2 * producer_loader.c -- auto-load producer by file name extension
3 * Copyright (C) 2003-2009 Ushodaya Enterprises Limited
4 * Author: Charles Yates <charles.yates@pandora.be>
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
28 #include <framework/mlt.h>
30 static mlt_properties dictionary = NULL;
31 static mlt_properties normalisers = NULL;
33 static mlt_producer create_from( mlt_profile profile, char *file, char *services )
35 mlt_producer producer = NULL;
36 char *temp = strdup( services );
40 char *p = strchr( service, ',' );
43 producer = mlt_factory_producer( profile, service, file );
46 while ( producer == NULL && service != NULL );
51 static mlt_producer create_producer( mlt_profile profile, char *file )
53 mlt_producer result = NULL;
55 // 1st Line - check for service:resource handling
56 // And ignore drive letters on Win32 - no single char services supported.
57 if ( strchr( file, ':' ) > file + 1 )
59 char *temp = strdup( file );
61 char *resource = strchr( temp, ':' );
63 result = mlt_factory_producer( profile, service, resource );
67 // 2nd Line preferences
71 char *lookup = strdup( file );
74 // Make backup of profile for determining if we need to use 'consumer' producer.
75 mlt_profile backup_profile = mlt_profile_clone( profile );
77 // We only need to load the dictionary once
78 if ( dictionary == NULL )
81 sprintf( temp, "%s/core/loader.dict", mlt_environment( "MLT_DATA" ) );
82 dictionary = mlt_properties_load( temp );
83 mlt_factory_register_for_clean_up( dictionary, ( mlt_destructor )mlt_properties_close );
86 // Convert the lookup string to lower case
93 // Iterate through the dictionary
94 for ( i = 0; result == NULL && i < mlt_properties_count( dictionary ); i ++ )
96 char *name = mlt_properties_get_name( dictionary, i );
97 if ( fnmatch( name, lookup, 0 ) == 0 )
98 result = create_from( profile, file, mlt_properties_get_value( dictionary, i ) );
101 // Check if the producer changed the profile - xml does this.
102 // The consumer producer does not handle frame rate differences.
103 if ( result && backup_profile->is_explicit && (
104 profile->width != backup_profile->width ||
105 profile->height != backup_profile->height ||
106 profile->sample_aspect_num != backup_profile->sample_aspect_num ||
107 profile->sample_aspect_den != backup_profile->sample_aspect_den ||
108 profile->colorspace != backup_profile->colorspace ) )
110 // Restore the original profile attributes.
111 profile->display_aspect_den = backup_profile->display_aspect_den;
112 profile->display_aspect_num = backup_profile->display_aspect_num;
113 profile->frame_rate_den = backup_profile->frame_rate_den;
114 profile->frame_rate_num = backup_profile->frame_rate_num;
115 profile->height = backup_profile->height;
116 profile->progressive = backup_profile->progressive;
117 profile->sample_aspect_den = backup_profile->sample_aspect_den;
118 profile->sample_aspect_num = backup_profile->sample_aspect_num;
119 profile->width = backup_profile->width;
121 // Use the 'consumer' producer.
122 mlt_producer_close( result );
123 result = mlt_factory_producer( profile, "consumer", file );
126 mlt_profile_close( backup_profile );
130 // Finally, try just loading as service
131 if ( result == NULL )
132 result = mlt_factory_producer( profile, file, NULL );
137 static void create_filter( mlt_profile profile, mlt_producer producer, char *effect, int *created )
139 char *id = strdup( effect );
140 char *arg = strchr( id, ':' );
144 // The swscale and avcolor_space filters require resolution as arg to test compatibility
145 if ( strncmp( effect, "swscale", 7 ) == 0 || strncmp( effect, "avcolo", 6 ) == 0 )
146 arg = (char*) mlt_properties_get_int( MLT_PRODUCER_PROPERTIES( producer ), "_real_width" );
148 mlt_filter filter = mlt_factory_filter( profile, id, arg );
149 if ( filter != NULL )
151 mlt_properties_set_int( MLT_FILTER_PROPERTIES( filter ), "_loader", 1 );
152 mlt_producer_attach( producer, filter );
153 mlt_filter_close( filter );
159 static void attach_normalisers( mlt_profile profile, mlt_producer producer )
165 mlt_tokeniser tokeniser = mlt_tokeniser_init( );
167 // We only need to load the normalising properties once
168 if ( normalisers == NULL )
171 sprintf( temp, "%s/core/loader.ini", mlt_environment( "MLT_DATA" ) );
172 normalisers = mlt_properties_load( temp );
173 mlt_factory_register_for_clean_up( normalisers, ( mlt_destructor )mlt_properties_close );
177 for ( i = 0; i < mlt_properties_count( normalisers ); i ++ )
181 char *value = mlt_properties_get_value( normalisers, i );
182 mlt_tokeniser_parse_new( tokeniser, value, "," );
183 for ( j = 0; !created && j < mlt_tokeniser_count( tokeniser ); j ++ )
184 create_filter( profile, producer, mlt_tokeniser_get_string( tokeniser, j ), &created );
187 // Close the tokeniser
188 mlt_tokeniser_close( tokeniser );
191 mlt_producer producer_loader_init( mlt_profile profile, mlt_service_type type, const char *id, char *arg )
193 // Create the producer
194 mlt_producer producer = NULL;
195 mlt_properties properties = NULL;
198 producer = create_producer( profile, arg );
200 if ( producer != NULL )
201 properties = MLT_PRODUCER_PROPERTIES( producer );
203 // Attach filters if we have a producer and it isn't already xml'd :-)
204 if ( producer && strcmp( id, "abnormal" ) &&
205 mlt_properties_get( properties, "xml" ) == NULL &&
206 mlt_properties_get( properties, "_xml" ) == NULL &&
207 mlt_properties_get( properties, "loader_normalised" ) == NULL )
208 attach_normalisers( profile, producer );
212 // Always let the image and audio be converted
214 create_filter( profile, producer, "avcolor_space", &created );
216 create_filter( profile, producer, "imageconvert", &created );
217 create_filter( profile, producer, "audioconvert", &created );
220 // Now make sure we don't lose our identity
221 if ( properties != NULL )
222 mlt_properties_set_int( properties, "_mlt_service_hidden", 1 );
224 // Return the producer