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