tv.danmaku.ijk.media.drm.upstream

类 StatsDataSource

java.lang.Object

tv.danmaku.ijk.media.drm.upstream.StatsDataSource

所有已实现的接口:

DataReader, DataSource

public final class StatsDataSource
extends java.lang.Object
implements DataSource

DataSource wrapper which keeps track of bytes transferred, redirected uris, and response headers.

嵌套类概要

从接口继承的嵌套类/接口 tv.danmaku.ijk.media.drm.upstream.DataSource

DataSource.Factory

构造器概要

构造器

构造器和说明
StatsDataSource(DataSource dataSource) Creates the stats data source.

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.
long	getBytesRead() Returns the total number of bytes that have been read from the data source.
android.net.Uri	getLastOpenedUri() Returns the Uri associated with the last open(DataSpec) call.
java.util.Map<java.lang.String,java.util.List<java.lang.String>>	getLastResponseHeaders() Returns the response headers associated with the last open(DataSpec) call.
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 DataSource.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.
int	read(byte[] buffer, int offset, int readLength) Reads up to length bytes of data from the input.
void	resetBytesRead() Resets the number of bytes read as returned from getBytesRead() to zero.

从类继承的方法 java.lang.Object

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

构造器详细资料

StatsDataSource

public StatsDataSource(DataSource dataSource)

Creates the stats data source.

参数:

dataSource - The wrapped DataSource.

方法详细资料

resetBytesRead

public void resetBytesRead()

Resets the number of bytes read as returned from getBytesRead() to zero.

getBytesRead

public long getBytesRead()

Returns the total number of bytes that have been read from the data source.

getLastOpenedUri

public android.net.Uri getLastOpenedUri()

Returns the Uri associated with the last open(DataSpec) call. If redirection occurred, this is the redirected uri.

getLastResponseHeaders

public java.util.Map<java.lang.String,java.util.List<java.lang.String>> getLastResponseHeaders()

Returns the response headers associated with the last open(DataSpec) call.

addTransferListener

public void addTransferListener(TransferListener transferListener)

从接口复制的说明: DataSource

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

指定者:

addTransferListener 在接口中 DataSource

参数:

transferListener - A TransferListener.

open

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

从接口复制的说明: DataSource

Opens the source to read the specified data.

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

指定者:

open 在接口中 DataSource

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.

read

public int read(byte[] buffer,
                int offset,
                int readLength)
         throws java.io.IOException

从接口复制的说明: DataReader

Reads up to length bytes of data from the input.

If readLength is zero then 0 is returned. Otherwise, if no data is available because the end of the opened range has been reached, then C.RESULT_END_OF_INPUT is returned. Otherwise, the call will block until at least one byte of data has been read and the number of bytes read is returned.

指定者:

read 在接口中 DataReader

参数:

buffer - A target array into which data should be written.

offset - The offset into the target array at which to write.

readLength - The maximum number of bytes to read from the input.

返回:

The number of bytes read, or C.RESULT_END_OF_INPUT if the input has ended. This may be less than length because the end of the input (or available data) was reached, the method was interrupted, or the operation was aborted early for another reason.

抛出:

java.io.IOException - If an error occurs reading from the input.

getUri

public android.net.Uri getUri()

从接口复制的说明: DataSource

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

指定者:

getUri 在接口中 DataSource

返回:

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

getResponseHeaders

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

从接口复制的说明: DataSource

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

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

指定者:

getResponseHeaders 在接口中 DataSource

close

public void close()
           throws java.io.IOException

从接口复制的说明: DataSource

Closes the source.

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

指定者:

close 在接口中 DataSource

抛出:

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