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[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 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_properties_set_data( producer_props, "pixbuf", pixbuf, 0, ( mlt_destructor )g_object_unref, NULL );
146 g_object_ref( pixbuf );
147 mlt_properties_set_data( MLT_FRAME_PROPERTIES( frame ), "pixbuf", pixbuf, 0, ( mlt_destructor )g_object_unref, NULL );
148
149 mlt_properties_set_int( producer_props, "real_width", gdk_pixbuf_get_width( pixbuf ) );
150 mlt_properties_set_int( producer_props, "real_height", gdk_pixbuf_get_height( pixbuf ) );
151
152 // Store the width/height of the pixbuf temporarily
153 this->width = gdk_pixbuf_get_width( pixbuf );
154 this->height = gdk_pixbuf_get_height( pixbuf );
155 }
156 }
157
158 // If we have a pixbuf
159 if ( pixbuf && width > 0 )
160 {
161 char *interps = mlt_properties_get( properties, "rescale.interp" );
162 int interp = GDK_INTERP_BILINEAR;
163
164 if ( strcmp( interps, "nearest" ) == 0 )
165 interp = GDK_INTERP_NEAREST;
166 else if ( strcmp( interps, "tiles" ) == 0 )
167 interp = GDK_INTERP_TILES;
168 else if ( strcmp( interps, "hyper" ) == 0 )
169 interp = GDK_INTERP_HYPER;
170
171 // Note - the original pixbuf is already safe and ready for destruction
172 pixbuf = gdk_pixbuf_scale_simple( pixbuf, width, height, interp );
173
174 // Store width and height
175 this->width = width;
176 this->height = height;
177
178 // Allocate/define image
179 this->image = mlt_pool_alloc( width * ( height + 1 ) * 2 );
180
181 // Extract YUV422 and alpha
182 if ( gdk_pixbuf_get_has_alpha( pixbuf ) )
183 {
184 // Allocate the alpha mask
185 this->alpha = mlt_pool_alloc( this->width * this->height );
186
187 // Convert the image
188 mlt_convert_rgb24a_to_yuv422( gdk_pixbuf_get_pixels( pixbuf ),
189 this->width, this->height,
190 gdk_pixbuf_get_rowstride( pixbuf ),
191 this->image, this->alpha );
192 }
193 else
194 {
195 // No alpha to extract
196 mlt_convert_rgb24_to_yuv422( gdk_pixbuf_get_pixels( pixbuf ),
197 this->width, this->height,
198 gdk_pixbuf_get_rowstride( pixbuf ),
199 this->image );
200 }
201
202 // Finished with pixbuf now
203 g_object_unref( pixbuf );
204 }
205
206 // Set width/height of frame
207 mlt_properties_set_int( properties, "width", this->width );
208 mlt_properties_set_int( properties, "height", this->height );
209 mlt_properties_set_int( properties, "real_width", mlt_properties_get_int( producer_props, "real_width" ) );
210 mlt_properties_set_int( properties, "real_height", mlt_properties_get_int( producer_props, "real_height" ) );
211
212 // pass the image data without destructor
213 mlt_properties_set_data( properties, "image", this->image, this->width * ( this->height + 1 ) * 2, NULL, NULL );
214 mlt_properties_set_data( properties, "alpha", this->alpha, this->width * this->height, NULL, NULL );
215
216 pthread_mutex_unlock( &fastmutex );
217 }
218
219 static int producer_get_image( mlt_frame frame, uint8_t **buffer, mlt_image_format *format, int *width, int *height, int writable )
220 {
221 // Obtain properties of frame
222 mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
223
224 // We need to know the size of the image to clone it
225 int image_size = 0;
226 int alpha_size = 0;
227
228 // Alpha channel
229 uint8_t *alpha = NULL;
230
231 *width = mlt_properties_get_int( properties, "rescale_width" );
232 *height = mlt_properties_get_int( properties, "rescale_height" );
233
234 // Refresh the image
235 refresh_image( frame, *width, *height );
236
237 // Get the image
238 *buffer = mlt_properties_get_data( properties, "image", &image_size );
239 alpha = mlt_properties_get_data( properties, "alpha", &alpha_size );
240
241 // Get width and height (may have changed during the refresh)
242 *width = mlt_properties_get_int( properties, "width" );
243 *height = mlt_properties_get_int( properties, "height" );
244
245 // NB: Cloning is necessary with this producer (due to processing of images ahead of use)
246 // The fault is not in the design of mlt, but in the implementation of the pixbuf producer...
247 if ( *buffer != NULL )
248 {
249 // Clone the image and the alpha
250 uint8_t *image_copy = mlt_pool_alloc( image_size );
251 uint8_t *alpha_copy = mlt_pool_alloc( alpha_size );
252
253 memcpy( image_copy, *buffer, image_size );
254
255 // Copy or default the alpha
256 if ( alpha != NULL )
257 memcpy( alpha_copy, alpha, alpha_size );
258 else
259 memset( alpha_copy, 255, alpha_size );
260
261 // Now update properties so we free the copy after
262 mlt_properties_set_data( properties, "image", image_copy, image_size, mlt_pool_release, NULL );
263 mlt_properties_set_data( properties, "alpha", alpha_copy, alpha_size, mlt_pool_release, NULL );
264
265 // We're going to pass the copy on
266 *buffer = image_copy;
267 }
268 else
269 {
270 // TODO: Review all cases of invalid images
271 *buffer = mlt_pool_alloc( 50 * 50 * 2 );
272 mlt_properties_set_data( properties, "image", *buffer, image_size, mlt_pool_release, NULL );
273 *width = 50;
274 *height = 50;
275 }
276
277 return 0;
278 }
279
280 static uint8_t *producer_get_alpha_mask( mlt_frame this )
281 {
282 // Obtain properties of frame
283 mlt_properties properties = MLT_FRAME_PROPERTIES( this );
284
285 // Return the alpha mask
286 return mlt_properties_get_data( properties, "alpha", NULL );
287 }
288
289 static int producer_get_frame( mlt_producer producer, mlt_frame_ptr frame, int index )
290 {
291 // Get the real structure for this producer
292 producer_pixbuf this = producer->child;
293
294 // Fetch the producers properties
295 mlt_properties producer_properties = MLT_PRODUCER_PROPERTIES( producer );
296
297 if ( this->count == 0 && mlt_properties_get( producer_properties, "resource" ) != NULL )
298 {
299 char *filename = mlt_properties_get( producer_properties, "resource" );
300
301 // Read xml string
302 if ( strstr( filename, "<svg" ) )
303 {
304 // Generate a temporary file for the svg
305 char fullname[ 1024 ] = "/tmp/mlt.XXXXXX";
306 int fd = mkstemp( fullname );
307
308 if ( fd > -1 )
309 {
310 // Write the svg into the temp file
311 ssize_t remaining_bytes;
312 char *xml = filename;
313
314 // Strip leading crap
315 while ( xml[0] != '<' )
316 xml++;
317
318 remaining_bytes = strlen( xml );
319 while ( remaining_bytes > 0 )
320 remaining_bytes -= write( fd, xml + strlen( xml ) - remaining_bytes, remaining_bytes );
321 close( fd );
322
323 this->filenames = realloc( this->filenames, sizeof( char * ) * ( this->count + 1 ) );
324 this->filenames[ this->count ++ ] = strdup( fullname );
325
326 // Teehe - when the producer closes, delete the temp file and the space allo
327 mlt_properties_set_data( producer_properties, "__temporary_file__", this->filenames[ this->count - 1 ], 0, ( mlt_destructor )unlink, NULL );
328 }
329 }
330 // Obtain filenames
331 else if ( strchr( filename, '%' ) != NULL )
332 {
333 // handle picture sequences
334 int i = mlt_properties_get_int( producer_properties, "begin" );
335 int gap = 0;
336 char full[1024];
337
338 while ( gap < 100 )
339 {
340 struct stat buf;
341 snprintf( full, 1023, filename, i ++ );
342 if ( stat( full, &buf ) == 0 )
343 {
344 this->filenames = realloc( this->filenames, sizeof( char * ) * ( this->count + 1 ) );
345 this->filenames[ this->count ++ ] = strdup( full );
346 gap = 0;
347 }
348 else
349 {
350 gap ++;
351 }
352 }
353 }
354 else if ( strstr( filename, "/.all." ) != NULL )
355 {
356 char *dir_name = strdup( filename );
357 char *extension = strrchr( filename, '.' );
358 *( strstr( dir_name, "/.all." ) + 1 ) = '\0';
359 char fullname[ 1024 ];
360 strcpy( fullname, dir_name );
361 struct dirent **de = NULL;
362 int n = scandir( fullname, &de, filter_files, alphasort );
363 int i;
364 struct stat info;
365
366 for (i = 0; i < n; i++ )
367 {
368 snprintf( fullname, 1023, "%s%s", dir_name, de[i]->d_name );
369
370 if ( strstr( fullname, extension ) && lstat( fullname, &info ) == 0 &&
371 ( S_ISREG( info.st_mode ) || info.st_mode | S_IXUSR ) )
372 {
373 this->filenames = realloc( this->filenames, sizeof( char * ) * ( this->count + 1 ) );
374 this->filenames[ this->count ++ ] = strdup( fullname );
375 }
376 free( de[ i ] );
377 }
378
379 free( de );
380 free( dir_name );
381 }
382 else
383 {
384 this->filenames = realloc( this->filenames, sizeof( char * ) * ( this->count + 1 ) );
385 this->filenames[ this->count ++ ] = strdup( filename );
386 }
387 }
388
389 // Generate a frame
390 *frame = mlt_frame_init( );
391
392 if ( *frame != NULL && this->count > 0 )
393 {
394 // Obtain properties of frame and producer
395 mlt_properties properties = MLT_FRAME_PROPERTIES( *frame );
396
397 // Set the producer on the frame properties
398 mlt_properties_set_data( properties, "producer_pixbuf", this, 0, NULL, NULL );
399
400 // Update timecode on the frame we're creating
401 mlt_frame_set_position( *frame, mlt_producer_position( producer ) );
402
403 // Ensure that we have a way to obtain the position in the get_image
404 mlt_properties_set_position( properties, "pixbuf_position", mlt_producer_position( producer ) );
405
406 // Refresh the image
407 refresh_image( *frame, 0, 0 );
408
409 // Set producer-specific frame properties
410 mlt_properties_set_int( properties, "progressive", mlt_properties_get_int( producer_properties, "progressive" ) );
411 mlt_properties_set_double( properties, "aspect_ratio", mlt_properties_get_double( producer_properties, "aspect_ratio" ) );
412
413 // Set alpha call back
414 ( *frame )->get_alpha_mask = producer_get_alpha_mask;
415
416 // Push the get_image method
417 mlt_frame_push_get_image( *frame, producer_get_image );
418 }
419
420 // Calculate the next timecode
421 mlt_producer_prepare_next( producer );
422
423 return 0;
424 }
425
426 static void producer_close( mlt_producer parent )
427 {
428 producer_pixbuf this = parent->child;
429 mlt_pool_release( this->image );
430 parent->close = NULL;
431 mlt_producer_close( parent );
432 while ( this->count -- )
433 free( this->filenames[ this->count ] );
434 free( this->filenames );
435 free( this );
436 }
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