/** * Loads {@link DrmInitData} for a given period in a DASH manifest. * * @param dataSource The {@link HttpDataSource} from which data should be loaded. * @param period The {@link Period}. * @return The loaded {@link DrmInitData}, or null if none is defined. * @throws IOException Thrown when there is an error while loading. * @throws InterruptedException Thrown if the thread was interrupted. */ public static @Nullable DrmInitData loadDrmInitData(DataSource dataSource, Period period) throws IOException, InterruptedException { int primaryTrackType = C.TRACK_TYPE_VIDEO; Representation representation = getFirstRepresentation(period, primaryTrackType); if (representation == null) { primaryTrackType = C.TRACK_TYPE_AUDIO; representation = getFirstRepresentation(period, primaryTrackType); if (representation == null) { return null; } } Format manifestFormat = representation.format; Format sampleFormat = DashUtil.loadSampleFormat(dataSource, primaryTrackType, representation); return sampleFormat == null ? manifestFormat.drmInitData : sampleFormat.copyWithManifestFormatInfo(manifestFormat).drmInitData; }