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 );
74 *image = mlt_pool_alloc( image_size );
75 memcpy( *image, converted->pixels, image_size );
80 SDL_FreeSurface( converted );
83 mlt_frame_set_image( frame, *image, image_size, mlt_pool_release );
88 static int filter_files( const struct dirent *de )
90 return de->d_name[ 0 ] != '.';
93 static mlt_properties parse_file_names( char *resource )
95 mlt_properties properties = mlt_properties_new( );
97 if ( strstr( resource, "/.all." ) != NULL )
99 char *dir_name = strdup( resource );
100 char *extension = strrchr( resource, '.' );
101 *( strstr( dir_name, "/.all." ) + 1 ) = '\0';
102 char fullname[ 1024 ];
103 strcpy( fullname, dir_name );
104 struct dirent **de = NULL;
105 int n = scandir( fullname, &de, filter_files, alphasort );
109 for (i = 0; i < n; i++ )
111 snprintf( fullname, 1023, "%s%s", dir_name, de[i]->d_name );
112 if ( strstr( fullname, extension ) && lstat( fullname, &info ) == 0 &&
113 ( S_ISREG( info.st_mode ) || info.st_mode | S_IXUSR ) )
116 sprintf( temp, "%d", i );
117 mlt_properties_set( properties, temp, fullname );
127 mlt_properties_set( properties, "0", resource );
133 static SDL_Surface *load_image( mlt_producer producer )
135 mlt_properties properties = MLT_PRODUCER_PROPERTIES( producer );
136 char *resource = mlt_properties_get( properties, "resource" );
137 char *last_resource = mlt_properties_get( properties, "_last_resource" );
139 char *this_resource = NULL;
140 double ttl = mlt_properties_get_int( properties, "ttl" );
141 mlt_position position = mlt_producer_position( producer );
142 SDL_Surface *surface = mlt_properties_get_data( properties, "_surface", NULL );
143 mlt_properties filenames = mlt_properties_get_data( properties, "_filenames", NULL );
145 if ( filenames == NULL )
147 filenames = parse_file_names( resource );
148 mlt_properties_set_data( properties, "_surface", surface, 0, ( mlt_destructor )SDL_FreeSurface, 0 );
151 if ( mlt_properties_count( filenames ) )
153 image_idx = ( int )floor( ( double )position / ttl ) % mlt_properties_count( filenames );
154 this_resource = mlt_properties_get_value( filenames, image_idx );
156 if ( surface == NULL || last_resource == NULL || strcmp( last_resource, this_resource ) )
158 surface = IMG_Load( this_resource );
159 if ( surface != NULL )
161 surface->refcount ++;
162 mlt_properties_set_data( properties, "_surface", surface, 0, ( mlt_destructor )SDL_FreeSurface, 0 );
163 mlt_properties_set( properties, "_last_resource", this_resource );
164 mlt_properties_set_int( properties, "_real_width", surface->w );
165 mlt_properties_set_int( properties, "_real_height", surface->h );
168 else if ( surface != NULL )
170 surface->refcount ++;
177 static int producer_get_frame( mlt_producer producer, mlt_frame_ptr frame, int index )
180 *frame = mlt_frame_init( MLT_PRODUCER_SERVICE( producer ) );
182 if ( *frame != NULL )
184 // Create the surface for the current image
185 SDL_Surface *surface = load_image( producer );
187 if ( surface != NULL )
189 // Obtain properties of frame and producer
190 mlt_properties properties = MLT_FRAME_PROPERTIES( *frame );
192 // Obtain properties of producer
193 mlt_properties producer_props = MLT_PRODUCER_PROPERTIES( producer );
195 // Update timecode on the frame we're creating
196 mlt_frame_set_position( *frame, mlt_producer_position( producer ) );
198 // Set producer-specific frame properties
199 mlt_properties_set_int( properties, "progressive", 1 );
200 mlt_properties_set_double( properties, "aspect_ratio", mlt_properties_get_double( producer_props, "aspect_ratio" ) );
201 mlt_properties_set_data( properties, "surface", surface, 0, ( mlt_destructor )SDL_FreeSurface, NULL );
202 mlt_properties_set_int( properties, "real_width", surface->w );
203 mlt_properties_set_int( properties, "real_height", surface->h );
205 // Push the get_image method
206 mlt_frame_push_get_image( *frame, producer_get_image );
210 // Calculate the next timecode
211 mlt_producer_prepare_next( producer );
216 static void producer_close( mlt_producer producer )
218 producer->close = NULL;
219 mlt_producer_close( producer );
223 mlt_producer producer_sdl_image_init( mlt_profile profile, mlt_service_type type, const char *id, char *file )
225 mlt_producer producer = calloc( 1, sizeof( struct mlt_producer_s ) );
226 if ( producer != NULL && mlt_producer_init( producer, NULL ) == 0 )
228 // Get the properties interface
229 mlt_properties properties = MLT_PRODUCER_PROPERTIES( producer );
231 // Callback registration
232 producer->get_frame = producer_get_frame;
233 producer->close = ( mlt_destructor )producer_close;
235 // Set the default properties
236 mlt_properties_set( properties, "resource", file );
237 mlt_properties_set( properties, "_resource", "" );
238 mlt_properties_set_double( properties, "aspect_ratio", 1 );
239 mlt_properties_set_int( properties, "ttl", 25 );
240 mlt_properties_set_int( properties, "progressive", 1 );
242 // Validate the resource
243 SDL_Surface *surface = NULL;
244 if ( file && ( surface = load_image( producer ) ) )
246 SDL_FreeSurface( surface );
247 mlt_properties_set_data( properties, "_surface", NULL, 0, NULL, NULL );
251 producer_close( producer );