| /* |
| * cjpeg.c |
| * |
| * Copyright (C) 1991-1994, Thomas G. Lane. |
| * This file is part of the Independent JPEG Group's software. |
| * For conditions of distribution and use, see the accompanying README file. |
| * |
| * This file contains a command-line user interface for the JPEG compressor. |
| * 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: |
| * cjpeg [options] inputfile outputfile |
| * cjpeg [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 |
| * cjpeg [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 isupper(), tolower() */ |
| #ifdef NEED_SIGNAL_CATCHER |
| #include <signal.h> /* to declare signal() */ |
| #endif |
| #ifdef USE_SETMODE |
| #include <fcntl.h> /* to declare setmode()'s parameter macros */ |
| /* If you have setmode() but not <io.h>, just delete this line: */ |
| #include <io.h> /* to declare setmode() */ |
| #endif |
| |
| #ifdef USE_CCOMMAND /* command-line reader for Macintosh */ |
| #ifdef __MWERKS__ |
| #include <SIOUX.h> /* Metrowerks declares it here */ |
| #endif |
| #ifdef THINK_C |
| #include <console.h> /* Think declares it here */ |
| #endif |
| #endif |
| |
| #ifdef DONT_USE_B_MODE /* define mode parameters for fopen() */ |
| #define READ_BINARY "r" |
| #define WRITE_BINARY "w" |
| #else |
| #define READ_BINARY "rb" |
| #define WRITE_BINARY "wb" |
| #endif |
| |
| #ifndef EXIT_FAILURE /* define exit() codes if not provided */ |
| #define EXIT_FAILURE 1 |
| #endif |
| #ifndef EXIT_SUCCESS |
| #ifdef VMS |
| #define EXIT_SUCCESS 1 /* VMS is very nonstandard */ |
| #else |
| #define EXIT_SUCCESS 0 |
| #endif |
| #endif |
| #ifndef EXIT_WARNING |
| #ifdef VMS |
| #define EXIT_WARNING 1 /* VMS is very nonstandard */ |
| #else |
| #define EXIT_WARNING 2 |
| #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 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 */ |
| } |
| |
| |
| /* |
| * Signal catcher to ensure that temporary files are removed before aborting. |
| * NB: for Amiga Manx C this is actually a global routine named _abort(); |
| * we put "#define signal_catcher _abort" in jconfig.h. Talk about bogus... |
| */ |
| |
| #ifdef NEED_SIGNAL_CATCHER |
| |
| static j_common_ptr sig_cinfo; |
| |
| GLOBAL void |
| signal_catcher (int signum) |
| { |
| if (sig_cinfo != NULL) { |
| if (sig_cinfo->err != NULL) /* turn off trace output */ |
| sig_cinfo->err->trace_level = 0; |
| jpeg_destroy(sig_cinfo); /* clean up memory allocation & temp files */ |
| } |
| exit(EXIT_FAILURE); |
| } |
| |
| #endif |
| |
| |
| /* |
| * Optional routine to display a percent-done figure on stderr. |
| */ |
| |
| #ifdef PROGRESS_REPORT |
| |
| METHODDEF void |
| progress_monitor (j_common_ptr cinfo) |
| { |
| cd_progress_ptr prog = (cd_progress_ptr) cinfo->progress; |
| int total_passes = prog->pub.total_passes + prog->total_extra_passes; |
| int percent_done = (int) (prog->pub.pass_counter*100L/prog->pub.pass_limit); |
| |
| if (percent_done != prog->percent_done) { |
| prog->percent_done = percent_done; |
| if (total_passes > 1) { |
| fprintf(stderr, "\rPass %d/%d: %3d%% ", |
| prog->pub.completed_passes + prog->completed_extra_passes + 1, |
| total_passes, percent_done); |
| } else { |
| fprintf(stderr, "\r %3d%% ", percent_done); |
| } |
| fflush(stderr); |
| } |
| } |
| |
| #endif |
| |
| |
| /* |
| * Argument-parsing code. |
| * The switch parser is designed to be useful with DOS-style command line |
| * syntax, ie, intermixed switches and file names, where only the switches |
| * to the left of a given file name affect processing of that file. |
| * The main program in this file doesn't actually use this capability... |
| */ |
| |
| |
| static const char * progname; /* program name for error messages */ |
| static char * outfilename; /* for -outfile switch */ |
| |
| |
| 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, " -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 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 |
| fprintf(stderr, " -maxmemory N Maximum memory to use (in kbytes)\n"); |
| fprintf(stderr, " -outfile name Specify name for output file\n"); |
| fprintf(stderr, " -verbose or -debug Emit debug output\n"); |
| fprintf(stderr, "Switches for wizards:\n"); |
| #ifdef C_ARITH_CODING_SUPPORTED |
| fprintf(stderr, " -arithmetic Use arithmetic coding\n"); |
| #endif |
| fprintf(stderr, " -baseline Force baseline output\n"); |
| #ifdef C_MULTISCAN_FILES_SUPPORTED |
| fprintf(stderr, " -nointerleave Create noninterleaved JPEG file\n"); |
| #endif |
| 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"); |
| exit(EXIT_FAILURE); |
| } |
| |
| |
| LOCAL boolean |
| keymatch (char * arg, const char * keyword, int minchars) |
| /* Case-insensitive matching of (possibly abbreviated) keyword switches. */ |
| /* keyword is the constant keyword (must be lower case already), */ |
| /* minchars is length of minimum legal abbreviation. */ |
| { |
| register int ca, ck; |
| register int nmatched = 0; |
| |
| while ((ca = *arg++) != '\0') { |
| if ((ck = *keyword++) == '\0') |
| return FALSE; /* arg longer than keyword, no good */ |
| if (isupper(ca)) /* force arg to lcase (assume ck is already) */ |
| ca = tolower(ca); |
| if (ca != ck) |
| return FALSE; /* no good */ |
| nmatched++; /* count matched characters */ |
| } |
| /* reached end of argument; fail if it's too short for unique abbrev */ |
| if (nmatched < minchars) |
| return FALSE; |
| return TRUE; /* A-OK */ |
| } |
| |
| |
| LOCAL int |
| qt_getc (FILE * file) |
| /* Read next char, skipping over any comments (# to end of line) */ |
| /* A comment/newline sequence is returned as a newline */ |
| { |
| register int ch; |
| |
| ch = getc(file); |
| if (ch == '#') { |
| do { |
| ch = getc(file); |
| } while (ch != '\n' && ch != EOF); |
| } |
| return ch; |
| } |
| |
| |
| LOCAL long |
| read_qt_integer (FILE * file) |
| /* Read an unsigned decimal integer from a quantization-table file */ |
| /* Swallows one trailing character after the integer */ |
| { |
| register int ch; |
| register long val; |
| |
| /* Skip any leading whitespace, detect EOF */ |
| do { |
| ch = qt_getc(file); |
| if (ch == EOF) |
| return EOF; |
| } while (isspace(ch)); |
| |
| if (! isdigit(ch)) { |
| fprintf(stderr, "%s: bogus data in quantization file\n", progname); |
| exit(EXIT_FAILURE); |
| } |
| |
| val = ch - '0'; |
| while (ch = qt_getc(file), isdigit(ch)) { |
| val *= 10; |
| val += ch - '0'; |
| } |
| return val; |
| } |
| |
| |
| LOCAL void |
| read_quant_tables (j_compress_ptr cinfo, char * filename, int scale_factor, |
| boolean force_baseline) |
| /* Read a set of quantization tables from the specified file. |
| * The file is plain ASCII text: decimal numbers with whitespace between. |
| * Comments preceded by '#' may be included in the file. |
| * There may be one to NUM_QUANT_TBLS tables in the file, each of 64 values. |
| * The tables are implicitly numbered 0,1,etc. |
| * NOTE: does not affect the qslots mapping, which will default to selecting |
| * table 0 for luminance (or primary) components, 1 for chrominance components. |
| * You must use -qslots if you want a different component->table mapping. |
| */ |
| { |
| /* ZIG[i] is the zigzag-order position of the i'th element of a DCT block */ |
| /* read in natural order (left to right, top to bottom). */ |
| static const int ZIG[DCTSIZE2] = { |
| 0, 1, 5, 6, 14, 15, 27, 28, |
| 2, 4, 7, 13, 16, 26, 29, 42, |
| 3, 8, 12, 17, 25, 30, 41, 43, |
| 9, 11, 18, 24, 31, 40, 44, 53, |
| 10, 19, 23, 32, 39, 45, 52, 54, |
| 20, 22, 33, 38, 46, 51, 55, 60, |
| 21, 34, 37, 47, 50, 56, 59, 61, |
| 35, 36, 48, 49, 57, 58, 62, 63 |
| }; |
| FILE * fp; |
| int tblno, i; |
| long val; |
| unsigned int table[DCTSIZE2]; |
| |
| if ((fp = fopen(filename, "r")) == NULL) { |
| fprintf(stderr, "%s: can't open %s\n", progname, filename); |
| exit(EXIT_FAILURE); |
| } |
| tblno = 0; |
| |
| while ((val = read_qt_integer(fp)) != EOF) { /* read 1st element of table */ |
| if (tblno >= NUM_QUANT_TBLS) { |
| fprintf(stderr, "%s: too many tables in file %s\n", progname, filename); |
| exit(EXIT_FAILURE); |
| } |
| table[0] = (unsigned int) val; |
| for (i = 1; i < DCTSIZE2; i++) { |
| if ((val = read_qt_integer(fp)) == EOF) { |
| fprintf(stderr, "%s: incomplete table in file %s\n", progname, filename); |
| exit(EXIT_FAILURE); |
| } |
| table[ZIG[i]] = (unsigned int) val; |
| } |
| jpeg_add_quant_table(cinfo, tblno, table, scale_factor, force_baseline); |
| tblno++; |
| } |
| |
| fclose(fp); |
| } |
| |
| |
| LOCAL void |
| set_quant_slots (j_compress_ptr cinfo, char *arg) |
| /* Process a quantization-table-selectors parameter string, of the form |
| * N[,N,...] |
| * If there are more components than parameters, the last value is replicated. |
| */ |
| { |
| int val = 0; /* default table # */ |
| int ci; |
| char ch; |
| |
| for (ci = 0; ci < MAX_COMPONENTS; ci++) { |
| if (*arg) { |
| ch = ','; /* if not set by sscanf, will be ',' */ |
| if (sscanf(arg, "%d%c", &val, &ch) < 1) |
| usage(); |
| if (ch != ',') |
| usage(); /* syntax check */ |
| if (val < 0 || val >= NUM_QUANT_TBLS) { |
| fprintf(stderr, "JPEG quantization tables are numbered 0..%d\n", |
| NUM_QUANT_TBLS-1); |
| exit(EXIT_FAILURE); |
| } |
| cinfo->comp_info[ci].quant_tbl_no = val; |
| while (*arg && *arg++ != ',') /* advance to next segment of arg string */ |
| ; |
| } else { |
| /* reached end of parameter, set remaining components to last table */ |
| cinfo->comp_info[ci].quant_tbl_no = val; |
| } |
| } |
| } |
| |
| |
| LOCAL void |
| set_sample_factors (j_compress_ptr cinfo, char *arg) |
| /* Process a sample-factors parameter string, of the form |
| * HxV[,HxV,...] |
| * If there are more components than parameters, "1x1" is assumed. |
| */ |
| { |
| int ci, val1, val2; |
| char ch1, ch2; |
| |
| for (ci = 0; ci < MAX_COMPONENTS; ci++) { |
| if (*arg) { |
| ch2 = ','; /* if not set by sscanf, will be ',' */ |
| if (sscanf(arg, "%d%c%d%c", &val1, &ch1, &val2, &ch2) < 3) |
| usage(); |
| if ((ch1 != 'x' && ch1 != 'X') || ch2 != ',') |
| usage(); /* syntax check */ |
| if (val1 <= 0 || val1 > 4 || val2 <= 0 || val2 > 4) { |
| fprintf(stderr, "JPEG sampling factors must be 1..4\n"); |
| exit(EXIT_FAILURE); |
| } |
| cinfo->comp_info[ci].h_samp_factor = val1; |
| cinfo->comp_info[ci].v_samp_factor = val2; |
| while (*arg && *arg++ != ',') /* advance to next segment of arg string */ |
| ; |
| } else { |
| /* reached end of parameter, set remaining components to 1x1 sampling */ |
| cinfo->comp_info[ci].h_samp_factor = 1; |
| cinfo->comp_info[ci].v_samp_factor = 1; |
| } |
| } |
| } |
| |
| |
| 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; |
| char * qtablefile = NULL; /* saves -qtables filename if any */ |
| char * qslotsarg = NULL; /* saves -qslots parm if any */ |
| char * samplearg = NULL; /* saves -sample 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 */ |
| is_targa = FALSE; |
| 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, "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 output (8-bit quantizer values). */ |
| force_baseline = TRUE; |
| |
| } 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); |
| 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, "nointerleave", 3)) { |
| /* Create noninterleaved file. */ |
| #ifdef C_MULTISCAN_FILES_SUPPORTED |
| cinfo->interleave = FALSE; |
| #else |
| fprintf(stderr, "%s: sorry, multiple-scan support was not compiled\n", |
| progname); |
| exit(EXIT_FAILURE); |
| #endif |
| |
| } 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, "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, "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 */ |
| read_quant_tables(cinfo, qtablefile, q_scale_factor, force_baseline); |
| |
| if (qslotsarg != NULL) /* process -qslots if it was present */ |
| set_quant_slots(cinfo, qslotsarg); |
| |
| if (samplearg != NULL) /* process -sample if it was present */ |
| set_sample_factors(cinfo, samplearg); |
| |
| } |
| |
| return argn; /* return index of next arg (file name) */ |
| } |
| |
| |
| /* |
| * The main program. |
| */ |
| |
| GLOBAL int |
| main (int argc, char **argv) |
| { |
| struct jpeg_compress_struct cinfo; |
| struct jpeg_error_mgr jerr; |
| #ifdef PROGRESS_REPORT |
| struct cdjpeg_progress_mgr progress; |
| #endif |
| int file_index; |
| cjpeg_source_ptr src_mgr; |
| 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 = "cjpeg"; /* in case C library doesn't provide it */ |
| |
| /* 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 |
| sig_cinfo = (j_common_ptr) &cinfo; |
| signal(SIGINT, signal_catcher); |
| #ifdef SIGTERM /* not all systems have SIGTERM */ |
| signal(SIGTERM, signal_catcher); |
| #endif |
| #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 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. |
| */ |
| |
| 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 */ |
| #ifdef USE_SETMODE /* need to hack file mode? */ |
| setmode(fileno(stdin), O_BINARY); |
| #endif |
| #ifdef USE_FDOPEN /* need to re-open in binary mode? */ |
| if ((input_file = fdopen(fileno(stdin), READ_BINARY)) == NULL) { |
| fprintf(stderr, "%s: can't open stdin\n", progname); |
| exit(EXIT_FAILURE); |
| } |
| #else |
| input_file = stdin; |
| #endif |
| } |
| |
| /* 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 */ |
| #ifdef USE_SETMODE /* need to hack file mode? */ |
| setmode(fileno(stdout), O_BINARY); |
| #endif |
| #ifdef USE_FDOPEN /* need to re-open in binary mode? */ |
| if ((output_file = fdopen(fileno(stdout), WRITE_BINARY)) == NULL) { |
| fprintf(stderr, "%s: can't open stdout\n", progname); |
| exit(EXIT_FAILURE); |
| } |
| #else |
| output_file = stdout; |
| #endif |
| } |
| |
| #ifdef PROGRESS_REPORT |
| /* Enable progress display, unless trace output is on */ |
| if (jerr.trace_level == 0) { |
| progress.pub.progress_monitor = progress_monitor; |
| progress.completed_extra_passes = 0; |
| progress.total_extra_passes = 0; |
| progress.percent_done = -1; |
| cinfo.progress = &progress.pub; |
| } |
| #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, 0, TRUE); |
| |
| /* 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); |
| jpeg_destroy_compress(&cinfo); |
| |
| /* Close files, if we opened them */ |
| if (input_file != stdin) |
| fclose(input_file); |
| if (output_file != stdout) |
| fclose(output_file); |
| |
| #ifdef PROGRESS_REPORT |
| /* Clear away progress display */ |
| if (jerr.trace_level == 0) { |
| fprintf(stderr, "\r \r"); |
| fflush(stderr); |
| } |
| #endif |
| |
| /* All done. */ |
| exit(jerr.num_warnings ? EXIT_WARNING : EXIT_SUCCESS); |
| return 0; /* suppress no-return-value warnings */ |
| } |