private void readTrack(DataInputStream dataInputStream, Track track)
throws InvalidMidiDataException, IOException {
// search for a "MTrk" chunk
while (true) {
int nMagic = dataInputStream.readInt();
if (nMagic == MidiConstants.TRACK_MAGIC) {
break;
}
int nChunkLength = dataInputStream.readInt();
if (nChunkLength % 2 != 0) {
nChunkLength++;
}
dataInputStream.skip(nChunkLength);
}
int nTrackChunkLength = dataInputStream.readInt();
long lTicks = 0;
long[] alRemainingBytes = new long[1];
alRemainingBytes[0] = nTrackChunkLength;
int[] anRunningStatusByte = new int[1];
// indicates no running status in effect
anRunningStatusByte[0] = -1;
while (alRemainingBytes[0] > 0) {
long lDeltaTicks = readVariableLengthQuantity(dataInputStream, alRemainingBytes);
// TDebug.out("delta ticks: " + lDeltaTicks);
lTicks += lDeltaTicks;
MidiEvent event = readEvent(dataInputStream, alRemainingBytes, anRunningStatusByte, lTicks);
track.add(event);
}
}
public static int readUnsignedByte(DataInputStream dataInputStream, long[] alRemainingBytes)
throws IOException {
int nByte = dataInputStream.readUnsignedByte();
// already done in DataInputStream.readUnsignedByte();
// if (nByte < 0)
// {
// throw new EOFException();
// }
alRemainingBytes[0]--;
return nByte;
}
/** Loads a Sound from an AudioInputStream. */
public Sound getSound(AudioInputStream audioStream) {
if (audioStream == null) {
return null;
}
// get the number of bytes to read
int length = (int) (audioStream.getFrameLength() * audioStream.getFormat().getFrameSize());
// read the entire stream
byte[] samples = new byte[length];
DataInputStream is = new DataInputStream(audioStream);
try {
is.readFully(samples);
is.close();
} catch (IOException ex) {
ex.printStackTrace();
}
// return the samples
return new Sound(samples);
}
public MidiFileFormat getMidiFileFormat(InputStream inputStream)
throws InvalidMidiDataException, IOException {
DataInputStream dataInputStream = new DataInputStream(inputStream);
int nHeaderMagic = dataInputStream.readInt();
if (nHeaderMagic != MidiConstants.HEADER_MAGIC) {
throw new InvalidMidiDataException("not a MIDI file: wrong header magic");
}
int nHeaderLength = dataInputStream.readInt();
if (nHeaderLength < 6) {
throw new InvalidMidiDataException("corrupt MIDI file: wrong header length");
}
int nType = dataInputStream.readShort();
if (nType < 0 || nType > 2) {
throw new InvalidMidiDataException("corrupt MIDI file: illegal type");
}
if (nType == 2) {
throw new InvalidMidiDataException("this implementation doesn't support type 2 MIDI files");
}
int nNumTracks = dataInputStream.readShort();
if (nNumTracks <= 0) {
throw new InvalidMidiDataException("corrupt MIDI file: number of tracks must be positive");
}
if (nType == 0 && nNumTracks != 1) {
throw new InvalidMidiDataException(
"corrupt MIDI file: type 0 files must contain exactely one track");
}
int nDivision = dataInputStream.readUnsignedShort();
float fDivisionType = -1.0F;
int nResolution = -1;
if ((nDivision & 0x8000) != 0) // frame division
{
int nFrameType = -((nDivision >>> 8) & 0xFF);
switch (nFrameType) {
case 24:
fDivisionType = Sequence.SMPTE_24;
break;
case 25:
fDivisionType = Sequence.SMPTE_25;
break;
case 29:
fDivisionType = Sequence.SMPTE_30DROP;
break;
case 30:
fDivisionType = Sequence.SMPTE_30;
break;
default:
throw new InvalidMidiDataException("corrupt MIDI file: illegal frame division type");
}
nResolution = nDivision & 0xff;
} else // BPM division
{
fDivisionType = Sequence.PPQ;
nResolution = nDivision & 0x7fff;
}
// skip additional bytes in the header
dataInputStream.skip(nHeaderLength - 6);
MidiFileFormat midiFileFormat =
new TMidiFileFormat(
nType,
fDivisionType,
nResolution,
MidiFileFormat.UNKNOWN_LENGTH,
MidiFileFormat.UNKNOWN_LENGTH,
nNumTracks);
return midiFileFormat;
}
public void play(String name, String version, String vendor, String desc) throws Exception {
Info port = null;
for (Info info : MidiSystem.getMidiDeviceInfo()) {
if (name == null && version == null && vendor == null && desc == null) {
System.err.println(
"At least one of name, version, vendor, or description must be specified.");
break;
}
if (name != null && !info.getName().equals(name)) {
continue;
}
if (vendor != null && !info.getVendor().equals(vendor)) {
continue;
}
if (version != null && !info.getVersion().equals(version)) {
continue;
}
if (desc != null && !info.getDescription().equals(desc)) {
continue;
}
try (MidiDevice dev = MidiSystem.getMidiDevice(info)) {
Receiver r = null;
try {
r = dev.getReceiver();
} catch (Exception e) {
r = null;
}
if (r == null) {
continue;
}
}
if (port != null) {
System.err.println(
"Multiple MIDI ports match the given parameters. Please be more specific.");
port = null;
break;
}
port = info;
continue;
}
if (port == null) {
System.err.println("Unable to locate MIDI port");
System.err.println("Available ports:");
for (Info info : MidiSystem.getMidiDeviceInfo()) {
try (MidiDevice dev = MidiSystem.getMidiDevice(info)) {
Receiver r = null;
try {
r = dev.getReceiver();
} catch (Exception e) {
r = null;
}
if (r == null) {
continue;
}
}
System.out.println(
"Device [name="
+ info.getName()
+ ", version="
+ info.getVersion()
+ ", vendor="
+ info.getVendor()
+ ", desc="
+ info.getDescription()
+ "]");
}
return;
}
System.out.println(
"Using device [name="
+ port.getName()
+ ", version="
+ port.getVersion()
+ ", vendor="
+ port.getVendor()
+ ", desc="
+ port.getDescription()
+ "]");
try (MidiDevice dev = MidiSystem.getMidiDevice(port)) {
int channel = CHANNEL_RAW_STEREO;
dev.open();
try (Receiver rx = dev.getReceiver()) {
rxCleanup = rx;
try (DataInputStream dis = new DataInputStream(new FileInputStream(ymz))) {
resetController(rx, channel, registers);
long startTime = System.nanoTime();
// read a buffer
long prevClock = 0;
while (true) {
long clock = dis.readLong();
byte register = dis.readByte();
byte value = dis.readByte();
if (prevClock != clock) {
sendAll(rx, channel, registers);
prevClock = clock;
}
sleepUntil(startTime, clock);
System.out.println(
"Clock: " + clock + " register: " + register + ", value: " + (value & 0xff));
if (register < 0 || register > 13) {
System.err.println("Invalid register " + register + " found, ignoring.");
continue;
}
registers[register] = value;
}
} catch (EOFException e) {
System.err.println("EOF reached");
} finally {
resetController(rx, channel, registers);
rxCleanup = null;
}
}
}
}
