private void doPlay(AudioFormat decodedFormat, AudioInputStream audioIn) throws Exception {
byte[] data = new byte[4096];
SourceDataLine localLine = line;
if (localLine != null) {
// Start
line.start();
int nBytesRead = 0;
while (nBytesRead != -1) {
// if this line was stopped, return to caller who will do cleanup
// no space to write - busy wait until available - no need to wait if play was stopped i.e.
// line closed
while (localLine.available() == 0 && localLine.isOpen()) ;
if (!localLine.isOpen()) break;
// how much space is available to write on the line
// don't read more than that
int available = localLine.available();
int maxBytesToRead = (available < data.length) ? available : data.length;
nBytesRead = audioIn.read(data, 0, maxBytesToRead);
if (nBytesRead != -1) {
localLine.write(data, 0, nBytesRead);
}
}
// Stop
// stop();
}
}
SourceDataLine getSourceDataLine(AudioFormat format, int bufferSize) {
SourceDataLine line = null;
DataLine.Info info = new DataLine.Info(SourceDataLine.class, format);
if (AudioSystem.isLineSupported(info)) {
try {
if (outputMixer == null) {
line = (SourceDataLine) AudioSystem.getLine(info);
} else {
line = (SourceDataLine) outputMixer.getLine(info);
}
// remember that time you spent, like, an entire afternoon fussing
// with this buffer size to try to get the latency decent on Linux?
// Yah, don't fuss with this anymore, ok?
line.open(format, bufferSize * format.getFrameSize() * 4);
if (line.isOpen()) {
debug(
"SourceDataLine is "
+ line.getClass().toString()
+ "\n"
+ "Buffer size is "
+ line.getBufferSize()
+ " bytes.\n"
+ "Format is "
+ line.getFormat().toString()
+ ".");
return line;
}
} catch (LineUnavailableException e) {
error("Couldn't open the line: " + e.getMessage());
}
}
error("Unable to return a SourceDataLine: unsupported format - " + format.toString());
return line;
}
public void updateVolume(int percent) {
if (out != null && out.isOpen()) {
try {
FloatControl c = (FloatControl) out.getControl(FloatControl.Type.MASTER_GAIN);
float min = c.getMinimum();
float v = percent * (c.getMaximum() - min) / 100f + min;
c.setValue(v);
} catch (IllegalArgumentException e) {
}
}
volume = percent;
}
@Override
public int onAudioData(byte[] data) {
if (audioLine != null && audioLine.isOpen()) {
if (!audioLine.isRunning()) {
audioLine.start();
}
int toWrite = Math.min(audioLine.available(), data.length);
if (toWrite == audioLine.available())
log.trace("full! toWrite: " + toWrite + " instead of: " + data.length);
return audioLine.write(data, 0, toWrite);
} else {
return 0;
}
}
/** Inits Audio ressources from AudioSystem.<br> */
protected void initLine() throws LineUnavailableException {
log.info("initLine()");
if (m_line == null) {
createLine();
}
if (!m_line.isOpen()) {
openLine();
} else {
AudioFormat lineAudioFormat = m_line.getFormat();
AudioFormat audioInputStreamFormat =
m_audioInputStream == null ? null : m_audioInputStream.getFormat();
if (!lineAudioFormat.equals(audioInputStreamFormat)) {
m_line.close();
openLine();
}
}
}
public boolean isOpen() {
return dataLine.isOpen();
}
/** Write the buffer to the SourceDataLine. */
public int process(Buffer buffer) {
// if we need to convert the format, do so using the codec.
if (codec != null) {
final int codecResult = codec.process(buffer, codecBuffer);
if (codecResult == BUFFER_PROCESSED_FAILED) return BUFFER_PROCESSED_FAILED;
if (codecResult == OUTPUT_BUFFER_NOT_FILLED) return BUFFER_PROCESSED_OK;
buffer = codecBuffer;
}
int length = buffer.getLength();
int offset = buffer.getOffset();
final Format format = buffer.getFormat();
final Class type = format.getDataType();
if (type != Format.byteArray) {
return BUFFER_PROCESSED_FAILED;
}
final byte[] data = (byte[]) buffer.getData();
final boolean bufferNotConsumed;
final int newBufferLength; // only applicable if bufferNotConsumed
final int newBufferOffset; // only applicable if bufferNotConsumed
if (NON_BLOCKING) {
// TODO: handle sourceLine.available(). This code currently causes choppy audio.
if (length > sourceLine.available()) {
// we should only write sourceLine.available() bytes, then return INPUT_BUFFER_NOT_CONSUMED.
length = sourceLine.available(); // don't try to write more than available
bufferNotConsumed = true;
newBufferLength = buffer.getLength() - length;
newBufferOffset = buffer.getOffset() + length;
} else {
bufferNotConsumed = false;
newBufferLength = length;
newBufferOffset = offset;
}
} else {
bufferNotConsumed = false;
newBufferLength = 0;
newBufferOffset = 0;
}
if (length == 0) {
logger.finer("Buffer has zero length, flags = " + buffer.getFlags());
}
// make sure all the bytes are written.
while (length > 0) {
// logger.fine("Available: " + sourceLine.available());
// logger.fine("length: " + length);
// logger.fine("sourceLine.getBufferSize(): " + sourceLine.getBufferSize());
final int n =
sourceLine.write(
data, offset, length); // TODO: this can block for a very long time if it doesn't
if (n >= length) break;
else if (n == 0) {
// TODO: we could choose to handle a write failure this way,
// assuming that it is considered legal to call stop while process is being called.
// however, that seems like a bad idea in general.
// if (!sourceLine.isRunning())
// {
// buffer.setLength(offset);
// buffer.setOffset(length);
// return INPUT_BUFFER_NOT_CONSUMED; // our write was interrupted.
// }
logger.warning(
"sourceLine.write returned 0, offset="
+ offset
+ "; length="
+ length
+ "; available="
+ sourceLine.available()
+ "; frame size in bytes"
+ sourceLine.getFormat().getFrameSize()
+ "; sourceLine.isActive() = "
+ sourceLine.isActive()
+ "; "
+ sourceLine.isOpen()
+ "; sourceLine.isRunning()="
+ sourceLine.isRunning());
return BUFFER_PROCESSED_FAILED; // sourceLine.write docs indicate that this will only happen
// if there is an error.
} else {
offset += n;
length -= n;
}
}
if (bufferNotConsumed) {
// return INPUT_BUFFER_NOT_CONSUMED if not all bytes were written
buffer.setLength(newBufferLength);
buffer.setOffset(newBufferOffset);
return INPUT_BUFFER_NOT_CONSUMED;
}
if (buffer.isEOM()) {
// TODO: the proper way to do this is to implement Drainable, and let the processor call our
// drain method.
sourceLine
.drain(); // we need to ensure that the media finishes playing, otherwise the EOM event
// will
// be posted before the media finishes playing.
}
return BUFFER_PROCESSED_OK;
}