Package dev.lavalink.youtube.sabr

Class UmpReader

java.lang.Object

dev.lavalink.youtube.sabr.UmpReader

public class UmpReader
extends Object

Parser for YouTube's UMP (Universal/Ultra Media Playback) container format, which wraps SABR streaming responses. A UMP payload is a sequence of parts, each encoded as [varint partType][varint partSize][partSize bytes of data].

Note: UMP uses its own variable-length integer encoding which differs from the LEB128 varint used by protocol buffers. The number of bytes is derived from the high bits of the first byte, and the value is little-endian.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static interface	UmpReader.PartHandler

Field Summary

Fields

Modifier and Type	Field	Description
static final int	FORMAT_INITIALIZATION_METADATA
static final int	MEDIA
static final int	MEDIA_END
static final int	MEDIA_HEADER
static final int	NEXT_REQUEST_POLICY
static final int	RELOAD_PLAYER_RESPONSE
static final int	SABR_CONTEXT_SENDING_POLICY
static final int	SABR_CONTEXT_UPDATE
static final int	SABR_ERROR
static final int	SABR_REDIRECT
static final int	STREAM_PROTECTION_STATUS

Constructor Summary

Constructors

Constructor	Description
UmpReader(@org.jetbrains.annotations.NotNull byte[] data)

Method Summary

Modifier and Type	Method	Description
void	read(@NotNull UmpReader.PartHandler handler)	Reads every complete part from the buffer, invoking the handler for each.

Methods inherited from class java.lang.Object

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

Field Details

MEDIA_HEADER

public static final int MEDIA_HEADER

See Also:

• Constant Field Values

MEDIA

public static final int MEDIA

See Also:

• Constant Field Values

MEDIA_END

public static final int MEDIA_END

See Also:

• Constant Field Values

NEXT_REQUEST_POLICY

public static final int NEXT_REQUEST_POLICY

See Also:

• Constant Field Values

FORMAT_INITIALIZATION_METADATA

public static final int FORMAT_INITIALIZATION_METADATA

See Also:

• Constant Field Values

SABR_REDIRECT

public static final int SABR_REDIRECT

See Also:

• Constant Field Values

SABR_ERROR

public static final int SABR_ERROR

See Also:

• Constant Field Values

RELOAD_PLAYER_RESPONSE

public static final int RELOAD_PLAYER_RESPONSE

See Also:

• Constant Field Values

SABR_CONTEXT_UPDATE

public static final int SABR_CONTEXT_UPDATE

See Also:

• Constant Field Values

STREAM_PROTECTION_STATUS

public static final int STREAM_PROTECTION_STATUS

See Also:

• Constant Field Values

SABR_CONTEXT_SENDING_POLICY

public static final int SABR_CONTEXT_SENDING_POLICY

See Also:

• Constant Field Values

Constructor Details

UmpReader

public UmpReader(@NotNull
 @org.jetbrains.annotations.NotNull byte[] data)

Method Details

read

public void read(@NotNull
 @NotNull UmpReader.PartHandler handler)
          throws Exception

Reads every complete part from the buffer, invoking the handler for each.

Throws:

Exception