hrplib
hrpUtil
Jpeg-6b
jcomapi.c
Go to the documentation of this file.
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/*
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* jcomapi.c
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*
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* Copyright (C) 1994-1997, Thomas G. Lane.
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* This file is part of the Independent JPEG Group's software.
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* For conditions of distribution and use, see the accompanying README file.
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*
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* This file contains application interface routines that are used for both
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* compression and decompression.
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*/
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#define JPEG_INTERNALS
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#include "
jinclude.h
"
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#include "
jpeglib.h
"
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/*
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* Abort processing of a JPEG compression or decompression operation,
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* but don't destroy the object itself.
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*
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* For this, we merely clean up all the nonpermanent memory pools.
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* Note that temp files (virtual arrays) are not allowed to belong to
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* the permanent pool, so we will be able to close all temp files here.
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* Closing a data source or destination, if necessary, is the application's
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* responsibility.
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*/
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GLOBAL
(
void
)
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jpeg_abort
(
j_common_ptr
cinfo)
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{
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int
pool;
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/* Do nothing if called on a not-initialized or destroyed JPEG object. */
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if
(cinfo->mem == NULL)
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return
;
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/* Releasing pools in reverse order might help avoid fragmentation
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* with some (brain-damaged) malloc libraries.
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*/
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for
(pool =
JPOOL_NUMPOOLS
-1; pool >
JPOOL_PERMANENT
; pool--) {
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(*cinfo->mem->free_pool) (cinfo, pool);
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}
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/* Reset overall state for possible reuse of object */
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if
(cinfo->is_decompressor) {
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cinfo->global_state =
DSTATE_START
;
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/* Try to keep application from accessing now-deleted marker list.
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* A bit kludgy to do it here, but this is the most central place.
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*/
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((
j_decompress_ptr
) cinfo)->marker_list = NULL;
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}
else
{
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cinfo->global_state =
CSTATE_START
;
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}
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}
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/*
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* Destruction of a JPEG object.
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*
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* Everything gets deallocated except the master jpeg_compress_struct itself
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* and the error manager struct. Both of these are supplied by the application
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* and must be freed, if necessary, by the application. (Often they are on
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* the stack and so don't need to be freed anyway.)
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* Closing a data source or destination, if necessary, is the application's
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* responsibility.
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*/
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GLOBAL
(
void
)
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jpeg_destroy
(
j_common_ptr
cinfo)
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{
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/* We need only tell the memory manager to release everything. */
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/* NB: mem pointer is NULL if memory mgr failed to initialize. */
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if
(cinfo->mem != NULL)
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(*cinfo->mem->self_destruct) (cinfo);
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cinfo->mem = NULL;
/* be safe if jpeg_destroy is called twice */
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cinfo->global_state = 0;
/* mark it destroyed */
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}
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/*
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* Convenience routines for allocating quantization and Huffman tables.
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* (Would jutils.c be a more reasonable place to put these?)
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*/
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GLOBAL
(
JQUANT_TBL
*)
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jpeg_alloc_quant_table
(
j_common_ptr
cinfo)
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{
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JQUANT_TBL
*tbl;
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tbl = (
JQUANT_TBL
*)
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(*cinfo->mem->alloc_small) (cinfo,
JPOOL_PERMANENT
,
SIZEOF
(
JQUANT_TBL
));
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tbl->
sent_table
=
FALSE
;
/* make sure this is false in any new table */
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return
tbl;
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}
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GLOBAL
(
JHUFF_TBL
*)
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jpeg_alloc_huff_table
(
j_common_ptr
cinfo)
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{
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JHUFF_TBL
*tbl;
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tbl = (
JHUFF_TBL
*)
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(*cinfo->mem->alloc_small) (cinfo,
JPOOL_PERMANENT
,
SIZEOF
(
JHUFF_TBL
));
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tbl->
sent_table
=
FALSE
;
/* make sure this is false in any new table */
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return
tbl;
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}
jpeg_destroy
jpeg_destroy(j_common_ptr cinfo)
Definition:
jcomapi.c:69
jpeglib.h
JHUFF_TBL
Definition:
jpeglib.h:100
jinclude.h
GLOBAL
#define GLOBAL(type)
Definition:
jmorecfg.h:188
jpeg_alloc_huff_table
jpeg_alloc_huff_table(j_common_ptr cinfo)
Definition:
jcomapi.c:98
jpeg_abort
jpeg_abort(j_common_ptr cinfo)
Definition:
jcomapi.c:29
jpeg_common_struct
Definition:
jpeglib.h:253
DSTATE_START
#define DSTATE_START
Definition:
jpegint.h:29
JHUFF_TBL::sent_table
boolean sent_table
Definition:
jpeglib.h:110
SIZEOF
#define SIZEOF(object)
Definition:
jinclude.h:80
JPOOL_NUMPOOLS
#define JPOOL_NUMPOOLS
Definition:
jpeglib.h:750
jpeg_alloc_quant_table
jpeg_alloc_quant_table(j_common_ptr cinfo)
Definition:
jcomapi.c:86
JQUANT_TBL::sent_table
boolean sent_table
Definition:
jpeglib.h:94
CSTATE_START
#define CSTATE_START
Definition:
jpegint.h:25
JPOOL_PERMANENT
#define JPOOL_PERMANENT
Definition:
jpeglib.h:748
FALSE
#define FALSE
Definition:
OPC_IceHook.h:9
j_decompress_ptr
struct jpeg_decompress_struct * j_decompress_ptr
Definition:
jpeglib.h:263
JQUANT_TBL
Definition:
jpeglib.h:83
openhrp3
Author(s): AIST, General Robotix Inc., Nakamura Lab of Dept. of Mechano Informatics at University of Tokyo
autogenerated on Wed Sep 7 2022 02:51:03