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-rw-r--r--jpeg/jpegtran.c560
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diff --git a/jpeg/jpegtran.c b/jpeg/jpegtran.c
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@@ -1,560 +0,0 @@
-/*
- * jpegtran.c
- *
- * Copyright (C) 1995-2011, Thomas G. Lane, Guido Vollbeding.
- * 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 JPEG transcoding.
- * It is very similar to cjpeg.c, and partly to djpeg.c, but provides
- * lossless transcoding between different JPEG file formats. It also
- * provides some lossless and sort-of-lossless transformations of JPEG data.
- */
-
-#include "cdjpeg.h" /* Common decls for cjpeg/djpeg applications */
-#include "transupp.h" /* Support routines for jpegtran */
-#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
-
-
-/*
- * 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 */
-static char * scaleoption; /* -scale switch */
-static JCOPY_OPTION copyoption; /* -copy switch */
-static jpeg_transform_info transformoption; /* image transformation options */
-
-
-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, " -copy none Copy no extra markers from source file\n");
- fprintf(stderr, " -copy comments Copy only comment markers (default)\n");
- fprintf(stderr, " -copy all Copy all extra markers\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
- fprintf(stderr, "Switches for modifying the image:\n");
-#if TRANSFORMS_SUPPORTED
- fprintf(stderr, " -crop WxH+X+Y Crop to a rectangular subarea\n");
- fprintf(stderr, " -grayscale Reduce to grayscale (omit color data)\n");
- fprintf(stderr, " -flip [horizontal|vertical] Mirror image (left-right or top-bottom)\n");
- fprintf(stderr, " -perfect Fail if there is non-transformable edge blocks\n");
- fprintf(stderr, " -rotate [90|180|270] Rotate image (degrees clockwise)\n");
-#endif
- fprintf(stderr, " -scale M/N Scale output image by fraction M/N, eg, 1/8\n");
-#if TRANSFORMS_SUPPORTED
- fprintf(stderr, " -transpose Transpose image\n");
- fprintf(stderr, " -transverse Transverse transpose image\n");
- fprintf(stderr, " -trim Drop non-transformable edge blocks\n");
-#endif
- fprintf(stderr, "Switches for advanced users:\n");
-#ifdef C_ARITH_CODING_SUPPORTED
- fprintf(stderr, " -arithmetic Use arithmetic coding\n");
-#endif
- fprintf(stderr, " -restart N Set restart interval in rows, or in blocks with B\n");
- 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_MULTISCAN_FILES_SUPPORTED
- fprintf(stderr, " -scans file Create multi-scan JPEG per script file\n");
-#endif
- exit(EXIT_FAILURE);
-}
-
-
-LOCAL(void)
-select_transform (JXFORM_CODE transform)
-/* Silly little routine to detect multiple transform options,
- * which we can't handle.
- */
-{
-#if TRANSFORMS_SUPPORTED
- if (transformoption.transform == JXFORM_NONE ||
- transformoption.transform == transform) {
- transformoption.transform = transform;
- } else {
- fprintf(stderr, "%s: can only do one image transformation at a time\n",
- progname);
- usage();
- }
-#else
- fprintf(stderr, "%s: sorry, image transformation was not compiled\n",
- progname);
- exit(EXIT_FAILURE);
-#endif
-}
-
-
-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;
- boolean simple_progressive;
- char * scansarg = NULL; /* saves -scans parm if any */
-
- /* Set up default JPEG parameters. */
- simple_progressive = FALSE;
- outfilename = NULL;
- scaleoption = NULL;
- copyoption = JCOPYOPT_DEFAULT;
- transformoption.transform = JXFORM_NONE;
- transformoption.perfect = FALSE;
- transformoption.trim = FALSE;
- transformoption.force_grayscale = FALSE;
- transformoption.crop = FALSE;
- 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, "copy", 2)) {
- /* Select which extra markers to copy. */
- if (++argn >= argc) /* advance to next argument */
- usage();
- if (keymatch(argv[argn], "none", 1)) {
- copyoption = JCOPYOPT_NONE;
- } else if (keymatch(argv[argn], "comments", 1)) {
- copyoption = JCOPYOPT_COMMENTS;
- } else if (keymatch(argv[argn], "all", 1)) {
- copyoption = JCOPYOPT_ALL;
- } else
- usage();
-
- } else if (keymatch(arg, "crop", 2)) {
- /* Perform lossless cropping. */
-#if TRANSFORMS_SUPPORTED
- if (++argn >= argc) /* advance to next argument */
- usage();
- if (! jtransform_parse_crop_spec(&transformoption, argv[argn])) {
- fprintf(stderr, "%s: bogus -crop argument '%s'\n",
- progname, argv[argn]);
- exit(EXIT_FAILURE);
- }
-#else
- select_transform(JXFORM_NONE); /* force an error */
-#endif
-
- } 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 JPEGTRAN, version %s\n%s\n",
- JVERSION, JCOPYRIGHT);
- printed_version = TRUE;
- }
- cinfo->err->trace_level++;
-
- } else if (keymatch(arg, "flip", 1)) {
- /* Mirror left-right or top-bottom. */
- if (++argn >= argc) /* advance to next argument */
- usage();
- if (keymatch(argv[argn], "horizontal", 1))
- select_transform(JXFORM_FLIP_H);
- else if (keymatch(argv[argn], "vertical", 1))
- select_transform(JXFORM_FLIP_V);
- else
- usage();
-
- } else if (keymatch(arg, "grayscale", 1) || keymatch(arg, "greyscale",1)) {
- /* Force to grayscale. */
-#if TRANSFORMS_SUPPORTED
- transformoption.force_grayscale = TRUE;
-#else
- select_transform(JXFORM_NONE); /* force an error */
-#endif
-
- } 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, "perfect", 2)) {
- /* Fail if there is any partial edge MCUs that the transform can't
- * handle. */
- transformoption.perfect = TRUE;
-
- } else if (keymatch(arg, "progressive", 2)) {
- /* 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, "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, "rotate", 2)) {
- /* Rotate 90, 180, or 270 degrees (measured clockwise). */
- if (++argn >= argc) /* advance to next argument */
- usage();
- if (keymatch(argv[argn], "90", 2))
- select_transform(JXFORM_ROT_90);
- else if (keymatch(argv[argn], "180", 3))
- select_transform(JXFORM_ROT_180);
- else if (keymatch(argv[argn], "270", 3))
- select_transform(JXFORM_ROT_270);
- else
- usage();
-
- } else if (keymatch(arg, "scale", 4)) {
- /* Scale the output image by a fraction M/N. */
- if (++argn >= argc) /* advance to next argument */
- usage();
- scaleoption = argv[argn];
- /* We must postpone processing until decompression startup. */
-
- } else if (keymatch(arg, "scans", 1)) {
- /* 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, "transpose", 1)) {
- /* Transpose (across UL-to-LR axis). */
- select_transform(JXFORM_TRANSPOSE);
-
- } else if (keymatch(arg, "transverse", 6)) {
- /* Transverse transpose (across UR-to-LL axis). */
- select_transform(JXFORM_TRANSVERSE);
-
- } else if (keymatch(arg, "trim", 3)) {
- /* Trim off any partial edge MCUs that the transform can't handle. */
- transformoption.trim = TRUE;
-
- } else {
- usage(); /* bogus switch */
- }
- }
-
- /* Post-switch-scanning cleanup */
-
- if (for_real) {
-
-#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_decompress_struct srcinfo;
- struct jpeg_compress_struct dstinfo;
- struct jpeg_error_mgr jsrcerr, jdsterr;
-#ifdef PROGRESS_REPORT
- struct cdjpeg_progress_mgr progress;
-#endif
- jvirt_barray_ptr * src_coef_arrays;
- jvirt_barray_ptr * dst_coef_arrays;
- int file_index;
- /* We assume all-in-memory processing and can therefore use only a
- * single file pointer for sequential input and output operation.
- */
- FILE * fp;
-
- /* On Mac, fetch a command line. */
-#ifdef USE_CCOMMAND
- argc = ccommand(&argv);
-#endif
-
- progname = argv[0];
- if (progname == NULL || progname[0] == 0)
- progname = "jpegtran"; /* in case C library doesn't provide it */
-
- /* Initialize the JPEG decompression object with default error handling. */
- srcinfo.err = jpeg_std_error(&jsrcerr);
- jpeg_create_decompress(&srcinfo);
- /* Initialize the JPEG compression object with default error handling. */
- dstinfo.err = jpeg_std_error(&jdsterr);
- jpeg_create_compress(&dstinfo);
-
- /* Now safe to enable signal catcher.
- * Note: we assume only the decompression object will have virtual arrays.
- */
-#ifdef NEED_SIGNAL_CATCHER
- enable_signal_catcher((j_common_ptr) &srcinfo);
-#endif
-
- /* Scan command line to find file names.
- * It is convenient to use just one switch-parsing routine, but the switch
- * values read here are mostly ignored; we will rescan the switches after
- * opening the input file. Also note that most of the switches affect the
- * destination JPEG object, so we parse into that and then copy over what
- * needs to affects the source too.
- */
-
- file_index = parse_switches(&dstinfo, argc, argv, 0, FALSE);
- jsrcerr.trace_level = jdsterr.trace_level;
- srcinfo.mem->max_memory_to_use = dstinfo.mem->max_memory_to_use;
-
-#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 ((fp = fopen(argv[file_index], READ_BINARY)) == NULL) {
- fprintf(stderr, "%s: can't open %s for reading\n", progname, argv[file_index]);
- exit(EXIT_FAILURE);
- }
- } else {
- /* default input file is stdin */
- fp = read_stdin();
- }
-
-#ifdef PROGRESS_REPORT
- start_progress_monitor((j_common_ptr) &dstinfo, &progress);
-#endif
-
- /* Specify data source for decompression */
- jpeg_stdio_src(&srcinfo, fp);
-
- /* Enable saving of extra markers that we want to copy */
- jcopy_markers_setup(&srcinfo, copyoption);
-
- /* Read file header */
- (void) jpeg_read_header(&srcinfo, TRUE);
-
- /* Adjust default decompression parameters */
- if (scaleoption != NULL)
- if (sscanf(scaleoption, "%d/%d",
- &srcinfo.scale_num, &srcinfo.scale_denom) < 1)
- usage();
-
- /* Any space needed by a transform option must be requested before
- * jpeg_read_coefficients so that memory allocation will be done right.
- */
-#if TRANSFORMS_SUPPORTED
- /* Fail right away if -perfect is given and transformation is not perfect.
- */
- if (!jtransform_request_workspace(&srcinfo, &transformoption)) {
- fprintf(stderr, "%s: transformation is not perfect\n", progname);
- exit(EXIT_FAILURE);
- }
-#endif
-
- /* Read source file as DCT coefficients */
- src_coef_arrays = jpeg_read_coefficients(&srcinfo);
-
- /* Initialize destination compression parameters from source values */
- jpeg_copy_critical_parameters(&srcinfo, &dstinfo);
-
- /* Adjust destination parameters if required by transform options;
- * also find out which set of coefficient arrays will hold the output.
- */
-#if TRANSFORMS_SUPPORTED
- dst_coef_arrays = jtransform_adjust_parameters(&srcinfo, &dstinfo,
- src_coef_arrays,
- &transformoption);
-#else
- dst_coef_arrays = src_coef_arrays;
-#endif
-
- /* Close input file, if we opened it.
- * Note: we assume that jpeg_read_coefficients consumed all input
- * until JPEG_REACHED_EOI, and that jpeg_finish_decompress will
- * only consume more while (! cinfo->inputctl->eoi_reached).
- * We cannot call jpeg_finish_decompress here since we still need the
- * virtual arrays allocated from the source object for processing.
- */
- if (fp != stdin)
- fclose(fp);
-
- /* Open the output file. */
- if (outfilename != NULL) {
- if ((fp = fopen(outfilename, WRITE_BINARY)) == NULL) {
- fprintf(stderr, "%s: can't open %s for writing\n", progname, outfilename);
- exit(EXIT_FAILURE);
- }
- } else {
- /* default output file is stdout */
- fp = write_stdout();
- }
-
- /* Adjust default compression parameters by re-parsing the options */
- file_index = parse_switches(&dstinfo, argc, argv, 0, TRUE);
-
- /* Specify data destination for compression */
- jpeg_stdio_dest(&dstinfo, fp);
-
- /* Start compressor (note no image data is actually written here) */
- jpeg_write_coefficients(&dstinfo, dst_coef_arrays);
-
- /* Copy to the output file any extra markers that we want to preserve */
- jcopy_markers_execute(&srcinfo, &dstinfo, copyoption);
-
- /* Execute image transformation, if any */
-#if TRANSFORMS_SUPPORTED
- jtransform_execute_transformation(&srcinfo, &dstinfo,
- src_coef_arrays,
- &transformoption);
-#endif
-
- /* Finish compression and release memory */
- jpeg_finish_compress(&dstinfo);
- jpeg_destroy_compress(&dstinfo);
- (void) jpeg_finish_decompress(&srcinfo);
- jpeg_destroy_decompress(&srcinfo);
-
- /* Close output file, if we opened it */
- if (fp != stdout)
- fclose(fp);
-
-#ifdef PROGRESS_REPORT
- end_progress_monitor((j_common_ptr) &dstinfo);
-#endif
-
- /* All done. */
- exit(jsrcerr.num_warnings + jdsterr.num_warnings ?EXIT_WARNING:EXIT_SUCCESS);
- return 0; /* suppress no-return-value warnings */
-}
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