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
);
37 mlt_producer
producer_pixbuf_init( const char *filename
)
39 producer_pixbuf
this = calloc( sizeof( struct producer_pixbuf_s
), 1 );
40 if ( this != NULL
&& mlt_producer_init( &this->parent
, this ) == 0 )
42 mlt_producer producer
= &this->parent
;
44 producer
->get_frame
= producer_get_frame
;
45 producer
->close
= producer_close
;
47 this->filename
= strdup( filename
);
50 // Get the properties interface
51 mlt_properties properties
= mlt_producer_properties( &this->parent
);
53 // Set the default properties
54 mlt_properties_set_int( properties
, "video_standard", mlt_video_standard_pal
);
64 static int producer_get_image( mlt_frame
this, uint8_t **buffer
, mlt_image_format
*format
, int *width
, int *height
, int writable
)
66 // Obtain properties of frame
67 mlt_properties properties
= mlt_frame_properties( this );
69 // May need to know the size of the image to clone it
73 uint8_t *image
= mlt_properties_get_data( properties
, "image", &size
);
75 // Get width and height
76 *width
= mlt_properties_get_int( properties
, "width" );
77 *height
= mlt_properties_get_int( properties
, "height" );
83 uint8_t *copy
= malloc( size
);
84 memcpy( copy
, image
, size
);
86 // We're going to pass the copy on
89 // Now update properties so we free the copy after
90 mlt_properties_set_data( properties
, "image", copy
, size
, free
, NULL
);
99 static uint8_t *producer_get_alpha_mask( mlt_frame
this )
101 // Obtain properties of frame
102 mlt_properties properties
= mlt_frame_properties( this );
104 // Return the alpha mask
105 return mlt_properties_get_data( properties
, "alpha", NULL
);
108 static int producer_get_frame( mlt_producer producer
, mlt_frame_ptr frame
, int index
)
110 producer_pixbuf
this = producer
->child
;
111 GdkPixbuf
*pixbuf
= NULL
;
112 GError
*error
= NULL
;
115 *frame
= mlt_frame_init( );
117 // Obtain properties of frame
118 mlt_properties properties
= mlt_frame_properties( *frame
);
120 // optimization for subsequent iterations on single picture
121 if ( this->image
!= NULL
)
124 mlt_properties_set_int( properties
, "width", this->width
);
125 mlt_properties_set_int( properties
, "height", this->height
);
127 // if picture sequence pass the image and alpha data without destructor
128 mlt_properties_set_data( properties
, "image", this->image
, 0, NULL
, NULL
);
129 mlt_properties_set_data( properties
, "alpha", this->alpha
, 0, NULL
, NULL
);
131 // Set alpha mask call back
132 ( *frame
)->get_alpha_mask
= producer_get_alpha_mask
;
134 // Stack the get image callback
135 mlt_frame_push_get_image( *frame
, producer_get_image
);
138 else if ( strchr( this->filename
, '%' ) != NULL
)
140 // handle picture sequences
143 int current
= this->counter
;
147 snprintf( filename
, 1023, this->filename
, this->counter
);
148 pixbuf
= gdk_pixbuf_new_from_file( filename
, &error
);
149 // allow discontinuity in frame numbers up to 99
151 } while ( pixbuf
== NULL
&& ( this->counter
- current
) < 100 );
155 pixbuf
= gdk_pixbuf_new_from_file( this->filename
, &error
);
158 // If we have a pixbuf
161 // Scale to adjust for sample aspect ratio
162 if ( mlt_properties_get_int( properties
, "video_stadnard" ) == mlt_video_standard_pal
)
164 GdkPixbuf
*temp
= pixbuf
;
165 GdkPixbuf
*scaled
= gdk_pixbuf_scale_simple( pixbuf
,
166 (gint
) ( (float) gdk_pixbuf_get_width( pixbuf
) * 54.0/59.0),
167 gdk_pixbuf_get_height( pixbuf
), GDK_INTERP_HYPER
);
169 g_object_unref( temp
);
173 GdkPixbuf
*temp
= pixbuf
;
174 GdkPixbuf
*scaled
= gdk_pixbuf_scale_simple( pixbuf
,
175 (gint
) ( (float) gdk_pixbuf_get_width( pixbuf
) * 11.0/10.0 ),
176 gdk_pixbuf_get_height( pixbuf
), GDK_INTERP_HYPER
);
178 g_object_unref( temp
);
181 // Store width and height
182 this->width
= gdk_pixbuf_get_width( pixbuf
);
183 this->height
= gdk_pixbuf_get_height( pixbuf
);
185 // Allocate/define image and alpha
186 uint8_t *image
= malloc( this->width
* this->height
* 2 );
187 uint8_t *alpha
= NULL
;
189 // Extract YUV422 and alpha
190 if ( gdk_pixbuf_get_has_alpha( pixbuf
) )
192 // Allocate the alpha mask
193 alpha
= malloc( this->width
* this->height
);
196 mlt_convert_rgb24a_to_yuv422( gdk_pixbuf_get_pixels( pixbuf
),
197 this->width
, this->height
,
198 gdk_pixbuf_get_rowstride( pixbuf
),
203 // No alpha to extract
204 mlt_convert_rgb24_to_yuv422( gdk_pixbuf_get_pixels( pixbuf
),
205 this->width
, this->height
,
206 gdk_pixbuf_get_rowstride( pixbuf
),
210 // Finished with pixbuf now
211 g_object_unref( pixbuf
);
213 // Set width/height of frame
214 mlt_properties_set_int( properties
, "width", this->width
);
215 mlt_properties_set_int( properties
, "height", this->height
);
217 // Pass alpha and image on properties with or without destructor
218 if ( this->counter
>= 0 )
220 // if picture sequence pass the image and alpha data with destructor
221 mlt_properties_set_data( properties
, "image", image
, 0, free
, NULL
);
222 mlt_properties_set_data( properties
, "alpha", alpha
, 0, free
, NULL
);
226 // if single picture, reference the image and alpha in the producer
230 // pass the image and alpha data without destructor
231 mlt_properties_set_data( properties
, "image", image
, 0, NULL
, NULL
);
232 mlt_properties_set_data( properties
, "alpha", alpha
, 0, NULL
, NULL
);
235 // Set alpha call back
236 ( *frame
)->get_alpha_mask
= producer_get_alpha_mask
;
238 // Push the get_image method
239 mlt_frame_push_get_image( *frame
, producer_get_image
);
242 // Update timecode on the frame we're creating
243 mlt_frame_set_timecode( *frame
, mlt_producer_position( producer
) );
245 // Calculate the next timecode
246 mlt_producer_prepare_next( producer
);
251 static void producer_close( mlt_producer parent
)
253 producer_pixbuf
this = parent
->child
;
254 if ( this->filename
)
255 free( this->filename
);
260 parent
->close
= NULL
;
261 mlt_producer_close( parent
);