private boolean parsePlayListInfo(ElementBuilder builder, String line) {
int programId = -1;
int bandWidth = -1;
String codec = "";
String attributesList = line.substring(line.indexOf(":"));
// Iterate through the attributes string, chopping it down until we have all the values
try {
while (attributesList.length() > 0) {
// Skip the initial : or the last delimiting comma
attributesList = attributesList.substring(1);
String name = attributesList.substring(0, attributesList.indexOf('='));
int indexOfEquals = attributesList.indexOf('=');
attributesList = attributesList.substring(indexOfEquals + 1);
String value;
if (attributesList.charAt(0) == '"') {
// String component.
// Skip the initial "
attributesList = attributesList.substring(1);
int indexOfQuote = attributesList.indexOf('"');
value = attributesList.substring(0, indexOfQuote);
attributesList = attributesList.substring(indexOfQuote + 1);
} else {
int indexOfComma = attributesList.indexOf(',');
indexOfComma = indexOfComma != -1 ? indexOfComma : attributesList.length();
value = attributesList.substring(0, indexOfComma);
attributesList = attributesList.substring(indexOfComma);
}
// Check to see whether our kvp is important to us
if (name.contentEquals(PROGRAM_ID)) {
programId = Integer.parseInt(value);
} else if (name.contentEquals(CODECS)) {
codec = value;
} else if (name.contentEquals(BANDWIDTH)) {
bandWidth = Integer.parseInt(value);
} else {
log.fine("Unhandled STREAM-INF attribute " + name + " " + value);
}
}
} catch (NumberFormatException e) {
return false;
} catch (IndexOutOfBoundsException e) {
return false;
}
builder.playList(programId, bandWidth, codec);
return true;
}
private void parseExtInf(String line, int lineNumber, ElementBuilder builder)
throws ParseException {
// EXTINF:200,Title
final Matcher matcher = Patterns.EXTINF.matcher(line);
if (!matcher.find() && !matcher.matches() && matcher.groupCount() < 1) {
throw new ParseException(line, lineNumber, "EXTINF must specify at least the duration");
}
String duration = matcher.group(1);
String title = matcher.groupCount() > 1 ? matcher.group(2) : "";
try {
builder.duration(Integer.valueOf(duration)).title(title);
} catch (NumberFormatException e) {
// should not happen because of
throw new ParseException(line, lineNumber, e);
}
}
/**
* See {@link Channels#newReader(java.nio.channels.ReadableByteChannel, String)} See {@link
* java.io.StringReader}
*
* @param source the source.
* @return a playlist.
* @throws ParseException parsing fails.
*/
public Playlist parse(Readable source) throws ParseException {
final Scanner scanner = new Scanner(source);
boolean firstLine = true;
int lineNumber = 0;
final List<Element> elements = new ArrayList<Element>(10);
final ElementBuilder builder = new ElementBuilder();
boolean endListSet = false;
int targetDuration = -1;
int mediaSequenceNumber = -1;
EncryptionInfo currentEncryption = null;
while (scanner.hasNextLine()) {
String line = scanner.nextLine().trim();
if (line.length() > 0) {
if (line.startsWith(EX_PREFIX)) {
if (firstLine) {
checkFirstLine(lineNumber, line);
firstLine = false;
} else if (line.startsWith(EXTINF)) {
parseExtInf(line, lineNumber, builder);
} else if (line.startsWith(EXT_X_ENDLIST)) {
endListSet = true;
} else if (line.startsWith(EXT_X_TARGET_DURATION)) {
if (targetDuration != -1) {
throw new ParseException(line, lineNumber, EXT_X_TARGET_DURATION + " duplicated");
}
targetDuration = parseTargetDuration(line, lineNumber);
} else if (line.startsWith(EXT_X_MEDIA_SEQUENCE)) {
if (mediaSequenceNumber != -1) {
throw new ParseException(line, lineNumber, EXT_X_MEDIA_SEQUENCE + " duplicated");
}
mediaSequenceNumber = parseMediaSequence(line, lineNumber);
} else if (line.startsWith(EXT_X_PROGRAM_DATE_TIME)) {
long programDateTime = parseProgramDateTime(line, lineNumber);
builder.programDate(programDateTime);
} else if (line.startsWith(EXT_X_STREAM_INF)) {
if (!parsePlayListInfo(builder, line)) {
throw new ParseException(
line, lineNumber, "Failed to parse EXT-X-STREAM-INF element");
}
} else if (line.startsWith(EXT_X_KEY)) {
currentEncryption = parseEncryption(line, lineNumber);
} else {
log.log(Level.FINE, "Unknown: '" + line + "'");
}
} else if (line.startsWith(COMMENT_PREFIX)) {
// no first line check because comments will be ignored.
// comment do nothing
if (log.isLoggable(Level.FINEST)) {
log.log(Level.FINEST, "----- Comment: " + line);
}
} else {
if (firstLine) {
checkFirstLine(lineNumber, line);
}
// No prefix: must be the media uri.
builder.encrypted(currentEncryption);
builder.uri(toURI(line));
elements.add(builder.create());
// a new element begins.
builder.reset();
}
}
lineNumber++;
}
return new Playlist(
Collections.unmodifiableList(elements), endListSet, targetDuration, mediaSequenceNumber);
}
