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
);
51 static int producer_get_image( mlt_frame
this, uint8_t **buffer
, mlt_image_format
*format
, int *width
, int *height
, int writable
)
53 // Obtain properties of frame
54 mlt_properties properties
= mlt_frame_properties( this );
56 // May need to know the size of the image to clone it
60 uint8_t *image
= mlt_properties_get_data( properties
, "image", &size
);
62 // Get width and height
63 *width
= mlt_properties_get_int( properties
, "width" );
64 *height
= mlt_properties_get_int( properties
, "height" );
70 uint8_t *copy
= malloc( size
);
71 memcpy( copy
, image
, size
);
73 // We're going to pass the copy on
76 // Now update properties so we free the copy after
77 mlt_properties_set_data( properties
, "image", copy
, size
, free
, NULL
);
86 uint8_t *producer_get_alpha_mask( mlt_frame
this )
88 // Obtain properties of frame
89 mlt_properties properties
= mlt_frame_properties( this );
91 // Return the alpha mask
92 return mlt_properties_get_data( properties
, "alpha", NULL
);
95 static int producer_get_frame( mlt_producer producer
, mlt_frame_ptr frame
, int index
)
97 producer_pixbuf
this = producer
->child
;
98 GdkPixbuf
*pixbuf
= NULL
;
102 *frame
= mlt_frame_init( );
104 // Obtain properties of frame
105 mlt_properties properties
= mlt_frame_properties( *frame
);
107 // optimization for subsequent iterations on single picture
108 if ( this->image
!= NULL
)
111 mlt_properties_set_int( properties
, "width", this->width
);
112 mlt_properties_set_int( properties
, "height", this->height
);
114 // if picture sequence pass the image and alpha data without destructor
115 mlt_properties_set_data( properties
, "image", this->image
, 0, NULL
, NULL
);
116 mlt_properties_set_data( properties
, "alpha", this->alpha
, 0, NULL
, NULL
);
118 // Set alpha mask call back
119 ( *frame
)->get_alpha_mask
= producer_get_alpha_mask
;
121 // Stack the get image callback
122 mlt_frame_push_get_image( *frame
, producer_get_image
);
125 else if ( strchr( this->filename
, '%' ) != NULL
)
127 // handle picture sequences
130 int current
= this->counter
;
134 snprintf( filename
, 1023, this->filename
, this->counter
);
135 pixbuf
= gdk_pixbuf_new_from_file( filename
, &error
);
136 // allow discontinuity in frame numbers up to 99
138 } while ( pixbuf
== NULL
&& ( this->counter
- current
) < 100 );
142 pixbuf
= gdk_pixbuf_new_from_file( this->filename
, &error
);
145 // If we have a pixbuf
148 // Store width and height
149 this->width
= gdk_pixbuf_get_width( pixbuf
);
150 this->height
= gdk_pixbuf_get_height( pixbuf
);
152 // Allocate/define image and alpha
153 uint8_t *image
= malloc( this->width
* this->height
* 2 );
154 uint8_t *alpha
= NULL
;
156 // Extract YUV422 and alpha
157 if ( gdk_pixbuf_get_has_alpha( pixbuf
) )
159 // Allocate the alpha mask
160 alpha
= malloc( this->width
* this->height
);
163 mlt_convert_rgb24a_to_yuv422( gdk_pixbuf_get_pixels( pixbuf
),
164 this->width
, this->height
,
165 gdk_pixbuf_get_rowstride( pixbuf
),
170 // No alpha to extract
171 mlt_convert_rgb24_to_yuv422( gdk_pixbuf_get_pixels( pixbuf
),
172 this->width
, this->height
,
173 gdk_pixbuf_get_rowstride( pixbuf
),
177 // Finished with pixbuf now
178 g_object_unref( pixbuf
);
180 // Set width/height of frame
181 mlt_properties_set_int( properties
, "width", this->width
);
182 mlt_properties_set_int( properties
, "height", this->height
);
184 // Pass alpha and image on properties with or without destructor
185 if ( this->counter
>= 0 )
187 // if picture sequence pass the image and alpha data with destructor
188 mlt_properties_set_data( properties
, "image", image
, 0, free
, NULL
);
189 mlt_properties_set_data( properties
, "alpha", alpha
, 0, free
, NULL
);
193 // if single picture, reference the image and alpha in the producer
197 // pass the image and alpha data without destructor
198 mlt_properties_set_data( properties
, "image", image
, 0, NULL
, NULL
);
199 mlt_properties_set_data( properties
, "alpha", alpha
, 0, NULL
, NULL
);
202 // Set alpha call back
203 ( *frame
)->get_alpha_mask
= producer_get_alpha_mask
;
205 // Push the get_image method
206 mlt_frame_push_get_image( *frame
, producer_get_image
);
209 // Update timecode on the frame we're creating
210 mlt_frame_set_timecode( *frame
, mlt_producer_position( producer
) );
212 // Calculate the next timecode
213 mlt_producer_prepare_next( producer
);
218 static void producer_close( mlt_producer parent
)
220 producer_pixbuf
this = parent
->child
;
221 if ( this->filename
)
222 free( this->filename
);
227 parent
->close
= NULL
;
228 mlt_producer_close( parent
);