1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/media/libjpeg/jstdhuff.c Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,133 @@
1.4 +/*
1.5 +* jstdhuff.c
1.6 +*
1.7 +* This file was part of the Independent JPEG Group's software:
1.8 +* Copyright (C) 1991-1998, Thomas G. Lane.
1.9 +* libjpeg-turbo Modifications:
1.10 +* Copyright (C) 2013, D. R. Commander.
1.11 +* For conditions of distribution and use, see the accompanying README file.
1.12 +*
1.13 +* This file contains routines to set the default Huffman tables, if they are
1.14 +* not already set.
1.15 +*/
1.16 +
1.17 +/*
1.18 + * Huffman table setup routines
1.19 + */
1.20 +
1.21 +LOCAL(void)
1.22 +add_huff_table (j_common_ptr cinfo,
1.23 + JHUFF_TBL **htblptr, const UINT8 *bits, const UINT8 *val)
1.24 +/* Define a Huffman table */
1.25 +{
1.26 + int nsymbols, len;
1.27 +
1.28 + if (*htblptr == NULL)
1.29 + *htblptr = jpeg_alloc_huff_table(cinfo);
1.30 + else
1.31 + return;
1.32 +
1.33 + /* Copy the number-of-symbols-of-each-code-length counts */
1.34 + MEMCOPY((*htblptr)->bits, bits, SIZEOF((*htblptr)->bits));
1.35 +
1.36 + /* Validate the counts. We do this here mainly so we can copy the right
1.37 + * number of symbols from the val[] array, without risking marching off
1.38 + * the end of memory. jchuff.c will do a more thorough test later.
1.39 + */
1.40 + nsymbols = 0;
1.41 + for (len = 1; len <= 16; len++)
1.42 + nsymbols += bits[len];
1.43 + if (nsymbols < 1 || nsymbols > 256)
1.44 + ERREXIT(cinfo, JERR_BAD_HUFF_TABLE);
1.45 +
1.46 + MEMCOPY((*htblptr)->huffval, val, nsymbols * SIZEOF(UINT8));
1.47 +
1.48 + /* Initialize sent_table FALSE so table will be written to JPEG file. */
1.49 + (*htblptr)->sent_table = FALSE;
1.50 +}
1.51 +
1.52 +
1.53 +LOCAL(void)
1.54 +std_huff_tables (j_common_ptr cinfo)
1.55 +/* Set up the standard Huffman tables (cf. JPEG standard section K.3) */
1.56 +/* IMPORTANT: these are only valid for 8-bit data precision! */
1.57 +{
1.58 + JHUFF_TBL **dc_huff_tbl_ptrs, **ac_huff_tbl_ptrs;
1.59 +
1.60 + static const UINT8 bits_dc_luminance[17] =
1.61 + { /* 0-base */ 0, 0, 1, 5, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0 };
1.62 + static const UINT8 val_dc_luminance[] =
1.63 + { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 };
1.64 +
1.65 + static const UINT8 bits_dc_chrominance[17] =
1.66 + { /* 0-base */ 0, 0, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0 };
1.67 + static const UINT8 val_dc_chrominance[] =
1.68 + { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 };
1.69 +
1.70 + static const UINT8 bits_ac_luminance[17] =
1.71 + { /* 0-base */ 0, 0, 2, 1, 3, 3, 2, 4, 3, 5, 5, 4, 4, 0, 0, 1, 0x7d };
1.72 + static const UINT8 val_ac_luminance[] =
1.73 + { 0x01, 0x02, 0x03, 0x00, 0x04, 0x11, 0x05, 0x12,
1.74 + 0x21, 0x31, 0x41, 0x06, 0x13, 0x51, 0x61, 0x07,
1.75 + 0x22, 0x71, 0x14, 0x32, 0x81, 0x91, 0xa1, 0x08,
1.76 + 0x23, 0x42, 0xb1, 0xc1, 0x15, 0x52, 0xd1, 0xf0,
1.77 + 0x24, 0x33, 0x62, 0x72, 0x82, 0x09, 0x0a, 0x16,
1.78 + 0x17, 0x18, 0x19, 0x1a, 0x25, 0x26, 0x27, 0x28,
1.79 + 0x29, 0x2a, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39,
1.80 + 0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49,
1.81 + 0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59,
1.82 + 0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69,
1.83 + 0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79,
1.84 + 0x7a, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89,
1.85 + 0x8a, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98,
1.86 + 0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7,
1.87 + 0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6,
1.88 + 0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3, 0xc4, 0xc5,
1.89 + 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2, 0xd3, 0xd4,
1.90 + 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda, 0xe1, 0xe2,
1.91 + 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea,
1.92 + 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8,
1.93 + 0xf9, 0xfa };
1.94 +
1.95 + static const UINT8 bits_ac_chrominance[17] =
1.96 + { /* 0-base */ 0, 0, 2, 1, 2, 4, 4, 3, 4, 7, 5, 4, 4, 0, 1, 2, 0x77 };
1.97 + static const UINT8 val_ac_chrominance[] =
1.98 + { 0x00, 0x01, 0x02, 0x03, 0x11, 0x04, 0x05, 0x21,
1.99 + 0x31, 0x06, 0x12, 0x41, 0x51, 0x07, 0x61, 0x71,
1.100 + 0x13, 0x22, 0x32, 0x81, 0x08, 0x14, 0x42, 0x91,
1.101 + 0xa1, 0xb1, 0xc1, 0x09, 0x23, 0x33, 0x52, 0xf0,
1.102 + 0x15, 0x62, 0x72, 0xd1, 0x0a, 0x16, 0x24, 0x34,
1.103 + 0xe1, 0x25, 0xf1, 0x17, 0x18, 0x19, 0x1a, 0x26,
1.104 + 0x27, 0x28, 0x29, 0x2a, 0x35, 0x36, 0x37, 0x38,
1.105 + 0x39, 0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48,
1.106 + 0x49, 0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58,
1.107 + 0x59, 0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68,
1.108 + 0x69, 0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78,
1.109 + 0x79, 0x7a, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
1.110 + 0x88, 0x89, 0x8a, 0x92, 0x93, 0x94, 0x95, 0x96,
1.111 + 0x97, 0x98, 0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5,
1.112 + 0xa6, 0xa7, 0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4,
1.113 + 0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3,
1.114 + 0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2,
1.115 + 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda,
1.116 + 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9,
1.117 + 0xea, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8,
1.118 + 0xf9, 0xfa };
1.119 +
1.120 + if (cinfo->is_decompressor) {
1.121 + dc_huff_tbl_ptrs = ((j_decompress_ptr)cinfo)->dc_huff_tbl_ptrs;
1.122 + ac_huff_tbl_ptrs = ((j_decompress_ptr)cinfo)->ac_huff_tbl_ptrs;
1.123 + } else {
1.124 + dc_huff_tbl_ptrs = ((j_compress_ptr)cinfo)->dc_huff_tbl_ptrs;
1.125 + ac_huff_tbl_ptrs = ((j_compress_ptr)cinfo)->ac_huff_tbl_ptrs;
1.126 + }
1.127 +
1.128 + add_huff_table(cinfo, &dc_huff_tbl_ptrs[0], bits_dc_luminance,
1.129 + val_dc_luminance);
1.130 + add_huff_table(cinfo, &ac_huff_tbl_ptrs[0], bits_ac_luminance,
1.131 + val_ac_luminance);
1.132 + add_huff_table(cinfo, &dc_huff_tbl_ptrs[1], bits_dc_chrominance,
1.133 + val_dc_chrominance);
1.134 + add_huff_table(cinfo, &ac_huff_tbl_ptrs[1], bits_ac_chrominance,
1.135 + val_ac_chrominance);
1.136 +}
