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 );