tv.danmaku.ijk.media.drm.upstream

接口 DataSource

所有超级接口:

DataReader

所有已知子接口:

HttpDataSource

所有已知实现类:

BaseDataSource, DefaultHttpDataSource, StatsDataSource

public interface DataSource
extends DataReader

Reads data from URI-identified resources.

嵌套类概要

嵌套类

限定符和类型	接口和说明
static interface	DataSource.Factory A factory for DataSource instances.

方法概要

限定符和类型	方法和说明
void	addTransferListener(TransferListener transferListener) Adds a TransferListener to listen to data transfers.
void	close() Closes the source.
default java.util.Map<java.lang.String,java.util.List<java.lang.String>>	getResponseHeaders() When the source is open, returns the response headers associated with the last open(tv.danmaku.ijk.media.drm.upstream.DataSpec) call.
android.net.Uri	getUri() When the source is open, returns the Uri from which data is being read.
long	open(DataSpec dataSpec) Opens the source to read the specified data.

从接口继承的方法 tv.danmaku.ijk.media.drm.upstream.DataReader

read

方法详细资料

addTransferListener

void addTransferListener(TransferListener transferListener)

Adds a TransferListener to listen to data transfers. This method is not thread-safe.

参数:

transferListener - A TransferListener.

open

long open(DataSpec dataSpec)
   throws java.io.IOException

Opens the source to read the specified data.

Note: If an IOException is thrown, callers must still call close() to ensure that any partial effects of the invocation are cleaned up.

参数:

dataSpec - Defines the data to be read.

返回:

The number of bytes that can be read from the opened source. For unbounded requests (i.e. requests where DataSpec.length equals C.LENGTH_UNSET) this value is the resolved length of the request, or C.LENGTH_UNSET if the length is still unresolved. For all other requests, the value returned will be equal to the request's DataSpec.length.

抛出:

java.io.IOException - If an error occurs opening the source. DataSourceException can be thrown or used as a cause of the thrown exception to specify the reason of the error.

getUri

android.net.Uri getUri()

When the source is open, returns the Uri from which data is being read. The returned Uri will be identical to the one passed open(DataSpec) in the DataSpec unless redirection has occurred. If redirection has occurred, the Uri after redirection is returned.

返回:

The Uri from which data is being read, or null if the source is not open.

getResponseHeaders

default java.util.Map<java.lang.String,java.util.List<java.lang.String>> getResponseHeaders()

When the source is open, returns the response headers associated with the last open(tv.danmaku.ijk.media.drm.upstream.DataSpec) call. Otherwise, returns an empty map.

Key look-up in the returned map is case-insensitive.

close

void close()
    throws java.io.IOException

Closes the source.

Note: This method must be called even if the corresponding call to open(DataSpec) threw an IOException. See open(DataSpec) for more details.

抛出:

java.io.IOException - If an error occurs closing the source.