An example of use is as follows:
- #include <time.h>
#include <mlt++/Mlt.h>
using namespace Mlt;
Producer p( "pango:" );
p.set( "text", "Hello World" );
Consumer c( "sdl" );
- Event *e = Consumer.setup_wait_for( "consumer-stopped" );
+ Event *e = c.setup_wait_for( "consumer-stopped" );
c.connect( p );
c.start( );
c.wait_for( e );
As a simple example of the Playlist in action, we'll convert the example
above into an application which plays multiple video or audio files.
- #include <time.h>
#include <mlt++/Mlt.h>
using namespace Mlt;
}
Consumer c( "sdl" );
c.connect( list );
- Event *e = Consumer.setup_wait_for( "consumer-stopped" );
+ Event *e = c.setup_wait_for( "consumer-stopped" );
c.start( );
c.wait_for( e );
delete e;
logo of some sort. We'll just use some black text on a partially
transparent red background.
- #include <time.h>
#include <mlt++/Mlt.h>
using namespace Mlt;
list.attach( f );
Consumer c( "sdl" );
c.connect( list );
- Event *e = Consumer.setup_wait_for( "consumer-stopped" );
+ Event *e = c.setup_wait_for( "consumer-stopped" );
c.start( );
c.wait_for( e );
delete e;
The tractor returned will now mix the audio from the original video and the audio.
+Events
+------
+
+ Typically, applications need to be informed when changes occur in an mlt++ object.
+ This facilitates application services such as undo/redo management, or project
+ rendering in a timeline type widget and many other types of operations which an
+ application needs.
+
+ As an example, consider the following:
+
+ class Westley
+ {
+ private:
+ Consumer consumer;
+ Tractor &tractor;
+ public:
+ Westley( MltTractor &tractor ) :
+ tractor( tractor ),
+ consumer( "westley" )
+ {
+ consumer.connect( tractor );
+ tractor.listen( tractor, "producer-changed", ( mlt_listener )Westley::listener );
+ }
+
+ static void listener( Properties *tractor, Westley *object )
+ {
+ object->activate( );
+ }
+
+ void activate( )
+ {
+ consumer.start( );
+ }
+ };
+
+
+
That's All Folks...
-------------------
include ../config.mak
CXXFLAGS = -Wall -fPIC -DPIC -pthread `mlt-config --cflags`
-LDFLAGS = `mlt-config --libs`
+LDFLAGS = `mlt-config --libs` `mlt-config miracle --libs`
INSTALL = install
TARGET = libmlt++.so
MltProperties.o \
MltService.o \
MltTractor.o \
- MltTransition.o
+ MltTransition.o \
+ MltMiracle.o
SRCS = $(OBJS:.o=.cpp)
#include "MltService.h"
#include "MltTractor.h"
#include "MltTransition.h"
+#include "MltMiracle.h"
#endif
--- /dev/null
+/**
+ * MltMiracle.cpp - MLT Wrapper
+ * Copyright (C) 2004-2005 Charles Yates
+ * Author: Charles Yates <charles.yates@pandora.be>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published
+ * by the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#include "MltMiracle.h"
+#include "MltService.h"
+using namespace Mlt;
+
+#include <time.h>
+
+static valerie_response mlt_miracle_execute( void *arg, char *command )
+{
+ Miracle *miracle = ( Miracle * )arg;
+ if ( miracle != NULL )
+ {
+ return miracle->execute( command );
+ }
+ else
+ {
+ valerie_response response = valerie_response_init( );
+ valerie_response_set_error( response, 500, "Invalid server" );
+ return response;
+ }
+}
+
+static valerie_response mlt_miracle_push( void *arg, char *command, mlt_service service )
+{
+ Miracle *miracle = ( Miracle * )arg;
+ if ( miracle != NULL )
+ {
+ Service input( service );
+ return miracle->push( command, &input );
+ }
+ else
+ {
+ valerie_response response = valerie_response_init( );
+ valerie_response_set_error( response, 500, "Invalid server" );
+ return response;
+ }
+}
+
+Miracle::Miracle( char *name, int port, char *config )
+{
+ server = miracle_server_init( name );
+ miracle_server_set_port( server, port );
+ miracle_server_set_config( server, config );
+}
+
+Miracle::~Miracle( )
+{
+ miracle_server_shutdown( server );
+}
+
+bool Miracle::start( )
+{
+ miracle_server_execute( server );
+ _real = server->parser->real;
+ _execute = server->parser->execute;
+ _push = server->parser->push;
+ server->parser->real = this;
+ server->parser->execute = mlt_miracle_execute;
+ server->parser->push = mlt_miracle_push;
+ return server->shutdown == 0;
+}
+
+bool Miracle::is_running( )
+{
+ return server->shutdown == 0;
+}
+
+valerie_response Miracle::execute( char *command )
+{
+ return _execute( _real, command );
+}
+
+valerie_response Miracle::push( char *command, Service *service )
+{
+ return _push( _real, command, service->get_service( ) );
+}
+
+void Miracle::wait_for_shutdown( )
+{
+ struct timespec tm = { 1, 0 };
+ while ( !server->shutdown )
+ nanosleep( &tm, NULL );
+}
+
--- /dev/null
+/**
+ * MltMiracle.h - MLT Wrapper
+ * Copyright (C) 2004-2005 Charles Yates
+ * Author: Charles Yates <charles.yates@pandora.be>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published
+ * by the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#ifndef _MLTPP_MIRACLE_H_
+#define _MLTPP_MIRACLE_H_
+
+#include <miracle/miracle_server.h>
+#include "MltService.h"
+
+namespace Mlt
+{
+ class Service;
+
+ class Miracle
+ {
+ private:
+ miracle_server server;
+ void *_real;
+ parser_execute _execute;
+ parser_push _push;
+ public:
+ Miracle( char *name, int port = 5250, char *config = NULL );
+ virtual ~Miracle( );
+ bool start( );
+ bool is_running( );
+ virtual valerie_response execute( char *command );
+ virtual valerie_response push( char *command, Service *service );
+ void wait_for_shutdown( );
+ };
+}
+
+#endif
+
%include <MltField.h>
%include <MltTractor.h>
%include <MltFilteredConsumer.h>
+%include <MltMiracle.h>
#if defined(SWIGRUBY)
--- /dev/null
+require 'mltpp'
+miracle = Mltpp::Miracle.new( "miracle-ruby" )
+miracle.start
+miracle.wait_for_shutdown
+
CXXFLAGS=-Wall `mlt-config --cflags` -I ../src
-LDFLAGS=--L../src -lmlt++
+LDFLAGS=-L../src -lmlt++
CC=c++
-all: play
+all: play server
-play: play.o
+play: play.o
-play.o: play.cpp
+play.o: play.cpp
+
+server: server.o
+
+server.o: server.cpp
clean:
$(RM) play play.o
+ $(RM) server server.o
install:
-#include <iostream>
-#include <string>
-using namespace std;
-
#include <Mlt.h>
using namespace Mlt;
-#include <time.h>
-
int main( int argc, char **argv )
{
Factory::init( NULL );
--- /dev/null
+#include <MltMiracle.h>
+using namespace Mlt;
+
+int main( int argc, char **argv )
+{
+ Miracle server( "miracle++" );
+ server.start( );
+ server.wait_for_shutdown( );
+ return 0;
+}
+
projects / melted / commitdiff