The Tor Browser / file comparison
comparison: media/libjpeg/jstdhuff.c
media/libjpeg/jstdhuff.c
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
equal
deleted
inserted
replaced
| -1:000000000000 | 0:36c5b5d25b7d |
|---|---|
| 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, D. R. Commander. | |
| 8 * For conditions of distribution and use, see the accompanying README file. | |
| 9 * | |
| 10 * This file contains routines to set the default Huffman tables, if they are | |
| 11 * not already set. | |
| 12 */ | |
| 13 | |
| 14 /* | |
| 15 * Huffman table setup routines | |
| 16 */ | |
| 17 | |
| 18 LOCAL(void) | |
| 19 add_huff_table (j_common_ptr cinfo, | |
| 20 JHUFF_TBL **htblptr, const UINT8 *bits, const UINT8 *val) | |
| 21 /* Define a Huffman table */ | |
| 22 { | |
| 23 int nsymbols, len; | |
| 24 | |
| 25 if (*htblptr == NULL) | |
| 26 *htblptr = jpeg_alloc_huff_table(cinfo); | |
| 27 else | |
| 28 return; | |
| 29 | |
| 30 /* Copy the number-of-symbols-of-each-code-length counts */ | |
| 31 MEMCOPY((*htblptr)->bits, bits, SIZEOF((*htblptr)->bits)); | |
| 32 | |
| 33 /* Validate the counts. We do this here mainly so we can copy the right | |
| 34 * number of symbols from the val[] array, without risking marching off | |
| 35 * the end of memory. jchuff.c will do a more thorough test later. | |
| 36 */ | |
| 37 nsymbols = 0; | |
| 38 for (len = 1; len <= 16; len++) | |
| 39 nsymbols += bits[len]; | |
| 40 if (nsymbols < 1 || nsymbols > 256) | |
| 41 ERREXIT(cinfo, JERR_BAD_HUFF_TABLE); | |
| 42 | |
| 43 MEMCOPY((*htblptr)->huffval, val, nsymbols * SIZEOF(UINT8)); | |
| 44 | |
| 45 /* Initialize sent_table FALSE so table will be written to JPEG file. */ | |
| 46 (*htblptr)->sent_table = FALSE; | |
| 47 } | |
| 48 | |
| 49 | |
| 50 LOCAL(void) | |
| 51 std_huff_tables (j_common_ptr cinfo) | |
| 52 /* Set up the standard Huffman tables (cf. JPEG standard section K.3) */ | |
| 53 /* IMPORTANT: these are only valid for 8-bit data precision! */ | |
| 54 { | |
| 55 JHUFF_TBL **dc_huff_tbl_ptrs, **ac_huff_tbl_ptrs; | |
| 56 | |
| 57 static const UINT8 bits_dc_luminance[17] = | |
| 58 { /* 0-base */ 0, 0, 1, 5, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0 }; | |
| 59 static const UINT8 val_dc_luminance[] = | |
| 60 { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 }; | |
| 61 | |
| 62 static const UINT8 bits_dc_chrominance[17] = | |
| 63 { /* 0-base */ 0, 0, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0 }; | |
| 64 static const UINT8 val_dc_chrominance[] = | |
| 65 { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 }; | |
| 66 | |
| 67 static const UINT8 bits_ac_luminance[17] = | |
| 68 { /* 0-base */ 0, 0, 2, 1, 3, 3, 2, 4, 3, 5, 5, 4, 4, 0, 0, 1, 0x7d }; | |
| 69 static const UINT8 val_ac_luminance[] = | |
| 70 { 0x01, 0x02, 0x03, 0x00, 0x04, 0x11, 0x05, 0x12, | |
| 71 0x21, 0x31, 0x41, 0x06, 0x13, 0x51, 0x61, 0x07, | |
| 72 0x22, 0x71, 0x14, 0x32, 0x81, 0x91, 0xa1, 0x08, | |
| 73 0x23, 0x42, 0xb1, 0xc1, 0x15, 0x52, 0xd1, 0xf0, | |
| 74 0x24, 0x33, 0x62, 0x72, 0x82, 0x09, 0x0a, 0x16, | |
| 75 0x17, 0x18, 0x19, 0x1a, 0x25, 0x26, 0x27, 0x28, | |
| 76 0x29, 0x2a, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, | |
| 77 0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, | |
| 78 0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, | |
| 79 0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, | |
| 80 0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, | |
| 81 0x7a, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, | |
| 82 0x8a, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, | |
| 83 0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, | |
| 84 0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, | |
| 85 0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3, 0xc4, 0xc5, | |
| 86 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2, 0xd3, 0xd4, | |
| 87 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda, 0xe1, 0xe2, | |
| 88 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea, | |
| 89 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8, | |
| 90 0xf9, 0xfa }; | |
| 91 | |
| 92 static const UINT8 bits_ac_chrominance[17] = | |
| 93 { /* 0-base */ 0, 0, 2, 1, 2, 4, 4, 3, 4, 7, 5, 4, 4, 0, 1, 2, 0x77 }; | |
| 94 static const UINT8 val_ac_chrominance[] = | |
| 95 { 0x00, 0x01, 0x02, 0x03, 0x11, 0x04, 0x05, 0x21, | |
| 96 0x31, 0x06, 0x12, 0x41, 0x51, 0x07, 0x61, 0x71, | |
| 97 0x13, 0x22, 0x32, 0x81, 0x08, 0x14, 0x42, 0x91, | |
| 98 0xa1, 0xb1, 0xc1, 0x09, 0x23, 0x33, 0x52, 0xf0, | |
| 99 0x15, 0x62, 0x72, 0xd1, 0x0a, 0x16, 0x24, 0x34, | |
| 100 0xe1, 0x25, 0xf1, 0x17, 0x18, 0x19, 0x1a, 0x26, | |
| 101 0x27, 0x28, 0x29, 0x2a, 0x35, 0x36, 0x37, 0x38, | |
| 102 0x39, 0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, | |
| 103 0x49, 0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, | |
| 104 0x59, 0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, | |
| 105 0x69, 0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, | |
| 106 0x79, 0x7a, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, | |
| 107 0x88, 0x89, 0x8a, 0x92, 0x93, 0x94, 0x95, 0x96, | |
| 108 0x97, 0x98, 0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5, | |
| 109 0xa6, 0xa7, 0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4, | |
| 110 0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3, | |
| 111 0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2, | |
| 112 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda, | |
| 113 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, | |
| 114 0xea, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8, | |
| 115 0xf9, 0xfa }; | |
| 116 | |
| 117 if (cinfo->is_decompressor) { | |
| 118 dc_huff_tbl_ptrs = ((j_decompress_ptr)cinfo)->dc_huff_tbl_ptrs; | |
| 119 ac_huff_tbl_ptrs = ((j_decompress_ptr)cinfo)->ac_huff_tbl_ptrs; | |
| 120 } else { | |
| 121 dc_huff_tbl_ptrs = ((j_compress_ptr)cinfo)->dc_huff_tbl_ptrs; | |
| 122 ac_huff_tbl_ptrs = ((j_compress_ptr)cinfo)->ac_huff_tbl_ptrs; | |
| 123 } | |
| 124 | |
| 125 add_huff_table(cinfo, &dc_huff_tbl_ptrs[0], bits_dc_luminance, | |
| 126 val_dc_luminance); | |
| 127 add_huff_table(cinfo, &ac_huff_tbl_ptrs[0], bits_ac_luminance, | |
| 128 val_ac_luminance); | |
| 129 add_huff_table(cinfo, &dc_huff_tbl_ptrs[1], bits_dc_chrominance, | |
| 130 val_dc_chrominance); | |
| 131 add_huff_table(cinfo, &ac_huff_tbl_ptrs[1], bits_ac_chrominance, | |
| 132 val_ac_chrominance); | |
| 133 } |
