2 * filter_affine.c -- affine 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_affine.h"
23 #include <framework/mlt.h>
32 static int filter_get_image( mlt_frame
this, uint8_t **image
, mlt_image_format
*format
, int *width
, int *height
, int writable
)
35 mlt_filter filter
= mlt_frame_pop_service( this );
38 mlt_properties properties
= mlt_filter_properties( filter
);
41 int error
= mlt_frame_get_image( this, image
, format
, width
, height
, 0 );
43 // Only process if we have no error and a valid colour space
44 if ( error
== 0 && *format
== mlt_image_yuv422
)
46 mlt_producer producer
= mlt_properties_get_data( properties
, "producer", NULL
);
47 mlt_transition transition
= mlt_properties_get_data( properties
, "transition", NULL
);
48 mlt_frame a_frame
= NULL
;
50 if ( producer
== NULL
)
52 char *background
= mlt_properties_get( properties
, "background" );
53 producer
= mlt_factory_producer( "fezzik", background
);
54 mlt_properties_set_data( properties
, "producer", producer
, 0, (mlt_destructor
)mlt_producer_close
, NULL
);
57 if ( transition
== NULL
)
59 transition
= mlt_factory_transition( "affine", NULL
);
60 mlt_properties_set_data( properties
, "transition", transition
, 0, (mlt_destructor
)mlt_transition_close
, NULL
);
63 if ( producer
!= NULL
&& transition
!= NULL
)
65 char *name
= mlt_properties_get( properties
, "_unique_id" );
66 mlt_position position
= mlt_properties_get_position( mlt_frame_properties( this ), name
);
67 mlt_properties frame_properties
= mlt_frame_properties( this );
68 mlt_producer_seek( producer
, position
);
69 mlt_frame_set_position( this, position
);
70 mlt_properties_pass( mlt_producer_properties( producer
), properties
, "producer." );
71 mlt_properties_pass( mlt_transition_properties( transition
), properties
, "transition." );
72 mlt_service_get_frame( mlt_producer_service( producer
), &a_frame
, 0 );
73 mlt_properties_set( mlt_frame_properties( a_frame
), "rescale_interp", "nearest" );
74 mlt_properties_set( mlt_frame_properties( a_frame
), "distort", "true" );
75 mlt_properties_set_double( mlt_frame_properties( a_frame
), "consumer_aspect_ratio",
76 mlt_properties_get_double( frame_properties
, "consumer_aspect_ratio" ) );
77 mlt_transition_process( transition
, a_frame
, this );
78 mlt_frame_get_image( a_frame
, image
, format
, width
, height
, writable
);
79 mlt_properties_set_data( frame_properties
, "affine_frame", a_frame
, 0, (mlt_destructor
)mlt_frame_close
, NULL
);
80 mlt_properties_set_data( frame_properties
, "image", *image
, *width
* *height
* 2, NULL
, NULL
);
87 /** Filter processing.
90 static mlt_frame
filter_process( mlt_filter
this, mlt_frame frame
)
92 // Get the properties of the frame
93 mlt_properties properties
= mlt_frame_properties( frame
);
95 // Get a unique name to store the frame position
96 char *name
= mlt_properties_get( mlt_filter_properties( this ), "_unique_id" );
98 // Assign the current position to the name
99 mlt_properties_set_position( properties
, name
, mlt_frame_get_position( frame
) );
101 // Push the frame filter
102 mlt_frame_push_service( frame
, this );
103 mlt_frame_push_get_image( frame
, filter_get_image
);
107 /** Constructor for the filter.
110 mlt_filter
filter_affine_init( char *arg
)
112 mlt_filter
this = mlt_filter_new( );
115 this->process
= filter_process
;
116 mlt_properties_set( mlt_filter_properties( this ), "background", "colour:black" );
117 mlt_properties_set( mlt_filter_properties( this ), "transition.rotate_x", "10" );