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 );
59 rgba_color parse_color( char *color )
61 rgba_color result = { 0xff, 0xff, 0xff, 0xff };
63 if ( strchr( color, '/' ) )
64 color = strrchr( color, '/' ) + 1;
66 if ( !strncmp( color, "0x", 2 ) )
68 unsigned int temp = 0;
69 sscanf( color + 2, "%x", &temp );
70 result.r = ( temp >> 24 ) & 0xff;
71 result.g = ( temp >> 16 ) & 0xff;
72 result.b = ( temp >> 8 ) & 0xff;
73 result.a = ( temp ) & 0xff;
75 else if ( !strcmp( color, "red" ) )
81 else if ( !strcmp( color, "green" ) )
87 else if ( !strcmp( color, "blue" ) )
93 else if ( strcmp( color, "white" ) )
95 unsigned int temp = 0;
96 sscanf( color, "%d", &temp );
97 result.r = ( temp >> 24 ) & 0xff;
98 result.g = ( temp >> 16 ) & 0xff;
99 result.b = ( temp >> 8 ) & 0xff;
100 result.a = ( temp ) & 0xff;
106 static int producer_get_image( mlt_frame frame, uint8_t **buffer, mlt_image_format *format, int *width, int *height, int writable )
108 // May need to know the size of the image to clone it
111 // Obtain properties of frame
112 mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
114 // Obtain the producer for this frame
115 mlt_producer producer = mlt_properties_get_data( properties, "producer_colour", NULL );
117 // Obtain properties of producer
118 mlt_properties producer_props = MLT_PRODUCER_PROPERTIES( producer );
121 rgba_color color = parse_color( mlt_properties_get( producer_props, "resource" ) );
123 // Get the current image and dimensions cached in the producer
124 uint8_t *image = mlt_properties_get_data( producer_props, "image", &size );
125 int current_width = mlt_properties_get_int( producer_props, "width" );
126 int current_height = mlt_properties_get_int( producer_props, "height" );
128 // See if we need to regenerate
129 if ( *width != current_width || *height != current_height )
135 // Allocate the image
136 size = *width * *height * 2;
137 image = mlt_pool_alloc( size );
139 // Update the producer
140 mlt_properties_set_data( producer_props, "image", image, size, mlt_pool_release, NULL );
141 mlt_properties_set_int( producer_props, "width", *width );
142 mlt_properties_set_int( producer_props, "height", *height );
144 RGB2YUV( color.r, color.g, color.b, y, u, v );
156 mlt_properties_set_data( properties, "image", image, size, NULL, NULL );
157 mlt_properties_set_int( properties, "width", *width );
158 mlt_properties_set_int( properties, "height", *height );
160 // Clone if necessary
163 // Create the alpha channel
164 uint8_t *alpha = mlt_pool_alloc( size >> 1 );
167 uint8_t *copy = mlt_pool_alloc( size );
168 memcpy( copy, image, size );
170 // We're going to pass the copy on
173 // Initialise the alpha
175 memset( alpha, color.a, size >> 1 );
177 // Now update properties so we free the copy after
178 mlt_properties_set_data( properties, "image", copy, size, mlt_pool_release, NULL );
179 mlt_properties_set_data( properties, "alpha", alpha, size >> 1, mlt_pool_release, NULL );
184 *format = mlt_image_yuv422;
189 static int producer_get_frame( mlt_producer producer, mlt_frame_ptr frame, int index )
192 *frame = mlt_frame_init( );
194 if ( *frame != NULL )
196 // Obtain properties of frame and producer
197 mlt_properties properties = MLT_FRAME_PROPERTIES( *frame );
199 // Obtain properties of producer
200 mlt_properties producer_props = MLT_PRODUCER_PROPERTIES( producer );
202 // Set the producer on the frame properties
203 mlt_properties_set_data( properties, "producer_colour", producer, 0, NULL, NULL );
205 // Update timecode on the frame we're creating
206 mlt_frame_set_position( *frame, mlt_producer_position( producer ) );
208 // Set producer-specific frame properties
209 mlt_properties_set_int( properties, "progressive", 1 );
210 mlt_properties_set_double( properties, "aspect_ratio", 0 );
212 // colour is an alias for resource
213 if ( mlt_properties_get( producer_props, "colour" ) != NULL )
214 mlt_properties_set( producer_props, "resource", mlt_properties_get( producer_props, "colour" ) );
216 // Push the get_image method
217 mlt_frame_push_get_image( *frame, producer_get_image );
220 // Calculate the next timecode
221 mlt_producer_prepare_next( producer );
226 static void producer_close( mlt_producer producer )
228 producer->close = NULL;
229 mlt_producer_close( producer );