1*dfc6aa5cSAndroid Build Coastguard Worker /*
2*dfc6aa5cSAndroid Build Coastguard Worker * jcomapi.c
3*dfc6aa5cSAndroid Build Coastguard Worker *
4*dfc6aa5cSAndroid Build Coastguard Worker * This file was part of the Independent JPEG Group's software:
5*dfc6aa5cSAndroid Build Coastguard Worker * Copyright (C) 1994-1997, Thomas G. Lane.
6*dfc6aa5cSAndroid Build Coastguard Worker * libjpeg-turbo Modifications:
7*dfc6aa5cSAndroid Build Coastguard Worker * Copyright (C) 2024, D. R. Commander.
8*dfc6aa5cSAndroid Build Coastguard Worker * For conditions of distribution and use, see the accompanying README.ijg
9*dfc6aa5cSAndroid Build Coastguard Worker * file.
10*dfc6aa5cSAndroid Build Coastguard Worker *
11*dfc6aa5cSAndroid Build Coastguard Worker * This file contains application interface routines that are used for both
12*dfc6aa5cSAndroid Build Coastguard Worker * compression and decompression.
13*dfc6aa5cSAndroid Build Coastguard Worker */
14*dfc6aa5cSAndroid Build Coastguard Worker
15*dfc6aa5cSAndroid Build Coastguard Worker #define JPEG_INTERNALS
16*dfc6aa5cSAndroid Build Coastguard Worker #include "jinclude.h"
17*dfc6aa5cSAndroid Build Coastguard Worker #include "jpeglib.h"
18*dfc6aa5cSAndroid Build Coastguard Worker
19*dfc6aa5cSAndroid Build Coastguard Worker
20*dfc6aa5cSAndroid Build Coastguard Worker /*
21*dfc6aa5cSAndroid Build Coastguard Worker * Abort processing of a JPEG compression or decompression operation,
22*dfc6aa5cSAndroid Build Coastguard Worker * but don't destroy the object itself.
23*dfc6aa5cSAndroid Build Coastguard Worker *
24*dfc6aa5cSAndroid Build Coastguard Worker * For this, we merely clean up all the nonpermanent memory pools.
25*dfc6aa5cSAndroid Build Coastguard Worker * Note that temp files (virtual arrays) are not allowed to belong to
26*dfc6aa5cSAndroid Build Coastguard Worker * the permanent pool, so we will be able to close all temp files here.
27*dfc6aa5cSAndroid Build Coastguard Worker * Closing a data source or destination, if necessary, is the application's
28*dfc6aa5cSAndroid Build Coastguard Worker * responsibility.
29*dfc6aa5cSAndroid Build Coastguard Worker */
30*dfc6aa5cSAndroid Build Coastguard Worker
31*dfc6aa5cSAndroid Build Coastguard Worker GLOBAL(void)
jpeg_abort(j_common_ptr cinfo)32*dfc6aa5cSAndroid Build Coastguard Worker jpeg_abort(j_common_ptr cinfo)
33*dfc6aa5cSAndroid Build Coastguard Worker {
34*dfc6aa5cSAndroid Build Coastguard Worker int pool;
35*dfc6aa5cSAndroid Build Coastguard Worker
36*dfc6aa5cSAndroid Build Coastguard Worker /* Do nothing if called on a not-initialized or destroyed JPEG object. */
37*dfc6aa5cSAndroid Build Coastguard Worker if (cinfo->mem == NULL)
38*dfc6aa5cSAndroid Build Coastguard Worker return;
39*dfc6aa5cSAndroid Build Coastguard Worker
40*dfc6aa5cSAndroid Build Coastguard Worker /* Releasing pools in reverse order might help avoid fragmentation
41*dfc6aa5cSAndroid Build Coastguard Worker * with some (brain-damaged) malloc libraries.
42*dfc6aa5cSAndroid Build Coastguard Worker */
43*dfc6aa5cSAndroid Build Coastguard Worker for (pool = JPOOL_NUMPOOLS - 1; pool > JPOOL_PERMANENT; pool--) {
44*dfc6aa5cSAndroid Build Coastguard Worker (*cinfo->mem->free_pool) (cinfo, pool);
45*dfc6aa5cSAndroid Build Coastguard Worker }
46*dfc6aa5cSAndroid Build Coastguard Worker
47*dfc6aa5cSAndroid Build Coastguard Worker /* Reset overall state for possible reuse of object */
48*dfc6aa5cSAndroid Build Coastguard Worker if (cinfo->is_decompressor) {
49*dfc6aa5cSAndroid Build Coastguard Worker cinfo->global_state = DSTATE_START;
50*dfc6aa5cSAndroid Build Coastguard Worker /* Try to keep application from accessing now-deleted marker list.
51*dfc6aa5cSAndroid Build Coastguard Worker * A bit kludgy to do it here, but this is the most central place.
52*dfc6aa5cSAndroid Build Coastguard Worker */
53*dfc6aa5cSAndroid Build Coastguard Worker ((j_decompress_ptr)cinfo)->marker_list = NULL;
54*dfc6aa5cSAndroid Build Coastguard Worker ((j_decompress_ptr)cinfo)->master->marker_list_end = NULL;
55*dfc6aa5cSAndroid Build Coastguard Worker } else {
56*dfc6aa5cSAndroid Build Coastguard Worker cinfo->global_state = CSTATE_START;
57*dfc6aa5cSAndroid Build Coastguard Worker }
58*dfc6aa5cSAndroid Build Coastguard Worker }
59*dfc6aa5cSAndroid Build Coastguard Worker
60*dfc6aa5cSAndroid Build Coastguard Worker
61*dfc6aa5cSAndroid Build Coastguard Worker /*
62*dfc6aa5cSAndroid Build Coastguard Worker * Destruction of a JPEG object.
63*dfc6aa5cSAndroid Build Coastguard Worker *
64*dfc6aa5cSAndroid Build Coastguard Worker * Everything gets deallocated except the master jpeg_compress_struct itself
65*dfc6aa5cSAndroid Build Coastguard Worker * and the error manager struct. Both of these are supplied by the application
66*dfc6aa5cSAndroid Build Coastguard Worker * and must be freed, if necessary, by the application. (Often they are on
67*dfc6aa5cSAndroid Build Coastguard Worker * the stack and so don't need to be freed anyway.)
68*dfc6aa5cSAndroid Build Coastguard Worker * Closing a data source or destination, if necessary, is the application's
69*dfc6aa5cSAndroid Build Coastguard Worker * responsibility.
70*dfc6aa5cSAndroid Build Coastguard Worker */
71*dfc6aa5cSAndroid Build Coastguard Worker
72*dfc6aa5cSAndroid Build Coastguard Worker GLOBAL(void)
jpeg_destroy(j_common_ptr cinfo)73*dfc6aa5cSAndroid Build Coastguard Worker jpeg_destroy(j_common_ptr cinfo)
74*dfc6aa5cSAndroid Build Coastguard Worker {
75*dfc6aa5cSAndroid Build Coastguard Worker /* We need only tell the memory manager to release everything. */
76*dfc6aa5cSAndroid Build Coastguard Worker /* NB: mem pointer is NULL if memory mgr failed to initialize. */
77*dfc6aa5cSAndroid Build Coastguard Worker if (cinfo->mem != NULL)
78*dfc6aa5cSAndroid Build Coastguard Worker (*cinfo->mem->self_destruct) (cinfo);
79*dfc6aa5cSAndroid Build Coastguard Worker cinfo->mem = NULL; /* be safe if jpeg_destroy is called twice */
80*dfc6aa5cSAndroid Build Coastguard Worker cinfo->global_state = 0; /* mark it destroyed */
81*dfc6aa5cSAndroid Build Coastguard Worker }
82*dfc6aa5cSAndroid Build Coastguard Worker
83*dfc6aa5cSAndroid Build Coastguard Worker
84*dfc6aa5cSAndroid Build Coastguard Worker /*
85*dfc6aa5cSAndroid Build Coastguard Worker * Convenience routines for allocating quantization and Huffman tables.
86*dfc6aa5cSAndroid Build Coastguard Worker * (Would jutils.c be a more reasonable place to put these?)
87*dfc6aa5cSAndroid Build Coastguard Worker */
88*dfc6aa5cSAndroid Build Coastguard Worker
89*dfc6aa5cSAndroid Build Coastguard Worker GLOBAL(JQUANT_TBL *)
jpeg_alloc_quant_table(j_common_ptr cinfo)90*dfc6aa5cSAndroid Build Coastguard Worker jpeg_alloc_quant_table(j_common_ptr cinfo)
91*dfc6aa5cSAndroid Build Coastguard Worker {
92*dfc6aa5cSAndroid Build Coastguard Worker JQUANT_TBL *tbl;
93*dfc6aa5cSAndroid Build Coastguard Worker
94*dfc6aa5cSAndroid Build Coastguard Worker tbl = (JQUANT_TBL *)
95*dfc6aa5cSAndroid Build Coastguard Worker (*cinfo->mem->alloc_small) (cinfo, JPOOL_PERMANENT, sizeof(JQUANT_TBL));
96*dfc6aa5cSAndroid Build Coastguard Worker tbl->sent_table = FALSE; /* make sure this is false in any new table */
97*dfc6aa5cSAndroid Build Coastguard Worker return tbl;
98*dfc6aa5cSAndroid Build Coastguard Worker }
99*dfc6aa5cSAndroid Build Coastguard Worker
100*dfc6aa5cSAndroid Build Coastguard Worker
101*dfc6aa5cSAndroid Build Coastguard Worker GLOBAL(JHUFF_TBL *)
jpeg_alloc_huff_table(j_common_ptr cinfo)102*dfc6aa5cSAndroid Build Coastguard Worker jpeg_alloc_huff_table(j_common_ptr cinfo)
103*dfc6aa5cSAndroid Build Coastguard Worker {
104*dfc6aa5cSAndroid Build Coastguard Worker JHUFF_TBL *tbl;
105*dfc6aa5cSAndroid Build Coastguard Worker
106*dfc6aa5cSAndroid Build Coastguard Worker tbl = (JHUFF_TBL *)
107*dfc6aa5cSAndroid Build Coastguard Worker (*cinfo->mem->alloc_small) (cinfo, JPOOL_PERMANENT, sizeof(JHUFF_TBL));
108*dfc6aa5cSAndroid Build Coastguard Worker tbl->sent_table = FALSE; /* make sure this is false in any new table */
109*dfc6aa5cSAndroid Build Coastguard Worker return tbl;
110*dfc6aa5cSAndroid Build Coastguard Worker }
111