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;