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 library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * This library 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 GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 #include <framework/mlt_producer.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( mlt_profile profile
, mlt_service_type type
, const char *id
, 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", "" );
53 mlt_properties_set_double( properties
, "aspect_ratio", 0 );
61 rgba_color
parse_color( char *color
, unsigned int color_int
)
63 rgba_color result
= { 0xff, 0xff, 0xff, 0xff };
65 if ( !strcmp( color
, "red" ) )
71 else if ( !strcmp( color
, "green" ) )
77 else if ( !strcmp( color
, "blue" ) )
83 else if ( strcmp( color
, "white" ) )
85 result
.r
= ( color_int
>> 24 ) & 0xff;
86 result
.g
= ( color_int
>> 16 ) & 0xff;
87 result
.b
= ( color_int
>> 8 ) & 0xff;
88 result
.a
= ( color_int
) & 0xff;
94 static int producer_get_image( mlt_frame frame
, uint8_t **buffer
, mlt_image_format
*format
, int *width
, int *height
, int writable
)
96 // May need to know the size of the image to clone it
99 // Obtain properties of frame
100 mlt_properties properties
= MLT_FRAME_PROPERTIES( frame
);
102 // Obtain the producer for this frame
103 mlt_producer producer
= mlt_properties_get_data( properties
, "producer_colour", NULL
);
105 // Obtain properties of producer
106 mlt_properties producer_props
= MLT_PRODUCER_PROPERTIES( producer
);
108 // Get the current and previous colour strings
109 char *now
= mlt_properties_get( producer_props
, "resource" );
110 char *then
= mlt_properties_get( producer_props
, "_resource" );
112 // Get the current image and dimensions cached in the producer
113 uint8_t *image
= mlt_properties_get_data( producer_props
, "image", &size
);
114 int current_width
= mlt_properties_get_int( producer_props
, "_width" );
115 int current_height
= mlt_properties_get_int( producer_props
, "_height" );
118 char *resource
= mlt_properties_get( producer_props
, "resource" );
119 if ( resource
&& strchr( resource
, '/' ) )
120 mlt_properties_set( producer_props
, "resource", strrchr( resource
, '/' ) + 1 );
121 rgba_color color
= parse_color( now
, mlt_properties_get_int( producer_props
, "resource" ) );
123 // See if we need to regenerate
124 if ( strcmp( now
, then
) || *width
!= current_width
|| *height
!= current_height
)
130 int uneven
= *width
% 2;
131 int count
= ( *width
- uneven
) / 2;
134 // Allocate the image
135 size
= *width
* *height
* 2;
136 image
= mlt_pool_alloc( size
);
138 // Update the producer
139 mlt_properties_set_data( producer_props
, "image", image
, size
, mlt_pool_release
, NULL
);
140 mlt_properties_set_int( producer_props
, "_width", *width
);
141 mlt_properties_set_int( producer_props
, "_height", *height
);
142 mlt_properties_set( producer_props
, "_resource", now
);
144 RGB2YUV( color
.r
, color
.g
, color
.b
, y
, u
, v
);
167 mlt_properties_set_int( properties
, "width", *width
);
168 mlt_properties_set_int( properties
, "height", *height
);
170 // Clone if necessary (deemed always necessary)
173 // Create the alpha channel
174 uint8_t *alpha
= mlt_pool_alloc( size
>> 1 );
177 uint8_t *copy
= mlt_pool_alloc( size
);
178 memcpy( copy
, image
, size
);
180 // We're going to pass the copy on
183 // Initialise the alpha
185 memset( alpha
, color
.a
, size
>> 1 );
187 // Now update properties so we free the copy after
188 mlt_properties_set_data( properties
, "image", copy
, size
, mlt_pool_release
, NULL
);
189 mlt_properties_set_data( properties
, "alpha", alpha
, size
>> 1, mlt_pool_release
, NULL
);
190 mlt_properties_set_double( properties
, "aspect_ratio", mlt_properties_get_double( producer_props
, "aspect_ratio" ) );
195 *format
= mlt_image_yuv422
;
200 static int producer_get_frame( mlt_producer producer
, mlt_frame_ptr frame
, int index
)
203 *frame
= mlt_frame_init( MLT_PRODUCER_SERVICE( producer
) );
205 if ( *frame
!= NULL
)
207 // Obtain properties of frame and producer
208 mlt_properties properties
= MLT_FRAME_PROPERTIES( *frame
);
210 // Obtain properties of producer
211 mlt_properties producer_props
= MLT_PRODUCER_PROPERTIES( producer
);
213 // Set the producer on the frame properties
214 mlt_properties_set_data( properties
, "producer_colour", producer
, 0, NULL
, NULL
);
216 // Update timecode on the frame we're creating
217 mlt_frame_set_position( *frame
, mlt_producer_position( producer
) );
219 // Set producer-specific frame properties
220 mlt_properties_set_int( properties
, "progressive", 1 );
221 mlt_properties_set_double( properties
, "aspect_ratio", mlt_properties_get_double( producer_props
, "aspect_ratio" ) );
223 // colour is an alias for resource
224 if ( mlt_properties_get( producer_props
, "colour" ) != NULL
)
225 mlt_properties_set( producer_props
, "resource", mlt_properties_get( producer_props
, "colour" ) );
227 // Push the get_image method
228 mlt_frame_push_get_image( *frame
, producer_get_image
);
231 // Calculate the next timecode
232 mlt_producer_prepare_next( producer
);
237 static void producer_close( mlt_producer producer
)
239 producer
->close
= NULL
;
240 mlt_producer_close( producer
);