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 uint8_t *alpha
= NULL
;
96 // Obtain properties of frame
97 mlt_properties properties
= MLT_FRAME_PROPERTIES( this );
99 // Get the shape frame
100 mlt_frame shape_frame
= mlt_properties_get_data( properties
, "shape_frame", NULL
);
102 // Get the width and height of the image
103 int region_width
= mlt_properties_get_int( MLT_FRAME_PROPERTIES( this ), "width" );
104 int region_height
= mlt_properties_get_int( MLT_FRAME_PROPERTIES( this ), "height" );
105 uint8_t *image
= NULL
;
106 mlt_image_format format
= mlt_image_yuv422
;
108 // Get the shape image to trigger alpha creation
109 mlt_properties_set( MLT_FRAME_PROPERTIES( shape_frame
), "distort", "true" );
110 mlt_frame_get_image( shape_frame
, &image
, &format
, ®ion_width
, ®ion_height
, 0 );
112 alpha
= mlt_frame_get_alpha_mask( shape_frame
);
114 // Generate from the Y component of the image if no alpha available
117 int size
= region_width
* region_height
;
118 uint8_t *p
= mlt_pool_alloc( size
);
125 mlt_properties_set_data( MLT_FRAME_PROPERTIES( shape_frame
), "alpha", alpha
,
126 region_width
* region_height
, mlt_pool_release
, NULL
);
135 static int transition_get_image( mlt_frame frame
, uint8_t **image
, mlt_image_format
*format
, int *width
, int *height
, int writable
)
137 // Error we will return
140 // We will get the 'b frame' from the frame stack
141 mlt_frame b_frame
= mlt_frame_pop_frame( frame
);
143 // Get the watermark transition object
144 mlt_transition
this = mlt_frame_pop_service( frame
);
146 // Get the properties of the transition
147 mlt_properties properties
= MLT_TRANSITION_PROPERTIES( this );
149 // Get the composite from the transition
150 mlt_transition composite
= mlt_properties_get_data( properties
, "composite", NULL
);
152 // Look for the first filter
153 mlt_filter filter
= mlt_properties_get_data( properties
, "_filter_0", NULL
);
155 // Get the unique id of the filter (used to reacquire the producer position)
156 char *name
= mlt_properties_get( properties
, "_unique_id" );
158 // Get the original producer position
159 mlt_position position
= mlt_properties_get_position( MLT_FRAME_PROPERTIES( frame
), name
);
161 // Create a composite if we don't have one
162 if ( composite
== NULL
)
164 // Create composite via the factory
165 composite
= mlt_factory_transition( "composite", NULL
);
168 if ( composite
!= NULL
)
170 // Get the properties
171 mlt_properties composite_properties
= MLT_TRANSITION_PROPERTIES( composite
);
173 // We want to ensure that we don't get a wobble...
174 mlt_properties_set( composite_properties
, "distort", "true" );
175 mlt_properties_set( composite_properties
, "progressive", "1" );
177 // Pass all the composite. properties on the transition down
178 mlt_properties_pass( composite_properties
, properties
, "composite." );
180 // Register the composite for reuse/destruction
181 mlt_properties_set_data( properties
, "composite", composite
, 0, ( mlt_destructor
)mlt_transition_close
, NULL
);
186 // Pass all current properties down
187 mlt_properties composite_properties
= MLT_TRANSITION_PROPERTIES( composite
);
188 mlt_properties_pass( composite_properties
, properties
, "composite." );
192 if ( filter
== NULL
)
197 // Number of filters created
200 // Loop for all properties
201 for ( i
= 0; i
< mlt_properties_count( properties
); i
++ )
203 // Get the name of this property
204 char *name
= mlt_properties_get_name( properties
, i
);
206 // If the name does not contain a . and matches filter
207 if ( strchr( name
, '.' ) == NULL
&& !strncmp( name
, "filter", 6 ) )
209 // Get the filter constructor
210 char *value
= mlt_properties_get_value( properties
, i
);
212 // Create an instance
213 if ( create_instance( this, name
, value
, count
) == 0 )
218 // Look for the first filter again
219 filter
= mlt_properties_get_data( properties
, "_filter_0", NULL
);
223 // Pass all properties down
224 mlt_filter temp
= NULL
;
229 // Number of filters found
232 // Loop for all properties
233 for ( i
= 0; i
< mlt_properties_count( properties
); i
++ )
235 // Get the name of this property
236 char *name
= mlt_properties_get_name( properties
, i
);
238 // If the name does not contain a . and matches filter
239 if ( strchr( name
, '.' ) == NULL
&& !strncmp( name
, "filter", 6 ) )
241 // Strings to hold the id and pass down key
245 // Construct id and key
246 sprintf( id
, "_filter_%d", count
);
247 sprintf( key
, "%s.", name
);
250 temp
= mlt_properties_get_data( properties
, id
, NULL
);
254 mlt_properties_pass( MLT_FILTER_PROPERTIES( temp
), properties
, key
);
262 error
= mlt_frame_get_image( frame
, image
, format
, width
, height
, 1 );
264 // Only continue if we have both filter and composite
265 if ( composite
!= NULL
)
267 // Get the resource of this filter (could be a shape [rectangle/circle] or an alpha provider of choice
268 char *resource
= mlt_properties_get( properties
, "resource" );
270 // Get the old resource in case it's changed
271 char *old_resource
= mlt_properties_get( properties
, "_old_resource" );
273 // String to hold the filter to query on
276 // Index to hold the count
279 // We will get the 'b frame' from the composite only if it's NULL
280 if ( b_frame
== NULL
)
283 b_frame
= composite_copy_region( composite
, frame
, position
);
285 // Ensure a destructor
286 mlt_properties_set_data( MLT_FRAME_PROPERTIES( frame
), name
, b_frame
, 0, ( mlt_destructor
)mlt_frame_close
, NULL
);
289 // Set the position of the b_frame
290 mlt_frame_set_position( b_frame
, position
);
292 // Make sure the filter is in the correct position
293 while ( filter
!= NULL
)
296 if ( mlt_properties_get_int( MLT_FILTER_PROPERTIES( filter
), "off" ) == 0 )
297 mlt_filter_process( filter
, b_frame
);
299 // Generate the key for the next
300 sprintf( id
, "_filter_%d", ++ i
);
302 // Get the next filter
303 filter
= mlt_properties_get_data( properties
, id
, NULL
);
306 // Allow filters to be attached to a region filter
307 filter
= mlt_properties_get_data( properties
, "_region_filter", NULL
);
308 if ( filter
!= NULL
)
309 mlt_service_apply_filters( MLT_FILTER_SERVICE( filter
), b_frame
, 0 );
311 // Hmm - this is probably going to go wrong....
312 mlt_frame_set_position( frame
, position
);
314 // Get the b frame and process with composite if successful
315 mlt_transition_process( composite
, frame
, b_frame
);
317 // If we have a shape producer copy the alpha mask from the shape frame to the b_frame
318 if ( strcmp( resource
, "rectangle" ) != 0 )
320 // Get the producer from the transition
321 mlt_producer producer
= mlt_properties_get_data( properties
, "producer", NULL
);
323 // If We have no producer then create one
324 if ( producer
== NULL
|| ( old_resource
!= NULL
&& strcmp( resource
, old_resource
) ) )
326 // Get the factory producer service
327 char *factory
= mlt_properties_get( properties
, "factory" );
329 // Store the old resource
330 mlt_properties_set( properties
, "_old_resource", resource
);
332 // Special case circle resource
333 if ( strcmp( resource
, "circle" ) == 0 )
335 // Special case to ensure that fezzik produces a pixbuf with a NULL constructor
338 // Specify the svg circle
339 mlt_properties_set( properties
, "producer.resource", "<svg width='100' height='100'><circle cx='50' cy='50' r='50' fill='black'/></svg>" );
342 // Create the producer
343 producer
= mlt_factory_producer( factory
, resource
);
346 if ( producer
!= NULL
)
348 // Get the producer properties
349 mlt_properties producer_properties
= MLT_PRODUCER_PROPERTIES( producer
);
351 // Ensure that we loop
352 mlt_properties_set( producer_properties
, "eof", "loop" );
354 // Now pass all producer. properties on the transition down
355 mlt_properties_pass( producer_properties
, properties
, "producer." );
357 // Register the producer for reuse/destruction
358 mlt_properties_set_data( properties
, "producer", producer
, 0, ( mlt_destructor
)mlt_producer_close
, NULL
);
362 // Now use the shape producer
363 if ( producer
!= NULL
)
365 // We will get the alpha frame from the producer
366 mlt_frame shape_frame
= NULL
;
368 // Make sure the producer is in the correct position
369 mlt_producer_seek( producer
, position
);
371 // Get the shape frame
372 if ( mlt_service_get_frame( MLT_PRODUCER_SERVICE( producer
), &shape_frame
, 0 ) == 0 )
374 // Ensure that the shape frame will be closed
375 mlt_properties_set_data( MLT_FRAME_PROPERTIES( b_frame
), "shape_frame", shape_frame
, 0, ( mlt_destructor
)mlt_frame_close
, NULL
);
377 // Specify the callback for evaluation
378 b_frame
->get_alpha_mask
= filter_get_alpha_mask
;
384 error
= mlt_frame_get_image( frame
, image
, format
, width
, height
, 0 );
390 /** Filter processing.
393 static mlt_frame
transition_process( mlt_transition
this, mlt_frame a_frame
, mlt_frame b_frame
)
395 // Get the properties of the frame
396 mlt_properties properties
= MLT_FRAME_PROPERTIES( a_frame
);
398 // Get a unique name to store the frame position
399 char *name
= mlt_properties_get( MLT_TRANSITION_PROPERTIES( this ), "_unique_id" );
401 // Assign the current position to the name
402 mlt_properties_set_position( properties
, name
, mlt_frame_get_position( a_frame
) );
404 // Push the transition on to the frame
405 mlt_frame_push_service( a_frame
, this );
407 // Push the b_frame on to the stack
408 mlt_frame_push_frame( a_frame
, b_frame
);
410 // Push the transition method
411 mlt_frame_push_get_image( a_frame
, transition_get_image
);
417 /** Constructor for the transition.
420 mlt_transition
transition_region_init( void *arg
)
422 // Create a new transition
423 mlt_transition
this = mlt_transition_new( );
425 // Further initialisation
428 // Get the properties from the transition
429 mlt_properties properties
= MLT_TRANSITION_PROPERTIES( this );
431 // Assign the transition process method
432 this->process
= transition_process
;
435 mlt_properties_set( properties
, "factory", "fezzik" );
437 // Resource defines the shape of the region
438 mlt_properties_set( properties
, "resource", arg
== NULL ?
"rectangle" : arg
);
441 // Return the transition