| /* |
| * jcmain.c |
| * |
| * Copyright (C) 1991, 1992, Thomas G. Lane. |
| * This file is part of the Independent JPEG Group's software. |
| * For conditions of distribution and use, see the accompanying README file. |
| * |
| * This file contains a command-line user interface for the JPEG compressor. |
| * It should work on any system with Unix- or MS-DOS-style command lines. |
| * |
| * Two different command line styles are permitted, depending on the |
| * compile-time switch TWO_FILE_COMMANDLINE: |
| * cjpeg [options] inputfile outputfile |
| * cjpeg [options] [inputfile] |
| * In the second style, output is always to standard output, which you'd |
| * normally redirect to a file or pipe to some other program. Input is |
| * either from a named file or from standard input (typically redirected). |
| * The second style is convenient on Unix but is unhelpful on systems that |
| * don't support pipes. Also, you MUST use the first style if your system |
| * doesn't do binary I/O to stdin/stdout. |
| */ |
| |
| #include "jinclude.h" |
| #ifdef INCLUDES_ARE_ANSI |
| #include <stdlib.h> /* to declare exit() */ |
| #endif |
| #include <ctype.h> /* to declare isupper(), tolower() */ |
| #ifdef NEED_SIGNAL_CATCHER |
| #include <signal.h> /* to declare signal() */ |
| #endif |
| #ifdef USE_SETMODE |
| #include <fcntl.h> /* to declare setmode() */ |
| #endif |
| |
| #ifdef THINK_C |
| #include <console.h> /* command-line reader for Macintosh */ |
| #endif |
| |
| #ifdef DONT_USE_B_MODE /* define mode parameters for fopen() */ |
| #define READ_BINARY "r" |
| #define WRITE_BINARY "w" |
| #else |
| #define READ_BINARY "rb" |
| #define WRITE_BINARY "wb" |
| #endif |
| |
| #ifndef EXIT_FAILURE /* define exit() codes if not provided */ |
| #define EXIT_FAILURE 1 |
| #endif |
| #ifndef EXIT_SUCCESS |
| #ifdef VMS |
| #define EXIT_SUCCESS 1 /* VMS is very nonstandard */ |
| #else |
| #define EXIT_SUCCESS 0 |
| #endif |
| #endif |
| |
| |
| #include "jversion.h" /* for version message */ |
| |
| |
| /* |
| * This routine determines what format the input file is, |
| * and selects the appropriate input-reading module. |
| * |
| * To determine which family of input formats the file belongs to, |
| * we may look only at the first byte of the file, since C does not |
| * guarantee that more than one character can be pushed back with ungetc. |
| * Looking at additional bytes would require one of these approaches: |
| * 1) assume we can fseek() the input file (fails for piped input); |
| * 2) assume we can push back more than one character (works in |
| * some C implementations, but unportable); |
| * 3) provide our own buffering as is done in djpeg (breaks input readers |
| * that want to use stdio directly, such as the RLE library); |
| * or 4) don't put back the data, and modify the input_init methods to assume |
| * they start reading after the start of file (also breaks RLE library). |
| * #1 is attractive for MS-DOS but is untenable on Unix. |
| * |
| * The most portable solution for file types that can't be identified by their |
| * first byte is to make the user tell us what they are. This is also the |
| * only approach for "raw" file types that contain only arbitrary values. |
| * We presently apply this method for Targa files. Most of the time Targa |
| * files start with 0x00, so we recognize that case. Potentially, however, |
| * a Targa file could start with any byte value (byte 0 is the length of the |
| * seldom-used ID field), so we provide a switch to force Targa input mode. |
| */ |
| |
| static boolean is_targa; /* records user -targa switch */ |
| |
| |
| LOCAL void |
| select_file_type (compress_info_ptr cinfo) |
| { |
| int c; |
| |
| if (is_targa) { |
| #ifdef TARGA_SUPPORTED |
| jselrtarga(cinfo); |
| #else |
| ERREXIT(cinfo->emethods, "Targa support was not compiled"); |
| #endif |
| return; |
| } |
| |
| if ((c = getc(cinfo->input_file)) == EOF) |
| ERREXIT(cinfo->emethods, "Empty input file"); |
| |
| switch (c) { |
| #ifdef GIF_SUPPORTED |
| case 'G': |
| jselrgif(cinfo); |
| break; |
| #endif |
| #ifdef PPM_SUPPORTED |
| case 'P': |
| jselrppm(cinfo); |
| break; |
| #endif |
| #ifdef RLE_SUPPORTED |
| case 'R': |
| jselrrle(cinfo); |
| break; |
| #endif |
| #ifdef TARGA_SUPPORTED |
| case 0x00: |
| jselrtarga(cinfo); |
| break; |
| #endif |
| default: |
| #ifdef TARGA_SUPPORTED |
| ERREXIT(cinfo->emethods, "Unrecognized input file format --- perhaps you need -targa"); |
| #else |
| ERREXIT(cinfo->emethods, "Unrecognized input file format"); |
| #endif |
| break; |
| } |
| |
| if (ungetc(c, cinfo->input_file) == EOF) |
| ERREXIT(cinfo->emethods, "ungetc failed"); |
| } |
| |
| |
| /* |
| * This routine gets control after the input file header has been read. |
| * It must determine what output JPEG file format is to be written, |
| * and make any other compression parameter changes that are desirable. |
| */ |
| |
| METHODDEF void |
| c_ui_method_selection (compress_info_ptr cinfo) |
| { |
| /* If the input is gray scale, generate a monochrome JPEG file. */ |
| if (cinfo->in_color_space == CS_GRAYSCALE) |
| j_monochrome_default(cinfo); |
| /* For now, always select JFIF output format. */ |
| #ifdef JFIF_SUPPORTED |
| jselwjfif(cinfo); |
| #else |
| You shoulda defined JFIF_SUPPORTED. /* deliberate syntax error */ |
| #endif |
| } |
| |
| |
| /* |
| * Signal catcher to ensure that temporary files are removed before aborting. |
| * NB: for Amiga Manx C this is actually a global routine named _abort(); |
| * see -Dsignal_catcher=_abort in CFLAGS. Talk about bogus... |
| */ |
| |
| #ifdef NEED_SIGNAL_CATCHER |
| |
| static external_methods_ptr emethods; /* for access to free_all */ |
| |
| GLOBAL void |
| signal_catcher (int signum) |
| { |
| if (emethods != NULL) { |
| emethods->trace_level = 0; /* turn off trace output */ |
| (*emethods->free_all) (); /* clean up memory allocation & temp files */ |
| } |
| exit(EXIT_FAILURE); |
| } |
| |
| #endif |
| |
| |
| /* |
| * Optional routine to display a percent-done figure on stderr. |
| * See jcdeflts.c for explanation of the information used. |
| */ |
| |
| #ifdef PROGRESS_REPORT |
| |
| METHODDEF void |
| progress_monitor (compress_info_ptr cinfo, long loopcounter, long looplimit) |
| { |
| if (cinfo->total_passes > 1) { |
| fprintf(stderr, "\rPass %d/%d: %3d%% ", |
| cinfo->completed_passes+1, cinfo->total_passes, |
| (int) (loopcounter*100L/looplimit)); |
| } else { |
| fprintf(stderr, "\r %3d%% ", |
| (int) (loopcounter*100L/looplimit)); |
| } |
| fflush(stderr); |
| } |
| |
| #endif |
| |
| |
| /* |
| * Argument-parsing code. |
| * The switch parser is designed to be useful with DOS-style command line |
| * syntax, ie, intermixed switches and file names, where only the switches |
| * to the left of a given file name affect processing of that file. |
| * The main program in this file doesn't actually use this capability... |
| */ |
| |
| |
| static char * progname; /* program name for error messages */ |
| |
| |
| LOCAL void |
| usage (void) |
| /* complain about bad command line */ |
| { |
| fprintf(stderr, "usage: %s [switches] ", progname); |
| #ifdef TWO_FILE_COMMANDLINE |
| fprintf(stderr, "inputfile outputfile\n"); |
| #else |
| fprintf(stderr, "[inputfile]\n"); |
| #endif |
| |
| fprintf(stderr, "Switches (names may be abbreviated):\n"); |
| fprintf(stderr, " -quality N Compression quality (0..100; 5-95 is useful range)\n"); |
| fprintf(stderr, " -grayscale Create monochrome JPEG file\n"); |
| #ifdef ENTROPY_OPT_SUPPORTED |
| fprintf(stderr, " -optimize Optimize Huffman table (smaller file, but slow compression)\n"); |
| #endif |
| #ifdef TARGA_SUPPORTED |
| fprintf(stderr, " -targa Input file is Targa format (usually not needed)\n"); |
| #endif |
| fprintf(stderr, "Switches for advanced users:\n"); |
| fprintf(stderr, " -restart N Set restart interval in rows, or in blocks with B\n"); |
| #ifdef INPUT_SMOOTHING_SUPPORTED |
| fprintf(stderr, " -smooth N Smooth dithered input (N=1..100 is strength)\n"); |
| #endif |
| fprintf(stderr, " -maxmemory N Maximum memory to use (in kbytes)\n"); |
| fprintf(stderr, " -verbose or -debug Emit debug output\n"); |
| fprintf(stderr, "Switches for wizards:\n"); |
| #ifdef C_ARITH_CODING_SUPPORTED |
| fprintf(stderr, " -arithmetic Use arithmetic coding\n"); |
| #endif |
| #ifdef C_MULTISCAN_FILES_SUPPORTED |
| fprintf(stderr, " -nointerleave Create noninterleaved JPEG file\n"); |
| #endif |
| fprintf(stderr, " -qtables file Use quantization tables given in file\n"); |
| fprintf(stderr, " -sample HxV[,...] Set JPEG sampling factors\n"); |
| exit(EXIT_FAILURE); |
| } |
| |
| |
| LOCAL boolean |
| keymatch (char * arg, const char * keyword, int minchars) |
| /* Case-insensitive matching of (possibly abbreviated) keyword switches. */ |
| /* keyword is the constant keyword (must be lower case already), */ |
| /* minchars is length of minimum legal abbreviation. */ |
| { |
| register int ca, ck; |
| register int nmatched = 0; |
| |
| while ((ca = *arg++) != '\0') { |
| if ((ck = *keyword++) == '\0') |
| return FALSE; /* arg longer than keyword, no good */ |
| if (isupper(ca)) /* force arg to lcase (assume ck is already) */ |
| ca = tolower(ca); |
| if (ca != ck) |
| return FALSE; /* no good */ |
| nmatched++; /* count matched characters */ |
| } |
| /* reached end of argument; fail if it's too short for unique abbrev */ |
| if (nmatched < minchars) |
| return FALSE; |
| return TRUE; /* A-OK */ |
| } |
| |
| |
| LOCAL int |
| qt_getc (FILE * file) |
| /* Read next char, skipping over any comments (# to end of line) */ |
| /* A comment/newline sequence is returned as a newline */ |
| { |
| register int ch; |
| |
| ch = getc(file); |
| if (ch == '#') { |
| do { |
| ch = getc(file); |
| } while (ch != '\n' && ch != EOF); |
| } |
| return ch; |
| } |
| |
| |
| LOCAL long |
| read_qt_integer (FILE * file) |
| /* Read an unsigned decimal integer from a quantization-table file */ |
| /* Swallows one trailing character after the integer */ |
| { |
| register int ch; |
| register long val; |
| |
| /* Skip any leading whitespace, detect EOF */ |
| do { |
| ch = qt_getc(file); |
| if (ch == EOF) |
| return EOF; |
| } while (isspace(ch)); |
| |
| if (! isdigit(ch)) { |
| fprintf(stderr, "%s: bogus data in quantization file\n", progname); |
| exit(EXIT_FAILURE); |
| } |
| |
| val = ch - '0'; |
| while (ch = qt_getc(file), isdigit(ch)) { |
| val *= 10; |
| val += ch - '0'; |
| } |
| return val; |
| } |
| |
| |
| LOCAL void |
| read_quant_tables (compress_info_ptr cinfo, char * filename, int scale_factor) |
| /* Read a set of quantization tables from the specified file. |
| * The file is plain ASCII text: decimal numbers with whitespace between. |
| * Comments preceded by '#' may be included in the file. |
| * There may be one to NUM_QUANT_TBLS tables in the file, each of 64 values. |
| * The tables are implicitly numbered 0,1,etc. |
| */ |
| { |
| /* ZIG[i] is the zigzag-order position of the i'th element of a DCT block */ |
| /* read in natural order (left to right, top to bottom). */ |
| static const short ZIG[DCTSIZE2] = { |
| 0, 1, 5, 6, 14, 15, 27, 28, |
| 2, 4, 7, 13, 16, 26, 29, 42, |
| 3, 8, 12, 17, 25, 30, 41, 43, |
| 9, 11, 18, 24, 31, 40, 44, 53, |
| 10, 19, 23, 32, 39, 45, 52, 54, |
| 20, 22, 33, 38, 46, 51, 55, 60, |
| 21, 34, 37, 47, 50, 56, 59, 61, |
| 35, 36, 48, 49, 57, 58, 62, 63 |
| }; |
| FILE * fp; |
| int tblno, i; |
| long val; |
| QUANT_TBL table; |
| |
| if ((fp = fopen(filename, "r")) == NULL) { |
| fprintf(stderr, "%s: can't open %s\n", progname, filename); |
| exit(EXIT_FAILURE); |
| } |
| tblno = 0; |
| |
| while ((val = read_qt_integer(fp)) != EOF) { /* read 1st element of table */ |
| if (tblno >= NUM_QUANT_TBLS) { |
| fprintf(stderr, "%s: too many tables in file %s\n", progname, filename); |
| exit(EXIT_FAILURE); |
| } |
| table[0] = (QUANT_VAL) val; |
| for (i = 1; i < DCTSIZE2; i++) { |
| if ((val = read_qt_integer(fp)) == EOF) { |
| fprintf(stderr, "%s: incomplete table in file %s\n", progname, filename); |
| exit(EXIT_FAILURE); |
| } |
| table[ZIG[i]] = (QUANT_VAL) val; |
| } |
| j_add_quant_table(cinfo, tblno, table, scale_factor, FALSE); |
| tblno++; |
| } |
| |
| fclose(fp); |
| } |
| |
| |
| LOCAL void |
| set_sample_factors (compress_info_ptr cinfo, char *arg) |
| /* Process a sample-factors parameter string, of the form */ |
| /* HxV[,HxV,...] */ |
| { |
| #define MAX_COMPONENTS 4 /* # of comp_info slots made by jcdeflts.c */ |
| int ci, val1, val2; |
| char ch1, ch2; |
| |
| for (ci = 0; ci < MAX_COMPONENTS; ci++) { |
| if (*arg) { |
| ch2 = ','; /* if not set by sscanf, will be ',' */ |
| if (sscanf(arg, "%d%c%d%c", &val1, &ch1, &val2, &ch2) < 3) |
| usage(); |
| if ((ch1 != 'x' && ch1 != 'X') || ch2 != ',') |
| usage(); /* syntax check */ |
| if (val1 <= 0 || val1 > 4 || val2 <= 0 || val2 > 4) { |
| fprintf(stderr, "JPEG sampling factors must be 1..4\n"); |
| exit(EXIT_FAILURE); |
| } |
| cinfo->comp_info[ci].h_samp_factor = val1; |
| cinfo->comp_info[ci].v_samp_factor = val2; |
| while (*arg && *arg++ != ',') /* advance to next segment of arg string */ |
| ; |
| } else { |
| /* reached end of parameter, set remaining components to 1x1 sampling */ |
| cinfo->comp_info[ci].h_samp_factor = 1; |
| cinfo->comp_info[ci].v_samp_factor = 1; |
| } |
| } |
| } |
| |
| |
| LOCAL int |
| parse_switches (compress_info_ptr cinfo, int last_file_arg_seen, |
| int argc, char **argv) |
| /* Initialize cinfo with default switch settings, then parse option switches. |
| * Returns argv[] index of first file-name argument (== argc if none). |
| * Any file names with indexes <= last_file_arg_seen are ignored; |
| * they have presumably been processed in a previous iteration. |
| * (Pass 0 for last_file_arg_seen on the first or only iteration.) |
| */ |
| { |
| int argn; |
| char * arg; |
| char * qtablefile = NULL; /* saves -qtables filename if any */ |
| int q_scale_factor = 100; /* default to no scaling for -qtables */ |
| |
| /* (Re-)initialize the system-dependent error and memory managers. */ |
| jselerror(cinfo->emethods); /* error/trace message routines */ |
| jselmemmgr(cinfo->emethods); /* memory allocation routines */ |
| cinfo->methods->c_ui_method_selection = c_ui_method_selection; |
| |
| /* Now OK to enable signal catcher. */ |
| #ifdef NEED_SIGNAL_CATCHER |
| emethods = cinfo->emethods; |
| #endif |
| |
| /* Set up default JPEG parameters. */ |
| /* Note that default -quality level here need not, and does not, |
| * match the default scaling for an explicit -qtables argument. |
| */ |
| j_c_defaults(cinfo, 75, FALSE); /* default quality level = 75 */ |
| is_targa = FALSE; |
| |
| /* Scan command line options, adjust parameters */ |
| |
| for (argn = 1; argn < argc; argn++) { |
| arg = argv[argn]; |
| if (*arg != '-') { |
| /* Not a switch, must be a file name argument */ |
| if (argn <= last_file_arg_seen) |
| continue; /* ignore it if previously processed */ |
| break; /* else done parsing switches */ |
| } |
| arg++; /* advance past switch marker character */ |
| |
| if (keymatch(arg, "arithmetic", 1)) { |
| /* Use arithmetic coding. */ |
| #ifdef C_ARITH_CODING_SUPPORTED |
| cinfo->arith_code = TRUE; |
| #else |
| fprintf(stderr, "%s: sorry, arithmetic coding not supported\n", |
| progname); |
| exit(EXIT_FAILURE); |
| #endif |
| |
| } else if (keymatch(arg, "debug", 1) || keymatch(arg, "verbose", 1)) { |
| /* Enable debug printouts. */ |
| /* On first -d, print version identification */ |
| if (last_file_arg_seen == 0 && cinfo->emethods->trace_level == 0) |
| fprintf(stderr, "Independent JPEG Group's CJPEG, version %s\n%s\n", |
| JVERSION, JCOPYRIGHT); |
| cinfo->emethods->trace_level++; |
| |
| } else if (keymatch(arg, "grayscale", 2) || keymatch(arg, "greyscale",2)) { |
| /* Force a monochrome JPEG file to be generated. */ |
| j_monochrome_default(cinfo); |
| |
| } else if (keymatch(arg, "maxmemory", 1)) { |
| /* Maximum memory in Kb (or Mb with 'm'). */ |
| long lval; |
| char ch = 'x'; |
| |
| if (++argn >= argc) /* advance to next argument */ |
| usage(); |
| if (sscanf(argv[argn], "%ld%c", &lval, &ch) < 1) |
| usage(); |
| if (ch == 'm' || ch == 'M') |
| lval *= 1000L; |
| cinfo->emethods->max_memory_to_use = lval * 1000L; |
| |
| } else if (keymatch(arg, "nointerleave", 3)) { |
| /* Create noninterleaved file. */ |
| #ifdef C_MULTISCAN_FILES_SUPPORTED |
| cinfo->interleave = FALSE; |
| #else |
| fprintf(stderr, "%s: sorry, multiple-scan support was not compiled\n", |
| progname); |
| exit(EXIT_FAILURE); |
| #endif |
| |
| } else if (keymatch(arg, "optimize", 1) || keymatch(arg, "optimise", 1)) { |
| /* Enable entropy parm optimization. */ |
| #ifdef ENTROPY_OPT_SUPPORTED |
| cinfo->optimize_coding = TRUE; |
| #else |
| fprintf(stderr, "%s: sorry, entropy optimization was not compiled\n", |
| progname); |
| exit(EXIT_FAILURE); |
| #endif |
| |
| } else if (keymatch(arg, "quality", 1)) { |
| /* Quality factor (quantization table scaling factor). */ |
| int val; |
| |
| if (++argn >= argc) /* advance to next argument */ |
| usage(); |
| if (sscanf(argv[argn], "%d", &val) != 1) |
| usage(); |
| /* Set quantization tables (will be overridden if -qtables also given). |
| * Note: we make force_baseline FALSE. |
| * This means non-baseline JPEG files can be created with low Q values. |
| * To ensure only baseline files are generated, pass TRUE instead. |
| */ |
| j_set_quality(cinfo, val, FALSE); |
| /* Change scale factor in case -qtables is present. */ |
| q_scale_factor = j_quality_scaling(val); |
| |
| } else if (keymatch(arg, "qtables", 2)) { |
| /* Quantization tables fetched from file. */ |
| if (++argn >= argc) /* advance to next argument */ |
| usage(); |
| qtablefile = argv[argn]; |
| /* we postpone actually reading the file in case -quality comes later */ |
| |
| } else if (keymatch(arg, "restart", 1)) { |
| /* Restart interval in MCU rows (or in MCUs with 'b'). */ |
| long lval; |
| char ch = 'x'; |
| |
| if (++argn >= argc) /* advance to next argument */ |
| usage(); |
| if (sscanf(argv[argn], "%ld%c", &lval, &ch) < 1) |
| usage(); |
| if (lval < 0 || lval > 65535L) |
| usage(); |
| if (ch == 'b' || ch == 'B') |
| cinfo->restart_interval = (UINT16) lval; |
| else |
| cinfo->restart_in_rows = (int) lval; |
| |
| } else if (keymatch(arg, "sample", 2)) { |
| /* Set sampling factors. */ |
| if (++argn >= argc) /* advance to next argument */ |
| usage(); |
| set_sample_factors(cinfo, argv[argn]); |
| |
| } else if (keymatch(arg, "smooth", 2)) { |
| /* Set input smoothing factor. */ |
| int val; |
| |
| if (++argn >= argc) /* advance to next argument */ |
| usage(); |
| if (sscanf(argv[argn], "%d", &val) != 1) |
| usage(); |
| if (val < 0 || val > 100) |
| usage(); |
| cinfo->smoothing_factor = val; |
| |
| } else if (keymatch(arg, "targa", 1)) { |
| /* Input file is Targa format. */ |
| is_targa = TRUE; |
| |
| } else { |
| usage(); /* bogus switch */ |
| } |
| } |
| |
| /* Post-switch-scanning cleanup */ |
| |
| if (qtablefile != NULL) /* process -qtables if it was present */ |
| read_quant_tables(cinfo, qtablefile, q_scale_factor); |
| |
| return argn; /* return index of next arg (file name) */ |
| } |
| |
| |
| /* |
| * The main program. |
| */ |
| |
| GLOBAL int |
| main (int argc, char **argv) |
| { |
| struct Compress_info_struct cinfo; |
| struct Compress_methods_struct c_methods; |
| struct External_methods_struct e_methods; |
| int file_index; |
| |
| /* On Mac, fetch a command line. */ |
| #ifdef THINK_C |
| argc = ccommand(&argv); |
| #endif |
| |
| progname = argv[0]; |
| |
| /* Set up links to method structures. */ |
| cinfo.methods = &c_methods; |
| cinfo.emethods = &e_methods; |
| |
| /* Install, but don't yet enable signal catcher. */ |
| #ifdef NEED_SIGNAL_CATCHER |
| emethods = NULL; |
| signal(SIGINT, signal_catcher); |
| #ifdef SIGTERM /* not all systems have SIGTERM */ |
| signal(SIGTERM, signal_catcher); |
| #endif |
| #endif |
| |
| /* Scan command line: set up compression parameters, input & output files. */ |
| |
| file_index = parse_switches(&cinfo, 0, argc, argv); |
| |
| #ifdef TWO_FILE_COMMANDLINE |
| |
| if (file_index != argc-2) { |
| fprintf(stderr, "%s: must name one input and one output file\n", progname); |
| usage(); |
| } |
| if ((cinfo.input_file = fopen(argv[file_index], READ_BINARY)) == NULL) { |
| fprintf(stderr, "%s: can't open %s\n", progname, argv[file_index]); |
| exit(EXIT_FAILURE); |
| } |
| if ((cinfo.output_file = fopen(argv[file_index+1], WRITE_BINARY)) == NULL) { |
| fprintf(stderr, "%s: can't open %s\n", progname, argv[file_index+1]); |
| exit(EXIT_FAILURE); |
| } |
| |
| #else /* not TWO_FILE_COMMANDLINE -- use Unix style */ |
| |
| cinfo.input_file = stdin; /* default input file */ |
| cinfo.output_file = stdout; /* always the output file */ |
| |
| #ifdef USE_SETMODE /* need to hack file mode? */ |
| setmode(fileno(stdin), O_BINARY); |
| setmode(fileno(stdout), O_BINARY); |
| #endif |
| |
| if (file_index < argc-1) { |
| fprintf(stderr, "%s: only one input file\n", progname); |
| usage(); |
| } |
| if (file_index < argc) { |
| if ((cinfo.input_file = fopen(argv[file_index], READ_BINARY)) == NULL) { |
| fprintf(stderr, "%s: can't open %s\n", progname, argv[file_index]); |
| exit(EXIT_FAILURE); |
| } |
| } |
| |
| #endif /* TWO_FILE_COMMANDLINE */ |
| |
| /* Figure out the input file format, and set up to read it. */ |
| select_file_type(&cinfo); |
| |
| #ifdef PROGRESS_REPORT |
| /* Start up progress display, unless trace output is on */ |
| if (e_methods.trace_level == 0) |
| c_methods.progress_monitor = progress_monitor; |
| #endif |
| |
| /* Do it to it! */ |
| jpeg_compress(&cinfo); |
| |
| #ifdef PROGRESS_REPORT |
| /* Clear away progress display */ |
| if (e_methods.trace_level == 0) { |
| fprintf(stderr, "\r \r"); |
| fflush(stderr); |
| } |
| #endif |
| |
| /* All done. */ |
| exit(EXIT_SUCCESS); |
| return 0; /* suppress no-return-value warnings */ |
| } |