Coverage Report

Created: 2026-06-10 07:00

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
328
{
24
328
  int nsymbols, len;
25
26
328
  if (*htblptr == NULL)
27
328
    *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
328
  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
328
  nsymbols = 0;
39
5.57k
  for (len = 1; len <= 16; len++)
40
5.24k
    nsymbols += bits[len];
41
328
  if (nsymbols < 1 || nsymbols > 256)
42
0
    ERREXIT(cinfo, JERR_BAD_HUFF_TABLE);
43
44
328
  memcpy((*htblptr)->huffval, val, nsymbols * sizeof(UINT8));
45
328
  memset(&((*htblptr)->huffval[nsymbols]), 0,
46
328
         (256 - nsymbols) * sizeof(UINT8));
47
48
  /* Initialize sent_table FALSE so table will be written to JPEG file. */
49
328
  (*htblptr)->sent_table = FALSE;
50
328
}
jcparam.c:add_huff_table
Line
Count
Source
23
328
{
24
328
  int nsymbols, len;
25
26
328
  if (*htblptr == NULL)
27
328
    *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
328
  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
328
  nsymbols = 0;
39
5.57k
  for (len = 1; len <= 16; len++)
40
5.24k
    nsymbols += bits[len];
41
328
  if (nsymbols < 1 || nsymbols > 256)
42
0
    ERREXIT(cinfo, JERR_BAD_HUFF_TABLE);
43
44
328
  memcpy((*htblptr)->huffval, val, nsymbols * sizeof(UINT8));
45
328
  memset(&((*htblptr)->huffval[nsymbols]), 0,
46
328
         (256 - nsymbols) * sizeof(UINT8));
47
48
  /* Initialize sent_table FALSE so table will be written to JPEG file. */
49
328
  (*htblptr)->sent_table = FALSE;
50
328
}
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
82
{
58
82
  JHUFF_TBL **dc_huff_tbl_ptrs, **ac_huff_tbl_ptrs;
59
60
82
  static const UINT8 bits_dc_luminance[17] = {
61
82
    /* 0-base */ 0, 0, 1, 5, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0
62
82
  };
63
82
  static const UINT8 val_dc_luminance[] = {
64
82
    0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11
65
82
  };
66
67
82
  static const UINT8 bits_dc_chrominance[17] = {
68
82
    /* 0-base */ 0, 0, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0
69
82
  };
70
82
  static const UINT8 val_dc_chrominance[] = {
71
82
    0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11
72
82
  };
73
74
82
  static const UINT8 bits_ac_luminance[17] = {
75
82
    /* 0-base */ 0, 0, 2, 1, 3, 3, 2, 4, 3, 5, 5, 4, 4, 0, 0, 1, 0x7d
76
82
  };
77
82
  static const UINT8 val_ac_luminance[] = {
78
82
    0x01, 0x02, 0x03, 0x00, 0x04, 0x11, 0x05, 0x12,
79
82
    0x21, 0x31, 0x41, 0x06, 0x13, 0x51, 0x61, 0x07,
80
82
    0x22, 0x71, 0x14, 0x32, 0x81, 0x91, 0xa1, 0x08,
81
82
    0x23, 0x42, 0xb1, 0xc1, 0x15, 0x52, 0xd1, 0xf0,
82
82
    0x24, 0x33, 0x62, 0x72, 0x82, 0x09, 0x0a, 0x16,
83
82
    0x17, 0x18, 0x19, 0x1a, 0x25, 0x26, 0x27, 0x28,
84
82
    0x29, 0x2a, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39,
85
82
    0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49,
86
82
    0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59,
87
82
    0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69,
88
82
    0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79,
89
82
    0x7a, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89,
90
82
    0x8a, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98,
91
82
    0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7,
92
82
    0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6,
93
82
    0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3, 0xc4, 0xc5,
94
82
    0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2, 0xd3, 0xd4,
95
82
    0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda, 0xe1, 0xe2,
96
82
    0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea,
97
82
    0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8,
98
82
    0xf9, 0xfa
99
82
  };
100
101
82
  static const UINT8 bits_ac_chrominance[17] = {
102
82
    /* 0-base */ 0, 0, 2, 1, 2, 4, 4, 3, 4, 7, 5, 4, 4, 0, 1, 2, 0x77
103
82
  };
104
82
  static const UINT8 val_ac_chrominance[] = {
105
82
    0x00, 0x01, 0x02, 0x03, 0x11, 0x04, 0x05, 0x21,
106
82
    0x31, 0x06, 0x12, 0x41, 0x51, 0x07, 0x61, 0x71,
107
82
    0x13, 0x22, 0x32, 0x81, 0x08, 0x14, 0x42, 0x91,
108
82
    0xa1, 0xb1, 0xc1, 0x09, 0x23, 0x33, 0x52, 0xf0,
109
82
    0x15, 0x62, 0x72, 0xd1, 0x0a, 0x16, 0x24, 0x34,
110
82
    0xe1, 0x25, 0xf1, 0x17, 0x18, 0x19, 0x1a, 0x26,
111
82
    0x27, 0x28, 0x29, 0x2a, 0x35, 0x36, 0x37, 0x38,
112
82
    0x39, 0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48,
113
82
    0x49, 0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58,
114
82
    0x59, 0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68,
115
82
    0x69, 0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78,
116
82
    0x79, 0x7a, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
117
82
    0x88, 0x89, 0x8a, 0x92, 0x93, 0x94, 0x95, 0x96,
118
82
    0x97, 0x98, 0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5,
119
82
    0xa6, 0xa7, 0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4,
120
82
    0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3,
121
82
    0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2,
122
82
    0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda,
123
82
    0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9,
124
82
    0xea, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8,
125
82
    0xf9, 0xfa
126
82
  };
127
128
82
  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
82
  } else {
132
82
    dc_huff_tbl_ptrs = ((j_compress_ptr)cinfo)->dc_huff_tbl_ptrs;
133
82
    ac_huff_tbl_ptrs = ((j_compress_ptr)cinfo)->ac_huff_tbl_ptrs;
134
82
  }
135
136
82
  add_huff_table(cinfo, &dc_huff_tbl_ptrs[0], bits_dc_luminance,
137
82
                 val_dc_luminance);
138
82
  add_huff_table(cinfo, &ac_huff_tbl_ptrs[0], bits_ac_luminance,
139
82
                 val_ac_luminance);
140
82
  add_huff_table(cinfo, &dc_huff_tbl_ptrs[1], bits_dc_chrominance,
141
82
                 val_dc_chrominance);
142
82
  add_huff_table(cinfo, &ac_huff_tbl_ptrs[1], bits_ac_chrominance,
143
82
                 val_ac_chrominance);
144
82
}
jcparam.c:std_huff_tables
Line
Count
Source
57
82
{
58
82
  JHUFF_TBL **dc_huff_tbl_ptrs, **ac_huff_tbl_ptrs;
59
60
82
  static const UINT8 bits_dc_luminance[17] = {
61
82
    /* 0-base */ 0, 0, 1, 5, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0
62
82
  };
63
82
  static const UINT8 val_dc_luminance[] = {
64
82
    0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11
65
82
  };
66
67
82
  static const UINT8 bits_dc_chrominance[17] = {
68
82
    /* 0-base */ 0, 0, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0
69
82
  };
70
82
  static const UINT8 val_dc_chrominance[] = {
71
82
    0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11
72
82
  };
73
74
82
  static const UINT8 bits_ac_luminance[17] = {
75
82
    /* 0-base */ 0, 0, 2, 1, 3, 3, 2, 4, 3, 5, 5, 4, 4, 0, 0, 1, 0x7d
76
82
  };
77
82
  static const UINT8 val_ac_luminance[] = {
78
82
    0x01, 0x02, 0x03, 0x00, 0x04, 0x11, 0x05, 0x12,
79
82
    0x21, 0x31, 0x41, 0x06, 0x13, 0x51, 0x61, 0x07,
80
82
    0x22, 0x71, 0x14, 0x32, 0x81, 0x91, 0xa1, 0x08,
81
82
    0x23, 0x42, 0xb1, 0xc1, 0x15, 0x52, 0xd1, 0xf0,
82
82
    0x24, 0x33, 0x62, 0x72, 0x82, 0x09, 0x0a, 0x16,
83
82
    0x17, 0x18, 0x19, 0x1a, 0x25, 0x26, 0x27, 0x28,
84
82
    0x29, 0x2a, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39,
85
82
    0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49,
86
82
    0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59,
87
82
    0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69,
88
82
    0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79,
89
82
    0x7a, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89,
90
82
    0x8a, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98,
91
82
    0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7,
92
82
    0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6,
93
82
    0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3, 0xc4, 0xc5,
94
82
    0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2, 0xd3, 0xd4,
95
82
    0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda, 0xe1, 0xe2,
96
82
    0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea,
97
82
    0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8,
98
82
    0xf9, 0xfa
99
82
  };
100
101
82
  static const UINT8 bits_ac_chrominance[17] = {
102
82
    /* 0-base */ 0, 0, 2, 1, 2, 4, 4, 3, 4, 7, 5, 4, 4, 0, 1, 2, 0x77
103
82
  };
104
82
  static const UINT8 val_ac_chrominance[] = {
105
82
    0x00, 0x01, 0x02, 0x03, 0x11, 0x04, 0x05, 0x21,
106
82
    0x31, 0x06, 0x12, 0x41, 0x51, 0x07, 0x61, 0x71,
107
82
    0x13, 0x22, 0x32, 0x81, 0x08, 0x14, 0x42, 0x91,
108
82
    0xa1, 0xb1, 0xc1, 0x09, 0x23, 0x33, 0x52, 0xf0,
109
82
    0x15, 0x62, 0x72, 0xd1, 0x0a, 0x16, 0x24, 0x34,
110
82
    0xe1, 0x25, 0xf1, 0x17, 0x18, 0x19, 0x1a, 0x26,
111
82
    0x27, 0x28, 0x29, 0x2a, 0x35, 0x36, 0x37, 0x38,
112
82
    0x39, 0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48,
113
82
    0x49, 0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58,
114
82
    0x59, 0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68,
115
82
    0x69, 0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78,
116
82
    0x79, 0x7a, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
117
82
    0x88, 0x89, 0x8a, 0x92, 0x93, 0x94, 0x95, 0x96,
118
82
    0x97, 0x98, 0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5,
119
82
    0xa6, 0xa7, 0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4,
120
82
    0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3,
121
82
    0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2,
122
82
    0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda,
123
82
    0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9,
124
82
    0xea, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8,
125
82
    0xf9, 0xfa
126
82
  };
127
128
82
  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
82
  } else {
132
82
    dc_huff_tbl_ptrs = ((j_compress_ptr)cinfo)->dc_huff_tbl_ptrs;
133
82
    ac_huff_tbl_ptrs = ((j_compress_ptr)cinfo)->ac_huff_tbl_ptrs;
134
82
  }
135
136
82
  add_huff_table(cinfo, &dc_huff_tbl_ptrs[0], bits_dc_luminance,
137
82
                 val_dc_luminance);
138
82
  add_huff_table(cinfo, &ac_huff_tbl_ptrs[0], bits_ac_luminance,
139
82
                 val_ac_luminance);
140
82
  add_huff_table(cinfo, &dc_huff_tbl_ptrs[1], bits_dc_chrominance,
141
82
                 val_dc_chrominance);
142
82
  add_huff_table(cinfo, &ac_huff_tbl_ptrs[1], bits_ac_chrominance,
143
82
                 val_ac_chrominance);
144
82
}
Unexecuted instantiation: jdhuff.c:std_huff_tables