src/jpeg/jpegtran.c

/*
 * jpegtran.c
 *
 * Copyright (C) 1995-1997, 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 JPEG transcoding.
 * It is very similar to cjpeg.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 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
#if TRANSFORMS_SUPPORTED
  fprintf(stderr, "Switches for modifying the image:\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, "  -rotate [90|180|270]         Rotate image (degrees clockwise)\n");
  fprintf(stderr, "  -transpose     Transpose image\n");
  fprintf(stderr, "  -transverse    Transverse transpose image\n");
  fprintf(stderr, "  -trim          Drop non-transformable edge blocks\n");
#endif /* TRANSFORMS_SUPPORTED */
  fprintf(stderr, "Switches for advanced users:\n");
  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_ARITH_CODING_SUPPORTED
  fprintf(stderr, "  -arithmetic    Use arithmetic coding\n");
#endif
#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, wxjpeg_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;
  wxjpeg_boolean simple_progressive;
  char * scansarg = NULL;	/* saves -scans parm if any */

  /* Set up default JPEG parameters. */
  simple_progressive = FALSE;
  outfilename = NULL;
  copyoption = JCOPYOPT_DEFAULT;
  transformoption.transform = JXFORM_NONE;
  transformoption.trim = FALSE;
  transformoption.force_grayscale = 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", 1)) {
      /* 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, "debug", 1) || keymatch(arg, "verbose", 1)) {
      /* Enable debug printouts. */
      /* On first -d, print version identification */
      static wxjpeg_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, "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, "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, "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;
  FILE * input_file;
  FILE * output_file;

  /* 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 ((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) &dstinfo, &progress);
#endif

  /* Specify data source for decompression */
  jpeg_stdio_src(&srcinfo, input_file);

  /* Enable saving of extra markers that we want to copy */
  jcopy_markers_setup(&srcinfo, copyoption);

  /* Read file header */
  (void) jpeg_read_header(&srcinfo, TRUE);

  /* 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
  jtransform_request_workspace(&srcinfo, &transformoption);
#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

  /* 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, output_file);

  /* 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 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) &dstinfo);
#endif

  /* All done. */
  exit(jsrcerr.num_warnings + jdsterr.num_warnings ?EXIT_WARNING:EXIT_SUCCESS);
  return 0;			/* suppress no-return-value warnings */
}
Commit	Line	Data
	1	/*
	2	* jpegtran.c
	3	*
	4	* Copyright (C) 1995-1997, Thomas G. Lane.
	5	* This file is part of the Independent JPEG Group's software.
	6	* For conditions of distribution and use, see the accompanying README file.
	7	*
	8	* This file contains a command-line user interface for JPEG transcoding.
	9	* It is very similar to cjpeg.c, but provides lossless transcoding between
	10	* different JPEG file formats. It also provides some lossless and sort-of-
	11	* lossless transformations of JPEG data.
	12	*/
	13
	14	#include "cdjpeg.h" /* Common decls for cjpeg/djpeg applications */
	15	#include "transupp.h" /* Support routines for jpegtran */
	16	#include "jversion.h" /* for version message */
	17
	18	#ifdef USE_CCOMMAND /* command-line reader for Macintosh */
	19	#ifdef __MWERKS__
	20	#include <SIOUX.h> /* Metrowerks needs this */
	21	#include <console.h> /* ... and this */
	22	#endif
	23	#ifdef THINK_C
	24	#include <console.h> /* Think declares it here */
	25	#endif
	26	#endif
	27
	28
	29	/*
	30	* Argument-parsing code.
	31	* The switch parser is designed to be useful with DOS-style command line
	32	* syntax, ie, intermixed switches and file names, where only the switches
	33	* to the left of a given file name affect processing of that file.
	34	* The main program in this file doesn't actually use this capability...
	35	*/
	36
	37
	38	static const char * progname; /* program name for error messages */
	39	static char * outfilename; /* for -outfile switch */
	40	static JCOPY_OPTION copyoption; /* -copy switch */
	41	static jpeg_transform_info transformoption; /* image transformation options */
	42
	43
	44	LOCAL(void)
	45	usage (void)
	46	/* complain about bad command line */
	47	{
	48	fprintf(stderr, "usage: %s [switches] ", progname);
	49	#ifdef TWO_FILE_COMMANDLINE
	50	fprintf(stderr, "inputfile outputfile\n");
	51	#else
	52	fprintf(stderr, "[inputfile]\n");
	53	#endif
	54
	55	fprintf(stderr, "Switches (names may be abbreviated):\n");
	56	fprintf(stderr, " -copy none Copy no extra markers from source file\n");
	57	fprintf(stderr, " -copy comments Copy only comment markers (default)\n");
	58	fprintf(stderr, " -copy all Copy all extra markers\n");
	59	#ifdef ENTROPY_OPT_SUPPORTED
	60	fprintf(stderr, " -optimize Optimize Huffman table (smaller file, but slow compression)\n");
	61	#endif
	62	#ifdef C_PROGRESSIVE_SUPPORTED
	63	fprintf(stderr, " -progressive Create progressive JPEG file\n");
	64	#endif
	65	#if TRANSFORMS_SUPPORTED
	66	fprintf(stderr, "Switches for modifying the image:\n");
	67	fprintf(stderr, " -grayscale Reduce to grayscale (omit color data)\n");
	68	fprintf(stderr, " -flip [horizontal\|vertical] Mirror image (left-right or top-bottom)\n");
	69	fprintf(stderr, " -rotate [90\|180\|270] Rotate image (degrees clockwise)\n");
	70	fprintf(stderr, " -transpose Transpose image\n");
	71	fprintf(stderr, " -transverse Transverse transpose image\n");
	72	fprintf(stderr, " -trim Drop non-transformable edge blocks\n");
	73	#endif /* TRANSFORMS_SUPPORTED */
	74	fprintf(stderr, "Switches for advanced users:\n");
	75	fprintf(stderr, " -restart N Set restart interval in rows, or in blocks with B\n");
	76	fprintf(stderr, " -maxmemory N Maximum memory to use (in kbytes)\n");
	77	fprintf(stderr, " -outfile name Specify name for output file\n");
	78	fprintf(stderr, " -verbose or -debug Emit debug output\n");
	79	fprintf(stderr, "Switches for wizards:\n");
	80	#ifdef C_ARITH_CODING_SUPPORTED
	81	fprintf(stderr, " -arithmetic Use arithmetic coding\n");
	82	#endif
	83	#ifdef C_MULTISCAN_FILES_SUPPORTED
	84	fprintf(stderr, " -scans file Create multi-scan JPEG per script file\n");
	85	#endif
	86	exit(EXIT_FAILURE);
	87	}
	88
	89
	90	LOCAL(void)
	91	select_transform (JXFORM_CODE transform)
	92	/* Silly little routine to detect multiple transform options,
	93	* which we can't handle.
	94	*/
	95	{
	96	#if TRANSFORMS_SUPPORTED
	97	if (transformoption.transform == JXFORM_NONE \|\|
	98	transformoption.transform == transform) {
	99	transformoption.transform = transform;
	100	} else {
	101	fprintf(stderr, "%s: can only do one image transformation at a time\n",
	102	progname);
	103	usage();
	104	}
	105	#else
	106	fprintf(stderr, "%s: sorry, image transformation was not compiled\n",
	107	progname);
	108	exit(EXIT_FAILURE);
	109	#endif
	110	}
	111
	112
	113	LOCAL(int)
	114	parse_switches (j_compress_ptr cinfo, int argc, char **argv,
	115	int last_file_arg_seen, wxjpeg_boolean for_real)
	116	/* Parse optional switches.
	117	* Returns argv[] index of first file-name argument (== argc if none).
	118	* Any file names with indexes <= last_file_arg_seen are ignored;
	119	* they have presumably been processed in a previous iteration.
	120	* (Pass 0 for last_file_arg_seen on the first or only iteration.)
	121	* for_real is FALSE on the first (dummy) pass; we may skip any expensive
	122	* processing.
	123	*/
	124	{
	125	int argn;
	126	char * arg;
	127	wxjpeg_boolean simple_progressive;
	128	char * scansarg = NULL; /* saves -scans parm if any */
	129
	130	/* Set up default JPEG parameters. */
	131	simple_progressive = FALSE;
	132	outfilename = NULL;
	133	copyoption = JCOPYOPT_DEFAULT;
	134	transformoption.transform = JXFORM_NONE;
	135	transformoption.trim = FALSE;
	136	transformoption.force_grayscale = FALSE;
	137	cinfo->err->trace_level = 0;
	138
	139	/* Scan command line options, adjust parameters */
	140
	141	for (argn = 1; argn < argc; argn++) {
	142	arg = argv[argn];
	143	if (*arg != '-') {
	144	/* Not a switch, must be a file name argument */
	145	if (argn <= last_file_arg_seen) {
	146	outfilename = NULL; /* -outfile applies to just one input file */
	147	continue; /* ignore this name if previously processed */
	148	}
	149	break; /* else done parsing switches */
	150	}
	151	arg++; /* advance past switch marker character */
	152
	153	if (keymatch(arg, "arithmetic", 1)) {
	154	/* Use arithmetic coding. */
	155	#ifdef C_ARITH_CODING_SUPPORTED
	156	cinfo->arith_code = TRUE;
	157	#else
	158	fprintf(stderr, "%s: sorry, arithmetic coding not supported\n",
	159	progname);
	160	exit(EXIT_FAILURE);
	161	#endif
	162
	163	} else if (keymatch(arg, "copy", 1)) {
	164	/* Select which extra markers to copy. */
	165	if (++argn >= argc) /* advance to next argument */
	166	usage();
	167	if (keymatch(argv[argn], "none", 1)) {
	168	copyoption = JCOPYOPT_NONE;
	169	} else if (keymatch(argv[argn], "comments", 1)) {
	170	copyoption = JCOPYOPT_COMMENTS;
	171	} else if (keymatch(argv[argn], "all", 1)) {
	172	copyoption = JCOPYOPT_ALL;
	173	} else
	174	usage();
	175
	176	} else if (keymatch(arg, "debug", 1) \|\| keymatch(arg, "verbose", 1)) {
	177	/* Enable debug printouts. */
	178	/* On first -d, print version identification */
	179	static wxjpeg_boolean printed_version = FALSE;
	180
	181	if (! printed_version) {
	182	fprintf(stderr, "Independent JPEG Group's JPEGTRAN, version %s\n%s\n",
	183	JVERSION, JCOPYRIGHT);
	184	printed_version = TRUE;
	185	}
	186	cinfo->err->trace_level++;
	187
	188	} else if (keymatch(arg, "flip", 1)) {
	189	/* Mirror left-right or top-bottom. */
	190	if (++argn >= argc) /* advance to next argument */
	191	usage();
	192	if (keymatch(argv[argn], "horizontal", 1))
	193	select_transform(JXFORM_FLIP_H);
	194	else if (keymatch(argv[argn], "vertical", 1))
	195	select_transform(JXFORM_FLIP_V);
	196	else
	197	usage();
	198
	199	} else if (keymatch(arg, "grayscale", 1) \|\| keymatch(arg, "greyscale",1)) {
	200	/* Force to grayscale. */
	201	#if TRANSFORMS_SUPPORTED
	202	transformoption.force_grayscale = TRUE;
	203	#else
	204	select_transform(JXFORM_NONE); /* force an error */
	205	#endif
	206
	207	} else if (keymatch(arg, "maxmemory", 3)) {
	208	/* Maximum memory in Kb (or Mb with 'm'). */
	209	long lval;
	210	char ch = 'x';
	211
	212	if (++argn >= argc) /* advance to next argument */
	213	usage();
	214	if (sscanf(argv[argn], "%ld%c", &lval, &ch) < 1)
	215	usage();
	216	if (ch == 'm' \|\| ch == 'M')
	217	lval *= 1000L;
	218	cinfo->mem->max_memory_to_use = lval * 1000L;
	219
	220	} else if (keymatch(arg, "optimize", 1) \|\| keymatch(arg, "optimise", 1)) {
	221	/* Enable entropy parm optimization. */
	222	#ifdef ENTROPY_OPT_SUPPORTED
	223	cinfo->optimize_coding = TRUE;
	224	#else
	225	fprintf(stderr, "%s: sorry, entropy optimization was not compiled\n",
	226	progname);
	227	exit(EXIT_FAILURE);
	228	#endif
	229
	230	} else if (keymatch(arg, "outfile", 4)) {
	231	/* Set output file name. */
	232	if (++argn >= argc) /* advance to next argument */
	233	usage();
	234	outfilename = argv[argn]; /* save it away for later use */
	235
	236	} else if (keymatch(arg, "progressive", 1)) {
	237	/* Select simple progressive mode. */
	238	#ifdef C_PROGRESSIVE_SUPPORTED
	239	simple_progressive = TRUE;
	240	/* We must postpone execution until num_components is known. */
	241	#else
	242	fprintf(stderr, "%s: sorry, progressive output was not compiled\n",
	243	progname);
	244	exit(EXIT_FAILURE);
	245	#endif
	246
	247	} else if (keymatch(arg, "restart", 1)) {
	248	/* Restart interval in MCU rows (or in MCUs with 'b'). */
	249	long lval;
	250	char ch = 'x';
	251
	252	if (++argn >= argc) /* advance to next argument */
	253	usage();
	254	if (sscanf(argv[argn], "%ld%c", &lval, &ch) < 1)
	255	usage();
	256	if (lval < 0 \|\| lval > 65535L)
	257	usage();
	258	if (ch == 'b' \|\| ch == 'B') {
	259	cinfo->restart_interval = (unsigned int) lval;
	260	cinfo->restart_in_rows = 0; /* else prior '-restart n' overrides me */
	261	} else {
	262	cinfo->restart_in_rows = (int) lval;
	263	/* restart_interval will be computed during startup */
	264	}
	265
	266	} else if (keymatch(arg, "rotate", 2)) {
	267	/* Rotate 90, 180, or 270 degrees (measured clockwise). */
	268	if (++argn >= argc) /* advance to next argument */
	269	usage();
	270	if (keymatch(argv[argn], "90", 2))
	271	select_transform(JXFORM_ROT_90);
	272	else if (keymatch(argv[argn], "180", 3))
	273	select_transform(JXFORM_ROT_180);
	274	else if (keymatch(argv[argn], "270", 3))
	275	select_transform(JXFORM_ROT_270);
	276	else
	277	usage();
	278
	279	} else if (keymatch(arg, "scans", 1)) {
	280	/* Set scan script. */
	281	#ifdef C_MULTISCAN_FILES_SUPPORTED
	282	if (++argn >= argc) /* advance to next argument */
	283	usage();
	284	scansarg = argv[argn];
	285	/* We must postpone reading the file in case -progressive appears. */
	286	#else
	287	fprintf(stderr, "%s: sorry, multi-scan output was not compiled\n",
	288	progname);
	289	exit(EXIT_FAILURE);
	290	#endif
	291
	292	} else if (keymatch(arg, "transpose", 1)) {
	293	/* Transpose (across UL-to-LR axis). */
	294	select_transform(JXFORM_TRANSPOSE);
	295
	296	} else if (keymatch(arg, "transverse", 6)) {
	297	/* Transverse transpose (across UR-to-LL axis). */
	298	select_transform(JXFORM_TRANSVERSE);
	299
	300	} else if (keymatch(arg, "trim", 3)) {
	301	/* Trim off any partial edge MCUs that the transform can't handle. */
	302	transformoption.trim = TRUE;
	303
	304	} else {
	305	usage(); /* bogus switch */
	306	}
	307	}
	308
	309	/* Post-switch-scanning cleanup */
	310
	311	if (for_real) {
	312
	313	#ifdef C_PROGRESSIVE_SUPPORTED
	314	if (simple_progressive) /* process -progressive; -scans can override */
	315	jpeg_simple_progression(cinfo);
	316	#endif
	317
	318	#ifdef C_MULTISCAN_FILES_SUPPORTED
	319	if (scansarg != NULL) /* process -scans if it was present */
	320	if (! read_scan_script(cinfo, scansarg))
	321	usage();
	322	#endif
	323	}
	324
	325	return argn; /* return index of next arg (file name) */
	326	}
	327
	328
	329	/*
	330	* The main program.
	331	*/
	332
	333	int
	334	main (int argc, char **argv)
	335	{
	336	struct jpeg_decompress_struct srcinfo;
	337	struct jpeg_compress_struct dstinfo;
	338	struct jpeg_error_mgr jsrcerr, jdsterr;
	339	#ifdef PROGRESS_REPORT
	340	struct cdjpeg_progress_mgr progress;
	341	#endif
	342	jvirt_barray_ptr * src_coef_arrays;
	343	jvirt_barray_ptr * dst_coef_arrays;
	344	int file_index;
	345	FILE * input_file;
	346	FILE * output_file;
	347
	348	/* On Mac, fetch a command line. */
	349	#ifdef USE_CCOMMAND
	350	argc = ccommand(&argv);
	351	#endif
	352
	353	progname = argv[0];
	354	if (progname == NULL \|\| progname[0] == 0)
	355	progname = "jpegtran"; /* in case C library doesn't provide it */
	356
	357	/* Initialize the JPEG decompression object with default error handling. */
	358	srcinfo.err = jpeg_std_error(&jsrcerr);
	359	jpeg_create_decompress(&srcinfo);
	360	/* Initialize the JPEG compression object with default error handling. */
	361	dstinfo.err = jpeg_std_error(&jdsterr);
	362	jpeg_create_compress(&dstinfo);
	363
	364	/* Now safe to enable signal catcher.
	365	* Note: we assume only the decompression object will have virtual arrays.
	366	*/
	367	#ifdef NEED_SIGNAL_CATCHER
	368	enable_signal_catcher((j_common_ptr) &srcinfo);
	369	#endif
	370
	371	/* Scan command line to find file names.
	372	* It is convenient to use just one switch-parsing routine, but the switch
	373	* values read here are mostly ignored; we will rescan the switches after
	374	* opening the input file. Also note that most of the switches affect the
	375	* destination JPEG object, so we parse into that and then copy over what
	376	* needs to affects the source too.
	377	*/
	378
	379	file_index = parse_switches(&dstinfo, argc, argv, 0, FALSE);
	380	jsrcerr.trace_level = jdsterr.trace_level;
	381	srcinfo.mem->max_memory_to_use = dstinfo.mem->max_memory_to_use;
	382
	383	#ifdef TWO_FILE_COMMANDLINE
	384	/* Must have either -outfile switch or explicit output file name */
	385	if (outfilename == NULL) {
	386	if (file_index != argc-2) {
	387	fprintf(stderr, "%s: must name one input and one output file\n",
	388	progname);
	389	usage();
	390	}
	391	outfilename = argv[file_index+1];
	392	} else {
	393	if (file_index != argc-1) {
	394	fprintf(stderr, "%s: must name one input and one output file\n",
	395	progname);
	396	usage();
	397	}
	398	}
	399	#else
	400	/* Unix style: expect zero or one file name */
	401	if (file_index < argc-1) {
	402	fprintf(stderr, "%s: only one input file\n", progname);
	403	usage();
	404	}
	405	#endif /* TWO_FILE_COMMANDLINE */
	406
	407	/* Open the input file. */
	408	if (file_index < argc) {
	409	if ((input_file = fopen(argv[file_index], READ_BINARY)) == NULL) {
	410	fprintf(stderr, "%s: can't open %s\n", progname, argv[file_index]);
	411	exit(EXIT_FAILURE);
	412	}
	413	} else {
	414	/* default input file is stdin */
	415	input_file = read_stdin();
	416	}
	417
	418	/* Open the output file. */
	419	if (outfilename != NULL) {
	420	if ((output_file = fopen(outfilename, WRITE_BINARY)) == NULL) {
	421	fprintf(stderr, "%s: can't open %s\n", progname, outfilename);
	422	exit(EXIT_FAILURE);
	423	}
	424	} else {
	425	/* default output file is stdout */
	426	output_file = write_stdout();
	427	}
	428
	429	#ifdef PROGRESS_REPORT
	430	start_progress_monitor((j_common_ptr) &dstinfo, &progress);
	431	#endif
	432
	433	/* Specify data source for decompression */
	434	jpeg_stdio_src(&srcinfo, input_file);
	435
	436	/* Enable saving of extra markers that we want to copy */
	437	jcopy_markers_setup(&srcinfo, copyoption);
	438
	439	/* Read file header */
	440	(void) jpeg_read_header(&srcinfo, TRUE);
	441
	442	/* Any space needed by a transform option must be requested before
	443	* jpeg_read_coefficients so that memory allocation will be done right.
	444	*/
	445	#if TRANSFORMS_SUPPORTED
	446	jtransform_request_workspace(&srcinfo, &transformoption);
	447	#endif
	448
	449	/* Read source file as DCT coefficients */
	450	src_coef_arrays = jpeg_read_coefficients(&srcinfo);
	451
	452	/* Initialize destination compression parameters from source values */
	453	jpeg_copy_critical_parameters(&srcinfo, &dstinfo);
	454
	455	/* Adjust destination parameters if required by transform options;
	456	* also find out which set of coefficient arrays will hold the output.
	457	*/
	458	#if TRANSFORMS_SUPPORTED
	459	dst_coef_arrays = jtransform_adjust_parameters(&srcinfo, &dstinfo,
	460	src_coef_arrays,
	461	&transformoption);
	462	#else
	463	dst_coef_arrays = src_coef_arrays;
	464	#endif
	465
	466	/* Adjust default compression parameters by re-parsing the options */
	467	file_index = parse_switches(&dstinfo, argc, argv, 0, TRUE);
	468
	469	/* Specify data destination for compression */
	470	jpeg_stdio_dest(&dstinfo, output_file);
	471
	472	/* Start compressor (note no image data is actually written here) */
	473	jpeg_write_coefficients(&dstinfo, dst_coef_arrays);
	474
	475	/* Copy to the output file any extra markers that we want to preserve */
	476	jcopy_markers_execute(&srcinfo, &dstinfo, copyoption);
	477
	478	/* Execute image transformation, if any */
	479	#if TRANSFORMS_SUPPORTED
	480	jtransform_execute_transformation(&srcinfo, &dstinfo,
	481	src_coef_arrays,
	482	&transformoption);
	483	#endif
	484
	485	/* Finish compression and release memory */
	486	jpeg_finish_compress(&dstinfo);
	487	jpeg_destroy_compress(&dstinfo);
	488	(void) jpeg_finish_decompress(&srcinfo);
	489	jpeg_destroy_decompress(&srcinfo);
	490
	491	/* Close files, if we opened them */
	492	if (input_file != stdin)
	493	fclose(input_file);
	494	if (output_file != stdout)
	495	fclose(output_file);
	496
	497	#ifdef PROGRESS_REPORT
	498	end_progress_monitor((j_common_ptr) &dstinfo);
	499	#endif
	500
	501	/* All done. */
	502	exit(jsrcerr.num_warnings + jdsterr.num_warnings ?EXIT_WARNING:EXIT_SUCCESS);
	503	return 0; /* suppress no-return-value warnings */
	504	}