JDK8/Java8源码在线阅读
/*
* Copyright (c) 2002, 2013, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package com.sun.media.sound;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.Vector;
import javax.sound.sampled.*;
// IDEA:
// Use java.util.concurrent.Semaphore,
// java.util.concurrent.locks.ReentrantLock and other new classes/methods
// to improve this class's thread safety.
/**
* A Mixer which provides direct access to audio devices
*
* @author Florian Bomers
*/
final class DirectAudioDevice extends AbstractMixer {
// CONSTANTS
private static final int CLIP_BUFFER_TIME = 1000; // in milliseconds
private static final int DEFAULT_LINE_BUFFER_TIME = 500; // in milliseconds
// INSTANCE VARIABLES
/** number of opened lines */
private int deviceCountOpened = 0;
/** number of started lines */
private int deviceCountStarted = 0;
// CONSTRUCTOR
DirectAudioDevice(DirectAudioDeviceProvider.DirectAudioDeviceInfo portMixerInfo) {
// pass in Line.Info, mixer, controls
super(portMixerInfo, // Mixer.Info
null, // Control[]
null, // Line.Info[] sourceLineInfo
null); // Line.Info[] targetLineInfo
if (Printer.trace) Printer.trace(">> DirectAudioDevice: constructor");
// source lines
DirectDLI srcLineInfo = createDataLineInfo(true);
if (srcLineInfo != null) {
sourceLineInfo = new Line.Info[2];
// SourcedataLine
sourceLineInfo[0] = srcLineInfo;
// Clip
sourceLineInfo[1] = new DirectDLI(Clip.class, srcLineInfo.getFormats(),
srcLineInfo.getHardwareFormats(),
32, // arbitrary minimum buffer size
AudioSystem.NOT_SPECIFIED);
} else {
sourceLineInfo = new Line.Info[0];
}
// TargetDataLine
DataLine.Info dstLineInfo = createDataLineInfo(false);
if (dstLineInfo != null) {
targetLineInfo = new Line.Info[1];
targetLineInfo[0] = dstLineInfo;
} else {
targetLineInfo = new Line.Info[0];
}
if (Printer.trace) Printer.trace("<< DirectAudioDevice: constructor completed");
}
private DirectDLI createDataLineInfo(boolean isSource) {
Vector formats = new Vector();
AudioFormat[] hardwareFormatArray = null;
AudioFormat[] formatArray = null;
synchronized(formats) {
nGetFormats(getMixerIndex(), getDeviceID(),
isSource /* true:SourceDataLine/Clip, false:TargetDataLine */,
formats);
if (formats.size() > 0) {
int size = formats.size();
int formatArraySize = size;
hardwareFormatArray = new AudioFormat[size];
for (int i = 0; i < size; i++) {
AudioFormat format = (AudioFormat)formats.elementAt(i);
hardwareFormatArray[i] = format;
int bits = format.getSampleSizeInBits();
boolean isSigned = format.getEncoding().equals(AudioFormat.Encoding.PCM_SIGNED);
boolean isUnsigned = format.getEncoding().equals(AudioFormat.Encoding.PCM_UNSIGNED);
if ((isSigned || isUnsigned)) {
// will insert a magically converted format here
formatArraySize++;
}
}
formatArray = new AudioFormat[formatArraySize];
int formatArrayIndex = 0;
for (int i = 0; i < size; i++) {
AudioFormat format = hardwareFormatArray[i];
formatArray[formatArrayIndex++] = format;
int bits = format.getSampleSizeInBits();
boolean isSigned = format.getEncoding().equals(AudioFormat.Encoding.PCM_SIGNED);
boolean isUnsigned = format.getEncoding().equals(AudioFormat.Encoding.PCM_UNSIGNED);
// add convenience formats (automatic conversion)
if (bits == 8) {
// add the other signed'ness for 8-bit
if (isSigned) {
formatArray[formatArrayIndex++] =
new AudioFormat(AudioFormat.Encoding.PCM_UNSIGNED,
format.getSampleRate(), bits, format.getChannels(),
format.getFrameSize(), format.getSampleRate(),
format.isBigEndian());
}
else if (isUnsigned) {
formatArray[formatArrayIndex++] =
new AudioFormat(AudioFormat.Encoding.PCM_SIGNED,
format.getSampleRate(), bits, format.getChannels(),
format.getFrameSize(), format.getSampleRate(),
format.isBigEndian());
}
} else if (bits > 8 && (isSigned || isUnsigned)) {
// add the other endian'ness for more than 8-bit
formatArray[formatArrayIndex++] =
new AudioFormat(format.getEncoding(),
format.getSampleRate(), bits,
format.getChannels(),
format.getFrameSize(),
format.getSampleRate(),
!format.isBigEndian());
}
//System.out.println("Adding "+v.get(v.size()-1));
}
}
}
// todo: find out more about the buffer size ?
if (formatArray != null) {
return new DirectDLI(isSource?SourceDataLine.class:TargetDataLine.class,
formatArray, hardwareFormatArray,
32, // arbitrary minimum buffer size
AudioSystem.NOT_SPECIFIED);
}
return null;
}
// ABSTRACT MIXER: ABSTRACT METHOD IMPLEMENTATIONS
public Line getLine(Line.Info info) throws LineUnavailableException {
Line.Info fullInfo = getLineInfo(info);
if (fullInfo == null) {
throw new IllegalArgumentException("Line unsupported: " + info);
}
if (fullInfo instanceof DataLine.Info) {
DataLine.Info dataLineInfo = (DataLine.Info)fullInfo;
AudioFormat lineFormat;
int lineBufferSize = AudioSystem.NOT_SPECIFIED;
// if a format is specified by the info class passed in, use it.
// otherwise use a format from fullInfo.
AudioFormat[] supportedFormats = null;
if (info instanceof DataLine.Info) {
supportedFormats = ((DataLine.Info)info).getFormats();
lineBufferSize = ((DataLine.Info)info).getMaxBufferSize();
}
if ((supportedFormats == null) || (supportedFormats.length == 0)) {
// use the default format
lineFormat = null;
} else {
// use the last format specified in the line.info object passed
// in by the app
lineFormat = supportedFormats[supportedFormats.length-1];
// if something is not specified, use default format
if (!Toolkit.isFullySpecifiedPCMFormat(lineFormat)) {
lineFormat = null;
}
}
if (dataLineInfo.getLineClass().isAssignableFrom(DirectSDL.class)) {
return new DirectSDL(dataLineInfo, lineFormat, lineBufferSize, this);
}
if (dataLineInfo.getLineClass().isAssignableFrom(DirectClip.class)) {
return new DirectClip(dataLineInfo, lineFormat, lineBufferSize, this);
}
if (dataLineInfo.getLineClass().isAssignableFrom(DirectTDL.class)) {
return new DirectTDL(dataLineInfo, lineFormat, lineBufferSize, this);
}
}
throw new IllegalArgumentException("Line unsupported: " + info);
}
public int getMaxLines(Line.Info info) {
Line.Info fullInfo = getLineInfo(info);
// if it's not supported at all, return 0.
if (fullInfo == null) {
return 0;
}
if (fullInfo instanceof DataLine.Info) {
// DirectAudioDevices should mix !
return getMaxSimulLines();
}
return 0;
}
protected void implOpen() throws LineUnavailableException {
if (Printer.trace) Printer.trace("DirectAudioDevice: implOpen - void method");
}
protected void implClose() {
if (Printer.trace) Printer.trace("DirectAudioDevice: implClose - void method");
}
protected void implStart() {
if (Printer.trace) Printer.trace("DirectAudioDevice: implStart - void method");
}
protected void implStop() {
if (Printer.trace) Printer.trace("DirectAudioDevice: implStop - void method");
}
// IMPLEMENTATION HELPERS
int getMixerIndex() {
return ((DirectAudioDeviceProvider.DirectAudioDeviceInfo) getMixerInfo()).getIndex();
}
int getDeviceID() {
return ((DirectAudioDeviceProvider.DirectAudioDeviceInfo) getMixerInfo()).getDeviceID();
}
int getMaxSimulLines() {
return ((DirectAudioDeviceProvider.DirectAudioDeviceInfo) getMixerInfo()).getMaxSimulLines();
}
private static void addFormat(Vector v, int bits, int frameSizeInBytes, int channels, float sampleRate,
int encoding, boolean signed, boolean bigEndian) {
AudioFormat.Encoding enc = null;
switch (encoding) {
case PCM:
enc = signed?AudioFormat.Encoding.PCM_SIGNED:AudioFormat.Encoding.PCM_UNSIGNED;
break;
case ULAW:
enc = AudioFormat.Encoding.ULAW;
if (bits != 8) {
if (Printer.err) Printer.err("DirectAudioDevice.addFormat called with ULAW, but bitsPerSample="+bits);
bits = 8; frameSizeInBytes = channels;
}
break;
case ALAW:
enc = AudioFormat.Encoding.ALAW;
if (bits != 8) {
if (Printer.err) Printer.err("DirectAudioDevice.addFormat called with ALAW, but bitsPerSample="+bits);
bits = 8; frameSizeInBytes = channels;
}
break;
}
if (enc==null) {
if (Printer.err) Printer.err("DirectAudioDevice.addFormat called with unknown encoding: "+encoding);
return;
}
if (frameSizeInBytes <= 0) {
if (channels > 0) {
frameSizeInBytes = ((bits + 7) / 8) * channels;
} else {
frameSizeInBytes = AudioSystem.NOT_SPECIFIED;
}
}
v.add(new AudioFormat(enc, sampleRate, bits, channels, frameSizeInBytes, sampleRate, bigEndian));
}
protected static AudioFormat getSignOrEndianChangedFormat(AudioFormat format) {
boolean isSigned = format.getEncoding().equals(AudioFormat.Encoding.PCM_SIGNED);
boolean isUnsigned = format.getEncoding().equals(AudioFormat.Encoding.PCM_UNSIGNED);
if (format.getSampleSizeInBits() > 8 && isSigned) {
// if this is PCM_SIGNED and 16-bit or higher, then try with endian-ness magic
return new AudioFormat(format.getEncoding(),
format.getSampleRate(), format.getSampleSizeInBits(), format.getChannels(),
format.getFrameSize(), format.getFrameRate(), !format.isBigEndian());
}
else if (format.getSampleSizeInBits() == 8 && (isSigned || isUnsigned)) {
// if this is PCM and 8-bit, then try with signed-ness magic
return new AudioFormat(isSigned?AudioFormat.Encoding.PCM_UNSIGNED:AudioFormat.Encoding.PCM_SIGNED,
format.getSampleRate(), format.getSampleSizeInBits(), format.getChannels(),
format.getFrameSize(), format.getFrameRate(), format.isBigEndian());
}
return null;
}
// INNER CLASSES
/**
* Private inner class for the DataLine.Info objects
* adds a little magic for the isFormatSupported so
* that the automagic conversion of endianness and sign
* does not show up in the formats array.
* I.e. the formats array contains only the formats
* that are really supported by the hardware,
* but isFormatSupported() also returns true
* for formats with wrong endianness.
*/
private static final class DirectDLI extends DataLine.Info {
final AudioFormat[] hardwareFormats;
private DirectDLI(Class clazz, AudioFormat[] formatArray,
AudioFormat[] hardwareFormatArray,
int minBuffer, int maxBuffer) {
super(clazz, formatArray, minBuffer, maxBuffer);
this.hardwareFormats = hardwareFormatArray;
}
public boolean isFormatSupportedInHardware(AudioFormat format) {
if (format == null) return false;
for (int i = 0; i < hardwareFormats.length; i++) {
if (format.matches(hardwareFormats[i])) {
return true;
}
}
return false;
}
/*public boolean isFormatSupported(AudioFormat format) {
* return isFormatSupportedInHardware(format)
* || isFormatSupportedInHardware(getSignOrEndianChangedFormat(format));
*}
*/
private AudioFormat[] getHardwareFormats() {
return hardwareFormats;
}
}
/**
* Private inner class as base class for direct lines
*/
private static class DirectDL extends AbstractDataLine implements EventDispatcher.LineMonitor {
protected final int mixerIndex;
protected final int deviceID;
protected long id;
protected int waitTime;
protected volatile boolean flushing = false;
protected final boolean isSource; // true for SourceDataLine, false for TargetDataLine
protected volatile long bytePosition;
protected volatile boolean doIO = false; // true in between start() and stop() calls
protected volatile boolean stoppedWritten = false; // true if a write occurred in stopped state
protected volatile boolean drained = false; // set to true when drain function returns, set to false in write()
protected boolean monitoring = false;
// if native needs to manually swap samples/convert sign, this
// is set to the framesize
protected int softwareConversionSize = 0;
protected AudioFormat hardwareFormat;
private final Gain gainControl = new Gain();
private final Mute muteControl = new Mute();
private final Balance balanceControl = new Balance();
private final Pan panControl = new Pan();
private float leftGain, rightGain;
protected volatile boolean noService = false; // do not run the nService method
// Guards all native calls.
protected final Object lockNative = new Object();
// CONSTRUCTOR
protected DirectDL(DataLine.Info info,
DirectAudioDevice mixer,
AudioFormat format,
int bufferSize,
int mixerIndex,
int deviceID,
boolean isSource) {
super(info, mixer, null, format, bufferSize);
if (Printer.trace) Printer.trace("DirectDL CONSTRUCTOR: info: " + info);
this.mixerIndex = mixerIndex;
this.deviceID = deviceID;
this.waitTime = 10; // 10 milliseconds default wait time
this.isSource = isSource;
}
// ABSTRACT METHOD IMPLEMENTATIONS
// ABSTRACT LINE / DATALINE
void implOpen(AudioFormat format, int bufferSize) throws LineUnavailableException {
if (Printer.trace) Printer.trace(">> DirectDL: implOpen("+format+", "+bufferSize+" bytes)");
// $$fb part of fix for 4679187: Clip.open() throws unexpected Exceptions
Toolkit.isFullySpecifiedAudioFormat(format);
// check for record permission
if (!isSource) {
JSSecurityManager.checkRecordPermission();
}
int encoding = PCM;
if (format.getEncoding().equals(AudioFormat.Encoding.ULAW)) {
encoding = ULAW;
}
else if (format.getEncoding().equals(AudioFormat.Encoding.ALAW)) {
encoding = ALAW;
}
if (bufferSize <= AudioSystem.NOT_SPECIFIED) {
bufferSize = (int) Toolkit.millis2bytes(format, DEFAULT_LINE_BUFFER_TIME);
}
DirectDLI ddli = null;
if (info instanceof DirectDLI) {
ddli = (DirectDLI) info;
}
/* set up controls */
if (isSource) {
if (!format.getEncoding().equals(AudioFormat.Encoding.PCM_SIGNED)
&& !format.getEncoding().equals(AudioFormat.Encoding.PCM_UNSIGNED)) {
// no controls for non-PCM formats */
controls = new Control[0];
}
else if (format.getChannels() > 2
|| format.getSampleSizeInBits() > 16) {
// no support for more than 2 channels or more than 16 bits
controls = new Control[0];
} else {
if (format.getChannels() == 1) {
controls = new Control[2];
} else {
controls = new Control[4];
controls[2] = balanceControl;
/* to keep compatibility with apps that rely on
* MixerSourceLine's PanControl
*/
controls[3] = panControl;
}
controls[0] = gainControl;
controls[1] = muteControl;
}
}
if (Printer.debug) Printer.debug("DirectAudioDevice: got "+controls.length+" controls.");
hardwareFormat = format;
/* some magic to account for not-supported endianness or signed-ness */
softwareConversionSize = 0;
if (ddli != null && !ddli.isFormatSupportedInHardware(format)) {
AudioFormat newFormat = getSignOrEndianChangedFormat(format);
if (ddli.isFormatSupportedInHardware(newFormat)) {
// apparently, the new format can be used.
hardwareFormat = newFormat;
// So do endian/sign conversion in software
softwareConversionSize = format.getFrameSize() / format.getChannels();
if (Printer.debug) {
Printer.debug("DirectAudioDevice: softwareConversionSize "
+softwareConversionSize+":");
Printer.debug(" from "+format);
Printer.debug(" to "+newFormat);
}
}
}
// align buffer to full frames
bufferSize = ((int) bufferSize / format.getFrameSize()) * format.getFrameSize();
id = nOpen(mixerIndex, deviceID, isSource,
encoding,
hardwareFormat.getSampleRate(),
hardwareFormat.getSampleSizeInBits(),
hardwareFormat.getFrameSize(),
hardwareFormat.getChannels(),
hardwareFormat.getEncoding().equals(
AudioFormat.Encoding.PCM_SIGNED),
hardwareFormat.isBigEndian(),
bufferSize);
if (id == 0) {
// TODO: nicer error messages...
throw new LineUnavailableException(
"line with format "+format+" not supported.");
}
this.bufferSize = nGetBufferSize(id, isSource);
if (this.bufferSize < 1) {
// this is an error!
this.bufferSize = bufferSize;
}
this.format = format;
// wait time = 1/4 of buffer time
waitTime = (int) Toolkit.bytes2millis(format, this.bufferSize) / 4;
if (waitTime < 10) {
waitTime = 1;
}
else if (waitTime > 1000) {
// we have seen large buffer sizes!
// never wait for more than a second
waitTime = 1000;
}
bytePosition = 0;
stoppedWritten = false;
doIO = false;
calcVolume();
if (Printer.trace) Printer.trace("<< DirectDL: implOpen() succeeded");
}
void implStart() {
if (Printer.trace) Printer.trace(" >> DirectDL: implStart()");
// check for record permission
if (!isSource) {
JSSecurityManager.checkRecordPermission();
}
synchronized (lockNative)
{
nStart(id, isSource);
}
// check for monitoring/servicing
monitoring = requiresServicing();
if (monitoring) {
getEventDispatcher().addLineMonitor(this);
}
doIO = true;
// need to set Active and Started
// note: the current API always requires that
// Started and Active are set at the same time...
if (isSource && stoppedWritten) {
setStarted(true);
setActive(true);
}
if (Printer.trace) Printer.trace("<< DirectDL: implStart() succeeded");
}
void implStop() {
if (Printer.trace) Printer.trace(">> DirectDL: implStop()");
// check for record permission
if (!isSource) {
JSSecurityManager.checkRecordPermission();
}
if (monitoring) {
getEventDispatcher().removeLineMonitor(this);
monitoring = false;
}
synchronized (lockNative) {
nStop(id, isSource);
}
// wake up any waiting threads
synchronized(lock) {
// need to set doIO to false before notifying the
// read/write thread, that's why isStartedRunning()
// cannot be used
doIO = false;
lock.notifyAll();
}
setActive(false);
setStarted(false);
stoppedWritten = false;
if (Printer.trace) Printer.trace(" << DirectDL: implStop() succeeded");
}
void implClose() {
if (Printer.trace) Printer.trace(">> DirectDL: implClose()");
// check for record permission
if (!isSource) {
JSSecurityManager.checkRecordPermission();
}
// be sure to remove this monitor
if (monitoring) {
getEventDispatcher().removeLineMonitor(this);
monitoring = false;
}
doIO = false;
long oldID = id;
id = 0;
synchronized (lockNative) {
nClose(oldID, isSource);
}
bytePosition = 0;
softwareConversionSize = 0;
if (Printer.trace) Printer.trace("<< DirectDL: implClose() succeeded");
}
// METHOD OVERRIDES
public int available() {
if (id == 0) {
return 0;
}
int a;
synchronized (lockNative) {
a = nAvailable(id, isSource);
}
return a;
}
public void drain() {
noService = true;
// additional safeguard against draining forever
// this occurred on Solaris 8 x86, probably due to a bug
// in the audio driver
int counter = 0;
long startPos = getLongFramePosition();
boolean posChanged = false;
while (!drained) {
synchronized (lockNative) {
if ((id == 0) || (!doIO) || !nIsStillDraining(id, isSource))
break;
}
// check every now and then for a new position
if ((counter % 5) == 4) {
long thisFramePos = getLongFramePosition();
posChanged = posChanged | (thisFramePos != startPos);
if ((counter % 50) > 45) {
// when some time elapsed, check that the frame position
// really changed
if (!posChanged) {
if (Printer.err) Printer.err("Native reports isDraining, but frame position does not increase!");
break;
}
posChanged = false;
startPos = thisFramePos;
}
}
counter++;
synchronized(lock) {
try {
lock.wait(10);
} catch (InterruptedException ie) {}
}
}
if (doIO && id != 0) {
drained = true;
}
noService = false;
}
public void flush() {
if (id != 0) {
// first stop ongoing read/write method
flushing = true;
synchronized(lock) {
lock.notifyAll();
}
synchronized (lockNative) {
if (id != 0) {
// then flush native buffers
nFlush(id, isSource);
}
}
drained = true;
}
}
// replacement for getFramePosition (see AbstractDataLine)
public long getLongFramePosition() {
long pos;
synchronized (lockNative) {
pos = nGetBytePosition(id, isSource, bytePosition);
}
// hack because ALSA sometimes reports wrong framepos
if (pos < 0) {
if (Printer.debug) Printer.debug("DirectLine.getLongFramePosition: Native reported pos="
+pos+"! is changed to 0. byteposition="+bytePosition);
pos = 0;
}
return (pos / getFormat().getFrameSize());
}
/*
* write() belongs into SourceDataLine and Clip,
* so define it here and make it accessible by
* declaring the respective interfaces with DirectSDL and DirectClip
*/
public int write(byte[] b, int off, int len) {
flushing = false;
if (len == 0) {
return 0;
}
if (len < 0) {
throw new IllegalArgumentException("illegal len: "+len);
}
if (len % getFormat().getFrameSize() != 0) {
throw new IllegalArgumentException("illegal request to write "
+"non-integral number of frames ("
+len+" bytes, "
+"frameSize = "+getFormat().getFrameSize()+" bytes)");
}
if (off < 0) {
throw new ArrayIndexOutOfBoundsException(off);
}
if ((long)off + (long)len > (long)b.length) {
throw new ArrayIndexOutOfBoundsException(b.length);
}
if (!isActive() && doIO) {
// this is not exactly correct... would be nicer
// if the native sub system sent a callback when IO really starts
setActive(true);
setStarted(true);
}
int written = 0;
while (!flushing) {
int thisWritten;
synchronized (lockNative) {
thisWritten = nWrite(id, b, off, len,
softwareConversionSize,
leftGain, rightGain);
if (thisWritten < 0) {
// error in native layer
break;
}
bytePosition += thisWritten;
if (thisWritten > 0) {
drained = false;
}
}
len -= thisWritten;
written += thisWritten;
if (doIO && len > 0) {
off += thisWritten;
synchronized (lock) {
try {
lock.wait(waitTime);
} catch (InterruptedException ie) {}
}
} else {
break;
}
}
if (written > 0 && !doIO) {
stoppedWritten = true;
}
return written;
}
protected boolean requiresServicing() {
return nRequiresServicing(id, isSource);
}
// called from event dispatcher for lines that need servicing
public void checkLine() {
synchronized (lockNative) {
if (monitoring
&& doIO
&& id != 0
&& !flushing
&& !noService) {
nService(id, isSource);
}
}
}
private void calcVolume() {
if (getFormat() == null) {
return;
}
if (muteControl.getValue()) {
leftGain = 0.0f;
rightGain = 0.0f;
return;
}
float gain = gainControl.getLinearGain();
if (getFormat().getChannels() == 1) {
// trivial case: only use gain
leftGain = gain;
rightGain = gain;
} else {
// need to combine gain and balance
float bal = balanceControl.getValue();
if (bal < 0.0f) {
// left
leftGain = gain;
rightGain = gain * (bal + 1.0f);
} else {
leftGain = gain * (1.0f - bal);
rightGain = gain;
}
}
}
/////////////////// CONTROLS /////////////////////////////
protected final class Gain extends FloatControl {
private float linearGain = 1.0f;
private Gain() {
super(FloatControl.Type.MASTER_GAIN,
Toolkit.linearToDB(0.0f),
Toolkit.linearToDB(2.0f),
Math.abs(Toolkit.linearToDB(1.0f)-Toolkit.linearToDB(0.0f))/128.0f,
-1,
0.0f,
"dB", "Minimum", "", "Maximum");
}
public void setValue(float newValue) {
// adjust value within range ?? spec says IllegalArgumentException
//newValue = Math.min(newValue, getMaximum());
//newValue = Math.max(newValue, getMinimum());
float newLinearGain = Toolkit.dBToLinear(newValue);
super.setValue(Toolkit.linearToDB(newLinearGain));
// if no exception, commit to our new gain
linearGain = newLinearGain;
calcVolume();
}
float getLinearGain() {
return linearGain;
}
} // class Gain
private final class Mute extends BooleanControl {
private Mute() {
super(BooleanControl.Type.MUTE, false, "True", "False");
}
public void setValue(boolean newValue) {
super.setValue(newValue);
calcVolume();
}
} // class Mute
private final class Balance extends FloatControl {
private Balance() {
super(FloatControl.Type.BALANCE, -1.0f, 1.0f, (1.0f / 128.0f), -1, 0.0f,
"", "Left", "Center", "Right");
}
public void setValue(float newValue) {
setValueImpl(newValue);
panControl.setValueImpl(newValue);
calcVolume();
}
void setValueImpl(float newValue) {
super.setValue(newValue);
}
} // class Balance
private final class Pan extends FloatControl {
private Pan() {
super(FloatControl.Type.PAN, -1.0f, 1.0f, (1.0f / 128.0f), -1, 0.0f,
"", "Left", "Center", "Right");
}
public void setValue(float newValue) {
setValueImpl(newValue);
balanceControl.setValueImpl(newValue);
calcVolume();
}
void setValueImpl(float newValue) {
super.setValue(newValue);
}
} // class Pan
} // class DirectDL
/**
* Private inner class representing a SourceDataLine
*/
private static final class DirectSDL extends DirectDL
implements SourceDataLine {
// CONSTRUCTOR
private DirectSDL(DataLine.Info info,
AudioFormat format,
int bufferSize,
DirectAudioDevice mixer) {
super(info, mixer, format, bufferSize, mixer.getMixerIndex(), mixer.getDeviceID(), true);
if (Printer.trace) Printer.trace("DirectSDL CONSTRUCTOR: completed");
}
}
/**
* Private inner class representing a TargetDataLine
*/
private static final class DirectTDL extends DirectDL
implements TargetDataLine {
// CONSTRUCTOR
private DirectTDL(DataLine.Info info,
AudioFormat format,
int bufferSize,
DirectAudioDevice mixer) {
super(info, mixer, format, bufferSize, mixer.getMixerIndex(), mixer.getDeviceID(), false);
if (Printer.trace) Printer.trace("DirectTDL CONSTRUCTOR: completed");
}
// METHOD OVERRIDES
public int read(byte[] b, int off, int len) {
flushing = false;
if (len == 0) {
return 0;
}
if (len < 0) {
throw new IllegalArgumentException("illegal len: "+len);
}
if (len % getFormat().getFrameSize() != 0) {
throw new IllegalArgumentException("illegal request to read "
+"non-integral number of frames ("
+len+" bytes, "
+"frameSize = "+getFormat().getFrameSize()+" bytes)");
}
if (off < 0) {
throw new ArrayIndexOutOfBoundsException(off);
}
if ((long)off + (long)len > (long)b.length) {
throw new ArrayIndexOutOfBoundsException(b.length);
}
if (!isActive() && doIO) {
// this is not exactly correct... would be nicer
// if the native sub system sent a callback when IO really starts
setActive(true);
setStarted(true);
}
int read = 0;
while (doIO && !flushing) {
int thisRead;
synchronized (lockNative) {
thisRead = nRead(id, b, off, len, softwareConversionSize);
if (thisRead < 0) {
// error in native layer
break;
}
bytePosition += thisRead;
if (thisRead > 0) {
drained = false;
}
}
len -= thisRead;
read += thisRead;
if (len > 0) {
off += thisRead;
synchronized(lock) {
try {
lock.wait(waitTime);
} catch (InterruptedException ie) {}
}
} else {
break;
}
}
if (flushing) {
read = 0;
}
return read;
}
}
/**
* Private inner class representing a Clip
* This clip is realized in software only
*/
private static final class DirectClip extends DirectDL
implements Clip, Runnable, AutoClosingClip {
private Thread thread;
private byte[] audioData = null;
private int frameSize; // size of one frame in bytes
private int m_lengthInFrames;
private int loopCount;
private int clipBytePosition; // index in the audioData array at current playback
private int newFramePosition; // set in setFramePosition()
private int loopStartFrame;
private int loopEndFrame; // the last sample included in the loop
// auto closing clip support
private boolean autoclosing = false;
// CONSTRUCTOR
private DirectClip(DataLine.Info info,
AudioFormat format,
int bufferSize,
DirectAudioDevice mixer) {
super(info, mixer, format, bufferSize, mixer.getMixerIndex(), mixer.getDeviceID(), true);
if (Printer.trace) Printer.trace("DirectClip CONSTRUCTOR: completed");
}
// CLIP METHODS
public void open(AudioFormat format, byte[] data, int offset, int bufferSize)
throws LineUnavailableException {
// $$fb part of fix for 4679187: Clip.open() throws unexpected Exceptions
Toolkit.isFullySpecifiedAudioFormat(format);
byte[] newData = new byte[bufferSize];
System.arraycopy(data, offset, newData, 0, bufferSize);
open(format, newData, bufferSize / format.getFrameSize());
}
// this method does not copy the data array
private void open(AudioFormat format, byte[] data, int frameLength)
throws LineUnavailableException {
// $$fb part of fix for 4679187: Clip.open() throws unexpected Exceptions
Toolkit.isFullySpecifiedAudioFormat(format);
synchronized (mixer) {
if (Printer.trace) Printer.trace("> DirectClip.open(format, data, frameLength)");
if (Printer.debug) Printer.debug(" data="+((data==null)?"null":""+data.length+" bytes"));
if (Printer.debug) Printer.debug(" frameLength="+frameLength);
if (isOpen()) {
throw new IllegalStateException("Clip is already open with format " + getFormat() +
" and frame lengh of " + getFrameLength());
} else {
// if the line is not currently open, try to open it with this format and buffer size
this.audioData = data;
this.frameSize = format.getFrameSize();
this.m_lengthInFrames = frameLength;
// initialize loop selection with full range
bytePosition = 0;
clipBytePosition = 0;
newFramePosition = -1; // means: do not set to a new readFramePos
loopStartFrame = 0;
loopEndFrame = frameLength - 1;
loopCount = 0; // means: play the clip irrespective of loop points from beginning to end
try {
// use DirectDL's open method to open it
open(format, (int) Toolkit.millis2bytes(format, CLIP_BUFFER_TIME)); // one second buffer
} catch (LineUnavailableException lue) {
audioData = null;
throw lue;
} catch (IllegalArgumentException iae) {
audioData = null;
throw iae;
}
// if we got this far, we can instanciate the thread
int priority = Thread.NORM_PRIORITY
+ (Thread.MAX_PRIORITY - Thread.NORM_PRIORITY) / 3;
thread = JSSecurityManager.createThread(this,
"Direct Clip", // name
true, // daemon
priority, // priority
false); // doStart
// cannot start in createThread, because the thread
// uses the "thread" variable as indicator if it should
// continue to run
thread.start();
}
}
if (isAutoClosing()) {
getEventDispatcher().autoClosingClipOpened(this);
}
if (Printer.trace) Printer.trace("< DirectClip.open completed");
}
public void open(AudioInputStream stream) throws LineUnavailableException, IOException {
// $$fb part of fix for 4679187: Clip.open() throws unexpected Exceptions
Toolkit.isFullySpecifiedAudioFormat(format);
synchronized (mixer) {
if (Printer.trace) Printer.trace("> DirectClip.open(stream)");
byte[] streamData = null;
if (isOpen()) {
throw new IllegalStateException("Clip is already open with format " + getFormat() +
" and frame lengh of " + getFrameLength());
}
int lengthInFrames = (int)stream.getFrameLength();
if (Printer.debug) Printer.debug("DirectClip: open(AIS): lengthInFrames: " + lengthInFrames);
int bytesRead = 0;
if (lengthInFrames != AudioSystem.NOT_SPECIFIED) {
// read the data from the stream into an array in one fell swoop.
int arraysize = lengthInFrames * stream.getFormat().getFrameSize();
streamData = new byte[arraysize];
int bytesRemaining = arraysize;
int thisRead = 0;
while (bytesRemaining > 0 && thisRead >= 0) {
thisRead = stream.read(streamData, bytesRead, bytesRemaining);
if (thisRead > 0) {
bytesRead += thisRead;
bytesRemaining -= thisRead;
}
else if (thisRead == 0) {
Thread.yield();
}
}
} else {
// read data from the stream until we reach the end of the stream
// we use a slightly modified version of ByteArrayOutputStream
// to get direct access to the byte array (we don't want a new array
// to be allocated)
int MAX_READ_LIMIT = 16384;
DirectBAOS dbaos = new DirectBAOS();
byte tmp[] = new byte[MAX_READ_LIMIT];
int thisRead = 0;
while (thisRead >= 0) {
thisRead = stream.read(tmp, 0, tmp.length);
if (thisRead > 0) {
dbaos.write(tmp, 0, thisRead);
bytesRead += thisRead;
}
else if (thisRead == 0) {
Thread.yield();
}
} // while
streamData = dbaos.getInternalBuffer();
}
lengthInFrames = bytesRead / stream.getFormat().getFrameSize();
if (Printer.debug) Printer.debug("Read to end of stream. lengthInFrames: " + lengthInFrames);
// now try to open the device
open(stream.getFormat(), streamData, lengthInFrames);
if (Printer.trace) Printer.trace("< DirectClip.open(stream) succeeded");
} // synchronized
}
public int getFrameLength() {
return m_lengthInFrames;
}
public long getMicrosecondLength() {
return Toolkit.frames2micros(getFormat(), getFrameLength());
}
public void setFramePosition(int frames) {
if (Printer.trace) Printer.trace("> DirectClip: setFramePosition: " + frames);
if (frames < 0) {
frames = 0;
}
else if (frames >= getFrameLength()) {
frames = getFrameLength();
}
if (doIO) {
newFramePosition = frames;
} else {
clipBytePosition = frames * frameSize;
newFramePosition = -1;
}
// fix for failing test050
// $$fb although getFramePosition should return the number of rendered
// frames, it is intuitive that setFramePosition will modify that
// value.
bytePosition = frames * frameSize;
// cease currently playing buffer
flush();
// set new native position (if necessary)
// this must come after the flush!
synchronized (lockNative) {
nSetBytePosition(id, isSource, frames * frameSize);
}
if (Printer.debug) Printer.debug(" DirectClip.setFramePosition: "
+" doIO="+doIO
+" newFramePosition="+newFramePosition
+" clipBytePosition="+clipBytePosition
+" bytePosition="+bytePosition
+" getLongFramePosition()="+getLongFramePosition());
if (Printer.trace) Printer.trace("< DirectClip: setFramePosition");
}
// replacement for getFramePosition (see AbstractDataLine)
public long getLongFramePosition() {
/* $$fb
* this would be intuitive, but the definition of getFramePosition
* is the number of frames rendered since opening the device...
* That also means that setFramePosition() means something very
* different from getFramePosition() for Clip.
*/
// take into account the case that a new position was set...
//if (!doIO && newFramePosition >= 0) {
//return newFramePosition;
//}
return super.getLongFramePosition();
}
public synchronized void setMicrosecondPosition(long microseconds) {
if (Printer.trace) Printer.trace("> DirectClip: setMicrosecondPosition: " + microseconds);
long frames = Toolkit.micros2frames(getFormat(), microseconds);
setFramePosition((int) frames);
if (Printer.trace) Printer.trace("< DirectClip: setMicrosecondPosition succeeded");
}
public void setLoopPoints(int start, int end) {
if (Printer.trace) Printer.trace("> DirectClip: setLoopPoints: start: " + start + " end: " + end);
if (start < 0 || start >= getFrameLength()) {
throw new IllegalArgumentException("illegal value for start: "+start);
}
if (end >= getFrameLength()) {
throw new IllegalArgumentException("illegal value for end: "+end);
}
if (end == -1) {
end = getFrameLength() - 1;
if (end < 0) {
end = 0;
}
}
// if the end position is less than the start position, throw IllegalArgumentException
if (end < start) {
throw new IllegalArgumentException("End position " + end + " preceeds start position " + start);
}
// slight race condition with the run() method, but not a big problem
loopStartFrame = start;
loopEndFrame = end;
if (Printer.trace) Printer.trace(" loopStart: " + loopStartFrame + " loopEnd: " + loopEndFrame);
if (Printer.trace) Printer.trace("< DirectClip: setLoopPoints completed");
}
public void loop(int count) {
// note: when count reaches 0, it means that the entire clip
// will be played, i.e. it will play past the loop end point
loopCount = count;
start();
}
// ABSTRACT METHOD IMPLEMENTATIONS
// ABSTRACT LINE
void implOpen(AudioFormat format, int bufferSize) throws LineUnavailableException {
// only if audioData wasn't set in a calling open(format, byte[], frameSize)
// this call is allowed.
if (audioData == null) {
throw new IllegalArgumentException("illegal call to open() in interface Clip");
}
super.implOpen(format, bufferSize);
}
void implClose() {
if (Printer.trace) Printer.trace(">> DirectClip: implClose()");
// dispose of thread
Thread oldThread = thread;
thread = null;
doIO = false;
if (oldThread != null) {
// wake up the thread if it's in wait()
synchronized(lock) {
lock.notifyAll();
}
// wait for the thread to terminate itself,
// but max. 2 seconds. Must not be synchronized!
try {
oldThread.join(2000);
} catch (InterruptedException ie) {}
}
super.implClose();
// remove audioData reference and hand it over to gc
audioData = null;
newFramePosition = -1;
// remove this instance from the list of auto closing clips
getEventDispatcher().autoClosingClipClosed(this);
if (Printer.trace) Printer.trace("<< DirectClip: implClose() succeeded");
}
void implStart() {
if (Printer.trace) Printer.trace("> DirectClip: implStart()");
super.implStart();
if (Printer.trace) Printer.trace("< DirectClip: implStart() succeeded");
}
void implStop() {
if (Printer.trace) Printer.trace(">> DirectClip: implStop()");
super.implStop();
// reset loopCount field so that playback will be normal with
// next call to start()
loopCount = 0;
if (Printer.trace) Printer.trace("<< DirectClip: implStop() succeeded");
}
// main playback loop
public void run() {
if (Printer.trace) Printer.trace(">>> DirectClip: run() threadID="+Thread.currentThread().getId());
while (thread != null) {
// doIO is volatile, but we could check it, then get
// pre-empted while another thread changes doIO and notifies,
// before we wait (so we sleep in wait forever).
synchronized(lock) {
if (!doIO) {
/**代码未完, 请加载全部代码(NowJava.com).**/
关注时代Java
关注时代Java