I’m working on a project where I need to play two VAST ads in sequence followed by a content video using ExoPlayer in a Flutter app through a method channel. I’ve tried using ConcatenatingMediaSource() but found out that it’s deprecated. Here’s my current implementation:

private fun initializePlayer(id: Int, mainActivity: MainActivity, creationParams: Map<String?, Any?>?, methodChannel: MethodChannel) {
        val dataSourceFactory: DataSource.Factory = DefaultDataSourceFactory(playerView.context, Util.getUserAgent(playerView.context, "exo_demo"))
        val mediaSourceFactory: MediaSourceFactory = DefaultMediaSourceFactory(dataSourceFactory)
            .setAdsLoaderProvider { unusedAdTagUri: AdsConfiguration? -> adsLoader }
            .setAdViewProvider(playerView)

        trackSelector = DefaultTrackSelector(playerView.context, AdaptiveTrackSelection.Factory())

        player = ExoPlayer.Builder(playerView.context)
            .setMediaSourceFactory(mediaSourceFactory)
            .setTrackSelector(trackSelector!!)
            .build()
        player!!.preparePlayer(playerView, true, mainActivity, methodChannel)

        playerView.player = player
        adsLoader!!.setPlayer(player)
        playerView.isControllerVisible
        playerView.setShowNextButton(false)
        playerView.setShowPreviousButton(false)
        playerView.showController()
        playerView.resizeMode = AspectRatioFrameLayout.RESIZE_MODE_FIT
        playerView.controllerHideOnTouch = false     

        // Parse HLS streaming URL
        val url = creationParams as Map<String?, Any?>?
        val contentUri = Uri.parse(url?.get("videoURL") as String?)
        val contentTitle = url?.get("videoText") as String

        // Parse ad tag URI
        val adTagUri = Uri.parse("https://pubads.g.doubleclick.net/gampad/ads?iu=/21775744923/external/single_preroll_skippable&sz=640x480&ciu_szs=300x250%2C728x90&gdfp_req=1&output=vast&unviewed_position_start=1&env=vp&impl=s&correlator=")

        val adTagUri2 = Uri.parse("https://pubads.g.doubleclick.net/gampad/ads?iu=/21775744923/external/single_preroll_skippable&sz=640x480&ciu_szs=300x250%2C728x90&gdfp_req=1&output=vast&unviewed_position_start=1&env=vp&impl=s&correlator=")
        

        var adPlaybackState = AdPlaybackState(0, 500 * C.MICROS_PER_SECOND)
        adPlaybackState = adPlaybackState.withAdUri(0, 0, adTagUri)

        eventListener?.onAdPlaybackState(adPlaybackState);

        // Create MediaItem for the ad with ad configuration
        val adMediaItem = MediaItem.Builder()
            .setUri(contentUri)
            .setMimeType(MimeTypes.APPLICATION_M3U8)
            .setAdTagUri(adTagUri)
            .build()
        

        // Set the media source to the player and prepare it.
        player!!.setMediaItem(adMediaItem)
        player!!.prepare()

        player!!.setPlayWhenReady(true)

    }

However, the current implementation only plays the first ad video, and I want to play the second ad video and then the content video. How can I achieve this

Any insights or alternative approaches would be greatly appreciated!