2 * mlt_profile.c -- video output definition
3 * Copyright (C) 2007 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 "mlt_profile.h"
22 #include "mlt_factory.h"
23 #include "mlt_properties.h"
29 #define PROFILES_DIR "/share/mlt/profiles/"
31 static mlt_profile profile
= NULL
;
33 /** Get the current profile
34 * Builds one for PAL DV if non-existing
37 mlt_profile
mlt_profile_get( )
41 profile
= calloc( 1, sizeof( struct mlt_profile_s
) );
44 mlt_environment_set( "MLT_PROFILE", "dv_pal" );
45 profile
->description
= strdup( "PAL 4:3 DV or DVD" );
46 profile
->frame_rate_num
= 25;
47 profile
->frame_rate_den
= 1;
49 profile
->height
= 576;
50 profile
->progressive
= 0;
51 profile
->sample_aspect_num
= 59;
52 profile
->sample_aspect_den
= 54;
53 profile
->display_aspect_num
= 4;
54 profile
->display_aspect_den
= 3;
61 /** Load a profile from the system folder
64 mlt_profile
mlt_profile_select( const char *name
)
66 char *filename
= NULL
;
67 const char *prefix
= getenv( "MLT_PROFILES_PATH" );
69 // Allow environment to override default behavior
72 // default behavior is to use $prefix/share/mlt/profiles
74 filename
= calloc( 1, strlen( prefix
) + strlen( PROFILES_DIR
) + strlen( name
) + 2 );
75 strcpy( filename
, prefix
);
76 if ( filename
[ strlen( filename
) - 1 ] != '/' )
77 filename
[ strlen( filename
) ] = '/';
78 strcat( filename
, PROFILES_DIR
);
82 // just use environment variable
83 filename
= calloc( 1, strlen( prefix
) + strlen( name
) + 2 );
84 strcpy( filename
, prefix
);
85 if ( filename
[ strlen( filename
) - 1 ] != '/' )
86 filename
[ strlen( filename
) ] = '/';
88 strcat( filename
, name
);
89 return mlt_profile_load_file( filename
);
92 /** Load a profile from specific file
95 mlt_profile
mlt_profile_load_file( const char *file
)
97 // Load the profile as properties
98 mlt_properties properties
= mlt_properties_load( file
);
99 if ( properties
&& mlt_properties_get_int( properties
, "width" ) )
101 mlt_profile_load_properties( properties
);
102 mlt_properties_close( properties
);
104 // Set MLT_PROFILE to basename
105 char *filename
= strdup( file
);
106 mlt_environment_set( "MLT_PROFILE", basename( filename
) );
112 mlt_properties_close( properties
);
118 // Set MLT_NORMALISATION to appease legacy modules
119 char *profile_name
= mlt_environment( "MLT_PROFILE" );
120 if ( strstr( profile_name
, "_ntsc" ) ||
121 strstr( profile_name
, "_60" ) ||
122 strstr( profile_name
, "_30" ) )
124 mlt_environment_set( "MLT_NORMALISATION", "NTSC" );
126 else if ( strstr( profile_name
, "_pal" ) ||
127 strstr( profile_name
, "_50" ) ||
128 strstr( profile_name
, "_25" ) )
130 mlt_environment_set( "MLT_NORMALISATION", "PAL" );
136 /** Load a profile from a properties object
139 mlt_profile
mlt_profile_load_properties( mlt_properties properties
)
142 profile
= calloc( 1, sizeof( struct mlt_profile_s
) );
145 if ( mlt_properties_get( properties
, "name" ) )
146 mlt_environment_set( "MLT_PROFILE", mlt_properties_get( properties
, "name" ) );
147 if ( mlt_properties_get( properties
, "description" ) )
148 profile
->description
= strdup( mlt_properties_get( properties
, "description" ) );
149 profile
->frame_rate_num
= mlt_properties_get_int( properties
, "frame_rate_num" );
150 profile
->frame_rate_den
= mlt_properties_get_int( properties
, "frame_rate_den" );
151 profile
->width
= mlt_properties_get_int( properties
, "width" );
152 profile
->height
= mlt_properties_get_int( properties
, "height" );
153 profile
->progressive
= mlt_properties_get_int( properties
, "progressive" );
154 profile
->sample_aspect_num
= mlt_properties_get_int( properties
, "sample_aspect_num" );
155 profile
->sample_aspect_den
= mlt_properties_get_int( properties
, "sample_aspect_den" );
156 profile
->display_aspect_num
= mlt_properties_get_int( properties
, "display_aspect_num" );
157 profile
->display_aspect_den
= mlt_properties_get_int( properties
, "display_aspect_den" );
162 /** Load an anonymous profile from string
165 mlt_profile
mlt_profile_load_string( const char *string
)
167 mlt_properties properties
= mlt_properties_new();
170 const char *p
= string
;
173 if ( strcmp( p
, "" ) && p
[ 0 ] != '#' )
174 mlt_properties_parse( properties
, p
);
175 p
= strchr( p
, '\n' );
179 return mlt_profile_load_properties( properties
);
182 /** Get the framerate as float
185 double mlt_profile_fps( mlt_profile aprofile
)
188 return ( double ) aprofile
->frame_rate_num
/ aprofile
->frame_rate_den
;
190 return ( double ) mlt_profile_get()->frame_rate_num
/ mlt_profile_get()->frame_rate_den
;
193 /** Get the sample aspect ratio as float
196 double mlt_profile_sar( mlt_profile aprofile
)
199 return ( double ) aprofile
->sample_aspect_num
/ aprofile
->sample_aspect_den
;
201 return ( double ) mlt_profile_get()->sample_aspect_num
/ mlt_profile_get()->sample_aspect_den
;
204 /** Get the display aspect ratio as float
207 double mlt_profile_dar( mlt_profile aprofile
)
210 return ( double ) aprofile
->display_aspect_num
/ aprofile
->display_aspect_den
;
212 return ( double ) mlt_profile_get()->display_aspect_num
/ mlt_profile_get()->display_aspect_den
;
215 /** Free up the global profile resources
218 void mlt_profile_close( )
222 if ( profile
->description
)
223 free( profile
->description
);
224 profile
->description
= NULL
;