OpenShot Library | libopenshot-audio 0.2.0
juce::GZIPCompressorOutputStream Class Reference

A stream which uses zlib to compress the data written into it. More...

#include <juce_GZIPCompressorOutputStream.h>

+ Inheritance diagram for juce::GZIPCompressorOutputStream:

Classes

class  GZIPCompressorHelper
 

Public Types

enum  WindowBitsValues { windowBitsRaw = -15 , windowBitsGZIP = 15 + 16 }
 These are preset values that can be used for the constructor's windowBits parameter. More...
 

Public Member Functions

 GZIPCompressorOutputStream (OutputStream &destStream, int compressionLevel=-1, int windowBits=0)
 Creates a compression stream.
 
 GZIPCompressorOutputStream (OutputStream *destStream, int compressionLevel=-1, bool deleteDestStreamWhenDestroyed=false, int windowBits=0)
 Creates a compression stream.
 
 ~GZIPCompressorOutputStream () override
 Destructor.
 
void flush () override
 Flushes and closes the stream.
 
int64 getPosition () override
 Returns the stream's current position.
 
bool setPosition (int64) override
 Tries to move the stream's output position.
 
bool write (const void *, size_t) override
 Writes a block of data to the stream.
 
- Public Member Functions inherited from juce::OutputStream
virtual ~OutputStream ()
 Destructor.
 
virtual void flush ()=0
 If the stream is using a buffer, this will ensure it gets written out to the destination.
 
virtual bool setPosition (int64 newPosition)=0
 Tries to move the stream's output position.
 
virtual int64 getPosition ()=0
 Returns the stream's current position.
 
virtual bool write (const void *dataToWrite, size_t numberOfBytes)=0
 Writes a block of data to the stream.
 
virtual bool writeByte (char byte)
 Writes a single byte to the stream.
 
virtual bool writeBool (bool boolValue)
 Writes a boolean to the stream as a single byte.
 
virtual bool writeShort (short value)
 Writes a 16-bit integer to the stream in a little-endian byte order.
 
virtual bool writeShortBigEndian (short value)
 Writes a 16-bit integer to the stream in a big-endian byte order.
 
virtual bool writeInt (int value)
 Writes a 32-bit integer to the stream in a little-endian byte order.
 
virtual bool writeIntBigEndian (int value)
 Writes a 32-bit integer to the stream in a big-endian byte order.
 
virtual bool writeInt64 (int64 value)
 Writes a 64-bit integer to the stream in a little-endian byte order.
 
virtual bool writeInt64BigEndian (int64 value)
 Writes a 64-bit integer to the stream in a big-endian byte order.
 
virtual bool writeFloat (float value)
 Writes a 32-bit floating point value to the stream in a binary format.
 
virtual bool writeFloatBigEndian (float value)
 Writes a 32-bit floating point value to the stream in a binary format.
 
virtual bool writeDouble (double value)
 Writes a 64-bit floating point value to the stream in a binary format.
 
virtual bool writeDoubleBigEndian (double value)
 Writes a 64-bit floating point value to the stream in a binary format.
 
virtual bool writeRepeatedByte (uint8 byte, size_t numTimesToRepeat)
 Writes a byte to the output stream a given number of times.
 
virtual bool writeCompressedInt (int value)
 Writes a condensed binary encoding of a 32-bit integer.
 
virtual bool writeString (const String &text)
 Stores a string in the stream in a binary format.
 
virtual bool writeText (const String &text, bool asUTF16, bool writeUTF16ByteOrderMark, const char *lineEndings)
 Writes a string of text to the stream.
 
virtual int64 writeFromInputStream (InputStream &source, int64 maxNumBytesToWrite)
 Reads data from an input stream and writes it to this stream.
 
void setNewLineString (const String &newLineString)
 Sets the string to write to the stream when a new line is written.
 
const StringgetNewLineString () const noexcept
 Returns the current new-line string that was set by setNewLineString().
 

Detailed Description

A stream which uses zlib to compress the data written into it.

Important note: When you call flush() on a GZIPCompressorOutputStream, the gzip data is closed - this means that no more data can be written to it, and any subsequent attempts to call write() will cause an assertion.

See also
GZIPDecompressorInputStream

Definition at line 42 of file juce_GZIPCompressorOutputStream.h.

Member Enumeration Documentation

◆ WindowBitsValues

These are preset values that can be used for the constructor's windowBits parameter.

For more info about this, see the zlib documentation for its windowBits parameter.

Definition at line 96 of file juce_GZIPCompressorOutputStream.h.

Constructor & Destructor Documentation

◆ GZIPCompressorOutputStream() [1/2]

juce::GZIPCompressorOutputStream::GZIPCompressorOutputStream ( OutputStream destStream,
int  compressionLevel = -1,
int  windowBits = 0 
)

Creates a compression stream.

Parameters
destStreamthe stream into which the compressed data will be written
compressionLevelhow much to compress the data, between 0 and 9, where 0 is non-compressed storage, 1 is the fastest/lowest compression, and 9 is the slowest/highest compression. Any value outside this range indicates that a default compression level should be used.
windowBitsthis is used internally to change the window size used by zlib - leave it as 0 unless you specifically need to set its value for some reason

Definition at line 116 of file juce_GZIPCompressorOutputStream.cpp.

◆ GZIPCompressorOutputStream() [2/2]

juce::GZIPCompressorOutputStream::GZIPCompressorOutputStream ( OutputStream destStream,
int  compressionLevel = -1,
bool  deleteDestStreamWhenDestroyed = false,
int  windowBits = 0 
)

Creates a compression stream.

Parameters
destStreamthe stream into which the compressed data will be written. Ownership of this object depends on the value of deleteDestStreamWhenDestroyed
compressionLevelhow much to compress the data, between 0 and 9, where 0 is non-compressed storage, 1 is the fastest/lowest compression, and 9 is the slowest/highest compression. Any value outside this range indicates that a default compression level should be used.
deleteDestStreamWhenDestroyedwhether or not the GZIPCompressorOutputStream will delete the destStream object when it is destroyed
windowBitsthis is used internally to change the window size used by zlib - leave it as 0 unless you specifically need to set its value for some reason

Definition at line 121 of file juce_GZIPCompressorOutputStream.cpp.

◆ ~GZIPCompressorOutputStream()

juce::GZIPCompressorOutputStream::~GZIPCompressorOutputStream ( )
override

Destructor.

Definition at line 128 of file juce_GZIPCompressorOutputStream.cpp.

References flush().

Member Function Documentation

◆ flush()

void juce::GZIPCompressorOutputStream::flush ( )
overridevirtual

Flushes and closes the stream.

Note that unlike most streams, when you call flush() on a GZIPCompressorOutputStream, the stream is closed - this means that no more data can be written to it, and any subsequent attempts to call write() will cause an assertion.

Implements juce::OutputStream.

Definition at line 133 of file juce_GZIPCompressorOutputStream.cpp.

Referenced by ~GZIPCompressorOutputStream().

◆ getPosition()

int64 juce::GZIPCompressorOutputStream::getPosition ( )
overridevirtual

Returns the stream's current position.

See also
setPosition

Implements juce::OutputStream.

Definition at line 146 of file juce_GZIPCompressorOutputStream.cpp.

◆ setPosition()

bool juce::GZIPCompressorOutputStream::setPosition ( int64  newPosition)
overridevirtual

Tries to move the stream's output position.

Not all streams will be able to seek to a new position - this will return false if it fails to work.

See also
getPosition

Implements juce::OutputStream.

Definition at line 151 of file juce_GZIPCompressorOutputStream.cpp.

◆ write()

bool juce::GZIPCompressorOutputStream::write ( const void *  dataToWrite,
size_t  numberOfBytes 
)
overridevirtual

Writes a block of data to the stream.

When creating a subclass of OutputStream, this is the only write method that needs to be overloaded - the base class has methods for writing other types of data which use this to do the work.

Parameters
dataToWritethe target buffer to receive the data. This must not be null.
numberOfBytesthe number of bytes to write.
Returns
false if the write operation fails for some reason

Implements juce::OutputStream.

Definition at line 139 of file juce_GZIPCompressorOutputStream.cpp.


The documentation for this class was generated from the following files: