2 * producer_colour.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_colour.h"
22 #include <framework/mlt_frame.h>
23 #include <framework/mlt_pool.h>
35 static int producer_get_frame( mlt_producer parent
, mlt_frame_ptr frame
, int index
);
36 static void producer_close( mlt_producer parent
);
38 mlt_producer
producer_colour_init( char *colour
)
40 mlt_producer producer
= calloc( 1, sizeof( struct mlt_producer_s
) );
41 if ( producer
!= NULL
&& mlt_producer_init( producer
, NULL
) == 0 )
43 // Get the properties interface
44 mlt_properties properties
= MLT_PRODUCER_PROPERTIES( producer
);
46 // Callback registration
47 producer
->get_frame
= producer_get_frame
;
48 producer
->close
= ( mlt_destructor
)producer_close
;
50 // Set the default properties
51 mlt_properties_set( properties
, "resource", colour
== NULL ?
"0x000000ff" : colour
);
52 mlt_properties_set( properties
, "_resource", "" );
60 rgba_color
parse_color( char *color
)
62 rgba_color result
= { 0xff, 0xff, 0xff, 0xff };
64 if ( strchr( color
, '/' ) )
65 color
= strrchr( color
, '/' ) + 1;
67 if ( !strncmp( color
, "0x", 2 ) )
69 unsigned int temp
= 0;
70 sscanf( color
+ 2, "%x", &temp
);
71 result
.r
= ( temp
>> 24 ) & 0xff;
72 result
.g
= ( temp
>> 16 ) & 0xff;
73 result
.b
= ( temp
>> 8 ) & 0xff;
74 result
.a
= ( temp
) & 0xff;
76 else if ( !strcmp( color
, "red" ) )
82 else if ( !strcmp( color
, "green" ) )
88 else if ( !strcmp( color
, "blue" ) )
94 else if ( strcmp( color
, "white" ) )
96 unsigned int temp
= 0;
97 sscanf( color
, "%d", &temp
);
98 result
.r
= ( temp
>> 24 ) & 0xff;
99 result
.g
= ( temp
>> 16 ) & 0xff;
100 result
.b
= ( temp
>> 8 ) & 0xff;
101 result
.a
= ( temp
) & 0xff;
107 static int producer_get_image( mlt_frame frame
, uint8_t **buffer
, mlt_image_format
*format
, int *width
, int *height
, int writable
)
109 // May need to know the size of the image to clone it
112 // Obtain properties of frame
113 mlt_properties properties
= MLT_FRAME_PROPERTIES( frame
);
115 // Obtain the producer for this frame
116 mlt_producer producer
= mlt_properties_get_data( properties
, "producer_colour", NULL
);
118 // Obtain properties of producer
119 mlt_properties producer_props
= MLT_PRODUCER_PROPERTIES( producer
);
121 // Get the current and previous colour strings
122 char *now
= mlt_properties_get( producer_props
, "resource" );
123 char *then
= mlt_properties_get( producer_props
, "_resource" );
125 // Get the current image and dimensions cached in the producer
126 uint8_t *image
= mlt_properties_get_data( producer_props
, "image", &size
);
127 int current_width
= mlt_properties_get_int( producer_props
, "_width" );
128 int current_height
= mlt_properties_get_int( producer_props
, "_height" );
131 rgba_color color
= parse_color( now
);
133 // See if we need to regenerate
134 if ( strcmp( now
, then
) || *width
!= current_width
|| *height
!= current_height
)
140 // Allocate the image
141 size
= *width
* *height
* 2;
142 image
= mlt_pool_alloc( size
);
144 // Update the producer
145 mlt_properties_set_data( producer_props
, "image", image
, size
, mlt_pool_release
, NULL
);
146 mlt_properties_set_int( producer_props
, "_width", *width
);
147 mlt_properties_set_int( producer_props
, "_height", *height
);
148 mlt_properties_set( producer_props
, "_resource", now
);
150 RGB2YUV( color
.r
, color
.g
, color
.b
, y
, u
, v
);
162 mlt_properties_set_int( properties
, "width", *width
);
163 mlt_properties_set_int( properties
, "height", *height
);
165 // Clone if necessary (deemed always necessary)
168 // Create the alpha channel
169 uint8_t *alpha
= mlt_pool_alloc( size
>> 1 );
172 uint8_t *copy
= mlt_pool_alloc( size
);
173 memcpy( copy
, image
, size
);
175 // We're going to pass the copy on
178 // Initialise the alpha
180 memset( alpha
, color
.a
, size
>> 1 );
182 // Now update properties so we free the copy after
183 mlt_properties_set_data( properties
, "image", copy
, size
, mlt_pool_release
, NULL
);
184 mlt_properties_set_data( properties
, "alpha", alpha
, size
>> 1, mlt_pool_release
, NULL
);
189 *format
= mlt_image_yuv422
;
194 static int producer_get_frame( mlt_producer producer
, mlt_frame_ptr frame
, int index
)
197 *frame
= mlt_frame_init( );
199 if ( *frame
!= NULL
)
201 // Obtain properties of frame and producer
202 mlt_properties properties
= MLT_FRAME_PROPERTIES( *frame
);
204 // Obtain properties of producer
205 mlt_properties producer_props
= MLT_PRODUCER_PROPERTIES( producer
);
207 // Set the producer on the frame properties
208 mlt_properties_set_data( properties
, "producer_colour", producer
, 0, NULL
, NULL
);
210 // Update timecode on the frame we're creating
211 mlt_frame_set_position( *frame
, mlt_producer_position( producer
) );
213 // Set producer-specific frame properties
214 mlt_properties_set_int( properties
, "progressive", 1 );
215 mlt_properties_set_double( properties
, "aspect_ratio", 0 );
217 // colour is an alias for resource
218 if ( mlt_properties_get( producer_props
, "colour" ) != NULL
)
219 mlt_properties_set( producer_props
, "resource", mlt_properties_get( producer_props
, "colour" ) );
221 // Push the get_image method
222 mlt_frame_push_get_image( *frame
, producer_get_image
);
225 // Calculate the next timecode
226 mlt_producer_prepare_next( producer
);
231 static void producer_close( mlt_producer producer
)
233 producer
->close
= NULL
;
234 mlt_producer_close( producer
);