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" );
68 mlt_properties properties = mlt_properties_load( name );
70 // Try to load from file specification
71 if ( properties && mlt_properties_get_int( properties, "width" ) )
73 filename = calloc( 1, strlen( name ) + 1 );
75 // Load from $prefix/share/mlt/profiles
76 else if ( prefix == NULL )
79 filename = calloc( 1, strlen( prefix ) + strlen( PROFILES_DIR ) + strlen( name ) + 2 );
80 strcpy( filename, prefix );
81 if ( filename[ strlen( filename ) - 1 ] != '/' )
82 filename[ strlen( filename ) ] = '/';
83 strcat( filename, PROFILES_DIR );
85 // Use environment variable instead
88 filename = calloc( 1, strlen( prefix ) + strlen( name ) + 2 );
89 strcpy( filename, prefix );
90 if ( filename[ strlen( filename ) - 1 ] != '/' )
91 filename[ strlen( filename ) ] = '/';
95 strcat( filename, name );
96 mlt_profile_load_file( filename );
99 mlt_properties_close( properties );
105 /** Load a profile from specific file
108 mlt_profile mlt_profile_load_file( const char *file )
110 // Load the profile as properties
111 mlt_properties properties = mlt_properties_load( file );
112 if ( properties && mlt_properties_get_int( properties, "width" ) )
114 mlt_profile_load_properties( properties );
115 mlt_properties_close( properties );
117 // Set MLT_PROFILE to basename
118 char *filename = strdup( file );
119 mlt_environment_set( "MLT_PROFILE", basename( filename ) );
125 mlt_properties_close( properties );
131 // Set MLT_NORMALISATION to appease legacy modules
132 char *profile_name = mlt_environment( "MLT_PROFILE" );
133 if ( strstr( profile_name, "_ntsc" ) ||
134 strstr( profile_name, "_60" ) ||
135 strstr( profile_name, "_30" ) )
137 mlt_environment_set( "MLT_NORMALISATION", "NTSC" );
139 else if ( strstr( profile_name, "_pal" ) ||
140 strstr( profile_name, "_50" ) ||
141 strstr( profile_name, "_25" ) )
143 mlt_environment_set( "MLT_NORMALISATION", "PAL" );
149 /** Load a profile from a properties object
152 mlt_profile mlt_profile_load_properties( mlt_properties properties )
155 profile = calloc( 1, sizeof( struct mlt_profile_s ) );
158 if ( mlt_properties_get( properties, "name" ) )
159 mlt_environment_set( "MLT_PROFILE", mlt_properties_get( properties, "name" ) );
160 if ( mlt_properties_get( properties, "description" ) )
161 profile->description = strdup( mlt_properties_get( properties, "description" ) );
162 profile->frame_rate_num = mlt_properties_get_int( properties, "frame_rate_num" );
163 profile->frame_rate_den = mlt_properties_get_int( properties, "frame_rate_den" );
164 profile->width = mlt_properties_get_int( properties, "width" );
165 profile->height = mlt_properties_get_int( properties, "height" );
166 profile->progressive = mlt_properties_get_int( properties, "progressive" );
167 profile->sample_aspect_num = mlt_properties_get_int( properties, "sample_aspect_num" );
168 profile->sample_aspect_den = mlt_properties_get_int( properties, "sample_aspect_den" );
169 profile->display_aspect_num = mlt_properties_get_int( properties, "display_aspect_num" );
170 profile->display_aspect_den = mlt_properties_get_int( properties, "display_aspect_den" );
175 /** Load an anonymous profile from string
178 mlt_profile mlt_profile_load_string( const char *string )
180 mlt_properties properties = mlt_properties_new();
183 const char *p = string;
186 if ( strcmp( p, "" ) && p[ 0 ] != '#' )
187 mlt_properties_parse( properties, p );
188 p = strchr( p, '\n' );
192 return mlt_profile_load_properties( properties );
195 /** Get the framerate as float
198 double mlt_profile_fps( mlt_profile aprofile )
201 return ( double ) aprofile->frame_rate_num / aprofile->frame_rate_den;
203 return ( double ) mlt_profile_get()->frame_rate_num / mlt_profile_get()->frame_rate_den;
206 /** Get the sample aspect ratio as float
209 double mlt_profile_sar( mlt_profile aprofile )
212 return ( double ) aprofile->sample_aspect_num / aprofile->sample_aspect_den;
214 return ( double ) mlt_profile_get()->sample_aspect_num / mlt_profile_get()->sample_aspect_den;
217 /** Get the display aspect ratio as float
220 double mlt_profile_dar( mlt_profile aprofile )
223 return ( double ) aprofile->display_aspect_num / aprofile->display_aspect_den;
225 return ( double ) mlt_profile_get()->display_aspect_num / mlt_profile_get()->display_aspect_den;
228 /** Free up the global profile resources
231 void mlt_profile_close( )
235 if ( profile->description )
236 free( profile->description );
237 profile->description = NULL;