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         Mlt::Producer( tractor ),
  52         instance( tractor.get_tractor( ) )
  53 {
  54         inc_ref( );
  55 }
  56
  57 Tractor::Tractor( Profile& profile, char *id, char *resource ) :
  58         instance( NULL )
  59 {
  60         Producer producer( profile, id, resource );
  61         if ( producer.is_valid( ) && producer.type( ) == tractor_type )
  62         {
  63                 instance = ( mlt_tractor )producer.get_producer( );
  64                 inc_ref( );
  65         }
  66         else if ( producer.is_valid( ) )
  67         {
  68                 instance = mlt_tractor_new( );
  69                 set_track( producer, 0 );
  70         }
  71 }
  72
  73 Tractor::~Tractor( )
  74 {
  75         mlt_tractor_close( instance );
  76 }
  77
  78 mlt_tractor Tractor::get_tractor( )
  79 {
  80         return instance;
  81 }
  82
  83 mlt_producer Tractor::get_producer( )
  84 {
  85         return mlt_tractor_producer( get_tractor( ) );
  86 }
  87
  88 Multitrack *Tractor::multitrack( )
  89 {
  90         return new Multitrack( mlt_tractor_multitrack( get_tractor( ) ) );
  91 }
  92
  93 Field *Tractor::field( )
  94 {
  95         return new Field( mlt_tractor_field( get_tractor( ) ) );
  96 }
  97
  98 void Tractor::refresh( )
  99 {
 100         return mlt_tractor_refresh( get_tractor( ) );
 101 }
 102
 103 int Tractor::set_track( Producer &producer, int index )
 104 {
 105         return mlt_tractor_set_track( get_tractor( ), producer.get_producer( ), index );
 106 }
 107
 108 Producer *Tractor::track( int index )
 109 {
 110         mlt_producer producer = mlt_tractor_get_track( get_tractor( ), index );
 111         return producer != NULL ? new Producer( producer ) : NULL;
 112 }
 113
 114 int Tractor::count( )
 115 {
 116         return mlt_multitrack_count( mlt_tractor_multitrack( get_tractor( ) ) );
 117 }
 118
 119 void Tractor::plant_transition( Transition &transition, int a_track, int b_track )
 120 {
 121         mlt_field_plant_transition( mlt_tractor_field( get_tractor( ) ), transition.get_transition( ), a_track, b_track );
 122 }
 123
 124 void Tractor::plant_transition( Transition *transition, int a_track, int b_track )
 125 {
 126         if ( transition != NULL )
 127                 mlt_field_plant_transition( mlt_tractor_field( get_tractor( ) ), transition->get_transition( ), a_track, b_track );
 128 }
 129
 130 void Tractor::plant_filter( Filter &filter, int track )
 131 {
 132         mlt_field_plant_filter( mlt_tractor_field( get_tractor( ) ), filter.get_filter( ), track );
 133 }
 134
 135 void Tractor::plant_filter( Filter *filter, int track )
 136 {
 137         mlt_field_plant_filter( mlt_tractor_field( get_tractor( ) ), filter->get_filter( ), track );
 138 }
 139
 140 bool Tractor::locate_cut( Producer *producer, int &track, int &cut )
 141 {
 142         bool found = false;
 143
 144         for ( track = 0; producer != NULL && !found && track < count( ); track ++ )
 145         {
 146                 Playlist playlist( ( mlt_playlist )mlt_tractor_get_track( get_tractor( ), track ) );
 147                 for ( cut = 0; !found && cut < playlist.count( ); cut ++ )
 148                 {
 149                         Producer *clip = playlist.get_clip( cut );
 150                         found = producer->get_producer( ) == clip->get_producer( );
 151                         delete clip;
 152                 }
 153         }
 154
 155         track --;
 156         cut --;
 157
 158         return found;
 159 }