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 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.
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.
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.
21 #include "producer_pixbuf.h"
22 #include <framework/mlt_frame.h>
23 #include <gdk-pixbuf/gdk-pixbuf.h>
29 #include <sys/types.h>
33 static int producer_get_frame( mlt_producer parent
, mlt_frame_ptr frame
, int index
);
34 static void producer_close( mlt_producer parent
);
42 mlt_producer
producer_pixbuf_init( const char *filename
)
44 producer_pixbuf
this = calloc( sizeof( struct producer_pixbuf_s
), 1 );
45 if ( this != NULL
&& mlt_producer_init( &this->parent
, this ) == 0 )
47 mlt_producer producer
= &this->parent
;
49 producer
->get_frame
= producer_get_frame
;
50 producer
->close
= producer_close
;
52 // Get the properties interface
53 mlt_properties properties
= mlt_producer_properties( &this->parent
);
55 // Set the default properties
56 mlt_properties_set_int( properties
, "video_standard", mlt_video_standard_pal
);
57 mlt_properties_set_double( properties
, "ttl", 5 );
60 if ( strchr( filename
, '%' ) != NULL
)
62 // handle picture sequences
70 snprintf( full
, 1023, filename
, i
++ );
71 if ( stat( full
, &buf
) == 0 )
73 this->filenames
= realloc( this->filenames
, sizeof( char * ) * ( this->count
+ 1 ) );
74 this->filenames
[ this->count
++ ] = strdup( full
);
85 this->filenames
= realloc( this->filenames
, sizeof( char * ) * ( this->count
+ 1 ) );
86 this->filenames
[ this->count
++ ] = strdup( filename
);
89 // Initialise gobject types
98 static int producer_get_image( mlt_frame
this, uint8_t **buffer
, mlt_image_format
*format
, int *width
, int *height
, int writable
)
100 // Obtain properties of frame
101 mlt_properties properties
= mlt_frame_properties( this );
103 // May need to know the size of the image to clone it
107 uint8_t *image
= mlt_properties_get_data( properties
, "image", &size
);
109 // Get width and height
110 *width
= mlt_properties_get_int( properties
, "width" );
111 *height
= mlt_properties_get_int( properties
, "height" );
113 // Clone if necessary
117 uint8_t *copy
= malloc( size
);
118 memcpy( copy
, image
, size
);
120 // We're going to pass the copy on
123 // Now update properties so we free the copy after
124 mlt_properties_set_data( properties
, "image", copy
, size
, free
, NULL
);
133 static uint8_t *producer_get_alpha_mask( mlt_frame
this )
135 // Obtain properties of frame
136 mlt_properties properties
= mlt_frame_properties( this );
138 // Return the alpha mask
139 return mlt_properties_get_data( properties
, "alpha", NULL
);
142 static int producer_get_frame( mlt_producer producer
, mlt_frame_ptr frame
, int index
)
144 producer_pixbuf
this = producer
->child
;
145 GdkPixbuf
*pixbuf
= NULL
;
146 GError
*error
= NULL
;
149 *frame
= mlt_frame_init( );
151 // Obtain properties of frame
152 mlt_properties properties
= mlt_frame_properties( *frame
);
154 // Get the time to live for each frame
155 double ttl
= mlt_properties_get_double( mlt_producer_properties( producer
), "ttl" );
158 int image_idx
= ( int )floor( mlt_producer_position( producer
) / ttl
) % this->count
;
160 // Update timecode on the frame we're creating
161 mlt_frame_set_timecode( *frame
, mlt_producer_position( producer
) );
163 // optimization for subsequent iterations on single picture
164 if ( this->image
!= NULL
&& image_idx
== this->image_idx
)
167 mlt_properties_set_int( properties
, "width", this->width
);
168 mlt_properties_set_int( properties
, "height", this->height
);
170 // if picture sequence pass the image and alpha data without destructor
171 mlt_properties_set_data( properties
, "image", this->image
, 0, NULL
, NULL
);
172 mlt_properties_set_data( properties
, "alpha", this->alpha
, 0, NULL
, NULL
);
174 // Set alpha mask call back
175 ( *frame
)->get_alpha_mask
= producer_get_alpha_mask
;
177 // Stack the get image callback
178 mlt_frame_push_get_image( *frame
, producer_get_image
);
185 this->image_idx
= image_idx
;
186 pixbuf
= gdk_pixbuf_new_from_file( this->filenames
[ image_idx
], &error
);
189 // If we have a pixbuf
192 // Scale to adjust for sample aspect ratio
193 if ( mlt_properties_get_int( properties
, "video_standard" ) == mlt_video_standard_pal
)
195 GdkPixbuf
*temp
= pixbuf
;
196 GdkPixbuf
*scaled
= gdk_pixbuf_scale_simple( pixbuf
,
197 (gint
) ( (float) gdk_pixbuf_get_width( pixbuf
) * 54.0/59.0),
198 gdk_pixbuf_get_height( pixbuf
), GDK_INTERP_HYPER
);
200 g_object_unref( temp
);
204 GdkPixbuf
*temp
= pixbuf
;
205 GdkPixbuf
*scaled
= gdk_pixbuf_scale_simple( pixbuf
,
206 (gint
) ( (float) gdk_pixbuf_get_width( pixbuf
) * 11.0/10.0 ),
207 gdk_pixbuf_get_height( pixbuf
), GDK_INTERP_HYPER
);
209 g_object_unref( temp
);
212 // Store width and height
213 this->width
= gdk_pixbuf_get_width( pixbuf
);
214 this->height
= gdk_pixbuf_get_height( pixbuf
);
216 // Allocate/define image and alpha
217 uint8_t *image
= malloc( this->width
* this->height
* 2 );
218 uint8_t *alpha
= NULL
;
220 // Extract YUV422 and alpha
221 if ( gdk_pixbuf_get_has_alpha( pixbuf
) )
223 // Allocate the alpha mask
224 alpha
= malloc( this->width
* this->height
);
227 mlt_convert_rgb24a_to_yuv422( gdk_pixbuf_get_pixels( pixbuf
),
228 this->width
, this->height
,
229 gdk_pixbuf_get_rowstride( pixbuf
),
234 // No alpha to extract
235 mlt_convert_rgb24_to_yuv422( gdk_pixbuf_get_pixels( pixbuf
),
236 this->width
, this->height
,
237 gdk_pixbuf_get_rowstride( pixbuf
),
241 // Finished with pixbuf now
242 g_object_unref( pixbuf
);
244 // Set width/height of frame
245 mlt_properties_set_int( properties
, "width", this->width
);
246 mlt_properties_set_int( properties
, "height", this->height
);
248 // Pass alpha and image on properties with or without destructor
252 // pass the image and alpha data without destructor
253 mlt_properties_set_data( properties
, "image", image
, 0, NULL
, NULL
);
254 mlt_properties_set_data( properties
, "alpha", alpha
, 0, NULL
, NULL
);
256 // Set alpha call back
257 ( *frame
)->get_alpha_mask
= producer_get_alpha_mask
;
259 // Push the get_image method
260 mlt_frame_push_get_image( *frame
, producer_get_image
);
263 // Calculate the next timecode
264 mlt_producer_prepare_next( producer
);
269 static void producer_close( mlt_producer parent
)
271 producer_pixbuf
this = parent
->child
;
276 parent
->close
= NULL
;
277 mlt_producer_close( parent
);