drmFun.kt

  val dashMediaSource =
             DashMediaSource.Factory(dashChunkSourceFactory, manifestDataSourceFactory)
                 .createMediaSource(
                     MediaItem.Builder()
                         .setUri(Uri.parse(url))
                          // DRM Configuration
                         .setDrmConfiguration(
                             MediaItem.DrmConfiguration.Builder(drmSchemeUuid)
                                 .setLicenseUri(drmLicenseUrl).build()
                         )
                         .setMimeType(MimeTypes.APPLICATION_MPD)
                         .setTag(null)
                         .build()
                 )