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
);
132 static void apply_filters( mlt_filter
this, mlt_frame frame
, int index
)
134 mlt_service service
= mlt_filter_service( this );
135 mlt_properties properties
= mlt_filter_properties( this );
138 if ( index
== 0 || mlt_properties_get_int( properties
, "_filter_private" ) == 0 )
140 mlt_filter filter
= NULL
;
141 for ( i
= 0; ( filter
= mlt_service_filter( service
, i
) ) != NULL
; i
++ )
143 mlt_filter_process( filter
, frame
);
144 apply_filters( filter
, frame
, 1 );
152 static int transition_get_image( mlt_frame frame
, uint8_t **image
, mlt_image_format
*format
, int *width
, int *height
, int writable
)
154 // Error we will return
157 // We will get the 'b frame' from the frame stack
158 mlt_frame b_frame
= mlt_frame_pop_frame( frame
);
160 // Get the watermark transition object
161 mlt_transition
this = mlt_frame_pop_service( frame
);
163 // Get the properties of the transition
164 mlt_properties properties
= mlt_transition_properties( this );
166 // Get the composite from the transition
167 mlt_transition composite
= mlt_properties_get_data( properties
, "composite", NULL
);
169 // Look for the first filter
170 mlt_filter filter
= mlt_properties_get_data( properties
, "_filter_0", NULL
);
172 // Get the unique id of the filter (used to reacquire the producer position)
173 char *name
= mlt_properties_get( properties
, "_unique_id" );
175 // Get the original producer position
176 mlt_position position
= mlt_properties_get_position( mlt_frame_properties( frame
), name
);
178 // Create a composite if we don't have one
179 if ( composite
== NULL
)
181 // Create composite via the factory
182 composite
= mlt_factory_transition( "composite", NULL
);
185 if ( composite
!= NULL
)
187 // Get the properties
188 mlt_properties composite_properties
= mlt_transition_properties( composite
);
190 // We want to ensure that we don't get a wobble...
191 mlt_properties_set( composite_properties
, "distort", "true" );
192 mlt_properties_set( composite_properties
, "progressive", "1" );
194 // Pass all the composite. properties on the transition down
195 mlt_properties_pass( composite_properties
, properties
, "composite." );
197 // Register the composite for reuse/destruction
198 mlt_properties_set_data( properties
, "composite", composite
, 0, ( mlt_destructor
)mlt_transition_close
, NULL
);
203 // Pass all current properties down
204 mlt_properties composite_properties
= mlt_transition_properties( composite
);
205 mlt_properties_pass( composite_properties
, properties
, "composite." );
209 if ( filter
== NULL
)
214 // Number of filters created
217 // Loop for all properties
218 for ( i
= 0; i
< mlt_properties_count( properties
); i
++ )
220 // Get the name of this property
221 char *name
= mlt_properties_get_name( properties
, i
);
223 // If the name does not contain a . and matches filter
224 if ( strchr( name
, '.' ) == NULL
&& !strncmp( name
, "filter", 6 ) )
226 // Get the filter constructor
227 char *value
= mlt_properties_get_value( properties
, i
);
229 // Create an instance
230 if ( create_instance( this, name
, value
, count
) == 0 )
237 // Pass all properties down
238 mlt_filter temp
= NULL
;
243 // Number of filters found
246 // Loop for all properties
247 for ( i
= 0; i
< mlt_properties_count( properties
); i
++ )
249 // Get the name of this property
250 char *name
= mlt_properties_get_name( properties
, i
);
252 // If the name does not contain a . and matches filter
253 if ( strchr( name
, '.' ) == NULL
&& !strncmp( name
, "filter", 6 ) )
255 // Strings to hold the id and pass down key
259 // Construct id and key
260 sprintf( id
, "_filter_%d", count
);
261 sprintf( key
, "%s.", name
);
264 temp
= mlt_properties_get_data( properties
, id
, NULL
);
268 mlt_properties_pass( mlt_filter_properties( temp
), properties
, key
);
276 error
= mlt_frame_get_image( frame
, image
, format
, width
, height
, 1 );
278 // Only continue if we have both filter and composite
279 if ( composite
!= NULL
)
281 // Get the resource of this filter (could be a shape [rectangle/circle] or an alpha provider of choice
282 char *resource
= mlt_properties_get( properties
, "resource" );
284 // Get the old resource in case it's changed
285 char *old_resource
= mlt_properties_get( properties
, "_old_resource" );
287 // String to hold the filter to query on
290 // Index to hold the count
293 // We will get the 'b frame' from the composite only if it's NULL
294 if ( b_frame
== NULL
)
297 b_frame
= composite_copy_region( composite
, frame
, position
);
299 // Ensure a destructor
300 mlt_properties_set_data( mlt_frame_properties( frame
), name
, b_frame
, 0, ( mlt_destructor
)mlt_frame_close
, NULL
);
303 // Make sure the filter is in the correct position
304 while ( filter
!= NULL
)
307 if ( mlt_properties_get_int( mlt_filter_properties( filter
), "off" ) == 0 )
308 mlt_filter_process( filter
, b_frame
);
310 // Generate the key for the next
311 sprintf( id
, "_filter_%d", ++ i
);
313 // Get the next filter
314 filter
= mlt_properties_get_data( properties
, id
, NULL
);
317 // Allow filters to be attached to a region filter
318 filter
= mlt_properties_get_data( properties
, "_region_filter", NULL
);
319 if ( filter
!= NULL
)
320 apply_filters( filter
, b_frame
, 0 );
322 // Hmm - this is probably going to go wrong....
323 mlt_frame_set_position( frame
, position
);
325 // Get the b frame and process with composite if successful
326 mlt_transition_process( composite
, frame
, b_frame
);
328 // If we have a shape producer copy the alpha mask from the shape frame to the b_frame
329 if ( strcmp( resource
, "rectangle" ) != 0 )
331 // Get the producer from the transition
332 mlt_producer producer
= mlt_properties_get_data( properties
, "producer", NULL
);
334 // If We have no producer then create one
335 if ( producer
== NULL
|| ( old_resource
!= NULL
&& strcmp( resource
, old_resource
) ) )
337 // Get the factory producer service
338 char *factory
= mlt_properties_get( properties
, "factory" );
340 // Store the old resource
341 mlt_properties_set( properties
, "_old_resource", resource
);
343 // Special case circle resource
344 if ( strcmp( resource
, "circle" ) == 0 )
346 // Special case to ensure that fezzik produces a pixbuf with a NULL constructor
349 // Specify the svg circle
350 mlt_properties_set( properties
, "producer.resource", "<svg width='100' height='100'><circle cx='50' cy='50' r='50' fill='black'/></svg>" );
353 // Create the producer
354 producer
= mlt_factory_producer( factory
, resource
);
357 if ( producer
!= NULL
)
359 // Get the producer properties
360 mlt_properties producer_properties
= mlt_producer_properties( producer
);
362 // Ensure that we loop
363 mlt_properties_set( producer_properties
, "eof", "loop" );
365 // Now pass all producer. properties on the transition down
366 mlt_properties_pass( producer_properties
, properties
, "producer." );
368 // Register the producer for reuse/destruction
369 mlt_properties_set_data( properties
, "producer", producer
, 0, ( mlt_destructor
)mlt_producer_close
, NULL
);
373 // Now use the shape producer
374 if ( producer
!= NULL
)
376 // We will get the alpha frame from the producer
377 mlt_frame shape_frame
= NULL
;
379 // Make sure the producer is in the correct position
380 mlt_producer_seek( producer
, position
);
382 // Get the shape frame
383 if ( mlt_service_get_frame( mlt_producer_service( producer
), &shape_frame
, 0 ) == 0 )
385 // Ensure that the shape frame will be closed
386 mlt_properties_set_data( mlt_frame_properties( b_frame
), "shape_frame", shape_frame
, 0, ( mlt_destructor
)mlt_frame_close
, NULL
);
388 // Specify the callback for evaluation
389 b_frame
->get_alpha_mask
= filter_get_alpha_mask
;
395 error
= mlt_frame_get_image( frame
, image
, format
, width
, height
, 0 );
401 /** Filter processing.
404 static mlt_frame
transition_process( mlt_transition
this, mlt_frame a_frame
, mlt_frame b_frame
)
406 // Get the properties of the frame
407 mlt_properties properties
= mlt_frame_properties( a_frame
);
409 // Get a unique name to store the frame position
410 char *name
= mlt_properties_get( mlt_transition_properties( this ), "_unique_id" );
412 // Assign the current position to the name
413 mlt_properties_set_position( properties
, name
, mlt_frame_get_position( a_frame
) );
415 // Push the transition on to the frame
416 mlt_frame_push_service( a_frame
, this );
418 // Push the b_frame on to the stack
419 mlt_frame_push_frame( a_frame
, b_frame
);
421 // Push the transition method
422 mlt_frame_push_get_image( a_frame
, transition_get_image
);
428 /** Constructor for the transition.
431 mlt_transition
transition_region_init( void *arg
)
433 // Create a new transition
434 mlt_transition
this = mlt_transition_new( );
436 // Further initialisation
439 // Get the properties from the transition
440 mlt_properties properties
= mlt_transition_properties( this );
442 // Assign the transition process method
443 this->process
= transition_process
;
446 mlt_properties_set( properties
, "factory", "fezzik" );
448 // Resource defines the shape of the region
449 mlt_properties_set( properties
, "resource", arg
== NULL ?
"rectangle" : arg
);
452 // Return the transition