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media/libjpeg/jstdhuff.c@6474c204b198 (annotated)

media/libjpeg/jstdhuff.c

Wed, 31 Dec 2014 06:09:35 +0100

author
Michael Schloh von Bennewitz <michael@schloh.com>
date
Wed, 31 Dec 2014 06:09:35 +0100
changeset 0
6474c204b198
permissions
-rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

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

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