/src/libjpeg-turbo/jstdhuff.c

Source (jump to first uncovered line)
/*
 * jstdhuff.c
 *
 * This file was part of the Independent JPEG Group's software:
 * Copyright (C) 1991-1998, Thomas G. Lane.
 * libjpeg-turbo Modifications:
 * Copyright (C) 2013, 2022, D. R. Commander.
 * For conditions of distribution and use, see the accompanying README.ijg
 * file.
 *
 * This file contains routines to set the default Huffman tables, if they are
 * not already set.
 */

/*
 * Huffman table setup routines
 */

LOCAL(void)
add_huff_table(j_common_ptr cinfo, JHUFF_TBL **htblptr, const UINT8 *bits,
               const UINT8 *val)
/* Define a Huffman table */
{
  int nsymbols, len;

  if (*htblptr == NULL)
    *htblptr = jpeg_alloc_huff_table(cinfo);
  else
    return;

  /* Copy the number-of-symbols-of-each-code-length counts */
  memcpy((*htblptr)->bits, bits, sizeof((*htblptr)->bits));

  /* Validate the counts.  We do this here mainly so we can copy the right
   * number of symbols from the val[] array, without risking marching off
   * the end of memory.  jchuff.c will do a more thorough test later.
   */
  nsymbols = 0;
  for (len = 1; len <= 16; len++)
    nsymbols += bits[len];
  if (nsymbols < 1 || nsymbols > 256)
    ERREXIT(cinfo, JERR_BAD_HUFF_TABLE);

  memcpy((*htblptr)->huffval, val, nsymbols * sizeof(UINT8));
  memset(&((*htblptr)->huffval[nsymbols]), 0,
         (256 - nsymbols) * sizeof(UINT8));

  /* Initialize sent_table FALSE so table will be written to JPEG file. */
  (*htblptr)->sent_table = FALSE;
}


LOCAL(void)
std_huff_tables(j_common_ptr cinfo)
/* Set up the standard Huffman tables (cf. JPEG standard section K.3) */
/* IMPORTANT: these are only valid for 8-bit data precision! */
{
  JHUFF_TBL **dc_huff_tbl_ptrs, **ac_huff_tbl_ptrs;

  static const UINT8 bits_dc_luminance[17] = {
    /* 0-base */ 0, 0, 1, 5, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0
  };
  static const UINT8 val_dc_luminance[] = {
    0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11
  };

  static const UINT8 bits_dc_chrominance[17] = {
    /* 0-base */ 0, 0, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0
  };
  static const UINT8 val_dc_chrominance[] = {
    0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11
  };

  static const UINT8 bits_ac_luminance[17] = {
    /* 0-base */ 0, 0, 2, 1, 3, 3, 2, 4, 3, 5, 5, 4, 4, 0, 0, 1, 0x7d
  };
  static const UINT8 val_ac_luminance[] = {
    0x01, 0x02, 0x03, 0x00, 0x04, 0x11, 0x05, 0x12,
    0x21, 0x31, 0x41, 0x06, 0x13, 0x51, 0x61, 0x07,
    0x22, 0x71, 0x14, 0x32, 0x81, 0x91, 0xa1, 0x08,
    0x23, 0x42, 0xb1, 0xc1, 0x15, 0x52, 0xd1, 0xf0,
    0x24, 0x33, 0x62, 0x72, 0x82, 0x09, 0x0a, 0x16,
    0x17, 0x18, 0x19, 0x1a, 0x25, 0x26, 0x27, 0x28,
    0x29, 0x2a, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39,
    0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49,
    0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59,
    0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69,
    0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79,
    0x7a, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89,
    0x8a, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98,
    0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7,
    0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6,
    0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3, 0xc4, 0xc5,
    0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2, 0xd3, 0xd4,
    0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda, 0xe1, 0xe2,
    0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea,
    0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8,
    0xf9, 0xfa
  };

  static const UINT8 bits_ac_chrominance[17] = {
    /* 0-base */ 0, 0, 2, 1, 2, 4, 4, 3, 4, 7, 5, 4, 4, 0, 1, 2, 0x77
  };
  static const UINT8 val_ac_chrominance[] = {
    0x00, 0x01, 0x02, 0x03, 0x11, 0x04, 0x05, 0x21,
    0x31, 0x06, 0x12, 0x41, 0x51, 0x07, 0x61, 0x71,
    0x13, 0x22, 0x32, 0x81, 0x08, 0x14, 0x42, 0x91,
    0xa1, 0xb1, 0xc1, 0x09, 0x23, 0x33, 0x52, 0xf0,
    0x15, 0x62, 0x72, 0xd1, 0x0a, 0x16, 0x24, 0x34,
    0xe1, 0x25, 0xf1, 0x17, 0x18, 0x19, 0x1a, 0x26,
    0x27, 0x28, 0x29, 0x2a, 0x35, 0x36, 0x37, 0x38,
    0x39, 0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48,
    0x49, 0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58,
    0x59, 0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68,
    0x69, 0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78,
    0x79, 0x7a, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
    0x88, 0x89, 0x8a, 0x92, 0x93, 0x94, 0x95, 0x96,
    0x97, 0x98, 0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5,
    0xa6, 0xa7, 0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4,
    0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3,
    0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2,
    0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda,
    0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9,
    0xea, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8,
    0xf9, 0xfa
  };

  if (cinfo->is_decompressor) {
    dc_huff_tbl_ptrs = ((j_decompress_ptr)cinfo)->dc_huff_tbl_ptrs;
    ac_huff_tbl_ptrs = ((j_decompress_ptr)cinfo)->ac_huff_tbl_ptrs;
  } else {
    dc_huff_tbl_ptrs = ((j_compress_ptr)cinfo)->dc_huff_tbl_ptrs;
    ac_huff_tbl_ptrs = ((j_compress_ptr)cinfo)->ac_huff_tbl_ptrs;
  }

  add_huff_table(cinfo, &dc_huff_tbl_ptrs[0], bits_dc_luminance,
                 val_dc_luminance);
  add_huff_table(cinfo, &ac_huff_tbl_ptrs[0], bits_ac_luminance,
                 val_ac_luminance);
  add_huff_table(cinfo, &dc_huff_tbl_ptrs[1], bits_dc_chrominance,
                 val_dc_chrominance);
  add_huff_table(cinfo, &ac_huff_tbl_ptrs[1], bits_ac_chrominance,
                 val_ac_chrominance);
}

Coverage Report

Created: 2024-06-18 06:05

Line	Count	Source (jump to first uncovered line)
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, 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	0	{
24	0	int nsymbols, len;
25
26	0	if (*htblptr == NULL)
27	0	*htblptr = jpeg_alloc_huff_table(cinfo);
28	0	else
29	0	return;
30
31		/* Copy the number-of-symbols-of-each-code-length counts */
32	0	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	0	nsymbols = 0;
39	0	for (len = 1; len <= 16; len++)
40	0	nsymbols += bits[len];
41	0	if (nsymbols < 1 \|\| nsymbols > 256)
42	0	ERREXIT(cinfo, JERR_BAD_HUFF_TABLE);
43
44	0	memcpy((htblptr)->huffval, val, nsymbols sizeof(UINT8));
45	0	memset(&((*htblptr)->huffval[nsymbols]), 0,
46	0	(256 - nsymbols) * sizeof(UINT8));
47
48		/* Initialize sent_table FALSE so table will be written to JPEG file. */
49	0	(*htblptr)->sent_table = FALSE;
50	0	} Unexecuted instantiation: jcparam.c:add_huff_table 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	0	{
58	0	JHUFF_TBL dc_huff_tbl_ptrs, ac_huff_tbl_ptrs;
59
60	0	static const UINT8 bits_dc_luminance[17] = {
61	0	/* 0-base */ 0, 0, 1, 5, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0
62	0	};
63	0	static const UINT8 val_dc_luminance[] = {
64	0	0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11
65	0	};
66
67	0	static const UINT8 bits_dc_chrominance[17] = {
68	0	/* 0-base */ 0, 0, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0
69	0	};
70	0	static const UINT8 val_dc_chrominance[] = {
71	0	0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11
72	0	};
73
74	0	static const UINT8 bits_ac_luminance[17] = {
75	0	/* 0-base */ 0, 0, 2, 1, 3, 3, 2, 4, 3, 5, 5, 4, 4, 0, 0, 1, 0x7d
76	0	};
77	0	static const UINT8 val_ac_luminance[] = {
78	0	0x01, 0x02, 0x03, 0x00, 0x04, 0x11, 0x05, 0x12,
79	0	0x21, 0x31, 0x41, 0x06, 0x13, 0x51, 0x61, 0x07,
80	0	0x22, 0x71, 0x14, 0x32, 0x81, 0x91, 0xa1, 0x08,
81	0	0x23, 0x42, 0xb1, 0xc1, 0x15, 0x52, 0xd1, 0xf0,
82	0	0x24, 0x33, 0x62, 0x72, 0x82, 0x09, 0x0a, 0x16,
83	0	0x17, 0x18, 0x19, 0x1a, 0x25, 0x26, 0x27, 0x28,
84	0	0x29, 0x2a, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39,
85	0	0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49,
86	0	0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59,
87	0	0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69,
88	0	0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79,
89	0	0x7a, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89,
90	0	0x8a, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98,
91	0	0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7,
92	0	0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6,
93	0	0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3, 0xc4, 0xc5,
94	0	0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2, 0xd3, 0xd4,
95	0	0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda, 0xe1, 0xe2,
96	0	0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea,
97	0	0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8,
98	0	0xf9, 0xfa
99	0	};
100
101	0	static const UINT8 bits_ac_chrominance[17] = {
102	0	/* 0-base */ 0, 0, 2, 1, 2, 4, 4, 3, 4, 7, 5, 4, 4, 0, 1, 2, 0x77
103	0	};
104	0	static const UINT8 val_ac_chrominance[] = {
105	0	0x00, 0x01, 0x02, 0x03, 0x11, 0x04, 0x05, 0x21,
106	0	0x31, 0x06, 0x12, 0x41, 0x51, 0x07, 0x61, 0x71,
107	0	0x13, 0x22, 0x32, 0x81, 0x08, 0x14, 0x42, 0x91,
108	0	0xa1, 0xb1, 0xc1, 0x09, 0x23, 0x33, 0x52, 0xf0,
109	0	0x15, 0x62, 0x72, 0xd1, 0x0a, 0x16, 0x24, 0x34,
110	0	0xe1, 0x25, 0xf1, 0x17, 0x18, 0x19, 0x1a, 0x26,
111	0	0x27, 0x28, 0x29, 0x2a, 0x35, 0x36, 0x37, 0x38,
112	0	0x39, 0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48,
113	0	0x49, 0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58,
114	0	0x59, 0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68,
115	0	0x69, 0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78,
116	0	0x79, 0x7a, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
117	0	0x88, 0x89, 0x8a, 0x92, 0x93, 0x94, 0x95, 0x96,
118	0	0x97, 0x98, 0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5,
119	0	0xa6, 0xa7, 0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4,
120	0	0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3,
121	0	0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2,
122	0	0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda,
123	0	0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9,
124	0	0xea, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8,
125	0	0xf9, 0xfa
126	0	};
127
128	0	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	0	} else {
132	0	dc_huff_tbl_ptrs = ((j_compress_ptr)cinfo)->dc_huff_tbl_ptrs;
133	0	ac_huff_tbl_ptrs = ((j_compress_ptr)cinfo)->ac_huff_tbl_ptrs;
134	0	}
135
136	0	add_huff_table(cinfo, &dc_huff_tbl_ptrs[0], bits_dc_luminance,
137	0	val_dc_luminance);
138	0	add_huff_table(cinfo, &ac_huff_tbl_ptrs[0], bits_ac_luminance,
139	0	val_ac_luminance);
140	0	add_huff_table(cinfo, &dc_huff_tbl_ptrs[1], bits_dc_chrominance,
141	0	val_dc_chrominance);
142	0	add_huff_table(cinfo, &ac_huff_tbl_ptrs[1], bits_ac_chrominance,
143	0	val_ac_chrominance);
144	0	} Unexecuted instantiation: jcparam.c:std_huff_tables Unexecuted instantiation: jdhuff.c:std_huff_tables