org.red5.server.net.rtmp

Class RTMPUtils

java.lang.Object

org.red5.server.net.rtmp.RTMPUtils

All Implemented Interfaces:

Constants

public class RTMPUtils
extends Object
implements Constants

RTMP utilities class.

Author:

The Red5 Project, Luke Hubbard, Codegent Ltd (luke@codegent.com), Art Clarke (aclarke@xuggle.com)

Field Summary

Fields inherited from interface org.red5.server.net.rtmp.message.Constants

HANDSHAKE_SIZE, HEADER_CONTINUE, HEADER_NEW, HEADER_SAME_SOURCE, HEADER_TIMER_CHANGE, MEDIUM_INT_MAX, SO_CLIENT_CLEAR_DATA, SO_CLIENT_DELETE_DATA, SO_CLIENT_INITIAL_DATA, SO_CLIENT_SEND_MESSAGE, SO_CLIENT_STATUS, SO_CLIENT_UPDATE_ATTRIBUTE, SO_CLIENT_UPDATE_DATA, SO_CONNECT, SO_DELETE_ATTRIBUTE, SO_DISCONNECT, SO_SEND_MESSAGE, SO_SET_ATTRIBUTE, SOURCE_TYPE_LIVE, SOURCE_TYPE_VOD, TYPE_ABORT, TYPE_AGGREGATE, TYPE_AUDIO_DATA, TYPE_BYTES_READ, TYPE_CHUNK_SIZE, TYPE_CLIENT_BANDWIDTH, TYPE_EDGE_ORIGIN, TYPE_FLEX_MESSAGE, TYPE_FLEX_SHARED_OBJECT, TYPE_FLEX_STREAM_SEND, TYPE_INVOKE, TYPE_NOTIFY, TYPE_PING, TYPE_SERVER_BANDWIDTH, TYPE_SHARED_OBJECT, TYPE_STREAM_METADATA, TYPE_VIDEO_DATA

Constructor Summary

Constructors

Constructor and Description
RTMPUtils()

Method Summary

Modifier and Type	Method and Description
static int	compareTimestamps(int a, int b) Compares two RTMP time stamps, accounting for time stamp wrapping.
static int	decodeChannelId(int header, int byteCount) Decode channel id.
static byte	decodeHeaderSize(int header, int byteCount) Decode header size.
static long	diffTimestamps(int a, int b) Calculates the delta between two time stamps, adjusting for time stamp wrapping.
static void	encodeHeaderByte(org.apache.mina.core.buffer.IoBuffer out, byte headerSize, int channelId) Encodes header size marker and channel id into header marker.
static int	getHeaderLength(byte headerSize) Return header length from marker value.
static int	readMediumInt(org.apache.mina.core.buffer.IoBuffer in) Read 24 bit integer.
static int	readReverseInt(org.apache.mina.core.buffer.IoBuffer in) Read integer in reversed order.
static int	readUnsignedMediumInt(org.apache.mina.core.buffer.IoBuffer in) Read unsigned 24 bit integer.
static void	writeMediumInt(org.apache.mina.core.buffer.IoBuffer out, int value)
static void	writeReverseInt(org.apache.mina.core.buffer.IoBuffer out, int value) Writes reversed integer to buffer.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

RTMPUtils

public RTMPUtils()

Method Detail

writeReverseInt

public static void writeReverseInt(org.apache.mina.core.buffer.IoBuffer out,
                                   int value)

Writes reversed integer to buffer.

Parameters:

out - Buffer

value - Integer to write

writeMediumInt

public static void writeMediumInt(org.apache.mina.core.buffer.IoBuffer out,
                                  int value)

Parameters:

out - output buffer

value - value to write

readUnsignedMediumInt

public static int readUnsignedMediumInt(org.apache.mina.core.buffer.IoBuffer in)

Read unsigned 24 bit integer.

Parameters:

in - input

Returns:

unsigned int

readMediumInt

public static int readMediumInt(org.apache.mina.core.buffer.IoBuffer in)

Read 24 bit integer.

Parameters:

in - input

Returns:

signed 3 byte int

readReverseInt

public static int readReverseInt(org.apache.mina.core.buffer.IoBuffer in)

Read integer in reversed order.

Parameters:

in - Input buffer

Returns:

Integer

encodeHeaderByte

public static void encodeHeaderByte(org.apache.mina.core.buffer.IoBuffer out,
                                    byte headerSize,
                                    int channelId)

Encodes header size marker and channel id into header marker.

Parameters:

out - output buffer

headerSize - Header size marker

channelId - Channel used

decodeChannelId

public static int decodeChannelId(int header,
                                  int byteCount)

Decode channel id.

Parameters:

header - Header

byteCount - byte count

Returns:

Channel id

decodeHeaderSize

public static byte decodeHeaderSize(int header,
                                    int byteCount)

Decode header size.

Parameters:

header - Header byte

byteCount - byte count

Returns:

Header size byte

getHeaderLength

public static int getHeaderLength(byte headerSize)

Return header length from marker value.

Parameters:

headerSize - Header size marker value

Returns:

Header length

compareTimestamps

public static int compareTimestamps(int a,
                                    int b)

Compares two RTMP time stamps, accounting for time stamp wrapping.

Parameters:

a - First time stamp

b - Second time stamp

Returns:

-1 if a < b, 1 if a > b, or 0 if a == b

diffTimestamps

public static long diffTimestamps(int a,
                                  int b)

Calculates the delta between two time stamps, adjusting for time stamp wrapping.

Parameters:

a - First time stamp

b - Second time stamp

Returns:

the distance between a and b, which will be negative if a is less than b.