Google IMA integration with OSMF?

Question

Hi there
Just wondering if anyone has had any experience integrating the Google IMA library into an OSMF, am struggling for ideas as to the best possible method.
http://code.google.com/apis/ima/docs/sdks/googleflashas3_apis.html#AdsManager
The integration requires a Video Class Object to be passed to it in order to playback a video ad, and record the impressions correctly.
As the ads are intended to be pre-rolls, I am trying to use the same Video screen of my OSMF player - but i cant get access to it from the OSMF api !
I am trying to prevent having to create a separate video class screen object just to play ads and add/remove it when necessary.
Any suggestions welcomed!
Thanks
Steve

Answer 1

Hi Steve,
Obviously can't post the whole thing as it is proprietary code for a customer, but here is a snippet; this is the play trait:
[code]
package XXXX {
import flash.net.NetStream;
import org.osmf.traits.PlayState;
import org.osmf.traits.PlayTrait;
public class GoogleIMAPlayTrait extends PlayTrait
public function GoogleIMAPlayTrait(ns:NetStream=null)
  super();
  netStream = ns;
public function get netStream():NetStream {
  return _netStream;
public function set netStream(ns:NetStream):void {
  _netStream = ns;
//   this.setCanPause(_netStream!=null);
private var _netStream:NetStream;
  * Called immediately before the <code>playState</code> property value is changed.
  * <p>Subclasses can override this method to communicate the change to the media.</p>
  *  @langversion 3.0
  *  @playerversion Flash 10
  *  @playerversion AIR 1.5
  *  @productversion OSMF 1.0
override protected function playStateChangeStart(newPlayState:String):void
  if(netStream) {
   switch(newPlayState) {
    case PlayState.PAUSED :
     netStream.pause();
     break;
    case PlayState.STOPPED :
     break;
    case PlayState.PLAYING :
     // Assume that netStream from ad has already had play start
     // so that this is just an "unpause" command
     netStream.resume();
     break;
private var paused:Boolean = false;
[/code] 
Process was quite straightforward, though, this is what I did / do:
1. Extended LoaderBase to build a GoogleIMALoader class
2. Extend LoadableElementBase to build a GoogleIMAMediaElement class
3. Implement custom traits for all the things I need to control as per the above
4. Create a MediaFactoryItem that will recognise my advert resources to map them
5. Register the MediaFactoryItem with the DefaultMediaFactory
That way, I can send advert URLs to my MediaFactory in the same way as for any other media and they will seamlessly blend into the OSMF player.
G