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;
}
private void startSpeaker(AudioFormat format) throws LineUnavailableException {
speaker.open(format, bufferSize);
int actualBufferSize = speaker.getBufferSize();
if (bufferSize != actualBufferSize) {
Logger.println(
"Speaker set buffer to " + bufferSize + " but actual size is " + actualBufferSize);
bufferSize = actualBufferSize;
}
if (Logger.logLevel >= Logger.LOG_MOREINFO) {
Logger.println(
"Speaker using "
+ getBufferSizeMillis(actualBufferSize)
+ " millisecond buffer "
+ actualBufferSize
+ " bytes");
}
speaker.start();
flush();
// println("speaker started");
}
public int getFramePosition() {
long timeSinceLastPositionSet = System.currentTimeMillis() - timelastPositionSet;
int size = dataLine.getBufferSize() * (format.getChannels() / 2) / bufferUpdateFactor;
int framesSinceLast =
(int) ((timeSinceLastPositionSet / 1000f) * dataLine.getFormat().getFrameRate());
int framesRemainingTillTime = size - framesSinceLast;
return framePosition - framesRemainingTillTime;
}
public SourceDataLine getOutputLine(AudioFormat format) throws LineUnavailableException {
SourceDataLine out;
DataLine.Info info = new DataLine.Info(SourceDataLine.class, format);
out = (SourceDataLine) mixer.getLine(info);
out.open(format, out.getBufferSize());
return out;
}
/** @see com.groovemanager.thread.ProgressThread#init() */
protected void init() throws InitException {
analysisLine = unit.getAnalysisLine();
try {
analysisLine.open();
} catch (LineUnavailableException e) {
e.printStackTrace();
cancelOperation();
}
if (!in.getFormat().equals(analysisLine.getFormat())) {
if (AudioSystem.isConversionSupported(analysisLine.getFormat(), in.getFormat()))
in = AudioSystem.getAudioInputStream(analysisLine.getFormat(), in);
else
throw new InitException(
"Unable to process audio data:\nConversion from "
+ in.getFormat()
+ " to "
+ analysisLine.getFormat()
+ " not supported.");
}
buffer = new byte[analysisLine.getBufferSize()];
}
/** Opens the line. */
protected void openLine() throws LineUnavailableException {
if (m_line != null) {
AudioFormat audioFormat = m_audioInputStream.getFormat();
int buffersize = lineBufferSize;
if (buffersize <= 0) {
buffersize = m_line.getBufferSize();
}
m_lineCurrentBufferSize = buffersize;
m_line.open(audioFormat, buffersize);
log.info("Open Line : BufferSize=" + buffersize);
/*-- Display supported controls --*/
Control[] c = m_line.getControls();
for (int p = 0; p < c.length; p++) {
log.info("Controls : " + c[p].toString());
}
/*-- Is Gain Control supported ? --*/
if (m_line.isControlSupported(FloatControl.Type.MASTER_GAIN)) {
m_gainControl = (FloatControl) m_line.getControl(FloatControl.Type.MASTER_GAIN);
log.info(
"Master Gain Control : ["
+ m_gainControl.getMinimum()
+ ","
+ m_gainControl.getMaximum()
+ "] "
+ m_gainControl.getPrecision());
}
/*-- Is Pan control supported ? --*/
if (m_line.isControlSupported(FloatControl.Type.PAN)) {
m_panControl = (FloatControl) m_line.getControl(FloatControl.Type.PAN);
log.info(
"Pan Control : ["
+ m_panControl.getMinimum()
+ ","
+ m_panControl.getMaximum()
+ "] "
+ m_panControl.getPrecision());
}
}
}
public int getBufferSize() {
return dataLine.getBufferSize();
}
/**
* Main loop.
*
* <p>Player Status == STOPPED || SEEKING => End of Thread + Freeing Audio Ressources.<br>
* Player Status == PLAYING => Audio stream data sent to Audio line.<br>
* Player Status == PAUSED => Waiting for another status.
*/
public void run() {
log.info("Thread Running");
int nBytesRead = 1;
byte[] abData = new byte[EXTERNAL_BUFFER_SIZE];
int readIndex = 0; // 所有读进缓冲区的数量
int writeIndex = 0; // 所有写出数量
// Lock stream while playing.
synchronized (m_audioInputStream) {
boolean buffering = false;
// Main play/pause loop.
while ((nBytesRead != -1)
&& (m_status != STOPPED)
&& (m_status != SEEKING)
&& (m_status != UNKNOWN)) {
if (m_status == PLAYING) {
// Play.
try {
nBytesRead = m_audioInputStream.read(abData, 0, abData.length);
if (nBytesRead >= 0) {
byte[] pcm = new byte[nBytesRead];
System.arraycopy(abData, 0, pcm, 0, nBytesRead);
if (m_line.available() >= m_line.getBufferSize()) {
// buffering = true;
log.fine("缓冲区空虚 : " + m_line.available() + "/" + m_line.getBufferSize());
}
// if(m_line.available()==0){
// buffering=false;
// }
if (buffering == false) {
int nBytesWritten = m_line.write(abData, 0, nBytesRead);
// Compute position in bytes in encoded stream.
int nEncodedBytes = getEncodedStreamPosition();
// Notify listeners
Iterator<BasicPlayerListener> it = laucher.getBasicPlayerListeners().iterator();
while (it.hasNext()) {
BasicPlayerListener bpl = it.next();
if (m_audioInputStream instanceof PropertiesContainer) {
// Pass audio parameters such as instant bitrate, ...
Map properties = ((PropertiesContainer) m_audioInputStream).properties();
bpl.progress(nEncodedBytes, m_line.getMicrosecondPosition(), pcm, properties);
} else {
bpl.progress(nEncodedBytes, m_line.getMicrosecondPosition(), pcm, empty_map);
}
}
}
}
} catch (IOException e) {
log.log(Level.SEVERE, "Thread cannot run()", e);
m_status = STOPPED;
notifyEvent(BasicPlayerEvent.STOPPED, getEncodedStreamPosition(), -1, null);
}
// Nice CPU usage.
if (threadSleep > 0) {
try {
Thread.sleep(threadSleep);
} catch (InterruptedException e) {
log.log(Level.SEVERE, "Thread cannot sleep(" + threadSleep + ")", e);
}
}
} else {
synchronized (m_audioInputStream) {
try {
log.log(Level.INFO, "状态是不正在播放,要无限期的等待了.....");
m_audioInputStream.wait();
log.log(Level.INFO, "状态改过来了,等待被唤醒了.......");
} catch (InterruptedException ex) {
Logger.getLogger(BasicPlayer.class.getName()).log(Level.SEVERE, null, ex);
}
}
// Pause
// try {
// Thread.sleep(500);
// } catch (InterruptedException e) {
// log.log(Level.SEVERE, "Thread cannot sleep(500)", e);
// }
}
}
// Free audio resources.
if (m_line != null) {
m_line.drain();
m_line.stop();
m_line.close();
m_line = null;
}
// Notification of "End Of Media"
if (nBytesRead == -1) {
notifyEvent(BasicPlayerEvent.EOM, getEncodedStreamPosition(), -1, null);
}
// Close stream.
closeStream();
}
m_status = STOPPED;
notifyEvent(BasicPlayerEvent.STOPPED, getEncodedStreamPosition(), -1, null);
log.info("Thread completed");
}
/**
* Single audio channel playback with automatic starting and stopping of the underlying
* sourcedataline specified by the mixer and mixer channel arguments.
*
* <p>Maintains an internal non-blocking audio packet queue and processes this queue 25 times a
* second (every 40 ms).
*
* @param threadPoolManager for assigning buffer processing schedule task
* @param mixer to obtain source data line
* @param mixerChannel either mono or left/right stereo
* @param audioFormat to use during playback
* @param lineInfo to use when obtaining the source data line
* @param requestedBufferSize of approximately 1 second of audio
*/
public AudioOutput(
ThreadPoolManager threadPoolManager,
Mixer mixer,
MixerChannel mixerChannel,
AudioFormat audioFormat,
Line.Info lineInfo,
int requestedBufferSize) {
mThreadPoolManager = threadPoolManager;
mMixer = mixer;
mMixerChannel = mixerChannel;
try {
mOutput = (SourceDataLine) mMixer.getLine(lineInfo);
if (mOutput != null) {
mOutput.open(audioFormat, requestedBufferSize);
// Start threshold: buffer is full with 10% or less of capacity remaining
mBufferStartThreshold = (int) (mOutput.getBufferSize() * 0.10);
// Stop threshold: buffer is empty with 90% or more capacity available
mBufferStopThreshold = (int) (mOutput.getBufferSize() * 0.90);
mOutput.addLineListener(this);
if (mOutput != null) {
try {
Control gain = mOutput.getControl(FloatControl.Type.MASTER_GAIN);
mGainControl = (FloatControl) gain;
} catch (IllegalArgumentException iae) {
mLog.warn(
"Couldn't obtain MASTER GAIN control for stereo line ["
+ mixer.getMixerInfo().getName()
+ " | "
+ getChannelName()
+ "]");
}
try {
Control mute = mOutput.getControl(BooleanControl.Type.MUTE);
mMuteControl = (BooleanControl) mute;
} catch (IllegalArgumentException iae) {
mLog.warn(
"Couldn't obtain MUTE control for stereo line ["
+ mixer.getMixerInfo().getName()
+ " | "
+ getChannelName()
+ "]");
}
/* Run the queue processor task every 40 milliseconds or 25 times a second */
mProcessorTask =
mThreadPoolManager.scheduleFixedRate(
ThreadType.AUDIO_PROCESSING, new BufferProcessor(), 40, TimeUnit.MILLISECONDS);
}
mAudioStartEvent = new AudioEvent(AudioEvent.Type.AUDIO_STARTED, getChannelName());
mAudioStopEvent = new AudioEvent(AudioEvent.Type.AUDIO_STOPPED, getChannelName());
mCanProcessAudio = true;
}
} catch (LineUnavailableException e) {
mLog.error(
"Couldn't obtain audio source data line for "
+ "audio output - mixer ["
+ mMixer.getMixerInfo().getName()
+ "]");
}
}
