/*
* @(#)VFWSourceStream.java 1.46 03/04/24
*
* Copyright (c) 1996-2002 Sun Microsystems, Inc. All rights reserved.
*/
package com.sun.media.protocol.vfw;
import java.awt.*;
import java.awt.event.ActionListener;
import java.awt.event.ItemListener;
import java.awt.event.ActionEvent;
import java.awt.event.ItemEvent;
import java.io.IOException;
import javax.media.*;
import javax.media.protocol.*;
import com.sun.media.protocol.*;
import com.sun.media.*;
import javax.media.format.*;
import javax.media.control.*;
import com.sun.media.vfw.*;
import com.sun.media.ui.VideoFormatChooser;
import com.sun.media.util.WindowUtil;
import com.sun.media.controls.FrameRateAdapter;
import java.util.Vector;
/****************************************************************
* SourceStream for the DataSource
****************************************************************/
public class VFWSourceStream
extends BasicSourceStream
implements PushBufferStream, Runnable,
ActionListener, FormatControl, Owned {
private MediaLocator locator = null;
private int capHandle = 0;
Integer cbHandleLock = new Integer(0);
private int cbHandle = 0;
private VideoFormat capFormat = null;
private float capFrameRate = 0;
private int capPreviewRate = 33; // in millis
private int capWidth = -1;
private int capHeight = -1;
private byte [] data = null;
private int maxDataSize = 1;
BufferTransferHandler transferHandler = null;
private int length = 0;
private int nativeParentWindow = 0; // Native window
private static String STRING_CF = "Custom Format...";
private static String STRING_SD = "Video Source...";
private Integer lockInit = new Integer(1);
private Integer vfwReqLock = new Integer(2);
private int vfwRequest = -1;
private static final int REQ_START = 1;
private static final int REQ_STOP = 2;
private static final int REQ_FORMATDIALOG = 3;
private static final int REQ_SOURCEDIALOG = 4;
private static final int REQ_DISCONNECT = 5;
private static final int REQ_UPDATECAPTURESETUP = 6;
private static final int REQ_MONITOR = 7;
private boolean started = false;
private boolean connected = false;
private boolean connectedOK = false;
private Frame capFrame = null;
public static int MAX_CARDS = 10;
public static boolean DEBUG = false;
private int cardNo = 0;
private static boolean [] inUse = new boolean[MAX_CARDS];
private static Integer VFWLock = new Integer(0);
Integer readLock = new Integer(1);
Integer waitForStop = new Integer(2);
boolean doneReading = false;
boolean waitingToStop = false;
long lastTimeStamp = 0;
long startTimeStamp = 0;
long [] resultTimeStamp = new long[1];
SystemTimeBase systemTimeBase = new SystemTimeBase();
private Panel controlPanel = null;
private Control [] controls = null;
private static final String DEFAULT_PORT = "default";
private boolean hasDlgVideoFormat = false;
private boolean hasDlgVideoSource = false;
private boolean hasOverlay = false;
private boolean monitorEnabled = false;
private float defaultFrameRate = 15.0f;
private float requestedFrameRate = 15.0f;
private PushThread pt = null;
private TransferDataThread tdt = null;
private VideoFormat defaultFormat = null;
private VideoFormat requestedFormat = null;
private VideoFormat fullFormat = null;
private CaptureDeviceInfo cdi = null;
CircularBuffer bufferQ = new CircularBuffer(8);
private float FRAME_RATES [] = {
1f, 2f, 5f, 7.5f, 10f, 12.5f, 15f, 20f, 24f, 25f, 30f
};
static {
for (int i = 0; i < MAX_CARDS; i++)
inUse[i] = false;
}
public VFWSourceStream(MediaLocator ml) {
super(new ContentDescriptor(ContentDescriptor.RAW),
LENGTH_UNKNOWN);
this.locator = ml;
cardNo = getCardNo(ml);
}
CaptureDeviceInfo getCaptureDeviceInfo() {
if (cdi == null) {
String url = "vfw://" + cardNo;
Vector cdiList =
CaptureDeviceManager.getDeviceList(new VideoFormat(null));
if (cdiList != null && cdiList.size() > 0) {
for (int i = 0; i < cdiList.size(); i++) {
CaptureDeviceInfo tempCDI =
(CaptureDeviceInfo) cdiList.elementAt(i);
if (tempCDI.getLocator().toString().equalsIgnoreCase(url)) {
cdi = tempCDI;
break;
}
}
}
// If we couldn't find it registered in CaptureDeviceManager
if (cdi == null) {
cdi = autoDetect(cardNo);
}
}
return cdi;
}
public static CaptureDeviceInfo autoDetect(int cardNo) {
CaptureDeviceInfo cdi = null;
try {
cdi = new VFWDeviceQuery(cardNo);
if ( cdi != null && cdi.getFormats() != null &&
cdi.getFormats().length > 0) {
// Commit it to disk. Its a new device
if (CaptureDeviceManager.addDevice(cdi)) {
CaptureDeviceManager.commit();
}
}
} catch (Throwable t) {
if (t instanceof ThreadDeath)
throw (ThreadDeath)t;
}
return cdi;
}
static int getCardNo(MediaLocator locator) {
int cardNo = 0;
String remainder = locator.getRemainder();
if (remainder != null && remainder.length() > 0) {
while (remainder.length() > 1 && remainder.charAt(0) == '/')
remainder = remainder.substring(1);
try {
Integer integer = Integer.valueOf(remainder);
if (integer != null)
cardNo = integer.intValue();
} catch (Throwable t) {
}
}
return cardNo;
}
public Object getDataType() {
return Format.byteArray;
}
public void setTransferHandler(BufferTransferHandler th) {
transferHandler = th;
}
public void connect(Format format) throws IOException {
synchronized (VFWLock) {
/*
try {
String prop = System.getProperty("vfw.popup");
if (prop != null)
disableFormatDialog = true;
} catch (Throwable t) {
if (t instanceof ThreadDeath)
throw (ThreadDeath)t;
}
*/
if (connected)
return;
if (inUse[cardNo]) {
//System.err.println("Card in use");
throw new IOException("Capture device in use");
} else
inUse[cardNo] = true;
connected = false;
if (format != null)
requestedFormat = (VideoFormat) format;
//System.err.println("Requested format is " + requestedFormat);
Thread initThread = new Thread(this, "VFW Request Thread");
initThread.start();
if (!connected) {
//synchronized (lockInit) {
try {
//System.err.println("Waiting to finish connect");
while (!connected) {
Thread.currentThread().sleep(50);
Thread.currentThread().yield();
}
} catch (InterruptedException ie) {
}
//}
}
if (!connectedOK) {
inUse[cardNo] = false;
connected = false;
throw new IOException("Could not connect to capture device");
} else
updateComponents();
}
}
private boolean doConnect() {
//System.err.println("Before creating window");
nativeParentWindow = VFWCapture.createWindow("Cap Parent");
//System.err.println("After creating window");
capHandle = VFWCapture.capCreateCaptureWindow("Test",
nativeParentWindow,
0, 0, 320, 240,
VFWCapture.getNextID());
if (capHandle == 0) {
VFWCapture.destroyWindow(nativeParentWindow);
return false;
}
cbHandle = VFWCapture.createFrameCallback(capHandle);
if (cbHandle == 0 || !VFWCapture.capDriverConnect(capHandle, cardNo)) {
//System.err.println("capDriverConnect failed");
if (cbHandle != 0)
VFWCapture.destroyFrameCallback(capHandle, cbHandle);
VFWCapture.destroyWindow(capHandle);
//capFrame.dispose();
VFWCapture.destroyWindow(nativeParentWindow);
return false;
}
CapDriverCaps cdc = new CapDriverCaps();
VFWCapture.capDriverGetCaps(capHandle, cdc);
CaptureParms cp = new CaptureParms();
VFWCapture.capCaptureGetSetup(capHandle, cp);
//System.err.println("Capture Params = " + cp);
// Allow windows events to occur
cp.fYield = true;
// Dont capture audio by default
cp.fCaptureAudio = false;
// Dont abort on mouse clicks
cp.fAbortLeftMouse = false;
cp.fAbortRightMouse = false;
// Dont prompt user to start
cp.fMakeUserHitOKToCapture = false;
if (cdc.fHasDlgVideoFormat) {
hasDlgVideoFormat = true;
}
if (requestedFormat == null) {
Dimension size = new Dimension(320, 240);
requestedFormat = new RGBFormat(size,
size.width * size.height * 3,
Format.byteArray,
requestedFrameRate,
24,
3, 2, 1,
3, size.width * 3,
RGBFormat.TRUE,
RGBFormat.NOT_SPECIFIED);
}
// Default frame rate requested is 15 fps.
if (cp.dwRequestMicroSecPerFrame == 0)
cp.dwRequestMicroSecPerFrame = 66667;
defaultFrameRate = 1000000F / cp.dwRequestMicroSecPerFrame;
if (requestedFormat.getFrameRate() > 0 &&
requestedFormat.getFrameRate() < 61)
requestedFrameRate = requestedFormat.getFrameRate();
cp.dwRequestMicroSecPerFrame = (int) (1000000F / requestedFrameRate);
//FRAME_RATES[0] = requestedFrameRate;
cp.wNumVideoRequested = 15;
VFWCapture.capCaptureSetSetup(capHandle, cp);
VFWCapture.capCaptureGetSetup(capHandle, cp);
if (cp.dwRequestMicroSecPerFrame != 0)
capFrameRate = 1000000F / cp.dwRequestMicroSecPerFrame;
else
capFrameRate = requestedFrameRate;
if (cdc.fHasDlgVideoSource)
hasDlgVideoSource = true;
if (cdc.fHasOverlay) {
VFWCapture.capOverlay(capHandle, monitorEnabled);
hasOverlay = true;
} else {
VFWCapture.capPreview(capHandle, monitorEnabled);
VFWCapture.capPreviewRate(capHandle, 33);
hasOverlay = false;
}
VFWCapture.capSetWindowPos(capHandle, 0, 0, 320, 240);
BitMapInfo bmi = new BitMapInfo();
VFWCapture.capGetVideoFormat(capHandle, bmi);
defaultFormat = bmi.createVideoFormat(Format.byteArray, capFrameRate);
bmi = new BitMapInfo(requestedFormat);
//System.err.println("Setting bmi = " + bmi);
VFWCapture.capSetVideoFormat(capHandle, bmi);
VFWCapture.capGetVideoFormat(capHandle, bmi);
//System.err.println("Result of setting = " + bmi);
capFormat = bmi.createVideoFormat(Format.byteArray);
VideoFormat frOnly = new VideoFormat(null, null,
Format.NOT_SPECIFIED,
null,
capFrameRate);
fullFormat = (VideoFormat) capFormat.intersects(frOnly);
maxDataSize = bmi.biSizeImage;
data = new byte[maxDataSize];
return true;
}
void updateCaptureSetup() {
CaptureParms cp = new CaptureParms();
VFWCapture.capCaptureGetSetup(capHandle, cp);
if (requestedFrameRate < 1)
requestedFrameRate = 1;
cp.dwRequestMicroSecPerFrame = (int) (1000000F / requestedFrameRate);
VFWCapture.capCaptureSetSetup(capHandle, cp);
VFWCapture.capCaptureGetSetup(capHandle, cp);
if (cp.dwRequestMicroSecPerFrame != 0)
capFrameRate = 1000000F / cp.dwRequestMicroSecPerFrame;
updateFormatChooser();
}
void updateFormatChooser() {
if (formatChooser != null) {
formatChooser.setCurrentFormat(capFormat);
formatChooser.setFrameRate(capFrameRate);
}
}
void requestUpdateCaptureSetup() {
synchronized (vfwReqLock) {
vfwRequest = REQ_UPDATECAPTURESETUP;
vfwReqLock.notifyAll();
}
}
synchronized void disconnect() {
if (started) {
try {
stop();
} catch (IOException ioe) {
}
}
connected = false;
synchronized (vfwReqLock) {
vfwRequest = REQ_DISCONNECT;
vfwReqLock.notifyAll();
}
while (pt != null) {
try {
wait(50);
} catch (InterruptedException ie) {
}
}
inUse[cardNo] = false;
synchronized (bufferQ) {
bufferQ.notifyAll();
}
synchronized (readLock) {
readLock.notifyAll();
}
}
private void doDisconnect() {
VFWCapture.capCaptureAbort(capHandle);
VFWCapture.stopFrameCallback(capHandle, cbHandle);
synchronized (cbHandleLock) {
//VFWCapture.destroyFrameCallback(capHandle, cbHandle);
cbHandle = 0;
}
if (hasOverlay)
VFWCapture.capOverlay(capHandle, false);
else
VFWCapture.capPreview(capHandle, false);
VFWCapture.capDriverDisconnect(capHandle);
synchronized (this) {
VFWCapture.destroyWindow(capHandle);
//capFrame.dispose();
VFWCapture.destroyWindow(nativeParentWindow);
notifyAll();
}
}
void start() throws IOException {
//System.err.println("@@@@ Incoming start 1/2");
//if (started)
// return;
//System.err.println("@@@@ Incoming start 2/2");
started = true;
updateComponents();
synchronized (this) {
if (!connected) {
started = false;
return;
}
synchronized (bufferQ) {
bufferQ.reset();
}
// Start the video call back polling thread
if (pt == null) {
pt = new PushThread(this);
pt.start();
}
synchronized (pt) {
pt.buffer = null;
pt.data = null;
pt.dataBytes = 0;
}
if (tdt == null) {
tdt = new TransferDataThread(this);
tdt.start();
}
// Send a request to the vfw thread to start capture
synchronized (vfwReqLock) {
vfwRequest = REQ_START;
vfwReqLock.notifyAll();
}
}
}
private void handleFormatChange() {
// Check if capture format changed
VideoFormat newFormat = null;
VideoFormat frOnly = null;
// If we have a new format request....
if ( requestedFormat != null ) {
//System.err.println("handleFormatChange: req = " + requestedFormat);
BitMapInfo bmi = new BitMapInfo(requestedFormat);
//System.err.println("handleFormatChange: try bmi = " + bmi);
// Try setting the format
VFWCapture.capSetVideoFormat(capHandle, bmi);
// What did it really set it to?
VFWCapture.capGetVideoFormat(capHandle, bmi);
//System.err.println("handleFormatChange: got bmi = " + bmi);
// This is the final format
capFormat = bmi.createVideoFormat(Format.byteArray);
if (requestedFormat.getFrameRate() > 0 &&
requestedFormat.getFrameRate() < 61)
requestedFrameRate = requestedFormat.getFrameRate();
requestedFormat = null;
maxDataSize = bmi.biSizeImage;
data = new byte[maxDataSize];
capWidth = bmi.biWidth;
capHeight = bmi.biHeight;
}
// Did the frame rate change in the format chooser?
if (formatChooser != null) {
float chooserFrameRate = formatChooser.getFrameRate();
if (Math.abs(chooserFrameRate - capFrameRate) > 0.45)
requestedFrameRate = chooserFrameRate;
}
if (requestedFrameRate != Format.NOT_SPECIFIED) {
updateCaptureSetup();
requestedFrameRate = Format.NOT_SPECIFIED;
}
frOnly = new VideoFormat(null,
null,
Format.NOT_SPECIFIED,
null,
capFrameRate);
newFormat = (VideoFormat) capFormat.intersects(frOnly);
if ( fullFormat == null ||
!newFormat.equals(fullFormat)) {
fullFormat = newFormat;
}
updateFormatChooser();
}
private void doStartCapture() {
handleFormatChange();
// Start the capture
CapStatus cs = new CapStatus();
VFWCapture.capGetStatus(capHandle, cs);
if (cs.fCapturingNow)
return;
VFWCapture.startFrameCallback(capHandle, cbHandle);
VFWCapture.capCaptureSequenceNoFile(capHandle);
startTimeStamp = systemTimeBase.getNanoseconds();
}
void stop() throws IOException {
started = false;
synchronized (vfwReqLock) {
vfwRequest = REQ_STOP;
waitingToStop = true;
vfwReqLock.notifyAll();
}
synchronized (waitForStop) {
while (waitingToStop) {
try {
waitForStop.wait();
} catch (InterruptedException ie) {
}
}
}
updateComponents();
}
public void finalize() {
if (connected)
disconnect();
}
boolean getStarted() {
return started;
}
boolean getConnected() {
return connected;
}
int getCapHandle() {
return capHandle;
}
int getCBHandle() {
return cbHandle;
}
byte [] getData() {
return data;
}
void pushData(int length) {
this.length = length;
if (transferHandler != null)
transferHandler.transferData(this);
}
Object checkDataAllocation(Buffer buffer) {
Object data;
if (buffer instanceof ExtBuffer &&
((ExtBuffer)buffer).isNativePreferred()) {
data = ((ExtBuffer)buffer).getNativeData();
if (data == null || ((NBA)data).getSize() < maxDataSize)
data = new NBA(byte[].class, maxDataSize);
((ExtBuffer)buffer).setNativeData((NBA) data);
} else {
data = buffer.getData();
if (data == null || !(data instanceof byte[]) ||
((byte[])data).length < maxDataSize) {
data = new byte[maxDataSize];
buffer.setData(data);
}
}
return data;
}
public void read(Buffer buffer) {
synchronized (readLock) {
synchronized (bufferQ) {
if (bufferQ.canRead()) {
// Get the available captured buffer
Buffer captureBuffer = bufferQ.read();
buffer.copy(captureBuffer, true); // swap data objects
buffer.setOffset(0);
buffer.setFormat(fullFormat);
buffer.setFlags(Buffer.FLAG_KEY_FRAME | Buffer.FLAG_SYSTEM_TIME |
Buffer.FLAG_LIVE_DATA);
/*
byte [] outgoingData = (byte[]) captureBuffer.getData();
captureBuffer.setData(checkDataAllocation(buffer.getData()));
// Copy attributes of captured buffer to outgoing
buffer.setData(outgoingData);
buffer.setOffset(0);
buffer.setLength(captureBuffer.getLength());
buffer.setTimeStamp(captureBuffer.getTimeStamp());
buffer.setFormat(fullFormat);
buffer.setFlags(Buffer.FLAG_KEY_FRAME | Buffer.FLAG_SYSTEM_TIME);
*/
// Release buffer to buffer queue
bufferQ.readReport();
} else
buffer.setDiscard(true);
}
doneReading = true;
readLock.notifyAll();
}
}
public Object [] getControls() {
if (controls == null) {
controls = new Control[2];
controls[0] = (FormatControl)this;
controls[1] = new MC();
}
return controls;
}
/****************************************************************
* FormatControl
****************************************************************/
public Format getFormat() {
if (fullFormat == null)
fullFormat = (VideoFormat) getSupportedFormats()[0];
return fullFormat;
}
public Format [] getSupportedFormats() {
if (cdi == null)
cdi = getCaptureDeviceInfo();
if (cdi == null)
return new Format[0];
return cdi.getFormats();
}
public Format setFormat(Format in) {
if (!(in instanceof VideoFormat))
return null;
Format matched = BasicPlugIn.matches(in, getSupportedFormats());
if (matched != null)
requestedFormat = (VideoFormat) in;
if (connected && !started) {
handleFormatChange();
return fullFormat;
} else {
return matched;
}
}
public void setEnabled(boolean value) {
// ignore
}
public boolean isEnabled() {
return true;
}
Choice formatChoice = null;
Choice frameRateChoice = null;
Panel controlComponent = null;
Button formatDialog = null;
Button sourceDialog = null;
VideoFormatChooser formatChooser = null;
private void updateComponents() {
if (formatChoice != null)
formatChoice.setEnabled( !started );
if (formatChooser != null)
formatChooser.setEnabled( connected && !started );
if (formatDialog != null)
formatDialog.setEnabled( connected && !started );
if (sourceDialog != null)
sourceDialog.setEnabled( connected && !started );
if (frameRateChoice != null)
frameRateChoice.setEnabled( !started );
if (cbMonitorEnable != null)
cbMonitorEnable.setEnabled( !started );
}
public Component getControlComponent() {
if (controlComponent == null) {
controlComponent = new Panel( new BorderLayout() );
controlComponent.setName("Capture Control");
Format [] formats = getSupportedFormats();
formatChooser = new VideoFormatChooser(formats, (VideoFormat) getFormat(),
FRAME_RATES);
controlComponent.add("North", formatChooser);
formatDialog = new Button(STRING_CF);
sourceDialog = new Button(STRING_SD);
sourceDialog.addActionListener(this);
Panel southPanel = new Panel();
southPanel.add(formatDialog);
southPanel.add(sourceDialog);
controlComponent.add("South", southPanel);
updateComponents();
updateFormatChooser();
formatDialog.addActionListener(this);
}
return controlComponent;
}
public Object getOwner() {
return this;
}
/****************************************************************
* ActionListener
****************************************************************/
public synchronized void actionPerformed(ActionEvent ae) {
String source = ae.getActionCommand();
if (source.equals(STRING_CF)) {
synchronized (vfwReqLock) {
vfwRequest = REQ_FORMATDIALOG;
vfwReqLock.notifyAll();
}
} else if (source.equals(STRING_SD)) {
synchronized (vfwReqLock) {
vfwRequest = REQ_SOURCEDIALOG;
vfwReqLock.notifyAll();
}
}
}
/****************************************************************
* this.Thread to do VFW requests.
****************************************************************/
public void run() {
boolean wmQuit = false;
int peekResult = 1;
if (doConnect()) {
synchronized (lockInit) {
connected = true;
connectedOK = true;
//System.err.println("Notifying doneConnect");
lockInit.notifyAll();
}
} else {
synchronized (lockInit) {
connected = true;
connectedOK = false;
lockInit.notifyAll();
return;
}
}
while (connected) {
while (vfwRequest < 0) {
try {
Thread.currentThread().yield();
Thread.currentThread().sleep(50);
} catch (InterruptedException ie) {
}
//System.err.println("Peeking..");
peekResult = VFWCapture.peekWindowLoop(nativeParentWindow);
if (peekResult == 0)
wmQuit = true;
}
int cpVFWRequest = vfwRequest;
vfwRequest = -1;
switch (cpVFWRequest) {
case REQ_STOP:
if (DEBUG) System.err.println("capture - Stopping");
VFWCapture.stopFrameCallback(capHandle, cbHandle);
VFWCapture.capCaptureStop(capHandle);
// Wait for atmost 5 seconds for capture to stop
int i = 0;
CapStatus cs = new CapStatus();
while (i < 100) {
VFWCapture.capGetStatus(capHandle, cs);
if (!cs.fCapturingNow) {
if (DEBUG) System.err.println("capture - Stopped");
break;
}
try {
Thread.currentThread().sleep(50);
} catch (InterruptedException ie) {
}
i++;
}
waitingToStop = false;
synchronized (waitForStop) {
waitForStop.notifyAll();
}
break;
case REQ_START:
if (DEBUG) System.err.println("capture - Starting");
doStartCapture();
if (DEBUG) System.err.println("capture - Started");
break;
case REQ_DISCONNECT:
if (DEBUG) System.err.println("capture - Disconnecting");
break;
case REQ_FORMATDIALOG:
// Minimize monitor if its not enabled
if (!monitorEnabled)
VFWCapture.showWindow(nativeParentWindow, 1, -1, -1);
// Invoke the dialog
VFWCapture.capDlgVideoFormat(capHandle);
// Monitor back to previous state
setMonitorEnabled(monitorEnabled);
BitMapInfo bmi = new BitMapInfo();
VFWCapture.capGetVideoFormat(capHandle, bmi);
Format newFormat =
bmi.createVideoFormat(Format.byteArray, requestedFrameRate);
if (!newFormat.equals(capFormat)) {
requestedFormat = (VideoFormat) newFormat;
maxDataSize = requestedFormat.getMaxDataLength();
data = new byte[maxDataSize];
}
updateFormatChooser();
break;
case REQ_SOURCEDIALOG:
// Minimize monitor if its not enabled
if (!monitorEnabled)
VFWCapture.showWindow(nativeParentWindow, 1, -1, -1);
// Invoke the dialog
VFWCapture.capDlgVideoSource(capHandle);
// Monitor back to previous state
setMonitorEnabled(monitorEnabled);
break;
case REQ_UPDATECAPTURESETUP:
updateCaptureSetup();
break;
case REQ_MONITOR:
if (hasOverlay) {
VFWCapture.capOverlay(capHandle, monitorEnabled);
} else {
VFWCapture.capPreview(capHandle, monitorEnabled);
VFWCapture.capPreviewRate(capHandle, capPreviewRate);
}
}
}
doDisconnect();
if (DEBUG) System.err.println("capture - Disconnected");
while (!wmQuit) {
try {
Thread.currentThread().yield();
Thread.currentThread().sleep(50);
} catch (InterruptedException ie) {
}
//System.err.println("Peeking...");
peekResult = VFWCapture.peekWindowLoop(nativeParentWindow);
if (peekResult == 0)
wmQuit = true;
}
pt = null;
}
private Checkbox cbMonitorEnable = null;
private Panel monitorComponent = null;
private TextField textPreviewRate = null;
Component getMonitorControlComponent() {
if (monitorComponent == null) {
monitorComponent = new Panel();
monitorComponent.setLayout( new BorderLayout() );
cbMonitorEnable = new Checkbox("Video Monitor");
cbMonitorEnable.addItemListener(new ItemListener() {
public void itemStateChanged(ItemEvent ie) {
setMonitorEnabled(cbMonitorEnable.getState());
}
} );
Panel panelPreviewRate = new Panel( new BorderLayout() );
panelPreviewRate.add("East", new Label("frames/sec"));
textPreviewRate = new TextField("30");
textPreviewRate.addActionListener( new ActionListener() {
public void actionPerformed(ActionEvent ae) {
try {
float previewRate = Float.valueOf(textPreviewRate.getText()).floatValue();
if (previewRate < 0.1f)
previewRate = 0.1f;
else if (previewRate > 30f)
previewRate = 30f;
setMonitorPreviewRate(previewRate);
} catch (Exception e) {
}
}
} );
panelPreviewRate.add("Center", textPreviewRate);
monitorComponent.add("West", cbMonitorEnable);
monitorComponent.add("Center", panelPreviewRate);
}
return monitorComponent;
}
boolean setMonitorEnabled(boolean value) {
if (value) {
if (nativeParentWindow != 0)
VFWCapture.showWindow(nativeParentWindow, 2,
capWidth, capHeight);
monitorEnabled = true;
} else {
if (nativeParentWindow != 0)
VFWCapture.showWindow(nativeParentWindow, 0, -1, -1);
monitorEnabled = false;
}
synchronized (vfwReqLock) {
vfwRequest = REQ_MONITOR;
vfwReqLock.notifyAll();
}
return value;
}
float setMonitorPreviewRate(float rate) {
if (rate > 30)
rate = 30f;
else if (rate < 0.1)
rate = 0.1f;
int millis = (int) (1000 / rate);
capPreviewRate = millis;
synchronized (vfwReqLock) {
vfwRequest = REQ_MONITOR;
vfwReqLock.notifyAll();
}
return rate;
}
/****************************************************************
* INNER CLASSES
****************************************************************/
class MC implements MonitorControl, Owned {
public MC() {
}
public Component getControlComponent() {
return getMonitorControlComponent();
}
public float setPreviewFrameRate(float value) {
return setMonitorPreviewRate(value);
}
public boolean setEnabled(boolean value) {
return setMonitorEnabled(value);
}
public Object getOwner() {
return VFWSourceStream.this;
}
}
class PushThread extends Thread {
VFWSourceStream stream;
public PushThread(VFWSourceStream stream) {
super("VFW VideoPollThread");
this.stream = stream;
}
/*
public void run2() {
int handle = getCapHandle();
int cbHandle = getCBHandle();
int time = 0;
byte [] data = null; //getData();
//System.err.println("In PushThread.run()");
while (getConnected()) {
try {
sleep(10);
yield();
time += 10;
} catch (Exception e) {
}
if (getStarted()) {
data = checkDataAllocation(data);
synchronized (VFWSourceStream.this.cbHandleLock) {
if ((cbHandle = getCBHandle()) != 0) {
int result = VFWCapture.getAvailableData(
handle,
cbHandle,
data,
data.length,
resultTimeStamp);
if (result > 0) {
lastTimeStamp = startTimeStamp +
(resultTimeStamp[0] * 1000000);
synchronized (bufferQ) {
if (!bufferQ.canWrite()) {
// Discard an old one
bufferQ.read();
bufferQ.readReport();
}
Buffer incoming = bufferQ.getEmptyBuffer();
byte [] temp = data;
data = checkDataAllocation(incoming.getData());
incoming.setData(temp);
incoming.setOffset(0);
incoming.setTimeStamp(lastTimeStamp);
incoming.setLength(result);
bufferQ.writeReport();
bufferQ.notifyAll();
}
}
}
}
}
}
}
*/
public Object data = null;
public long dataBytes = 0;
public Buffer buffer = null;
public void run() {
int handle = getCapHandle();
int cbHandle = getCBHandle();
int time = 0;
//System.err.println("In PushThread.run()");
while (getConnected()) {
try {
sleep(10);
yield();
time += 10;
} catch (Exception e) {
}
synchronized (this) {
if (getStarted()) {
if (buffer == null) {
synchronized (bufferQ) {
if (!bufferQ.canWrite()) {
// Discard an old one
bufferQ.read();
bufferQ.readReport();
}
buffer = bufferQ.getEmptyBuffer();
}
data = checkDataAllocation(buffer);
if (data instanceof NBA)
dataBytes = ((NBA)data).getNativeData();
else
dataBytes = 0;
}
synchronized (VFWSourceStream.this.cbHandleLock) {
if ((cbHandle = getCBHandle()) != 0) {
int result = VFWCapture.getAvailableData(
handle,
cbHandle,
data,
dataBytes,
maxDataSize,
resultTimeStamp);
if (result > 0) {
lastTimeStamp = startTimeStamp +
(resultTimeStamp[0] * 1000000);
synchronized (bufferQ) {
buffer.setOffset(0);
buffer.setTimeStamp(lastTimeStamp);
buffer.setLength(result);
bufferQ.writeReport();
bufferQ.notifyAll();
buffer = null;
}
}
}
}
}
}
}
}
}
class TransferDataThread extends Thread {
VFWSourceStream stream;
public TransferDataThread(VFWSourceStream stream) {
super("VFW TransferDataThread");
this.stream = stream;
}
public void run() {
while (getConnected()) {
synchronized (bufferQ) {
while (!bufferQ.canRead() && getConnected()) {
try {
bufferQ.wait(250);
} catch (InterruptedException ie) {
}
}
}
synchronized (stream.readLock) {
stream.doneReading = false;
}
if (bufferQ.canRead() && getConnected() && getStarted()) {
pushData(1);
}
synchronized (stream.readLock) {
if (!doneReading) {
try {
stream.readLock.wait(1000);
} catch (InterruptedException ie2) {
}
}
}
}
}
}
}
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