Coverage Report

Created: 2026-05-16 06:41

next uncovered line (L), next uncovered region (R), next uncovered branch (B)
/work/libjpeg-turbo/src/jstdhuff.c
Line
Count
Source
1
/*
2
 * jstdhuff.c
3
 *
4
 * This file was part of the Independent JPEG Group's software:
5
 * Copyright (C) 1991-1998, Thomas G. Lane.
6
 * libjpeg-turbo Modifications:
7
 * Copyright (C) 2013, 2022, 2024, D. R. Commander.
8
 * For conditions of distribution and use, see the accompanying README.ijg
9
 * file.
10
 *
11
 * This file contains routines to set the default Huffman tables, if they are
12
 * not already set.
13
 */
14
15
/*
16
 * Huffman table setup routines
17
 */
18
19
LOCAL(void)
20
add_huff_table(j_common_ptr cinfo, JHUFF_TBL **htblptr, const UINT8 *bits,
21
               const UINT8 *val)
22
/* Define a Huffman table */
23
308
{
24
308
  int nsymbols, len;
25
26
308
  if (*htblptr == NULL)
27
308
    *htblptr = jpeg_alloc_huff_table(cinfo);
28
0
  else if (cinfo->is_decompressor)
29
0
    return;
30
31
  /* Copy the number-of-symbols-of-each-code-length counts */
32
308
  memcpy((*htblptr)->bits, bits, sizeof((*htblptr)->bits));
33
34
  /* Validate the counts.  We do this here mainly so we can copy the right
35
   * number of symbols from the val[] array, without risking marching off
36
   * the end of memory.  jchuff.c will do a more thorough test later.
37
   */
38
308
  nsymbols = 0;
39
5.23k
  for (len = 1; len <= 16; len++)
40
4.92k
    nsymbols += bits[len];
41
308
  if (nsymbols < 1 || nsymbols > 256)
42
0
    ERREXIT(cinfo, JERR_BAD_HUFF_TABLE);
43
44
308
  memcpy((*htblptr)->huffval, val, nsymbols * sizeof(UINT8));
45
308
  memset(&((*htblptr)->huffval[nsymbols]), 0,
46
308
         (256 - nsymbols) * sizeof(UINT8));
47
48
  /* Initialize sent_table FALSE so table will be written to JPEG file. */
49
308
  (*htblptr)->sent_table = FALSE;
50
308
}
jcparam.c:add_huff_table
Line
Count
Source
23
308
{
24
308
  int nsymbols, len;
25
26
308
  if (*htblptr == NULL)
27
308
    *htblptr = jpeg_alloc_huff_table(cinfo);
28
0
  else if (cinfo->is_decompressor)
29
0
    return;
30
31
  /* Copy the number-of-symbols-of-each-code-length counts */
32
308
  memcpy((*htblptr)->bits, bits, sizeof((*htblptr)->bits));
33
34
  /* Validate the counts.  We do this here mainly so we can copy the right
35
   * number of symbols from the val[] array, without risking marching off
36
   * the end of memory.  jchuff.c will do a more thorough test later.
37
   */
38
308
  nsymbols = 0;
39
5.23k
  for (len = 1; len <= 16; len++)
40
4.92k
    nsymbols += bits[len];
41
308
  if (nsymbols < 1 || nsymbols > 256)
42
0
    ERREXIT(cinfo, JERR_BAD_HUFF_TABLE);
43
44
308
  memcpy((*htblptr)->huffval, val, nsymbols * sizeof(UINT8));
45
308
  memset(&((*htblptr)->huffval[nsymbols]), 0,
46
308
         (256 - nsymbols) * sizeof(UINT8));
47
48
  /* Initialize sent_table FALSE so table will be written to JPEG file. */
49
308
  (*htblptr)->sent_table = FALSE;
50
308
}
Unexecuted instantiation: jdhuff.c:add_huff_table
51
52
53
LOCAL(void)
54
std_huff_tables(j_common_ptr cinfo)
55
/* Set up the standard Huffman tables (cf. JPEG standard section K.3) */
56
/* IMPORTANT: these are only valid for 8-bit data precision! */
57
77
{
58
77
  JHUFF_TBL **dc_huff_tbl_ptrs, **ac_huff_tbl_ptrs;
59
60
77
  static const UINT8 bits_dc_luminance[17] = {
61
77
    /* 0-base */ 0, 0, 1, 5, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0
62
77
  };
63
77
  static const UINT8 val_dc_luminance[] = {
64
77
    0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11
65
77
  };
66
67
77
  static const UINT8 bits_dc_chrominance[17] = {
68
77
    /* 0-base */ 0, 0, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0
69
77
  };
70
77
  static const UINT8 val_dc_chrominance[] = {
71
77
    0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11
72
77
  };
73
74
77
  static const UINT8 bits_ac_luminance[17] = {
75
77
    /* 0-base */ 0, 0, 2, 1, 3, 3, 2, 4, 3, 5, 5, 4, 4, 0, 0, 1, 0x7d
76
77
  };
77
77
  static const UINT8 val_ac_luminance[] = {
78
77
    0x01, 0x02, 0x03, 0x00, 0x04, 0x11, 0x05, 0x12,
79
77
    0x21, 0x31, 0x41, 0x06, 0x13, 0x51, 0x61, 0x07,
80
77
    0x22, 0x71, 0x14, 0x32, 0x81, 0x91, 0xa1, 0x08,
81
77
    0x23, 0x42, 0xb1, 0xc1, 0x15, 0x52, 0xd1, 0xf0,
82
77
    0x24, 0x33, 0x62, 0x72, 0x82, 0x09, 0x0a, 0x16,
83
77
    0x17, 0x18, 0x19, 0x1a, 0x25, 0x26, 0x27, 0x28,
84
77
    0x29, 0x2a, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39,
85
77
    0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49,
86
77
    0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59,
87
77
    0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69,
88
77
    0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79,
89
77
    0x7a, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89,
90
77
    0x8a, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98,
91
77
    0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7,
92
77
    0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6,
93
77
    0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3, 0xc4, 0xc5,
94
77
    0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2, 0xd3, 0xd4,
95
77
    0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda, 0xe1, 0xe2,
96
77
    0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea,
97
77
    0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8,
98
77
    0xf9, 0xfa
99
77
  };
100
101
77
  static const UINT8 bits_ac_chrominance[17] = {
102
77
    /* 0-base */ 0, 0, 2, 1, 2, 4, 4, 3, 4, 7, 5, 4, 4, 0, 1, 2, 0x77
103
77
  };
104
77
  static const UINT8 val_ac_chrominance[] = {
105
77
    0x00, 0x01, 0x02, 0x03, 0x11, 0x04, 0x05, 0x21,
106
77
    0x31, 0x06, 0x12, 0x41, 0x51, 0x07, 0x61, 0x71,
107
77
    0x13, 0x22, 0x32, 0x81, 0x08, 0x14, 0x42, 0x91,
108
77
    0xa1, 0xb1, 0xc1, 0x09, 0x23, 0x33, 0x52, 0xf0,
109
77
    0x15, 0x62, 0x72, 0xd1, 0x0a, 0x16, 0x24, 0x34,
110
77
    0xe1, 0x25, 0xf1, 0x17, 0x18, 0x19, 0x1a, 0x26,
111
77
    0x27, 0x28, 0x29, 0x2a, 0x35, 0x36, 0x37, 0x38,
112
77
    0x39, 0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48,
113
77
    0x49, 0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58,
114
77
    0x59, 0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68,
115
77
    0x69, 0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78,
116
77
    0x79, 0x7a, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
117
77
    0x88, 0x89, 0x8a, 0x92, 0x93, 0x94, 0x95, 0x96,
118
77
    0x97, 0x98, 0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5,
119
77
    0xa6, 0xa7, 0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4,
120
77
    0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3,
121
77
    0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2,
122
77
    0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda,
123
77
    0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9,
124
77
    0xea, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8,
125
77
    0xf9, 0xfa
126
77
  };
127
128
77
  if (cinfo->is_decompressor) {
129
0
    dc_huff_tbl_ptrs = ((j_decompress_ptr)cinfo)->dc_huff_tbl_ptrs;
130
0
    ac_huff_tbl_ptrs = ((j_decompress_ptr)cinfo)->ac_huff_tbl_ptrs;
131
77
  } else {
132
77
    dc_huff_tbl_ptrs = ((j_compress_ptr)cinfo)->dc_huff_tbl_ptrs;
133
77
    ac_huff_tbl_ptrs = ((j_compress_ptr)cinfo)->ac_huff_tbl_ptrs;
134
77
  }
135
136
77
  add_huff_table(cinfo, &dc_huff_tbl_ptrs[0], bits_dc_luminance,
137
77
                 val_dc_luminance);
138
77
  add_huff_table(cinfo, &ac_huff_tbl_ptrs[0], bits_ac_luminance,
139
77
                 val_ac_luminance);
140
77
  add_huff_table(cinfo, &dc_huff_tbl_ptrs[1], bits_dc_chrominance,
141
77
                 val_dc_chrominance);
142
77
  add_huff_table(cinfo, &ac_huff_tbl_ptrs[1], bits_ac_chrominance,
143
77
                 val_ac_chrominance);
144
77
}
jcparam.c:std_huff_tables
Line
Count
Source
57
77
{
58
77
  JHUFF_TBL **dc_huff_tbl_ptrs, **ac_huff_tbl_ptrs;
59
60
77
  static const UINT8 bits_dc_luminance[17] = {
61
77
    /* 0-base */ 0, 0, 1, 5, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0
62
77
  };
63
77
  static const UINT8 val_dc_luminance[] = {
64
77
    0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11
65
77
  };
66
67
77
  static const UINT8 bits_dc_chrominance[17] = {
68
77
    /* 0-base */ 0, 0, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0
69
77
  };
70
77
  static const UINT8 val_dc_chrominance[] = {
71
77
    0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11
72
77
  };
73
74
77
  static const UINT8 bits_ac_luminance[17] = {
75
77
    /* 0-base */ 0, 0, 2, 1, 3, 3, 2, 4, 3, 5, 5, 4, 4, 0, 0, 1, 0x7d
76
77
  };
77
77
  static const UINT8 val_ac_luminance[] = {
78
77
    0x01, 0x02, 0x03, 0x00, 0x04, 0x11, 0x05, 0x12,
79
77
    0x21, 0x31, 0x41, 0x06, 0x13, 0x51, 0x61, 0x07,
80
77
    0x22, 0x71, 0x14, 0x32, 0x81, 0x91, 0xa1, 0x08,
81
77
    0x23, 0x42, 0xb1, 0xc1, 0x15, 0x52, 0xd1, 0xf0,
82
77
    0x24, 0x33, 0x62, 0x72, 0x82, 0x09, 0x0a, 0x16,
83
77
    0x17, 0x18, 0x19, 0x1a, 0x25, 0x26, 0x27, 0x28,
84
77
    0x29, 0x2a, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39,
85
77
    0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49,
86
77
    0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59,
87
77
    0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69,
88
77
    0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79,
89
77
    0x7a, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89,
90
77
    0x8a, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98,
91
77
    0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7,
92
77
    0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6,
93
77
    0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3, 0xc4, 0xc5,
94
77
    0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2, 0xd3, 0xd4,
95
77
    0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda, 0xe1, 0xe2,
96
77
    0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea,
97
77
    0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8,
98
77
    0xf9, 0xfa
99
77
  };
100
101
77
  static const UINT8 bits_ac_chrominance[17] = {
102
77
    /* 0-base */ 0, 0, 2, 1, 2, 4, 4, 3, 4, 7, 5, 4, 4, 0, 1, 2, 0x77
103
77
  };
104
77
  static const UINT8 val_ac_chrominance[] = {
105
77
    0x00, 0x01, 0x02, 0x03, 0x11, 0x04, 0x05, 0x21,
106
77
    0x31, 0x06, 0x12, 0x41, 0x51, 0x07, 0x61, 0x71,
107
77
    0x13, 0x22, 0x32, 0x81, 0x08, 0x14, 0x42, 0x91,
108
77
    0xa1, 0xb1, 0xc1, 0x09, 0x23, 0x33, 0x52, 0xf0,
109
77
    0x15, 0x62, 0x72, 0xd1, 0x0a, 0x16, 0x24, 0x34,
110
77
    0xe1, 0x25, 0xf1, 0x17, 0x18, 0x19, 0x1a, 0x26,
111
77
    0x27, 0x28, 0x29, 0x2a, 0x35, 0x36, 0x37, 0x38,
112
77
    0x39, 0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48,
113
77
    0x49, 0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58,
114
77
    0x59, 0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68,
115
77
    0x69, 0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78,
116
77
    0x79, 0x7a, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
117
77
    0x88, 0x89, 0x8a, 0x92, 0x93, 0x94, 0x95, 0x96,
118
77
    0x97, 0x98, 0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5,
119
77
    0xa6, 0xa7, 0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4,
120
77
    0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3,
121
77
    0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2,
122
77
    0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda,
123
77
    0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9,
124
77
    0xea, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8,
125
77
    0xf9, 0xfa
126
77
  };
127
128
77
  if (cinfo->is_decompressor) {
129
0
    dc_huff_tbl_ptrs = ((j_decompress_ptr)cinfo)->dc_huff_tbl_ptrs;
130
0
    ac_huff_tbl_ptrs = ((j_decompress_ptr)cinfo)->ac_huff_tbl_ptrs;
131
77
  } else {
132
77
    dc_huff_tbl_ptrs = ((j_compress_ptr)cinfo)->dc_huff_tbl_ptrs;
133
77
    ac_huff_tbl_ptrs = ((j_compress_ptr)cinfo)->ac_huff_tbl_ptrs;
134
77
  }
135
136
77
  add_huff_table(cinfo, &dc_huff_tbl_ptrs[0], bits_dc_luminance,
137
77
                 val_dc_luminance);
138
77
  add_huff_table(cinfo, &ac_huff_tbl_ptrs[0], bits_ac_luminance,
139
77
                 val_ac_luminance);
140
77
  add_huff_table(cinfo, &dc_huff_tbl_ptrs[1], bits_dc_chrominance,
141
77
                 val_dc_chrominance);
142
77
  add_huff_table(cinfo, &ac_huff_tbl_ptrs[1], bits_ac_chrominance,
143
77
                 val_ac_chrominance);
144
77
}
Unexecuted instantiation: jdhuff.c:std_huff_tables