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>
26 #include <gdk-pixbuf/gdk-pixbuf.h>
28 static int producer_get_frame( mlt_producer parent
, mlt_frame_ptr frame
, int index
);
29 static void producer_close( mlt_producer parent
);
31 mlt_producer
producer_pixbuf_init( const char *filename
)
33 producer_pixbuf
this = calloc( sizeof( struct producer_pixbuf_s
), 1 );
34 if ( this != NULL
&& mlt_producer_init( &this->parent
, this ) == 0 )
36 mlt_producer producer
= &this->parent
;
38 producer
->get_frame
= producer_get_frame
;
39 producer
->close
= producer_close
;
41 this->filename
= strdup( filename
);
52 static int producer_get_image( mlt_frame
this, uint8_t **buffer
, mlt_image_format
*format
, int *width
, int *height
, int writable
)
54 // Obtain properties of frame
55 mlt_properties properties
= mlt_frame_properties( this );
57 // May need to know the size of the image to clone it
61 uint8_t *image
= mlt_properties_get_data( properties
, "image", &size
);
63 // Get width and height
64 *width
= mlt_properties_get_int( properties
, "width" );
65 *height
= mlt_properties_get_int( properties
, "height" );
71 uint8_t *copy
= malloc( size
);
72 memcpy( copy
, image
, size
);
74 // We're going to pass the copy on
77 // Now update properties so we free the copy after
78 mlt_properties_set_data( properties
, "image", copy
, size
, free
, NULL
);
87 static uint8_t *producer_get_alpha_mask( mlt_frame
this )
89 // Obtain properties of frame
90 mlt_properties properties
= mlt_frame_properties( this );
92 // Return the alpha mask
93 return mlt_properties_get_data( properties
, "alpha", NULL
);
96 static int producer_get_frame( mlt_producer producer
, mlt_frame_ptr frame
, int index
)
98 producer_pixbuf
this = producer
->child
;
99 GdkPixbuf
*pixbuf
= NULL
;
100 GError
*error
= NULL
;
103 *frame
= mlt_frame_init( );
105 // Obtain properties of frame
106 mlt_properties properties
= mlt_frame_properties( *frame
);
108 // optimization for subsequent iterations on single picture
109 if ( this->image
!= NULL
)
112 mlt_properties_set_int( properties
, "width", this->width
);
113 mlt_properties_set_int( properties
, "height", this->height
);
115 // if picture sequence pass the image and alpha data without destructor
116 mlt_properties_set_data( properties
, "image", this->image
, 0, NULL
, NULL
);
117 mlt_properties_set_data( properties
, "alpha", this->alpha
, 0, NULL
, NULL
);
119 // Set alpha mask call back
120 ( *frame
)->get_alpha_mask
= producer_get_alpha_mask
;
122 // Stack the get image callback
123 mlt_frame_push_get_image( *frame
, producer_get_image
);
126 else if ( strchr( this->filename
, '%' ) != NULL
)
128 // handle picture sequences
131 int current
= this->counter
;
135 snprintf( filename
, 1023, this->filename
, this->counter
);
136 pixbuf
= gdk_pixbuf_new_from_file( filename
, &error
);
137 // allow discontinuity in frame numbers up to 99
139 } while ( pixbuf
== NULL
&& ( this->counter
- current
) < 100 );
143 pixbuf
= gdk_pixbuf_new_from_file( this->filename
, &error
);
146 // If we have a pixbuf
149 // Scale to adjust for sample aspect ratio
152 GdkPixbuf
*temp
= pixbuf
;
153 GdkPixbuf
*scaled
= gdk_pixbuf_scale_simple( pixbuf
,
154 (gint
) ( (float) gdk_pixbuf_get_width( pixbuf
) * 54.0/59.0),
155 gdk_pixbuf_get_height( pixbuf
), GDK_INTERP_HYPER
);
157 g_object_unref( temp
);
161 GdkPixbuf
*temp
= pixbuf
;
162 GdkPixbuf
*scaled
= gdk_pixbuf_scale_simple( pixbuf
,
163 (gint
) ( (float) gdk_pixbuf_get_width( pixbuf
) * 11.0/10.0 ),
164 gdk_pixbuf_get_height( pixbuf
), GDK_INTERP_HYPER
);
166 g_object_unref( temp
);
169 // Store width and height
170 this->width
= gdk_pixbuf_get_width( pixbuf
);
171 this->height
= gdk_pixbuf_get_height( pixbuf
);
173 // Allocate/define image and alpha
174 uint8_t *image
= malloc( this->width
* this->height
* 2 );
175 uint8_t *alpha
= NULL
;
177 // Extract YUV422 and alpha
178 if ( gdk_pixbuf_get_has_alpha( pixbuf
) )
180 // Allocate the alpha mask
181 alpha
= malloc( this->width
* this->height
);
184 mlt_convert_rgb24a_to_yuv422( gdk_pixbuf_get_pixels( pixbuf
),
185 this->width
, this->height
,
186 gdk_pixbuf_get_rowstride( pixbuf
),
191 // No alpha to extract
192 mlt_convert_rgb24_to_yuv422( gdk_pixbuf_get_pixels( pixbuf
),
193 this->width
, this->height
,
194 gdk_pixbuf_get_rowstride( pixbuf
),
198 // Finished with pixbuf now
199 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
);
205 // Pass alpha and image on properties with or without destructor
206 if ( this->counter
>= 0 )
208 // if picture sequence pass the image and alpha data with destructor
209 mlt_properties_set_data( properties
, "image", image
, 0, free
, NULL
);
210 mlt_properties_set_data( properties
, "alpha", alpha
, 0, free
, NULL
);
214 // if single picture, reference the image and alpha in the producer
218 // pass the image and alpha data without destructor
219 mlt_properties_set_data( properties
, "image", image
, 0, NULL
, NULL
);
220 mlt_properties_set_data( properties
, "alpha", alpha
, 0, NULL
, NULL
);
223 // Set alpha call back
224 ( *frame
)->get_alpha_mask
= producer_get_alpha_mask
;
226 // Push the get_image method
227 mlt_frame_push_get_image( *frame
, producer_get_image
);
230 // Update timecode on the frame we're creating
231 mlt_frame_set_timecode( *frame
, mlt_producer_position( producer
) );
233 // Calculate the next timecode
234 mlt_producer_prepare_next( producer
);
239 static void producer_close( mlt_producer parent
)
241 producer_pixbuf
this = parent
->child
;
242 if ( this->filename
)
243 free( this->filename
);
248 parent
->close
= NULL
;
249 mlt_producer_close( parent
);