2 * filter_luma.c -- luma filter
3 * Copyright (C) 2003-2004 Ushodaya Enterprises Limited
4 * Author: Charles Yates <charles.yates@pandora.be>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software Foundation,
18 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
21 #include "filter_luma.h"
23 #include <framework/mlt_factory.h>
24 #include <framework/mlt_frame.h>
25 #include <framework/mlt_producer.h>
26 #include <framework/mlt_transition.h>
35 static int filter_get_image( mlt_frame
this, uint8_t **image
, mlt_image_format
*format
, int *width
, int *height
, int writable
)
38 mlt_filter filter
= mlt_frame_pop_service( this );
39 mlt_properties properties
= mlt_filter_properties( filter
);
40 mlt_transition luma
= mlt_properties_get_data( properties
, "luma", NULL
);
41 mlt_frame b_frame
= mlt_properties_get_data( properties
, "frame", NULL
);
42 int out
= mlt_properties_get_int( properties
, "period" );
49 char *resource
= mlt_properties_get( properties
, "resource" );
50 luma
= mlt_factory_transition( "luma", resource
);
53 mlt_properties luma_properties
= mlt_transition_properties( luma
);
54 mlt_properties_set_int( luma_properties
, "in", 0 );
55 mlt_properties_set_int( luma_properties
, "out", 24 );
56 mlt_properties_set_int( luma_properties
, "reverse", 1 );
57 mlt_properties_pass( luma_properties
, properties
, "luma." );
58 mlt_properties_set_data( properties
, "luma", luma
, 0, ( mlt_destructor
)mlt_transition_close
, NULL
);
62 if ( b_frame
== NULL
)
64 b_frame
= mlt_frame_init( );
65 mlt_properties_set_data( properties
, "frame", b_frame
, 0, ( mlt_destructor
)mlt_frame_close
, NULL
);
69 ( mlt_properties_get( properties
, "blur" ) != NULL
||
70 mlt_frame_get_position( this ) % ( out
+ 1 ) != out
) )
71 mlt_transition_process( luma
, this, b_frame
);
73 error
= mlt_frame_get_image( this, image
, format
, width
, height
, 1 );
77 mlt_properties a_props
= mlt_frame_properties( this );
79 uint8_t *src
= mlt_properties_get_data( a_props
, "image", &size
);
80 uint8_t *dst
= mlt_pool_alloc( size
);
84 mlt_properties b_props
= mlt_frame_properties( b_frame
);
85 memcpy( dst
, src
, size
);
86 mlt_properties_set_data( b_props
, "image", dst
, size
, mlt_pool_release
, NULL
);
87 mlt_properties_set_int( b_props
, "width", *width
);
88 mlt_properties_set_int( b_props
, "height", *height
);
95 /** Filter processing.
98 static mlt_frame
filter_process( mlt_filter
this, mlt_frame frame
)
100 // Push the filter on to the stack
101 mlt_frame_push_service( frame
, this );
103 // Push the get_image on to the stack
104 mlt_frame_push_get_image( frame
, filter_get_image
);
109 /** Constructor for the filter.
112 mlt_filter
filter_luma_init( void *arg
)
114 mlt_filter
this = mlt_filter_new( );
117 mlt_properties properties
= mlt_filter_properties( this );
118 this->process
= filter_process
;
120 mlt_properties_set( properties
, "resource", arg
);