tv.danmaku.ijk.media.drm.upstream

Class StatsDataSource

java.lang.Object

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

All Implemented Interfaces:

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.

Nested Class Summary

Nested classes/interfaces inherited from interface tv.danmaku.ijk.media.drm.upstream.DataSource

DataSource.Factory

Constructor Summary

Constructors

Constructor and Description
StatsDataSource(DataSource dataSource) Creates the stats data source.

Method Summary

Modifier and Type	Method and Description
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.

Methods inherited from class java.lang.Object

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

Constructor Detail

StatsDataSource

public StatsDataSource(DataSource dataSource)

Creates the stats data source.

Parameters:

dataSource - The wrapped DataSource.

Method Detail

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)

Description copied from interface: DataSource

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

Specified by:

addTransferListener in interface DataSource

Parameters:

transferListener - A TransferListener.

open

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

Description copied from interface: 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.

Specified by:

open in interface DataSource

Parameters:

dataSpec - Defines the data to be read.

Returns:

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.

Throws:

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

Description copied from interface: 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.

Specified by:

read in interface DataReader

Parameters:

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.

Returns:

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.

Throws:

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

getUri

public android.net.Uri getUri()

Description copied from interface: 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.

Specified by:

getUri in interface DataSource

Returns:

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()

Description copied from interface: 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.

Specified by:

getResponseHeaders in interface DataSource

close

public void close()
           throws java.io.IOException

Description copied from interface: 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.

Specified by:

close in interface DataSource

Throws:

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