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

/**
 * Returns a score for how well a language specified in a {@link Format} matches a given language.
 *
 * @param format The {@link Format}.
 * @param language The language, or null.
 * @param allowUndeterminedFormatLanguage Whether matches with an empty or undetermined format
 *     language tag are allowed.
 * @return A score of 4 if the languages match fully, a score of 3 if the languages match partly,
 *     a score of 2 if the languages don't match but belong to the same main language, a score of
 *     1 if the format language is undetermined and such a match is allowed, and a score of 0 if
 *     the languages don't match at all.
 */
protected static int getFormatLanguageScore(
    Format format, @Nullable String language, boolean allowUndeterminedFormatLanguage) {
  if (!TextUtils.isEmpty(language) && language.equals(format.language)) {
    // Full literal match of non-empty languages, including matches of an explicit "und" query.
    return 4;
  }
  language = normalizeUndeterminedLanguageToNull(language);
  String formatLanguage = normalizeUndeterminedLanguageToNull(format.language);
  if (formatLanguage == null || language == null) {
    // At least one of the languages is undetermined.
    return allowUndeterminedFormatLanguage && formatLanguage == null ? 1 : 0;
  }
  if (formatLanguage.startsWith(language) || language.startsWith(formatLanguage)) {
    // Partial match where one language is a subset of the other (e.g. "zh-hans" and "zh-hans-hk")
    return 3;
  }
  String formatMainLanguage = Util.splitAtFirst(formatLanguage, "-")[0];
  String queryMainLanguage = Util.splitAtFirst(language, "-")[0];
  if (formatMainLanguage.equals(queryMainLanguage)) {
    // Partial match where only the main language tag is the same (e.g. "fr-fr" and "fr-ca")
    return 2;
  }
  return 0;
}
 

/**
 * Returns a score for how well a language specified in a {@link Format} matches a given language.
 *
 * @param format The {@link Format}.
 * @param language The language, or null.
 * @param allowUndeterminedFormatLanguage Whether matches with an empty or undetermined format
 *     language tag are allowed.
 * @return A score of 4 if the languages match fully, a score of 3 if the languages match partly,
 *     a score of 2 if the languages don't match but belong to the same main language, a score of
 *     1 if the format language is undetermined and such a match is allowed, and a score of 0 if
 *     the languages don't match at all.
 */
protected static int getFormatLanguageScore(
    Format format, @Nullable String language, boolean allowUndeterminedFormatLanguage) {
  if (!TextUtils.isEmpty(language) && language.equals(format.language)) {
    // Full literal match of non-empty languages, including matches of an explicit "und" query.
    return 4;
  }
  language = normalizeUndeterminedLanguageToNull(language);
  String formatLanguage = normalizeUndeterminedLanguageToNull(format.language);
  if (formatLanguage == null || language == null) {
    // At least one of the languages is undetermined.
    return allowUndeterminedFormatLanguage && formatLanguage == null ? 1 : 0;
  }
  if (formatLanguage.startsWith(language) || language.startsWith(formatLanguage)) {
    // Partial match where one language is a subset of the other (e.g. "zh-hans" and "zh-hans-hk")
    return 3;
  }
  String formatMainLanguage = Util.splitAtFirst(formatLanguage, "-")[0];
  String queryMainLanguage = Util.splitAtFirst(language, "-")[0];
  if (formatMainLanguage.equals(queryMainLanguage)) {
    // Partial match where only the main language tag is the same (e.g. "fr-fr" and "fr-ca")
    return 2;
  }
  return 0;
}
 

/**
 * Returns a score for how well a language specified in a {@link Format} matches a given language.
 *
 * @param format The {@link Format}.
 * @param language The language, or null.
 * @param allowUndeterminedFormatLanguage Whether matches with an empty or undetermined format
 *     language tag are allowed.
 * @return A score of 4 if the languages match fully, a score of 3 if the languages match partly,
 *     a score of 2 if the languages don't match but belong to the same main language, a score of
 *     1 if the format language is undetermined and such a match is allowed, and a score of 0 if
 *     the languages don't match at all.
 */
protected static int getFormatLanguageScore(
    Format format, @Nullable String language, boolean allowUndeterminedFormatLanguage) {
  if (!TextUtils.isEmpty(language) && language.equals(format.language)) {
    // Full literal match of non-empty languages, including matches of an explicit "und" query.
    return 4;
  }
  language = normalizeUndeterminedLanguageToNull(language);
  String formatLanguage = normalizeUndeterminedLanguageToNull(format.language);
  if (formatLanguage == null || language == null) {
    // At least one of the languages is undetermined.
    return allowUndeterminedFormatLanguage && formatLanguage == null ? 1 : 0;
  }
  if (formatLanguage.startsWith(language) || language.startsWith(formatLanguage)) {
    // Partial match where one language is a subset of the other (e.g. "zh-hans" and "zh-hans-hk")
    return 3;
  }
  String formatMainLanguage = Util.splitAtFirst(formatLanguage, "-")[0];
  String queryMainLanguage = Util.splitAtFirst(language, "-")[0];
  if (formatMainLanguage.equals(queryMainLanguage)) {
    // Partial match where only the main language tag is the same (e.g. "fr-fr" and "fr-ca")
    return 2;
  }
  return 0;
}
 

/**
 * Parses a WebVTT timestamp.
 *
 * @param timestamp The timestamp string.
 * @return The parsed timestamp in microseconds.
 * @throws NumberFormatException If the timestamp could not be parsed.
 */
public static long parseTimestampUs(String timestamp) throws NumberFormatException {
  long value = 0;
  String[] parts = Util.splitAtFirst(timestamp, "\\.");
  String[] subparts = Util.split(parts[0], ":");
  for (String subpart : subparts) {
    value = (value * 60) + Long.parseLong(subpart);
  }
  value *= 1000;
  if (parts.length == 2) {
    value += Long.parseLong(parts[1]);
  }
  return value * 1000;
}
 

/**
 * Returns the tag name for the given tag contents.
 *
 * @param tagExpression Characters between &lt: and > of a start or end tag.
 * @return The name of tag.
 */
private static String getTagName(String tagExpression) {
  tagExpression = tagExpression.trim();
  if (tagExpression.isEmpty()) {
    return null;
  }
  return Util.splitAtFirst(tagExpression, "[ \\.]")[0];
}
 

/**
 * Parses a WebVTT timestamp.
 *
 * @param timestamp The timestamp string.
 * @return The parsed timestamp in microseconds.
 * @throws NumberFormatException If the timestamp could not be parsed.
 */
public static long parseTimestampUs(String timestamp) throws NumberFormatException {
  long value = 0;
  String[] parts = Util.splitAtFirst(timestamp, "\\.");
  String[] subparts = Util.split(parts[0], ":");
  for (String subpart : subparts) {
    value = (value * 60) + Long.parseLong(subpart);
  }
  value *= 1000;
  if (parts.length == 2) {
    value += Long.parseLong(parts[1]);
  }
  return value * 1000;
}
 

/**
 * Returns the tag name for the given tag contents.
 *
 * @param tagExpression Characters between &lt: and > of a start or end tag.
 * @return The name of tag.
 */
private static String getTagName(String tagExpression) {
  tagExpression = tagExpression.trim();
  if (tagExpression.isEmpty()) {
    return null;
  }
  return Util.splitAtFirst(tagExpression, "[ \\.]")[0];
}
 

/**
 * Parses a WebVTT timestamp.
 *
 * @param timestamp The timestamp string.
 * @return The parsed timestamp in microseconds.
 * @throws NumberFormatException If the timestamp could not be parsed.
 */
public static long parseTimestampUs(String timestamp) throws NumberFormatException {
  long value = 0;
  String[] parts = Util.splitAtFirst(timestamp, "\\.");
  String[] subparts = Util.split(parts[0], ":");
  for (String subpart : subparts) {
    value = (value * 60) + Long.parseLong(subpart);
  }
  value *= 1000;
  if (parts.length == 2) {
    value += Long.parseLong(parts[1]);
  }
  return value * 1000;
}
 

/**
 * Returns the tag name for the given tag contents.
 *
 * @param tagExpression Characters between &lt: and > of a start or end tag.
 * @return The name of tag.
 */
private static String getTagName(String tagExpression) {
  tagExpression = tagExpression.trim();
  if (tagExpression.isEmpty()) {
    return null;
  }
  return Util.splitAtFirst(tagExpression, "[ \\.]")[0];
}
 

/**
 * Parses a WebVTT timestamp.
 *
 * @param timestamp The timestamp string.
 * @return The parsed timestamp in microseconds.
 * @throws NumberFormatException If the timestamp could not be parsed.
 */
public static long parseTimestampUs(String timestamp) throws NumberFormatException {
  long value = 0;
  String[] parts = Util.splitAtFirst(timestamp, "\\.");
  String[] subparts = Util.split(parts[0], ":");
  for (String subpart : subparts) {
    value = (value * 60) + Long.parseLong(subpart);
  }
  value *= 1000;
  if (parts.length == 2) {
    value += Long.parseLong(parts[1]);
  }
  return value * 1000;
}
 

/**
 * Returns the tag name for the given tag contents.
 *
 * @param tagExpression Characters between &lt: and > of a start or end tag.
 * @return The name of tag.
 */
private static String getTagName(String tagExpression) {
  tagExpression = tagExpression.trim();
  if (tagExpression.isEmpty()) {
    return null;
  }
  return Util.splitAtFirst(tagExpression, "[ \\.]")[0];
}
 

/**
 * Parses a WebVTT timestamp.
 *
 * @param timestamp The timestamp string.
 * @return The parsed timestamp in microseconds.
 * @throws NumberFormatException If the timestamp could not be parsed.
 */
public static long parseTimestampUs(String timestamp) throws NumberFormatException {
  long value = 0;
  String[] parts = Util.splitAtFirst(timestamp, "\\.");
  String[] subparts = Util.split(parts[0], ":");
  for (String subpart : subparts) {
    value = (value * 60) + Long.parseLong(subpart);
  }
  value *= 1000;
  if (parts.length == 2) {
    value += Long.parseLong(parts[1]);
  }
  return value * 1000;
}
 

/**
 * Returns the tag name for the given tag contents.
 *
 * @param tagExpression Characters between &lt: and > of a start or end tag.
 * @return The name of tag.
 */
private static String getTagName(String tagExpression) {
  tagExpression = tagExpression.trim();
  Assertions.checkArgument(!tagExpression.isEmpty());
  return Util.splitAtFirst(tagExpression, "[ \\.]")[0];
}