *arg )
125 mlt_filter this = mlt_filter_new( );
128 this->process = filter_process;
135 /** This source code will self destruct in 5...4...3...