1/* 2 * jcmarker.c 3 * 4 * Copyright (C) 1991-1998, Thomas G. Lane. 5 * Modified 2003-2009 by Guido Vollbeding. 6 * This file is part of the Independent JPEG Group's software. 7 * For conditions of distribution and use, see the accompanying README file. 8 * 9 * This file contains routines to write JPEG datastream markers. 10 */ 11 12#define JPEG_INTERNALS 13#include "jinclude.h" 14#include "jpeglib.h" 15 16 17typedef enum { /* JPEG marker codes */ 18 M_SOF0 = 0xc0, 19 M_SOF1 = 0xc1, 20 M_SOF2 = 0xc2, 21 M_SOF3 = 0xc3, 22 23 M_SOF5 = 0xc5, 24 M_SOF6 = 0xc6, 25 M_SOF7 = 0xc7, 26 27 M_JPG = 0xc8, 28 M_SOF9 = 0xc9, 29 M_SOF10 = 0xca, 30 M_SOF11 = 0xcb, 31 32 M_SOF13 = 0xcd, 33 M_SOF14 = 0xce, 34 M_SOF15 = 0xcf, 35 36 M_DHT = 0xc4, 37 38 M_DAC = 0xcc, 39 40 M_RST0 = 0xd0, 41 M_RST1 = 0xd1, 42 M_RST2 = 0xd2, 43 M_RST3 = 0xd3, 44 M_RST4 = 0xd4, 45 M_RST5 = 0xd5, 46 M_RST6 = 0xd6, 47 M_RST7 = 0xd7, 48 49 M_SOI = 0xd8, 50 M_EOI = 0xd9, 51 M_SOS = 0xda, 52 M_DQT = 0xdb, 53 M_DNL = 0xdc, 54 M_DRI = 0xdd, 55 M_DHP = 0xde, 56 M_EXP = 0xdf, 57 58 M_APP0 = 0xe0, 59 M_APP1 = 0xe1, 60 M_APP2 = 0xe2, 61 M_APP3 = 0xe3, 62 M_APP4 = 0xe4, 63 M_APP5 = 0xe5, 64 M_APP6 = 0xe6, 65 M_APP7 = 0xe7, 66 M_APP8 = 0xe8, 67 M_APP9 = 0xe9, 68 M_APP10 = 0xea, 69 M_APP11 = 0xeb, 70 M_APP12 = 0xec, 71 M_APP13 = 0xed, 72 M_APP14 = 0xee, 73 M_APP15 = 0xef, 74 75 M_JPG0 = 0xf0, 76 M_JPG13 = 0xfd, 77 M_COM = 0xfe, 78 79 M_TEM = 0x01, 80 81 M_ERROR = 0x100 82} JPEG_MARKER; 83 84 85/* Private state */ 86 87typedef struct { 88 struct jpeg_marker_writer pub; /* public fields */ 89 90 unsigned int last_restart_interval; /* last DRI value emitted; 0 after SOI */ 91} my_marker_writer; 92 93typedef my_marker_writer * my_marker_ptr; 94 95 96/* 97 * Basic output routines. 98 * 99 * Note that we do not support suspension while writing a marker. 100 * Therefore, an application using suspension must ensure that there is 101 * enough buffer space for the initial markers (typ. 600-700 bytes) before 102 * calling jpeg_start_compress, and enough space to write the trailing EOI 103 * (a few bytes) before calling jpeg_finish_compress. Multipass compression 104 * modes are not supported at all with suspension, so those two are the only 105 * points where markers will be written. 106 */ 107 108LOCAL(void) 109emit_byte (j_compress_ptr cinfo, int val) 110/* Emit a byte */ 111{ 112 struct jpeg_destination_mgr * dest = cinfo->dest; 113 114 *(dest->next_output_byte)++ = (JOCTET) val; 115 if (--dest->free_in_buffer == 0) { 116 if (! (*dest->empty_output_buffer) (cinfo)) 117 ERREXIT(cinfo, JERR_CANT_SUSPEND); 118 } 119} 120 121 122LOCAL(void) 123emit_marker (j_compress_ptr cinfo, JPEG_MARKER mark) 124/* Emit a marker code */ 125{ 126 emit_byte(cinfo, 0xFF); 127 emit_byte(cinfo, (int) mark); 128} 129 130 131LOCAL(void) 132emit_2bytes (j_compress_ptr cinfo, int value) 133/* Emit a 2-byte integer; these are always MSB first in JPEG files */ 134{ 135 emit_byte(cinfo, (value >> 8) & 0xFF); 136 emit_byte(cinfo, value & 0xFF); 137} 138 139 140/* 141 * Routines to write specific marker types. 142 */ 143 144LOCAL(int) 145emit_dqt (j_compress_ptr cinfo, int index) 146/* Emit a DQT marker */ 147/* Returns the precision used (0 = 8bits, 1 = 16bits) for baseline checking */ 148{ 149 JQUANT_TBL * qtbl = cinfo->quant_tbl_ptrs[index]; 150 int prec; 151 int i; 152 153 if (qtbl == NULL) 154 ERREXIT1(cinfo, JERR_NO_QUANT_TABLE, index); 155 156 prec = 0; 157 for (i = 0; i <= cinfo->lim_Se; i++) { 158 if (qtbl->quantval[cinfo->natural_order[i]] > 255) 159 prec = 1; 160 } 161 162 if (! qtbl->sent_table) { 163 emit_marker(cinfo, M_DQT); 164 165 emit_2bytes(cinfo, 166 prec ? cinfo->lim_Se * 2 + 2 + 1 + 2 : cinfo->lim_Se + 1 + 1 + 2); 167 168 emit_byte(cinfo, index + (prec<<4)); 169 170 for (i = 0; i <= cinfo->lim_Se; i++) { 171 /* The table entries must be emitted in zigzag order. */ 172 unsigned int qval = qtbl->quantval[cinfo->natural_order[i]]; 173 if (prec) 174 emit_byte(cinfo, (int) (qval >> 8)); 175 emit_byte(cinfo, (int) (qval & 0xFF)); 176 } 177 178 qtbl->sent_table = TRUE; 179 } 180 181 return prec; 182} 183 184 185LOCAL(void) 186emit_dht (j_compress_ptr cinfo, int index, boolean is_ac) 187/* Emit a DHT marker */ 188{ 189 JHUFF_TBL * htbl; 190 int length, i; 191 192 if (is_ac) { 193 htbl = cinfo->ac_huff_tbl_ptrs[index]; 194 index += 0x10; /* output index has AC bit set */ 195 } else { 196 htbl = cinfo->dc_huff_tbl_ptrs[index]; 197 } 198 199 if (htbl == NULL) 200 ERREXIT1(cinfo, JERR_NO_HUFF_TABLE, index); 201 202 if (! htbl->sent_table) { 203 emit_marker(cinfo, M_DHT); 204 205 length = 0; 206 for (i = 1; i <= 16; i++) 207 length += htbl->bits[i]; 208 209 emit_2bytes(cinfo, length + 2 + 1 + 16); 210 emit_byte(cinfo, index); 211 212 for (i = 1; i <= 16; i++) 213 emit_byte(cinfo, htbl->bits[i]); 214 215 for (i = 0; i < length; i++) 216 emit_byte(cinfo, htbl->huffval[i]); 217 218 htbl->sent_table = TRUE; 219 } 220} 221 222 223LOCAL(void) 224emit_dac (j_compress_ptr cinfo) 225/* Emit a DAC marker */ 226/* Since the useful info is so small, we want to emit all the tables in */ 227/* one DAC marker. Therefore this routine does its own scan of the table. */ 228{ 229#ifdef C_ARITH_CODING_SUPPORTED 230 char dc_in_use[NUM_ARITH_TBLS]; 231 char ac_in_use[NUM_ARITH_TBLS]; 232 int length, i; 233 jpeg_component_info *compptr; 234 235 for (i = 0; i < NUM_ARITH_TBLS; i++) 236 dc_in_use[i] = ac_in_use[i] = 0; 237 238 for (i = 0; i < cinfo->comps_in_scan; i++) { 239 compptr = cinfo->cur_comp_info[i]; 240 /* DC needs no table for refinement scan */ 241 if (cinfo->Ss == 0 && cinfo->Ah == 0) 242 dc_in_use[compptr->dc_tbl_no] = 1; 243 /* AC needs no table when not present */ 244 if (cinfo->Se) 245 ac_in_use[compptr->ac_tbl_no] = 1; 246 } 247 248 length = 0; 249 for (i = 0; i < NUM_ARITH_TBLS; i++) 250 length += dc_in_use[i] + ac_in_use[i]; 251 252 emit_marker(cinfo, M_DAC); 253 254 emit_2bytes(cinfo, length*2 + 2); 255 256 for (i = 0; i < NUM_ARITH_TBLS; i++) { 257 if (dc_in_use[i]) { 258 emit_byte(cinfo, i); 259 emit_byte(cinfo, cinfo->arith_dc_L[i] + (cinfo->arith_dc_U[i]<<4)); 260 } 261 if (ac_in_use[i]) { 262 emit_byte(cinfo, i + 0x10); 263 emit_byte(cinfo, cinfo->arith_ac_K[i]); 264 } 265 } 266#endif /* C_ARITH_CODING_SUPPORTED */ 267} 268 269 270LOCAL(void) 271emit_dri (j_compress_ptr cinfo) 272/* Emit a DRI marker */ 273{ 274 emit_marker(cinfo, M_DRI); 275 276 emit_2bytes(cinfo, 4); /* fixed length */ 277 278 emit_2bytes(cinfo, (int) cinfo->restart_interval); 279} 280 281 282LOCAL(void) 283emit_sof (j_compress_ptr cinfo, JPEG_MARKER code) 284/* Emit a SOF marker */ 285{ 286 int ci; 287 jpeg_component_info *compptr; 288 289 emit_marker(cinfo, code); 290 291 emit_2bytes(cinfo, 3 * cinfo->num_components + 2 + 5 + 1); /* length */ 292 293 /* Make sure image isn't bigger than SOF field can handle */ 294 if ((long) cinfo->jpeg_height > 65535L || 295 (long) cinfo->jpeg_width > 65535L) 296 ERREXIT1(cinfo, JERR_IMAGE_TOO_BIG, (unsigned int) 65535); 297 298 emit_byte(cinfo, cinfo->data_precision); 299 emit_2bytes(cinfo, (int) cinfo->jpeg_height); 300 emit_2bytes(cinfo, (int) cinfo->jpeg_width); 301 302 emit_byte(cinfo, cinfo->num_components); 303 304 for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components; 305 ci++, compptr++) { 306 emit_byte(cinfo, compptr->component_id); 307 emit_byte(cinfo, (compptr->h_samp_factor << 4) + compptr->v_samp_factor); 308 emit_byte(cinfo, compptr->quant_tbl_no); 309 } 310} 311 312 313LOCAL(void) 314emit_sos (j_compress_ptr cinfo) 315/* Emit a SOS marker */ 316{ 317 int i, td, ta; 318 jpeg_component_info *compptr; 319 320 emit_marker(cinfo, M_SOS); 321 322 emit_2bytes(cinfo, 2 * cinfo->comps_in_scan + 2 + 1 + 3); /* length */ 323 324 emit_byte(cinfo, cinfo->comps_in_scan); 325 326 for (i = 0; i < cinfo->comps_in_scan; i++) { 327 compptr = cinfo->cur_comp_info[i]; 328 emit_byte(cinfo, compptr->component_id); 329 330 /* We emit 0 for unused field(s); this is recommended by the P&M text 331 * but does not seem to be specified in the standard. 332 */ 333 334 /* DC needs no table for refinement scan */ 335 td = cinfo->Ss == 0 && cinfo->Ah == 0 ? compptr->dc_tbl_no : 0; 336 /* AC needs no table when not present */ 337 ta = cinfo->Se ? compptr->ac_tbl_no : 0; 338 339 emit_byte(cinfo, (td << 4) + ta); 340 } 341 342 emit_byte(cinfo, cinfo->Ss); 343 emit_byte(cinfo, cinfo->Se); 344 emit_byte(cinfo, (cinfo->Ah << 4) + cinfo->Al); 345} 346 347 348LOCAL(void) 349emit_pseudo_sos (j_compress_ptr cinfo) 350/* Emit a pseudo SOS marker */ 351{ 352 emit_marker(cinfo, M_SOS); 353 354 emit_2bytes(cinfo, 2 + 1 + 3); /* length */ 355 356 emit_byte(cinfo, 0); /* Ns */ 357 358 emit_byte(cinfo, 0); /* Ss */ 359 emit_byte(cinfo, cinfo->block_size * cinfo->block_size - 1); /* Se */ 360 emit_byte(cinfo, 0); /* Ah/Al */ 361} 362 363 364LOCAL(void) 365emit_jfif_app0 (j_compress_ptr cinfo) 366/* Emit a JFIF-compliant APP0 marker */ 367{ 368 /* 369 * Length of APP0 block (2 bytes) 370 * Block ID (4 bytes - ASCII "JFIF") 371 * Zero byte (1 byte to terminate the ID string) 372 * Version Major, Minor (2 bytes - major first) 373 * Units (1 byte - 0x00 = none, 0x01 = inch, 0x02 = cm) 374 * Xdpu (2 bytes - dots per unit horizontal) 375 * Ydpu (2 bytes - dots per unit vertical) 376 * Thumbnail X size (1 byte) 377 * Thumbnail Y size (1 byte) 378 */ 379 380 emit_marker(cinfo, M_APP0); 381 382 emit_2bytes(cinfo, 2 + 4 + 1 + 2 + 1 + 2 + 2 + 1 + 1); /* length */ 383 384 emit_byte(cinfo, 0x4A); /* Identifier: ASCII "JFIF" */ 385 emit_byte(cinfo, 0x46); 386 emit_byte(cinfo, 0x49); 387 emit_byte(cinfo, 0x46); 388 emit_byte(cinfo, 0); 389 emit_byte(cinfo, cinfo->JFIF_major_version); /* Version fields */ 390 emit_byte(cinfo, cinfo->JFIF_minor_version); 391 emit_byte(cinfo, cinfo->density_unit); /* Pixel size information */ 392 emit_2bytes(cinfo, (int) cinfo->X_density); 393 emit_2bytes(cinfo, (int) cinfo->Y_density); 394 emit_byte(cinfo, 0); /* No thumbnail image */ 395 emit_byte(cinfo, 0); 396} 397 398 399LOCAL(void) 400emit_adobe_app14 (j_compress_ptr cinfo) 401/* Emit an Adobe APP14 marker */ 402{ 403 /* 404 * Length of APP14 block (2 bytes) 405 * Block ID (5 bytes - ASCII "Adobe") 406 * Version Number (2 bytes - currently 100) 407 * Flags0 (2 bytes - currently 0) 408 * Flags1 (2 bytes - currently 0) 409 * Color transform (1 byte) 410 * 411 * Although Adobe TN 5116 mentions Version = 101, all the Adobe files 412 * now in circulation seem to use Version = 100, so that's what we write. 413 * 414 * We write the color transform byte as 1 if the JPEG color space is 415 * YCbCr, 2 if it's YCCK, 0 otherwise. Adobe's definition has to do with 416 * whether the encoder performed a transformation, which is pretty useless. 417 */ 418 419 emit_marker(cinfo, M_APP14); 420 421 emit_2bytes(cinfo, 2 + 5 + 2 + 2 + 2 + 1); /* length */ 422 423 emit_byte(cinfo, 0x41); /* Identifier: ASCII "Adobe" */ 424 emit_byte(cinfo, 0x64); 425 emit_byte(cinfo, 0x6F); 426 emit_byte(cinfo, 0x62); 427 emit_byte(cinfo, 0x65); 428 emit_2bytes(cinfo, 100); /* Version */ 429 emit_2bytes(cinfo, 0); /* Flags0 */ 430 emit_2bytes(cinfo, 0); /* Flags1 */ 431 switch (cinfo->jpeg_color_space) { 432 case JCS_YCbCr: 433 emit_byte(cinfo, 1); /* Color transform = 1 */ 434 break; 435 case JCS_YCCK: 436 emit_byte(cinfo, 2); /* Color transform = 2 */ 437 break; 438 default: 439 emit_byte(cinfo, 0); /* Color transform = 0 */ 440 break; 441 } 442} 443 444 445/* 446 * These routines allow writing an arbitrary marker with parameters. 447 * The only intended use is to emit COM or APPn markers after calling 448 * write_file_header and before calling write_frame_header. 449 * Other uses are not guaranteed to produce desirable results. 450 * Counting the parameter bytes properly is the caller's responsibility. 451 */ 452 453METHODDEF(void) 454write_marker_header (j_compress_ptr cinfo, int marker, unsigned int datalen) 455/* Emit an arbitrary marker header */ 456{ 457 if (datalen > (unsigned int) 65533) /* safety check */ 458 ERREXIT(cinfo, JERR_BAD_LENGTH); 459 460 emit_marker(cinfo, (JPEG_MARKER) marker); 461 462 emit_2bytes(cinfo, (int) (datalen + 2)); /* total length */ 463} 464 465METHODDEF(void) 466write_marker_byte (j_compress_ptr cinfo, int val) 467/* Emit one byte of marker parameters following write_marker_header */ 468{ 469 emit_byte(cinfo, val); 470} 471 472 473/* 474 * Write datastream header. 475 * This consists of an SOI and optional APPn markers. 476 * We recommend use of the JFIF marker, but not the Adobe marker, 477 * when using YCbCr or grayscale data. The JFIF marker should NOT 478 * be used for any other JPEG colorspace. The Adobe marker is helpful 479 * to distinguish RGB, CMYK, and YCCK colorspaces. 480 * Note that an application can write additional header markers after 481 * jpeg_start_compress returns. 482 */ 483 484METHODDEF(void) 485write_file_header (j_compress_ptr cinfo) 486{ 487 my_marker_ptr marker = (my_marker_ptr) cinfo->marker; 488 489 emit_marker(cinfo, M_SOI); /* first the SOI */ 490 491 /* SOI is defined to reset restart interval to 0 */ 492 marker->last_restart_interval = 0; 493 494 if (cinfo->write_JFIF_header) /* next an optional JFIF APP0 */ 495 emit_jfif_app0(cinfo); 496 if (cinfo->write_Adobe_marker) /* next an optional Adobe APP14 */ 497 emit_adobe_app14(cinfo); 498} 499 500 501/* 502 * Write frame header. 503 * This consists of DQT and SOFn markers, and a conditional pseudo SOS marker. 504 * Note that we do not emit the SOF until we have emitted the DQT(s). 505 * This avoids compatibility problems with incorrect implementations that 506 * try to error-check the quant table numbers as soon as they see the SOF. 507 */ 508 509METHODDEF(void) 510write_frame_header (j_compress_ptr cinfo) 511{ 512 int ci, prec; 513 boolean is_baseline; 514 jpeg_component_info *compptr; 515 516 /* Emit DQT for each quantization table. 517 * Note that emit_dqt() suppresses any duplicate tables. 518 */ 519 prec = 0; 520 for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components; 521 ci++, compptr++) { 522 prec += emit_dqt(cinfo, compptr->quant_tbl_no); 523 } 524 /* now prec is nonzero iff there are any 16-bit quant tables. */ 525 526 /* Check for a non-baseline specification. 527 * Note we assume that Huffman table numbers won't be changed later. 528 */ 529 if (cinfo->arith_code || cinfo->progressive_mode || 530 cinfo->data_precision != 8 || cinfo->block_size != DCTSIZE) { 531 is_baseline = FALSE; 532 } else { 533 is_baseline = TRUE; 534 for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components; 535 ci++, compptr++) { 536 if (compptr->dc_tbl_no > 1 || compptr->ac_tbl_no > 1) 537 is_baseline = FALSE; 538 } 539 if (prec && is_baseline) { 540 is_baseline = FALSE; 541 /* If it's baseline except for quantizer size, warn the user */ 542 TRACEMS(cinfo, 0, JTRC_16BIT_TABLES); 543 } 544 } 545 546 /* Emit the proper SOF marker */ 547 if (cinfo->arith_code) { 548 if (cinfo->progressive_mode) 549 emit_sof(cinfo, M_SOF10); /* SOF code for progressive arithmetic */ 550 else 551 emit_sof(cinfo, M_SOF9); /* SOF code for sequential arithmetic */ 552 } else { 553 if (cinfo->progressive_mode) 554 emit_sof(cinfo, M_SOF2); /* SOF code for progressive Huffman */ 555 else if (is_baseline) 556 emit_sof(cinfo, M_SOF0); /* SOF code for baseline implementation */ 557 else 558 emit_sof(cinfo, M_SOF1); /* SOF code for non-baseline Huffman file */ 559 } 560 561 /* Check to emit pseudo SOS marker */ 562 if (cinfo->progressive_mode && cinfo->block_size != DCTSIZE) 563 emit_pseudo_sos(cinfo); 564} 565 566 567/* 568 * Write scan header. 569 * This consists of DHT or DAC markers, optional DRI, and SOS. 570 * Compressed data will be written following the SOS. 571 */ 572 573METHODDEF(void) 574write_scan_header (j_compress_ptr cinfo) 575{ 576 my_marker_ptr marker = (my_marker_ptr) cinfo->marker; 577 int i; 578 jpeg_component_info *compptr; 579 580 if (cinfo->arith_code) { 581 /* Emit arith conditioning info. We may have some duplication 582 * if the file has multiple scans, but it's so small it's hardly 583 * worth worrying about. 584 */ 585 emit_dac(cinfo); 586 } else { 587 /* Emit Huffman tables. 588 * Note that emit_dht() suppresses any duplicate tables. 589 */ 590 for (i = 0; i < cinfo->comps_in_scan; i++) { 591 compptr = cinfo->cur_comp_info[i]; 592 /* DC needs no table for refinement scan */ 593 if (cinfo->Ss == 0 && cinfo->Ah == 0) 594 emit_dht(cinfo, compptr->dc_tbl_no, FALSE); 595 /* AC needs no table when not present */ 596 if (cinfo->Se) 597 emit_dht(cinfo, compptr->ac_tbl_no, TRUE); 598 } 599 } 600 601 /* Emit DRI if required --- note that DRI value could change for each scan. 602 * We avoid wasting space with unnecessary DRIs, however. 603 */ 604 if (cinfo->restart_interval != marker->last_restart_interval) { 605 emit_dri(cinfo); 606 marker->last_restart_interval = cinfo->restart_interval; 607 } 608 609 emit_sos(cinfo); 610} 611 612 613/* 614 * Write datastream trailer. 615 */ 616 617METHODDEF(void) 618write_file_trailer (j_compress_ptr cinfo) 619{ 620 emit_marker(cinfo, M_EOI); 621} 622 623 624/* 625 * Write an abbreviated table-specification datastream. 626 * This consists of SOI, DQT and DHT tables, and EOI. 627 * Any table that is defined and not marked sent_table = TRUE will be 628 * emitted. Note that all tables will be marked sent_table = TRUE at exit. 629 */ 630 631METHODDEF(void) 632write_tables_only (j_compress_ptr cinfo) 633{ 634 int i; 635 636 emit_marker(cinfo, M_SOI); 637 638 for (i = 0; i < NUM_QUANT_TBLS; i++) { 639 if (cinfo->quant_tbl_ptrs[i] != NULL) 640 (void) emit_dqt(cinfo, i); 641 } 642 643 if (! cinfo->arith_code) { 644 for (i = 0; i < NUM_HUFF_TBLS; i++) { 645 if (cinfo->dc_huff_tbl_ptrs[i] != NULL) 646 emit_dht(cinfo, i, FALSE); 647 if (cinfo->ac_huff_tbl_ptrs[i] != NULL) 648 emit_dht(cinfo, i, TRUE); 649 } 650 } 651 652 emit_marker(cinfo, M_EOI); 653} 654 655 656/* 657 * Initialize the marker writer module. 658 */ 659 660GLOBAL(void) 661jinit_marker_writer (j_compress_ptr cinfo) 662{ 663 my_marker_ptr marker; 664 665 /* Create the subobject */ 666 marker = (my_marker_ptr) 667 (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE, 668 SIZEOF(my_marker_writer)); 669 cinfo->marker = (struct jpeg_marker_writer *) marker; 670 /* Initialize method pointers */ 671 marker->pub.write_file_header = write_file_header; 672 marker->pub.write_frame_header = write_frame_header; 673 marker->pub.write_scan_header = write_scan_header; 674 marker->pub.write_file_trailer = write_file_trailer; 675 marker->pub.write_tables_only = write_tables_only; 676 marker->pub.write_marker_header = write_marker_header; 677 marker->pub.write_marker_byte = write_marker_byte; 678 /* Initialize private state */ 679 marker->last_restart_interval = 0; 680} 681