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 "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", "" );
53 mlt_properties_set_double( properties, "aspect_ratio", 0 );
61 rgba_color parse_color( char *color )
63 rgba_color result = { 0xff, 0xff, 0xff, 0xff };
65 if ( strchr( color, '/' ) )
66 color = strrchr( color, '/' ) + 1;
68 if ( !strncmp( color, "0x", 2 ) )
70 unsigned int temp = 0;
71 sscanf( color + 2, "%x", &temp );
72 result.r = ( temp >> 24 ) & 0xff;
73 result.g = ( temp >> 16 ) & 0xff;
74 result.b = ( temp >> 8 ) & 0xff;
75 result.a = ( temp ) & 0xff;
77 else if ( !strcmp( color, "red" ) )
83 else if ( !strcmp( color, "green" ) )
89 else if ( !strcmp( color, "blue" ) )
95 else if ( strcmp( color, "white" ) )
97 unsigned int temp = 0;
98 sscanf( color, "%d", &temp );
99 result.r = ( temp >> 24 ) & 0xff;
100 result.g = ( temp >> 16 ) & 0xff;
101 result.b = ( temp >> 8 ) & 0xff;
102 result.a = ( temp ) & 0xff;
108 static int producer_get_image( mlt_frame frame, uint8_t **buffer, mlt_image_format *format, int *width, int *height, int writable )
110 // May need to know the size of the image to clone it
113 // Obtain properties of frame
114 mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
116 // Obtain the producer for this frame
117 mlt_producer producer = mlt_properties_get_data( properties, "producer_colour", NULL );
119 // Obtain properties of producer
120 mlt_properties producer_props = MLT_PRODUCER_PROPERTIES( producer );
122 // Get the current and previous colour strings
123 char *now = mlt_properties_get( producer_props, "resource" );
124 char *then = mlt_properties_get( producer_props, "_resource" );
126 // Get the current image and dimensions cached in the producer
127 uint8_t *image = mlt_properties_get_data( producer_props, "image", &size );
128 int current_width = mlt_properties_get_int( producer_props, "_width" );
129 int current_height = mlt_properties_get_int( producer_props, "_height" );
132 rgba_color color = parse_color( now );
134 // See if we need to regenerate
135 if ( strcmp( now, then ) || *width != current_width || *height != current_height )
141 int uneven = *width % 2;
142 int count = ( *width - uneven ) / 2;
145 // Allocate the image
146 size = *width * *height * 2;
147 image = mlt_pool_alloc( size );
149 // Update the producer
150 mlt_properties_set_data( producer_props, "image", image, size, mlt_pool_release, NULL );
151 mlt_properties_set_int( producer_props, "_width", *width );
152 mlt_properties_set_int( producer_props, "_height", *height );
153 mlt_properties_set( producer_props, "_resource", now );
155 RGB2YUV( color.r, color.g, color.b, y, u, v );
178 mlt_properties_set_int( properties, "width", *width );
179 mlt_properties_set_int( properties, "height", *height );
181 // Clone if necessary (deemed always necessary)
184 // Create the alpha channel
185 uint8_t *alpha = mlt_pool_alloc( size >> 1 );
188 uint8_t *copy = mlt_pool_alloc( size );
189 memcpy( copy, image, size );
191 // We're going to pass the copy on
194 // Initialise the alpha
196 memset( alpha, color.a, size >> 1 );
198 // Now update properties so we free the copy after
199 mlt_properties_set_data( properties, "image", copy, size, mlt_pool_release, NULL );
200 mlt_properties_set_data( properties, "alpha", alpha, size >> 1, mlt_pool_release, NULL );
201 mlt_properties_set_double( properties, "aspect_ratio", mlt_properties_get_double( producer_props, "aspect_ratio" ) );
206 *format = mlt_image_yuv422;
211 static int producer_get_frame( mlt_producer producer, mlt_frame_ptr frame, int index )
214 *frame = mlt_frame_init( );
216 if ( *frame != NULL )
218 // Obtain properties of frame and producer
219 mlt_properties properties = MLT_FRAME_PROPERTIES( *frame );
221 // Obtain properties of producer
222 mlt_properties producer_props = MLT_PRODUCER_PROPERTIES( producer );
224 // Set the producer on the frame properties
225 mlt_properties_set_data( properties, "producer_colour", producer, 0, NULL, NULL );
227 // Update timecode on the frame we're creating
228 mlt_frame_set_position( *frame, mlt_producer_position( producer ) );
230 // Set producer-specific frame properties
231 mlt_properties_set_int( properties, "progressive", 1 );
232 mlt_properties_set_double( properties, "aspect_ratio", mlt_properties_get_double( producer_props, "aspect_ratio" ) );
234 // colour is an alias for resource
235 if ( mlt_properties_get( producer_props, "colour" ) != NULL )
236 mlt_properties_set( producer_props, "resource", mlt_properties_get( producer_props, "colour" ) );
238 // Push the get_image method
239 mlt_frame_push_get_image( *frame, producer_get_image );
242 // Calculate the next timecode
243 mlt_producer_prepare_next( producer );
248 static void producer_close( mlt_producer producer )
250 producer->close = NULL;
251 mlt_producer_close( producer );