com.smaxe.uv.fformat

Class Flv

java.lang.Object

com.smaxe.uv.fformat.Flv

public final class Flv
extends java.lang.Object

Flv - FLV file format parser.

Format:
[Header][PreviousTagSize0 (U32)][Tag1][PreviousTagSize1 (U32)][Tag2].... , where PreviousTagSize* is size of previous tag, including its header. For FLV version 1, this value is 11 plus the DataSize of the previous tag.

Author:

Andrei Sochirca

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	Flv.Header Header - FLV file header.
static interface	Flv.ITagProcessor ITagProcessor - tag processor.
static class	Flv.ScriptData ScriptData - script data.
static class	Flv.Tag Tag - FLV file tag.
static class	Flv.TagProcessorAdapter TagProcessorAdapter - Flv.ITagProcessor adapter.

Method Summary

Methods

Modifier and Type	Method and Description
static void	checkHeader(byte[] buf, int offset) Checks the header buf of the FLV file correctness.
static int	getAudioCodecByFlvTagCodec(int codec) Returns audio codec id by flv tag codec.
static int	getVideoCodecByFlvTagCodec(int codec) Returns video codec id by flv tag codec.
static Flv.Header	readHeader(byte[] buf, int offset) Reads the FLV file header from the byte array.
static Flv.Header	readHeader(java.io.InputStream is) Reads the FLV file header from the is and points to the first file tag.
static Flv.ScriptData[]	readScriptData(java.io.InputStream is, int length) Reads script data from the is.
static int	readTag(java.io.InputStream is, Flv.ITagProcessor processor) Reads the tag from the is
static int	writeHeader(byte[] buf, int offset, Flv.Header header) Writes the FLV file header to the buf buffer starting with offset.
static void	writeHeader(java.io.OutputStream os, Flv.Header header) Writes the FLV file header to the os.
static void	writeScriptData(java.io.OutputStream os, Flv.ScriptData[] scriptData) Writes script data to the os.
static int	writeTag(java.io.OutputStream os, int type, long timestamp, byte[] buf, int offset, int length) Writes tag to the os.
static int	writeTagHeader(byte[] buf, int offset, int type, long timestamp, int dataSize) Writes tag header to the buf buffer starting with offset.
static int	writeTagHeader(java.io.OutputStream os, int type, long timestamp, int dataSize) Writes tag header to the os.
static int	writeTagTrailer(byte[] buf, int offset, int dataSize) Writes tag header to the buf buffer starting with offset.
static int	writeTagTrailer(java.io.OutputStream os, int dataSize) Writes tag trailer to the os.

Methods inherited from class java.lang.Object

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

Method Detail

getAudioCodecByFlvTagCodec

public static int getAudioCodecByFlvTagCodec(int codec)

Returns audio codec id by flv tag codec.

Parameters:

codec -

Returns:

audio codec

getVideoCodecByFlvTagCodec

public static int getVideoCodecByFlvTagCodec(int codec)

Returns video codec id by flv tag codec.

Parameters:

codec -

Returns:

video codec

checkHeader

public static void checkHeader(byte[] buf,
               int offset)

Checks the header buf of the FLV file correctness.

Parameters:

buf - header buffer

offset - header buffer offset

readHeader

public static Flv.Header readHeader(byte[] buf,
                    int offset)

Reads the FLV file header from the byte array.

Parameters:

buf -

offset -

Returns:

flv file header

readHeader

public static Flv.Header readHeader(java.io.InputStream is)
                             throws java.io.IOException

Reads the FLV file header from the is and points to the first file tag.

Parameters:

is -

Returns:

flv file header

Throws:

java.io.IOException - if an I/O exception occurred

writeHeader

public static int writeHeader(byte[] buf,
              int offset,
              Flv.Header header)

Writes the FLV file header to the buf buffer starting with offset.

Parameters:

buf -

offset -

header -

Returns:

number of written bytes

writeHeader

public static void writeHeader(java.io.OutputStream os,
               Flv.Header header)
                        throws java.io.IOException

Writes the FLV file header to the os.

Parameters:

os -

header - flv file header

Throws:

java.io.IOException - if an I/O exception occurred

readTag

public static int readTag(java.io.InputStream is,
          Flv.ITagProcessor processor)
                   throws java.io.IOException

Reads the tag from the is

Parameters:

is -

processor - tag processor

Returns:

tag type, -1 if tag is not read

Throws:

java.io.IOException - if an I/O exception occurred

writeTag

public static int writeTag(java.io.OutputStream os,
           int type,
           long timestamp,
           byte[] buf,
           int offset,
           int length)
                    throws java.io.IOException

Writes tag to the os.

Parameters:

os -

type - tag type

timestamp - tag timestamp

buf - data buffer

offset - data buffer offset

length - data buffer length

Returns:

number of written bytes

Throws:

java.io.IOException - if an I/O exception occurred

writeTagHeader

public static int writeTagHeader(byte[] buf,
                 int offset,
                 int type,
                 long timestamp,
                 int dataSize)

Writes tag header to the buf buffer starting with offset.

Parameters:

buf -

offset -

type - tag type

timestamp - tag timestamp

dataSize - data size

Returns:

number of written bytes

writeTagHeader

public static int writeTagHeader(java.io.OutputStream os,
                 int type,
                 long timestamp,
                 int dataSize)
                          throws java.io.IOException

Writes tag header to the os.

Parameters:

os -

type - tag type

timestamp - tag timestamp

dataSize - data size

Returns:

number of written bytes

Throws:

java.io.IOException - if an I/O exception occurred

writeTagTrailer

public static int writeTagTrailer(byte[] buf,
                  int offset,
                  int dataSize)

Writes tag header to the buf buffer starting with offset.

Parameters:

buf -

offset -

dataSize - data size

Returns:

number of written bytes

writeTagTrailer

public static int writeTagTrailer(java.io.OutputStream os,
                  int dataSize)
                           throws java.io.IOException

Writes tag trailer to the os.

Parameters:

os -

dataSize - data size

Returns:

number of written bytes

Throws:

java.io.IOException - if an I/O exception occurred

readScriptData

public static Flv.ScriptData[] readScriptData(java.io.InputStream is,
                              int length)
                                       throws java.io.IOException

Reads script data from the is.

Parameters:

is -

length - data length

Returns:

script data

Throws:

java.io.IOException - if an I/O exception occurred

writeScriptData

public static void writeScriptData(java.io.OutputStream os,
                   Flv.ScriptData[] scriptData)
                            throws java.io.IOException

Writes script data to the os.

Parameters:

os -

scriptData - script data

Throws:

java.io.IOException - if an I/O exception occurred