Intermediate changes

commit_hash:79edafb911368bba0a4d2f7f151a6c8a37c349f3

1 files changed, 941 insertions, 0 deletions

diff --git a/contrib/libs/libjpeg-turbo/src/djpeg.c b/contrib/libs/libjpeg-turbo/src/djpeg.c
new file mode 100644
index 00000000000..fe559faeb68
--- /dev/null
+++ b/contrib/libs/libjpeg-turbo/src/djpeg.c
@@ -0,0 +1,941 @@
+/*
+ * djpeg.c
+ *
+ * This file was part of the Independent JPEG Group's software:
+ * Copyright (C) 1991-1997, Thomas G. Lane.
+ * Modified 2013-2019 by Guido Vollbeding.
+ * libjpeg-turbo Modifications:
+ * Copyright (C) 2010-2011, 2013-2017, 2019-2020, 2022-2024, D. R. Commander.
+ * Copyright (C) 2015, Google, Inc.
+ * For conditions of distribution and use, see the accompanying README.ijg
+ * file.
+ *
+ * This file contains a command-line user interface for the JPEG decompressor.
+ * 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:
+ *      djpeg [options]  inputfile outputfile
+ *      djpeg [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
+ *      djpeg [options]  -outfile outputfile  inputfile
+ * works regardless of which command line style is used.
+ */
+
+#ifdef _MSC_VER
+#define _CRT_SECURE_NO_DEPRECATE
+#endif
+
+#include "cdjpeg.h"             /* Common decls for cjpeg/djpeg applications */
+#include "jversion.h"           /* for version message */
+#include "jconfigint.h"
+
+#include <ctype.h>              /* to declare isprint() */
+
+
+/* Create the add-on message string table. */
+
+#define JMESSAGE(code, string)  string,
+
+static const char * const cdjpeg_message_table[] = {
+#include "cderror.h"
+  NULL
+};
+
+
+/*
+ * This list defines the known output image formats
+ * (not all of which need be supported by a given version).
+ * You can change the default output format by defining DEFAULT_FMT;
+ * indeed, you had better do so if you undefine PPM_SUPPORTED.
+ */
+
+typedef enum {
+  FMT_BMP,                      /* BMP format (Windows flavor) */
+  FMT_GIF,                      /* GIF format (LZW-compressed) */
+  FMT_GIF0,                     /* GIF format (uncompressed) */
+  FMT_OS2,                      /* BMP format (OS/2 flavor) */
+  FMT_PPM,                      /* PPM/PGM (PBMPLUS formats) */
+  FMT_TARGA,                    /* Targa format */
+  FMT_TIFF                      /* TIFF format */
+} IMAGE_FORMATS;
+
+#ifndef DEFAULT_FMT             /* so can override from CFLAGS in Makefile */
+#define DEFAULT_FMT     FMT_PPM
+#endif
+
+static IMAGE_FORMATS requested_fmt;
+
+
+/*
+ * 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 *icc_filename;      /* for -icc switch */
+static JDIMENSION max_scans;    /* for -maxscans switch */
+static char *outfilename;       /* for -outfile switch */
+static boolean memsrc;          /* for -memsrc switch */
+static boolean report;          /* for -report switch */
+static boolean skip, crop;
+static JDIMENSION skip_start, skip_end;
+static JDIMENSION crop_x, crop_y, crop_width, crop_height;
+static boolean strict;          /* for -strict switch */
+#define INPUT_BUF_SIZE  4096
+
+
+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, "  -colors N      Reduce image to no more than N colors [legacy feature]\n");
+  fprintf(stderr, "  -fast          Low-quality processing [legacy feature]\n");
+  fprintf(stderr, "  -grayscale     Force grayscale output\n");
+  fprintf(stderr, "  -rgb           Force RGB output\n");
+  fprintf(stderr, "  -rgb565        Force RGB565 output\n");
+#ifdef IDCT_SCALING_SUPPORTED
+  fprintf(stderr, "  -scale M/N     Scale output image by fraction M/N, eg, 1/8\n");
+#endif
+#ifdef BMP_SUPPORTED
+  fprintf(stderr, "  -bmp           Select BMP output format (Windows style)%s\n",
+          (DEFAULT_FMT == FMT_BMP ? " (default)" : ""));
+#endif
+#ifdef GIF_SUPPORTED
+  fprintf(stderr, "  -gif           Select GIF output format (LZW-compressed)%s [legacy feature]\n",
+          (DEFAULT_FMT == FMT_GIF ? " (default)" : ""));
+  fprintf(stderr, "  -gif0          Select GIF output format (uncompressed)%s [legacy feature]\n",
+          (DEFAULT_FMT == FMT_GIF0 ? " (default)" : ""));
+#endif
+#ifdef BMP_SUPPORTED
+  fprintf(stderr, "  -os2           Select BMP output format (OS/2 style)%s [legacy feature]\n",
+          (DEFAULT_FMT == FMT_OS2 ? " (default)" : ""));
+#endif
+#ifdef PPM_SUPPORTED
+  fprintf(stderr, "  -pnm           Select PBMPLUS (PPM/PGM) output format%s\n",
+          (DEFAULT_FMT == FMT_PPM ? " (default)" : ""));
+#endif
+#ifdef TARGA_SUPPORTED
+  fprintf(stderr, "  -targa         Select Targa output format%s [legacy feature]\n",
+          (DEFAULT_FMT == FMT_TARGA ? " (default)" : ""));
+#endif
+  fprintf(stderr, "Switches for advanced users:\n");
+#ifdef DCT_ISLOW_SUPPORTED
+  fprintf(stderr, "  -dct int       Use accurate integer DCT method%s\n",
+          (JDCT_DEFAULT == JDCT_ISLOW ? " (default)" : ""));
+#endif
+#ifdef DCT_IFAST_SUPPORTED
+  fprintf(stderr, "  -dct fast      Use less accurate integer DCT method [legacy feature]%s\n",
+          (JDCT_DEFAULT == JDCT_IFAST ? " (default)" : ""));
+#endif
+#ifdef DCT_FLOAT_SUPPORTED
+  fprintf(stderr, "  -dct float     Use floating-point DCT method [legacy feature]%s\n",
+          (JDCT_DEFAULT == JDCT_FLOAT ? " (default)" : ""));
+#endif
+  fprintf(stderr, "  -dither fs     Use Floyd-Steinberg dithering when quantizing colors (default)\n");
+  fprintf(stderr, "                 [legacy feature]\n");
+  fprintf(stderr, "  -dither none   Don't use dithering when quantizing colors [legacy feature]\n");
+  fprintf(stderr, "  -dither ordered  Use ordered dithering when quantizing colors\n");
+  fprintf(stderr, "                   [legacy feature]\n");
+  fprintf(stderr, "  -icc FILE      Extract ICC profile to FILE\n");
+#ifdef QUANT_2PASS_SUPPORTED
+  fprintf(stderr, "  -map FILE      Quantize to colors used in named image file [legacy feature]\n");
+#endif
+  fprintf(stderr, "  -nosmooth      Use faster, lower-quality upsampling\n");
+#ifdef QUANT_1PASS_SUPPORTED
+  fprintf(stderr, "  -onepass       Use 1-pass color quantization (low quality) [legacy feature]\n");
+#endif
+  fprintf(stderr, "  -maxmemory N   Maximum memory to use (in kbytes)\n");
+  fprintf(stderr, "  -maxscans N    Maximum number of scans to allow in input file\n");
+  fprintf(stderr, "  -outfile name  Specify name for output file\n");
+  fprintf(stderr, "  -memsrc        Load input file into memory before decompressing\n");
+  fprintf(stderr, "  -report        Report decompression progress\n");
+  fprintf(stderr, "  -skip Y0,Y1    Decompress all rows except those between Y0 and Y1 (inclusive)\n");
+  fprintf(stderr, "  -crop WxH+X+Y  Decompress only a rectangular subregion of the image\n");
+  fprintf(stderr, "                 [requires PBMPLUS (PPM/PGM), GIF, or Targa output format]\n");
+  fprintf(stderr, "  -strict        Treat all warnings as fatal\n");
+  fprintf(stderr, "  -verbose  or  -debug   Emit debug output\n");
+  fprintf(stderr, "  -version       Print version information and exit\n");
+  exit(EXIT_FAILURE);
+}
+
+
+LOCAL(int)
+parse_switches(j_decompress_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;
+
+  /* Set up default JPEG parameters. */
+  requested_fmt = DEFAULT_FMT;  /* set default output file format */
+  icc_filename = NULL;
+  max_scans = 0;
+  outfilename = NULL;
+  memsrc = FALSE;
+  report = FALSE;
+  skip = FALSE;
+  crop = FALSE;
+  strict = 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, "bmp", 1)) {
+      /* BMP output format (Windows flavor). */
+      requested_fmt = FMT_BMP;
+
+    } else if (keymatch(arg, "colors", 1) || keymatch(arg, "colours", 1) ||
+               keymatch(arg, "quantize", 1) || keymatch(arg, "quantise", 1)) {
+      /* Do color quantization. */
+      int val;
+
+      if (++argn >= argc)       /* advance to next argument */
+        usage();
+      if (sscanf(argv[argn], "%d", &val) != 1)
+        usage();
+      cinfo->desired_number_of_colors = val;
+      cinfo->quantize_colors = TRUE;
+
+    } else if (keymatch(arg, "dct", 2)) {
+      /* Select IDCT 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, "dither", 2)) {
+      /* Select dithering algorithm. */
+      if (++argn >= argc)       /* advance to next argument */
+        usage();
+      if (keymatch(argv[argn], "fs", 2)) {
+        cinfo->dither_mode = JDITHER_FS;
+      } else if (keymatch(argv[argn], "none", 2)) {
+        cinfo->dither_mode = JDITHER_NONE;
+      } else if (keymatch(argv[argn], "ordered", 2)) {
+        cinfo->dither_mode = JDITHER_ORDERED;
+      } 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, "%s version %s (build %s)\n",
+                PACKAGE_NAME, VERSION, BUILD);
+        fprintf(stderr, JCOPYRIGHT1);
+        fprintf(stderr, JCOPYRIGHT2 "\n");
+        fprintf(stderr, "Emulating The Independent JPEG Group's software, version %s\n\n",
+                JVERSION);
+        printed_version = TRUE;
+      }
+      cinfo->err->trace_level++;
+
+    } else if (keymatch(arg, "version", 4)) {
+      fprintf(stderr, "%s version %s (build %s)\n",
+              PACKAGE_NAME, VERSION, BUILD);
+      exit(EXIT_SUCCESS);
+
+    } else if (keymatch(arg, "fast", 1)) {
+      /* Select recommended processing options for quick-and-dirty output. */
+      cinfo->two_pass_quantize = FALSE;
+      cinfo->dither_mode = JDITHER_ORDERED;
+      if (!cinfo->quantize_colors) /* don't override an earlier -colors */
+        cinfo->desired_number_of_colors = 216;
+      cinfo->dct_method = JDCT_FASTEST;
+      cinfo->do_fancy_upsampling = FALSE;
+
+    } else if (keymatch(arg, "gif", 1)) {
+      /* GIF output format (LZW-compressed). */
+      requested_fmt = FMT_GIF;
+
+    } else if (keymatch(arg, "gif0", 4)) {
+      /* GIF output format (uncompressed). */
+      requested_fmt = FMT_GIF0;
+
+    } else if (keymatch(arg, "grayscale", 2) ||
+               keymatch(arg, "greyscale", 2)) {
+      /* Force monochrome output. */
+      cinfo->out_color_space = JCS_GRAYSCALE;
+
+    } else if (keymatch(arg, "rgb", 2)) {
+      /* Force RGB output. */
+      cinfo->out_color_space = JCS_RGB;
+
+    } else if (keymatch(arg, "rgb565", 2)) {
+      /* Force RGB565 output. */
+      cinfo->out_color_space = JCS_RGB565;
+
+    } else if (keymatch(arg, "icc", 1)) {
+      /* Set ICC filename. */
+      if (++argn >= argc)       /* advance to next argument */
+        usage();
+      icc_filename = argv[argn];
+#ifdef SAVE_MARKERS_SUPPORTED
+      jpeg_save_markers(cinfo, JPEG_APP0 + 2, 0xFFFF);
+#endif
+
+    } else if (keymatch(arg, "map", 3)) {
+      /* Quantize to a color map taken from an input file. */
+      if (++argn >= argc)       /* advance to next argument */
+        usage();
+      if (for_real) {           /* too expensive to do twice! */
+#ifdef QUANT_2PASS_SUPPORTED    /* otherwise can't quantize to supplied map */
+        FILE *mapfile;
+
+        if ((mapfile = fopen(argv[argn], READ_BINARY)) == NULL) {
+          fprintf(stderr, "%s: can't open %s\n", progname, argv[argn]);
+          exit(EXIT_FAILURE);
+        }
+        if (cinfo->data_precision == 12)
+          read_color_map_12(cinfo, mapfile);
+        else
+          read_color_map(cinfo, mapfile);
+        fclose(mapfile);
+        cinfo->quantize_colors = TRUE;
+#else
+        ERREXIT(cinfo, JERR_NOT_COMPILED);
+#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, "maxscans", 4)) {
+      if (++argn >= argc)       /* advance to next argument */
+        usage();
+      if (sscanf(argv[argn], "%u", &max_scans) != 1)
+        usage();
+
+    } else if (keymatch(arg, "nosmooth", 3)) {
+      /* Suppress fancy upsampling */
+      cinfo->do_fancy_upsampling = FALSE;
+
+    } else if (keymatch(arg, "onepass", 3)) {
+      /* Use fast one-pass quantization. */
+      cinfo->two_pass_quantize = FALSE;
+
+    } else if (keymatch(arg, "os2", 3)) {
+      /* BMP output format (OS/2 flavor). */
+      requested_fmt = FMT_OS2;
+
+    } 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, "memsrc", 2)) {
+      /* Use in-memory source manager */
+      memsrc = TRUE;
+
+    } else if (keymatch(arg, "pnm", 1) || keymatch(arg, "ppm", 1)) {
+      /* PPM/PGM output format. */
+      requested_fmt = FMT_PPM;
+
+    } else if (keymatch(arg, "report", 2)) {
+      report = TRUE;
+
+    } else if (keymatch(arg, "scale", 1)) {
+      /* Scale the output image by a fraction M/N. */
+      if (++argn >= argc)       /* advance to next argument */
+        usage();
+      if (sscanf(argv[argn], "%u/%u",
+                 &cinfo->scale_num, &cinfo->scale_denom) != 2)
+        usage();
+
+    } else if (keymatch(arg, "skip", 2)) {
+      int temp_start = -1, temp_end = -1;
+      if (++argn >= argc)
+        usage();
+      if (sscanf(argv[argn], "%d,%d", &temp_start, &temp_end) != 2 ||
+          temp_start < 0 || temp_end < 0 || temp_start > temp_end)
+        usage();
+      skip = TRUE;
+      skip_start = temp_start;
+      skip_end = temp_end;
+
+    } else if (keymatch(arg, "crop", 2)) {
+      int temp_width = -1, temp_height = -1, temp_x = -1, temp_y = -1;
+      char c;
+      if (++argn >= argc)
+        usage();
+      if (sscanf(argv[argn], "%d%c%d+%d+%d", &temp_width, &c, &temp_height,
+                 &temp_x, &temp_y) != 5 ||
+          (c != 'X' && c != 'x') || temp_width < 1 || temp_height < 1 ||
+          temp_x < 0 || temp_y < 0)
+        usage();
+      crop = TRUE;
+      crop_width = temp_width;
+      crop_height = temp_height;
+      crop_x = temp_x;
+      crop_y = temp_y;
+
+    } else if (keymatch(arg, "strict", 2)) {
+      strict = TRUE;
+
+    } else if (keymatch(arg, "targa", 1)) {
+      /* Targa output format. */
+      requested_fmt = FMT_TARGA;
+
+    } else {
+      usage();                  /* bogus switch */
+    }
+  }
+
+  return argn;                  /* return index of next arg (file name) */
+}
+
+
+/*
+ * Marker processor for COM and interesting APPn markers.
+ * This replaces the library's built-in processor, which just skips the marker.
+ * We want to print out the marker as text, to the extent possible.
+ * Note this code relies on a non-suspending data source.
+ */
+
+LOCAL(unsigned int)
+jpeg_getc(j_decompress_ptr cinfo)
+/* Read next byte */
+{
+  struct jpeg_source_mgr *datasrc = cinfo->src;
+
+  if (datasrc->bytes_in_buffer == 0) {
+    if (!(*datasrc->fill_input_buffer) (cinfo))
+      ERREXIT(cinfo, JERR_CANT_SUSPEND);
+  }
+  datasrc->bytes_in_buffer--;
+  return *datasrc->next_input_byte++;
+}
+
+
+METHODDEF(boolean)
+print_text_marker(j_decompress_ptr cinfo)
+{
+  boolean traceit = (cinfo->err->trace_level >= 1);
+  long length;
+  unsigned int ch;
+  unsigned int lastch = 0;
+
+  length = jpeg_getc(cinfo) << 8;
+  length += jpeg_getc(cinfo);
+  length -= 2;                  /* discount the length word itself */
+
+  if (traceit) {
+    if (cinfo->unread_marker == JPEG_COM)
+      fprintf(stderr, "Comment, length %ld:\n", (long)length);
+    else                        /* assume it is an APPn otherwise */
+      fprintf(stderr, "APP%d, length %ld:\n",
+              cinfo->unread_marker - JPEG_APP0, (long)length);
+  }
+
+  while (--length >= 0) {
+    ch = jpeg_getc(cinfo);
+    if (traceit) {
+      /* Emit the character in a readable form.
+       * Nonprintables are converted to \nnn form,
+       * while \ is converted to \\.
+       * Newlines in CR, CR/LF, or LF form will be printed as one newline.
+       */
+      if (ch == '\r') {
+        fprintf(stderr, "\n");
+      } else if (ch == '\n') {
+        if (lastch != '\r')
+          fprintf(stderr, "\n");
+      } else if (ch == '\\') {
+        fprintf(stderr, "\\\\");
+      } else if (isprint(ch)) {
+        putc(ch, stderr);
+      } else {
+        fprintf(stderr, "\\%03o", ch);
+      }
+      lastch = ch;
+    }
+  }
+
+  if (traceit)
+    fprintf(stderr, "\n");
+
+  return TRUE;
+}
+
+
+METHODDEF(void)
+my_emit_message(j_common_ptr cinfo, int msg_level)
+{
+  if (msg_level < 0) {
+    /* Treat warning as fatal */
+    cinfo->err->error_exit(cinfo);
+  } else {
+    if (cinfo->err->trace_level >= msg_level)
+      cinfo->err->output_message(cinfo);
+  }
+}
+
+
+/*
+ * The main program.
+ */
+
+int
+main(int argc, char **argv)
+{
+  struct jpeg_decompress_struct cinfo;
+  struct jpeg_error_mgr jerr;
+  struct cdjpeg_progress_mgr progress;
+  int file_index;
+  djpeg_dest_ptr dest_mgr = NULL;
+  FILE *input_file;
+  FILE *output_file;
+  unsigned char *inbuffer = NULL;
+  unsigned long insize = 0;
+  JDIMENSION num_scanlines;
+
+  progname = argv[0];
+  if (progname == NULL || progname[0] == 0)
+    progname = "djpeg";         /* in case C library doesn't provide it */
+
+  /* Initialize the JPEG decompression object with default error handling. */
+  cinfo.err = jpeg_std_error(&jerr);
+  jpeg_create_decompress(&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;
+
+  /* Insert custom marker processor for COM and APP12.
+   * APP12 is used by some digital camera makers for textual info,
+   * so we provide the ability to display it as text.
+   * If you like, additional APPn marker types can be selected for display,
+   * but don't try to override APP0 or APP14 this way (see libjpeg.txt).
+   */
+  jpeg_set_marker_processor(&cinfo, JPEG_COM, print_text_marker);
+  jpeg_set_marker_processor(&cinfo, JPEG_APP0 + 12, print_text_marker);
+
+  /* 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.
+   * (Exception: tracing level set here controls verbosity for COM markers
+   * found during jpeg_read_header...)
+   */
+
+  file_index = parse_switches(&cinfo, argc, argv, 0, FALSE);
+
+  if (strict)
+    jerr.emit_message = my_emit_message;
+
+#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();
+  }
+
+  if (report || max_scans != 0) {
+    start_progress_monitor((j_common_ptr)&cinfo, &progress);
+    progress.report = report;
+    progress.max_scans = max_scans;
+  }
+
+  /* Specify data source for decompression */
+  if (memsrc) {
+    size_t nbytes;
+    do {
+      inbuffer = (unsigned char *)realloc(inbuffer, insize + INPUT_BUF_SIZE);
+      if (inbuffer == NULL) {
+        fprintf(stderr, "%s: memory allocation failure\n", progname);
+        exit(EXIT_FAILURE);
+      }
+      nbytes = fread(&inbuffer[insize], 1, INPUT_BUF_SIZE, input_file);
+      if (nbytes < INPUT_BUF_SIZE && ferror(input_file)) {
+        if (file_index < argc)
+          fprintf(stderr, "%s: can't read from %s\n", progname,
+                  argv[file_index]);
+        else
+          fprintf(stderr, "%s: can't read from stdin\n", progname);
+      }
+      insize += (unsigned long)nbytes;
+    } while (nbytes == INPUT_BUF_SIZE);
+    fprintf(stderr, "Compressed size:  %lu bytes\n", insize);
+    jpeg_mem_src(&cinfo, inbuffer, insize);
+  } else
+    jpeg_stdio_src(&cinfo, input_file);
+
+  /* Read file header, set default decompression parameters */
+  (void)jpeg_read_header(&cinfo, TRUE);
+
+  /* Adjust default decompression parameters by re-parsing the options */
+  file_index = parse_switches(&cinfo, argc, argv, 0, TRUE);
+
+  /* Initialize the output module now to let it override any crucial
+   * option settings (for instance, GIF wants to force color quantization).
+   */
+  switch (requested_fmt) {
+#ifdef BMP_SUPPORTED
+  case FMT_BMP:
+    dest_mgr = jinit_write_bmp(&cinfo, FALSE, TRUE);
+    break;
+  case FMT_OS2:
+    dest_mgr = jinit_write_bmp(&cinfo, TRUE, TRUE);
+    break;
+#endif
+#ifdef GIF_SUPPORTED
+  case FMT_GIF:
+    if (cinfo.data_precision == 8)
+      dest_mgr = jinit_write_gif(&cinfo, TRUE);
+    else if (cinfo.data_precision == 12)
+      dest_mgr = j12init_write_gif(&cinfo, TRUE);
+    else
+      ERREXIT1(&cinfo, JERR_BAD_PRECISION, cinfo.data_precision);
+    break;
+  case FMT_GIF0:
+    dest_mgr = jinit_write_gif(&cinfo, FALSE);
+    break;
+#endif
+#ifdef PPM_SUPPORTED
+  case FMT_PPM:
+    if (cinfo.data_precision <= 8)
+      dest_mgr = jinit_write_ppm(&cinfo);
+    else if (cinfo.data_precision <= 12)
+      dest_mgr = j12init_write_ppm(&cinfo);
+    else
+#ifdef D_LOSSLESS_SUPPORTED
+      dest_mgr = j16init_write_ppm(&cinfo);
+#else
+      ERREXIT1(&cinfo, JERR_BAD_PRECISION, cinfo.data_precision);
+#endif
+    break;
+#endif
+#ifdef TARGA_SUPPORTED
+  case FMT_TARGA:
+    dest_mgr = jinit_write_targa(&cinfo);
+    break;
+#endif
+  default:
+    ERREXIT(&cinfo, JERR_UNSUPPORTED_FORMAT);
+    break;
+  }
+  dest_mgr->output_file = output_file;
+
+  /* Start decompressor */
+  (void)jpeg_start_decompress(&cinfo);
+
+  /* Skip rows */
+  if (skip) {
+    JDIMENSION tmp;
+
+    /* Check for valid skip_end.  We cannot check this value until after
+     * jpeg_start_decompress() is called.  Note that we have already verified
+     * that skip_start <= skip_end.
+     */
+    if (skip_end > cinfo.output_height - 1) {
+      fprintf(stderr, "%s: skip region exceeds image height %u\n", progname,
+              cinfo.output_height);
+      exit(EXIT_FAILURE);
+    }
+
+    /* Write output file header.  This is a hack to ensure that the destination
+     * manager creates an output image of the proper size.
+     */
+    tmp = cinfo.output_height;
+    cinfo.output_height -= (skip_end - skip_start + 1);
+    (*dest_mgr->start_output) (&cinfo, dest_mgr);
+    cinfo.output_height = tmp;
+
+    if (cinfo.data_precision == 8) {
+      /* Process data */
+      while (cinfo.output_scanline < skip_start) {
+        num_scanlines = jpeg_read_scanlines(&cinfo, dest_mgr->buffer,
+                                            dest_mgr->buffer_height);
+        (*dest_mgr->put_pixel_rows) (&cinfo, dest_mgr, num_scanlines);
+      }
+      if ((tmp = jpeg_skip_scanlines(&cinfo, skip_end - skip_start + 1)) !=
+          skip_end - skip_start + 1) {
+        fprintf(stderr, "%s: jpeg_skip_scanlines() returned %u rather than %u\n",
+                progname, tmp, skip_end - skip_start + 1);
+        exit(EXIT_FAILURE);
+      }
+      while (cinfo.output_scanline < cinfo.output_height) {
+        num_scanlines = jpeg_read_scanlines(&cinfo, dest_mgr->buffer,
+                                            dest_mgr->buffer_height);
+        (*dest_mgr->put_pixel_rows) (&cinfo, dest_mgr, num_scanlines);
+      }
+    } else if (cinfo.data_precision == 12) {
+      /* Process data */
+      while (cinfo.output_scanline < skip_start) {
+        num_scanlines = jpeg12_read_scanlines(&cinfo, dest_mgr->buffer12,
+                                              dest_mgr->buffer_height);
+        (*dest_mgr->put_pixel_rows) (&cinfo, dest_mgr, num_scanlines);
+      }
+      if ((tmp = jpeg12_skip_scanlines(&cinfo, skip_end - skip_start + 1)) !=
+          skip_end - skip_start + 1) {
+        fprintf(stderr, "%s: jpeg12_skip_scanlines() returned %u rather than %u\n",
+                progname, tmp, skip_end - skip_start + 1);
+        exit(EXIT_FAILURE);
+      }
+      while (cinfo.output_scanline < cinfo.output_height) {
+        num_scanlines = jpeg12_read_scanlines(&cinfo, dest_mgr->buffer12,
+                                              dest_mgr->buffer_height);
+        (*dest_mgr->put_pixel_rows) (&cinfo, dest_mgr, num_scanlines);
+      }
+    } else
+      ERREXIT(&cinfo, JERR_NOTIMPL);
+
+  /* Decompress a subregion */
+  } else if (crop) {
+    JDIMENSION tmp;
+
+    /* Check for valid crop dimensions.  We cannot check these values until
+     * after jpeg_start_decompress() is called.
+     */
+    if ((unsigned long long)crop_x + crop_width > cinfo.output_width ||
+        (unsigned long long)crop_y + crop_height > cinfo.output_height) {
+      fprintf(stderr, "%s: crop dimensions exceed image dimensions %u x %u\n",
+              progname, cinfo.output_width, cinfo.output_height);
+      exit(EXIT_FAILURE);
+    }
+
+    if (cinfo.data_precision == 8)
+      jpeg_crop_scanline(&cinfo, &crop_x, &crop_width);
+    else if (cinfo.data_precision == 12)
+      jpeg12_crop_scanline(&cinfo, &crop_x, &crop_width);
+    else
+      ERREXIT(&cinfo, JERR_NOTIMPL);
+    if (dest_mgr->calc_buffer_dimensions)
+      (*dest_mgr->calc_buffer_dimensions) (&cinfo, dest_mgr);
+    else
+      ERREXIT(&cinfo, JERR_UNSUPPORTED_FORMAT);
+
+    /* Write output file header.  This is a hack to ensure that the destination
+     * manager creates an output image of the proper size.
+     */
+    tmp = cinfo.output_height;
+    cinfo.output_height = crop_height;
+    (*dest_mgr->start_output) (&cinfo, dest_mgr);
+    cinfo.output_height = tmp;
+
+    if (cinfo.data_precision == 8) {
+      /* Process data */
+      if ((tmp = jpeg_skip_scanlines(&cinfo, crop_y)) != crop_y) {
+        fprintf(stderr, "%s: jpeg_skip_scanlines() returned %u rather than %u\n",
+                progname, tmp, crop_y);
+        exit(EXIT_FAILURE);
+      }
+      while (cinfo.output_scanline < crop_y + crop_height) {
+        num_scanlines = jpeg_read_scanlines(&cinfo, dest_mgr->buffer,
+                                            dest_mgr->buffer_height);
+        (*dest_mgr->put_pixel_rows) (&cinfo, dest_mgr, num_scanlines);
+      }
+      if ((tmp =
+           jpeg_skip_scanlines(&cinfo,
+                               cinfo.output_height - crop_y - crop_height)) !=
+          cinfo.output_height - crop_y - crop_height) {
+        fprintf(stderr, "%s: jpeg_skip_scanlines() returned %u rather than %u\n",
+                progname, tmp, cinfo.output_height - crop_y - crop_height);
+        exit(EXIT_FAILURE);
+      }
+    } else if (cinfo.data_precision == 12) {
+      /* Process data */
+      if ((tmp = jpeg12_skip_scanlines(&cinfo, crop_y)) != crop_y) {
+        fprintf(stderr, "%s: jpeg12_skip_scanlines() returned %u rather than %u\n",
+                progname, tmp, crop_y);
+        exit(EXIT_FAILURE);
+      }
+      while (cinfo.output_scanline < crop_y + crop_height) {
+        num_scanlines = jpeg12_read_scanlines(&cinfo, dest_mgr->buffer12,
+                                              dest_mgr->buffer_height);
+        (*dest_mgr->put_pixel_rows) (&cinfo, dest_mgr, num_scanlines);
+      }
+      if ((tmp =
+           jpeg12_skip_scanlines(&cinfo, cinfo.output_height - crop_y -
+                                         crop_height)) !=
+          cinfo.output_height - crop_y - crop_height) {
+        fprintf(stderr, "%s: jpeg12_skip_scanlines() returned %u rather than %u\n",
+                progname, tmp, cinfo.output_height - crop_y - crop_height);
+        exit(EXIT_FAILURE);
+      }
+    } else
+      ERREXIT(&cinfo, JERR_NOTIMPL);
+
+  /* Normal full-image decompress */
+  } else {
+    /* Write output file header */
+    (*dest_mgr->start_output) (&cinfo, dest_mgr);
+
+    if (cinfo.data_precision <= 8) {
+      /* Process data */
+      while (cinfo.output_scanline < cinfo.output_height) {
+        num_scanlines = jpeg_read_scanlines(&cinfo, dest_mgr->buffer,
+                                            dest_mgr->buffer_height);
+        (*dest_mgr->put_pixel_rows) (&cinfo, dest_mgr, num_scanlines);
+      }
+    } else if (cinfo.data_precision <= 12) {
+      /* Process data */
+      while (cinfo.output_scanline < cinfo.output_height) {
+        num_scanlines = jpeg12_read_scanlines(&cinfo, dest_mgr->buffer12,
+                                              dest_mgr->buffer_height);
+        (*dest_mgr->put_pixel_rows) (&cinfo, dest_mgr, num_scanlines);
+      }
+    } else {
+#ifdef D_LOSSLESS_SUPPORTED
+      /* Process data */
+      while (cinfo.output_scanline < cinfo.output_height) {
+        num_scanlines = jpeg16_read_scanlines(&cinfo, dest_mgr->buffer16,
+                                              dest_mgr->buffer_height);
+        (*dest_mgr->put_pixel_rows) (&cinfo, dest_mgr, num_scanlines);
+      }
+#else
+      ERREXIT1(&cinfo, JERR_BAD_PRECISION, cinfo.data_precision);
+#endif
+    }
+  }
+
+  /* Hack: count final pass as done in case finish_output does an extra pass.
+   * The library won't have updated completed_passes.
+   */
+  if (report || max_scans != 0)
+    progress.pub.completed_passes = progress.pub.total_passes;
+
+  if (icc_filename != NULL) {
+    FILE *icc_file;
+    JOCTET *icc_profile;
+    unsigned int icc_len;
+
+    if ((icc_file = fopen(icc_filename, WRITE_BINARY)) == NULL) {
+      fprintf(stderr, "%s: can't open %s\n", progname, icc_filename);
+      exit(EXIT_FAILURE);
+    }
+    if (jpeg_read_icc_profile(&cinfo, &icc_profile, &icc_len)) {
+      if (fwrite(icc_profile, icc_len, 1, icc_file) < 1) {
+        fprintf(stderr, "%s: can't read ICC profile from %s\n", progname,
+                icc_filename);
+        free(icc_profile);
+        fclose(icc_file);
+        exit(EXIT_FAILURE);
+      }
+      free(icc_profile);
+      fclose(icc_file);
+    } else if (cinfo.err->msg_code != JWRN_BOGUS_ICC)
+      fprintf(stderr, "%s: no ICC profile data in JPEG file\n", progname);
+  }
+
+  /* Finish decompression and release memory.
+   * I must do it in this order because output module has allocated memory
+   * of lifespan JPOOL_IMAGE; it needs to finish before releasing memory.
+   */
+  (*dest_mgr->finish_output) (&cinfo, dest_mgr);
+  (void)jpeg_finish_decompress(&cinfo);
+  jpeg_destroy_decompress(&cinfo);
+
+  /* Close files, if we opened them */
+  if (input_file != stdin)
+    fclose(input_file);
+  if (output_file != stdout)
+    fclose(output_file);
+
+  if (report || max_scans != 0)
+    end_progress_monitor((j_common_ptr)&cinfo);
+
+  if (memsrc)
+    free(inbuffer);
+
+  /* All done. */
+  exit(jerr.num_warnings ? EXIT_WARNING : EXIT_SUCCESS);
+  return 0;                     /* suppress no-return-value warnings */
+}