2 * mlt_property.c -- property class
3 * Copyright (C) 2003-2004 Ushodaya Enterprises Limited
4 * Author: Charles Yates <charles.yates@pandora.be>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program 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
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software Foundation,
18 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
23 #include "mlt_property.h"
29 /** Construct and uninitialised property.
32 mlt_property mlt_property_init( )
34 return calloc( sizeof( struct mlt_property_s ), 1 );
40 void mlt_property_clear( mlt_property this )
42 // Special case data handling
43 if ( this->types & mlt_prop_data && this->destructor != NULL )
44 this->destructor( this->data );
46 // Special case string handling
47 if ( this->types & mlt_prop_string )
48 free( this->prop_string );
50 // We can wipe it now.
51 memset( this, 0, sizeof( struct mlt_property_s ) );
54 /** Set an int on this property.
57 int mlt_property_set_int( mlt_property this, int value )
59 mlt_property_clear( this );
60 this->types = mlt_prop_int;
61 this->prop_int = value;
65 /** Set a double on this property.
68 int mlt_property_set_double( mlt_property this, double value )
70 mlt_property_clear( this );
71 this->types = mlt_prop_double;
72 this->prop_double = value;
76 /** Set a timecode on this property.
79 int mlt_property_set_timecode( mlt_property this, mlt_timecode value )
81 mlt_property_clear( this );
82 this->types = mlt_prop_timecode;
83 this->prop_timecode = value;
87 /** Set a string on this property.
90 int mlt_property_set_string( mlt_property this, char *value )
92 mlt_property_clear( this );
93 this->types = mlt_prop_string;
95 this->prop_string = strdup( value );
96 return this->prop_string != NULL;
99 /** Set a data on this property.
102 int mlt_property_set_data( mlt_property this, void *value, int length, mlt_destructor destructor, mlt_serialiser serialiser )
104 if ( this->data == value )
105 this->destructor = NULL;
106 mlt_property_clear( this );
107 this->types = mlt_prop_data;
109 this->length = length;
110 this->destructor = destructor;
111 this->serialiser = serialiser;
115 /** Get an int from this property.
118 int mlt_property_get_int( mlt_property this )
120 if ( this->types & mlt_prop_int )
121 return this->prop_int;
122 else if ( this->types & mlt_prop_double )
123 return ( int )this->prop_double;
124 else if ( this->types & mlt_prop_timecode )
125 return ( int )this->prop_timecode;
126 else if ( this->types & mlt_prop_string )
127 return atoi( this->prop_string );
131 /** Get a double from this property.
134 double mlt_property_get_double( mlt_property this )
136 if ( this->types & mlt_prop_double )
137 return this->prop_double;
138 else if ( this->types & mlt_prop_int )
139 return ( double )this->prop_int;
140 else if ( this->types & mlt_prop_timecode )
141 return ( double )this->prop_timecode;
142 else if ( this->types & mlt_prop_string )
143 return atof( this->prop_string );
147 /** Get a timecode from this property.
150 mlt_timecode mlt_property_get_timecode( mlt_property this )
152 if ( this->types & mlt_prop_timecode )
153 return this->prop_timecode;
154 else if ( this->types & mlt_prop_int )
155 return ( mlt_timecode )this->prop_int;
156 else if ( this->types & mlt_prop_double )
157 return ( mlt_timecode )this->prop_double;
158 else if ( this->types & mlt_prop_string )
159 return ( mlt_timecode )atof( this->prop_string );
163 /** Get a string from this property.
166 char *mlt_property_get_string( mlt_property this )
168 // Construct a string if need be
169 if ( ! ( this->types & mlt_prop_string ) )
171 if ( this->types & mlt_prop_int )
173 this->types |= mlt_prop_string;
174 this->prop_string = malloc( 32 );
175 sprintf( this->prop_string, "%d", this->prop_int );
177 else if ( this->types & mlt_prop_double )
179 this->types |= mlt_prop_string;
180 this->prop_string = malloc( 32 );
181 sprintf( this->prop_string, "%e", this->prop_double );
183 else if ( this->types & mlt_prop_timecode )
185 this->types |= mlt_prop_string;
186 this->prop_string = malloc( 32 );
187 sprintf( this->prop_string, "%e", this->prop_timecode );
189 else if ( this->types & mlt_prop_data && this->serialiser != NULL )
191 this->types |= mlt_prop_string;
192 this->prop_string = this->serialiser( this->data, this->length );
196 // Return the string (may be NULL)
197 return this->prop_string;
200 /** Get a data and associated length.
203 void *mlt_property_get_data( mlt_property this, int *length )
205 // Assign length if not NULL
206 if ( length != NULL )
207 *length = this->length;
209 // Return the data (note: there is no conversion here)
213 /** Close this property.
216 void mlt_property_close( mlt_property this )
218 mlt_property_clear( this );