3 * producer_pixbuf.c -- raster image loader based upon gdk-pixbuf
4 * Copyright (C) 2003-2004 Ushodaya Enterprises Limited
5 * Author: Dan Dennedy <dan@dennedy.org>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software Foundation,
19 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
22 #include "producer_pixbuf.h"
23 #include <framework/mlt_frame.h>
24 #include <gdk-pixbuf/gdk-pixbuf.h>
31 #include <sys/types.h>
36 static pthread_mutex_t fastmutex
= PTHREAD_MUTEX_INITIALIZER
;
38 typedef struct producer_pixbuf_s
*producer_pixbuf
;
40 struct producer_pixbuf_s
42 struct mlt_producer_s parent
;
45 mlt_properties filenames
;
55 static int producer_get_frame( mlt_producer parent
, mlt_frame_ptr frame
, int index
);
56 static void producer_close( mlt_producer parent
);
58 mlt_producer
producer_pixbuf_init( char *filename
)
60 producer_pixbuf
this = calloc( sizeof( struct producer_pixbuf_s
), 1 );
61 if ( this != NULL
&& mlt_producer_init( &this->parent
, this ) == 0 )
63 mlt_producer producer
= &this->parent
;
65 // Get the properties interface
66 mlt_properties properties
= MLT_PRODUCER_PROPERTIES( &this->parent
);
68 // Callback registration
69 producer
->get_frame
= producer_get_frame
;
70 producer
->close
= ( mlt_destructor
)producer_close
;
72 // Set the default properties
73 mlt_properties_set( properties
, "resource", filename
);
74 mlt_properties_set_int( properties
, "ttl", 25 );
75 mlt_properties_set_int( properties
, "aspect_ratio", 1 );
76 mlt_properties_set_int( properties
, "progressive", 1 );
84 static void refresh_image( mlt_frame frame
, int width
, int height
)
87 GdkPixbuf
*pixbuf
= mlt_properties_get_data( MLT_FRAME_PROPERTIES( frame
), "pixbuf", NULL
);
90 // Obtain properties of frame
91 mlt_properties properties
= MLT_FRAME_PROPERTIES( frame
);
93 // Obtain the producer for this frame
94 producer_pixbuf
this = mlt_properties_get_data( properties
, "producer_pixbuf", NULL
);
96 // Obtain the producer
97 mlt_producer producer
= &this->parent
;
99 // Obtain properties of producer
100 mlt_properties producer_props
= MLT_PRODUCER_PROPERTIES( producer
);
102 // Get the time to live for each frame
103 double ttl
= mlt_properties_get_int( producer_props
, "ttl" );
105 // Get the original position of this frame
106 mlt_position position
= mlt_properties_get_position( properties
, "pixbuf_position" );
109 int image_idx
= ( int )floor( ( double )position
/ ttl
) % this->count
;
111 pthread_mutex_lock( &fastmutex
);
113 // optimization for subsequent iterations on single picture
114 if ( width
!= 0 && this->image
!= NULL
&& image_idx
== this->image_idx
)
116 if ( width
!= this->width
|| height
!= this->height
)
118 pixbuf
= mlt_properties_get_data( producer_props
, "_pixbuf", NULL
);
119 mlt_pool_release( this->image
);
120 mlt_pool_release( this->alpha
);
125 else if ( pixbuf
== NULL
&& ( this->image
== NULL
|| image_idx
!= this->image_idx
) )
127 mlt_pool_release( this->image
);
128 mlt_pool_release( this->alpha
);
132 this->image_idx
= image_idx
;
133 pixbuf
= gdk_pixbuf_new_from_file( mlt_properties_get_value( this->filenames
, image_idx
), &error
);
135 if ( pixbuf
!= NULL
)
137 // Register this pixbuf for destruction and reuse
138 mlt_events_block( producer_props
, NULL
);
139 mlt_properties_set_data( producer_props
, "_pixbuf", pixbuf
, 0, ( mlt_destructor
)g_object_unref
, NULL
);
140 g_object_ref( pixbuf
);
141 mlt_properties_set_data( MLT_FRAME_PROPERTIES( frame
), "pixbuf", pixbuf
, 0, ( mlt_destructor
)g_object_unref
, NULL
);
143 mlt_properties_set_int( producer_props
, "_real_width", gdk_pixbuf_get_width( pixbuf
) );
144 mlt_properties_set_int( producer_props
, "_real_height", gdk_pixbuf_get_height( pixbuf
) );
145 mlt_events_unblock( producer_props
, NULL
);
147 // Store the width/height of the pixbuf temporarily
148 this->width
= gdk_pixbuf_get_width( pixbuf
);
149 this->height
= gdk_pixbuf_get_height( pixbuf
);
153 // If we have a pixbuf
154 if ( pixbuf
&& width
> 0 )
156 char *interps
= mlt_properties_get( properties
, "rescale.interp" );
157 int interp
= GDK_INTERP_BILINEAR
;
159 if ( strcmp( interps
, "nearest" ) == 0 )
160 interp
= GDK_INTERP_NEAREST
;
161 else if ( strcmp( interps
, "tiles" ) == 0 )
162 interp
= GDK_INTERP_TILES
;
163 else if ( strcmp( interps
, "hyper" ) == 0 )
164 interp
= GDK_INTERP_HYPER
;
166 // Note - the original pixbuf is already safe and ready for destruction
167 pixbuf
= gdk_pixbuf_scale_simple( pixbuf
, width
, height
, interp
);
169 // Store width and height
171 this->height
= height
;
173 // Allocate/define image
174 this->image
= mlt_pool_alloc( width
* ( height
+ 1 ) * 2 );
176 // Extract YUV422 and alpha
177 if ( gdk_pixbuf_get_has_alpha( pixbuf
) )
179 // Allocate the alpha mask
180 this->alpha
= mlt_pool_alloc( this->width
* this->height
);
183 mlt_convert_rgb24a_to_yuv422( gdk_pixbuf_get_pixels( pixbuf
),
184 this->width
, this->height
,
185 gdk_pixbuf_get_rowstride( pixbuf
),
186 this->image
, this->alpha
);
190 // No alpha to extract
191 mlt_convert_rgb24_to_yuv422( gdk_pixbuf_get_pixels( pixbuf
),
192 this->width
, this->height
,
193 gdk_pixbuf_get_rowstride( pixbuf
),
197 // Finished with pixbuf now
198 g_object_unref( pixbuf
);
201 // Set width/height of frame
202 mlt_properties_set_int( properties
, "width", this->width
);
203 mlt_properties_set_int( properties
, "height", this->height
);
204 mlt_properties_set_int( properties
, "real_width", mlt_properties_get_int( producer_props
, "_real_width" ) );
205 mlt_properties_set_int( properties
, "real_height", mlt_properties_get_int( producer_props
, "_real_height" ) );
207 // pass the image data without destructor
208 mlt_properties_set_data( properties
, "image", this->image
, this->width
* ( this->height
+ 1 ) * 2, NULL
, NULL
);
209 mlt_properties_set_data( properties
, "alpha", this->alpha
, this->width
* this->height
, NULL
, NULL
);
211 pthread_mutex_unlock( &fastmutex
);
214 static int producer_get_image( mlt_frame frame
, uint8_t **buffer
, mlt_image_format
*format
, int *width
, int *height
, int writable
)
216 // Obtain properties of frame
217 mlt_properties properties
= MLT_FRAME_PROPERTIES( frame
);
219 // We need to know the size of the image to clone it
224 uint8_t *alpha
= NULL
;
226 *width
= mlt_properties_get_int( properties
, "rescale_width" );
227 *height
= mlt_properties_get_int( properties
, "rescale_height" );
230 refresh_image( frame
, *width
, *height
);
233 *buffer
= mlt_properties_get_data( properties
, "image", &image_size
);
234 alpha
= mlt_properties_get_data( properties
, "alpha", &alpha_size
);
236 // Get width and height (may have changed during the refresh)
237 *width
= mlt_properties_get_int( properties
, "width" );
238 *height
= mlt_properties_get_int( properties
, "height" );
240 // NB: Cloning is necessary with this producer (due to processing of images ahead of use)
241 // The fault is not in the design of mlt, but in the implementation of the pixbuf producer...
242 if ( *buffer
!= NULL
)
244 // Clone the image and the alpha
245 uint8_t *image_copy
= mlt_pool_alloc( image_size
);
246 uint8_t *alpha_copy
= mlt_pool_alloc( alpha_size
);
248 memcpy( image_copy
, *buffer
, image_size
);
250 // Copy or default the alpha
252 memcpy( alpha_copy
, alpha
, alpha_size
);
254 memset( alpha_copy
, 255, alpha_size
);
256 // Now update properties so we free the copy after
257 mlt_properties_set_data( properties
, "image", image_copy
, image_size
, mlt_pool_release
, NULL
);
258 mlt_properties_set_data( properties
, "alpha", alpha_copy
, alpha_size
, mlt_pool_release
, NULL
);
260 // We're going to pass the copy on
261 *buffer
= image_copy
;
265 // TODO: Review all cases of invalid images
266 *buffer
= mlt_pool_alloc( 50 * 50 * 2 );
267 mlt_properties_set_data( properties
, "image", *buffer
, image_size
, mlt_pool_release
, NULL
);
275 static uint8_t *producer_get_alpha_mask( mlt_frame
this )
277 // Obtain properties of frame
278 mlt_properties properties
= MLT_FRAME_PROPERTIES( this );
280 // Return the alpha mask
281 return mlt_properties_get_data( properties
, "alpha", NULL
);
284 static int producer_get_frame( mlt_producer producer
, mlt_frame_ptr frame
, int index
)
286 // Get the real structure for this producer
287 producer_pixbuf
this = producer
->child
;
289 // Fetch the producers properties
290 mlt_properties producer_properties
= MLT_PRODUCER_PROPERTIES( producer
);
292 if ( this->filenames
== NULL
&& mlt_properties_get( producer_properties
, "resource" ) != NULL
)
294 char *filename
= mlt_properties_get( producer_properties
, "resource" );
295 this->filenames
= mlt_properties_new( );
298 if ( strstr( filename
, "<svg" ) )
300 // Generate a temporary file for the svg
301 char fullname
[ 1024 ] = "/tmp/mlt.XXXXXX";
302 int fd
= mkstemp( fullname
);
306 // Write the svg into the temp file
307 ssize_t remaining_bytes
;
308 char *xml
= filename
;
310 // Strip leading crap
311 while ( xml
[0] != '<' )
314 remaining_bytes
= strlen( xml
);
315 while ( remaining_bytes
> 0 )
316 remaining_bytes
-= write( fd
, xml
+ strlen( xml
) - remaining_bytes
, remaining_bytes
);
319 mlt_properties_set( this->filenames
, "0", fullname
);
321 // Teehe - when the producer closes, delete the temp file and the space allo
322 mlt_properties_set_data( producer_properties
, "__temporary_file__", fullname
, 0, ( mlt_destructor
)unlink
, NULL
);
326 else if ( strchr( filename
, '%' ) != NULL
)
328 // handle picture sequences
329 int i
= mlt_properties_get_int( producer_properties
, "begin" );
338 snprintf( full
, 1023, filename
, i
++ );
339 if ( stat( full
, &buf
) == 0 )
341 sprintf( key
, "%d", keyvalue
++ );
342 mlt_properties_set( this->filenames
, "0", full
);
351 else if ( strstr( filename
, "/.all." ) != NULL
)
353 char wildcard
[ 1024 ];
354 char *dir_name
= strdup( filename
);
355 char *extension
= strrchr( dir_name
, '.' );
357 *( strstr( dir_name
, "/.all." ) + 1 ) = '\0';
358 sprintf( wildcard
, "*%s", extension
);
360 mlt_properties_dir_list( this->filenames
, dir_name
, wildcard
, 1 );
366 mlt_properties_set( this->filenames
, "0", filename
);
369 this->count
= mlt_properties_count( this->filenames
);
373 *frame
= mlt_frame_init( );
375 if ( *frame
!= NULL
&& this->count
> 0 )
377 // Obtain properties of frame and producer
378 mlt_properties properties
= MLT_FRAME_PROPERTIES( *frame
);
380 // Set the producer on the frame properties
381 mlt_properties_set_data( properties
, "producer_pixbuf", this, 0, NULL
, NULL
);
383 // Update timecode on the frame we're creating
384 mlt_frame_set_position( *frame
, mlt_producer_position( producer
) );
386 // Ensure that we have a way to obtain the position in the get_image
387 mlt_properties_set_position( properties
, "pixbuf_position", mlt_producer_position( producer
) );
390 refresh_image( *frame
, 0, 0 );
392 // Set producer-specific frame properties
393 mlt_properties_set_int( properties
, "progressive", mlt_properties_get_int( producer_properties
, "progressive" ) );
394 mlt_properties_set_double( properties
, "aspect_ratio", mlt_properties_get_double( producer_properties
, "aspect_ratio" ) );
396 // Set alpha call back
397 ( *frame
)->get_alpha_mask
= producer_get_alpha_mask
;
399 // Push the get_image method
400 mlt_frame_push_get_image( *frame
, producer_get_image
);
403 // Calculate the next timecode
404 mlt_producer_prepare_next( producer
);
409 static void producer_close( mlt_producer parent
)
411 producer_pixbuf
this = parent
->child
;
412 mlt_pool_release( this->image
);
413 mlt_pool_release( this->alpha
);
414 parent
->close
= NULL
;
415 mlt_producer_close( parent
);
416 mlt_properties_close( this->filenames
);