]> git.sesse.net Git - mlt/blob - src/mlt++/MltFilteredConsumer.cpp
Fix doc error for mlt_playlist_is_blank().
[mlt] / src / mlt++ / MltFilteredConsumer.cpp
1 /**
2  * MltFilteredConsumer.cpp - MLT Wrapper
3  * Copyright (C) 2004-2005 Charles Yates
4  * Author: Charles Yates <charles.yates@pandora.be>
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 "MltFilteredConsumer.h"
22 using namespace Mlt;
23
24 FilteredConsumer::FilteredConsumer( Profile& profile, const char *id, const char *arg ) :
25         Consumer( profile, id, arg )
26 {
27         // Create a reference to the first service
28         first = new Service( *this );
29 }
30
31 FilteredConsumer::FilteredConsumer( Consumer &consumer ) :
32         Consumer( consumer )
33 {
34         // Create a reference to the first service
35         first = new Service( *this );
36 }
37
38 FilteredConsumer::~FilteredConsumer( )
39 {
40         // Delete the reference to the first service
41         delete first;
42 }
43
44 int FilteredConsumer::connect( Service &service )
45 {
46         // All producers must connect to the first service, hence the use of the virtual here
47         return first->connect_producer( service );
48 }
49
50 int FilteredConsumer::attach( Filter &filter )
51 {
52         int error = 0;
53         if ( filter.is_valid( ) )
54         {
55                 Service *producer = first->producer( );
56                 error = filter.connect( *producer );
57                 if ( error == 0 )
58                 {
59                         first->connect_producer( filter );
60                         delete first;
61                         first = new Service( filter );
62                 }
63                 delete producer;
64         }
65         else
66         {
67                 error = 1;
68         }
69         return error;
70 }
71
72 int FilteredConsumer::last( Filter &filter )
73 {
74         int error = 0;
75         if ( filter.is_valid( ) )
76         {
77                 Service *producer = this->producer( );
78                 error = filter.connect( *producer );
79                 if ( error == 0 )
80                         connect_producer( filter );
81                 delete producer;
82         }
83         else
84         {
85                 error = 1;
86         }
87         return error;
88 }
89
90 int FilteredConsumer::detach( Filter &filter )
91 {
92         if ( filter.is_valid( ) )
93         {
94                 Service *it = new Service( *first );
95                 while ( it->is_valid( ) && it->get_service( ) != filter.get_service( ) )
96                 {
97                         Service *consumer = it->consumer( );
98                         delete it;
99                         it = consumer;
100                 }
101                 if ( it->get_service( ) == filter.get_service( ) )
102                 {
103                         Service *producer = it->producer( );
104                         Service *consumer = it->consumer( );
105                         consumer->connect_producer( *producer );
106                         Service dummy( NULL );
107                         it->connect_producer( dummy );
108                         if ( first->get_service( ) == it->get_service( ) )
109                         {
110                                 delete first;
111                                 first = new Service( *consumer );
112                         }
113                 }
114                 delete it;
115         }
116         return 0;
117 }
118