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" );