2 * producer_pixbuf.c -- raster image loader based upon gdk-pixbuf
3 * Copyright (C) 2003-2004 Ushodaya Enterprises Limited
4 * Author: Dan Dennedy <dan@dennedy.org>
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * This library 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 GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 #include <framework/mlt_producer.h>
22 #include <framework/mlt_frame.h>
23 #include <gdk-pixbuf/gdk-pixbuf.h>
30 #include <sys/types.h>
35 static pthread_mutex_t fastmutex = PTHREAD_MUTEX_INITIALIZER;
37 typedef struct producer_pixbuf_s *producer_pixbuf;
39 struct producer_pixbuf_s
41 struct mlt_producer_s parent;
44 mlt_properties filenames;
54 static void load_filenames( producer_pixbuf this, mlt_properties producer_properties );
55 static void refresh_image( mlt_frame frame, int width, int height );
56 static int producer_get_frame( mlt_producer parent, mlt_frame_ptr frame, int index );
57 static void producer_close( mlt_producer parent );
59 mlt_producer producer_pixbuf_init( char *filename )
61 producer_pixbuf this = calloc( sizeof( struct producer_pixbuf_s ), 1 );
62 if ( this != NULL && mlt_producer_init( &this->parent, this ) == 0 )
64 mlt_producer producer = &this->parent;
66 // Get the properties interface
67 mlt_properties properties = MLT_PRODUCER_PROPERTIES( &this->parent );
69 // Callback registration
70 producer->get_frame = producer_get_frame;
71 producer->close = ( mlt_destructor )producer_close;
73 // Set the default properties
74 mlt_properties_set( properties, "resource", filename );
75 mlt_properties_set_int( properties, "ttl", 25 );
76 mlt_properties_set_int( properties, "aspect_ratio", 1 );
77 mlt_properties_set_int( properties, "progressive", 1 );
79 // Validate the resource
81 load_filenames( this, properties );
84 mlt_frame frame = mlt_frame_init( MLT_PRODUCER_SERVICE( producer ) );
87 mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
88 mlt_properties_set_data( properties, "producer_pixbuf", this, 0, NULL, NULL );
89 mlt_frame_set_position( frame, mlt_producer_position( producer ) );
90 mlt_properties_set_position( properties, "pixbuf_position", mlt_producer_position( producer ) );
91 refresh_image( frame, 0, 0 );
92 mlt_frame_close( frame );
95 if ( this->width == 0 )
97 producer_close( producer );
106 static void load_filenames( producer_pixbuf this, mlt_properties producer_properties )
108 char *filename = mlt_properties_get( producer_properties, "resource" );
109 this->filenames = mlt_properties_new( );
112 if ( strstr( filename, "<svg" ) )
114 // Generate a temporary file for the svg
115 char fullname[ 1024 ] = "/tmp/mlt.XXXXXX";
116 int fd = mkstemp( fullname );
120 // Write the svg into the temp file
121 ssize_t remaining_bytes;
122 char *xml = filename;
124 // Strip leading crap
125 while ( xml[0] != '<' )
128 remaining_bytes = strlen( xml );
129 while ( remaining_bytes > 0 )
130 remaining_bytes -= write( fd, xml + strlen( xml ) - remaining_bytes, remaining_bytes );
133 mlt_properties_set( this->filenames, "0", fullname );
135 // Teehe - when the producer closes, delete the temp file and the space allo
136 mlt_properties_set_data( producer_properties, "__temporary_file__", fullname, 0, ( mlt_destructor )unlink, NULL );
140 else if ( strchr( filename, '%' ) != NULL )
142 // handle picture sequences
143 int i = mlt_properties_get_int( producer_properties, "begin" );
152 snprintf( full, 1023, filename, i ++ );
153 if ( stat( full, &buf ) == 0 )
155 sprintf( key, "%d", keyvalue ++ );
156 mlt_properties_set( this->filenames, key, full );
165 else if ( strstr( filename, "/.all." ) != NULL )
167 char wildcard[ 1024 ];
168 char *dir_name = strdup( filename );
169 char *extension = strrchr( dir_name, '.' );
171 *( strstr( dir_name, "/.all." ) + 1 ) = '\0';
172 sprintf( wildcard, "*%s", extension );
174 mlt_properties_dir_list( this->filenames, dir_name, wildcard, 1 );
180 mlt_properties_set( this->filenames, "0", filename );
183 this->count = mlt_properties_count( this->filenames );
186 static void refresh_image( mlt_frame frame, int width, int height )
189 GdkPixbuf *pixbuf = mlt_properties_get_data( MLT_FRAME_PROPERTIES( frame ), "pixbuf", NULL );
190 GError *error = NULL;
192 // Obtain properties of frame
193 mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
195 // Obtain the producer for this frame
196 producer_pixbuf this = mlt_properties_get_data( properties, "producer_pixbuf", NULL );
198 // Obtain the producer
199 mlt_producer producer = &this->parent;
201 // Obtain properties of producer
202 mlt_properties producer_props = MLT_PRODUCER_PROPERTIES( producer );
204 // Check if user wants us to reload the image
205 if ( mlt_properties_get_int( producer_props, "force_reload" ) )
209 mlt_properties_set_int( producer_props, "force_reload", 0 );
212 // Obtain the cache flag and structure
213 int use_cache = mlt_properties_get_int( producer_props, "cache" );
214 mlt_properties cache = mlt_properties_get_data( producer_props, "_cache", NULL );
215 int update_cache = 0;
217 // Get the time to live for each frame
218 double ttl = mlt_properties_get_int( producer_props, "ttl" );
220 // Get the original position of this frame
221 mlt_position position = mlt_properties_get_position( properties, "pixbuf_position" );
222 position += mlt_producer_get_in( producer );
225 int image_idx = ( int )floor( ( double )position / ttl ) % this->count;
228 char image_key[ 10 ];
229 sprintf( image_key, "%d", image_idx );
231 pthread_mutex_lock( &fastmutex );
233 // Check if the frame is already loaded
238 cache = mlt_properties_new( );
239 mlt_properties_set_data( producer_props, "_cache", cache, 0, ( mlt_destructor )mlt_properties_close, NULL );
242 mlt_frame cached = mlt_properties_get_data( cache, image_key, NULL );
246 this->image_idx = image_idx;
247 mlt_properties cached_props = MLT_FRAME_PROPERTIES( cached );
248 this->width = mlt_properties_get_int( cached_props, "width" );
249 this->height = mlt_properties_get_int( cached_props, "height" );
250 mlt_properties_set_int( producer_props, "_real_width", mlt_properties_get_int( cached_props, "real_width" ) );
251 mlt_properties_set_int( producer_props, "_real_height", mlt_properties_get_int( cached_props, "real_height" ) );
252 this->image = mlt_properties_get_data( cached_props, "image", NULL );
253 this->alpha = mlt_properties_get_data( cached_props, "alpha", NULL );
255 if ( width != 0 && ( width != this->width || height != this->height ) )
260 // optimization for subsequent iterations on single picture
261 if ( width != 0 && this->image != NULL && image_idx == this->image_idx )
263 if ( width != this->width || height != this->height )
265 pixbuf = mlt_properties_get_data( producer_props, "_pixbuf", NULL );
268 else if ( pixbuf == NULL && ( this->image == NULL || image_idx != this->image_idx ) )
270 this->image_idx = image_idx;
271 pixbuf = gdk_pixbuf_new_from_file( mlt_properties_get_value( this->filenames, image_idx ), &error );
273 if ( pixbuf != NULL )
275 // Register this pixbuf for destruction and reuse
276 mlt_events_block( producer_props, NULL );
277 mlt_properties_set_data( producer_props, "_pixbuf", pixbuf, 0, ( mlt_destructor )g_object_unref, NULL );
278 g_object_ref( pixbuf );
279 mlt_properties_set_data( MLT_FRAME_PROPERTIES( frame ), "pixbuf", pixbuf, 0, ( mlt_destructor )g_object_unref, NULL );
281 mlt_properties_set_int( producer_props, "_real_width", gdk_pixbuf_get_width( pixbuf ) );
282 mlt_properties_set_int( producer_props, "_real_height", gdk_pixbuf_get_height( pixbuf ) );
283 mlt_events_unblock( producer_props, NULL );
285 // Store the width/height of the pixbuf temporarily
286 this->width = gdk_pixbuf_get_width( pixbuf );
287 this->height = gdk_pixbuf_get_height( pixbuf );
291 // If we have a pixbuf
292 if ( pixbuf && width > 0 )
294 char *interps = mlt_properties_get( properties, "rescale.interp" );
295 int interp = GDK_INTERP_BILINEAR;
297 if ( strcmp( interps, "nearest" ) == 0 )
298 interp = GDK_INTERP_NEAREST;
299 else if ( strcmp( interps, "tiles" ) == 0 )
300 interp = GDK_INTERP_TILES;
301 else if ( strcmp( interps, "hyper" ) == 0 )
302 interp = GDK_INTERP_HYPER;
304 // Note - the original pixbuf is already safe and ready for destruction
305 pixbuf = gdk_pixbuf_scale_simple( pixbuf, width, height, interp );
307 // Store width and height
309 this->height = height;
311 // Allocate/define image
312 if ( !use_cache && this->image )
313 mlt_pool_release( this->image );
314 this->image = mlt_pool_alloc( width * ( height + 1 ) * 2 );
316 // Extract YUV422 and alpha
317 if ( gdk_pixbuf_get_has_alpha( pixbuf ) )
319 // Allocate the alpha mask
320 if ( !use_cache && this->alpha )
321 mlt_pool_release( this->alpha );
322 this->alpha = mlt_pool_alloc( this->width * this->height );
325 mlt_convert_rgb24a_to_yuv422( gdk_pixbuf_get_pixels( pixbuf ),
326 this->width, this->height,
327 gdk_pixbuf_get_rowstride( pixbuf ),
328 this->image, this->alpha );
332 // No alpha to extract
333 mlt_convert_rgb24_to_yuv422( gdk_pixbuf_get_pixels( pixbuf ),
334 this->width, this->height,
335 gdk_pixbuf_get_rowstride( pixbuf ),
339 // Finished with pixbuf now
340 g_object_unref( pixbuf );
342 // Ensure we update the cache when we need to
343 update_cache = use_cache;
346 // Set width/height of frame
347 mlt_properties_set_int( properties, "width", this->width );
348 mlt_properties_set_int( properties, "height", this->height );
349 mlt_properties_set_int( properties, "real_width", mlt_properties_get_int( producer_props, "_real_width" ) );
350 mlt_properties_set_int( properties, "real_height", mlt_properties_get_int( producer_props, "_real_height" ) );
352 // pass the image data without destructor
353 mlt_properties_set_data( properties, "image", this->image, this->width * ( this->height + 1 ) * 2, NULL, NULL );
354 mlt_properties_set_data( properties, "alpha", this->alpha, this->width * this->height, NULL, NULL );
358 mlt_frame cached = mlt_frame_init( MLT_PRODUCER_SERVICE( producer ) );
359 mlt_properties cached_props = MLT_FRAME_PROPERTIES( cached );
360 mlt_properties_set_int( cached_props, "width", this->width );
361 mlt_properties_set_int( cached_props, "height", this->height );
362 mlt_properties_set_int( cached_props, "real_width", mlt_properties_get_int( producer_props, "_real_width" ) );
363 mlt_properties_set_int( cached_props, "real_height", mlt_properties_get_int( producer_props, "_real_height" ) );
364 mlt_properties_set_data( cached_props, "image", this->image, this->width * ( this->height + 1 ) * 2, mlt_pool_release, NULL );
365 mlt_properties_set_data( cached_props, "alpha", this->alpha, this->width * this->height, mlt_pool_release, NULL );
366 mlt_properties_set_data( cache, image_key, cached, 0, ( mlt_destructor )mlt_frame_close, NULL );
369 pthread_mutex_unlock( &fastmutex );
372 static int producer_get_image( mlt_frame frame, uint8_t **buffer, mlt_image_format *format, int *width, int *height, int writable )
374 // Obtain properties of frame
375 mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
377 // We need to know the size of the image to clone it
382 uint8_t *alpha = NULL;
384 *width = mlt_properties_get_int( properties, "rescale_width" );
385 *height = mlt_properties_get_int( properties, "rescale_height" );
388 refresh_image( frame, *width, *height );
391 *buffer = mlt_properties_get_data( properties, "image", &image_size );
392 alpha = mlt_properties_get_data( properties, "alpha", &alpha_size );
394 // Get width and height (may have changed during the refresh)
395 *width = mlt_properties_get_int( properties, "width" );
396 *height = mlt_properties_get_int( properties, "height" );
398 // NB: Cloning is necessary with this producer (due to processing of images ahead of use)
399 // The fault is not in the design of mlt, but in the implementation of the pixbuf producer...
400 if ( *buffer != NULL )
402 if ( *format == mlt_image_yuv422 || *format == mlt_image_yuv420p )
404 // Clone the image and the alpha
405 uint8_t *image_copy = mlt_pool_alloc( image_size );
406 uint8_t *alpha_copy = mlt_pool_alloc( alpha_size );
408 memcpy( image_copy, *buffer, image_size );
410 // Copy or default the alpha
412 memcpy( alpha_copy, alpha, alpha_size );
414 memset( alpha_copy, 255, alpha_size );
416 // Now update properties so we free the copy after
417 mlt_properties_set_data( properties, "image", image_copy, image_size, mlt_pool_release, NULL );
418 mlt_properties_set_data( properties, "alpha", alpha_copy, alpha_size, mlt_pool_release, NULL );
420 // We're going to pass the copy on
421 *buffer = image_copy;
423 else if ( *format == mlt_image_rgb24a )
425 // Clone the image and the alpha
426 image_size = *width * ( *height + 1 ) * 4;
427 alpha_size = *width * ( *height + 1 );
428 uint8_t *image_copy = mlt_pool_alloc( image_size );
429 uint8_t *alpha_copy = mlt_pool_alloc( alpha_size );
431 mlt_convert_yuv422_to_rgb24a(*buffer, image_copy, (*width)*(*height));
433 // Now update properties so we free the copy after
434 mlt_properties_set_data( properties, "image", image_copy, image_size, mlt_pool_release, NULL );
435 mlt_properties_set_data( properties, "alpha", alpha_copy, alpha_size, mlt_pool_release, NULL );
437 // We're going to pass the copy on
438 *buffer = image_copy;
444 // TODO: Review all cases of invalid images
445 *buffer = mlt_pool_alloc( 50 * 50 * 2 );
446 mlt_properties_set_data( properties, "image", *buffer, image_size, mlt_pool_release, NULL );
454 static uint8_t *producer_get_alpha_mask( mlt_frame this )
456 // Obtain properties of frame
457 mlt_properties properties = MLT_FRAME_PROPERTIES( this );
459 // Return the alpha mask
460 return mlt_properties_get_data( properties, "alpha", NULL );
463 static int producer_get_frame( mlt_producer producer, mlt_frame_ptr frame, int index )
465 // Get the real structure for this producer
466 producer_pixbuf this = producer->child;
468 // Fetch the producers properties
469 mlt_properties producer_properties = MLT_PRODUCER_PROPERTIES( producer );
471 if ( this->filenames == NULL && mlt_properties_get( producer_properties, "resource" ) != NULL )
472 load_filenames( this, producer_properties );
475 *frame = mlt_frame_init( MLT_PRODUCER_SERVICE( producer ) );
477 if ( *frame != NULL && this->count > 0 )
479 // Obtain properties of frame and producer
480 mlt_properties properties = MLT_FRAME_PROPERTIES( *frame );
482 // Set the producer on the frame properties
483 mlt_properties_set_data( properties, "producer_pixbuf", this, 0, NULL, NULL );
485 // Update timecode on the frame we're creating
486 mlt_frame_set_position( *frame, mlt_producer_position( producer ) );
488 // Ensure that we have a way to obtain the position in the get_image
489 mlt_properties_set_position( properties, "pixbuf_position", mlt_producer_position( producer ) );
492 refresh_image( *frame, 0, 0 );
494 // Set producer-specific frame properties
495 mlt_properties_set_int( properties, "progressive", mlt_properties_get_int( producer_properties, "progressive" ) );
496 mlt_properties_set_double( properties, "aspect_ratio", mlt_properties_get_double( producer_properties, "aspect_ratio" ) );
498 // Set alpha call back
499 ( *frame )->get_alpha_mask = producer_get_alpha_mask;
501 // Push the get_image method
502 mlt_frame_push_get_image( *frame, producer_get_image );
505 // Calculate the next timecode
506 mlt_producer_prepare_next( producer );
511 static void producer_close( mlt_producer parent )
513 producer_pixbuf this = parent->child;
514 if ( !mlt_properties_get_int( MLT_PRODUCER_PROPERTIES( parent ), "cache" ) )
516 mlt_pool_release( this->image );
517 mlt_pool_release( this->alpha );
519 parent->close = NULL;
520 mlt_producer_close( parent );
521 mlt_properties_close( this->filenames );