Java 类com.google.android.exoplayer.hls.HlsMediaPlaylist.Segment 实例源码

private static HlsMediaPlaylist parseMediaPlaylist(LineIterator iterator, Uri baseUri)
    throws IOException {
  int mediaSequence = 0;
  int targetDurationSecs = 0;
  int version = 1; // Default version == 1.
  boolean live = true;
  List<Segment> segments = new ArrayList<Segment>();

  double segmentDurationSecs = 0.0;
  boolean segmentDiscontinuity = false;
  long segmentStartTimeUs = 0;
  String segmentEncryptionMethod = null;
  String segmentEncryptionKeyUri = null;
  String segmentEncryptionIV = null;
  int segmentByterangeOffset = 0;
  int segmentByterangeLength = C.LENGTH_UNBOUNDED;

  int segmentMediaSequence = 0;

  String line;
  while (iterator.hasNext()) {
    line = iterator.next();
    if (line.startsWith(TARGET_DURATION_TAG)) {
      targetDurationSecs = HlsParserUtil.parseIntAttr(line, TARGET_DURATION_REGEX,
          TARGET_DURATION_TAG);
    } else if (line.startsWith(MEDIA_SEQUENCE_TAG)) {
      mediaSequence = HlsParserUtil.parseIntAttr(line, MEDIA_SEQUENCE_REGEX, MEDIA_SEQUENCE_TAG);
      segmentMediaSequence = mediaSequence;
    } else if (line.startsWith(VERSION_TAG)) {
      version = HlsParserUtil.parseIntAttr(line, VERSION_REGEX, VERSION_TAG);
    } else if (line.startsWith(MEDIA_DURATION_TAG)) {
      segmentDurationSecs = HlsParserUtil.parseDoubleAttr(line, MEDIA_DURATION_REGEX,
          MEDIA_DURATION_TAG);
    } else if (line.startsWith(KEY_TAG)) {
      segmentEncryptionMethod = HlsParserUtil.parseStringAttr(line, METHOD_ATTR_REGEX,
          METHOD_ATTR);
      if (segmentEncryptionMethod.equals(HlsMediaPlaylist.ENCRYPTION_METHOD_NONE)) {
        segmentEncryptionKeyUri = null;
        segmentEncryptionIV = null;
      } else {
        segmentEncryptionKeyUri = HlsParserUtil.parseStringAttr(line, URI_ATTR_REGEX,
            URI_ATTR);
        segmentEncryptionIV = HlsParserUtil.parseOptionalStringAttr(line, IV_ATTR_REGEX);
        if (segmentEncryptionIV == null) {
          segmentEncryptionIV = Integer.toHexString(segmentMediaSequence);
        }
      }
    } else if (line.startsWith(BYTERANGE_TAG)) {
      String byteRange = HlsParserUtil.parseStringAttr(line, BYTERANGE_REGEX, BYTERANGE_TAG);
      String[] splitByteRange = byteRange.split("@");
      segmentByterangeLength = Integer.parseInt(splitByteRange[0]);
      if (splitByteRange.length > 1) {
        segmentByterangeOffset = Integer.parseInt(splitByteRange[1]);
      }
    } else if (line.equals(DISCONTINUITY_TAG)) {
      segmentDiscontinuity = true;
    } else if (!line.startsWith("#")) {
      segmentMediaSequence++;
      if (segmentByterangeLength == C.LENGTH_UNBOUNDED) {
        segmentByterangeOffset = 0;
      }
      segments.add(new Segment(line, segmentDurationSecs, segmentDiscontinuity,
          segmentStartTimeUs, segmentEncryptionMethod, segmentEncryptionKeyUri,
          segmentEncryptionIV, segmentByterangeOffset, segmentByterangeLength));
      segmentStartTimeUs += (long) (segmentDurationSecs * C.MICROS_PER_SECOND);
      segmentDiscontinuity = false;
      segmentDurationSecs = 0.0;
      if (segmentByterangeLength != C.LENGTH_UNBOUNDED) {
        segmentByterangeOffset += segmentByterangeLength;
      }
      segmentByterangeLength = C.LENGTH_UNBOUNDED;
    } else if (line.equals(ENDLIST_TAG)) {
      live = false;
      break;
    }
  }
  return new HlsMediaPlaylist(baseUri, mediaSequence, targetDurationSecs, version, live,
      Collections.unmodifiableList(segments));
}