Coverage Report

Created: 2026-06-15 06:24

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
340
{
24
340
  int nsymbols, len;
25
26
340
  if (*htblptr == NULL)
27
340
    *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
340
  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
340
  nsymbols = 0;
39
5.78k
  for (len = 1; len <= 16; len++)
40
5.44k
    nsymbols += bits[len];
41
340
  if (nsymbols < 1 || nsymbols > 256)
42
0
    ERREXIT(cinfo, JERR_BAD_HUFF_TABLE);
43
44
340
  memcpy((*htblptr)->huffval, val, nsymbols * sizeof(UINT8));
45
340
  memset(&((*htblptr)->huffval[nsymbols]), 0,
46
340
         (256 - nsymbols) * sizeof(UINT8));
47
48
  /* Initialize sent_table FALSE so table will be written to JPEG file. */
49
340
  (*htblptr)->sent_table = FALSE;
50
340
}
jcparam.c:add_huff_table
Line
Count
Source
23
340
{
24
340
  int nsymbols, len;
25
26
340
  if (*htblptr == NULL)
27
340
    *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
340
  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
340
  nsymbols = 0;
39
5.78k
  for (len = 1; len <= 16; len++)
40
5.44k
    nsymbols += bits[len];
41
340
  if (nsymbols < 1 || nsymbols > 256)
42
0
    ERREXIT(cinfo, JERR_BAD_HUFF_TABLE);
43
44
340
  memcpy((*htblptr)->huffval, val, nsymbols * sizeof(UINT8));
45
340
  memset(&((*htblptr)->huffval[nsymbols]), 0,
46
340
         (256 - nsymbols) * sizeof(UINT8));
47
48
  /* Initialize sent_table FALSE so table will be written to JPEG file. */
49
340
  (*htblptr)->sent_table = FALSE;
50
340
}
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
85
{
58
85
  JHUFF_TBL **dc_huff_tbl_ptrs, **ac_huff_tbl_ptrs;
59
60
85
  static const UINT8 bits_dc_luminance[17] = {
61
85
    /* 0-base */ 0, 0, 1, 5, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0
62
85
  };
63
85
  static const UINT8 val_dc_luminance[] = {
64
85
    0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11
65
85
  };
66
67
85
  static const UINT8 bits_dc_chrominance[17] = {
68
85
    /* 0-base */ 0, 0, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0
69
85
  };
70
85
  static const UINT8 val_dc_chrominance[] = {
71
85
    0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11
72
85
  };
73
74
85
  static const UINT8 bits_ac_luminance[17] = {
75
85
    /* 0-base */ 0, 0, 2, 1, 3, 3, 2, 4, 3, 5, 5, 4, 4, 0, 0, 1, 0x7d
76
85
  };
77
85
  static const UINT8 val_ac_luminance[] = {
78
85
    0x01, 0x02, 0x03, 0x00, 0x04, 0x11, 0x05, 0x12,
79
85
    0x21, 0x31, 0x41, 0x06, 0x13, 0x51, 0x61, 0x07,
80
85
    0x22, 0x71, 0x14, 0x32, 0x81, 0x91, 0xa1, 0x08,
81
85
    0x23, 0x42, 0xb1, 0xc1, 0x15, 0x52, 0xd1, 0xf0,
82
85
    0x24, 0x33, 0x62, 0x72, 0x82, 0x09, 0x0a, 0x16,
83
85
    0x17, 0x18, 0x19, 0x1a, 0x25, 0x26, 0x27, 0x28,
84
85
    0x29, 0x2a, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39,
85
85
    0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49,
86
85
    0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59,
87
85
    0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69,
88
85
    0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79,
89
85
    0x7a, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89,
90
85
    0x8a, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98,
91
85
    0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7,
92
85
    0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6,
93
85
    0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3, 0xc4, 0xc5,
94
85
    0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2, 0xd3, 0xd4,
95
85
    0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda, 0xe1, 0xe2,
96
85
    0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea,
97
85
    0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8,
98
85
    0xf9, 0xfa
99
85
  };
100
101
85
  static const UINT8 bits_ac_chrominance[17] = {
102
85
    /* 0-base */ 0, 0, 2, 1, 2, 4, 4, 3, 4, 7, 5, 4, 4, 0, 1, 2, 0x77
103
85
  };
104
85
  static const UINT8 val_ac_chrominance[] = {
105
85
    0x00, 0x01, 0x02, 0x03, 0x11, 0x04, 0x05, 0x21,
106
85
    0x31, 0x06, 0x12, 0x41, 0x51, 0x07, 0x61, 0x71,
107
85
    0x13, 0x22, 0x32, 0x81, 0x08, 0x14, 0x42, 0x91,
108
85
    0xa1, 0xb1, 0xc1, 0x09, 0x23, 0x33, 0x52, 0xf0,
109
85
    0x15, 0x62, 0x72, 0xd1, 0x0a, 0x16, 0x24, 0x34,
110
85
    0xe1, 0x25, 0xf1, 0x17, 0x18, 0x19, 0x1a, 0x26,
111
85
    0x27, 0x28, 0x29, 0x2a, 0x35, 0x36, 0x37, 0x38,
112
85
    0x39, 0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48,
113
85
    0x49, 0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58,
114
85
    0x59, 0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68,
115
85
    0x69, 0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78,
116
85
    0x79, 0x7a, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
117
85
    0x88, 0x89, 0x8a, 0x92, 0x93, 0x94, 0x95, 0x96,
118
85
    0x97, 0x98, 0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5,
119
85
    0xa6, 0xa7, 0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4,
120
85
    0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3,
121
85
    0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2,
122
85
    0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda,
123
85
    0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9,
124
85
    0xea, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8,
125
85
    0xf9, 0xfa
126
85
  };
127
128
85
  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
85
  } else {
132
85
    dc_huff_tbl_ptrs = ((j_compress_ptr)cinfo)->dc_huff_tbl_ptrs;
133
85
    ac_huff_tbl_ptrs = ((j_compress_ptr)cinfo)->ac_huff_tbl_ptrs;
134
85
  }
135
136
85
  add_huff_table(cinfo, &dc_huff_tbl_ptrs[0], bits_dc_luminance,
137
85
                 val_dc_luminance);
138
85
  add_huff_table(cinfo, &ac_huff_tbl_ptrs[0], bits_ac_luminance,
139
85
                 val_ac_luminance);
140
85
  add_huff_table(cinfo, &dc_huff_tbl_ptrs[1], bits_dc_chrominance,
141
85
                 val_dc_chrominance);
142
85
  add_huff_table(cinfo, &ac_huff_tbl_ptrs[1], bits_ac_chrominance,
143
85
                 val_ac_chrominance);
144
85
}
jcparam.c:std_huff_tables
Line
Count
Source
57
85
{
58
85
  JHUFF_TBL **dc_huff_tbl_ptrs, **ac_huff_tbl_ptrs;
59
60
85
  static const UINT8 bits_dc_luminance[17] = {
61
85
    /* 0-base */ 0, 0, 1, 5, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0
62
85
  };
63
85
  static const UINT8 val_dc_luminance[] = {
64
85
    0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11
65
85
  };
66
67
85
  static const UINT8 bits_dc_chrominance[17] = {
68
85
    /* 0-base */ 0, 0, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0
69
85
  };
70
85
  static const UINT8 val_dc_chrominance[] = {
71
85
    0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11
72
85
  };
73
74
85
  static const UINT8 bits_ac_luminance[17] = {
75
85
    /* 0-base */ 0, 0, 2, 1, 3, 3, 2, 4, 3, 5, 5, 4, 4, 0, 0, 1, 0x7d
76
85
  };
77
85
  static const UINT8 val_ac_luminance[] = {
78
85
    0x01, 0x02, 0x03, 0x00, 0x04, 0x11, 0x05, 0x12,
79
85
    0x21, 0x31, 0x41, 0x06, 0x13, 0x51, 0x61, 0x07,
80
85
    0x22, 0x71, 0x14, 0x32, 0x81, 0x91, 0xa1, 0x08,
81
85
    0x23, 0x42, 0xb1, 0xc1, 0x15, 0x52, 0xd1, 0xf0,
82
85
    0x24, 0x33, 0x62, 0x72, 0x82, 0x09, 0x0a, 0x16,
83
85
    0x17, 0x18, 0x19, 0x1a, 0x25, 0x26, 0x27, 0x28,
84
85
    0x29, 0x2a, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39,
85
85
    0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49,
86
85
    0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59,
87
85
    0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69,
88
85
    0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79,
89
85
    0x7a, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89,
90
85
    0x8a, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98,
91
85
    0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7,
92
85
    0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6,
93
85
    0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3, 0xc4, 0xc5,
94
85
    0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2, 0xd3, 0xd4,
95
85
    0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda, 0xe1, 0xe2,
96
85
    0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea,
97
85
    0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8,
98
85
    0xf9, 0xfa
99
85
  };
100
101
85
  static const UINT8 bits_ac_chrominance[17] = {
102
85
    /* 0-base */ 0, 0, 2, 1, 2, 4, 4, 3, 4, 7, 5, 4, 4, 0, 1, 2, 0x77
103
85
  };
104
85
  static const UINT8 val_ac_chrominance[] = {
105
85
    0x00, 0x01, 0x02, 0x03, 0x11, 0x04, 0x05, 0x21,
106
85
    0x31, 0x06, 0x12, 0x41, 0x51, 0x07, 0x61, 0x71,
107
85
    0x13, 0x22, 0x32, 0x81, 0x08, 0x14, 0x42, 0x91,
108
85
    0xa1, 0xb1, 0xc1, 0x09, 0x23, 0x33, 0x52, 0xf0,
109
85
    0x15, 0x62, 0x72, 0xd1, 0x0a, 0x16, 0x24, 0x34,
110
85
    0xe1, 0x25, 0xf1, 0x17, 0x18, 0x19, 0x1a, 0x26,
111
85
    0x27, 0x28, 0x29, 0x2a, 0x35, 0x36, 0x37, 0x38,
112
85
    0x39, 0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48,
113
85
    0x49, 0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58,
114
85
    0x59, 0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68,
115
85
    0x69, 0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78,
116
85
    0x79, 0x7a, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
117
85
    0x88, 0x89, 0x8a, 0x92, 0x93, 0x94, 0x95, 0x96,
118
85
    0x97, 0x98, 0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5,
119
85
    0xa6, 0xa7, 0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4,
120
85
    0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3,
121
85
    0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2,
122
85
    0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda,
123
85
    0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9,
124
85
    0xea, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8,
125
85
    0xf9, 0xfa
126
85
  };
127
128
85
  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
85
  } else {
132
85
    dc_huff_tbl_ptrs = ((j_compress_ptr)cinfo)->dc_huff_tbl_ptrs;
133
85
    ac_huff_tbl_ptrs = ((j_compress_ptr)cinfo)->ac_huff_tbl_ptrs;
134
85
  }
135
136
85
  add_huff_table(cinfo, &dc_huff_tbl_ptrs[0], bits_dc_luminance,
137
85
                 val_dc_luminance);
138
85
  add_huff_table(cinfo, &ac_huff_tbl_ptrs[0], bits_ac_luminance,
139
85
                 val_ac_luminance);
140
85
  add_huff_table(cinfo, &dc_huff_tbl_ptrs[1], bits_dc_chrominance,
141
85
                 val_dc_chrominance);
142
85
  add_huff_table(cinfo, &ac_huff_tbl_ptrs[1], bits_ac_chrominance,
143
85
                 val_ac_chrominance);
144
85
}
Unexecuted instantiation: jdhuff.c:std_huff_tables