Usar el SDK de IMA DAI en tvOS

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#import <GoogleInteractiveMediaAds/GoogleInteractiveMediaAds.h>

/// VideoStitcher VOD config ID.
static NSString *const kVODConfigID = @"VOD_CONFIG_ID";
/// VideoStitcher Network Code.
static NSString *const kNetworkCode = @"NETWORK_CODE";
/// VideoStitcher Project Number.
static NSString *const kProjectNumber = @"PROJECT_NUMBER";
/// VideoStitcher Location.
static NSString *const kLocation = @"LOCATION";
/// VideoStitcher OAuth Token.
static NSString *const kOAuthToken = @"OAUTH_TOKEN";

/// Fallback URL in case something goes wrong in loading the stream. If all goes well, this will not
/// be used.
static NSString *const kBackupStreamURLString =
    @"http://googleimadev-vh.akamaihd.net/i/big_buck_bunny/bbb-,480p,720p,1080p,.mov.csmil/"
    @"master.m3u8";

@interface ViewController () <IMAAdsLoaderDelegate, IMAStreamManagerDelegate>

...

- (void)requestStream {
    // Create an ad display container for ad rendering.
    IMAAdDisplayContainer *adDisplayContainer =
        [[IMAAdDisplayContainer alloc] initWithAdContainer:self.videoView
                                            viewController:self
                                            companionSlots:nil];
    // Create an IMAAVPlayerVideoDisplay to give the SDK access to your video player.
    IMAAVPlayerVideoDisplay *imaVideoDisplay =
        [[IMAAVPlayerVideoDisplay alloc] initWithAVPlayer:self.contentPlayer];
    IMAVideoStitcherVODStreamRequest *streamRequest =
        [[IMAVideoStitcherVODStreamRequest alloc] initWithAdTagURL:kVODConfigID
                                                            region:kLocation
                                                     projectNumber:kProjectNumber
                                                        OAuthToken:kOAuthToken
                                                       networkCode:kNetworkCode
                                                adDisplayContainer:adDisplayContainer
                                                      videoDisplay:imaVideoDisplay
                                                       userContext:nil,
                                       videoStitcherSessionOptions:nil];
    [self.adsLoader requestStreamWithRequest:streamRequest];
}

...

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class ViewController:
  UIViewController,
  IMAAdsLoaderDelegate,
  IMAStreamManagerDelegate,
  AVPlayerViewControllerDelegate
{
  /// The Stream's VOD config ID.
  static let vodConfigID = "VOD_CONFIG_ID"
  /// The Network Code used by the Video Stitcher API.
  static let networkCode = "NETWORK_CODE"
  /// The Google Cloud project using the Video Stitcher API.
  static let projectNumber = "PROJECT_NUMBER"
  /// The Google Cloud region containing your project.
  static let location = "LOCATION"
  /// An OAuth Token created by a Google Cloud account with Video Stitcher API
  /// permissions.
  static let oAuthToken = "OAUTH_TOKEN"

  /// Fallback URL in case something goes wrong in loading the stream. If all goes well, this will
  /// not be used.
  static let backupStreamURLString = """
    http://googleimadev-vh.akamaihd.net/i/big_buck_bunny/\
    bbb-,480p,720p,1080p,.mov.csmil/master.m3u8
    """

  ...

  func requestStream() {
    guard let playerViewController = self.playerViewController else { return }
    guard let adContainerView = self.adContainerView else { return }
    guard let adsLoader = self.adsLoader else { return }

    self.videoDisplay = IMAAVPlayerVideoDisplay(avPlayer: playerViewController.player!)
    adDisplayContainer = IMAAdDisplayContainer(
      adContainer: adContainerView, viewController: self)
    let streamRequest: IMAStreamRequest
    // Create a VOD stream request.
    streamRequest = IMAVideoStitcherVODStreamRequest(
      VODConfigID: ViewController.vodConfigID,
      region: ViewController.location,
      projectNumber: ViewController.projectNumber,
      oAuthToken: ViewController.oAuthToken,
      networkCode: ViewController.networkCode,
      adDisplayContainer: adDisplayContainer!,
      videoDisplay: self.videoDisplay,
      userContext: nil,
      videoStitcherSessionOptions: nil)
    adsLoader?.requestStream(with: streamRequest)
  }

  ...

 // Define session options JSON string.
 // The following session options are examples. Use session options
 // that are compatible with your video stream.
 NSString *sessionOptionsStr =
   @"{"
   "  \"manifestOptions\": {"
   "    \"bitrateOrder\": \"ascending\""
   "  }"
   "}";
 // convert JSON NSString to NSDictionary
 NSData *sessionOptionsData = [sessionOptionsStr dataUsingEncoding:NSUTF8StringEncoding];
 NSError *error = nil;
 NSDictionary *sessionOptions = [NSJSONSerialization
                       JSONObjectWithData:sessionOptionsData
                       options:0
                       error:&error];
 // make stream request
 IMAVideoStitcherVODStreamRequest *streamRequest =
     [[IMAVideoStitcherVODStreamRequest alloc] initWithVODConfigID:kVODConfigID
                                                           region:kLocation
                                                     projectNumber:kProjectNumber
                                                       OAuthToken:kOAuthToken
                                                       networkCode:kNetworkCode
                                               adDisplayContainer:adDisplayContainer
                                                     videoDisplay:imaVideoDisplay
                                                       userContext:nil
                                       videoStitcherSessionOptions:sessionOptions];
 [self.adsLoader requestStreamWithRequest:streamRequest];

 // Define session options JSON string.
 // The following session options are examples. Use session options
 // that are compatible with your video stream.
 let sessionOptionsStr = """
     {
       "manifestOptions": {
         "bitrateOrder": "ascending"
       }
     }
     """
 // convert JSON string to dictionary
 guard let sessionOptionsData = sessionOptionsStr.data(using: .utf8, allowLossyConversion: false) else { return nil }
 let sessionOptions = try? JSONSerialization.jsonObject(with: sessionOptionsData, options: .mutableContainers)
 // make stream request
 let streamRequest = IMAVideoStitcherVODStreamRequest(
   vodConfigID:ViewController.vodConfigID
   region:ViewController.location
   projectNumber:ViewController.projectNumber
   OAuthToken:ViewController.oAuthToken
   networkCode:ViewController.networkCode
   adDisplayContainer:adDisplayContainer
   videoDisplay:imaVideoDisplay
   userContext:nil
   videoStitcherSessionOptions:sessionOptions)
 adsLoader?.requestStream(with: streamRequest)