1 /**
2 * MltFilteredProducer.cpp - MLT Wrapper
3 * Copyright (C) 2004-2015 Meltytech, LLC
4 * Author: Charles Yates <charles.yates@gmail.com>
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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21 #include "MltFilteredProducer.h"
22 #include "MltProfile.h"
23 using namespace Mlt;
24
FilteredProducer(Profile & profile,const char * id,const char * arg)25 FilteredProducer::FilteredProducer( Profile& profile, const char *id, const char *arg ) :
26 Producer( profile, id, arg )
27 {
28 // Create a reference to the last service
29 last = new Service( *this );
30 }
31
~FilteredProducer()32 FilteredProducer::~FilteredProducer( )
33 {
34 // Delete the reference to the last service
35 delete last;
36 }
37
attach(Filter & filter)38 int FilteredProducer::attach( Filter &filter )
39 {
40 int error = 0;
41 if ( filter.is_valid( ) )
42 {
43 Service *consumer = last->consumer( );
44 filter.connect_producer( *last );
45 if ( consumer->is_valid( ) )
46 consumer->connect_producer( filter );
47 delete consumer;
48 delete last;
49 last = new Service( filter );
50 }
51 else
52 {
53 error = 1;
54 }
55 return error;
56 }
57
detach(Filter & filter)58 int FilteredProducer::detach( Filter &filter )
59 {
60 if ( filter.is_valid( ) )
61 {
62 Service *it = new Service( *last );
63 while ( it->is_valid( ) && it->get_service( ) != filter.get_service( ) )
64 {
65 Service *producer = it->producer( );
66 delete it;
67 it = producer;
68 }
69 if ( it->get_service( ) == filter.get_service( ) )
70 {
71 Service *producer = it->producer( );
72 Service *consumer = it->consumer( );
73 if ( consumer->is_valid( ) )
74 consumer->connect_producer( *producer );
75 Profile p( get_profile() );
76 Producer dummy( p, "colour" );
77 dummy.connect_producer( *it );
78 if ( last->get_service( ) == it->get_service( ) )
79 {
80 delete last;
81 last = new Service( *producer );
82 }
83 }
84 delete it;
85 }
86 return 0;
87 }
88
89