+++ /dev/null
-/*
- * cjpeg.c
- *
- * Copyright (C) 1991-1998, 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.
- * To simplify script writing, the "-outfile" switch is provided. The syntax
- * cjpeg [options] -outfile outputfile inputfile
- * works regardless of which command line style is used.
- */
-
-#include "cdjpeg.h" /* Common decls for cjpeg/djpeg applications */
-#include "jversion.h" /* for version message */
-
-#ifdef USE_CCOMMAND /* command-line reader for Macintosh */
-#ifdef __MWERKS__
-#include <SIOUX.h> /* Metrowerks needs this */
-#include <console.h> /* ... and this */
-#endif
-#ifdef THINK_C
-#include <console.h> /* Think declares it here */
-#endif
-#endif
-
-
-/* Create the add-on message string table. */
-
-#define JMESSAGE(code,string) string ,
-
-static const char * const cdjpeg_message_table[] = {
-#include "cderror.h"
- NULL
-};
-
-
-/*
- * 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 (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(cjpeg_source_ptr)
-select_file_type (j_compress_ptr cinfo, FILE * infile)
-{
- int c;
-
- if (is_targa) {
-#ifdef TARGA_SUPPORTED
- return jinit_read_targa(cinfo);
-#else
- ERREXIT(cinfo, JERR_TGA_NOTCOMP);
-#endif
- }
-
- if ((c = getc(infile)) == EOF)
- ERREXIT(cinfo, JERR_INPUT_EMPTY);
- if (ungetc(c, infile) == EOF)
- ERREXIT(cinfo, JERR_UNGETC_FAILED);
-
- switch (c) {
-#ifdef BMP_SUPPORTED
- case 'B':
- return jinit_read_bmp(cinfo);
-#endif
-#ifdef GIF_SUPPORTED
- case 'G':
- return jinit_read_gif(cinfo);
-#endif
-#ifdef PPM_SUPPORTED
- case 'P':
- return jinit_read_ppm(cinfo);
-#endif
-#ifdef RLE_SUPPORTED
- case 'R':
- return jinit_read_rle(cinfo);
-#endif
-#ifdef TARGA_SUPPORTED
- case 0x00:
- return jinit_read_targa(cinfo);
-#endif
- default:
- ERREXIT(cinfo, JERR_UNKNOWN_FORMAT);
- break;
- }
-
- return NULL; /* suppress compiler warnings */
-}
-
-
-/*
- * 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 const char * progname; /* program name for error messages */
-static char * outfilename; /* for -outfile switch */
-
-
-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 C_PROGRESSIVE_SUPPORTED
- fprintf(stderr, " -progressive Create progressive JPEG file\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");
-#ifdef DCT_ISLOW_SUPPORTED
- fprintf(stderr, " -dct int Use integer DCT method%s\n",
- (JDCT_DEFAULT == JDCT_ISLOW ? " (default)" : ""));
-#endif
-#ifdef DCT_IFAST_SUPPORTED
- fprintf(stderr, " -dct fast Use fast integer DCT (less accurate)%s\n",
- (JDCT_DEFAULT == JDCT_IFAST ? " (default)" : ""));
-#endif
-#ifdef DCT_FLOAT_SUPPORTED
- fprintf(stderr, " -dct float Use floating-point DCT method%s\n",
- (JDCT_DEFAULT == JDCT_FLOAT ? " (default)" : ""));
-#endif
- 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, " -outfile name Specify name for output file\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
- fprintf(stderr, " -baseline Force baseline quantization tables\n");
- fprintf(stderr, " -qtables file Use quantization tables given in file\n");
- fprintf(stderr, " -qslots N[,...] Set component quantization tables\n");
- fprintf(stderr, " -sample HxV[,...] Set component sampling factors\n");
-#ifdef C_MULTISCAN_FILES_SUPPORTED
- fprintf(stderr, " -scans file Create multi-scan JPEG per script file\n");
-#endif
- exit(EXIT_FAILURE);
-}
-
-
-LOCAL(int)
-parse_switches (j_compress_ptr cinfo, int argc, char **argv,
- int last_file_arg_seen, boolean for_real)
-/* Parse optional 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.)
- * for_real is FALSE on the first (dummy) pass; we may skip any expensive
- * processing.
- */
-{
- int argn;
- char * arg;
- int quality; /* -quality parameter */
- int q_scale_factor; /* scaling percentage for -qtables */
- boolean force_baseline;
- boolean simple_progressive;
- char * qtablefile = NULL; /* saves -qtables filename if any */
- char * qslotsarg = NULL; /* saves -qslots parm if any */
- char * samplearg = NULL; /* saves -sample parm if any */
- char * scansarg = NULL; /* saves -scans parm if any */
-
- /* Set up default JPEG parameters. */
- /* Note that default -quality level need not, and does not,
- * match the default scaling for an explicit -qtables argument.
- */
- quality = 75; /* default -quality value */
- q_scale_factor = 100; /* default to no scaling for -qtables */
- force_baseline = FALSE; /* by default, allow 16-bit quantizers */
- simple_progressive = FALSE;
- is_targa = FALSE;
- outfilename = NULL;
- cinfo->err->trace_level = 0;
-
- /* 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) {
- outfilename = NULL; /* -outfile applies to just one input file */
- continue; /* ignore this name 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, "baseline", 1)) {
- /* Force baseline-compatible output (8-bit quantizer values). */
- force_baseline = TRUE;
-
- } else if (keymatch(arg, "dct", 2)) {
- /* Select DCT algorithm. */
- if (++argn >= argc) /* advance to next argument */
- usage();
- if (keymatch(argv[argn], "int", 1)) {
- cinfo->dct_method = JDCT_ISLOW;
- } else if (keymatch(argv[argn], "fast", 2)) {
- cinfo->dct_method = JDCT_IFAST;
- } else if (keymatch(argv[argn], "float", 2)) {
- cinfo->dct_method = JDCT_FLOAT;
- } else
- usage();
-
- } else if (keymatch(arg, "debug", 1) || keymatch(arg, "verbose", 1)) {
- /* Enable debug printouts. */
- /* On first -d, print version identification */
- static boolean printed_version = FALSE;
-
- if (! printed_version) {
- fprintf(stderr, "Independent JPEG Group's CJPEG, version %s\n%s\n",
- JVERSION, JCOPYRIGHT);
- printed_version = TRUE;
- }
- cinfo->err->trace_level++;
-
- } else if (keymatch(arg, "grayscale", 2) || keymatch(arg, "greyscale",2)) {
- /* Force a monochrome JPEG file to be generated. */
- jpeg_set_colorspace(cinfo, JCS_GRAYSCALE);
-
- } else if (keymatch(arg, "maxmemory", 3)) {
- /* 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->mem->max_memory_to_use = lval * 1000L;
-
- } 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, "outfile", 4)) {
- /* Set output file name. */
- if (++argn >= argc) /* advance to next argument */
- usage();
- outfilename = argv[argn]; /* save it away for later use */
-
- } else if (keymatch(arg, "progressive", 1)) {
- /* Select simple progressive mode. */
-#ifdef C_PROGRESSIVE_SUPPORTED
- simple_progressive = TRUE;
- /* We must postpone execution until num_components is known. */
-#else
- fprintf(stderr, "%s: sorry, progressive output was not compiled\n",
- progname);
- exit(EXIT_FAILURE);
-#endif
-
- } else if (keymatch(arg, "quality", 1)) {
- /* Quality factor (quantization table scaling factor). */
- if (++argn >= argc) /* advance to next argument */
- usage();
- if (sscanf(argv[argn], "%d", &quality) != 1)
- usage();
- /* Change scale factor in case -qtables is present. */
- q_scale_factor = jpeg_quality_scaling(quality);
-
- } else if (keymatch(arg, "qslots", 2)) {
- /* Quantization table slot numbers. */
- if (++argn >= argc) /* advance to next argument */
- usage();
- qslotsarg = argv[argn];
- /* Must delay setting qslots until after we have processed any
- * colorspace-determining switches, since jpeg_set_colorspace sets
- * default quant table numbers.
- */
-
- } 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 = (unsigned int) lval;
- cinfo->restart_in_rows = 0; /* else prior '-restart n' overrides me */
- } else {
- cinfo->restart_in_rows = (int) lval;
- /* restart_interval will be computed during startup */
- }
-
- } else if (keymatch(arg, "sample", 2)) {
- /* Set sampling factors. */
- if (++argn >= argc) /* advance to next argument */
- usage();
- samplearg = argv[argn];
- /* Must delay setting sample factors until after we have processed any
- * colorspace-determining switches, since jpeg_set_colorspace sets
- * default sampling factors.
- */
-
- } else if (keymatch(arg, "scans", 2)) {
- /* Set scan script. */
-#ifdef C_MULTISCAN_FILES_SUPPORTED
- if (++argn >= argc) /* advance to next argument */
- usage();
- scansarg = argv[argn];
- /* We must postpone reading the file in case -progressive appears. */
-#else
- fprintf(stderr, "%s: sorry, multi-scan output was not compiled\n",
- progname);
- exit(EXIT_FAILURE);
-#endif
-
- } 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 (for_real) {
-
- /* Set quantization tables for selected quality. */
- /* Some or all may be overridden if -qtables is present. */
- jpeg_set_quality(cinfo, quality, force_baseline);
-
- if (qtablefile != NULL) /* process -qtables if it was present */
- if (! read_quant_tables(cinfo, qtablefile,
- q_scale_factor, force_baseline))
- usage();
-
- if (qslotsarg != NULL) /* process -qslots if it was present */
- if (! set_quant_slots(cinfo, qslotsarg))
- usage();
-
- if (samplearg != NULL) /* process -sample if it was present */
- if (! set_sample_factors(cinfo, samplearg))
- usage();
-
-#ifdef C_PROGRESSIVE_SUPPORTED
- if (simple_progressive) /* process -progressive; -scans can override */
- jpeg_simple_progression(cinfo);
-#endif
-
-#ifdef C_MULTISCAN_FILES_SUPPORTED
- if (scansarg != NULL) /* process -scans if it was present */
- if (! read_scan_script(cinfo, scansarg))
- usage();
-#endif
- }
-
- return argn; /* return index of next arg (file name) */
-}
-
-
-/*
- * The main program.
- */
-
-int
-main (int argc, char **argv)
-{
- struct jpeg_compress_struct cinfo;
- struct jpeg_error_mgr jerr;
-#ifdef PROGRESS_REPORT
- struct cdjpeg_progress_mgr progress;
-#endif
- int file_index;
- cjpeg_source_ptr src_mgr;
- FILE * input_file;
- FILE * output_file;
- JDIMENSION num_scanlines;
-
- /* On Mac, fetch a command line. */
-#ifdef USE_CCOMMAND
- argc = ccommand(&argv);
-#endif
-
- progname = argv[0];
- if (progname == NULL || progname[0] == 0)
- progname = "cjpeg"; /* in case C library doesn't provide it */
-
- /* Initialize the JPEG compression object with default error handling. */
- cinfo.err = jpeg_std_error(&jerr);
- jpeg_create_compress(&cinfo);
- /* Add some application-specific error messages (from cderror.h) */
- jerr.addon_message_table = cdjpeg_message_table;
- jerr.first_addon_message = JMSG_FIRSTADDONCODE;
- jerr.last_addon_message = JMSG_LASTADDONCODE;
-
- /* Now safe to enable signal catcher. */
-#ifdef NEED_SIGNAL_CATCHER
- enable_signal_catcher((j_common_ptr) &cinfo);
-#endif
-
- /* Initialize JPEG parameters.
- * Much of this may be overridden later.
- * In particular, we don't yet know the input file's color space,
- * but we need to provide some value for jpeg_set_defaults() to work.
- */
-
- cinfo.in_color_space = JCS_RGB; /* arbitrary guess */
- jpeg_set_defaults(&cinfo);
-
- /* Scan command line to find file names.
- * It is convenient to use just one switch-parsing routine, but the switch
- * values read here are ignored; we will rescan the switches after opening
- * the input file.
- */
-
- file_index = parse_switches(&cinfo, argc, argv, 0, FALSE);
-
-#ifdef TWO_FILE_COMMANDLINE
- /* Must have either -outfile switch or explicit output file name */
- if (outfilename == NULL) {
- if (file_index != argc-2) {
- fprintf(stderr, "%s: must name one input and one output file\n",
- progname);
- usage();
- }
- outfilename = argv[file_index+1];
- } else {
- if (file_index != argc-1) {
- fprintf(stderr, "%s: must name one input and one output file\n",
- progname);
- usage();
- }
- }
-#else
- /* Unix style: expect zero or one file name */
- if (file_index < argc-1) {
- fprintf(stderr, "%s: only one input file\n", progname);
- usage();
- }
-#endif /* TWO_FILE_COMMANDLINE */
-
- /* Open the input file. */
- if (file_index < argc) {
- if ((input_file = fopen(argv[file_index], READ_BINARY)) == NULL) {
- fprintf(stderr, "%s: can't open %s\n", progname, argv[file_index]);
- exit(EXIT_FAILURE);
- }
- } else {
- /* default input file is stdin */
- input_file = read_stdin();
- }
-
- /* Open the output file. */
- if (outfilename != NULL) {
- if ((output_file = fopen(outfilename, WRITE_BINARY)) == NULL) {
- fprintf(stderr, "%s: can't open %s\n", progname, outfilename);
- exit(EXIT_FAILURE);
- }
- } else {
- /* default output file is stdout */
- output_file = write_stdout();
- }
-
-#ifdef PROGRESS_REPORT
- start_progress_monitor((j_common_ptr) &cinfo, &progress);
-#endif
-
- /* Figure out the input file format, and set up to read it. */
- src_mgr = select_file_type(&cinfo, input_file);
- src_mgr->input_file = input_file;
-
- /* Read the input file header to obtain file size & colorspace. */
- (*src_mgr->start_input) (&cinfo, src_mgr);
-
- /* Now that we know input colorspace, fix colorspace-dependent defaults */
- jpeg_default_colorspace(&cinfo);
-
- /* Adjust default compression parameters by re-parsing the options */
- file_index = parse_switches(&cinfo, argc, argv, 0, TRUE);
-
- /* Specify data destination for compression */
- jpeg_stdio_dest(&cinfo, output_file);
-
- /* Start compressor */
- jpeg_start_compress(&cinfo, TRUE);
-
- /* Process data */
- while (cinfo.next_scanline < cinfo.image_height) {
- num_scanlines = (*src_mgr->get_pixel_rows) (&cinfo, src_mgr);
- (void) jpeg_write_scanlines(&cinfo, src_mgr->buffer, num_scanlines);
- }
-
- /* Finish compression and release memory */
- (*src_mgr->finish_input) (&cinfo, src_mgr);
- jpeg_finish_compress(&cinfo);
- jpeg_destroy_compress(&cinfo);
-
- /* Close files, if we opened them */
- if (input_file != stdin)
- fclose(input_file);
- if (output_file != stdout)
- fclose(output_file);
-
-#ifdef PROGRESS_REPORT
- end_progress_monitor((j_common_ptr) &cinfo);
-#endif
-
- /* All done. */
- exit(jerr.num_warnings ? EXIT_WARNING : EXIT_SUCCESS);
- return 0; /* suppress no-return-value warnings */
-}
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