net.sf.fmj.ffmpeg_java
Class PullDataSourceCallbackURLProtocolHandler

java.lang.Object
  net.sf.fmj.ffmpeg_java.PullDataSourceCallbackURLProtocolHandler

All Implemented Interfaces:

net.sf.ffmpeg_java.custom_protocol.CallbackURLProtocolHandler

public class PullDataSourceCallbackURLProtocolHandler
extends java.lang.Object
implements net.sf.ffmpeg_java.custom_protocol.CallbackURLProtocolHandler

Implements CallbackURLProtocolHandler by using a PullSourceStream. Because seeking functions have to be implemented, either the source has to be Cloneable, or the streams provided by the source have to be Seekable. Otherwise, seeking will fail, and ffmpeg does not really check for seek failures, it mostly just assumes they will work. This was written with an eye on ffmpeg's http.c, which shows that when a seek is needed, they simply open a new stream. http.c is not of course used when this is used, it just shows what kind of behavior is expected from a URLProtocol.

Author:

Ken Larson

Field Summary

static boolean

TRACE

Fields inherited from interface net.sf.ffmpeg_java.custom_protocol.CallbackURLProtocolHandler

SEEK_CUR, SEEK_END, SEEK_SET

Constructor Summary

PullDataSourceCallbackURLProtocolHandler(PullDataSource source)

Method Summary

int	close(net.sf.ffmpeg_java.AVFormatLibrary.URLContext h)
int	open(net.sf.ffmpeg_java.AVFormatLibrary.URLContext h, java.lang.String filename, int flags)
int	read(net.sf.ffmpeg_java.AVFormatLibrary.URLContext h, com.sun.jna.Pointer buf, int size)
long	seek(net.sf.ffmpeg_java.AVFormatLibrary.URLContext h, long pos, int whence)
int	write(net.sf.ffmpeg_java.AVFormatLibrary.URLContext h, com.sun.jna.Pointer buf, int size)

Methods inherited from class java.lang.Object

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

Field Detail

TRACE

public static final boolean TRACE

See Also:

Constant Field Values

Constructor Detail

PullDataSourceCallbackURLProtocolHandler

public PullDataSourceCallbackURLProtocolHandler(PullDataSource source)

Method Detail

open

public int open(net.sf.ffmpeg_java.AVFormatLibrary.URLContext h,
                java.lang.String filename,
                int flags)

Specified by:

open in interface net.sf.ffmpeg_java.custom_protocol.CallbackURLProtocolHandler

read

public int read(net.sf.ffmpeg_java.AVFormatLibrary.URLContext h,
                com.sun.jna.Pointer buf,
                int size)

Specified by:

read in interface net.sf.ffmpeg_java.custom_protocol.CallbackURLProtocolHandler

write

public int write(net.sf.ffmpeg_java.AVFormatLibrary.URLContext h,
                 com.sun.jna.Pointer buf,
                 int size)

Specified by:

write in interface net.sf.ffmpeg_java.custom_protocol.CallbackURLProtocolHandler

seek

public long seek(net.sf.ffmpeg_java.AVFormatLibrary.URLContext h,
                 long pos,
                 int whence)

Specified by:

seek in interface net.sf.ffmpeg_java.custom_protocol.CallbackURLProtocolHandler

close

public int close(net.sf.ffmpeg_java.AVFormatLibrary.URLContext h)

Specified by:

close in interface net.sf.ffmpeg_java.custom_protocol.CallbackURLProtocolHandler