/src/ghostpdl/obj/jcomapi.c
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1 | | /* |
2 | | * jcomapi.c |
3 | | * |
4 | | * Copyright (C) 1994-1997, Thomas G. Lane. |
5 | | * Modified 2019 by Guido Vollbeding. |
6 | | * This file is part of the Independent JPEG Group's software. |
7 | | * For conditions of distribution and use, see the accompanying README file. |
8 | | * |
9 | | * This file contains application interface routines that are used for both |
10 | | * compression and decompression. |
11 | | */ |
12 | | |
13 | | #define JPEG_INTERNALS |
14 | | #include "jinclude.h" |
15 | | #include "jpeglib.h" |
16 | | |
17 | | |
18 | | /* |
19 | | * Abort processing of a JPEG compression or decompression operation, |
20 | | * but don't destroy the object itself. |
21 | | * |
22 | | * For this, we merely clean up all the nonpermanent memory pools. |
23 | | * Note that temp files (virtual arrays) are not allowed to belong to |
24 | | * the permanent pool, so we will be able to close all temp files here. |
25 | | * Closing a data source or destination, if necessary, is the application's |
26 | | * responsibility. |
27 | | */ |
28 | | |
29 | | GLOBAL(void) |
30 | | jpeg_abort (j_common_ptr cinfo) |
31 | 392 | { |
32 | 392 | int pool; |
33 | | |
34 | | /* Do nothing if called on a not-initialized or destroyed JPEG object. */ |
35 | 392 | if (cinfo->mem == NULL) |
36 | 0 | return; |
37 | | |
38 | | /* Releasing pools in reverse order might help avoid fragmentation |
39 | | * with some (brain-damaged) malloc libraries. |
40 | | */ |
41 | 784 | for (pool = JPOOL_NUMPOOLS-1; pool > JPOOL_PERMANENT; pool--) { |
42 | 392 | (*cinfo->mem->free_pool) (cinfo, pool); |
43 | 392 | } |
44 | | |
45 | | /* Reset overall state for possible reuse of object */ |
46 | 392 | if (cinfo->is_decompressor) { |
47 | 392 | cinfo->global_state = DSTATE_START; |
48 | | /* Try to keep application from accessing now-deleted marker list. |
49 | | * A bit kludgy to do it here, but this is the most central place. |
50 | | */ |
51 | 392 | ((j_decompress_ptr) cinfo)->marker_list = NULL; |
52 | 392 | } else { |
53 | 0 | cinfo->global_state = CSTATE_START; |
54 | 0 | } |
55 | 392 | } |
56 | | |
57 | | |
58 | | /* |
59 | | * Destruction of a JPEG object. |
60 | | * |
61 | | * Everything gets deallocated except the master jpeg_compress_struct itself |
62 | | * and the error manager struct. Both of these are supplied by the application |
63 | | * and must be freed, if necessary, by the application. (Often they are on |
64 | | * the stack and so don't need to be freed anyway.) |
65 | | * Closing a data source or destination, if necessary, is the application's |
66 | | * responsibility. |
67 | | */ |
68 | | |
69 | | GLOBAL(void) |
70 | | jpeg_destroy (j_common_ptr cinfo) |
71 | 538 | { |
72 | | /* We need only tell the memory manager to release everything. */ |
73 | | /* NB: mem pointer is NULL if memory mgr failed to initialize. */ |
74 | 538 | if (cinfo->mem != NULL) |
75 | 538 | (*cinfo->mem->self_destruct) (cinfo); |
76 | 538 | cinfo->mem = NULL; /* be safe if jpeg_destroy is called twice */ |
77 | 538 | cinfo->global_state = 0; /* mark it destroyed */ |
78 | 538 | } |
79 | | |
80 | | |
81 | | /* |
82 | | * Convenience routines for allocating quantization and Huffman tables. |
83 | | * (Would jutils.c be a more reasonable place to put these?) |
84 | | */ |
85 | | |
86 | | GLOBAL(JQUANT_TBL *) |
87 | | jpeg_alloc_quant_table (j_common_ptr cinfo) |
88 | 911 | { |
89 | 911 | JQUANT_TBL *tbl; |
90 | | |
91 | 911 | tbl = (JQUANT_TBL *) |
92 | 911 | (*cinfo->mem->alloc_small) (cinfo, JPOOL_PERMANENT, SIZEOF(JQUANT_TBL)); |
93 | 911 | tbl->sent_table = FALSE; /* make sure this is false in any new table */ |
94 | 911 | return tbl; |
95 | 911 | } |
96 | | |
97 | | |
98 | | GLOBAL(JHUFF_TBL *) |
99 | | jpeg_alloc_huff_table (j_common_ptr cinfo) |
100 | 1.69k | { |
101 | 1.69k | JHUFF_TBL *tbl; |
102 | | |
103 | 1.69k | tbl = (JHUFF_TBL *) |
104 | 1.69k | (*cinfo->mem->alloc_small) (cinfo, JPOOL_PERMANENT, SIZEOF(JHUFF_TBL)); |
105 | 1.69k | tbl->sent_table = FALSE; /* make sure this is false in any new table */ |
106 | 1.69k | return tbl; |
107 | 1.69k | } |
108 | | |
109 | | |
110 | | /* |
111 | | * Set up the standard Huffman tables (cf. JPEG standard section K.3). |
112 | | * IMPORTANT: these are only valid for 8-bit data precision! |
113 | | * (Would jutils.c be a more reasonable place to put this?) |
114 | | */ |
115 | | |
116 | | GLOBAL(JHUFF_TBL *) |
117 | | jpeg_std_huff_table (j_common_ptr cinfo, boolean isDC, int tblno) |
118 | 16 | { |
119 | 16 | JHUFF_TBL **htblptr, *htbl; |
120 | 16 | const UINT8 *bits, *val; |
121 | 16 | int nsymbols, len; |
122 | | |
123 | 16 | static const UINT8 bits_dc_luminance[17] = |
124 | 16 | { /* 0-base */ 0, 0, 1, 5, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0 }; |
125 | 16 | static const UINT8 val_dc_luminance[] = |
126 | 16 | { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 }; |
127 | | |
128 | 16 | static const UINT8 bits_dc_chrominance[17] = |
129 | 16 | { /* 0-base */ 0, 0, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0 }; |
130 | 16 | static const UINT8 val_dc_chrominance[] = |
131 | 16 | { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 }; |
132 | | |
133 | 16 | static const UINT8 bits_ac_luminance[17] = |
134 | 16 | { /* 0-base */ 0, 0, 2, 1, 3, 3, 2, 4, 3, 5, 5, 4, 4, 0, 0, 1, 0x7d }; |
135 | 16 | static const UINT8 val_ac_luminance[] = |
136 | 16 | { 0x01, 0x02, 0x03, 0x00, 0x04, 0x11, 0x05, 0x12, |
137 | 16 | 0x21, 0x31, 0x41, 0x06, 0x13, 0x51, 0x61, 0x07, |
138 | 16 | 0x22, 0x71, 0x14, 0x32, 0x81, 0x91, 0xa1, 0x08, |
139 | 16 | 0x23, 0x42, 0xb1, 0xc1, 0x15, 0x52, 0xd1, 0xf0, |
140 | 16 | 0x24, 0x33, 0x62, 0x72, 0x82, 0x09, 0x0a, 0x16, |
141 | 16 | 0x17, 0x18, 0x19, 0x1a, 0x25, 0x26, 0x27, 0x28, |
142 | 16 | 0x29, 0x2a, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, |
143 | 16 | 0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, |
144 | 16 | 0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, |
145 | 16 | 0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, |
146 | 16 | 0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, |
147 | 16 | 0x7a, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, |
148 | 16 | 0x8a, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, |
149 | 16 | 0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, |
150 | 16 | 0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, |
151 | 16 | 0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3, 0xc4, 0xc5, |
152 | 16 | 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2, 0xd3, 0xd4, |
153 | 16 | 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda, 0xe1, 0xe2, |
154 | 16 | 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea, |
155 | 16 | 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8, |
156 | 16 | 0xf9, 0xfa }; |
157 | | |
158 | 16 | static const UINT8 bits_ac_chrominance[17] = |
159 | 16 | { /* 0-base */ 0, 0, 2, 1, 2, 4, 4, 3, 4, 7, 5, 4, 4, 0, 1, 2, 0x77 }; |
160 | 16 | static const UINT8 val_ac_chrominance[] = |
161 | 16 | { 0x00, 0x01, 0x02, 0x03, 0x11, 0x04, 0x05, 0x21, |
162 | 16 | 0x31, 0x06, 0x12, 0x41, 0x51, 0x07, 0x61, 0x71, |
163 | 16 | 0x13, 0x22, 0x32, 0x81, 0x08, 0x14, 0x42, 0x91, |
164 | 16 | 0xa1, 0xb1, 0xc1, 0x09, 0x23, 0x33, 0x52, 0xf0, |
165 | 16 | 0x15, 0x62, 0x72, 0xd1, 0x0a, 0x16, 0x24, 0x34, |
166 | 16 | 0xe1, 0x25, 0xf1, 0x17, 0x18, 0x19, 0x1a, 0x26, |
167 | 16 | 0x27, 0x28, 0x29, 0x2a, 0x35, 0x36, 0x37, 0x38, |
168 | 16 | 0x39, 0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, |
169 | 16 | 0x49, 0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, |
170 | 16 | 0x59, 0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, |
171 | 16 | 0x69, 0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, |
172 | 16 | 0x79, 0x7a, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, |
173 | 16 | 0x88, 0x89, 0x8a, 0x92, 0x93, 0x94, 0x95, 0x96, |
174 | 16 | 0x97, 0x98, 0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5, |
175 | 16 | 0xa6, 0xa7, 0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4, |
176 | 16 | 0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3, |
177 | 16 | 0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2, |
178 | 16 | 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda, |
179 | 16 | 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, |
180 | 16 | 0xea, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8, |
181 | 16 | 0xf9, 0xfa }; |
182 | | |
183 | 16 | if (cinfo->is_decompressor) { |
184 | 16 | if (isDC) |
185 | 8 | htblptr = ((j_decompress_ptr) cinfo)->dc_huff_tbl_ptrs; |
186 | 8 | else |
187 | 8 | htblptr = ((j_decompress_ptr) cinfo)->ac_huff_tbl_ptrs; |
188 | 16 | } else { |
189 | 0 | if (isDC) |
190 | 0 | htblptr = ((j_compress_ptr) cinfo)->dc_huff_tbl_ptrs; |
191 | 0 | else |
192 | 0 | htblptr = ((j_compress_ptr) cinfo)->ac_huff_tbl_ptrs; |
193 | 0 | } |
194 | | |
195 | 16 | switch (tblno) { |
196 | 0 | case 0: |
197 | 0 | if (isDC) { |
198 | 0 | bits = bits_dc_luminance; |
199 | 0 | val = val_dc_luminance; |
200 | 0 | } else { |
201 | 0 | bits = bits_ac_luminance; |
202 | 0 | val = val_ac_luminance; |
203 | 0 | } |
204 | 0 | break; |
205 | 16 | case 1: |
206 | 16 | if (isDC) { |
207 | 8 | bits = bits_dc_chrominance; |
208 | 8 | val = val_dc_chrominance; |
209 | 8 | } else { |
210 | 8 | bits = bits_ac_chrominance; |
211 | 8 | val = val_ac_chrominance; |
212 | 8 | } |
213 | 16 | break; |
214 | 0 | default: |
215 | 0 | ERREXIT1(cinfo, JERR_NO_HUFF_TABLE, tblno); |
216 | 0 | return NULL; /* avoid compiler warnings for uninitialized variables */ |
217 | 16 | } |
218 | | |
219 | 16 | if (htblptr[tblno] == NULL) |
220 | 16 | htblptr[tblno] = jpeg_alloc_huff_table(cinfo); |
221 | | |
222 | 16 | htbl = htblptr[tblno]; |
223 | | |
224 | | /* Copy the number-of-symbols-of-each-code-length counts */ |
225 | 16 | MEMCOPY(htbl->bits, bits, SIZEOF(htbl->bits)); |
226 | | |
227 | | /* Validate the counts. We do this here mainly so we can copy the right |
228 | | * number of symbols from the val[] array, without risking marching off |
229 | | * the end of memory. jxhuff.c will do a more thorough test later. |
230 | | */ |
231 | 16 | nsymbols = 0; |
232 | 272 | for (len = 1; len <= 16; len++) |
233 | 256 | nsymbols += bits[len]; |
234 | 16 | if (nsymbols > 256) |
235 | 0 | ERREXIT(cinfo, JERR_BAD_HUFF_TABLE); |
236 | | |
237 | 16 | if (nsymbols > 0) |
238 | 16 | MEMCOPY(htbl->huffval, val, nsymbols * SIZEOF(UINT8)); |
239 | | |
240 | | /* Initialize sent_table FALSE so table will be written to JPEG file. */ |
241 | 16 | htbl->sent_table = FALSE; |
242 | | |
243 | 16 | return htbl; |
244 | 16 | } |