research.m1stereo.tv/gitweb/ - melted/blob - src/framework/mlt_profile.c

   1 /*
   2  * mlt_profile.c -- video output definition
   3  * Copyright (C) 2007 Ushodaya Enterprises Limited
   4  * Author: Dan Dennedy <dan@dennedy.org>
   5  *
   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.
  10  *
  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.
  15  *
  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
  19  */
  20
  21 #include "mlt_profile.h"
  22 #include "mlt_factory.h"
  23 #include "mlt_properties.h"
  24
  25 #include <stdlib.h>
  26 #include <string.h>
  27 #include <libgen.h>
  28
  29 #define PROFILES_DIR "/share/mlt/profiles/"
  30
  31 static mlt_profile profile = NULL;
  32
  33 /** Get the current profile
  34 * Builds one for PAL DV if non-existing
  35 */
  36
  37 mlt_profile mlt_profile_get( )
  38 {
  39         if ( !profile )
  40         {
  41                 profile = calloc( 1, sizeof( struct mlt_profile_s ) );
  42                 if ( profile )
  43                 {
  44                         profile->name = strdup( "DV PAL" );
  45                         profile->frame_rate_num = 25;
  46                         profile->frame_rate_den = 1;
  47                         profile->width = 720;
  48                         profile->height = 576;
  49                         profile->progressive = 0;
  50                         profile->sample_aspect_num = 59;
  51                         profile->sample_aspect_den = 54;
  52                         profile->display_aspect_num = 4;
  53                         profile->display_aspect_den = 3;
  54                 }
  55         }
  56         return profile;
  57 }
  58
  59
  60 /** Load a profile from the system folder
  61 */
  62
  63 mlt_profile mlt_profile_select( const char *name )
  64 {
  65         const char *prefix = PREFIX;
  66         char *filename = calloc( 1, strlen( prefix ) + strlen( PROFILES_DIR ) + strlen( name ) + 1 );
  67         strcpy( filename, prefix );
  68         if ( filename[ strlen( filename ) - 1 ] != '/' )
  69                 filename[ strlen( filename ) ] = '/';
  70         strcat( filename, PROFILES_DIR );
  71         strcat( filename, name );
  72         return mlt_profile_load_file( filename );
  73 }
  74
  75 /** Load a profile from specific file
  76 */
  77
  78 mlt_profile mlt_profile_load_file( const char *file )
  79 {
  80         // Load the profile as properties
  81         mlt_properties properties = mlt_properties_load( file );
  82         if ( properties && mlt_properties_get_int( properties, "width" ) )
  83         {
  84                 mlt_profile_load_properties( properties );
  85                 if ( !profile->name )
  86                 {
  87                         char *filename = strdup( file );
  88                         profile->name = strdup( basename( filename ) );
  89                         free( filename );
  90                 }
  91         }
  92         else
  93         {
  94                 mlt_properties_close( properties );
  95                 mlt_profile_close();
  96         }
  97         return profile;
  98 }
  99
 100 /** Load a profile from a properties object
 101 */
 102
 103 mlt_profile mlt_profile_load_properties( mlt_properties properties )
 104 {
 105         mlt_profile_close();
 106         profile = calloc( 1, sizeof( struct mlt_profile_s ) );
 107         if ( profile )
 108         {
 109                 if ( mlt_properties_get( properties, "name" ) )
 110                         profile->name = mlt_properties_get( properties, "name" );
 111                 profile->frame_rate_num = mlt_properties_get_int( properties, "frame_rate_num" );
 112                 profile->frame_rate_den = mlt_properties_get_int( properties, "frame_rate_den" );
 113                 profile->width = mlt_properties_get_int( properties, "width" );
 114                 profile->height = mlt_properties_get_int( properties, "height" );
 115                 profile->progressive = mlt_properties_get_int( properties, "progressive" );
 116                 profile->sample_aspect_num = mlt_properties_get_int( properties, "sample_aspect_num" );
 117                 profile->sample_aspect_den = mlt_properties_get_int( properties, "sample_aspect_den" );
 118                 profile->display_aspect_num = mlt_properties_get_int( properties, "display_aspect_num" );
 119                 profile->display_aspect_den = mlt_properties_get_int( properties, "display_aspect_den" );
 120         }
 121         return profile;
 122 }
 123
 124 /** Load an anonymous profile from string
 125 */
 126
 127 mlt_profile mlt_profile_load_string( const char *string )
 128 {
 129         mlt_properties properties = mlt_properties_new();
 130         if ( properties )
 131         {
 132                 const char *p = string;
 133                 while ( p )
 134                 {
 135                         if ( strcmp( p, "" ) && p[ 0 ] != '#' )
 136                                 mlt_properties_parse( properties, p );
 137                         p = strchr( p, '\n' );
 138                         if ( p ) p++;
 139                 }
 140         }
 141         mlt_profile_load_properties( properties );
 142         if ( profile && !profile->name )
 143                 profile->name = strdup( "untitled" );
 144         return profile;
 145 }
 146
 147 /** Get the framerate as float
 148 */
 149
 150 double mlt_profile_fps( mlt_profile aprofile )
 151 {
 152         if ( aprofile )
 153                 return ( double ) aprofile->frame_rate_num / aprofile->frame_rate_den;
 154         else
 155                 return ( double ) mlt_profile_get()->frame_rate_num / mlt_profile_get()->frame_rate_den;
 156 }
 157
 158 /** Get the sample aspect ratio as float
 159 */
 160
 161 double mlt_profile_sar( mlt_profile aprofile )
 162 {
 163         if ( aprofile )
 164                 return ( double ) aprofile->sample_aspect_num / aprofile->sample_aspect_den;
 165         else
 166                 return ( double ) mlt_profile_get()->sample_aspect_num / mlt_profile_get()->sample_aspect_den;
 167 }
 168
 169 /** Get the display aspect ratio as float
 170 */
 171
 172 double mlt_profile_dar( mlt_profile aprofile )
 173 {
 174         if ( aprofile )
 175                 return ( double ) aprofile->display_aspect_num / aprofile->display_aspect_den;
 176         else
 177                 return ( double ) mlt_profile_get()->display_aspect_num / mlt_profile_get()->display_aspect_den;
 178 }
 179
 180 /** Free up the global profile resources
 181 */
 182
 183 void mlt_profile_close( )
 184 {
 185         if ( profile )
 186         {
 187                 if ( profile->name )
 188                         free( profile->name );
 189                 profile->name = NULL;
 190                 free( profile );
 191                 profile = NULL;
 192         }
 193 }