2 * producer_sdl_image.c -- Image loader which wraps SDL_image
3 * Copyright (C) 2005 Visual Media FX
4 * Author: Charles Yates <charles.yates@gmail.com>
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>
28 #include <sys/types.h>
34 #include <SDL_image.h>
36 static int producer_get_image( mlt_frame frame, uint8_t **image, mlt_image_format *format, int *width, int *height, int writable )
38 mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
39 SDL_Surface *surface = mlt_properties_get_data( properties, "surface", NULL );
40 SDL_Surface *converted = NULL;
44 int image_size = *width * *height * 3;
46 if ( surface->format->BitsPerPixel != 32 && surface->format->BitsPerPixel != 24 )
49 fmt.BitsPerPixel = 24;
50 fmt.BytesPerPixel = 3;
54 fmt.Rmask = 0xff << 16;
55 fmt.Gmask = 0xff << 8;
57 converted = SDL_ConvertSurface( surface, &fmt, 0 );
60 switch( surface->format->BitsPerPixel )
63 *format = mlt_image_rgb24a;
64 image_size = *width * *height * 4;
65 *image = mlt_pool_alloc( image_size );
66 memcpy( *image, surface->pixels, image_size );
69 *format = mlt_image_rgb24;
70 *image = mlt_pool_alloc( image_size );
71 memcpy( *image, surface->pixels, image_size );
76 SDL_FreeSurface( converted );
79 mlt_frame_set_image( frame, *image, image_size, mlt_pool_release );
84 static int filter_files( const struct dirent *de )
86 return de->d_name[ 0 ] != '.';
89 static mlt_properties parse_file_names( char *resource )
91 mlt_properties properties = mlt_properties_new( );
93 if ( strstr( resource, "/.all." ) != NULL )
95 char *dir_name = strdup( resource );
96 char *extension = strrchr( resource, '.' );
97 *( strstr( dir_name, "/.all." ) + 1 ) = '\0';
98 char fullname[ 1024 ];
99 strcpy( fullname, dir_name );
100 struct dirent **de = NULL;
101 int n = scandir( fullname, &de, filter_files, alphasort );
105 for (i = 0; i < n; i++ )
107 snprintf( fullname, 1023, "%s%s", dir_name, de[i]->d_name );
108 if ( strstr( fullname, extension ) && lstat( fullname, &info ) == 0 &&
109 ( S_ISREG( info.st_mode ) || info.st_mode | S_IXUSR ) )
112 sprintf( temp, "%d", i );
113 mlt_properties_set( properties, temp, fullname );
123 mlt_properties_set( properties, "0", resource );
129 static SDL_Surface *load_image( mlt_producer producer )
131 mlt_properties properties = MLT_PRODUCER_PROPERTIES( producer );
132 char *resource = mlt_properties_get( properties, "resource" );
133 char *last_resource = mlt_properties_get( properties, "_last_resource" );
135 char *this_resource = NULL;
136 double ttl = mlt_properties_get_int( properties, "ttl" );
137 mlt_position position = mlt_producer_position( producer );
138 SDL_Surface *surface = mlt_properties_get_data( properties, "_surface", NULL );
139 mlt_properties filenames = mlt_properties_get_data( properties, "_filenames", NULL );
141 if ( filenames == NULL )
143 filenames = parse_file_names( resource );
144 mlt_properties_set_data( properties, "_surface", surface, 0, ( mlt_destructor )SDL_FreeSurface, 0 );
147 if ( mlt_properties_count( filenames ) )
149 image_idx = ( int )floor( ( double )position / ttl ) % mlt_properties_count( filenames );
150 this_resource = mlt_properties_get_value( filenames, image_idx );
152 if ( surface == NULL || last_resource == NULL || strcmp( last_resource, this_resource ) )
154 surface = IMG_Load( this_resource );
155 if ( surface != NULL )
157 surface->refcount ++;
158 mlt_properties_set_data( properties, "_surface", surface, 0, ( mlt_destructor )SDL_FreeSurface, 0 );
159 mlt_properties_set( properties, "_last_resource", this_resource );
160 mlt_properties_set_int( properties, "meta.media.width", surface->w );
161 mlt_properties_set_int( properties, "meta.media.height", surface->h );
164 else if ( surface != NULL )
166 surface->refcount ++;
173 static int producer_get_frame( mlt_producer producer, mlt_frame_ptr frame, int index )
176 *frame = mlt_frame_init( MLT_PRODUCER_SERVICE( producer ) );
178 if ( *frame != NULL )
180 // Create the surface for the current image
181 SDL_Surface *surface = load_image( producer );
183 if ( surface != NULL )
185 // Obtain properties of frame and producer
186 mlt_properties properties = MLT_FRAME_PROPERTIES( *frame );
188 // Obtain properties of producer
189 mlt_properties producer_props = MLT_PRODUCER_PROPERTIES( producer );
191 // Update timecode on the frame we're creating
192 mlt_frame_set_position( *frame, mlt_producer_position( producer ) );
194 // Set producer-specific frame properties
195 mlt_properties_set_int( properties, "progressive", 1 );
196 mlt_properties_set_double( properties, "aspect_ratio", mlt_properties_get_double( producer_props, "aspect_ratio" ) );
197 mlt_properties_set_data( properties, "surface", surface, 0, ( mlt_destructor )SDL_FreeSurface, NULL );
199 // Push the get_image method
200 mlt_frame_push_get_image( *frame, producer_get_image );
204 // Calculate the next timecode
205 mlt_producer_prepare_next( producer );
210 static void producer_close( mlt_producer producer )
212 producer->close = NULL;
213 mlt_producer_close( producer );
217 mlt_producer producer_sdl_image_init( mlt_profile profile, mlt_service_type type, const char *id, char *file )
219 mlt_producer producer = calloc( 1, sizeof( struct mlt_producer_s ) );
220 if ( producer != NULL && mlt_producer_init( producer, NULL ) == 0 )
222 // Get the properties interface
223 mlt_properties properties = MLT_PRODUCER_PROPERTIES( producer );
225 // Callback registration
226 producer->get_frame = producer_get_frame;
227 producer->close = ( mlt_destructor )producer_close;
229 // Set the default properties
230 mlt_properties_set( properties, "resource", file );
231 mlt_properties_set( properties, "_resource", "" );
232 mlt_properties_set_double( properties, "aspect_ratio", 1 );
233 mlt_properties_set_int( properties, "ttl", 25 );
234 mlt_properties_set_int( properties, "progressive", 1 );
236 // Validate the resource
237 SDL_Surface *surface = NULL;
238 if ( file && ( surface = load_image( producer ) ) )
240 SDL_FreeSurface( surface );
241 mlt_properties_set_data( properties, "_surface", NULL, 0, NULL, NULL );
245 producer_close( producer );