Java Code Examples for com.google.android.exoplayer2.util.Util#toLowerInvariant()

/**
 * Parses the format info from a 'Format:' line in the [V4+ Styles] section.
 *
 * @return the parsed info, or null if {@code styleFormatLine} doesn't contain 'name'.
 */
@Nullable
public static Format fromFormatLine(String styleFormatLine) {
  int nameIndex = C.INDEX_UNSET;
  int alignmentIndex = C.INDEX_UNSET;
  String[] keys =
      TextUtils.split(styleFormatLine.substring(SsaDecoder.FORMAT_LINE_PREFIX.length()), ",");
  for (int i = 0; i < keys.length; i++) {
    switch (Util.toLowerInvariant(keys[i].trim())) {
      case "name":
        nameIndex = i;
        break;
      case "alignment":
        alignmentIndex = i;
        break;
    }
  }
  return nameIndex != C.INDEX_UNSET ? new Format(nameIndex, alignmentIndex, keys.length) : null;
}
 

@VisibleForTesting
/* package */ Metadata decode(String metadata) {
  @Nullable String name = null;
  @Nullable String url = null;
  int index = 0;
  Matcher matcher = METADATA_ELEMENT.matcher(metadata);
  while (matcher.find(index)) {
    String key = Util.toLowerInvariant(matcher.group(1));
    String value = matcher.group(2);
    switch (key) {
      case STREAM_KEY_NAME:
        name = value;
        break;
      case STREAM_KEY_URL:
        url = value;
        break;
    }
    index = matcher.end();
  }
  return new Metadata(new IcyInfo(metadata, name, url));
}
 

@VisibleForTesting
/* package */ Metadata decode(String metadata) {
  String name = null;
  String url = null;
  int index = 0;
  Matcher matcher = METADATA_ELEMENT.matcher(metadata);
  while (matcher.find(index)) {
    String key = Util.toLowerInvariant(matcher.group(1));
    String value = matcher.group(2);
    switch (key) {
      case STREAM_KEY_NAME:
        name = value;
        break;
      case STREAM_KEY_URL:
        url = value;
        break;
    }
    index = matcher.end();
  }
  return new Metadata(new IcyInfo(metadata, name, url));
}
 

@SuppressLint("WrongConstant")
@C.ContentType
public static int inferContentType(String fileName, @Nullable String overrideExtension) {
    fileName = Util.toLowerInvariant(fileName);
    if (fileName.startsWith("rtmp:")) {
        return TYPE_RTMP;
    } else {
        return inferContentType(Uri.parse(fileName), overrideExtension);
    }
}
 

private static ApicFrame decodeApicFrame(ParsableByteArray id3Data, int frameSize,
    int majorVersion) throws UnsupportedEncodingException {
  int encoding = id3Data.readUnsignedByte();
  String charset = getCharsetName(encoding);

  byte[] data = new byte[frameSize - 1];
  id3Data.readBytes(data, 0, frameSize - 1);

  String mimeType;
  int mimeTypeEndIndex;
  if (majorVersion == 2) {
    mimeTypeEndIndex = 2;
    mimeType = "image/" + Util.toLowerInvariant(new String(data, 0, 3, "ISO-8859-1"));
    if ("image/jpg".equals(mimeType)) {
      mimeType = "image/jpeg";
    }
  } else {
    mimeTypeEndIndex = indexOfZeroByte(data, 0);
    mimeType = Util.toLowerInvariant(new String(data, 0, mimeTypeEndIndex, "ISO-8859-1"));
    if (mimeType.indexOf('/') == -1) {
      mimeType = "image/" + mimeType;
    }
  }

  int pictureType = data[mimeTypeEndIndex + 1] & 0xFF;

  int descriptionStartIndex = mimeTypeEndIndex + 2;
  int descriptionEndIndex = indexOfEos(data, descriptionStartIndex, encoding);
  String description = new String(data, descriptionStartIndex,
      descriptionEndIndex - descriptionStartIndex, charset);

  int pictureDataStartIndex = descriptionEndIndex + delimiterLength(encoding);
  byte[] pictureData = copyOfRangeIfValid(data, pictureDataStartIndex, data.length);

  return new ApicFrame(mimeType, description, pictureType, pictureData);
}
 

private static ApicFrame decodeApicFrame(ParsableByteArray id3Data, int frameSize,
    int majorVersion) throws UnsupportedEncodingException {
  int encoding = id3Data.readUnsignedByte();
  String charset = getCharsetName(encoding);

  byte[] data = new byte[frameSize - 1];
  id3Data.readBytes(data, 0, frameSize - 1);

  String mimeType;
  int mimeTypeEndIndex;
  if (majorVersion == 2) {
    mimeTypeEndIndex = 2;
    mimeType = "image/" + Util.toLowerInvariant(new String(data, 0, 3, "ISO-8859-1"));
    if ("image/jpg".equals(mimeType)) {
      mimeType = "image/jpeg";
    }
  } else {
    mimeTypeEndIndex = indexOfZeroByte(data, 0);
    mimeType = Util.toLowerInvariant(new String(data, 0, mimeTypeEndIndex, "ISO-8859-1"));
    if (mimeType.indexOf('/') == -1) {
      mimeType = "image/" + mimeType;
    }
  }

  int pictureType = data[mimeTypeEndIndex + 1] & 0xFF;

  int descriptionStartIndex = mimeTypeEndIndex + 2;
  int descriptionEndIndex = indexOfEos(data, descriptionStartIndex, encoding);
  String description = new String(data, descriptionStartIndex,
      descriptionEndIndex - descriptionStartIndex, charset);

  int pictureDataStartIndex = descriptionEndIndex + delimiterLength(encoding);
  byte[] pictureData = copyOfRangeIfValid(data, pictureDataStartIndex, data.length);

  return new ApicFrame(mimeType, description, pictureType, pictureData);
}
 

/**
 * Parses a format line.
 *
 * @param formatLine The line to parse.
 */
private void parseFormatLine(String formatLine) {
  String[] values = TextUtils.split(formatLine.substring(FORMAT_LINE_PREFIX.length()), ",");
  formatKeyCount = values.length;
  formatStartIndex = C.INDEX_UNSET;
  formatEndIndex = C.INDEX_UNSET;
  formatTextIndex = C.INDEX_UNSET;
  for (int i = 0; i < formatKeyCount; i++) {
    String key = Util.toLowerInvariant(values[i].trim());
    switch (key) {
      case "start":
        formatStartIndex = i;
        break;
      case "end":
        formatEndIndex = i;
        break;
      case "text":
        formatTextIndex = i;
        break;
      default:
        // Do nothing.
        break;
    }
  }
  if (formatStartIndex == C.INDEX_UNSET
      || formatEndIndex == C.INDEX_UNSET
      || formatTextIndex == C.INDEX_UNSET) {
    // Set to 0 so that parseDialogueLine skips lines until a complete format line is found.
    formatKeyCount = 0;
  }
}
 

@Override
public boolean evaluate(String contentType) {
  contentType = Util.toLowerInvariant(contentType);
  return !TextUtils.isEmpty(contentType)
      && (!contentType.contains("text") || contentType.contains("text/vtt"))
      && !contentType.contains("html") && !contentType.contains("xml");
}
 

/**
 * Parses a format line.
 *
 * @param formatLine The line to parse.
 */
private void parseFormatLine(String formatLine) {
  String[] values = TextUtils.split(formatLine.substring(FORMAT_LINE_PREFIX.length()), ",");
  formatKeyCount = values.length;
  formatStartIndex = C.INDEX_UNSET;
  formatEndIndex = C.INDEX_UNSET;
  formatTextIndex = C.INDEX_UNSET;
  for (int i = 0; i < formatKeyCount; i++) {
    String key = Util.toLowerInvariant(values[i].trim());
    switch (key) {
      case "start":
        formatStartIndex = i;
        break;
      case "end":
        formatEndIndex = i;
        break;
      case "text":
        formatTextIndex = i;
        break;
      default:
        // Do nothing.
        break;
    }
  }
  if (formatStartIndex == C.INDEX_UNSET
      || formatEndIndex == C.INDEX_UNSET
      || formatTextIndex == C.INDEX_UNSET) {
    // Set to 0 so that parseDialogueLine skips lines until a complete format line is found.
    formatKeyCount = 0;
  }
}
 

@Override
public boolean evaluate(String contentType) {
  contentType = Util.toLowerInvariant(contentType);
  return !TextUtils.isEmpty(contentType)
      && (!contentType.contains("text") || contentType.contains("text/vtt"))
      && !contentType.contains("html") && !contentType.contains("xml");
}
 

private static ApicFrame decodeApicFrame(ParsableByteArray id3Data, int frameSize,
    int majorVersion) throws UnsupportedEncodingException {
  int encoding = id3Data.readUnsignedByte();
  String charset = getCharsetName(encoding);

  byte[] data = new byte[frameSize - 1];
  id3Data.readBytes(data, 0, frameSize - 1);

  String mimeType;
  int mimeTypeEndIndex;
  if (majorVersion == 2) {
    mimeTypeEndIndex = 2;
    mimeType = "image/" + Util.toLowerInvariant(new String(data, 0, 3, "ISO-8859-1"));
    if ("image/jpg".equals(mimeType)) {
      mimeType = "image/jpeg";
    }
  } else {
    mimeTypeEndIndex = indexOfZeroByte(data, 0);
    mimeType = Util.toLowerInvariant(new String(data, 0, mimeTypeEndIndex, "ISO-8859-1"));
    if (mimeType.indexOf('/') == -1) {
      mimeType = "image/" + mimeType;
    }
  }

  int pictureType = data[mimeTypeEndIndex + 1] & 0xFF;

  int descriptionStartIndex = mimeTypeEndIndex + 2;
  int descriptionEndIndex = indexOfEos(data, descriptionStartIndex, encoding);
  String description = new String(data, descriptionStartIndex,
      descriptionEndIndex - descriptionStartIndex, charset);

  int pictureDataStartIndex = descriptionEndIndex + delimiterLength(encoding);
  byte[] pictureData = copyOfRangeIfValid(data, pictureDataStartIndex, data.length);

  return new ApicFrame(mimeType, description, pictureType, pictureData);
}
 

/**
 * Parses the format info from a 'Format:' line in the [Events] section.
 *
 * @return the parsed info, or null if {@code formatLine} doesn't contain both 'start' and 'end'.
 */
@Nullable
public static SsaDialogueFormat fromFormatLine(String formatLine) {
  int startTimeIndex = C.INDEX_UNSET;
  int endTimeIndex = C.INDEX_UNSET;
  int styleIndex = C.INDEX_UNSET;
  int textIndex = C.INDEX_UNSET;
  Assertions.checkArgument(formatLine.startsWith(FORMAT_LINE_PREFIX));
  String[] keys = TextUtils.split(formatLine.substring(FORMAT_LINE_PREFIX.length()), ",");
  for (int i = 0; i < keys.length; i++) {
    switch (Util.toLowerInvariant(keys[i].trim())) {
      case "start":
        startTimeIndex = i;
        break;
      case "end":
        endTimeIndex = i;
        break;
      case "style":
        styleIndex = i;
        break;
      case "text":
        textIndex = i;
        break;
    }
  }
  return (startTimeIndex != C.INDEX_UNSET && endTimeIndex != C.INDEX_UNSET)
      ? new SsaDialogueFormat(startTimeIndex, endTimeIndex, styleIndex, textIndex, keys.length)
      : null;
}
 

public WebvttCssStyle setFontFamily(String fontFamily) {
  this.fontFamily = Util.toLowerInvariant(fontFamily);
  return this;
}
 

public WebvttCssStyle setFontFamily(String fontFamily) {
  this.fontFamily = Util.toLowerInvariant(fontFamily);
  return this;
}
 

/**
 * Parses a ContentProtection element.
 *
 * @param xpp The parser from which to read.
 * @throws XmlPullParserException If an error occurs parsing the element.
 * @throws IOException If an error occurs reading the element.
 * @return The scheme type and/or {@link SchemeData} parsed from the ContentProtection element.
 *     Either or both may be null, depending on the ContentProtection element being parsed.
 */
protected Pair<String, SchemeData> parseContentProtection(XmlPullParser xpp)
    throws XmlPullParserException, IOException {
  String schemeType = null;
  String licenseServerUrl = null;
  byte[] data = null;
  UUID uuid = null;
  boolean requiresSecureDecoder = false;

  String schemeIdUri = xpp.getAttributeValue(null, "schemeIdUri");
  if (schemeIdUri != null) {
    switch (Util.toLowerInvariant(schemeIdUri)) {
      case "urn:mpeg:dash:mp4protection:2011":
        schemeType = xpp.getAttributeValue(null, "value");
        String defaultKid = XmlPullParserUtil.getAttributeValueIgnorePrefix(xpp, "default_KID");
        if (!TextUtils.isEmpty(defaultKid)
            && !"00000000-0000-0000-0000-000000000000".equals(defaultKid)) {
          String[] defaultKidStrings = defaultKid.split("\\s+");
          UUID[] defaultKids = new UUID[defaultKidStrings.length];
          for (int i = 0; i < defaultKidStrings.length; i++) {
            defaultKids[i] = UUID.fromString(defaultKidStrings[i]);
          }
          data = PsshAtomUtil.buildPsshAtom(C.COMMON_PSSH_UUID, defaultKids, null);
          uuid = C.COMMON_PSSH_UUID;
        }
        break;
      case "urn:uuid:9a04f079-9840-4286-ab92-e65be0885f95":
        uuid = C.PLAYREADY_UUID;
        break;
      case "urn:uuid:edef8ba9-79d6-4ace-a3c8-27dcd51d21ed":
        uuid = C.WIDEVINE_UUID;
        break;
      default:
        break;
    }
  }

  do {
    xpp.next();
    if (XmlPullParserUtil.isStartTag(xpp, "ms:laurl")) {
      licenseServerUrl = xpp.getAttributeValue(null, "licenseUrl");
    } else if (XmlPullParserUtil.isStartTag(xpp, "widevine:license")) {
      String robustnessLevel = xpp.getAttributeValue(null, "robustness_level");
      requiresSecureDecoder = robustnessLevel != null && robustnessLevel.startsWith("HW");
    } else if (data == null
        && XmlPullParserUtil.isStartTagIgnorePrefix(xpp, "pssh")
        && xpp.next() == XmlPullParser.TEXT) {
      // The cenc:pssh element is defined in 23001-7:2015.
      data = Base64.decode(xpp.getText(), Base64.DEFAULT);
      uuid = PsshAtomUtil.parseUuid(data);
      if (uuid == null) {
        Log.w(TAG, "Skipping malformed cenc:pssh data");
        data = null;
      }
    } else if (data == null
        && C.PLAYREADY_UUID.equals(uuid)
        && XmlPullParserUtil.isStartTag(xpp, "mspr:pro")
        && xpp.next() == XmlPullParser.TEXT) {
      // The mspr:pro element is defined in DASH Content Protection using Microsoft PlayReady.
      data =
          PsshAtomUtil.buildPsshAtom(
              C.PLAYREADY_UUID, Base64.decode(xpp.getText(), Base64.DEFAULT));
    } else {
      maybeSkipTag(xpp);
    }
  } while (!XmlPullParserUtil.isEndTag(xpp, "ContentProtection"));
  SchemeData schemeData =
      uuid != null
          ? new SchemeData(
              uuid, licenseServerUrl, MimeTypes.VIDEO_MP4, data, requiresSecureDecoder)
          : null;
  return Pair.create(schemeType, schemeData);
}
 

public WebvttCssStyle setFontFamily(String fontFamily) {
  this.fontFamily = Util.toLowerInvariant(fontFamily);
  return this;
}
 

public WebvttCssStyle setFontFamily(String fontFamily) {
  this.fontFamily = Util.toLowerInvariant(fontFamily);
  return this;
}
 

public WebvttCssStyle setFontFamily(String fontFamily) {
  this.fontFamily = Util.toLowerInvariant(fontFamily);
  return this;
}
 

/**
 * Parses a ContentProtection element.
 *
 * @param xpp The parser from which to read.
 * @throws XmlPullParserException If an error occurs parsing the element.
 * @throws IOException If an error occurs reading the element.
 * @return The scheme type and/or {@link SchemeData} parsed from the ContentProtection element.
 *     Either or both may be null, depending on the ContentProtection element being parsed.
 */
protected Pair<@NullableType String, @NullableType SchemeData> parseContentProtection(
    XmlPullParser xpp) throws XmlPullParserException, IOException {
  String schemeType = null;
  String licenseServerUrl = null;
  byte[] data = null;
  UUID uuid = null;

  String schemeIdUri = xpp.getAttributeValue(null, "schemeIdUri");
  if (schemeIdUri != null) {
    switch (Util.toLowerInvariant(schemeIdUri)) {
      case "urn:mpeg:dash:mp4protection:2011":
        schemeType = xpp.getAttributeValue(null, "value");
        String defaultKid = XmlPullParserUtil.getAttributeValueIgnorePrefix(xpp, "default_KID");
        if (!TextUtils.isEmpty(defaultKid)
            && !"00000000-0000-0000-0000-000000000000".equals(defaultKid)) {
          String[] defaultKidStrings = defaultKid.split("\\s+");
          UUID[] defaultKids = new UUID[defaultKidStrings.length];
          for (int i = 0; i < defaultKidStrings.length; i++) {
            defaultKids[i] = UUID.fromString(defaultKidStrings[i]);
          }
          data = PsshAtomUtil.buildPsshAtom(C.COMMON_PSSH_UUID, defaultKids, null);
          uuid = C.COMMON_PSSH_UUID;
        }
        break;
      case "urn:uuid:9a04f079-9840-4286-ab92-e65be0885f95":
        uuid = C.PLAYREADY_UUID;
        break;
      case "urn:uuid:edef8ba9-79d6-4ace-a3c8-27dcd51d21ed":
        uuid = C.WIDEVINE_UUID;
        break;
      default:
        break;
    }
  }

  do {
    xpp.next();
    if (XmlPullParserUtil.isStartTag(xpp, "ms:laurl")) {
      licenseServerUrl = xpp.getAttributeValue(null, "licenseUrl");
    } else if (data == null
        && XmlPullParserUtil.isStartTagIgnorePrefix(xpp, "pssh")
        && xpp.next() == XmlPullParser.TEXT) {
      // The cenc:pssh element is defined in 23001-7:2015.
      data = Base64.decode(xpp.getText(), Base64.DEFAULT);
      uuid = PsshAtomUtil.parseUuid(data);
      if (uuid == null) {
        Log.w(TAG, "Skipping malformed cenc:pssh data");
        data = null;
      }
    } else if (data == null
        && C.PLAYREADY_UUID.equals(uuid)
        && XmlPullParserUtil.isStartTag(xpp, "mspr:pro")
        && xpp.next() == XmlPullParser.TEXT) {
      // The mspr:pro element is defined in DASH Content Protection using Microsoft PlayReady.
      data =
          PsshAtomUtil.buildPsshAtom(
              C.PLAYREADY_UUID, Base64.decode(xpp.getText(), Base64.DEFAULT));
    } else {
      maybeSkipTag(xpp);
    }
  } while (!XmlPullParserUtil.isEndTag(xpp, "ContentProtection"));
  SchemeData schemeData =
      uuid != null ? new SchemeData(uuid, licenseServerUrl, MimeTypes.VIDEO_MP4, data) : null;
  return Pair.create(schemeType, schemeData);
}
 

public WebvttCssStyle setFontFamily(@Nullable String fontFamily) {
  this.fontFamily = Util.toLowerInvariant(fontFamily);
  return this;
}