| /* |
| * alternate cjpeg.c |
| * |
| * Copyright (C) 1991-1998, 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 compressor. |
| * One or more input files are named on the command line, and output file |
| * names are created by substituting ".jpg" for the input file's extension. |
| */ |
| |
| #include "cdjpeg.h" /* Common decls for cjpeg/djpeg applications */ |
| #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 |
| |
| #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 routine determines what format the input file is, |
| * and selects the appropriate input-reading module. |
| * |
| * To determine which family of input formats the file belongs to, |
| * we may look only at the first byte of the file, since C does not |
| * guarantee that more than one character can be pushed back with ungetc. |
| * Looking at additional bytes would require one of these approaches: |
| * 1) assume we can fseek() the input file (fails for piped input); |
| * 2) assume we can push back more than one character (works in |
| * some C implementations, but unportable); |
| * 3) provide our own buffering (breaks input readers that want to use |
| * stdio directly, such as the RLE library); |
| * or 4) don't put back the data, and modify the input_init methods to assume |
| * they start reading after the start of file (also breaks RLE library). |
| * #1 is attractive for MS-DOS but is untenable on Unix. |
| * |
| * The most portable solution for file types that can't be identified by their |
| * first byte is to make the user tell us what they are. This is also the |
| * only approach for "raw" file types that contain only arbitrary values. |
| * We presently apply this method for Targa files. Most of the time Targa |
| * files start with 0x00, so we recognize that case. Potentially, however, |
| * a Targa file could start with any byte value (byte 0 is the length of the |
| * seldom-used ID field), so we provide a switch to force Targa input mode. |
| */ |
| |
| static boolean is_targa; /* records user -targa switch */ |
| |
| |
| LOCAL(cjpeg_source_ptr) |
| select_file_type (j_compress_ptr cinfo, FILE * infile) |
| { |
| int c; |
| |
| if (is_targa) { |
| #ifdef TARGA_SUPPORTED |
| return jinit_read_targa(cinfo); |
| #else |
| ERREXIT(cinfo, JERR_TGA_NOTCOMP); |
| #endif |
| } |
| |
| if ((c = getc(infile)) == EOF) |
| ERREXIT(cinfo, JERR_INPUT_EMPTY); |
| if (ungetc(c, infile) == EOF) |
| ERREXIT(cinfo, JERR_UNGETC_FAILED); |
| |
| switch (c) { |
| #ifdef BMP_SUPPORTED |
| case 'B': |
| return jinit_read_bmp(cinfo); |
| #endif |
| #ifdef GIF_SUPPORTED |
| case 'G': |
| return jinit_read_gif(cinfo); |
| #endif |
| #ifdef PPM_SUPPORTED |
| case 'P': |
| return jinit_read_ppm(cinfo); |
| #endif |
| #ifdef RLE_SUPPORTED |
| case 'R': |
| return jinit_read_rle(cinfo); |
| #endif |
| #ifdef TARGA_SUPPORTED |
| case 0x00: |
| return jinit_read_targa(cinfo); |
| #endif |
| default: |
| ERREXIT(cinfo, JERR_UNKNOWN_FORMAT); |
| break; |
| } |
| |
| return NULL; /* suppress compiler warnings */ |
| } |
| |
| |
| /* |
| * 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, but extension .jpg\n"); |
| |
| fprintf(stderr, "Switches (names may be abbreviated):\n"); |
| fprintf(stderr, " -quality N Compression quality (0..100; 5-95 is useful range)\n"); |
| fprintf(stderr, " -grayscale Create monochrome JPEG file\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 |
| #ifdef TARGA_SUPPORTED |
| fprintf(stderr, " -targa Input file is Targa format (usually not needed)\n"); |
| #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, " -restart N Set restart interval in rows, or in blocks with B\n"); |
| #ifdef INPUT_SMOOTHING_SUPPORTED |
| fprintf(stderr, " -smooth N Smooth dithered input (N=1..100 is strength)\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"); |
| fprintf(stderr, "Switches for wizards:\n"); |
| #ifdef C_ARITH_CODING_SUPPORTED |
| fprintf(stderr, " -arithmetic Use arithmetic coding\n"); |
| #endif |
| fprintf(stderr, " -baseline Force baseline quantization tables\n"); |
| fprintf(stderr, " -qtables file Use quantization tables given in file\n"); |
| fprintf(stderr, " -qslots N[,...] Set component quantization tables\n"); |
| fprintf(stderr, " -sample HxV[,...] Set component sampling factors\n"); |
| #ifdef C_MULTISCAN_FILES_SUPPORTED |
| fprintf(stderr, " -scans file Create multi-scan JPEG per script file\n"); |
| #endif |
| 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_compress_ptr cinfo, int argc, char **argv, |
| int last_file_arg_seen, boolean for_real) |
| /* Parse optional switches. |
| * Returns argv[] index of first file-name argument (== argc if none). |
| * Any file names with indexes <= last_file_arg_seen are ignored; |
| * they have presumably been processed in a previous iteration. |
| * (Pass 0 for last_file_arg_seen on the first or only iteration.) |
| * for_real is FALSE on the first (dummy) pass; we may skip any expensive |
| * processing. |
| */ |
| { |
| int argn; |
| char * arg; |
| int quality; /* -quality parameter */ |
| int q_scale_factor; /* scaling percentage for -qtables */ |
| boolean force_baseline; |
| boolean simple_progressive; |
| char * qtablefile = NULL; /* saves -qtables filename if any */ |
| char * qslotsarg = NULL; /* saves -qslots parm if any */ |
| char * samplearg = NULL; /* saves -sample parm if any */ |
| char * scansarg = NULL; /* saves -scans parm if any */ |
| |
| /* Set up default JPEG parameters. */ |
| /* Note that default -quality level need not, and does not, |
| * match the default scaling for an explicit -qtables argument. |
| */ |
| quality = 75; /* default -quality value */ |
| q_scale_factor = 100; /* default to no scaling for -qtables */ |
| force_baseline = FALSE; /* by default, allow 16-bit quantizers */ |
| simple_progressive = FALSE; |
| is_targa = FALSE; |
| 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, "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, "baseline", 1)) { |
| /* Force baseline-compatible output (8-bit quantizer values). */ |
| force_baseline = 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 DCT 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, "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 CJPEG, 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_forward_dct(cinfo, JDCT_ISLOW)); |
| #endif |
| #ifdef DCT_IFAST_SUPPORTED |
| print_simd_info(stderr, "Fast integer DCT (-dct fast) :", |
| jpeg_simd_forward_dct(cinfo, JDCT_IFAST)); |
| #endif |
| #ifdef DCT_FLOAT_SUPPORTED |
| print_simd_info(stderr, "Floating-point DCT (-dct float) :", |
| jpeg_simd_forward_dct(cinfo, JDCT_FLOAT)); |
| #endif |
| print_simd_info(stderr, "Downsampling (-sample 2x2 or 2x1) :", |
| jpeg_simd_downsampler(cinfo)); |
| print_simd_info(stderr, "Colorspace conversion (RGB->YCbCr) :", |
| jpeg_simd_color_converter(cinfo)); |
| fprintf(stderr, "\n"); |
| #endif /* !JSIMD_MODEINFO_NOT_SUPPORTED */ |
| printed_version = TRUE; |
| } |
| cinfo->err->trace_level++; |
| |
| } else if (keymatch(arg, "grayscale", 2) || keymatch(arg, "greyscale",2)) { |
| /* Force a monochrome JPEG file to be generated. */ |
| jpeg_set_colorspace(cinfo, JCS_GRAYSCALE); |
| |
| } 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, "quality", 1)) { |
| /* Quality factor (quantization table scaling factor). */ |
| if (++argn >= argc) /* advance to next argument */ |
| usage(); |
| if (sscanf(argv[argn], "%d", &quality) != 1) |
| usage(); |
| /* Change scale factor in case -qtables is present. */ |
| q_scale_factor = jpeg_quality_scaling(quality); |
| |
| } else if (keymatch(arg, "qslots", 2)) { |
| /* Quantization table slot numbers. */ |
| if (++argn >= argc) /* advance to next argument */ |
| usage(); |
| qslotsarg = argv[argn]; |
| /* Must delay setting qslots until after we have processed any |
| * colorspace-determining switches, since jpeg_set_colorspace sets |
| * default quant table numbers. |
| */ |
| |
| } else if (keymatch(arg, "qtables", 2)) { |
| /* Quantization tables fetched from file. */ |
| if (++argn >= argc) /* advance to next argument */ |
| usage(); |
| qtablefile = argv[argn]; |
| /* We postpone actually reading the file in case -quality comes later. */ |
| |
| } 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, "sample", 2)) { |
| /* Set sampling factors. */ |
| if (++argn >= argc) /* advance to next argument */ |
| usage(); |
| samplearg = argv[argn]; |
| /* Must delay setting sample factors until after we have processed any |
| * colorspace-determining switches, since jpeg_set_colorspace sets |
| * default sampling factors. |
| */ |
| |
| } else if (keymatch(arg, "scans", 2)) { |
| /* 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, "smooth", 2)) { |
| /* Set input smoothing factor. */ |
| int val; |
| |
| if (++argn >= argc) /* advance to next argument */ |
| usage(); |
| if (sscanf(argv[argn], "%d", &val) != 1) |
| usage(); |
| if (val < 0 || val > 100) |
| usage(); |
| cinfo->smoothing_factor = val; |
| |
| } else if (keymatch(arg, "targa", 1)) { |
| /* Input file is Targa format. */ |
| is_targa = TRUE; |
| |
| } else { |
| usage(); /* bogus switch */ |
| } |
| } |
| |
| /* Post-switch-scanning cleanup */ |
| |
| if (for_real) { |
| |
| /* Set quantization tables for selected quality. */ |
| /* Some or all may be overridden if -qtables is present. */ |
| jpeg_set_quality(cinfo, quality, force_baseline); |
| |
| if (qtablefile != NULL) /* process -qtables if it was present */ |
| if (! read_quant_tables(cinfo, qtablefile, |
| q_scale_factor, force_baseline)) |
| usage(); |
| |
| if (qslotsarg != NULL) /* process -qslots if it was present */ |
| if (! set_quant_slots(cinfo, qslotsarg)) |
| usage(); |
| |
| if (samplearg != NULL) /* process -sample if it was present */ |
| if (! set_sample_factors(cinfo, samplearg)) |
| usage(); |
| |
| #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) */ |
| } |
| |
| |
| /* |
| * 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_compress_struct cinfo; |
| struct jpeg_error_mgr jerr; |
| char *infilename; |
| char workfilename[PATH_MAX]; |
| #ifdef PROGRESS_REPORT |
| struct cdjpeg_progress_mgr progress; |
| #endif |
| int file_index; |
| cjpeg_source_ptr src_mgr; |
| FILE * input_file = NULL; |
| FILE * output_file = NULL; |
| JDIMENSION num_scanlines; |
| |
| /* Initialize the JPEG compression object with default error handling. */ |
| cinfo.err = jpeg_std_error(&jerr); |
| jpeg_create_compress(&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; |
| |
| /* Now safe to enable signal catcher. */ |
| #ifdef NEED_SIGNAL_CATCHER |
| enable_signal_catcher((j_common_ptr) &cinfo); |
| #endif |
| |
| /* Initialize JPEG parameters. |
| * Much of this may be overridden later. |
| * In particular, we don't yet know the input file's color space, |
| * but we need to provide some value for jpeg_set_defaults() to work. |
| */ |
| |
| cinfo.in_color_space = JCS_RGB; /* arbitrary guess */ |
| jpeg_set_defaults(&cinfo); |
| |
| /* 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. |
| */ |
| |
| 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 |
| |
| /* Figure out the input file format, and set up to read it. */ |
| src_mgr = select_file_type(&cinfo, input_file); |
| src_mgr->input_file = input_file; |
| |
| /* Read the input file header to obtain file size & colorspace. */ |
| (*src_mgr->start_input) (&cinfo, src_mgr); |
| |
| /* Now that we know input colorspace, fix colorspace-dependent defaults */ |
| jpeg_default_colorspace(&cinfo); |
| |
| /* Adjust default compression parameters by re-parsing the options */ |
| file_index = parse_switches(&cinfo, argc, argv, old_file_index, TRUE); |
| |
| /* If user didn't supply -outfile switch, select output file name. */ |
| if (outfilename == NULL) { |
| int i; |
| |
| outfilename = workfilename; |
| /* Make outfilename be infilename with .jpg substituted for 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, ".jpg"); |
| } |
| |
| fprintf(stderr, "Compressing %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; |
| } |
| |
| /* Specify data destination for compression */ |
| jpeg_stdio_dest(&cinfo, output_file); |
| |
| /* Start compressor */ |
| jpeg_start_compress(&cinfo, TRUE); |
| |
| /* Process data */ |
| while (cinfo.next_scanline < cinfo.image_height) { |
| num_scanlines = (*src_mgr->get_pixel_rows) (&cinfo, src_mgr); |
| (void) jpeg_write_scanlines(&cinfo, src_mgr->buffer, num_scanlines); |
| } |
| |
| /* Finish compression and release memory */ |
| (*src_mgr->finish_input) (&cinfo, src_mgr); |
| jpeg_finish_compress(&cinfo); |
| |
| /* Clean up and exit */ |
| fail: |
| jpeg_destroy_compress(&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 = "cjpeg"; /* DOS tends to be too verbose about argv[0] */ |
| #else |
| progname = argv[0]; |
| if (progname == NULL || progname[0] == 0) |
| progname = "cjpeg"; /* 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 */ |
| } |