| /* |
| * alternate djpeg.c |
| * |
| * Copyright (C) 1991-1997, 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. |
| * |
| * --------------------------------------------------------------------- |
| * x86 SIMD extension for IJG JPEG library |
| * Copyright (C) 1999-2006, MIYASAKA Masaru. |
| * This file has been modified for SIMD extension. |
| * Last Modified : January 6, 2006 |
| * --------------------------------------------------------------------- |
| * |
| * This file contains an alternate user interface for the JPEG decompressor. |
| * One or more input files are named on the command line, and output file |
| * names are created by substituting an appropriate extension. |
| */ |
| |
| #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 |
| |
| #ifndef PATH_MAX /* ANSI maximum-pathname-length constant */ |
| #define PATH_MAX 256 |
| #endif |
| |
| |
| /* Create the add-on message string table. */ |
| |
| #define JMESSAGE(code,string) string , |
| |
| static const char * const cdjpeg_message_table[] = { |
| #include "cderror.h" |
| NULL |
| }; |
| |
| |
| /* |
| * SIMD Ext: compiler-specific hacks to enable filename wild-card expansion |
| */ |
| |
| #ifdef _MSC_VER /* Microsoft Visual C++ */ |
| /* from setargv.c (setargv.obj) */ |
| /* Tested under Visual C++ V6.0, Toolkit 2003, and 2005 Express Edition */ |
| int __cdecl _setargv(void) { int __cdecl __setargv(void); return __setargv(); } |
| #endif |
| #ifdef __BORLANDC__ /* Borland C++ */ |
| /* from wildargs.c (wildargs.obj) */ |
| /* Tested under Borland C++ Compiler 5.5 (win32) */ |
| #include <wildargs.h> |
| typedef void _RTLENTRY (* _RTLENTRY _argv_expand_fnc)(char *, _PFN_ADDARG); |
| _argv_expand_fnc _argv_expand_ptr = _expand_wild; |
| #endif |
| |
| |
| /* |
| * Automatic determination of available memory. |
| */ |
| |
| static long default_maxmem; /* saves value determined at startup, or 0 */ |
| |
| #ifndef FREE_MEM_ESTIMATE /* may be defined from command line */ |
| |
| #ifdef MSDOS /* For MS-DOS (unless flat-memory model) */ |
| |
| #include <dos.h> /* for access to intdos() call */ |
| |
| LOCAL(long) |
| unused_dos_memory (void) |
| /* Obtain total amount of unallocated DOS memory */ |
| { |
| union REGS regs; |
| long nparas; |
| |
| regs.h.ah = 0x48; /* DOS function Allocate Memory Block */ |
| regs.x.bx = 0xFFFF; /* Ask for more memory than DOS can have */ |
| (void) intdos(®s, ®s); |
| /* DOS will fail and return # of paragraphs actually available in BX. */ |
| nparas = (unsigned int) regs.x.bx; |
| /* Times 16 to convert to bytes. */ |
| return nparas << 4; |
| } |
| |
| /* The default memory setting is 95% of the available space. */ |
| #define FREE_MEM_ESTIMATE ((unused_dos_memory() * 95L) / 100L) |
| |
| #endif /* MSDOS */ |
| |
| #ifdef ATARI /* For Atari ST/STE/TT, Pure C or Turbo C */ |
| |
| #include <ext.h> |
| |
| /* The default memory setting is 90% of the available space. */ |
| #define FREE_MEM_ESTIMATE (((long) coreleft() * 90L) / 100L) |
| |
| #endif /* ATARI */ |
| |
| /* Add memory-estimation procedures for other operating systems here, |
| * with appropriate #ifdef's around them. |
| */ |
| |
| #endif /* !FREE_MEM_ESTIMATE */ |
| |
| |
| /* |
| * 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_GIF |
| #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. |
| */ |
| |
| |
| 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] inputfile(s)\n", progname); |
| fprintf(stderr, "List of input files may use wildcards (* and ?)\n"); |
| fprintf(stderr, "Output filename is same as input filename except for extension\n"); |
| |
| 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 |
| #ifndef FREE_MEM_ESTIMATE |
| fprintf(stderr, " -maxmemory N Maximum memory to use (in kbytes)\n"); |
| #endif |
| fprintf(stderr, " -outfile name Specify name for output file\n"); |
| fprintf(stderr, " -verbose or -debug Emit debug output\n"); |
| exit(EXIT_FAILURE); |
| } |
| |
| |
| #ifndef JSIMD_MODEINFO_NOT_SUPPORTED |
| |
| LOCAL(void) |
| print_simd_info (FILE * file, char * labelstr, unsigned int simd) |
| { |
| fprintf(file, "%s%s%s%s%s%s\n", labelstr, |
| simd & JSIMD_MMX ? " MMX" : "", |
| simd & JSIMD_3DNOW ? " 3DNow!" : "", |
| simd & JSIMD_SSE ? " SSE" : "", |
| simd & JSIMD_SSE2 ? " SSE2" : "", |
| simd == JSIMD_NONE ? " NONE" : ""); |
| } |
| |
| #endif /* !JSIMD_MODEINFO_NOT_SUPPORTED */ |
| |
| |
| 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; |
| if (default_maxmem > 0) /* override library's default value */ |
| cinfo->mem->max_memory_to_use = default_maxmem; |
| |
| /* 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; |
| |
| #ifndef JSIMD_MASKFUNC_NOT_SUPPORTED |
| } else if (keymatch(arg, "nosimd" , 4)) { |
| jpeg_simd_mask((j_common_ptr) cinfo, JSIMD_NONE, JSIMD_ALL); |
| } else if (keymatch(arg, "nommx" , 3)) { |
| jpeg_simd_mask((j_common_ptr) cinfo, JSIMD_NONE, JSIMD_MMX); |
| } else if (keymatch(arg, "no3dnow", 3)) { |
| jpeg_simd_mask((j_common_ptr) cinfo, JSIMD_NONE, JSIMD_3DNOW); |
| } else if (keymatch(arg, "nosse" , 4)) { |
| jpeg_simd_mask((j_common_ptr) cinfo, JSIMD_NONE, JSIMD_SSE); |
| } else if (keymatch(arg, "nosse2" , 6)) { |
| jpeg_simd_mask((j_common_ptr) cinfo, JSIMD_NONE, JSIMD_SSE2); |
| #endif /* !JSIMD_MASKFUNC_NOT_SUPPORTED */ |
| |
| } 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); |
| fprintf(stderr, |
| "\nx86 SIMD extension for IJG JPEG library, version %s\n\n", |
| JPEG_SIMDEXT_VER_STR); |
| #ifndef JSIMD_MODEINFO_NOT_SUPPORTED |
| print_simd_info(stderr, "SIMD instructions supported by the system :", |
| jpeg_simd_support(NULL)); |
| |
| fprintf(stderr, "\n === SIMD Operation Modes ===\n"); |
| #ifdef DCT_ISLOW_SUPPORTED |
| print_simd_info(stderr, "Accurate integer DCT (-dct int) :", |
| jpeg_simd_inverse_dct(cinfo, JDCT_ISLOW)); |
| #endif |
| #ifdef DCT_IFAST_SUPPORTED |
| print_simd_info(stderr, "Fast integer DCT (-dct fast) :", |
| jpeg_simd_inverse_dct(cinfo, JDCT_IFAST)); |
| #endif |
| #ifdef DCT_FLOAT_SUPPORTED |
| print_simd_info(stderr, "Floating-point DCT (-dct float) :", |
| jpeg_simd_inverse_dct(cinfo, JDCT_FLOAT)); |
| #endif |
| #ifdef IDCT_SCALING_SUPPORTED |
| print_simd_info(stderr, "Reduced-size DCT (-scale M/N) :", |
| jpeg_simd_inverse_dct(cinfo, JDCT_FLOAT+1)); |
| #endif |
| print_simd_info(stderr, "High-quality upsampling (default) :", |
| jpeg_simd_upsampler(cinfo, TRUE)); |
| print_simd_info(stderr, "Low-quality upsampling (-nosmooth) :", |
| jpeg_simd_upsampler(cinfo, FALSE)); |
| print_simd_info(stderr, "Colorspace conversion (YCbCr->RGB) :", |
| jpeg_simd_color_deconverter(cinfo)); |
| fprintf(stderr, "\n"); |
| #endif /* !JSIMD_MODEINFO_NOT_SUPPORTED */ |
| 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) != 2) |
| 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; |
| } |
| |
| |
| /* |
| * Check for overwrite of an existing file; clear it with user |
| */ |
| |
| #ifndef NO_OVERWRITE_CHECK |
| |
| LOCAL(boolean) |
| is_write_ok (char * outfname) |
| { |
| FILE * ofile; |
| int ch; |
| |
| ofile = fopen(outfname, READ_BINARY); |
| if (ofile == NULL) |
| return TRUE; /* not present */ |
| fclose(ofile); /* oops, it is present */ |
| |
| for (;;) { |
| fprintf(stderr, "%s already exists, overwrite it? [y/n] ", |
| outfname); |
| fflush(stderr); |
| ch = getc(stdin); |
| if (ch != '\n') /* flush rest of line */ |
| while (getc(stdin) != '\n') |
| /* nothing */; |
| |
| switch (ch) { |
| case 'Y': |
| case 'y': |
| return TRUE; |
| case 'N': |
| case 'n': |
| return FALSE; |
| /* otherwise, ask again */ |
| } |
| } |
| } |
| |
| #endif |
| |
| |
| /* |
| * Process a single input file name, and return its index in argv[]. |
| * File names at or to left of old_file_index have been processed already. |
| */ |
| |
| LOCAL(int) |
| process_one_file (int argc, char **argv, int old_file_index) |
| { |
| struct jpeg_decompress_struct cinfo; |
| struct jpeg_error_mgr jerr; |
| char *infilename; |
| char workfilename[PATH_MAX]; |
| const char *default_extension = NULL; |
| #ifdef PROGRESS_REPORT |
| struct cdjpeg_progress_mgr progress; |
| #endif |
| int file_index; |
| djpeg_dest_ptr dest_mgr = NULL; |
| FILE * input_file = NULL; |
| FILE * output_file = NULL; |
| JDIMENSION num_scanlines; |
| |
| /* 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 next file name. |
| * 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, old_file_index, FALSE); |
| if (file_index >= argc) { |
| fprintf(stderr, "%s: missing input file name\n", progname); |
| usage(); |
| } |
| |
| /* Open the input file. */ |
| infilename = argv[file_index]; |
| if ((input_file = fopen(infilename, READ_BINARY)) == NULL) { |
| fprintf(stderr, "%s: can't open %s\n", progname, infilename); |
| goto fail; |
| } |
| |
| #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, old_file_index, 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); |
| default_extension = ".bmp"; |
| break; |
| case FMT_OS2: |
| dest_mgr = jinit_write_bmp(&cinfo, TRUE); |
| default_extension = ".bmp"; |
| break; |
| #endif |
| #ifdef GIF_SUPPORTED |
| case FMT_GIF: |
| dest_mgr = jinit_write_gif(&cinfo); |
| default_extension = ".gif"; |
| break; |
| #endif |
| #ifdef PPM_SUPPORTED |
| case FMT_PPM: |
| dest_mgr = jinit_write_ppm(&cinfo); |
| default_extension = ".ppm"; |
| break; |
| #endif |
| #ifdef RLE_SUPPORTED |
| case FMT_RLE: |
| dest_mgr = jinit_write_rle(&cinfo); |
| default_extension = ".rle"; |
| break; |
| #endif |
| #ifdef TARGA_SUPPORTED |
| case FMT_TARGA: |
| dest_mgr = jinit_write_targa(&cinfo); |
| default_extension = ".tga"; |
| break; |
| #endif |
| default: |
| ERREXIT(&cinfo, JERR_UNSUPPORTED_FORMAT); |
| break; |
| } |
| |
| /* If user didn't supply -outfile switch, select output file name. */ |
| if (outfilename == NULL) { |
| int i; |
| |
| outfilename = workfilename; |
| /* Make outfilename be infilename with appropriate extension */ |
| strcpy(outfilename, infilename); |
| for (i = strlen(outfilename)-1; i >= 0; i--) { |
| switch (outfilename[i]) { |
| case ':': |
| case '/': |
| case '\\': |
| i = 0; /* stop scanning */ |
| break; |
| case '.': |
| outfilename[i] = '\0'; /* lop off existing extension */ |
| i = 0; /* stop scanning */ |
| break; |
| default: |
| break; /* keep scanning */ |
| } |
| } |
| strcat(outfilename, default_extension); |
| } |
| |
| fprintf(stderr, "Decompressing %s => %s\n", infilename, outfilename); |
| #ifndef NO_OVERWRITE_CHECK |
| if (! is_write_ok(outfilename)) |
| goto fail; |
| #endif |
| |
| /* Open the output file. */ |
| if ((output_file = fopen(outfilename, WRITE_BINARY)) == NULL) { |
| fprintf(stderr, "%s: can't create %s\n", progname, outfilename); |
| goto fail; |
| } |
| 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); |
| |
| /* Clean up and exit */ |
| fail: |
| jpeg_destroy_decompress(&cinfo); |
| |
| if (input_file != NULL) fclose(input_file); |
| if (output_file != NULL) fclose(output_file); |
| |
| #ifdef PROGRESS_REPORT |
| end_progress_monitor((j_common_ptr) &cinfo); |
| #endif |
| |
| /* Disable signal catcher. */ |
| #ifdef NEED_SIGNAL_CATCHER |
| enable_signal_catcher((j_common_ptr) NULL); |
| #endif |
| |
| return file_index; |
| } |
| |
| |
| /* |
| * The main program. |
| */ |
| |
| int |
| main (int argc, char **argv) |
| { |
| int file_index; |
| |
| /* On Mac, fetch a command line. */ |
| #ifdef USE_CCOMMAND |
| argc = ccommand(&argv); |
| #endif |
| |
| #ifdef MSDOS |
| progname = "djpeg"; /* DOS tends to be too verbose about argv[0] */ |
| #else |
| progname = argv[0]; |
| if (progname == NULL || progname[0] == 0) |
| progname = "djpeg"; /* in case C library doesn't provide it */ |
| #endif |
| |
| /* The default maxmem must be computed only once at program startup, |
| * since releasing memory with free() won't give it back to the OS. |
| */ |
| #ifdef FREE_MEM_ESTIMATE |
| default_maxmem = FREE_MEM_ESTIMATE; |
| #else |
| default_maxmem = 0; |
| #endif |
| |
| /* Scan command line, parse switches and locate input file names */ |
| |
| if (argc < 2) |
| usage(); /* nothing on the command line?? */ |
| |
| file_index = 0; |
| |
| while (file_index < argc-1) |
| file_index = process_one_file(argc, argv, file_index); |
| |
| /* All done. */ |
| exit(EXIT_SUCCESS); |
| return 0; /* suppress no-return-value warnings */ |
| } |