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+ Changed incorrect global variable to static
[melted] / src / modules / gtk2 / producer_pixbuf.c
1 /*
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>
5 *
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.
10 *
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.
15 *
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.
19 */
20
21 #include "producer_pixbuf.h"
22 #include <framework/mlt_frame.h>
23 #include <gdk-pixbuf/gdk-pixbuf.h>
24
25 #include <stdio.h>
26 #include <stdlib.h>
27 #include <string.h>
28 #include <pthread.h>
29 #include <math.h>
30 #include <sys/types.h>
31 #include <sys/stat.h>
32 #include <unistd.h>
33 #include <dirent.h>
34
35 static pthread_mutex_t fastmutex = PTHREAD_MUTEX_INITIALIZER;
36
37 typedef struct producer_pixbuf_s *producer_pixbuf;
38
39 struct producer_pixbuf_s
40 {
41 struct mlt_producer_s parent;
42
43 // File name list
44 char **filenames;
45 int count;
46 int image_idx;
47
48 int width;
49 int height;
50 uint8_t *image;
51 uint8_t *alpha;
52 };
53
54 static int producer_get_frame( mlt_producer parent, mlt_frame_ptr frame, int index );
55 static void producer_close( mlt_producer parent );
56
57 static int filter_files( const struct dirent *de )
58 {
59 if ( de->d_name[ 0 ] != '.' )
60 return 1;
61 else
62 return 0;
63 }
64
65 mlt_producer producer_pixbuf_init( char *filename )
66 {
67 producer_pixbuf this = calloc( sizeof( struct producer_pixbuf_s ), 1 );
68 if ( this != NULL && mlt_producer_init( &this->parent, this ) == 0 )
69 {
70 mlt_producer producer = &this->parent;
71
72 // Get the properties interface
73 mlt_properties properties = MLT_PRODUCER_PROPERTIES( &this->parent );
74
75 // Callback registration
76 producer->get_frame = producer_get_frame;
77 producer->close = ( mlt_destructor )producer_close;
78
79 // Set the default properties
80 mlt_properties_set( properties, "resource", filename );
81 mlt_properties_set_int( properties, "ttl", 25 );
82 mlt_properties_set_int( properties, "aspect_ratio", 1 );
83 mlt_properties_set_int( properties, "progressive", 1 );
84
85 return producer;
86 }
87 free( this );
88 return NULL;
89 }
90
91 static void refresh_image( mlt_frame frame, int width, int height )
92 {
93 // Pixbuf
94 GdkPixbuf *pixbuf = mlt_properties_get_data( MLT_FRAME_PROPERTIES( frame ), "pixbuf", NULL );
95 GError *error = NULL;
96
97 // Obtain properties of frame
98 mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
99
100 // Obtain the producer for this frame
101 producer_pixbuf this = mlt_properties_get_data( properties, "producer_pixbuf", NULL );
102
103 // Obtain the producer
104 mlt_producer producer = &this->parent;
105
106 // Obtain properties of producer
107 mlt_properties producer_props = MLT_PRODUCER_PROPERTIES( producer );
108
109 // Get the time to live for each frame
110 double ttl = mlt_properties_get_int( producer_props, "ttl" );
111
112 // Get the original position of this frame
113 mlt_position position = mlt_properties_get_position( properties, "pixbuf_position" );
114
115 // Image index
116 int image_idx = ( int )floor( ( double )position / ttl ) % this->count;
117
118 pthread_mutex_lock( &fastmutex );
119
120 // optimization for subsequent iterations on single picture
121 if ( width != 0 && this->image != NULL && image_idx == this->image_idx )
122 {
123 if ( width != this->width || height != this->height )
124 {
125 pixbuf = mlt_properties_get_data( producer_props, "_pixbuf", NULL );
126 mlt_pool_release( this->image );
127 mlt_pool_release( this->alpha );
128 this->image = NULL;
129 this->alpha = NULL;
130 }
131 }
132 else if ( pixbuf == NULL && ( this->image == NULL || image_idx != this->image_idx ) )
133 {
134 mlt_pool_release( this->image );
135 mlt_pool_release( this->alpha );
136 this->image = NULL;
137 this->alpha = NULL;
138
139 this->image_idx = image_idx;
140 pixbuf = gdk_pixbuf_new_from_file( this->filenames[ image_idx ], &error );
141
142 if ( pixbuf != NULL )
143 {
144 // Register this pixbuf for destruction and reuse
145 mlt_events_block( producer_props, NULL );
146 mlt_properties_set_data( producer_props, "_pixbuf", pixbuf, 0, ( mlt_destructor )g_object_unref, NULL );
147 g_object_ref( pixbuf );
148 mlt_properties_set_data( MLT_FRAME_PROPERTIES( frame ), "pixbuf", pixbuf, 0, ( mlt_destructor )g_object_unref, NULL );
149
150 mlt_properties_set_int( producer_props, "_real_width", gdk_pixbuf_get_width( pixbuf ) );
151 mlt_properties_set_int( producer_props, "_real_height", gdk_pixbuf_get_height( pixbuf ) );
152 mlt_events_unblock( producer_props, NULL );
153
154 // Store the width/height of the pixbuf temporarily
155 this->width = gdk_pixbuf_get_width( pixbuf );
156 this->height = gdk_pixbuf_get_height( pixbuf );
157 }
158 }
159
160 // If we have a pixbuf
161 if ( pixbuf && width > 0 )
162 {
163 char *interps = mlt_properties_get( properties, "rescale.interp" );
164 int interp = GDK_INTERP_BILINEAR;
165
166 if ( strcmp( interps, "nearest" ) == 0 )
167 interp = GDK_INTERP_NEAREST;
168 else if ( strcmp( interps, "tiles" ) == 0 )
169 interp = GDK_INTERP_TILES;
170 else if ( strcmp( interps, "hyper" ) == 0 )
171 interp = GDK_INTERP_HYPER;
172
173 // Note - the original pixbuf is already safe and ready for destruction
174 pixbuf = gdk_pixbuf_scale_simple( pixbuf, width, height, interp );
175
176 // Store width and height
177 this->width = width;
178 this->height = height;
179
180 // Allocate/define image
181 this->image = mlt_pool_alloc( width * ( height + 1 ) * 2 );
182
183 // Extract YUV422 and alpha
184 if ( gdk_pixbuf_get_has_alpha( pixbuf ) )
185 {
186 // Allocate the alpha mask
187 this->alpha = mlt_pool_alloc( this->width * this->height );
188
189 // Convert the image
190 mlt_convert_rgb24a_to_yuv422( gdk_pixbuf_get_pixels( pixbuf ),
191 this->width, this->height,
192 gdk_pixbuf_get_rowstride( pixbuf ),
193 this->image, this->alpha );
194 }
195 else
196 {
197 // No alpha to extract
198 mlt_convert_rgb24_to_yuv422( gdk_pixbuf_get_pixels( pixbuf ),
199 this->width, this->height,
200 gdk_pixbuf_get_rowstride( pixbuf ),
201 this->image );
202 }
203
204 // Finished with pixbuf now
205 g_object_unref( pixbuf );
206 }
207
208 // Set width/height of frame
209 mlt_properties_set_int( properties, "width", this->width );
210 mlt_properties_set_int( properties, "height", this->height );
211 mlt_properties_set_int( properties, "real_width", mlt_properties_get_int( producer_props, "_real_width" ) );
212 mlt_properties_set_int( properties, "real_height", mlt_properties_get_int( producer_props, "_real_height" ) );
213
214 // pass the image data without destructor
215 mlt_properties_set_data( properties, "image", this->image, this->width * ( this->height + 1 ) * 2, NULL, NULL );
216 mlt_properties_set_data( properties, "alpha", this->alpha, this->width * this->height, NULL, NULL );
217
218 pthread_mutex_unlock( &fastmutex );
219 }
220
221 static int producer_get_image( mlt_frame frame, uint8_t **buffer, mlt_image_format *format, int *width, int *height, int writable )
222 {
223 // Obtain properties of frame
224 mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
225
226 // We need to know the size of the image to clone it
227 int image_size = 0;
228 int alpha_size = 0;
229
230 // Alpha channel
231 uint8_t *alpha = NULL;
232
233 *width = mlt_properties_get_int( properties, "rescale_width" );
234 *height = mlt_properties_get_int( properties, "rescale_height" );
235
236 // Refresh the image
237 refresh_image( frame, *width, *height );
238
239 // Get the image
240 *buffer = mlt_properties_get_data( properties, "image", &image_size );
241 alpha = mlt_properties_get_data( properties, "alpha", &alpha_size );
242
243 // Get width and height (may have changed during the refresh)
244 *width = mlt_properties_get_int( properties, "width" );
245 *height = mlt_properties_get_int( properties, "height" );
246
247 // NB: Cloning is necessary with this producer (due to processing of images ahead of use)
248 // The fault is not in the design of mlt, but in the implementation of the pixbuf producer...
249 if ( *buffer != NULL )
250 {
251 // Clone the image and the alpha
252 uint8_t *image_copy = mlt_pool_alloc( image_size );
253 uint8_t *alpha_copy = mlt_pool_alloc( alpha_size );
254
255 memcpy( image_copy, *buffer, image_size );
256
257 // Copy or default the alpha
258 if ( alpha != NULL )
259 memcpy( alpha_copy, alpha, alpha_size );
260 else
261 memset( alpha_copy, 255, alpha_size );
262
263 // Now update properties so we free the copy after
264 mlt_properties_set_data( properties, "image", image_copy, image_size, mlt_pool_release, NULL );
265 mlt_properties_set_data( properties, "alpha", alpha_copy, alpha_size, mlt_pool_release, NULL );
266
267 // We're going to pass the copy on
268 *buffer = image_copy;
269 }
270 else
271 {
272 // TODO: Review all cases of invalid images
273 *buffer = mlt_pool_alloc( 50 * 50 * 2 );
274 mlt_properties_set_data( properties, "image", *buffer, image_size, mlt_pool_release, NULL );
275 *width = 50;
276 *height = 50;
277 }
278
279 return 0;
280 }
281
282 static uint8_t *producer_get_alpha_mask( mlt_frame this )
283 {
284 // Obtain properties of frame
285 mlt_properties properties = MLT_FRAME_PROPERTIES( this );
286
287 // Return the alpha mask
288 return mlt_properties_get_data( properties, "alpha", NULL );
289 }
290
291 static int producer_get_frame( mlt_producer producer, mlt_frame_ptr frame, int index )
292 {
293 // Get the real structure for this producer
294 producer_pixbuf this = producer->child;
295
296 // Fetch the producers properties
297 mlt_properties producer_properties = MLT_PRODUCER_PROPERTIES( producer );
298
299 if ( this->count == 0 && mlt_properties_get( producer_properties, "resource" ) != NULL )
300 {
301 char *filename = mlt_properties_get( producer_properties, "resource" );
302
303 // Read xml string
304 if ( strstr( filename, "<svg" ) )
305 {
306 // Generate a temporary file for the svg
307 char fullname[ 1024 ] = "/tmp/mlt.XXXXXX";
308 int fd = mkstemp( fullname );
309
310 if ( fd > -1 )
311 {
312 // Write the svg into the temp file
313 ssize_t remaining_bytes;
314 char *xml = filename;
315
316 // Strip leading crap
317 while ( xml[0] != '<' )
318 xml++;
319
320 remaining_bytes = strlen( xml );
321 while ( remaining_bytes > 0 )
322 remaining_bytes -= write( fd, xml + strlen( xml ) - remaining_bytes, remaining_bytes );
323 close( fd );
324
325 this->filenames = realloc( this->filenames, sizeof( char * ) * ( this->count + 1 ) );
326 this->filenames[ this->count ++ ] = strdup( fullname );
327
328 // Teehe - when the producer closes, delete the temp file and the space allo
329 mlt_properties_set_data( producer_properties, "__temporary_file__", this->filenames[ this->count - 1 ], 0, ( mlt_destructor )unlink, NULL );
330 }
331 }
332 // Obtain filenames
333 else if ( strchr( filename, '%' ) != NULL )
334 {
335 // handle picture sequences
336 int i = mlt_properties_get_int( producer_properties, "begin" );
337 int gap = 0;
338 char full[1024];
339
340 while ( gap < 100 )
341 {
342 struct stat buf;
343 snprintf( full, 1023, filename, i ++ );
344 if ( stat( full, &buf ) == 0 )
345 {
346 this->filenames = realloc( this->filenames, sizeof( char * ) * ( this->count + 1 ) );
347 this->filenames[ this->count ++ ] = strdup( full );
348 gap = 0;
349 }
350 else
351 {
352 gap ++;
353 }
354 }
355 }
356 else if ( strstr( filename, "/.all." ) != NULL )
357 {
358 char *dir_name = strdup( filename );
359 char *extension = strrchr( filename, '.' );
360 *( strstr( dir_name, "/.all." ) + 1 ) = '\0';
361 char fullname[ 1024 ];
362 strcpy( fullname, dir_name );
363 struct dirent **de = NULL;
364 int n = scandir( fullname, &de, filter_files, alphasort );
365 int i;
366 struct stat info;
367
368 for (i = 0; i < n; i++ )
369 {
370 snprintf( fullname, 1023, "%s%s", dir_name, de[i]->d_name );
371
372 if ( strstr( fullname, extension ) && lstat( fullname, &info ) == 0 &&
373 ( S_ISREG( info.st_mode ) || info.st_mode | S_IXUSR ) )
374 {
375 this->filenames = realloc( this->filenames, sizeof( char * ) * ( this->count + 1 ) );
376 this->filenames[ this->count ++ ] = strdup( fullname );
377 }
378 free( de[ i ] );
379 }
380
381 free( de );
382 free( dir_name );
383 }
384 else
385 {
386 this->filenames = realloc( this->filenames, sizeof( char * ) * ( this->count + 1 ) );
387 this->filenames[ this->count ++ ] = strdup( filename );
388 }
389 }
390
391 // Generate a frame
392 *frame = mlt_frame_init( );
393
394 if ( *frame != NULL && this->count > 0 )
395 {
396 // Obtain properties of frame and producer
397 mlt_properties properties = MLT_FRAME_PROPERTIES( *frame );
398
399 // Set the producer on the frame properties
400 mlt_properties_set_data( properties, "producer_pixbuf", this, 0, NULL, NULL );
401
402 // Update timecode on the frame we're creating
403 mlt_frame_set_position( *frame, mlt_producer_position( producer ) );
404
405 // Ensure that we have a way to obtain the position in the get_image
406 mlt_properties_set_position( properties, "pixbuf_position", mlt_producer_position( producer ) );
407
408 // Refresh the image
409 refresh_image( *frame, 0, 0 );
410
411 // Set producer-specific frame properties
412 mlt_properties_set_int( properties, "progressive", mlt_properties_get_int( producer_properties, "progressive" ) );
413 mlt_properties_set_double( properties, "aspect_ratio", mlt_properties_get_double( producer_properties, "aspect_ratio" ) );
414
415 // Set alpha call back
416 ( *frame )->get_alpha_mask = producer_get_alpha_mask;
417
418 // Push the get_image method
419 mlt_frame_push_get_image( *frame, producer_get_image );
420 }
421
422 // Calculate the next timecode
423 mlt_producer_prepare_next( producer );
424
425 return 0;
426 }
427
428 static void producer_close( mlt_producer parent )
429 {
430 producer_pixbuf this = parent->child;
431 mlt_pool_release( this->image );
432 parent->close = NULL;
433 mlt_producer_close( parent );
434 while ( this->count -- )
435 free( this->filenames[ this->count ] );
436 free( this->filenames );
437 free( this );
438 }
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