vil1_jpeg_decompressor Class Reference

#include <vil1_jpeg_decompressor.h>

List of all members.

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Detailed Description

Definition at line 14 of file vil1_jpeg_decompressor.h.

Public Member Functions
	vil1_jpeg_decompressor (vil1_stream *s)
	using jpeg decompressor objects :.
	~vil1_jpeg_decompressor ()
JSAMPLE const *	read_scanline (unsigned line)
Public Attributes
jpeg_error_mgr	jerr
jpeg_decompress_struct	jobj
vil1_stream *	stream
Private Attributes
bool	ready
bool	valid
JSAMPLE *	biffer

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Constructor & Destructor Documentation

vil1_jpeg_decompressor::vil1_jpeg_decompressor

(

vil1_stream *

s

)

using jpeg decompressor objects :.

1. supply an error manager, e.g. with jpeg_std_err(). this *must* be done before initializing the object.
2. initialize with jpeg_create_decompress().
3. supply a data stream, e.g. with jpeg_std_source().
4. call jpeg_read_header() to start reading the data stream. this will read to the start of the compressed data and store various tables and parameters. if you just want the image parameters and not the data, it's ok to stop now, so long as you call jpeg_abort_decompress() or jpeg_destroy_decompress() to release resources.
5. call jpeg_finish_decompress() if you read all the data. if you only read some of the data, call jpeg_abort_decompress().
6. destruct the object with jpeg_destroy_decompress().

Definition at line 30 of file vil1_jpeg_decompressor.cxx.

vil1_jpeg_decompressor::~vil1_jpeg_decompressor

(

)

Definition at line 136 of file vil1_jpeg_decompressor.cxx.

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Member Function Documentation

JSAMPLE const * vil1_jpeg_decompressor::read_scanline

(

unsigned

line

)

Definition at line 67 of file vil1_jpeg_decompressor.cxx.

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Member Data Documentation

struct jpeg_error_mgr vil1_jpeg_decompressor::jerr

Definition at line 17 of file vil1_jpeg_decompressor.h.

struct jpeg_decompress_struct vil1_jpeg_decompressor::jobj

Definition at line 18 of file vil1_jpeg_decompressor.h.

vil1_stream* vil1_jpeg_decompressor::stream

Definition at line 19 of file vil1_jpeg_decompressor.h.

bool vil1_jpeg_decompressor::ready [private]

Definition at line 32 of file vil1_jpeg_decompressor.h.

bool vil1_jpeg_decompressor::valid [private]

Definition at line 33 of file vil1_jpeg_decompressor.h.

JSAMPLE* vil1_jpeg_decompressor::biffer [private]

Definition at line 40 of file vil1_jpeg_decompressor.h.

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

• core/vil1/file_formats/vil1_jpeg_decompressor.h
• core/vil1/file_formats/vil1_jpeg_decompressor.cxx

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