diff options
Diffstat (limited to 'jpeg/djpeg.c')
| -rwxr-xr-x | jpeg/djpeg.c | 617 |
1 files changed, 0 insertions, 617 deletions
diff --git a/jpeg/djpeg.c b/jpeg/djpeg.c deleted file mode 100755 index bc544dc..0000000 --- a/jpeg/djpeg.c +++ /dev/null @@ -1,617 +0,0 @@ -/* - * djpeg.c - * - * Copyright (C) 1991-1997, Thomas G. Lane. - * Modified 2009 by 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 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. - */ - -#include "cdjpeg.h" /* Common decls for cjpeg/djpeg applications */ -#include "jversion.h" /* for version message */ - -#include <ctype.h> /* to declare isprint() */ - -#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 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 */ - FMT_OS2, /* BMP format (OS/2 flavor) */ - FMT_PPM, /* PPM/PGM (PBMPLUS formats) */ - FMT_RLE, /* RLE format */ - 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 * 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, " -colors N Reduce image to no more than N colors\n"); - fprintf(stderr, " -fast Fast, low-quality processing\n"); - fprintf(stderr, " -grayscale Force grayscale 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%s\n", - (DEFAULT_FMT == FMT_GIF ? " (default)" : "")); -#endif -#ifdef BMP_SUPPORTED - fprintf(stderr, " -os2 Select BMP output format (OS/2 style)%s\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 RLE_SUPPORTED - fprintf(stderr, " -rle Select Utah RLE output format%s\n", - (DEFAULT_FMT == FMT_RLE ? " (default)" : "")); -#endif -#ifdef TARGA_SUPPORTED - fprintf(stderr, " -targa Select Targa output format%s\n", - (DEFAULT_FMT == FMT_TARGA ? " (default)" : "")); -#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, " -dither fs Use F-S dithering (default)\n"); - fprintf(stderr, " -dither none Don't use dithering in quantization\n"); - fprintf(stderr, " -dither ordered Use ordered dither (medium speed, quality)\n"); -#ifdef QUANT_2PASS_SUPPORTED - fprintf(stderr, " -map FILE Map to colors used in named image file\n"); -#endif - fprintf(stderr, " -nosmooth Don't use high-quality upsampling\n"); -#ifdef QUANT_1PASS_SUPPORTED - fprintf(stderr, " -onepass Use 1-pass quantization (fast, low quality)\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"); - 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 */ - 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, "bmp", 1)) { - /* BMP output format. */ - 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, "Independent JPEG Group's DJPEG, version %s\n%s\n", - JVERSION, JCOPYRIGHT); - printed_version = TRUE; - } - cinfo->err->trace_level++; - - } 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. */ - requested_fmt = FMT_GIF; - - } else if (keymatch(arg, "grayscale", 2) || keymatch(arg, "greyscale",2)) { - /* Force monochrome output. */ - cinfo->out_color_space = JCS_GRAYSCALE; - - } 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); - } - 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, "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, "pnm", 1) || keymatch(arg, "ppm", 1)) { - /* PPM/PGM output format. */ - requested_fmt = FMT_PPM; - - } else if (keymatch(arg, "rle", 1)) { - /* RLE output format. */ - requested_fmt = FMT_RLE; - - } 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], "%d/%d", - &cinfo->scale_num, &cinfo->scale_denom) < 1) - usage(); - - } 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 GETJOCTET(*datasrc->next_input_byte++); -} - - -METHODDEF(boolean) -print_text_marker (j_decompress_ptr cinfo) -{ - boolean traceit = (cinfo->err->trace_level >= 1); - INT32 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; -} - - -/* - * The main program. - */ - -int -main (int argc, char **argv) -{ - struct jpeg_decompress_struct cinfo; - struct jpeg_error_mgr jerr; -#ifdef PROGRESS_REPORT - struct cdjpeg_progress_mgr progress; -#endif - int file_index; - djpeg_dest_ptr dest_mgr = NULL; - 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 = "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.doc). - */ - jpeg_set_marker_processor(&cinfo, JPEG_COM, print_text_marker); - jpeg_set_marker_processor(&cinfo, JPEG_APP0+12, print_text_marker); - - /* Now safe to enable signal catcher. */ -#ifdef NEED_SIGNAL_CATCHER - enable_signal_catcher((j_common_ptr) &cinfo); -#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 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); - -#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 - - /* Specify data source for decompression */ - 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); - break; - case FMT_OS2: - dest_mgr = jinit_write_bmp(&cinfo, TRUE); - break; -#endif -#ifdef GIF_SUPPORTED - case FMT_GIF: - dest_mgr = jinit_write_gif(&cinfo); - break; -#endif -#ifdef PPM_SUPPORTED - case FMT_PPM: - dest_mgr = jinit_write_ppm(&cinfo); - break; -#endif -#ifdef RLE_SUPPORTED - case FMT_RLE: - dest_mgr = jinit_write_rle(&cinfo); - 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); - - /* Write output file header */ - (*dest_mgr->start_output) (&cinfo, dest_mgr); - - /* 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); - } - -#ifdef PROGRESS_REPORT - /* Hack: count final pass as done in case finish_output does an extra pass. - * The library won't have updated completed_passes. - */ - progress.pub.completed_passes = progress.pub.total_passes; -#endif - - /* 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); - -#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 */ -} |