/*
* @(#)Packetizer.java 1.14 02/08/21 SMI
*
* Copyright 1999 by Sun Microsystems, Inc.,
* 901 San Antonio Road, Palo Alto, California, 94303, U.S.A.
* All rights reserved.
*
* This software is the confidential and proprietary information
* of Sun Microsystems, Inc. ("Confidential Information"). You
* shall not disclose such Confidential Information and shall use
* it only in accordance with the terms of the license agreement
* you entered into with Sun.
*/
package com.sun.media.codec.video.mpeg;
import javax.media.*;
import javax.media.Format;
import javax.media.format.VideoFormat;
import java.awt.Dimension;
import java.util.Vector;
import com.sun.media.*;
public class Packetizer extends BasicCodec {
public static float RATE_TABLE[] = {
0.0f, 23.976f, 24.f, 25.f, 29.97f,
30.f, 50.f, 59.94f, 60.f
};
private static char[] hexChar = {
'0', '1', '2', '3', '4', '5', '6', '7',
'8', '9', 'a', 'b', 'c', 'd', 'e', 'f'
};
// following values returned by do<segment> routines
protected static int SEGMENT_DONE = 1;
protected static int SEGMENT_REPEAT = 2;
protected static int SEGMENT_DONE_BUFFER_FULL = 3;
// maximum packet length
protected static int PACKET_MAX = 1456;
private static boolean debug = false;
private VideoFormat inputFormat = null;
private VideoFormat outputFormat = null;
private boolean inputEOM = false;
private boolean expectingNewInput = true;
private boolean expectingNewOutput = true;
private boolean resetTime = true;
private boolean resetInProgress = true;
// all output buffers -- used for a slice that spans packets
// type: Buffer
private Vector outputQueue = new Vector();
// all input buffers -- used for a segment that spans buffers
// should never exceed 2 buffers
private Vector inputQueue = new Vector();
// known MPEG segments
// type: MPEGSegments
private Vector segmentQueue = new Vector();
// holds last sequence header encountered
private byte[] sequenceHeader = null;
private int frameWidth = 0;
private int frameHeight = 0;
private double frameRate = 0.0;
// nanoseconds per picture (frame) based on frameRate
private long picNanos = 0;
// time in nanoseconds from last GOP
private long gopTime = 0;
// time in nanoseconds from last position time
private long startTime = 1;
// time in nanoseconds from last picture header
// == gopTime + (picture count * picNanos)
private long frameTime = 0;
private long frameCount = 0;
// sequence number for next packet
private int sequenceNumber = 0;
// RTP MPEG header without N, S, B, E set
private byte[] mpegHeader = { 0, 0, 0, 0 };
// Initialize default formats.
public Packetizer() {
inputFormats = new Format[] { new VideoFormat(VideoFormat.MPEG) };
outputFormats = new Format[] { new VideoFormat(VideoFormat.MPEG_RTP) };
}
protected Format getInputFormat() {
return inputFormat;
}
protected Format getOutputFormat() {
return outputFormat;
}
// Return supported output formats
public Format [] getSupportedOutputFormats(Format in) {
if (in == null)
return outputFormats;
// Make sure the input is MPEG video format
if (matches(in, inputFormats) == null)
return new Format[0];
Format out [] = new Format[1];
out[0] = makeMPEGFormat(in);
return out;
}
public Format setInputFormat(Format input) {
inputFormat = (VideoFormat) input;
return input;
}
public Format setOutputFormat(Format output) {
if (!(output instanceof VideoFormat)) return null;
outputFormat = makeMPEGFormat(output);
return output;
}
private final VideoFormat makeMPEGFormat(Format in) {
VideoFormat vf = (VideoFormat)in;
return new VideoFormat(VideoFormat.MPEG_RTP,
vf.getSize(),
VideoFormat.NOT_SPECIFIED,
Format.byteArray,
vf.getFrameRate());
}
public void open() throws ResourceUnavailableException {
if (inputFormat == null || outputFormat == null)
throw new ResourceUnavailableException(
"Incorrect formats set on MPEG converter");
startTime = 1; // to get past RTPSinkStream
frameRate = 0.0;
picNanos = 0;
sequenceNumber = 0;
resetTime = true;
}
public synchronized void close() {
reset();
}
public void reset() {
// Anything to do?
super.reset();
outputQueue.removeAllElements();
inputQueue.removeAllElements();
segmentQueue.removeAllElements();
inputEOM = false;
expectingNewInput = true;
expectingNewOutput = true;
resetInProgress = true;
resetTime = true;
sequenceHeader = null;
frameWidth = 0;
frameHeight = 0;
mpegHeader[0] = 0;
mpegHeader[1] = 0;
mpegHeader[2] = 0;
mpegHeader[3] = 0;
gopTime = 1; // to get past RTPSinkStream
frameTime = 0;
frameCount = 0;
if (debug) {
System.err.println("Packetizer(V): reset completed");
}
}
public synchronized int process(Buffer inBuffer, Buffer outBuffer) {
if (outputQueue.size() > 0) {
Buffer qbuf = (Buffer) outputQueue.firstElement();
outputQueue.removeElementAt(0);
outBuffer.setData((byte[]) qbuf.getData());
outBuffer.setOffset(qbuf.getOffset());
outBuffer.setLength(qbuf.getLength());
outBuffer.setFlags(qbuf.getFlags());
outBuffer.setTimeStamp(qbuf.getTimeStamp());
outBuffer.setSequenceNumber(sequenceNumber++);
outBuffer.setFormat(outputFormat);
expectingNewOutput = true;
return INPUT_BUFFER_NOT_CONSUMED;
}
if (isEOM(inBuffer)) {
inputEOM = true;
if (segmentQueue.isEmpty()) {
propagateEOM(outBuffer);
outBuffer.setSequenceNumber(sequenceNumber++);
return BUFFER_PROCESSED_OK;
}
}
if (inBuffer.isDiscard()) {
updateOutput(outBuffer, outputFormat, 0, 0);
outBuffer.setDiscard(true);
return OUTPUT_BUFFER_NOT_FILLED;
}
int retVal = BUFFER_PROCESSED_FAILED;
try {
retVal = doProcess(inBuffer, outBuffer);
} catch (Exception ex) {
ex.printStackTrace();
return BUFFER_PROCESSED_FAILED;
}
// get the outputFormat from the buffer only if this is the first time.
if (outputFormat == null) {
outputFormat = makeMPEGFormat(inBuffer.getFormat());
}
if (retVal != OUTPUT_BUFFER_NOT_FILLED) {
outBuffer.setSequenceNumber(sequenceNumber++);
}
return retVal;
}
public String getName() {
return "MPEG Video Packetizer";
}
public void finalize() {
close();
}
private int doProcess(Buffer inBuffer, Buffer outBuffer) {
if (expectingNewInput) {
if (!inputEOM) {
if (inBuffer.getData() == null) {
return OUTPUT_BUFFER_NOT_FILLED;
}
if (resetTime) {
// get the new position time from a setStartTime
startTime = inBuffer.getTimeStamp();
if (debug) {
System.err.println("Packetizer(V): new synctime set: "
+ startTime);
}
if (startTime == 0)
startTime = 1; // to get past RTPSinkStream
resetTime = false;
}
inputQueue.addElement(copyInto(inBuffer));
}
expectingNewInput = false;
}
if (expectingNewOutput) {
byte[] outData = (byte[]) outBuffer.getData();
if (outData == null || outData.length < PACKET_MAX) {
outData = new byte[PACKET_MAX];
outBuffer.setData(outData);
}
System.arraycopy(mpegHeader, 0, outData, 0, 4);
outBuffer.setOffset(0);
outBuffer.setLength(4);
outBuffer.setFlags(0);
outBuffer.setHeader(null);
outBuffer.setFormat(outputFormat);
expectingNewOutput = false;
}
if (segmentQueue.isEmpty()) {
findFirstStartCode();
if (segmentQueue.isEmpty()) {
expectingNewInput = true;
return OUTPUT_BUFFER_NOT_FILLED;
}
}
MPEGSegment mseg = (MPEGSegment) segmentQueue.firstElement();
while (mseg != null) {
if (mseg.getLength() < 0) {
// need a new input buffer to calculate length for this segment
expectingNewInput = true;
return OUTPUT_BUFFER_NOT_FILLED;
}
int startCode = mseg.startCode;
int res = 0;
if (startCode == 0xb3) { // sequence header
res = doSequenceHeader(mseg, outBuffer);
} else if (startCode == 0xb7) { // sequence end
res = doSequenceEnd(mseg, outBuffer);
} else if (startCode == 0xb8) { // GOP
res = doGOP(mseg, outBuffer);
} else if (startCode == 0) { // picture header
res = doPicture(mseg, outBuffer);
} else if (startCode >= 1 && startCode <= 0xaf) { // slice
res = doSlice(mseg, outBuffer);
} else {
// unknown start code, simply skip it
res = SEGMENT_DONE;
}
if (res == SEGMENT_DONE) {
segmentQueue.removeElementAt(0);
if (segmentQueue.isEmpty()) {
expectingNewInput = true;
if (outBuffer.getLength() > 4) {
return BUFFER_PROCESSED_OK;
} else {
return OUTPUT_BUFFER_NOT_FILLED;
}
}
mseg = (MPEGSegment) segmentQueue.firstElement();
continue;
}
if (res == SEGMENT_DONE_BUFFER_FULL) {
segmentQueue.removeElementAt(0);
// output buffer has data to be sent
outBuffer.setFlags(outBuffer.getFlags() | Buffer.FLAG_NO_DROP);
if (expectingNewInput) {
return BUFFER_PROCESSED_OK;
}
return INPUT_BUFFER_NOT_CONSUMED;
}
if (res == SEGMENT_REPEAT) {
// output buffer has data to be sent
outBuffer.setFlags(outBuffer.getFlags() | Buffer.FLAG_NO_DROP);
if (expectingNewInput) {
return BUFFER_PROCESSED_OK;
}
return INPUT_BUFFER_NOT_CONSUMED;
}
}
return BUFFER_PROCESSED_FAILED;
}
private Buffer copyInto(Buffer src) {
Buffer dest = new Buffer();
dest.copy(src);
dest.setFlags(dest.getFlags() | Buffer.FLAG_NO_DROP);
src.setData(null);
src.setHeader(null);
src.setLength(0);
src.setOffset(0);
return dest;
}
protected String toHex (byte[] inData, int inOffset) {
String hex = new String();
for (int i = 0; i < 4; i++) {
hex += hexChar[(inData[inOffset + i] >> 4) & 0x0f];
hex += hexChar[inData[inOffset + i] & 0x0f];
}
return hex;
}
private int doSequenceHeader(MPEGSegment sh, Buffer outBuffer) {
sequenceHeader = new byte[sh.getLength()];
sh.copyData(sequenceHeader, 0);
frameWidth = (sequenceHeader[4] & 0xff) << 4
| (sequenceHeader[5] & 0xf0) >> 4;
frameHeight = (sequenceHeader[5] & 0x0f) << 8
| (sequenceHeader[6] & 0xff);
int frix = (sequenceHeader[7] & 0x0f);
if (frix > 0 && frix <= 8)
frameRate = RATE_TABLE[frix];
picNanos = (long)((1000 * 1000000) / frameRate);
// int bitrate = (sequenceHeader[8] & 0xff) << 10
// | (sequenceHeader[9] & 0xff) << 2
// | (sequenceHeader[6] & 0xc0) >> 6;
return SEGMENT_DONE;
}
private int copySequenceHeader(Buffer outBuffer) {
if (sequenceHeader == null)
return 0;
System.arraycopy(sequenceHeader, 0,
outBuffer.getData(),
outBuffer.getLength(),
sequenceHeader.length);
outBuffer.setLength(outBuffer.getLength() + sequenceHeader.length);
return sequenceHeader.length;
}
private int doSequenceEnd(MPEGSegment se, Buffer outBuffer) {
// se.copyData((byte[]) outBuffer.getData(), outBuffer.getLength());
// outBuffer.setLength(outBuffer.getLength() + se.getLength());
return SEGMENT_DONE;
}
private int doGOP(MPEGSegment gop, Buffer outBuffer) {
// byte[] gb = new byte[4];
// gop.copyData(4, 4, gb, 0);
// long gtm = ((gb[0] & 0x7c) >> 2) * 60 * 60 * 1000 * 1000000;
// gtm += ((gb[0] & 0x03) << 4 | (gb[1] & 0xf0) >> 4) * 60 * 1000
// * 1000000;
// gtm += ((gb[1] & 0x07) << 3 | (gb[2] & 0xe0) >> 5) * 1000
// * 1000000;
// long gpic = (gb[2] & 0x1f) << 1 | (gb[3] & 0x80) >> 7;
// if (gpic != 0 || gtm != 0) {
// gopTime = gtm + (gpic * picNanos);
// } else if (frameCount == 0) {
// gopTime = 1; // to get past RTPSinkStream
// }
if (frameCount == 0) {
gopTime = 1 + startTime; // to get past RTPSinkStream
} else {
gopTime = frameCount * picNanos + startTime;
}
// put a sequence header before each GOP to allow RTP clients
// to connect beginning with any GOP
copySequenceHeader(outBuffer);
gop.copyData((byte[]) outBuffer.getData(), outBuffer.getLength());
outBuffer.setLength(outBuffer.getLength() + gop.getLength());
return SEGMENT_DONE;
}
private int doPicture(MPEGSegment ph, Buffer outBuffer) {
byte[] pic = new byte[ph.getLength()];
ph.copyData(pic, 0);
int cnt = (pic[4] & 0xff) << 2 | (pic[5] & 0xc0) >> 6;
int type = (pic[5] & 0x38) >> 3;
mpegHeader[0] = (byte) ((cnt >> 8) & 0x02);
mpegHeader[1] = (byte) cnt;
mpegHeader[2] = (byte) type; // ignore N, S, B, E for now
if (type == 1) {
mpegHeader[3] = 0;
} else {
int next = (pic[7] & 0x07) << 1 | (pic[8] & 0x80) >> 7;
if (type > 2)
next |= (pic[8] & 0x78) << 1;
mpegHeader[3] = (byte) next;
}
resetInProgress = false;
byte[] outData = (byte[]) outBuffer.getData();
System.arraycopy(mpegHeader, 0, outData, 0, 4);
// by the time a picture is encountered,
// sequence header & GOP should already be copied into buffer
if (outBuffer.getLength() > 8
&& outData[4] == 0
&& outData[5] == 0
&& outData[6] == 1
&& (outData[7] & 0xff) == 0xb3) {
outData[2] |= 0x20; // set S (section header present)
}
ph.copyData((byte[]) outBuffer.getData(), outBuffer.getLength());
outBuffer.setLength(outBuffer.getLength() + ph.getLength());
outBuffer.setFlags(outBuffer.getFlags() | Buffer.FLAG_KEY_FRAME);
frameCount++;
frameTime = gopTime + (cnt * picNanos);
outBuffer.setTimeStamp(frameTime);
outBuffer.setFormat(outputFormat);
return SEGMENT_DONE;
}
private int doSlice(MPEGSegment slice, Buffer outBuffer) {
byte[] outData = (byte[]) outBuffer.getData();
if (slice.getLength() < PACKET_MAX - outBuffer.getLength()) {
slice.copyData(outData, outBuffer.getLength());
outBuffer.setLength(outBuffer.getLength() + slice.getLength());
outBuffer.setTimeStamp(frameTime);
outBuffer.setFormat(outputFormat);
outData[2] |= 0x18; // set B, E (begin, end slice)
if (segmentQueue.size() > 1) {
MPEGSegment mse = (MPEGSegment) segmentQueue.elementAt(1);
if (mse.startCode < 1 || mse.startCode > 0xaf) {
outBuffer.setFlags(outBuffer.getFlags()
| Buffer.FLAG_RTP_MARKER);
expectingNewOutput = true;
return SEGMENT_DONE_BUFFER_FULL;
}
} else if (inputEOM) {
outBuffer.setFlags(outBuffer.getFlags()
| Buffer.FLAG_RTP_MARKER);
expectingNewOutput = true;
return SEGMENT_DONE_BUFFER_FULL;
}
return SEGMENT_DONE;
}
if ((outData[2] & 0x18) != 0) {
// there are slices in the buffer but this one won't fit
// send the buffer as is then come back to this slice
expectingNewOutput = true;
return SEGMENT_REPEAT;
}
int len = PACKET_MAX - outBuffer.getLength();
slice.copyData(0, len, outData, outBuffer.getLength());
outBuffer.setLength(outBuffer.getLength() + len);
outBuffer.setTimeStamp(frameTime);
outBuffer.setFormat(outputFormat);
outData[2] |= 0x10; // set B (begin slice)
int off = len;
len = slice.getLength() - len;
Buffer b = null;
// Now queue up additional output buffers to complete the slice
while (len > 0) {
b = new Buffer();
outData = new byte[PACKET_MAX];
b.setData(outData);
b.setTimeStamp(frameTime);
b.setHeader(null);
b.setFormat(outputFormat);
b.setFlags(outBuffer.getFlags());
b.setOffset(0);
System.arraycopy(mpegHeader, 0, outData, 0, 4);
int l = len;
if (len > PACKET_MAX - 4)
l = PACKET_MAX - 4;
slice.copyData(off, l, (byte[]) b.getData(), 4);
b.setLength(l + 4);
off += l;
len -= l;
if (len <= 0)
outData[2] |= 0x08; // set E (end slice)
outputQueue.addElement(b);
}
if (segmentQueue.size() > 1) {
MPEGSegment mse = (MPEGSegment) segmentQueue.elementAt(1);
if (mse.startCode < 1 || mse.startCode > 0xaf) {
b.setFlags(b.getFlags() | Buffer.FLAG_RTP_MARKER);
expectingNewOutput = true;
return SEGMENT_DONE_BUFFER_FULL;
}
} else if (inputEOM) {
b.setFlags(b.getFlags() | Buffer.FLAG_RTP_MARKER);
expectingNewOutput = true;
return SEGMENT_DONE_BUFFER_FULL;
}
expectingNewOutput = true;
return SEGMENT_DONE_BUFFER_FULL;
}
private void findFirstStartCode() {
if (inputQueue.isEmpty())
return;
Buffer inBuffer = (Buffer) inputQueue.firstElement();
// now the buffer is in the pipe, drop it from inputQueue
inputQueue.removeElementAt(0);
byte[] inData = (byte[]) inBuffer.getData();
int off = inBuffer.getOffset();
int len = inBuffer.getLength();
while (len > 4) {
if (inData[off] == 0 && inData[off+1] == 0 && inData[off+2] == 1) {
// treat extension and user_data as part of current header
if ((inData[off+3] & 0xff) != 0xb5
&& (inData[off+3] & 0xff) != 0xb2) {
if (resetInProgress) {
// after reset, need a sequence_header_code or GOP
if ((inData[off+3] & 0xff) == 0xb3
|| (inData[off+3] & 0xff) == 0xb8) {
MPEGSegment ns =
new MPEGSegment((inData[off+3] & 0xff),
off, inBuffer);
segmentQueue.addElement(ns);
return;
}
} else {
MPEGSegment ns = new MPEGSegment((inData[off+3] & 0xff),
off, inBuffer);
segmentQueue.addElement(ns);
return;
}
}
}
off++;
len--;
}
// didn't find anything, try the next buffer
expectingNewInput = true;
}
/*
* If length == -1, the end of segment hasn't been determined.
* offset is absolute in buffer (no need to add buffer's offset).
* The most common case is a segment is contained in a single
* buffer so endBuffer is null.
* Assumption: a segment will never span more than two buffers.
*/
class MPEGSegment {
int startCode = -1;
int offset = -1; // offset in startBuffer for the start code
int length = -1;
Buffer startBuffer = null;
Buffer endBuffer = null;
MPEGSegment(int code, int off, Buffer buf) {
startCode = code;
offset = off;
startBuffer = buf;
}
// off is relative to start of segment
void copyData(byte[] dest, int outoffset) {
copyData(0, length, dest, outoffset);
}
// off is relative to start of segment
void copyData(int off, byte[] dest, int outoffset) {
copyData(off, length - off, dest, outoffset);
}
// off is relative to start of segment
void copyData(int off, int len, byte[] dest, int outoffset) {
if (off + len > length) {
len = length - off;
}
if (endBuffer == null) {
// completely contained in single buffer
System.arraycopy(startBuffer.getData(), offset + off,
dest, outoffset, len);
return;
}
// len1 = portion of segment in startBuffer
// len2 = portion of segment in endBuffer
int len1 = startBuffer.getLength()
- (offset - startBuffer.getOffset());
int len2 = length - len1;
if (off + len <= len1) {
// still only copying from first buffer
System.arraycopy(startBuffer.getData(), offset + off,
dest, outoffset, len);
return;
}
if (off >= len1) {
// only copying from second buffer
off -= len1;
System.arraycopy(endBuffer.getData(),
endBuffer.getOffset() + off,
dest, outoffset, len);
return;
}
// worst case, part of first buffer plus part of second buffer
int l = len1 - off;
System.arraycopy(startBuffer.getData(), offset + off,
dest, outoffset, l);
len -= l; // remaining length to copy from second buffer
System.arraycopy(endBuffer.getData(), endBuffer.getOffset(),
dest, outoffset + l, len);
}
int getLength() {
if (length < 0)
calculateLength();
return length;
}
private void calculateLength() {
if (length > 0)
return;
int off = findNextStart(); // try in same buffer
if (off > offset) {
length = off - offset;
return;
}
if (inputEOM) {
// at EOM and no more start codes, consume remainder of buffer
length = startBuffer.getLength()
- (offset - startBuffer.getOffset());
return;
}
if (endBuffer == null) {
if (inputQueue.isEmpty())
return; // need to get another buffer
endBuffer = (Buffer) inputQueue.firstElement();
inputQueue.removeElementAt(0);
}
// handle case where start code straddles buffers
off = findNextStartBetweenBuffers();
if (off > offset) {
length = off - offset;
return;
}
off = findNextStartInEndBuffer();
length = startBuffer.getLength()
- (offset - startBuffer.getOffset());
length += off - endBuffer.getOffset();
}
private int findNextStart() {
byte[] inData = (byte[]) startBuffer.getData();
int off = offset + 4;
int len = startBuffer.getLength()
- ((offset + 4) - startBuffer.getOffset());
while (len > 3) {
if (inData[off] == 0
&& inData[off+1] == 0
&& inData[off+2] == 1) {
// treat extension and user_data as part of current header
if ((inData[off+3] & 0xff) != 0xb5
&& (inData[off+3] & 0xff) != 0xb2) {
MPEGSegment ns = new MPEGSegment((inData[off+3] & 0xff),
off, startBuffer);
segmentQueue.addElement(ns);
return off;
}
}
off++;
len--;
}
return -1;
}
// ugly brute force check for start code beginning in last 3 bytes
// of startBuffer
private int findNextStartBetweenBuffers() {
byte[] inData = (byte[]) startBuffer.getData();
byte[] inData2 = (byte[]) endBuffer.getData();
int off = startBuffer.getOffset() + startBuffer.getLength() - 3;
if (off <= offset)
return -1; // already spanning buffer, look beyond here
int off2 = endBuffer.getOffset();
if (inData[off] == 0 && inData[off+1] == 0 && inData[off+2] == 1) {
// treat extension and user_data as part of current header
if ((inData2[off2] & 0xff) != 0xb5
&& (inData[off2] & 0xff) != 0xb2) {
MPEGSegment ns = new MPEGSegment((inData2[off2] & 0xff),
off, startBuffer);
ns.endBuffer = endBuffer;
segmentQueue.addElement(ns);
endBuffer = null; // not needed for this segment
return off;
}
}
if (inData[off+1] == 0 && inData[off+2] == 0
&& inData2[off2] == 1) {
// treat extension and user_data as part of current header
if ((inData2[off2+1] & 0xff) != 0xb5
&& (inData[off2+1] & 0xff) != 0xb2) {
MPEGSegment ns = new MPEGSegment((inData2[off2+1] & 0xff),
off+1, startBuffer);
ns.endBuffer = endBuffer;
segmentQueue.addElement(ns);
endBuffer = null; // not needed for this segment
return off+1;
}
}
if (inData[off+2] == 0 && inData2[off2] == 0
&& inData2[off2+1] == 1) {
// treat extension and user_data as part of current header
if ((inData2[off2+2] & 0xff) != 0xb5
&& (inData[off2+2] & 0xff) != 0xb2) {
MPEGSegment ns = new MPEGSegment((inData2[off2+2] & 0xff),
off+2, startBuffer);
ns.endBuffer = endBuffer;
segmentQueue.addElement(ns);
endBuffer = null; // not needed for this segment
return off+2;
}
}
return -1;
}
private int findNextStartInEndBuffer() {
byte[] inData = (byte[]) endBuffer.getData();
int off = endBuffer.getOffset();
int len = endBuffer.getLength();
while (len > 3) {
if (inData[off] == 0
&& inData[off+1] == 0
&& inData[off+2] == 1) {
// treat extension and user_data as part of current header
if ((inData[off+3] & 0xff) != 0xb5
&& (inData[off+3] & 0xff) != 0xb2) {
MPEGSegment ns = new MPEGSegment((inData[off+3] & 0xff),
off, endBuffer);
segmentQueue.addElement(ns);
return off;
}
}
off++;
len--;
}
return -1;
}
}
}