19f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* 29f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * wrjpgcom.c 39f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * 49f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Copyright (C) 1994-1997, Thomas G. Lane. 59f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * This file is part of the Independent JPEG Group's software. 69f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * For conditions of distribution and use, see the accompanying README file. 79f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * 89f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * This file contains a very simple stand-alone application that inserts 99f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * user-supplied text as a COM (comment) marker in a JFIF file. 109f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * This may be useful as an example of the minimum logic needed to parse 119f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * JPEG markers. 129f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 139f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 149f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#define JPEG_CJPEG_DJPEG /* to get the command-line config symbols */ 159f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#include "jinclude.h" /* get auto-config symbols, <stdio.h> */ 169f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 179f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#ifndef HAVE_STDLIB_H /* <stdlib.h> should declare malloc() */ 189f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectextern void * malloc (); 199f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#endif 209f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#include <ctype.h> /* to declare isupper(), tolower() */ 219f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#ifdef USE_SETMODE 229f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#include <fcntl.h> /* to declare setmode()'s parameter macros */ 239f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* If you have setmode() but not <io.h>, just delete this line: */ 249f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#include <io.h> /* to declare setmode() */ 259f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#endif 269f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 279f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#ifdef USE_CCOMMAND /* command-line reader for Macintosh */ 289f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#ifdef __MWERKS__ 299f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#include <SIOUX.h> /* Metrowerks needs this */ 309f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#include <console.h> /* ... and this */ 319f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#endif 329f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#ifdef THINK_C 339f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#include <console.h> /* Think declares it here */ 349f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#endif 359f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#endif 369f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 379f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#ifdef DONT_USE_B_MODE /* define mode parameters for fopen() */ 389f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#define READ_BINARY "r" 399f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#define WRITE_BINARY "w" 409f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#else 419f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#ifdef VMS /* VMS is very nonstandard */ 429f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#define READ_BINARY "rb", "ctx=stm" 439f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#define WRITE_BINARY "wb", "ctx=stm" 449f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#else /* standard ANSI-compliant case */ 459f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#define READ_BINARY "rb" 469f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#define WRITE_BINARY "wb" 479f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#endif 489f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#endif 499f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 509f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#ifndef EXIT_FAILURE /* define exit() codes if not provided */ 519f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#define EXIT_FAILURE 1 529f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#endif 539f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#ifndef EXIT_SUCCESS 549f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#ifdef VMS 559f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#define EXIT_SUCCESS 1 /* VMS is very nonstandard */ 569f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#else 579f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#define EXIT_SUCCESS 0 589f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#endif 599f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#endif 609f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 619f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* Reduce this value if your malloc() can't allocate blocks up to 64K. 629f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * On DOS, compiling in large model is usually a better solution. 639f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 649f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 659f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#ifndef MAX_COM_LENGTH 669f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#define MAX_COM_LENGTH 65000L /* must be <= 65533 in any case */ 679f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#endif 689f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 699f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 709f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* 719f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * These macros are used to read the input file and write the output file. 729f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * To reuse this code in another application, you might need to change these. 739f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 749f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 759f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectstatic FILE * infile; /* input JPEG file */ 769f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 779f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* Return next input byte, or EOF if no more */ 789f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#define NEXTBYTE() getc(infile) 799f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 809f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectstatic FILE * outfile; /* output JPEG file */ 819f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 829f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* Emit an output byte */ 839f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#define PUTBYTE(x) putc((x), outfile) 849f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 859f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 869f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* Error exit handler */ 879f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#define ERREXIT(msg) (fprintf(stderr, "%s\n", msg), exit(EXIT_FAILURE)) 889f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 899f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 909f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* Read one byte, testing for EOF */ 919f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectstatic int 929f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectread_1_byte (void) 939f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project{ 949f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project int c; 959f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 969f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project c = NEXTBYTE(); 979f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (c == EOF) 989f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ERREXIT("Premature EOF in JPEG file"); 999f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project return c; 1009f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project} 1019f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 1029f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* Read 2 bytes, convert to unsigned int */ 1039f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* All 2-byte quantities in JPEG markers are MSB first */ 1049f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectstatic unsigned int 1059f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectread_2_bytes (void) 1069f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project{ 1079f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project int c1, c2; 1089f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 1099f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project c1 = NEXTBYTE(); 1109f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (c1 == EOF) 1119f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ERREXIT("Premature EOF in JPEG file"); 1129f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project c2 = NEXTBYTE(); 1139f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (c2 == EOF) 1149f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ERREXIT("Premature EOF in JPEG file"); 1159f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project return (((unsigned int) c1) << 8) + ((unsigned int) c2); 1169f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project} 1179f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 1189f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 1199f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* Routines to write data to output file */ 1209f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 1219f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectstatic void 1229f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectwrite_1_byte (int c) 1239f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project{ 1249f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project PUTBYTE(c); 1259f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project} 1269f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 1279f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectstatic void 1289f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectwrite_2_bytes (unsigned int val) 1299f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project{ 1309f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project PUTBYTE((val >> 8) & 0xFF); 1319f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project PUTBYTE(val & 0xFF); 1329f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project} 1339f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 1349f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectstatic void 1359f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectwrite_marker (int marker) 1369f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project{ 1379f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project PUTBYTE(0xFF); 1389f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project PUTBYTE(marker); 1399f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project} 1409f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 1419f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectstatic void 1429f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectcopy_rest_of_file (void) 1439f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project{ 1449f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project int c; 1459f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 1469f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project while ((c = NEXTBYTE()) != EOF) 1479f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project PUTBYTE(c); 1489f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project} 1499f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 1509f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 1519f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* 1529f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * JPEG markers consist of one or more 0xFF bytes, followed by a marker 1539f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * code byte (which is not an FF). Here are the marker codes of interest 1549f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * in this program. (See jdmarker.c for a more complete list.) 1559f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 1569f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 1579f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#define M_SOF0 0xC0 /* Start Of Frame N */ 1589f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#define M_SOF1 0xC1 /* N indicates which compression process */ 1599f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#define M_SOF2 0xC2 /* Only SOF0-SOF2 are now in common use */ 1609f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#define M_SOF3 0xC3 1619f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#define M_SOF5 0xC5 /* NB: codes C4 and CC are NOT SOF markers */ 1629f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#define M_SOF6 0xC6 1639f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#define M_SOF7 0xC7 1649f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#define M_SOF9 0xC9 1659f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#define M_SOF10 0xCA 1669f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#define M_SOF11 0xCB 1679f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#define M_SOF13 0xCD 1689f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#define M_SOF14 0xCE 1699f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#define M_SOF15 0xCF 1709f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#define M_SOI 0xD8 /* Start Of Image (beginning of datastream) */ 1719f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#define M_EOI 0xD9 /* End Of Image (end of datastream) */ 1729f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#define M_SOS 0xDA /* Start Of Scan (begins compressed data) */ 1739f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#define M_COM 0xFE /* COMment */ 1749f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 1759f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 1769f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* 1779f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Find the next JPEG marker and return its marker code. 1789f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * We expect at least one FF byte, possibly more if the compressor used FFs 1799f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * to pad the file. (Padding FFs will NOT be replicated in the output file.) 1809f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * There could also be non-FF garbage between markers. The treatment of such 1819f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * garbage is unspecified; we choose to skip over it but emit a warning msg. 1829f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * NB: this routine must not be used after seeing SOS marker, since it will 1839f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * not deal correctly with FF/00 sequences in the compressed image data... 1849f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 1859f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 1869f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectstatic int 1879f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectnext_marker (void) 1889f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project{ 1899f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project int c; 1909f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project int discarded_bytes = 0; 1919f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 1929f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Find 0xFF byte; count and skip any non-FFs. */ 1939f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project c = read_1_byte(); 1949f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project while (c != 0xFF) { 1959f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project discarded_bytes++; 1969f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project c = read_1_byte(); 1979f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 1989f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Get marker code byte, swallowing any duplicate FF bytes. Extra FFs 1999f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * are legal as pad bytes, so don't count them in discarded_bytes. 2009f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 2019f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project do { 2029f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project c = read_1_byte(); 2039f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } while (c == 0xFF); 2049f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2059f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (discarded_bytes != 0) { 2069f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project fprintf(stderr, "Warning: garbage data found in JPEG file\n"); 2079f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 2089f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2099f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project return c; 2109f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project} 2119f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2129f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2139f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* 2149f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Read the initial marker, which should be SOI. 2159f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * For a JFIF file, the first two bytes of the file should be literally 2169f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * 0xFF M_SOI. To be more general, we could use next_marker, but if the 2179f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * input file weren't actually JPEG at all, next_marker might read the whole 2189f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * file and then return a misleading error message... 2199f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 2209f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2219f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectstatic int 2229f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectfirst_marker (void) 2239f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project{ 2249f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project int c1, c2; 2259f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2269f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project c1 = NEXTBYTE(); 2279f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project c2 = NEXTBYTE(); 2289f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (c1 != 0xFF || c2 != M_SOI) 2299f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ERREXIT("Not a JPEG file"); 2309f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project return c2; 2319f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project} 2329f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2339f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2349f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* 2359f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Most types of marker are followed by a variable-length parameter segment. 2369f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * This routine skips over the parameters for any marker we don't otherwise 2379f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * want to process. 2389f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Note that we MUST skip the parameter segment explicitly in order not to 2399f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * be fooled by 0xFF bytes that might appear within the parameter segment; 2409f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * such bytes do NOT introduce new markers. 2419f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 2429f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2439f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectstatic void 2449f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectcopy_variable (void) 2459f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* Copy an unknown or uninteresting variable-length marker */ 2469f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project{ 2479f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project unsigned int length; 2489f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2499f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Get the marker parameter length count */ 2509f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project length = read_2_bytes(); 2519f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project write_2_bytes(length); 2529f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Length includes itself, so must be at least 2 */ 2539f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (length < 2) 2549f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ERREXIT("Erroneous JPEG marker length"); 2559f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project length -= 2; 2569f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Skip over the remaining bytes */ 2579f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project while (length > 0) { 2589f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project write_1_byte(read_1_byte()); 2599f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project length--; 2609f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 2619f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project} 2629f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2639f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectstatic void 2649f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectskip_variable (void) 2659f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* Skip over an unknown or uninteresting variable-length marker */ 2669f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project{ 2679f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project unsigned int length; 2689f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2699f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Get the marker parameter length count */ 2709f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project length = read_2_bytes(); 2719f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Length includes itself, so must be at least 2 */ 2729f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (length < 2) 2739f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ERREXIT("Erroneous JPEG marker length"); 2749f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project length -= 2; 2759f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Skip over the remaining bytes */ 2769f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project while (length > 0) { 2779f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project (void) read_1_byte(); 2789f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project length--; 2799f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 2809f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project} 2819f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2829f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2839f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* 2849f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Parse the marker stream until SOFn or EOI is seen; 2859f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * copy data to output, but discard COM markers unless keep_COM is true. 2869f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 2879f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2889f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectstatic int 2899f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectscan_JPEG_header (int keep_COM) 2909f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project{ 2919f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project int marker; 2929f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2939f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Expect SOI at start of file */ 2949f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (first_marker() != M_SOI) 2959f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ERREXIT("Expected SOI marker first"); 2969f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project write_marker(M_SOI); 2979f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2989f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Scan miscellaneous markers until we reach SOFn. */ 2999f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project for (;;) { 3009f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project marker = next_marker(); 3019f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project switch (marker) { 3029f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Note that marker codes 0xC4, 0xC8, 0xCC are not, and must not be, 3039f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * treated as SOFn. C4 in particular is actually DHT. 3049f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 3059f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project case M_SOF0: /* Baseline */ 3069f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project case M_SOF1: /* Extended sequential, Huffman */ 3079f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project case M_SOF2: /* Progressive, Huffman */ 3089f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project case M_SOF3: /* Lossless, Huffman */ 3099f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project case M_SOF5: /* Differential sequential, Huffman */ 3109f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project case M_SOF6: /* Differential progressive, Huffman */ 3119f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project case M_SOF7: /* Differential lossless, Huffman */ 3129f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project case M_SOF9: /* Extended sequential, arithmetic */ 3139f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project case M_SOF10: /* Progressive, arithmetic */ 3149f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project case M_SOF11: /* Lossless, arithmetic */ 3159f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project case M_SOF13: /* Differential sequential, arithmetic */ 3169f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project case M_SOF14: /* Differential progressive, arithmetic */ 3179f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project case M_SOF15: /* Differential lossless, arithmetic */ 3189f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project return marker; 3199f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 3209f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project case M_SOS: /* should not see compressed data before SOF */ 3219f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ERREXIT("SOS without prior SOFn"); 3229f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project break; 3239f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 3249f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project case M_EOI: /* in case it's a tables-only JPEG stream */ 3259f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project return marker; 3269f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 3279f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project case M_COM: /* Existing COM: conditionally discard */ 3289f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (keep_COM) { 3299f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project write_marker(marker); 3309f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project copy_variable(); 3319f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } else { 3329f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project skip_variable(); 3339f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 3349f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project break; 3359f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 3369f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project default: /* Anything else just gets copied */ 3379f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project write_marker(marker); 3389f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project copy_variable(); /* we assume it has a parameter count... */ 3399f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project break; 3409f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 3419f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } /* end loop */ 3429f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project} 3439f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 3449f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 3459f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* Command line parsing code */ 3469f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 3479f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectstatic const char * progname; /* program name for error messages */ 3489f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 3499f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 3509f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectstatic void 3519f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectusage (void) 3529f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* complain about bad command line */ 3539f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project{ 3549f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project fprintf(stderr, "wrjpgcom inserts a textual comment in a JPEG file.\n"); 3559f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project fprintf(stderr, "You can add to or replace any existing comment(s).\n"); 3569f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 3579f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project fprintf(stderr, "Usage: %s [switches] ", progname); 3589f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#ifdef TWO_FILE_COMMANDLINE 3599f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project fprintf(stderr, "inputfile outputfile\n"); 3609f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#else 3619f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project fprintf(stderr, "[inputfile]\n"); 3629f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#endif 3639f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 3649f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project fprintf(stderr, "Switches (names may be abbreviated):\n"); 3659f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project fprintf(stderr, " -replace Delete any existing comments\n"); 3669f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project fprintf(stderr, " -comment \"text\" Insert comment with given text\n"); 3679f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project fprintf(stderr, " -cfile name Read comment from named file\n"); 3689f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project fprintf(stderr, "Notice that you must put quotes around the comment text\n"); 3699f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project fprintf(stderr, "when you use -comment.\n"); 3709f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project fprintf(stderr, "If you do not give either -comment or -cfile on the command line,\n"); 3719f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project fprintf(stderr, "then the comment text is read from standard input.\n"); 3729f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project fprintf(stderr, "It can be multiple lines, up to %u characters total.\n", 3739f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project (unsigned int) MAX_COM_LENGTH); 3749f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#ifndef TWO_FILE_COMMANDLINE 3759f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project fprintf(stderr, "You must specify an input JPEG file name when supplying\n"); 3769f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project fprintf(stderr, "comment text from standard input.\n"); 3779f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#endif 3789f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 3799f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project exit(EXIT_FAILURE); 3809f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project} 3819f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 3829f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 3839f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectstatic int 3849f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectkeymatch (char * arg, const char * keyword, int minchars) 3859f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* Case-insensitive matching of (possibly abbreviated) keyword switches. */ 3869f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* keyword is the constant keyword (must be lower case already), */ 3879f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* minchars is length of minimum legal abbreviation. */ 3889f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project{ 3899f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project register int ca, ck; 3909f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project register int nmatched = 0; 3919f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 3929f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project while ((ca = *arg++) != '\0') { 3939f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if ((ck = *keyword++) == '\0') 3949f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project return 0; /* arg longer than keyword, no good */ 3959f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (isupper(ca)) /* force arg to lcase (assume ck is already) */ 3969f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ca = tolower(ca); 3979f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (ca != ck) 3989f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project return 0; /* no good */ 3999f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project nmatched++; /* count matched characters */ 4009f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 4019f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* reached end of argument; fail if it's too short for unique abbrev */ 4029f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (nmatched < minchars) 4039f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project return 0; 4049f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project return 1; /* A-OK */ 4059f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project} 4069f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 4079f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 4089f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* 4099f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * The main program. 4109f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 4119f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 4129f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectint 4139f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectmain (int argc, char **argv) 4149f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project{ 4159f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project int argn; 4169f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project char * arg; 4179f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project int keep_COM = 1; 4189f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project char * comment_arg = NULL; 4199f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project FILE * comment_file = NULL; 4209f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project unsigned int comment_length = 0; 4219f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project int marker; 4229f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 4239f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* On Mac, fetch a command line. */ 4249f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#ifdef USE_CCOMMAND 4259f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project argc = ccommand(&argv); 4269f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#endif 4279f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 4289f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project progname = argv[0]; 4299f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (progname == NULL || progname[0] == 0) 4309f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project progname = "wrjpgcom"; /* in case C library doesn't provide it */ 4319f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 4329f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Parse switches, if any */ 4339f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project for (argn = 1; argn < argc; argn++) { 4349f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project arg = argv[argn]; 4359f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (arg[0] != '-') 4369f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project break; /* not switch, must be file name */ 4379f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project arg++; /* advance over '-' */ 4389f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (keymatch(arg, "replace", 1)) { 4399f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project keep_COM = 0; 4409f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } else if (keymatch(arg, "cfile", 2)) { 4419f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (++argn >= argc) usage(); 4429f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if ((comment_file = fopen(argv[argn], "r")) == NULL) { 4439f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project fprintf(stderr, "%s: can't open %s\n", progname, argv[argn]); 4449f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project exit(EXIT_FAILURE); 4459f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 4469f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } else if (keymatch(arg, "comment", 1)) { 4479f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (++argn >= argc) usage(); 4489f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project comment_arg = argv[argn]; 4499f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* If the comment text starts with '"', then we are probably running 4509f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * under MS-DOG and must parse out the quoted string ourselves. Sigh. 4519f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 4529f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (comment_arg[0] == '"') { 4539f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project comment_arg = (char *) malloc((size_t) MAX_COM_LENGTH); 4549f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (comment_arg == NULL) 4559f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ERREXIT("Insufficient memory"); 4569f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project strcpy(comment_arg, argv[argn]+1); 4579f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project for (;;) { 4589f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project comment_length = (unsigned int) strlen(comment_arg); 4599f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (comment_length > 0 && comment_arg[comment_length-1] == '"') { 4609f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project comment_arg[comment_length-1] = '\0'; /* zap terminating quote */ 4619f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project break; 4629f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 4639f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (++argn >= argc) 4649f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ERREXIT("Missing ending quote mark"); 4659f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project strcat(comment_arg, " "); 4669f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project strcat(comment_arg, argv[argn]); 4679f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 4689f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 4699f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project comment_length = (unsigned int) strlen(comment_arg); 4709f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } else 4719f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project usage(); 4729f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 4739f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 4749f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Cannot use both -comment and -cfile. */ 4759f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (comment_arg != NULL && comment_file != NULL) 4769f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project usage(); 4779f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* If there is neither -comment nor -cfile, we will read the comment text 4789f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * from stdin; in this case there MUST be an input JPEG file name. 4799f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 4809f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (comment_arg == NULL && comment_file == NULL && argn >= argc) 4819f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project usage(); 4829f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 4839f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Open the input file. */ 4849f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (argn < argc) { 4859f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if ((infile = fopen(argv[argn], READ_BINARY)) == NULL) { 4869f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project fprintf(stderr, "%s: can't open %s\n", progname, argv[argn]); 4879f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project exit(EXIT_FAILURE); 4889f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 4899f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } else { 4909f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* default input file is stdin */ 4919f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#ifdef USE_SETMODE /* need to hack file mode? */ 4929f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project setmode(fileno(stdin), O_BINARY); 4939f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#endif 4949f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#ifdef USE_FDOPEN /* need to re-open in binary mode? */ 4959f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if ((infile = fdopen(fileno(stdin), READ_BINARY)) == NULL) { 4969f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project fprintf(stderr, "%s: can't open stdin\n", progname); 4979f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project exit(EXIT_FAILURE); 4989f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 4999f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#else 5009f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project infile = stdin; 5019f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#endif 5029f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 5039f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 5049f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Open the output file. */ 5059f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#ifdef TWO_FILE_COMMANDLINE 5069f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Must have explicit output file name */ 5079f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (argn != argc-2) { 5089f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project fprintf(stderr, "%s: must name one input and one output file\n", 5099f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project progname); 5109f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project usage(); 5119f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 5129f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if ((outfile = fopen(argv[argn+1], WRITE_BINARY)) == NULL) { 5139f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project fprintf(stderr, "%s: can't open %s\n", progname, argv[argn+1]); 5149f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project exit(EXIT_FAILURE); 5159f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 5169f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#else 5179f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Unix style: expect zero or one file name */ 5189f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (argn < argc-1) { 5199f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project fprintf(stderr, "%s: only one input file\n", progname); 5209f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project usage(); 5219f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 5229f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* default output file is stdout */ 5239f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#ifdef USE_SETMODE /* need to hack file mode? */ 5249f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project setmode(fileno(stdout), O_BINARY); 5259f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#endif 5269f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#ifdef USE_FDOPEN /* need to re-open in binary mode? */ 5279f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if ((outfile = fdopen(fileno(stdout), WRITE_BINARY)) == NULL) { 5289f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project fprintf(stderr, "%s: can't open stdout\n", progname); 5299f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project exit(EXIT_FAILURE); 5309f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 5319f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#else 5329f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project outfile = stdout; 5339f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#endif 5349f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#endif /* TWO_FILE_COMMANDLINE */ 5359f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 5369f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Collect comment text from comment_file or stdin, if necessary */ 5379f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (comment_arg == NULL) { 5389f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project FILE * src_file; 5399f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project int c; 5409f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 5419f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project comment_arg = (char *) malloc((size_t) MAX_COM_LENGTH); 5429f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (comment_arg == NULL) 5439f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ERREXIT("Insufficient memory"); 5449f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project comment_length = 0; 5459f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project src_file = (comment_file != NULL ? comment_file : stdin); 5469f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project while ((c = getc(src_file)) != EOF) { 5479f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (comment_length >= (unsigned int) MAX_COM_LENGTH) { 5489f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project fprintf(stderr, "Comment text may not exceed %u bytes\n", 5499f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project (unsigned int) MAX_COM_LENGTH); 5509f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project exit(EXIT_FAILURE); 5519f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 5529f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project comment_arg[comment_length++] = (char) c; 5539f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 5549f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (comment_file != NULL) 5559f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project fclose(comment_file); 5569f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 5579f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 5589f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Copy JPEG headers until SOFn marker; 5599f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * we will insert the new comment marker just before SOFn. 5609f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * This (a) causes the new comment to appear after, rather than before, 5619f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * existing comments; and (b) ensures that comments come after any JFIF 5629f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * or JFXX markers, as required by the JFIF specification. 5639f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 5649f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project marker = scan_JPEG_header(keep_COM); 5659f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Insert the new COM marker, but only if nonempty text has been supplied */ 5669f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (comment_length > 0) { 5679f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project write_marker(M_COM); 5689f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project write_2_bytes(comment_length + 2); 5699f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project while (comment_length > 0) { 5709f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project write_1_byte(*comment_arg++); 5719f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project comment_length--; 5729f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 5739f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 5749f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Duplicate the remainder of the source file. 5759f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Note that any COM markers occuring after SOF will not be touched. 5769f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 5779f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project write_marker(marker); 5789f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project copy_rest_of_file(); 5799f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 5809f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* All done. */ 5819f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project exit(EXIT_SUCCESS); 5829f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project return 0; /* suppress no-return-value warnings */ 5839f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project} 584