Shoaib Ahmed / Mbed 2 deprecated uzairkhan

Final 350 project

Dependencies:   uzair Camera_LS_Y201 F7_Ethernet LCD_DISCO_F746NG NetworkAPI SDFileSystem mbed

includes/jcparam.c@0:791a779d6220, 2017-07-31 (annotated)

Committer:
shoaib_ahmed
Date:
Mon Jul 31 09:16:35 2017 +0000
Revision:
0:791a779d6220
final project;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
shoaib_ahmed 0:791a779d6220 1 /*
shoaib_ahmed 0:791a779d6220 2 * jcparam.c
shoaib_ahmed 0:791a779d6220 3 *
shoaib_ahmed 0:791a779d6220 4 * Copyright (C) 1991-1998, Thomas G. Lane.
shoaib_ahmed 0:791a779d6220 5 * Modified 2003-2013 by Guido Vollbeding.
shoaib_ahmed 0:791a779d6220 6 * This file is part of the Independent JPEG Group's software.
shoaib_ahmed 0:791a779d6220 7 * For conditions of distribution and use, see the accompanying README file.
shoaib_ahmed 0:791a779d6220 8 *
shoaib_ahmed 0:791a779d6220 9 * This file contains optional default-setting code for the JPEG compressor.
shoaib_ahmed 0:791a779d6220 10 * Applications do not have to use this file, but those that don't use it
shoaib_ahmed 0:791a779d6220 11 * must know a lot more about the innards of the JPEG code.
shoaib_ahmed 0:791a779d6220 12 */
shoaib_ahmed 0:791a779d6220 13
shoaib_ahmed 0:791a779d6220 14 #define JPEG_INTERNALS
shoaib_ahmed 0:791a779d6220 15 #include "jinclude.h"
shoaib_ahmed 0:791a779d6220 16 #include "jpeglib.h"
shoaib_ahmed 0:791a779d6220 17
shoaib_ahmed 0:791a779d6220 18
shoaib_ahmed 0:791a779d6220 19 /*
shoaib_ahmed 0:791a779d6220 20 * Quantization table setup routines
shoaib_ahmed 0:791a779d6220 21 */
shoaib_ahmed 0:791a779d6220 22
shoaib_ahmed 0:791a779d6220 23 GLOBAL(void)
shoaib_ahmed 0:791a779d6220 24 jpeg_add_quant_table (j_compress_ptr cinfo, int which_tbl,
shoaib_ahmed 0:791a779d6220 25 const unsigned int *basic_table,
shoaib_ahmed 0:791a779d6220 26 int scale_factor, boolean force_baseline)
shoaib_ahmed 0:791a779d6220 27 /* Define a quantization table equal to the basic_table times
shoaib_ahmed 0:791a779d6220 28 * a scale factor (given as a percentage).
shoaib_ahmed 0:791a779d6220 29 * If force_baseline is TRUE, the computed quantization table entries
shoaib_ahmed 0:791a779d6220 30 * are limited to 1..255 for JPEG baseline compatibility.
shoaib_ahmed 0:791a779d6220 31 */
shoaib_ahmed 0:791a779d6220 32 {
shoaib_ahmed 0:791a779d6220 33 JQUANT_TBL ** qtblptr;
shoaib_ahmed 0:791a779d6220 34 int i;
shoaib_ahmed 0:791a779d6220 35 long temp;
shoaib_ahmed 0:791a779d6220 36
shoaib_ahmed 0:791a779d6220 37 /* Safety check to ensure start_compress not called yet. */
shoaib_ahmed 0:791a779d6220 38 if (cinfo->global_state != CSTATE_START)
shoaib_ahmed 0:791a779d6220 39 ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
shoaib_ahmed 0:791a779d6220 40
shoaib_ahmed 0:791a779d6220 41 if (which_tbl < 0 || which_tbl >= NUM_QUANT_TBLS)
shoaib_ahmed 0:791a779d6220 42 ERREXIT1(cinfo, JERR_DQT_INDEX, which_tbl);
shoaib_ahmed 0:791a779d6220 43
shoaib_ahmed 0:791a779d6220 44 qtblptr = & cinfo->quant_tbl_ptrs[which_tbl];
shoaib_ahmed 0:791a779d6220 45
shoaib_ahmed 0:791a779d6220 46 if (*qtblptr == NULL)
shoaib_ahmed 0:791a779d6220 47 *qtblptr = jpeg_alloc_quant_table((j_common_ptr) cinfo);
shoaib_ahmed 0:791a779d6220 48
shoaib_ahmed 0:791a779d6220 49 for (i = 0; i < DCTSIZE2; i++) {
shoaib_ahmed 0:791a779d6220 50 temp = ((long) basic_table[i] * scale_factor + 50L) / 100L;
shoaib_ahmed 0:791a779d6220 51 /* limit the values to the valid range */
shoaib_ahmed 0:791a779d6220 52 if (temp <= 0L) temp = 1L;
shoaib_ahmed 0:791a779d6220 53 if (temp > 32767L) temp = 32767L; /* max quantizer needed for 12 bits */
shoaib_ahmed 0:791a779d6220 54 if (force_baseline && temp > 255L)
shoaib_ahmed 0:791a779d6220 55 temp = 255L; /* limit to baseline range if requested */
shoaib_ahmed 0:791a779d6220 56 (*qtblptr)->quantval[i] = (UINT16) temp;
shoaib_ahmed 0:791a779d6220 57 }
shoaib_ahmed 0:791a779d6220 58
shoaib_ahmed 0:791a779d6220 59 /* Initialize sent_table FALSE so table will be written to JPEG file. */
shoaib_ahmed 0:791a779d6220 60 (*qtblptr)->sent_table = FALSE;
shoaib_ahmed 0:791a779d6220 61 }
shoaib_ahmed 0:791a779d6220 62
shoaib_ahmed 0:791a779d6220 63
shoaib_ahmed 0:791a779d6220 64 /* These are the sample quantization tables given in JPEG spec section K.1.
shoaib_ahmed 0:791a779d6220 65 * The spec says that the values given produce "good" quality, and
shoaib_ahmed 0:791a779d6220 66 * when divided by 2, "very good" quality.
shoaib_ahmed 0:791a779d6220 67 */
shoaib_ahmed 0:791a779d6220 68 static const unsigned int std_luminance_quant_tbl[DCTSIZE2] = {
shoaib_ahmed 0:791a779d6220 69 16, 11, 10, 16, 24, 40, 51, 61,
shoaib_ahmed 0:791a779d6220 70 12, 12, 14, 19, 26, 58, 60, 55,
shoaib_ahmed 0:791a779d6220 71 14, 13, 16, 24, 40, 57, 69, 56,
shoaib_ahmed 0:791a779d6220 72 14, 17, 22, 29, 51, 87, 80, 62,
shoaib_ahmed 0:791a779d6220 73 18, 22, 37, 56, 68, 109, 103, 77,
shoaib_ahmed 0:791a779d6220 74 24, 35, 55, 64, 81, 104, 113, 92,
shoaib_ahmed 0:791a779d6220 75 49, 64, 78, 87, 103, 121, 120, 101,
shoaib_ahmed 0:791a779d6220 76 72, 92, 95, 98, 112, 100, 103, 99
shoaib_ahmed 0:791a779d6220 77 };
shoaib_ahmed 0:791a779d6220 78 static const unsigned int std_chrominance_quant_tbl[DCTSIZE2] = {
shoaib_ahmed 0:791a779d6220 79 17, 18, 24, 47, 99, 99, 99, 99,
shoaib_ahmed 0:791a779d6220 80 18, 21, 26, 66, 99, 99, 99, 99,
shoaib_ahmed 0:791a779d6220 81 24, 26, 56, 99, 99, 99, 99, 99,
shoaib_ahmed 0:791a779d6220 82 47, 66, 99, 99, 99, 99, 99, 99,
shoaib_ahmed 0:791a779d6220 83 99, 99, 99, 99, 99, 99, 99, 99,
shoaib_ahmed 0:791a779d6220 84 99, 99, 99, 99, 99, 99, 99, 99,
shoaib_ahmed 0:791a779d6220 85 99, 99, 99, 99, 99, 99, 99, 99,
shoaib_ahmed 0:791a779d6220 86 99, 99, 99, 99, 99, 99, 99, 99
shoaib_ahmed 0:791a779d6220 87 };
shoaib_ahmed 0:791a779d6220 88
shoaib_ahmed 0:791a779d6220 89
shoaib_ahmed 0:791a779d6220 90 GLOBAL(void)
shoaib_ahmed 0:791a779d6220 91 jpeg_default_qtables (j_compress_ptr cinfo, boolean force_baseline)
shoaib_ahmed 0:791a779d6220 92 /* Set or change the 'quality' (quantization) setting, using default tables
shoaib_ahmed 0:791a779d6220 93 * and straight percentage-scaling quality scales.
shoaib_ahmed 0:791a779d6220 94 * This entry point allows different scalings for luminance and chrominance.
shoaib_ahmed 0:791a779d6220 95 */
shoaib_ahmed 0:791a779d6220 96 {
shoaib_ahmed 0:791a779d6220 97 /* Set up two quantization tables using the specified scaling */
shoaib_ahmed 0:791a779d6220 98 jpeg_add_quant_table(cinfo, 0, std_luminance_quant_tbl,
shoaib_ahmed 0:791a779d6220 99 cinfo->q_scale_factor[0], force_baseline);
shoaib_ahmed 0:791a779d6220 100 jpeg_add_quant_table(cinfo, 1, std_chrominance_quant_tbl,
shoaib_ahmed 0:791a779d6220 101 cinfo->q_scale_factor[1], force_baseline);
shoaib_ahmed 0:791a779d6220 102 }
shoaib_ahmed 0:791a779d6220 103
shoaib_ahmed 0:791a779d6220 104
shoaib_ahmed 0:791a779d6220 105 GLOBAL(void)
shoaib_ahmed 0:791a779d6220 106 jpeg_set_linear_quality (j_compress_ptr cinfo, int scale_factor,
shoaib_ahmed 0:791a779d6220 107 boolean force_baseline)
shoaib_ahmed 0:791a779d6220 108 /* Set or change the 'quality' (quantization) setting, using default tables
shoaib_ahmed 0:791a779d6220 109 * and a straight percentage-scaling quality scale. In most cases it's better
shoaib_ahmed 0:791a779d6220 110 * to use jpeg_set_quality (below); this entry point is provided for
shoaib_ahmed 0:791a779d6220 111 * applications that insist on a linear percentage scaling.
shoaib_ahmed 0:791a779d6220 112 */
shoaib_ahmed 0:791a779d6220 113 {
shoaib_ahmed 0:791a779d6220 114 /* Set up two quantization tables using the specified scaling */
shoaib_ahmed 0:791a779d6220 115 jpeg_add_quant_table(cinfo, 0, std_luminance_quant_tbl,
shoaib_ahmed 0:791a779d6220 116 scale_factor, force_baseline);
shoaib_ahmed 0:791a779d6220 117 jpeg_add_quant_table(cinfo, 1, std_chrominance_quant_tbl,
shoaib_ahmed 0:791a779d6220 118 scale_factor, force_baseline);
shoaib_ahmed 0:791a779d6220 119 }
shoaib_ahmed 0:791a779d6220 120
shoaib_ahmed 0:791a779d6220 121
shoaib_ahmed 0:791a779d6220 122 GLOBAL(int)
shoaib_ahmed 0:791a779d6220 123 jpeg_quality_scaling (int quality)
shoaib_ahmed 0:791a779d6220 124 /* Convert a user-specified quality rating to a percentage scaling factor
shoaib_ahmed 0:791a779d6220 125 * for an underlying quantization table, using our recommended scaling curve.
shoaib_ahmed 0:791a779d6220 126 * The input 'quality' factor should be 0 (terrible) to 100 (very good).
shoaib_ahmed 0:791a779d6220 127 */
shoaib_ahmed 0:791a779d6220 128 {
shoaib_ahmed 0:791a779d6220 129 /* Safety limit on quality factor. Convert 0 to 1 to avoid zero divide. */
shoaib_ahmed 0:791a779d6220 130 if (quality <= 0) quality = 1;
shoaib_ahmed 0:791a779d6220 131 if (quality > 100) quality = 100;
shoaib_ahmed 0:791a779d6220 132
shoaib_ahmed 0:791a779d6220 133 /* The basic table is used as-is (scaling 100) for a quality of 50.
shoaib_ahmed 0:791a779d6220 134 * Qualities 50..100 are converted to scaling percentage 200 - 2*Q;
shoaib_ahmed 0:791a779d6220 135 * note that at Q=100 the scaling is 0, which will cause jpeg_add_quant_table
shoaib_ahmed 0:791a779d6220 136 * to make all the table entries 1 (hence, minimum quantization loss).
shoaib_ahmed 0:791a779d6220 137 * Qualities 1..50 are converted to scaling percentage 5000/Q.
shoaib_ahmed 0:791a779d6220 138 */
shoaib_ahmed 0:791a779d6220 139 if (quality < 50)
shoaib_ahmed 0:791a779d6220 140 quality = 5000 / quality;
shoaib_ahmed 0:791a779d6220 141 else
shoaib_ahmed 0:791a779d6220 142 quality = 200 - quality*2;
shoaib_ahmed 0:791a779d6220 143
shoaib_ahmed 0:791a779d6220 144 return quality;
shoaib_ahmed 0:791a779d6220 145 }
shoaib_ahmed 0:791a779d6220 146
shoaib_ahmed 0:791a779d6220 147
shoaib_ahmed 0:791a779d6220 148 GLOBAL(void)
shoaib_ahmed 0:791a779d6220 149 jpeg_set_quality (j_compress_ptr cinfo, int quality, boolean force_baseline)
shoaib_ahmed 0:791a779d6220 150 /* Set or change the 'quality' (quantization) setting, using default tables.
shoaib_ahmed 0:791a779d6220 151 * This is the standard quality-adjusting entry point for typical user
shoaib_ahmed 0:791a779d6220 152 * interfaces; only those who want detailed control over quantization tables
shoaib_ahmed 0:791a779d6220 153 * would use the preceding routines directly.
shoaib_ahmed 0:791a779d6220 154 */
shoaib_ahmed 0:791a779d6220 155 {
shoaib_ahmed 0:791a779d6220 156 /* Convert user 0-100 rating to percentage scaling */
shoaib_ahmed 0:791a779d6220 157 quality = jpeg_quality_scaling(quality);
shoaib_ahmed 0:791a779d6220 158
shoaib_ahmed 0:791a779d6220 159 /* Set up standard quality tables */
shoaib_ahmed 0:791a779d6220 160 jpeg_set_linear_quality(cinfo, quality, force_baseline);
shoaib_ahmed 0:791a779d6220 161 }
shoaib_ahmed 0:791a779d6220 162
shoaib_ahmed 0:791a779d6220 163
shoaib_ahmed 0:791a779d6220 164 /*
shoaib_ahmed 0:791a779d6220 165 * Huffman table setup routines
shoaib_ahmed 0:791a779d6220 166 */
shoaib_ahmed 0:791a779d6220 167
shoaib_ahmed 0:791a779d6220 168 LOCAL(void)
shoaib_ahmed 0:791a779d6220 169 add_huff_table (j_compress_ptr cinfo,
shoaib_ahmed 0:791a779d6220 170 JHUFF_TBL **htblptr, const UINT8 *bits, const UINT8 *val)
shoaib_ahmed 0:791a779d6220 171 /* Define a Huffman table */
shoaib_ahmed 0:791a779d6220 172 {
shoaib_ahmed 0:791a779d6220 173 int nsymbols, len;
shoaib_ahmed 0:791a779d6220 174
shoaib_ahmed 0:791a779d6220 175 if (*htblptr == NULL)
shoaib_ahmed 0:791a779d6220 176 *htblptr = jpeg_alloc_huff_table((j_common_ptr) cinfo);
shoaib_ahmed 0:791a779d6220 177
shoaib_ahmed 0:791a779d6220 178 /* Copy the number-of-symbols-of-each-code-length counts */
shoaib_ahmed 0:791a779d6220 179 MEMCOPY((*htblptr)->bits, bits, SIZEOF((*htblptr)->bits));
shoaib_ahmed 0:791a779d6220 180
shoaib_ahmed 0:791a779d6220 181 /* Validate the counts. We do this here mainly so we can copy the right
shoaib_ahmed 0:791a779d6220 182 * number of symbols from the val[] array, without risking marching off
shoaib_ahmed 0:791a779d6220 183 * the end of memory. jchuff.c will do a more thorough test later.
shoaib_ahmed 0:791a779d6220 184 */
shoaib_ahmed 0:791a779d6220 185 nsymbols = 0;
shoaib_ahmed 0:791a779d6220 186 for (len = 1; len <= 16; len++)
shoaib_ahmed 0:791a779d6220 187 nsymbols += bits[len];
shoaib_ahmed 0:791a779d6220 188 if (nsymbols < 1 || nsymbols > 256)
shoaib_ahmed 0:791a779d6220 189 ERREXIT(cinfo, JERR_BAD_HUFF_TABLE);
shoaib_ahmed 0:791a779d6220 190
shoaib_ahmed 0:791a779d6220 191 MEMCOPY((*htblptr)->huffval, val, nsymbols * SIZEOF(UINT8));
shoaib_ahmed 0:791a779d6220 192
shoaib_ahmed 0:791a779d6220 193 /* Initialize sent_table FALSE so table will be written to JPEG file. */
shoaib_ahmed 0:791a779d6220 194 (*htblptr)->sent_table = FALSE;
shoaib_ahmed 0:791a779d6220 195 }
shoaib_ahmed 0:791a779d6220 196
shoaib_ahmed 0:791a779d6220 197
shoaib_ahmed 0:791a779d6220 198 LOCAL(void)
shoaib_ahmed 0:791a779d6220 199 std_huff_tables (j_compress_ptr cinfo)
shoaib_ahmed 0:791a779d6220 200 /* Set up the standard Huffman tables (cf. JPEG standard section K.3) */
shoaib_ahmed 0:791a779d6220 201 /* IMPORTANT: these are only valid for 8-bit data precision! */
shoaib_ahmed 0:791a779d6220 202 {
shoaib_ahmed 0:791a779d6220 203 static const UINT8 bits_dc_luminance[17] =
shoaib_ahmed 0:791a779d6220 204 { /* 0-base */ 0, 0, 1, 5, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0 };
shoaib_ahmed 0:791a779d6220 205 static const UINT8 val_dc_luminance[] =
shoaib_ahmed 0:791a779d6220 206 { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 };
shoaib_ahmed 0:791a779d6220 207
shoaib_ahmed 0:791a779d6220 208 static const UINT8 bits_dc_chrominance[17] =
shoaib_ahmed 0:791a779d6220 209 { /* 0-base */ 0, 0, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0 };
shoaib_ahmed 0:791a779d6220 210 static const UINT8 val_dc_chrominance[] =
shoaib_ahmed 0:791a779d6220 211 { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 };
shoaib_ahmed 0:791a779d6220 212
shoaib_ahmed 0:791a779d6220 213 static const UINT8 bits_ac_luminance[17] =
shoaib_ahmed 0:791a779d6220 214 { /* 0-base */ 0, 0, 2, 1, 3, 3, 2, 4, 3, 5, 5, 4, 4, 0, 0, 1, 0x7d };
shoaib_ahmed 0:791a779d6220 215 static const UINT8 val_ac_luminance[] =
shoaib_ahmed 0:791a779d6220 216 { 0x01, 0x02, 0x03, 0x00, 0x04, 0x11, 0x05, 0x12,
shoaib_ahmed 0:791a779d6220 217 0x21, 0x31, 0x41, 0x06, 0x13, 0x51, 0x61, 0x07,
shoaib_ahmed 0:791a779d6220 218 0x22, 0x71, 0x14, 0x32, 0x81, 0x91, 0xa1, 0x08,
shoaib_ahmed 0:791a779d6220 219 0x23, 0x42, 0xb1, 0xc1, 0x15, 0x52, 0xd1, 0xf0,
shoaib_ahmed 0:791a779d6220 220 0x24, 0x33, 0x62, 0x72, 0x82, 0x09, 0x0a, 0x16,
shoaib_ahmed 0:791a779d6220 221 0x17, 0x18, 0x19, 0x1a, 0x25, 0x26, 0x27, 0x28,
shoaib_ahmed 0:791a779d6220 222 0x29, 0x2a, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39,
shoaib_ahmed 0:791a779d6220 223 0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49,
shoaib_ahmed 0:791a779d6220 224 0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59,
shoaib_ahmed 0:791a779d6220 225 0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69,
shoaib_ahmed 0:791a779d6220 226 0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79,
shoaib_ahmed 0:791a779d6220 227 0x7a, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89,
shoaib_ahmed 0:791a779d6220 228 0x8a, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98,
shoaib_ahmed 0:791a779d6220 229 0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7,
shoaib_ahmed 0:791a779d6220 230 0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6,
shoaib_ahmed 0:791a779d6220 231 0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3, 0xc4, 0xc5,
shoaib_ahmed 0:791a779d6220 232 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2, 0xd3, 0xd4,
shoaib_ahmed 0:791a779d6220 233 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda, 0xe1, 0xe2,
shoaib_ahmed 0:791a779d6220 234 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea,
shoaib_ahmed 0:791a779d6220 235 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8,
shoaib_ahmed 0:791a779d6220 236 0xf9, 0xfa };
shoaib_ahmed 0:791a779d6220 237
shoaib_ahmed 0:791a779d6220 238 static const UINT8 bits_ac_chrominance[17] =
shoaib_ahmed 0:791a779d6220 239 { /* 0-base */ 0, 0, 2, 1, 2, 4, 4, 3, 4, 7, 5, 4, 4, 0, 1, 2, 0x77 };
shoaib_ahmed 0:791a779d6220 240 static const UINT8 val_ac_chrominance[] =
shoaib_ahmed 0:791a779d6220 241 { 0x00, 0x01, 0x02, 0x03, 0x11, 0x04, 0x05, 0x21,
shoaib_ahmed 0:791a779d6220 242 0x31, 0x06, 0x12, 0x41, 0x51, 0x07, 0x61, 0x71,
shoaib_ahmed 0:791a779d6220 243 0x13, 0x22, 0x32, 0x81, 0x08, 0x14, 0x42, 0x91,
shoaib_ahmed 0:791a779d6220 244 0xa1, 0xb1, 0xc1, 0x09, 0x23, 0x33, 0x52, 0xf0,
shoaib_ahmed 0:791a779d6220 245 0x15, 0x62, 0x72, 0xd1, 0x0a, 0x16, 0x24, 0x34,
shoaib_ahmed 0:791a779d6220 246 0xe1, 0x25, 0xf1, 0x17, 0x18, 0x19, 0x1a, 0x26,
shoaib_ahmed 0:791a779d6220 247 0x27, 0x28, 0x29, 0x2a, 0x35, 0x36, 0x37, 0x38,
shoaib_ahmed 0:791a779d6220 248 0x39, 0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48,
shoaib_ahmed 0:791a779d6220 249 0x49, 0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58,
shoaib_ahmed 0:791a779d6220 250 0x59, 0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68,
shoaib_ahmed 0:791a779d6220 251 0x69, 0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78,
shoaib_ahmed 0:791a779d6220 252 0x79, 0x7a, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
shoaib_ahmed 0:791a779d6220 253 0x88, 0x89, 0x8a, 0x92, 0x93, 0x94, 0x95, 0x96,
shoaib_ahmed 0:791a779d6220 254 0x97, 0x98, 0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5,
shoaib_ahmed 0:791a779d6220 255 0xa6, 0xa7, 0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4,
shoaib_ahmed 0:791a779d6220 256 0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3,
shoaib_ahmed 0:791a779d6220 257 0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2,
shoaib_ahmed 0:791a779d6220 258 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda,
shoaib_ahmed 0:791a779d6220 259 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9,
shoaib_ahmed 0:791a779d6220 260 0xea, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8,
shoaib_ahmed 0:791a779d6220 261 0xf9, 0xfa };
shoaib_ahmed 0:791a779d6220 262
shoaib_ahmed 0:791a779d6220 263 add_huff_table(cinfo, &cinfo->dc_huff_tbl_ptrs[0],
shoaib_ahmed 0:791a779d6220 264 bits_dc_luminance, val_dc_luminance);
shoaib_ahmed 0:791a779d6220 265 add_huff_table(cinfo, &cinfo->ac_huff_tbl_ptrs[0],
shoaib_ahmed 0:791a779d6220 266 bits_ac_luminance, val_ac_luminance);
shoaib_ahmed 0:791a779d6220 267 add_huff_table(cinfo, &cinfo->dc_huff_tbl_ptrs[1],
shoaib_ahmed 0:791a779d6220 268 bits_dc_chrominance, val_dc_chrominance);
shoaib_ahmed 0:791a779d6220 269 add_huff_table(cinfo, &cinfo->ac_huff_tbl_ptrs[1],
shoaib_ahmed 0:791a779d6220 270 bits_ac_chrominance, val_ac_chrominance);
shoaib_ahmed 0:791a779d6220 271 }
shoaib_ahmed 0:791a779d6220 272
shoaib_ahmed 0:791a779d6220 273
shoaib_ahmed 0:791a779d6220 274 /*
shoaib_ahmed 0:791a779d6220 275 * Default parameter setup for compression.
shoaib_ahmed 0:791a779d6220 276 *
shoaib_ahmed 0:791a779d6220 277 * Applications that don't choose to use this routine must do their
shoaib_ahmed 0:791a779d6220 278 * own setup of all these parameters. Alternately, you can call this
shoaib_ahmed 0:791a779d6220 279 * to establish defaults and then alter parameters selectively. This
shoaib_ahmed 0:791a779d6220 280 * is the recommended approach since, if we add any new parameters,
shoaib_ahmed 0:791a779d6220 281 * your code will still work (they'll be set to reasonable defaults).
shoaib_ahmed 0:791a779d6220 282 */
shoaib_ahmed 0:791a779d6220 283
shoaib_ahmed 0:791a779d6220 284 GLOBAL(void)
shoaib_ahmed 0:791a779d6220 285 jpeg_set_defaults (j_compress_ptr cinfo)
shoaib_ahmed 0:791a779d6220 286 {
shoaib_ahmed 0:791a779d6220 287 int i;
shoaib_ahmed 0:791a779d6220 288
shoaib_ahmed 0:791a779d6220 289 /* Safety check to ensure start_compress not called yet. */
shoaib_ahmed 0:791a779d6220 290 if (cinfo->global_state != CSTATE_START)
shoaib_ahmed 0:791a779d6220 291 ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
shoaib_ahmed 0:791a779d6220 292
shoaib_ahmed 0:791a779d6220 293 /* Allocate comp_info array large enough for maximum component count.
shoaib_ahmed 0:791a779d6220 294 * Array is made permanent in case application wants to compress
shoaib_ahmed 0:791a779d6220 295 * multiple images at same param settings.
shoaib_ahmed 0:791a779d6220 296 */
shoaib_ahmed 0:791a779d6220 297 if (cinfo->comp_info == NULL)
shoaib_ahmed 0:791a779d6220 298 cinfo->comp_info = (jpeg_component_info *)
shoaib_ahmed 0:791a779d6220 299 (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_PERMANENT,
shoaib_ahmed 0:791a779d6220 300 MAX_COMPONENTS * SIZEOF(jpeg_component_info));
shoaib_ahmed 0:791a779d6220 301
shoaib_ahmed 0:791a779d6220 302 /* Initialize everything not dependent on the color space */
shoaib_ahmed 0:791a779d6220 303
shoaib_ahmed 0:791a779d6220 304 cinfo->scale_num = 1; /* 1:1 scaling */
shoaib_ahmed 0:791a779d6220 305 cinfo->scale_denom = 1;
shoaib_ahmed 0:791a779d6220 306 cinfo->data_precision = BITS_IN_JSAMPLE;
shoaib_ahmed 0:791a779d6220 307 /* Set up two quantization tables using default quality of 75 */
shoaib_ahmed 0:791a779d6220 308 jpeg_set_quality(cinfo, 75, TRUE);
shoaib_ahmed 0:791a779d6220 309 /* Set up two Huffman tables */
shoaib_ahmed 0:791a779d6220 310 std_huff_tables(cinfo);
shoaib_ahmed 0:791a779d6220 311
shoaib_ahmed 0:791a779d6220 312 /* Initialize default arithmetic coding conditioning */
shoaib_ahmed 0:791a779d6220 313 for (i = 0; i < NUM_ARITH_TBLS; i++) {
shoaib_ahmed 0:791a779d6220 314 cinfo->arith_dc_L[i] = 0;
shoaib_ahmed 0:791a779d6220 315 cinfo->arith_dc_U[i] = 1;
shoaib_ahmed 0:791a779d6220 316 cinfo->arith_ac_K[i] = 5;
shoaib_ahmed 0:791a779d6220 317 }
shoaib_ahmed 0:791a779d6220 318
shoaib_ahmed 0:791a779d6220 319 /* Default is no multiple-scan output */
shoaib_ahmed 0:791a779d6220 320 cinfo->scan_info = NULL;
shoaib_ahmed 0:791a779d6220 321 cinfo->num_scans = 0;
shoaib_ahmed 0:791a779d6220 322
shoaib_ahmed 0:791a779d6220 323 /* Expect normal source image, not raw downsampled data */
shoaib_ahmed 0:791a779d6220 324 cinfo->raw_data_in = FALSE;
shoaib_ahmed 0:791a779d6220 325
shoaib_ahmed 0:791a779d6220 326 /* The standard Huffman tables are only valid for 8-bit data precision.
shoaib_ahmed 0:791a779d6220 327 * If the precision is higher, use arithmetic coding.
shoaib_ahmed 0:791a779d6220 328 * (Alternatively, using Huffman coding would be possible with forcing
shoaib_ahmed 0:791a779d6220 329 * optimization on so that usable tables will be computed, or by
shoaib_ahmed 0:791a779d6220 330 * supplying default tables that are valid for the desired precision.)
shoaib_ahmed 0:791a779d6220 331 * Otherwise, use Huffman coding by default.
shoaib_ahmed 0:791a779d6220 332 */
shoaib_ahmed 0:791a779d6220 333 cinfo->arith_code = cinfo->data_precision > 8 ? TRUE : FALSE;
shoaib_ahmed 0:791a779d6220 334
shoaib_ahmed 0:791a779d6220 335 /* By default, don't do extra passes to optimize entropy coding */
shoaib_ahmed 0:791a779d6220 336 cinfo->optimize_coding = FALSE;
shoaib_ahmed 0:791a779d6220 337
shoaib_ahmed 0:791a779d6220 338 /* By default, use the simpler non-cosited sampling alignment */
shoaib_ahmed 0:791a779d6220 339 cinfo->CCIR601_sampling = FALSE;
shoaib_ahmed 0:791a779d6220 340
shoaib_ahmed 0:791a779d6220 341 /* By default, apply fancy downsampling */
shoaib_ahmed 0:791a779d6220 342 cinfo->do_fancy_downsampling = TRUE;
shoaib_ahmed 0:791a779d6220 343
shoaib_ahmed 0:791a779d6220 344 /* No input smoothing */
shoaib_ahmed 0:791a779d6220 345 cinfo->smoothing_factor = 0;
shoaib_ahmed 0:791a779d6220 346
shoaib_ahmed 0:791a779d6220 347 /* DCT algorithm preference */
shoaib_ahmed 0:791a779d6220 348 cinfo->dct_method = JDCT_DEFAULT;
shoaib_ahmed 0:791a779d6220 349
shoaib_ahmed 0:791a779d6220 350 /* No restart markers */
shoaib_ahmed 0:791a779d6220 351 cinfo->restart_interval = 0;
shoaib_ahmed 0:791a779d6220 352 cinfo->restart_in_rows = 0;
shoaib_ahmed 0:791a779d6220 353
shoaib_ahmed 0:791a779d6220 354 /* Fill in default JFIF marker parameters. Note that whether the marker
shoaib_ahmed 0:791a779d6220 355 * will actually be written is determined by jpeg_set_colorspace.
shoaib_ahmed 0:791a779d6220 356 *
shoaib_ahmed 0:791a779d6220 357 * By default, the library emits JFIF version code 1.01.
shoaib_ahmed 0:791a779d6220 358 * An application that wants to emit JFIF 1.02 extension markers should set
shoaib_ahmed 0:791a779d6220 359 * JFIF_minor_version to 2. We could probably get away with just defaulting
shoaib_ahmed 0:791a779d6220 360 * to 1.02, but there may still be some decoders in use that will complain
shoaib_ahmed 0:791a779d6220 361 * about that; saying 1.01 should minimize compatibility problems.
shoaib_ahmed 0:791a779d6220 362 *
shoaib_ahmed 0:791a779d6220 363 * For wide gamut colorspaces (BG_RGB and BG_YCC), the major version will be
shoaib_ahmed 0:791a779d6220 364 * overridden by jpeg_set_colorspace and set to 2.
shoaib_ahmed 0:791a779d6220 365 */
shoaib_ahmed 0:791a779d6220 366 cinfo->JFIF_major_version = 1; /* Default JFIF version = 1.01 */
shoaib_ahmed 0:791a779d6220 367 cinfo->JFIF_minor_version = 1;
shoaib_ahmed 0:791a779d6220 368 cinfo->density_unit = 0; /* Pixel size is unknown by default */
shoaib_ahmed 0:791a779d6220 369 cinfo->X_density = 1; /* Pixel aspect ratio is square by default */
shoaib_ahmed 0:791a779d6220 370 cinfo->Y_density = 1;
shoaib_ahmed 0:791a779d6220 371
shoaib_ahmed 0:791a779d6220 372 /* No color transform */
shoaib_ahmed 0:791a779d6220 373 cinfo->color_transform = JCT_NONE;
shoaib_ahmed 0:791a779d6220 374
shoaib_ahmed 0:791a779d6220 375 /* Choose JPEG colorspace based on input space, set defaults accordingly */
shoaib_ahmed 0:791a779d6220 376
shoaib_ahmed 0:791a779d6220 377 jpeg_default_colorspace(cinfo);
shoaib_ahmed 0:791a779d6220 378 }
shoaib_ahmed 0:791a779d6220 379
shoaib_ahmed 0:791a779d6220 380
shoaib_ahmed 0:791a779d6220 381 /*
shoaib_ahmed 0:791a779d6220 382 * Select an appropriate JPEG colorspace for in_color_space.
shoaib_ahmed 0:791a779d6220 383 */
shoaib_ahmed 0:791a779d6220 384
shoaib_ahmed 0:791a779d6220 385 GLOBAL(void)
shoaib_ahmed 0:791a779d6220 386 jpeg_default_colorspace (j_compress_ptr cinfo)
shoaib_ahmed 0:791a779d6220 387 {
shoaib_ahmed 0:791a779d6220 388 switch (cinfo->in_color_space) {
shoaib_ahmed 0:791a779d6220 389 case JCS_UNKNOWN:
shoaib_ahmed 0:791a779d6220 390 jpeg_set_colorspace(cinfo, JCS_UNKNOWN);
shoaib_ahmed 0:791a779d6220 391 break;
shoaib_ahmed 0:791a779d6220 392 case JCS_GRAYSCALE:
shoaib_ahmed 0:791a779d6220 393 jpeg_set_colorspace(cinfo, JCS_GRAYSCALE);
shoaib_ahmed 0:791a779d6220 394 break;
shoaib_ahmed 0:791a779d6220 395 case JCS_RGB:
shoaib_ahmed 0:791a779d6220 396 jpeg_set_colorspace(cinfo, JCS_YCbCr);
shoaib_ahmed 0:791a779d6220 397 break;
shoaib_ahmed 0:791a779d6220 398 case JCS_YCbCr:
shoaib_ahmed 0:791a779d6220 399 jpeg_set_colorspace(cinfo, JCS_YCbCr);
shoaib_ahmed 0:791a779d6220 400 break;
shoaib_ahmed 0:791a779d6220 401 case JCS_CMYK:
shoaib_ahmed 0:791a779d6220 402 jpeg_set_colorspace(cinfo, JCS_CMYK); /* By default, no translation */
shoaib_ahmed 0:791a779d6220 403 break;
shoaib_ahmed 0:791a779d6220 404 case JCS_YCCK:
shoaib_ahmed 0:791a779d6220 405 jpeg_set_colorspace(cinfo, JCS_YCCK);
shoaib_ahmed 0:791a779d6220 406 break;
shoaib_ahmed 0:791a779d6220 407 case JCS_BG_RGB:
shoaib_ahmed 0:791a779d6220 408 /* No translation for now -- conversion to BG_YCC not yet supportet */
shoaib_ahmed 0:791a779d6220 409 jpeg_set_colorspace(cinfo, JCS_BG_RGB);
shoaib_ahmed 0:791a779d6220 410 break;
shoaib_ahmed 0:791a779d6220 411 case JCS_BG_YCC:
shoaib_ahmed 0:791a779d6220 412 jpeg_set_colorspace(cinfo, JCS_BG_YCC);
shoaib_ahmed 0:791a779d6220 413 break;
shoaib_ahmed 0:791a779d6220 414 default:
shoaib_ahmed 0:791a779d6220 415 ERREXIT(cinfo, JERR_BAD_IN_COLORSPACE);
shoaib_ahmed 0:791a779d6220 416 }
shoaib_ahmed 0:791a779d6220 417 }
shoaib_ahmed 0:791a779d6220 418
shoaib_ahmed 0:791a779d6220 419
shoaib_ahmed 0:791a779d6220 420 /*
shoaib_ahmed 0:791a779d6220 421 * Set the JPEG colorspace, and choose colorspace-dependent default values.
shoaib_ahmed 0:791a779d6220 422 */
shoaib_ahmed 0:791a779d6220 423
shoaib_ahmed 0:791a779d6220 424 GLOBAL(void)
shoaib_ahmed 0:791a779d6220 425 jpeg_set_colorspace (j_compress_ptr cinfo, J_COLOR_SPACE colorspace)
shoaib_ahmed 0:791a779d6220 426 {
shoaib_ahmed 0:791a779d6220 427 jpeg_component_info * compptr;
shoaib_ahmed 0:791a779d6220 428 int ci;
shoaib_ahmed 0:791a779d6220 429
shoaib_ahmed 0:791a779d6220 430 #define SET_COMP(index,id,hsamp,vsamp,quant,dctbl,actbl) \
shoaib_ahmed 0:791a779d6220 431 (compptr = &cinfo->comp_info[index], \
shoaib_ahmed 0:791a779d6220 432 compptr->component_id = (id), \
shoaib_ahmed 0:791a779d6220 433 compptr->h_samp_factor = (hsamp), \
shoaib_ahmed 0:791a779d6220 434 compptr->v_samp_factor = (vsamp), \
shoaib_ahmed 0:791a779d6220 435 compptr->quant_tbl_no = (quant), \
shoaib_ahmed 0:791a779d6220 436 compptr->dc_tbl_no = (dctbl), \
shoaib_ahmed 0:791a779d6220 437 compptr->ac_tbl_no = (actbl) )
shoaib_ahmed 0:791a779d6220 438
shoaib_ahmed 0:791a779d6220 439 /* Safety check to ensure start_compress not called yet. */
shoaib_ahmed 0:791a779d6220 440 if (cinfo->global_state != CSTATE_START)
shoaib_ahmed 0:791a779d6220 441 ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
shoaib_ahmed 0:791a779d6220 442
shoaib_ahmed 0:791a779d6220 443 /* For all colorspaces, we use Q and Huff tables 0 for luminance components,
shoaib_ahmed 0:791a779d6220 444 * tables 1 for chrominance components.
shoaib_ahmed 0:791a779d6220 445 */
shoaib_ahmed 0:791a779d6220 446
shoaib_ahmed 0:791a779d6220 447 cinfo->jpeg_color_space = colorspace;
shoaib_ahmed 0:791a779d6220 448
shoaib_ahmed 0:791a779d6220 449 cinfo->write_JFIF_header = FALSE; /* No marker for non-JFIF colorspaces */
shoaib_ahmed 0:791a779d6220 450 cinfo->write_Adobe_marker = FALSE; /* write no Adobe marker by default */
shoaib_ahmed 0:791a779d6220 451
shoaib_ahmed 0:791a779d6220 452 switch (colorspace) {
shoaib_ahmed 0:791a779d6220 453 case JCS_UNKNOWN:
shoaib_ahmed 0:791a779d6220 454 cinfo->num_components = cinfo->input_components;
shoaib_ahmed 0:791a779d6220 455 if (cinfo->num_components < 1 || cinfo->num_components > MAX_COMPONENTS)
shoaib_ahmed 0:791a779d6220 456 ERREXIT2(cinfo, JERR_COMPONENT_COUNT, cinfo->num_components,
shoaib_ahmed 0:791a779d6220 457 MAX_COMPONENTS);
shoaib_ahmed 0:791a779d6220 458 for (ci = 0; ci < cinfo->num_components; ci++) {
shoaib_ahmed 0:791a779d6220 459 SET_COMP(ci, ci, 1,1, 0, 0,0);
shoaib_ahmed 0:791a779d6220 460 }
shoaib_ahmed 0:791a779d6220 461 break;
shoaib_ahmed 0:791a779d6220 462 case JCS_GRAYSCALE:
shoaib_ahmed 0:791a779d6220 463 cinfo->write_JFIF_header = TRUE; /* Write a JFIF marker */
shoaib_ahmed 0:791a779d6220 464 cinfo->num_components = 1;
shoaib_ahmed 0:791a779d6220 465 /* JFIF specifies component ID 1 */
shoaib_ahmed 0:791a779d6220 466 SET_COMP(0, 0x01, 1,1, 0, 0,0);
shoaib_ahmed 0:791a779d6220 467 break;
shoaib_ahmed 0:791a779d6220 468 case JCS_RGB:
shoaib_ahmed 0:791a779d6220 469 cinfo->write_Adobe_marker = TRUE; /* write Adobe marker to flag RGB */
shoaib_ahmed 0:791a779d6220 470 cinfo->num_components = 3;
shoaib_ahmed 0:791a779d6220 471 SET_COMP(0, 0x52 /* 'R' */, 1,1, 0,
shoaib_ahmed 0:791a779d6220 472 cinfo->color_transform == JCT_SUBTRACT_GREEN ? 1 : 0,
shoaib_ahmed 0:791a779d6220 473 cinfo->color_transform == JCT_SUBTRACT_GREEN ? 1 : 0);
shoaib_ahmed 0:791a779d6220 474 SET_COMP(1, 0x47 /* 'G' */, 1,1, 0, 0,0);
shoaib_ahmed 0:791a779d6220 475 SET_COMP(2, 0x42 /* 'B' */, 1,1, 0,
shoaib_ahmed 0:791a779d6220 476 cinfo->color_transform == JCT_SUBTRACT_GREEN ? 1 : 0,
shoaib_ahmed 0:791a779d6220 477 cinfo->color_transform == JCT_SUBTRACT_GREEN ? 1 : 0);
shoaib_ahmed 0:791a779d6220 478 break;
shoaib_ahmed 0:791a779d6220 479 case JCS_YCbCr:
shoaib_ahmed 0:791a779d6220 480 cinfo->write_JFIF_header = TRUE; /* Write a JFIF marker */
shoaib_ahmed 0:791a779d6220 481 cinfo->num_components = 3;
shoaib_ahmed 0:791a779d6220 482 /* JFIF specifies component IDs 1,2,3 */
shoaib_ahmed 0:791a779d6220 483 /* We default to 2x2 subsamples of chrominance */
shoaib_ahmed 0:791a779d6220 484 SET_COMP(0, 0x01, 2,2, 0, 0,0);
shoaib_ahmed 0:791a779d6220 485 SET_COMP(1, 0x02, 1,1, 1, 1,1);
shoaib_ahmed 0:791a779d6220 486 SET_COMP(2, 0x03, 1,1, 1, 1,1);
shoaib_ahmed 0:791a779d6220 487 break;
shoaib_ahmed 0:791a779d6220 488 case JCS_CMYK:
shoaib_ahmed 0:791a779d6220 489 cinfo->write_Adobe_marker = TRUE; /* write Adobe marker to flag CMYK */
shoaib_ahmed 0:791a779d6220 490 cinfo->num_components = 4;
shoaib_ahmed 0:791a779d6220 491 SET_COMP(0, 0x43 /* 'C' */, 1,1, 0, 0,0);
shoaib_ahmed 0:791a779d6220 492 SET_COMP(1, 0x4D /* 'M' */, 1,1, 0, 0,0);
shoaib_ahmed 0:791a779d6220 493 SET_COMP(2, 0x59 /* 'Y' */, 1,1, 0, 0,0);
shoaib_ahmed 0:791a779d6220 494 SET_COMP(3, 0x4B /* 'K' */, 1,1, 0, 0,0);
shoaib_ahmed 0:791a779d6220 495 break;
shoaib_ahmed 0:791a779d6220 496 case JCS_YCCK:
shoaib_ahmed 0:791a779d6220 497 cinfo->write_Adobe_marker = TRUE; /* write Adobe marker to flag YCCK */
shoaib_ahmed 0:791a779d6220 498 cinfo->num_components = 4;
shoaib_ahmed 0:791a779d6220 499 SET_COMP(0, 0x01, 2,2, 0, 0,0);
shoaib_ahmed 0:791a779d6220 500 SET_COMP(1, 0x02, 1,1, 1, 1,1);
shoaib_ahmed 0:791a779d6220 501 SET_COMP(2, 0x03, 1,1, 1, 1,1);
shoaib_ahmed 0:791a779d6220 502 SET_COMP(3, 0x04, 2,2, 0, 0,0);
shoaib_ahmed 0:791a779d6220 503 break;
shoaib_ahmed 0:791a779d6220 504 case JCS_BG_RGB:
shoaib_ahmed 0:791a779d6220 505 cinfo->write_JFIF_header = TRUE; /* Write a JFIF marker */
shoaib_ahmed 0:791a779d6220 506 cinfo->JFIF_major_version = 2; /* Set JFIF major version = 2 */
shoaib_ahmed 0:791a779d6220 507 cinfo->num_components = 3;
shoaib_ahmed 0:791a779d6220 508 /* Add offset 0x20 to the normal R/G/B component IDs */
shoaib_ahmed 0:791a779d6220 509 SET_COMP(0, 0x72 /* 'r' */, 1,1, 0,
shoaib_ahmed 0:791a779d6220 510 cinfo->color_transform == JCT_SUBTRACT_GREEN ? 1 : 0,
shoaib_ahmed 0:791a779d6220 511 cinfo->color_transform == JCT_SUBTRACT_GREEN ? 1 : 0);
shoaib_ahmed 0:791a779d6220 512 SET_COMP(1, 0x67 /* 'g' */, 1,1, 0, 0,0);
shoaib_ahmed 0:791a779d6220 513 SET_COMP(2, 0x62 /* 'b' */, 1,1, 0,
shoaib_ahmed 0:791a779d6220 514 cinfo->color_transform == JCT_SUBTRACT_GREEN ? 1 : 0,
shoaib_ahmed 0:791a779d6220 515 cinfo->color_transform == JCT_SUBTRACT_GREEN ? 1 : 0);
shoaib_ahmed 0:791a779d6220 516 break;
shoaib_ahmed 0:791a779d6220 517 case JCS_BG_YCC:
shoaib_ahmed 0:791a779d6220 518 cinfo->write_JFIF_header = TRUE; /* Write a JFIF marker */
shoaib_ahmed 0:791a779d6220 519 cinfo->JFIF_major_version = 2; /* Set JFIF major version = 2 */
shoaib_ahmed 0:791a779d6220 520 cinfo->num_components = 3;
shoaib_ahmed 0:791a779d6220 521 /* Add offset 0x20 to the normal Cb/Cr component IDs */
shoaib_ahmed 0:791a779d6220 522 /* We default to 2x2 subsamples of chrominance */
shoaib_ahmed 0:791a779d6220 523 SET_COMP(0, 0x01, 2,2, 0, 0,0);
shoaib_ahmed 0:791a779d6220 524 SET_COMP(1, 0x22, 1,1, 1, 1,1);
shoaib_ahmed 0:791a779d6220 525 SET_COMP(2, 0x23, 1,1, 1, 1,1);
shoaib_ahmed 0:791a779d6220 526 break;
shoaib_ahmed 0:791a779d6220 527 default:
shoaib_ahmed 0:791a779d6220 528 ERREXIT(cinfo, JERR_BAD_J_COLORSPACE);
shoaib_ahmed 0:791a779d6220 529 }
shoaib_ahmed 0:791a779d6220 530 }
shoaib_ahmed 0:791a779d6220 531
shoaib_ahmed 0:791a779d6220 532
shoaib_ahmed 0:791a779d6220 533 #ifdef C_PROGRESSIVE_SUPPORTED
shoaib_ahmed 0:791a779d6220 534
shoaib_ahmed 0:791a779d6220 535 LOCAL(jpeg_scan_info *)
shoaib_ahmed 0:791a779d6220 536 fill_a_scan (jpeg_scan_info * scanptr, int ci,
shoaib_ahmed 0:791a779d6220 537 int Ss, int Se, int Ah, int Al)
shoaib_ahmed 0:791a779d6220 538 /* Support routine: generate one scan for specified component */
shoaib_ahmed 0:791a779d6220 539 {
shoaib_ahmed 0:791a779d6220 540 scanptr->comps_in_scan = 1;
shoaib_ahmed 0:791a779d6220 541 scanptr->component_index[0] = ci;
shoaib_ahmed 0:791a779d6220 542 scanptr->Ss = Ss;
shoaib_ahmed 0:791a779d6220 543 scanptr->Se = Se;
shoaib_ahmed 0:791a779d6220 544 scanptr->Ah = Ah;
shoaib_ahmed 0:791a779d6220 545 scanptr->Al = Al;
shoaib_ahmed 0:791a779d6220 546 scanptr++;
shoaib_ahmed 0:791a779d6220 547 return scanptr;
shoaib_ahmed 0:791a779d6220 548 }
shoaib_ahmed 0:791a779d6220 549
shoaib_ahmed 0:791a779d6220 550 LOCAL(jpeg_scan_info *)
shoaib_ahmed 0:791a779d6220 551 fill_scans (jpeg_scan_info * scanptr, int ncomps,
shoaib_ahmed 0:791a779d6220 552 int Ss, int Se, int Ah, int Al)
shoaib_ahmed 0:791a779d6220 553 /* Support routine: generate one scan for each component */
shoaib_ahmed 0:791a779d6220 554 {
shoaib_ahmed 0:791a779d6220 555 int ci;
shoaib_ahmed 0:791a779d6220 556
shoaib_ahmed 0:791a779d6220 557 for (ci = 0; ci < ncomps; ci++) {
shoaib_ahmed 0:791a779d6220 558 scanptr->comps_in_scan = 1;
shoaib_ahmed 0:791a779d6220 559 scanptr->component_index[0] = ci;
shoaib_ahmed 0:791a779d6220 560 scanptr->Ss = Ss;
shoaib_ahmed 0:791a779d6220 561 scanptr->Se = Se;
shoaib_ahmed 0:791a779d6220 562 scanptr->Ah = Ah;
shoaib_ahmed 0:791a779d6220 563 scanptr->Al = Al;
shoaib_ahmed 0:791a779d6220 564 scanptr++;
shoaib_ahmed 0:791a779d6220 565 }
shoaib_ahmed 0:791a779d6220 566 return scanptr;
shoaib_ahmed 0:791a779d6220 567 }
shoaib_ahmed 0:791a779d6220 568
shoaib_ahmed 0:791a779d6220 569 LOCAL(jpeg_scan_info *)
shoaib_ahmed 0:791a779d6220 570 fill_dc_scans (jpeg_scan_info * scanptr, int ncomps, int Ah, int Al)
shoaib_ahmed 0:791a779d6220 571 /* Support routine: generate interleaved DC scan if possible, else N scans */
shoaib_ahmed 0:791a779d6220 572 {
shoaib_ahmed 0:791a779d6220 573 int ci;
shoaib_ahmed 0:791a779d6220 574
shoaib_ahmed 0:791a779d6220 575 if (ncomps <= MAX_COMPS_IN_SCAN) {
shoaib_ahmed 0:791a779d6220 576 /* Single interleaved DC scan */
shoaib_ahmed 0:791a779d6220 577 scanptr->comps_in_scan = ncomps;
shoaib_ahmed 0:791a779d6220 578 for (ci = 0; ci < ncomps; ci++)
shoaib_ahmed 0:791a779d6220 579 scanptr->component_index[ci] = ci;
shoaib_ahmed 0:791a779d6220 580 scanptr->Ss = scanptr->Se = 0;
shoaib_ahmed 0:791a779d6220 581 scanptr->Ah = Ah;
shoaib_ahmed 0:791a779d6220 582 scanptr->Al = Al;
shoaib_ahmed 0:791a779d6220 583 scanptr++;
shoaib_ahmed 0:791a779d6220 584 } else {
shoaib_ahmed 0:791a779d6220 585 /* Noninterleaved DC scan for each component */
shoaib_ahmed 0:791a779d6220 586 scanptr = fill_scans(scanptr, ncomps, 0, 0, Ah, Al);
shoaib_ahmed 0:791a779d6220 587 }
shoaib_ahmed 0:791a779d6220 588 return scanptr;
shoaib_ahmed 0:791a779d6220 589 }
shoaib_ahmed 0:791a779d6220 590
shoaib_ahmed 0:791a779d6220 591
shoaib_ahmed 0:791a779d6220 592 /*
shoaib_ahmed 0:791a779d6220 593 * Create a recommended progressive-JPEG script.
shoaib_ahmed 0:791a779d6220 594 * cinfo->num_components and cinfo->jpeg_color_space must be correct.
shoaib_ahmed 0:791a779d6220 595 */
shoaib_ahmed 0:791a779d6220 596
shoaib_ahmed 0:791a779d6220 597 GLOBAL(void)
shoaib_ahmed 0:791a779d6220 598 jpeg_simple_progression (j_compress_ptr cinfo)
shoaib_ahmed 0:791a779d6220 599 {
shoaib_ahmed 0:791a779d6220 600 int ncomps = cinfo->num_components;
shoaib_ahmed 0:791a779d6220 601 int nscans;
shoaib_ahmed 0:791a779d6220 602 jpeg_scan_info * scanptr;
shoaib_ahmed 0:791a779d6220 603
shoaib_ahmed 0:791a779d6220 604 /* Safety check to ensure start_compress not called yet. */
shoaib_ahmed 0:791a779d6220 605 if (cinfo->global_state != CSTATE_START)
shoaib_ahmed 0:791a779d6220 606 ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
shoaib_ahmed 0:791a779d6220 607
shoaib_ahmed 0:791a779d6220 608 /* Figure space needed for script. Calculation must match code below! */
shoaib_ahmed 0:791a779d6220 609 if (ncomps == 3 &&
shoaib_ahmed 0:791a779d6220 610 (cinfo->jpeg_color_space == JCS_YCbCr ||
shoaib_ahmed 0:791a779d6220 611 cinfo->jpeg_color_space == JCS_BG_YCC)) {
shoaib_ahmed 0:791a779d6220 612 /* Custom script for YCC color images. */
shoaib_ahmed 0:791a779d6220 613 nscans = 10;
shoaib_ahmed 0:791a779d6220 614 } else {
shoaib_ahmed 0:791a779d6220 615 /* All-purpose script for other color spaces. */
shoaib_ahmed 0:791a779d6220 616 if (ncomps > MAX_COMPS_IN_SCAN)
shoaib_ahmed 0:791a779d6220 617 nscans = 6 * ncomps; /* 2 DC + 4 AC scans per component */
shoaib_ahmed 0:791a779d6220 618 else
shoaib_ahmed 0:791a779d6220 619 nscans = 2 + 4 * ncomps; /* 2 DC scans; 4 AC scans per component */
shoaib_ahmed 0:791a779d6220 620 }
shoaib_ahmed 0:791a779d6220 621
shoaib_ahmed 0:791a779d6220 622 /* Allocate space for script.
shoaib_ahmed 0:791a779d6220 623 * We need to put it in the permanent pool in case the application performs
shoaib_ahmed 0:791a779d6220 624 * multiple compressions without changing the settings. To avoid a memory
shoaib_ahmed 0:791a779d6220 625 * leak if jpeg_simple_progression is called repeatedly for the same JPEG
shoaib_ahmed 0:791a779d6220 626 * object, we try to re-use previously allocated space, and we allocate
shoaib_ahmed 0:791a779d6220 627 * enough space to handle YCC even if initially asked for grayscale.
shoaib_ahmed 0:791a779d6220 628 */
shoaib_ahmed 0:791a779d6220 629 if (cinfo->script_space == NULL || cinfo->script_space_size < nscans) {
shoaib_ahmed 0:791a779d6220 630 cinfo->script_space_size = MAX(nscans, 10);
shoaib_ahmed 0:791a779d6220 631 cinfo->script_space = (jpeg_scan_info *)
shoaib_ahmed 0:791a779d6220 632 (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_PERMANENT,
shoaib_ahmed 0:791a779d6220 633 cinfo->script_space_size * SIZEOF(jpeg_scan_info));
shoaib_ahmed 0:791a779d6220 634 }
shoaib_ahmed 0:791a779d6220 635 scanptr = cinfo->script_space;
shoaib_ahmed 0:791a779d6220 636 cinfo->scan_info = scanptr;
shoaib_ahmed 0:791a779d6220 637 cinfo->num_scans = nscans;
shoaib_ahmed 0:791a779d6220 638
shoaib_ahmed 0:791a779d6220 639 if (ncomps == 3 &&
shoaib_ahmed 0:791a779d6220 640 (cinfo->jpeg_color_space == JCS_YCbCr ||
shoaib_ahmed 0:791a779d6220 641 cinfo->jpeg_color_space == JCS_BG_YCC)) {
shoaib_ahmed 0:791a779d6220 642 /* Custom script for YCC color images. */
shoaib_ahmed 0:791a779d6220 643 /* Initial DC scan */
shoaib_ahmed 0:791a779d6220 644 scanptr = fill_dc_scans(scanptr, ncomps, 0, 1);
shoaib_ahmed 0:791a779d6220 645 /* Initial AC scan: get some luma data out in a hurry */
shoaib_ahmed 0:791a779d6220 646 scanptr = fill_a_scan(scanptr, 0, 1, 5, 0, 2);
shoaib_ahmed 0:791a779d6220 647 /* Chroma data is too small to be worth expending many scans on */
shoaib_ahmed 0:791a779d6220 648 scanptr = fill_a_scan(scanptr, 2, 1, 63, 0, 1);
shoaib_ahmed 0:791a779d6220 649 scanptr = fill_a_scan(scanptr, 1, 1, 63, 0, 1);
shoaib_ahmed 0:791a779d6220 650 /* Complete spectral selection for luma AC */
shoaib_ahmed 0:791a779d6220 651 scanptr = fill_a_scan(scanptr, 0, 6, 63, 0, 2);
shoaib_ahmed 0:791a779d6220 652 /* Refine next bit of luma AC */
shoaib_ahmed 0:791a779d6220 653 scanptr = fill_a_scan(scanptr, 0, 1, 63, 2, 1);
shoaib_ahmed 0:791a779d6220 654 /* Finish DC successive approximation */
shoaib_ahmed 0:791a779d6220 655 scanptr = fill_dc_scans(scanptr, ncomps, 1, 0);
shoaib_ahmed 0:791a779d6220 656 /* Finish AC successive approximation */
shoaib_ahmed 0:791a779d6220 657 scanptr = fill_a_scan(scanptr, 2, 1, 63, 1, 0);
shoaib_ahmed 0:791a779d6220 658 scanptr = fill_a_scan(scanptr, 1, 1, 63, 1, 0);
shoaib_ahmed 0:791a779d6220 659 /* Luma bottom bit comes last since it's usually largest scan */
shoaib_ahmed 0:791a779d6220 660 scanptr = fill_a_scan(scanptr, 0, 1, 63, 1, 0);
shoaib_ahmed 0:791a779d6220 661 } else {
shoaib_ahmed 0:791a779d6220 662 /* All-purpose script for other color spaces. */
shoaib_ahmed 0:791a779d6220 663 /* Successive approximation first pass */
shoaib_ahmed 0:791a779d6220 664 scanptr = fill_dc_scans(scanptr, ncomps, 0, 1);
shoaib_ahmed 0:791a779d6220 665 scanptr = fill_scans(scanptr, ncomps, 1, 5, 0, 2);
shoaib_ahmed 0:791a779d6220 666 scanptr = fill_scans(scanptr, ncomps, 6, 63, 0, 2);
shoaib_ahmed 0:791a779d6220 667 /* Successive approximation second pass */
shoaib_ahmed 0:791a779d6220 668 scanptr = fill_scans(scanptr, ncomps, 1, 63, 2, 1);
shoaib_ahmed 0:791a779d6220 669 /* Successive approximation final pass */
shoaib_ahmed 0:791a779d6220 670 scanptr = fill_dc_scans(scanptr, ncomps, 1, 0);
shoaib_ahmed 0:791a779d6220 671 scanptr = fill_scans(scanptr, ncomps, 1, 63, 1, 0);
shoaib_ahmed 0:791a779d6220 672 }
shoaib_ahmed 0:791a779d6220 673 }
shoaib_ahmed 0:791a779d6220 674
shoaib_ahmed 0:791a779d6220 675 #endif /* C_PROGRESSIVE_SUPPORTED */