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 const char *prefix = PREFIX;
67 char *filename = calloc( 1, strlen( prefix ) + strlen( PROFILES_DIR ) + strlen( name ) + 1 );
68 strcpy( filename, prefix );
69 if ( filename[ strlen( filename ) - 1 ] != '/' )
70 filename[ strlen( filename ) ] = '/';
71 strcat( filename, PROFILES_DIR );
72 strcat( filename, name );
73 return mlt_profile_load_file( filename );
76 /** Load a profile from specific file
79 mlt_profile mlt_profile_load_file( const char *file )
81 // Load the profile as properties
82 mlt_properties properties = mlt_properties_load( file );
83 if ( properties && mlt_properties_get_int( properties, "width" ) )
85 mlt_profile_load_properties( properties );
86 mlt_properties_close( properties );
88 // Set MLT_PROFILE to basename
89 char *filename = strdup( file );
90 mlt_environment_set( "MLT_PROFILE", basename( filename ) );
96 mlt_properties_close( properties );
102 // Set MLT_NORMALISATION to appease legacy modules
103 char *profile_name = mlt_environment( "MLT_PROFILE" );
104 if ( strstr( profile_name, "_ntsc" ) ||
105 strstr( profile_name, "_atsc" ) ||
106 strstr( profile_name, "_60i" ) ||
107 strstr( profile_name, "_30p" ) )
109 mlt_environment_set( "MLT_NORMALISATION", "NTSC" );
111 else if ( strstr( profile_name, "_pal" ) ||
112 strstr( profile_name, "_50i" ) ||
113 strstr( profile_name, "_25p" ) )
115 mlt_environment_set( "MLT_NORMALISATION", "PAL" );
121 /** Load a profile from a properties object
124 mlt_profile mlt_profile_load_properties( mlt_properties properties )
127 profile = calloc( 1, sizeof( struct mlt_profile_s ) );
130 if ( mlt_properties_get( properties, "name" ) )
131 mlt_environment_set( "MLT_PROFILE", mlt_properties_get( properties, "name" ) );
132 if ( mlt_properties_get( properties, "description" ) )
133 profile->description = strdup( mlt_properties_get( properties, "description" ) );
134 profile->frame_rate_num = mlt_properties_get_int( properties, "frame_rate_num" );
135 profile->frame_rate_den = mlt_properties_get_int( properties, "frame_rate_den" );
136 profile->width = mlt_properties_get_int( properties, "width" );
137 profile->height = mlt_properties_get_int( properties, "height" );
138 profile->progressive = mlt_properties_get_int( properties, "progressive" );
139 profile->sample_aspect_num = mlt_properties_get_int( properties, "sample_aspect_num" );
140 profile->sample_aspect_den = mlt_properties_get_int( properties, "sample_aspect_den" );
141 profile->display_aspect_num = mlt_properties_get_int( properties, "display_aspect_num" );
142 profile->display_aspect_den = mlt_properties_get_int( properties, "display_aspect_den" );
147 /** Load an anonymous profile from string
150 mlt_profile mlt_profile_load_string( const char *string )
152 mlt_properties properties = mlt_properties_new();
155 const char *p = string;
158 if ( strcmp( p, "" ) && p[ 0 ] != '#' )
159 mlt_properties_parse( properties, p );
160 p = strchr( p, '\n' );
164 return mlt_profile_load_properties( properties );
167 /** Get the framerate as float
170 double mlt_profile_fps( mlt_profile aprofile )
173 return ( double ) aprofile->frame_rate_num / aprofile->frame_rate_den;
175 return ( double ) mlt_profile_get()->frame_rate_num / mlt_profile_get()->frame_rate_den;
178 /** Get the sample aspect ratio as float
181 double mlt_profile_sar( mlt_profile aprofile )
184 return ( double ) aprofile->sample_aspect_num / aprofile->sample_aspect_den;
186 return ( double ) mlt_profile_get()->sample_aspect_num / mlt_profile_get()->sample_aspect_den;
189 /** Get the display aspect ratio as float
192 double mlt_profile_dar( mlt_profile aprofile )
195 return ( double ) aprofile->display_aspect_num / aprofile->display_aspect_den;
197 return ( double ) mlt_profile_get()->display_aspect_num / mlt_profile_get()->display_aspect_den;
200 /** Free up the global profile resources
203 void mlt_profile_close( )
207 if ( profile->description )
208 free( profile->description );
209 profile->description = NULL;