DataSourceCallback

Added in 1.0.0
Deprecated in 1.3.0

public abstract class DataSourceCallback implements Closeable


For supplying media data, implement this if your app has special requirements for the way media data is obtained.

Methods of this interface may be called on multiple different threads. There will be a thread synchronization point between each call to ensure that modifications to the state of your DataSourceCallback are visible to future calls. This means you don't need to do your own synchronization unless you're modifying the DataSourceCallback from another thread while it's being used by the media library.

Summary

Public constructors

Public methods

abstract long

Called to get the size of the data source.

abstract int
readAt(long position, @NonNull byte[] buffer, int offset, int size)

Called to request data from the given position.

Inherited methods

From java.io.Closeable
abstract void

Public constructors

DataSourceCallback

Added in 1.0.0
Deprecated in 1.3.0
public DataSourceCallback()

Public methods

getSize

Added in 1.0.0
Deprecated in 1.3.0
public abstract long getSize()

Called to get the size of the data source.

Returns
long

the size of data source in bytes, or -1 if the size is unknown.

Throws
java.io.IOException

on fatal errors

readAt

Added in 1.0.0
Deprecated in 1.3.0
public abstract int readAt(long position, @NonNull byte[] buffer, int offset, int size)

Called to request data from the given position. Implementations should should write up to size bytes into buffer, and return the number of bytes written. Return 0 if size is zero (thus no bytes are read). Return -1 to indicate that end of stream is reached.

Parameters
long position

the position in the media item to read from.

@NonNull byte[] buffer

the buffer to read the data into.

int offset

the offset within buffer to read the data into.

int size

the number of bytes to read.

Returns
int

the number of bytes read, or -1 if the end of stream was reached.

Throws
java.io.IOException

on fatal errors.