/**
* 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);
}
