research.m1stereo.tv/gitweb/ - melted/blob - mlt++/src/MltTractor.cpp

   1 /**
   2  * MltTractor.cpp - Tractor wrapper
   3  * Copyright (C) 2004-2005 Charles Yates
   4  * Author: Charles Yates <charles.yates@pandora.be>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU Lesser General Public License as published
   8  * by the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  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.
  15  *
  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.
  19  */
  20
  21 #include "MltTractor.h"
  22 #include "MltMultitrack.h"
  23 #include "MltField.h"
  24 #include "MltTransition.h"
  25 #include "MltFilter.h"
  26 #include "MltPlaylist.h"
  27 using namespace Mlt;
  28
  29 Tractor::Tractor( ) :
  30         instance( mlt_tractor_new( ) )
  31 {
  32 }
  33
  34 Tractor::Tractor( Service &tractor ) :
  35         instance( NULL )
  36 {
  37         if ( tractor.type( ) == tractor_type )
  38         {
  39                 instance = ( mlt_tractor )tractor.get_service( );
  40                 inc_ref( );
  41         }
  42 }
  43
  44 Tractor::Tractor( mlt_tractor tractor ) :
  45         instance( tractor )
  46 {
  47         inc_ref( );
  48 }
  49
  50 Tractor::Tractor( Tractor &tractor ) :
  51         instance( tractor.get_tractor( ) )
  52 {
  53         inc_ref( );
  54 }
  55
  56 Tractor::Tractor( char *id, char *resource ) :
  57         instance( NULL )
  58 {
  59         Producer producer( id, resource );
  60         if ( producer.is_valid( ) && producer.type( ) == tractor_type )
  61         {
  62                 instance = ( mlt_tractor )producer.get_producer( );
  63                 inc_ref( );
  64         }
  65         else if ( producer.is_valid( ) )
  66         {
  67                 instance = mlt_tractor_new( );
  68                 set_track( producer, 0 );
  69         }
  70 }
  71
  72 Tractor::~Tractor( )
  73 {
  74         mlt_tractor_close( instance );
  75 }
  76
  77 mlt_tractor Tractor::get_tractor( )
  78 {
  79         return instance;
  80 }
  81
  82 mlt_producer Tractor::get_producer( )
  83 {
  84         return mlt_tractor_producer( get_tractor( ) );
  85 }
  86
  87 Multitrack *Tractor::multitrack( )
  88 {
  89         return new Multitrack( mlt_tractor_multitrack( get_tractor( ) ) );
  90 }
  91
  92 Field *Tractor::field( )
  93 {
  94         return new Field( mlt_tractor_field( get_tractor( ) ) );
  95 }
  96
  97 void Tractor::refresh( )
  98 {
  99         return mlt_tractor_refresh( get_tractor( ) );
 100 }
 101
 102 int Tractor::set_track( Producer &producer, int index )
 103 {
 104         return mlt_tractor_set_track( get_tractor( ), producer.get_producer( ), index );
 105 }
 106
 107 Producer *Tractor::track( int index )
 108 {
 109         mlt_producer producer = mlt_tractor_get_track( get_tractor( ), index );
 110         return producer != NULL ? new Producer( producer ) : NULL;
 111 }
 112
 113 int Tractor::count( )
 114 {
 115         return mlt_multitrack_count( mlt_tractor_multitrack( get_tractor( ) ) );
 116 }
 117
 118 void Tractor::plant_transition( Transition &transition, int a_track, int b_track )
 119 {
 120         mlt_field_plant_transition( mlt_tractor_field( get_tractor( ) ), transition.get_transition( ), a_track, b_track );
 121 }
 122
 123 void Tractor::plant_transition( Transition *transition, int a_track, int b_track )
 124 {
 125         if ( transition != NULL )
 126                 mlt_field_plant_transition( mlt_tractor_field( get_tractor( ) ), transition->get_transition( ), a_track, b_track );
 127 }
 128
 129 void Tractor::plant_filter( Filter &filter, int track )
 130 {
 131         mlt_field_plant_filter( mlt_tractor_field( get_tractor( ) ), filter.get_filter( ), track );
 132 }
 133
 134 void Tractor::plant_filter( Filter *filter, int track )
 135 {
 136         mlt_field_plant_filter( mlt_tractor_field( get_tractor( ) ), filter->get_filter( ), track );
 137 }
 138
 139 bool Tractor::locate_cut( Producer *producer, int &track, int &cut )
 140 {
 141         bool found = false;
 142
 143         for ( track = 0; producer != NULL && !found && track < count( ); track ++ )
 144         {
 145                 Playlist playlist( ( mlt_playlist )mlt_tractor_get_track( get_tractor( ), track ) );
 146                 for ( cut = 0; !found && cut < playlist.count( ); cut ++ )
 147                 {
 148                         Producer *clip = playlist.get_clip( cut );
 149                         found = producer->get_producer( ) == clip->get_producer( );
 150                         delete clip;
 151                 }
 152         }
 153
 154         track --;
 155         cut --;
 156
 157         return found;
 158 }