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 = 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 ( !strncmp( color, "0x", 2 ) )
65 unsigned int temp = 0;
66 sscanf( color + 2, "%x", &temp );
67 result.r = ( temp >> 24 ) & 0xff;
68 result.g = ( temp >> 16 ) & 0xff;
69 result.b = ( temp >> 8 ) & 0xff;
70 result.a = ( temp ) & 0xff;
72 else if ( !strcmp( color, "red" ) )
78 else if ( !strcmp( color, "green" ) )
84 else if ( !strcmp( color, "blue" ) )
90 else if ( strcmp( color, "white" ) )
92 unsigned int temp = 0;
93 sscanf( color, "%d", &temp );
94 result.r = ( temp >> 24 ) & 0xff;
95 result.g = ( temp >> 16 ) & 0xff;
96 result.b = ( temp >> 8 ) & 0xff;
97 result.a = ( temp ) & 0xff;
103 static int producer_get_image( mlt_frame frame, uint8_t **buffer, mlt_image_format *format, int *width, int *height, int writable )
105 // May need to know the size of the image to clone it
108 // Obtain properties of frame
109 mlt_properties properties = mlt_frame_properties( frame );
111 // Obtain the producer for this frame
112 mlt_producer producer = mlt_properties_get_data( properties, "producer_colour", NULL );
114 // Obtain properties of producer
115 mlt_properties producer_props = mlt_producer_properties( producer );
117 // Get the current image and dimensions cached in the producer
118 uint8_t *image = mlt_properties_get_data( producer_props, "image", &size );
119 int current_width = mlt_properties_get_int( producer_props, "width" );
120 int current_height = mlt_properties_get_int( producer_props, "height" );
122 // See if we need to regenerate
123 if ( *width != current_width || *height != current_height )
125 // Allocate the image
126 size = *width * *height * 2;
127 image = mlt_pool_alloc( size );
129 // Update the producer
130 mlt_properties_set_data( producer_props, "image", image, size, mlt_pool_release, NULL );
131 mlt_properties_set_int( producer_props, "width", *width );
132 mlt_properties_set_int( producer_props, "height", *height );
135 rgba_color color = parse_color( mlt_properties_get( producer_props, "resource" ) );
138 RGB2YUV( color.r, color.g, color.b, y, u, v );
143 for ( i = 0; i < size; i += 4 )
144 memcpy( &image[ i ], &color, 4 );
148 mlt_properties_set_data( properties, "image", image, size, NULL, NULL );
149 mlt_properties_set_int( properties, "width", *width );
150 mlt_properties_set_int( properties, "height", *height );
152 // Clone if necessary
156 uint8_t *copy = mlt_pool_alloc( size );
157 memcpy( copy, image, size );
159 // We're going to pass the copy on
162 // Now update properties so we free the copy after
163 mlt_properties_set_data( properties, "image", copy, size, mlt_pool_release, NULL );
168 *format = mlt_image_yuv422;
173 static int producer_get_frame( mlt_producer producer, mlt_frame_ptr frame, int index )
176 *frame = mlt_frame_init( );
178 if ( *frame != NULL )
180 // Obtain properties of frame and producer
181 mlt_properties properties = mlt_frame_properties( *frame );
183 // Obtain properties of producer
184 mlt_properties producer_props = mlt_producer_properties( producer );
186 // Set the producer on the frame properties
187 mlt_properties_set_data( properties, "producer_colour", producer, 0, NULL, NULL );
189 // Update timecode on the frame we're creating
190 mlt_frame_set_position( *frame, mlt_producer_position( producer ) );
192 // Set producer-specific frame properties
193 mlt_properties_set_int( properties, "progressive", 1 );
195 // colour is an alias for resource
196 if ( mlt_properties_get( producer_props, "colour" ) != NULL )
197 mlt_properties_set( producer_props, "resource", mlt_properties_get( producer_props, "colour" ) );
199 // Push the get_image method
200 mlt_frame_push_get_image( *frame, producer_get_image );
203 // Calculate the next timecode
204 mlt_producer_prepare_next( producer );
209 static void producer_close( mlt_producer producer )
211 producer->close = NULL;
212 mlt_producer_close( producer );