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 double consumer_ar
= mlt_properties_get_double( frame_properties
, "consumer_aspect_ratio" );
69 mlt_properties_set_position( MLT_TRANSITION_PROPERTIES( transition
), "in", mlt_filter_get_in( filter
) );
70 mlt_properties_set_position( MLT_TRANSITION_PROPERTIES( transition
), "out", mlt_filter_get_out( filter
) );
71 mlt_producer_seek( producer
, position
);
72 mlt_frame_set_position( this, position
);
73 mlt_properties_pass( MLT_PRODUCER_PROPERTIES( producer
), properties
, "producer." );
74 mlt_properties_pass( MLT_TRANSITION_PROPERTIES( transition
), properties
, "transition." );
75 mlt_service_get_frame( MLT_PRODUCER_SERVICE( producer
), &a_frame
, 0 );
76 mlt_properties_set( MLT_FRAME_PROPERTIES( a_frame
), "rescale.interp", "nearest" );
77 mlt_properties_set_int( MLT_FRAME_PROPERTIES( a_frame
), "distort", 1 );
79 // Special case - aspect_ratio = 0
80 if ( mlt_properties_get_double( frame_properties
, "aspect_ratio" ) == 0 )
81 mlt_properties_set_double( frame_properties
, "aspect_ratio", consumer_ar
);
82 if ( mlt_properties_get_double( MLT_FRAME_PROPERTIES( a_frame
), "aspect_ratio" ) == 0 )
83 mlt_properties_set_double( MLT_FRAME_PROPERTIES( a_frame
), "aspect_ratio", consumer_ar
);
84 mlt_properties_set_double( MLT_FRAME_PROPERTIES( a_frame
), "consumer_aspect_ratio", consumer_ar
);
86 mlt_transition_process( transition
, a_frame
, this );
87 mlt_frame_get_image( a_frame
, image
, format
, width
, height
, writable
);
88 mlt_properties_set_data( frame_properties
, "affine_frame", a_frame
, 0, (mlt_destructor
)mlt_frame_close
, NULL
);
89 mlt_properties_set_data( frame_properties
, "image", *image
, *width
* *height
* 2, NULL
, NULL
);
90 mlt_properties_set_data( frame_properties
, "alpha", mlt_frame_get_alpha_mask( a_frame
), *width
* *height
, NULL
, NULL
);
97 /** Filter processing.
100 static mlt_frame
filter_process( mlt_filter
this, mlt_frame frame
)
102 // Get the properties of the frame
103 mlt_properties properties
= MLT_FRAME_PROPERTIES( frame
);
105 // Get a unique name to store the frame position
106 char *name
= mlt_properties_get( MLT_FILTER_PROPERTIES( this ), "_unique_id" );
108 // Assign the current position to the name
109 mlt_properties_set_position( properties
, name
, mlt_frame_get_position( frame
) - mlt_filter_get_in( this ) );
111 // Push the frame filter
112 mlt_frame_push_service( frame
, this );
113 mlt_frame_push_get_image( frame
, filter_get_image
);
118 /** Constructor for the filter.
121 mlt_filter
filter_affine_init( char *arg
)
123 mlt_filter
this = mlt_filter_new( );
126 this->process
= filter_process
;
127 mlt_properties_set( MLT_FILTER_PROPERTIES( this ), "background", "colour:black" );
128 mlt_properties_set( MLT_FILTER_PROPERTIES( this ), "transition.rotate_x", "10" );