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Difference between revisions of "Using OLA with Xcode"

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(Example code)
(Example code)
Line 88: Line 88:
 
 
 
 
 
  // create a select server  
 
  // create a select server  
ola::network::SelectServer server;
+
ola::network::SelectServer server;
+
// create pipe socket
+
// create pipe socket
PipeSocket *socket = new PipeSocket();
+
PipeSocket *socket = new PipeSocket();
if (!socket->Init())
+
if (!socket->Init())
{
+
{
NSLog(@"Cannot create pipe socket");
+
NSLog(@"Cannot create pipe socket");
return -1;
+
return -1;
}
+
}
+
// add socket to select server
+
// add socket to select server
server.AddSocket(socket, true);
+
server.AddSocket(socket, true);
+
// create server daemon
+
// create server daemon
 
         // *** see: olad/Olad.cpp for more detail ***
 
         // *** see: olad/Olad.cpp for more detail ***
 
+
 
     // get a client
 
     // get a client
 
  ola::OlaClient client(socket);
 
  ola::OlaClient client(socket);

Revision as of 07:30, 26 January 2010

You can use OLA to implement your application in Objective-C++, a bridge between Objective-C and C++. This page explains how to integrate OLA client into your program. The content of this page is based on OLA 0.6.0 Universal Mac Binaries

What you'll need

Configure your project

  1. Select menu: "Project" -> "Edit Project Settings". All settings below are referred in a "Build" tab
  2. Set "Architectures" to 32-bit Universal
  3. Set "Header Search Paths" to
/usr/local/include

Add dylib

  1. In your project tree, right-click on a group that contain frameworks (e.g. "External Frameworks and Libraries", "Fromeworks/Linked Frameworks"), select "Add" -> "Existing Frameworks"
  2. Select following frameworks:
    • libprotobuf.dylib
    • libola.dylib
    • libolacommon.dylib

Example code

The following code sends value 255 to channel 0 in universe 0. First, it creates a client from a SimpleClient object. Then, it creates a DMX data array and pack the array to a buffer. In the end, it sends the buffer to a server.

#import <Foundation/Foundation.h>
#include <errno.h>
#import <ola/DmxBuffer.h>
#import <ola/SimpleClient.h>

// define type for DMX message
typedef unsigned char dmx_t ;

// maximum number of channels
int MAXCHANNELS=512;

int main (int argc, const char * argv[]) {
    NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];

    // get a client
	ola::SimpleClient simpleClient;
	if (!simpleClient.Setup()) {
		NSLog(@"Client setup failed %s", strerror(errno));
		return -1;
	}
	
	ola::OlaClient *client = simpleClient.GetClient();
	
	
	// prepare data
	int channel = 0;
	dmx_t *dmx = (dmx_t *)calloc(MAXCHANNELS + 10, sizeof(dmx_t));
	dmx[channel] = 255;
	ola::DmxBuffer buffer(dmx, MAXCHANNELS);

	
	// send DMX message
	int universe = 0;
	if (!client->SendDmx(universe, buffer)) {
		NSLog(@"Sending DMX failed %s", strerror(errno));
	}
	
    [pool drain];
    return 0;
}

Notice that DMX API is changed since the last documented client API. You can find more information by browsing the source file of DMX example. For me, the src/ola-client.cpp is quite useful.

Here is another example that create OlaServer and communicate with a pipe socket.

#import <Foundation/Foundation.h>
#include <errno.h>
#import <ola/DmxBuffer.h>
#import <ola/OlaClient.h>
#import <ola/network/SelectServer.h>
#import <ola/network/Socket.h>

using ola::network::PipeSocket;

// define type for DMX message
typedef unsigned char dmx_t ;

// maximum number of channels
int MAXCHANNELS=512;

int main (int argc, const char * argv[]) {
    NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];

	// create a server 
	ola::network::SelectServer server;
	
	// create a select server 
	ola::network::SelectServer server;
	
	// create pipe socket
	PipeSocket *socket = new PipeSocket();
	if (!socket->Init())
	{
		NSLog(@"Cannot create pipe socket");
		return -1;
	}
	
	// add socket to select server
	server.AddSocket(socket, true);
	
	// create server daemon
       // *** see: olad/Olad.cpp for more detail ***

    // get a client
	ola::OlaClient client(socket);
	if (!client.Setup()) {
		NSLog(@"Client setup failed %s", strerror(errno));
		return -1;
	}
	
	// prepare data
	int channel = 0;
	dmx_t *dmx = (dmx_t *)calloc(MAXCHANNELS + 10, sizeof(dmx_t));
	dmx[channel] = 255;
	ola::DmxBuffer buffer(dmx, MAXCHANNELS);

	
	// send DMX message
	int universe = 0;
	if (!client.SendDmx(universe, buffer)) {
		NSLog(@"Sending DMX failed %s", strerror(errno));
	}
	
	// cleanup
	free(dmx);
	
    [pool drain];
    return 0;
}