/**
* Returns the index with which to start parsing the next part of the string, once this method is
* done with its part
*/
private int parseVelocity(String s, int index, NoteContext context) {
// Don't compute note velocity for a rest
if (context.isRest) {
return index;
}
// Process velocity attributes, if they exist
while (index < s.length()) {
int startPoint = index + 1;
int endPoint = startPoint;
char velocityChar = s.charAt(index);
int lengthOfByte = 0;
if ((velocityChar == '+') || (velocityChar == '_') || (velocityChar == ' ')) break;
logger.info("Identified Velocity character " + velocityChar);
boolean byteDone = false;
while (!byteDone && (index + lengthOfByte + 1 < s.length())) {
char possibleByteChar = s.charAt(index + lengthOfByte + 1);
if ((possibleByteChar >= '0') && (possibleByteChar <= '9')) {
lengthOfByte++;
} else {
byteDone = true;
}
}
endPoint = index + lengthOfByte + 1;
if (startPoint == endPoint) {
return endPoint;
}
byte velocityNumber = Byte.parseByte(s.substring(startPoint, endPoint));
// Or maybe a bracketed string was passed in, instead of a byte
String velocityString = null;
if ((index + 1 < s.length()) && (s.charAt(index + 1) == '[')) {
endPoint = s.indexOf(']', startPoint) + 1;
velocityString = s.substring(startPoint, endPoint);
}
switch (velocityChar) {
case 'A':
if (velocityString == null) {
context.noteOnVelocity = velocityNumber;
} else {
context.noteOnVelocityValueAsString = velocityString;
}
context.hasNoteOnVelocity = true;
break;
case 'D':
if (velocityString == null) {
context.noteOffVelocity = velocityNumber;
} else {
context.noteOffVelocityValueAsString = velocityString;
}
context.hasNoteOffVelocity = true;
break;
default:
throw new ParserException(
StaccatoMessages.VELOCITY_CHARACTER_NOT_RECOGNIZED,
s.substring(startPoint, endPoint));
}
index = endPoint;
}
if (context.hasNoteOnVelocity) {
logger.info("Attack velocity = " + context.noteOnVelocity);
}
if (context.hasNoteOffVelocity) {
logger.info("Decay velocity = " + context.noteOffVelocity);
}
return index;
}
