2 * transition_region.c -- region transition
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 "transition_region.h"
22 #include "transition_composite.h"
24 #include <framework/mlt.h>
30 static int create_instance( mlt_transition
this, char *name
, char *value
, int count
)
32 // Return from this function
35 // Duplicate the value
36 char *type
= strdup( value
);
38 // Pointer to filter argument
39 char *arg
= type
== NULL ? NULL
: strchr( type
, ':' );
41 // New filter being created
42 mlt_filter filter
= NULL
;
44 // Cleanup type and arg
49 filter
= mlt_factory_filter( type
, arg
);
51 // If we have a filter, then initialise and store it
55 mlt_properties properties
= mlt_transition_properties( this );
57 // String to hold the property name
60 // String to hold the passdown key
64 sprintf( id
, "_filter_%d", count
);
67 sprintf( key
, "%s.", name
);
69 // Just in case, let's assume that the filter here has a composite
70 mlt_properties_set( mlt_filter_properties( filter
), "composite.start", "0%,0%:100%x100%" );
71 mlt_properties_set( mlt_filter_properties( filter
), "composite.fill", "true" );
73 // Pass all the key properties on the filter down
74 mlt_properties_pass( mlt_filter_properties( filter
), properties
, key
);
76 // Ensure that filter is assigned
77 mlt_properties_set_data( properties
, id
, filter
, 0, ( mlt_destructor
)mlt_filter_close
, NULL
);
81 // Indicate that an error has occurred
88 // Return error condition
92 static uint8_t *filter_get_alpha_mask( mlt_frame
this )
94 // Obtain properties of frame
95 mlt_properties properties
= mlt_frame_properties( this );
97 // Get the shape frame
98 mlt_frame shape_frame
= mlt_properties_get_data( properties
, "shape_frame", NULL
);
100 // Get the width and height of the image
101 int region_width
= mlt_properties_get_int( mlt_frame_properties( this ), "width" );
102 int region_height
= mlt_properties_get_int( mlt_frame_properties( this ), "height" );
103 uint8_t *image
= NULL
;
104 mlt_image_format format
= mlt_image_yuv422
;
106 // Get the shape image to trigger alpha creation
107 mlt_properties_set( mlt_frame_properties( shape_frame
), "distort", "true" );
108 mlt_frame_get_image( shape_frame
, &image
, &format
, ®ion_width
, ®ion_height
, 0 );
110 return mlt_frame_get_alpha_mask( shape_frame
);
116 static int transition_get_image( mlt_frame frame
, uint8_t **image
, mlt_image_format
*format
, int *width
, int *height
, int writable
)
118 // Error we will return
121 // We will get the 'b frame' from the frame stack
122 mlt_frame b_frame
= mlt_frame_pop_frame( frame
);
124 // Get the watermark transition object
125 mlt_transition
this = mlt_frame_pop_service( frame
);
127 // Get the properties of the transition
128 mlt_properties properties
= mlt_transition_properties( this );
130 // Get the composite from the transition
131 mlt_transition composite
= mlt_properties_get_data( properties
, "composite", NULL
);
133 // Look for the first filter
134 mlt_filter filter
= mlt_properties_get_data( properties
, "_filter_0", NULL
);
136 // Get the unique id of the filter (used to reacquire the producer position)
137 char *name
= mlt_properties_get( properties
, "_unique_id" );
139 // Get the original producer position
140 mlt_position position
= mlt_properties_get_position( mlt_frame_properties( frame
), name
);
142 // Create a composite if we don't have one
143 if ( composite
== NULL
)
145 // Create composite via the factory
146 composite
= mlt_factory_transition( "composite", NULL
);
149 if ( composite
!= NULL
)
151 // Get the properties
152 mlt_properties composite_properties
= mlt_transition_properties( composite
);
154 // We want to ensure that we don't get a wobble...
155 mlt_properties_set( composite_properties
, "distort", "true" );
156 mlt_properties_set( composite_properties
, "progressive", "1" );
158 // Pass all the composite. properties on the transition down
159 mlt_properties_pass( composite_properties
, properties
, "composite." );
161 // Register the composite for reuse/destruction
162 mlt_properties_set_data( properties
, "composite", composite
, 0, ( mlt_destructor
)mlt_transition_close
, NULL
);
167 // Pass all current properties down
168 mlt_properties composite_properties
= mlt_transition_properties( composite
);
169 mlt_properties_pass( composite_properties
, properties
, "composite." );
173 if ( filter
== NULL
)
178 // Number of filters created
181 // Loop for all properties
182 for ( i
= 0; i
< mlt_properties_count( properties
); i
++ )
184 // Get the name of this property
185 char *name
= mlt_properties_get_name( properties
, i
);
187 // If the name does not contain a . and matches filter
188 if ( strchr( name
, '.' ) == NULL
&& !strncmp( name
, "filter", 6 ) )
190 // Get the filter constructor
191 char *value
= mlt_properties_get_value( properties
, i
);
193 // Create an instance
194 if ( create_instance( this, name
, value
, count
) == 0 )
201 // Pass all properties down
202 mlt_filter temp
= NULL
;
207 // Number of filters found
210 // Loop for all properties
211 for ( i
= 0; i
< mlt_properties_count( properties
); i
++ )
213 // Get the name of this property
214 char *name
= mlt_properties_get_name( properties
, i
);
216 // If the name does not contain a . and matches filter
217 if ( strchr( name
, '.' ) == NULL
&& !strncmp( name
, "filter", 6 ) )
219 // Strings to hold the id and pass down key
223 // Construct id and key
224 sprintf( id
, "_filter_%d", count
);
225 sprintf( key
, "%s.", name
);
228 temp
= mlt_properties_get_data( properties
, id
, NULL
);
232 mlt_properties_pass( mlt_filter_properties( temp
), properties
, key
);
240 error
= mlt_frame_get_image( frame
, image
, format
, width
, height
, 1 );
242 // Only continue if we have both filter and composite
243 if ( composite
!= NULL
)
245 // Get the resource of this filter (could be a shape [rectangle/circle] or an alpha provider of choice
246 char *resource
= mlt_properties_get( properties
, "resource" );
248 // String to hold the filter to query on
251 // Index to hold the count
254 // We will get the 'b frame' from the composite only if it's NULL
255 if ( b_frame
== NULL
)
258 b_frame
= composite_copy_region( composite
, frame
, position
);
260 // Ensure a destructor
261 mlt_properties_set_data( mlt_frame_properties( frame
), name
, b_frame
, 0, ( mlt_destructor
)mlt_frame_close
, NULL
);
264 // Make sure the filter is in the correct position
265 while ( filter
!= NULL
)
268 if ( mlt_properties_get_int( mlt_filter_properties( filter
), "off" ) == 0 )
269 mlt_filter_process( filter
, b_frame
);
271 // Generate the key for the next
272 sprintf( id
, "_filter_%d", ++ i
);
274 // Get the next filter
275 filter
= mlt_properties_get_data( properties
, id
, NULL
);
278 // Hmm - this is probably going to go wrong....
279 mlt_frame_set_position( frame
, position
);
281 // Get the b frame and process with composite if successful
282 mlt_transition_process( composite
, frame
, b_frame
);
284 // If we have a shape producer copy the alpha mask from the shape frame to the b_frame
285 if ( strcmp( resource
, "rectangle" ) != 0 )
287 // Get the producer from the transition
288 mlt_producer producer
= mlt_properties_get_data( properties
, "producer", NULL
);
290 // If We have no producer then create one
291 if ( producer
== NULL
)
293 // Get the factory producer service
294 char *factory
= mlt_properties_get( properties
, "factory" );
296 // Special case circle resource
297 if ( strcmp( resource
, "circle" ) == 0 )
299 // Special case to ensure that fezzik produces a pixbuf with a NULL constructor
302 // Specify the svg circle
303 mlt_properties_set( properties
, "producer.resource", "<svg width='100' height='100'><circle cx='50' cy='50' r='50' fill='black'/></svg>" );
306 // Create the producer
307 producer
= mlt_factory_producer( factory
, resource
);
310 if ( producer
!= NULL
)
312 // Get the producer properties
313 mlt_properties producer_properties
= mlt_producer_properties( producer
);
315 // Ensure that we loop
316 mlt_properties_set( producer_properties
, "eof", "loop" );
318 // Now pass all producer. properties on the transition down
319 mlt_properties_pass( producer_properties
, properties
, "producer." );
321 // Register the producer for reuse/destruction
322 mlt_properties_set_data( properties
, "producer", producer
, 0, ( mlt_destructor
)mlt_producer_close
, NULL
);
326 // Now use the shape producer
327 if ( producer
!= NULL
)
329 // We will get the alpha frame from the producer
330 mlt_frame shape_frame
= NULL
;
332 // Make sure the producer is in the correct position
333 mlt_producer_seek( producer
, position
);
335 // Get the shape frame
336 if ( mlt_service_get_frame( mlt_producer_service( producer
), &shape_frame
, 0 ) == 0 )
338 // Ensure that the shape frame will be closed
339 mlt_properties_set_data( mlt_frame_properties( b_frame
), "shape_frame", shape_frame
, 0, ( mlt_destructor
)mlt_frame_close
, NULL
);
341 // Specify the callback for evaluation
342 b_frame
->get_alpha_mask
= filter_get_alpha_mask
;
348 error
= mlt_frame_get_image( frame
, image
, format
, width
, height
, 0 );
354 /** Filter processing.
357 static mlt_frame
transition_process( mlt_transition
this, mlt_frame a_frame
, mlt_frame b_frame
)
359 // Get the properties of the frame
360 mlt_properties properties
= mlt_frame_properties( a_frame
);
362 // Get a unique name to store the frame position
363 char *name
= mlt_properties_get( mlt_transition_properties( this ), "_unique_id" );
365 // Assign the current position to the name
366 mlt_properties_set_position( properties
, name
, mlt_frame_get_position( a_frame
) );
368 // Push the transition on to the frame
369 mlt_frame_push_service( a_frame
, this );
371 // Push the b_frame on to the stack
372 mlt_frame_push_frame( a_frame
, b_frame
);
374 // Push the transition method
375 mlt_frame_push_get_image( a_frame
, transition_get_image
);
381 /** Constructor for the transition.
384 mlt_transition
transition_region_init( void *arg
)
386 // Create a new transition
387 mlt_transition
this = mlt_transition_new( );
389 // Further initialisation
392 // Get the properties from the transition
393 mlt_properties properties
= mlt_transition_properties( this );
395 // Assign the transition process method
396 this->process
= transition_process
;
399 mlt_properties_set( properties
, "factory", "fezzik" );
401 // Resource defines the shape of the region
402 mlt_properties_set( properties
, "resource", arg
== NULL ?
"rectangle" : arg
);
405 // Return the transition