| /* |
| * jpegtran.c |
| * |
| * This file was part of the Independent JPEG Group's software: |
| * Copyright (C) 1995-2019, Thomas G. Lane, Guido Vollbeding. |
| * libjpeg-turbo Modifications: |
| * Copyright (C) 2010, 2014, 2017, 2019-2022, D. R. Commander. |
| * For conditions of distribution and use, see the accompanying README.ijg |
| * file. |
| * |
| * This file contains a command-line user interface for JPEG transcoding. |
| * It is very similar to cjpeg.c, and partly to djpeg.c, but provides |
| * lossless transcoding between different JPEG file formats. It also |
| * provides some lossless and sort-of-lossless transformations of JPEG data. |
| */ |
| |
| #ifdef _MSC_VER |
| #define _CRT_SECURE_NO_DEPRECATE |
| #endif |
| |
| #include "cdjpeg.h" /* Common decls for cjpeg/djpeg applications */ |
| #include "transupp.h" /* Support routines for jpegtran */ |
| #include "jversion.h" /* for version message */ |
| #include "jconfigint.h" |
| |
| |
| /* |
| * Argument-parsing code. |
| * The switch parser is designed to be useful with DOS-style command line |
| * syntax, ie, intermixed switches and file names, where only the switches |
| * to the left of a given file name affect processing of that file. |
| * The main program in this file doesn't actually use this capability... |
| */ |
| |
| |
| static const char *progname; /* program name for error messages */ |
| static char *icc_filename; /* for -icc switch */ |
| static JDIMENSION max_scans; /* for -maxscans switch */ |
| static char *outfilename; /* for -outfile switch */ |
| static char *dropfilename; /* for -drop switch */ |
| static boolean report; /* for -report switch */ |
| static boolean strict; /* for -strict switch */ |
| static JCOPY_OPTION copyoption; /* -copy switch */ |
| static jpeg_transform_info transformoption; /* image transformation options */ |
| |
| |
| 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, " -copy none Copy no extra markers from source file\n"); |
| fprintf(stderr, " -copy comments Copy only comment markers (default)\n"); |
| fprintf(stderr, " -copy icc Copy only ICC profile markers\n"); |
| fprintf(stderr, " -copy all Copy all extra markers\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 |
| fprintf(stderr, "Switches for modifying the image:\n"); |
| #if TRANSFORMS_SUPPORTED |
| fprintf(stderr, " -crop WxH+X+Y Crop to a rectangular region\n"); |
| fprintf(stderr, " -drop +X+Y filename Drop (insert) another image\n"); |
| fprintf(stderr, " -flip [horizontal|vertical] Mirror image (left-right or top-bottom)\n"); |
| fprintf(stderr, " -grayscale Reduce to grayscale (omit color data)\n"); |
| fprintf(stderr, " -perfect Fail if there is non-transformable edge blocks\n"); |
| fprintf(stderr, " -rotate [90|180|270] Rotate image (degrees clockwise)\n"); |
| #endif |
| #if TRANSFORMS_SUPPORTED |
| fprintf(stderr, " -transpose Transpose image\n"); |
| fprintf(stderr, " -transverse Transverse transpose image\n"); |
| fprintf(stderr, " -trim Drop non-transformable edge blocks\n"); |
| fprintf(stderr, " with -drop: Requantize drop file to match source file\n"); |
| fprintf(stderr, " -wipe WxH+X+Y Wipe (gray out) a rectangular region\n"); |
| #endif |
| fprintf(stderr, "Switches for advanced users:\n"); |
| #ifdef C_ARITH_CODING_SUPPORTED |
| fprintf(stderr, " -arithmetic Use arithmetic coding\n"); |
| #endif |
| fprintf(stderr, " -icc FILE Embed ICC profile contained in FILE\n"); |
| fprintf(stderr, " -restart N Set restart interval in rows, or in blocks with B\n"); |
| fprintf(stderr, " -maxmemory N Maximum memory to use (in kbytes)\n"); |
| fprintf(stderr, " -maxscans N Maximum number of scans to allow in input file\n"); |
| fprintf(stderr, " -outfile name Specify name for output file\n"); |
| fprintf(stderr, " -report Report transformation progress\n"); |
| fprintf(stderr, " -strict Treat all warnings as fatal\n"); |
| fprintf(stderr, " -verbose or -debug Emit debug output\n"); |
| fprintf(stderr, " -version Print version information and exit\n"); |
| fprintf(stderr, "Switches for wizards:\n"); |
| #ifdef C_MULTISCAN_FILES_SUPPORTED |
| fprintf(stderr, " -scans FILE Create multi-scan JPEG per script FILE\n"); |
| #endif |
| exit(EXIT_FAILURE); |
| } |
| |
| |
| LOCAL(void) |
| select_transform(JXFORM_CODE transform) |
| /* Silly little routine to detect multiple transform options, |
| * which we can't handle. |
| */ |
| { |
| #if TRANSFORMS_SUPPORTED |
| if (transformoption.transform == JXFORM_NONE || |
| transformoption.transform == transform) { |
| transformoption.transform = transform; |
| } else { |
| fprintf(stderr, "%s: can only do one image transformation at a time\n", |
| progname); |
| usage(); |
| } |
| #else |
| fprintf(stderr, "%s: sorry, image transformation was not compiled\n", |
| progname); |
| exit(EXIT_FAILURE); |
| #endif |
| } |
| |
| |
| 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; |
| boolean simple_progressive; |
| char *scansarg = NULL; /* saves -scans parm if any */ |
| |
| /* Set up default JPEG parameters. */ |
| simple_progressive = FALSE; |
| icc_filename = NULL; |
| max_scans = 0; |
| outfilename = NULL; |
| report = FALSE; |
| strict = FALSE; |
| copyoption = JCOPYOPT_DEFAULT; |
| transformoption.transform = JXFORM_NONE; |
| transformoption.perfect = FALSE; |
| transformoption.trim = FALSE; |
| transformoption.force_grayscale = FALSE; |
| transformoption.crop = FALSE; |
| transformoption.slow_hflip = FALSE; |
| cinfo->err->trace_level = 0; |
| |
| /* Scan command line options, adjust parameters */ |
| |
| for (argn = 1; argn < argc; argn++) { |
| arg = argv[argn]; |
| if (*arg != '-') { |
| /* Not a switch, must be a file name argument */ |
| if (argn <= last_file_arg_seen) { |
| outfilename = NULL; /* -outfile applies to just one input file */ |
| continue; /* ignore this name if previously processed */ |
| } |
| break; /* else done parsing switches */ |
| } |
| arg++; /* advance past switch marker character */ |
| |
| if (keymatch(arg, "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, "copy", 2)) { |
| /* Select which extra markers to copy. */ |
| if (++argn >= argc) /* advance to next argument */ |
| usage(); |
| if (keymatch(argv[argn], "none", 1)) { |
| copyoption = JCOPYOPT_NONE; |
| } else if (keymatch(argv[argn], "comments", 1)) { |
| copyoption = JCOPYOPT_COMMENTS; |
| } else if (keymatch(argv[argn], "icc", 1)) { |
| copyoption = JCOPYOPT_ICC; |
| } else if (keymatch(argv[argn], "all", 1)) { |
| copyoption = JCOPYOPT_ALL; |
| } else |
| usage(); |
| |
| } else if (keymatch(arg, "crop", 2)) { |
| /* Perform lossless cropping. */ |
| #if TRANSFORMS_SUPPORTED |
| if (++argn >= argc) /* advance to next argument */ |
| usage(); |
| if (transformoption.crop /* reject multiple crop/drop/wipe requests */ || |
| !jtransform_parse_crop_spec(&transformoption, argv[argn])) { |
| fprintf(stderr, "%s: bogus -crop argument '%s'\n", |
| progname, argv[argn]); |
| exit(EXIT_FAILURE); |
| } |
| #else |
| select_transform(JXFORM_NONE); /* force an error */ |
| #endif |
| |
| } else if (keymatch(arg, "drop", 2)) { |
| #if TRANSFORMS_SUPPORTED |
| if (++argn >= argc) /* advance to next argument */ |
| usage(); |
| if (transformoption.crop /* reject multiple crop/drop/wipe requests */ || |
| !jtransform_parse_crop_spec(&transformoption, argv[argn]) || |
| transformoption.crop_width_set != JCROP_UNSET || |
| transformoption.crop_height_set != JCROP_UNSET) { |
| fprintf(stderr, "%s: bogus -drop argument '%s'\n", |
| progname, argv[argn]); |
| exit(EXIT_FAILURE); |
| } |
| if (++argn >= argc) /* advance to next argument */ |
| usage(); |
| dropfilename = argv[argn]; |
| select_transform(JXFORM_DROP); |
| #else |
| select_transform(JXFORM_NONE); /* force an error */ |
| #endif |
| |
| } else if (keymatch(arg, "debug", 1) || keymatch(arg, "verbose", 1)) { |
| /* Enable debug printouts. */ |
| /* On first -d, print version identification */ |
| static boolean printed_version = FALSE; |
| |
| if (!printed_version) { |
| fprintf(stderr, "%s version %s (build %s)\n", |
| PACKAGE_NAME, VERSION, BUILD); |
| fprintf(stderr, "%s\n\n", JCOPYRIGHT); |
| fprintf(stderr, "Emulating The Independent JPEG Group's software, version %s\n\n", |
| JVERSION); |
| printed_version = TRUE; |
| } |
| cinfo->err->trace_level++; |
| |
| } else if (keymatch(arg, "version", 4)) { |
| fprintf(stderr, "%s version %s (build %s)\n", |
| PACKAGE_NAME, VERSION, BUILD); |
| exit(EXIT_SUCCESS); |
| |
| } else if (keymatch(arg, "flip", 1)) { |
| /* Mirror left-right or top-bottom. */ |
| if (++argn >= argc) /* advance to next argument */ |
| usage(); |
| if (keymatch(argv[argn], "horizontal", 1)) |
| select_transform(JXFORM_FLIP_H); |
| else if (keymatch(argv[argn], "vertical", 1)) |
| select_transform(JXFORM_FLIP_V); |
| else |
| usage(); |
| |
| } else if (keymatch(arg, "grayscale", 1) || |
| keymatch(arg, "greyscale", 1)) { |
| /* Force to grayscale. */ |
| #if TRANSFORMS_SUPPORTED |
| transformoption.force_grayscale = TRUE; |
| #else |
| select_transform(JXFORM_NONE); /* force an error */ |
| #endif |
| |
| } else if (keymatch(arg, "icc", 1)) { |
| /* Set ICC filename. */ |
| if (++argn >= argc) /* advance to next argument */ |
| usage(); |
| icc_filename = argv[argn]; |
| |
| } else if (keymatch(arg, "maxmemory", 3)) { |
| /* Maximum memory in Kb (or Mb with 'm'). */ |
| long lval; |
| char ch = 'x'; |
| |
| if (++argn >= argc) /* advance to next argument */ |
| usage(); |
| if (sscanf(argv[argn], "%ld%c", &lval, &ch) < 1) |
| usage(); |
| if (ch == 'm' || ch == 'M') |
| lval *= 1000L; |
| cinfo->mem->max_memory_to_use = lval * 1000L; |
| |
| } else if (keymatch(arg, "maxscans", 4)) { |
| if (++argn >= argc) /* advance to next argument */ |
| usage(); |
| if (sscanf(argv[argn], "%u", &max_scans) != 1) |
| usage(); |
| |
| } else if (keymatch(arg, "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, "perfect", 2)) { |
| /* Fail if there is any partial edge MCUs that the transform can't |
| * handle. */ |
| transformoption.perfect = TRUE; |
| |
| } else if (keymatch(arg, "progressive", 2)) { |
| /* 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, "report", 3)) { |
| report = TRUE; |
| |
| } 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, "rotate", 2)) { |
| /* Rotate 90, 180, or 270 degrees (measured clockwise). */ |
| if (++argn >= argc) /* advance to next argument */ |
| usage(); |
| if (keymatch(argv[argn], "90", 2)) |
| select_transform(JXFORM_ROT_90); |
| else if (keymatch(argv[argn], "180", 3)) |
| select_transform(JXFORM_ROT_180); |
| else if (keymatch(argv[argn], "270", 3)) |
| select_transform(JXFORM_ROT_270); |
| else |
| usage(); |
| |
| } else if (keymatch(arg, "scans", 1)) { |
| /* 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, "strict", 2)) { |
| strict = TRUE; |
| |
| } else if (keymatch(arg, "transpose", 1)) { |
| /* Transpose (across UL-to-LR axis). */ |
| select_transform(JXFORM_TRANSPOSE); |
| |
| } else if (keymatch(arg, "transverse", 6)) { |
| /* Transverse transpose (across UR-to-LL axis). */ |
| select_transform(JXFORM_TRANSVERSE); |
| |
| } else if (keymatch(arg, "trim", 3)) { |
| /* Trim off any partial edge MCUs that the transform can't handle. */ |
| transformoption.trim = TRUE; |
| |
| } else if (keymatch(arg, "wipe", 1)) { |
| #if TRANSFORMS_SUPPORTED |
| if (++argn >= argc) /* advance to next argument */ |
| usage(); |
| if (transformoption.crop /* reject multiple crop/drop/wipe requests */ || |
| !jtransform_parse_crop_spec(&transformoption, argv[argn])) { |
| fprintf(stderr, "%s: bogus -wipe argument '%s'\n", |
| progname, argv[argn]); |
| exit(EXIT_FAILURE); |
| } |
| select_transform(JXFORM_WIPE); |
| #else |
| select_transform(JXFORM_NONE); /* force an error */ |
| #endif |
| |
| } else { |
| usage(); /* bogus switch */ |
| } |
| } |
| |
| /* Post-switch-scanning cleanup */ |
| |
| if (for_real) { |
| |
| #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) */ |
| } |
| |
| |
| METHODDEF(void) |
| my_emit_message(j_common_ptr cinfo, int msg_level) |
| { |
| if (msg_level < 0) { |
| /* Treat warning as fatal */ |
| cinfo->err->error_exit(cinfo); |
| } else { |
| if (cinfo->err->trace_level >= msg_level) |
| cinfo->err->output_message(cinfo); |
| } |
| } |
| |
| |
| /* |
| * The main program. |
| */ |
| |
| int |
| #ifdef GTEST |
| jpegtran(int argc, char **argv) |
| #else |
| main(int argc, char **argv) |
| #endif |
| { |
| struct jpeg_decompress_struct srcinfo; |
| #if TRANSFORMS_SUPPORTED |
| struct jpeg_decompress_struct dropinfo; |
| struct jpeg_error_mgr jdroperr; |
| FILE *drop_file; |
| #endif |
| struct jpeg_compress_struct dstinfo; |
| struct jpeg_error_mgr jsrcerr, jdsterr; |
| struct cdjpeg_progress_mgr src_progress, dst_progress; |
| jvirt_barray_ptr *src_coef_arrays; |
| jvirt_barray_ptr *dst_coef_arrays; |
| int file_index; |
| /* We assume all-in-memory processing and can therefore use only a |
| * single file pointer for sequential input and output operation. |
| */ |
| FILE *fp; |
| FILE *icc_file; |
| JOCTET *icc_profile = NULL; |
| long icc_len = 0; |
| |
| progname = argv[0]; |
| if (progname == NULL || progname[0] == 0) |
| progname = "jpegtran"; /* in case C library doesn't provide it */ |
| |
| /* Initialize the JPEG decompression object with default error handling. */ |
| srcinfo.err = jpeg_std_error(&jsrcerr); |
| jpeg_create_decompress(&srcinfo); |
| /* Initialize the JPEG compression object with default error handling. */ |
| dstinfo.err = jpeg_std_error(&jdsterr); |
| jpeg_create_compress(&dstinfo); |
| |
| /* Scan command line to find file names. |
| * It is convenient to use just one switch-parsing routine, but the switch |
| * values read here are mostly ignored; we will rescan the switches after |
| * opening the input file. Also note that most of the switches affect the |
| * destination JPEG object, so we parse into that and then copy over what |
| * needs to affect the source too. |
| */ |
| |
| file_index = parse_switches(&dstinfo, argc, argv, 0, FALSE); |
| jsrcerr.trace_level = jdsterr.trace_level; |
| srcinfo.mem->max_memory_to_use = dstinfo.mem->max_memory_to_use; |
| |
| if (strict) |
| jsrcerr.emit_message = my_emit_message; |
| |
| #ifdef TWO_FILE_COMMANDLINE |
| /* Must have either -outfile switch or explicit output file name */ |
| if (outfilename == NULL) { |
| if (file_index != argc - 2) { |
| fprintf(stderr, "%s: must name one input and one output file\n", |
| progname); |
| usage(); |
| } |
| outfilename = argv[file_index + 1]; |
| } else { |
| if (file_index != argc - 1) { |
| fprintf(stderr, "%s: must name one input and one output file\n", |
| progname); |
| usage(); |
| } |
| } |
| #else |
| /* Unix style: expect zero or one file name */ |
| if (file_index < argc - 1) { |
| fprintf(stderr, "%s: only one input file\n", progname); |
| usage(); |
| } |
| #endif /* TWO_FILE_COMMANDLINE */ |
| |
| /* Open the input file. */ |
| if (file_index < argc) { |
| if ((fp = fopen(argv[file_index], READ_BINARY)) == NULL) { |
| fprintf(stderr, "%s: can't open %s for reading\n", progname, |
| argv[file_index]); |
| return EXIT_FAILURE; |
| } |
| } else { |
| /* default input file is stdin */ |
| fp = read_stdin(); |
| } |
| |
| if (icc_filename != NULL) { |
| if ((icc_file = fopen(icc_filename, READ_BINARY)) == NULL) { |
| fprintf(stderr, "%s: can't open %s\n", progname, icc_filename); |
| return EXIT_FAILURE; |
| } |
| if (fseek(icc_file, 0, SEEK_END) < 0 || |
| (icc_len = ftell(icc_file)) < 1 || |
| fseek(icc_file, 0, SEEK_SET) < 0) { |
| fprintf(stderr, "%s: can't determine size of %s\n", progname, |
| icc_filename); |
| return EXIT_FAILURE; |
| } |
| if ((icc_profile = (JOCTET *)malloc(icc_len)) == NULL) { |
| fprintf(stderr, "%s: can't allocate memory for ICC profile\n", progname); |
| fclose(icc_file); |
| return EXIT_FAILURE; |
| } |
| if (fread(icc_profile, icc_len, 1, icc_file) < 1) { |
| fprintf(stderr, "%s: can't read ICC profile from %s\n", progname, |
| icc_filename); |
| free(icc_profile); |
| fclose(icc_file); |
| return EXIT_FAILURE; |
| } |
| fclose(icc_file); |
| if (copyoption == JCOPYOPT_ALL) |
| copyoption = JCOPYOPT_ALL_EXCEPT_ICC; |
| if (copyoption == JCOPYOPT_ICC) |
| copyoption = JCOPYOPT_NONE; |
| } |
| |
| if (report) { |
| start_progress_monitor((j_common_ptr)&dstinfo, &dst_progress); |
| dst_progress.report = report; |
| } |
| if (report || max_scans != 0) { |
| start_progress_monitor((j_common_ptr)&srcinfo, &src_progress); |
| src_progress.report = report; |
| src_progress.max_scans = max_scans; |
| } |
| #if TRANSFORMS_SUPPORTED |
| /* Open the drop file. */ |
| if (dropfilename != NULL) { |
| if ((drop_file = fopen(dropfilename, READ_BINARY)) == NULL) { |
| fprintf(stderr, "%s: can't open %s for reading\n", progname, |
| dropfilename); |
| return EXIT_FAILURE; |
| } |
| dropinfo.err = jpeg_std_error(&jdroperr); |
| jpeg_create_decompress(&dropinfo); |
| jpeg_stdio_src(&dropinfo, drop_file); |
| } else { |
| drop_file = NULL; |
| } |
| #endif |
| |
| /* Specify data source for decompression */ |
| jpeg_stdio_src(&srcinfo, fp); |
| |
| /* Enable saving of extra markers that we want to copy */ |
| jcopy_markers_setup(&srcinfo, copyoption); |
| |
| /* Read file header */ |
| (void)jpeg_read_header(&srcinfo, TRUE); |
| |
| #if TRANSFORMS_SUPPORTED |
| if (dropfilename != NULL) { |
| (void)jpeg_read_header(&dropinfo, TRUE); |
| transformoption.crop_width = dropinfo.image_width; |
| transformoption.crop_width_set = JCROP_POS; |
| transformoption.crop_height = dropinfo.image_height; |
| transformoption.crop_height_set = JCROP_POS; |
| transformoption.drop_ptr = &dropinfo; |
| } |
| #endif |
| |
| /* Any space needed by a transform option must be requested before |
| * jpeg_read_coefficients so that memory allocation will be done right. |
| */ |
| #if TRANSFORMS_SUPPORTED |
| /* Fail right away if -perfect is given and transformation is not perfect. |
| */ |
| if (!jtransform_request_workspace(&srcinfo, &transformoption)) { |
| fprintf(stderr, "%s: transformation is not perfect\n", progname); |
| return EXIT_FAILURE; |
| } |
| #endif |
| |
| /* Read source file as DCT coefficients */ |
| src_coef_arrays = jpeg_read_coefficients(&srcinfo); |
| |
| #if TRANSFORMS_SUPPORTED |
| if (dropfilename != NULL) { |
| transformoption.drop_coef_arrays = jpeg_read_coefficients(&dropinfo); |
| } |
| #endif |
| |
| /* Initialize destination compression parameters from source values */ |
| jpeg_copy_critical_parameters(&srcinfo, &dstinfo); |
| |
| /* Adjust destination parameters if required by transform options; |
| * also find out which set of coefficient arrays will hold the output. |
| */ |
| #if TRANSFORMS_SUPPORTED |
| dst_coef_arrays = jtransform_adjust_parameters(&srcinfo, &dstinfo, |
| src_coef_arrays, |
| &transformoption); |
| #else |
| dst_coef_arrays = src_coef_arrays; |
| #endif |
| |
| /* Close input file, if we opened it. |
| * Note: we assume that jpeg_read_coefficients consumed all input |
| * until JPEG_REACHED_EOI, and that jpeg_finish_decompress will |
| * only consume more while (!cinfo->inputctl->eoi_reached). |
| * We cannot call jpeg_finish_decompress here since we still need the |
| * virtual arrays allocated from the source object for processing. |
| */ |
| if (fp != stdin) |
| fclose(fp); |
| |
| /* Open the output file. */ |
| if (outfilename != NULL) { |
| if ((fp = fopen(outfilename, WRITE_BINARY)) == NULL) { |
| fprintf(stderr, "%s: can't open %s for writing\n", progname, |
| outfilename); |
| return EXIT_FAILURE; |
| } |
| } else { |
| /* default output file is stdout */ |
| fp = write_stdout(); |
| } |
| |
| /* Adjust default compression parameters by re-parsing the options */ |
| file_index = parse_switches(&dstinfo, argc, argv, 0, TRUE); |
| |
| /* Specify data destination for compression */ |
| jpeg_stdio_dest(&dstinfo, fp); |
| |
| /* Start compressor (note no image data is actually written here) */ |
| jpeg_write_coefficients(&dstinfo, dst_coef_arrays); |
| |
| /* Copy to the output file any extra markers that we want to preserve */ |
| jcopy_markers_execute(&srcinfo, &dstinfo, copyoption); |
| |
| if (icc_profile != NULL) |
| jpeg_write_icc_profile(&dstinfo, icc_profile, (unsigned int)icc_len); |
| |
| /* Execute image transformation, if any */ |
| #if TRANSFORMS_SUPPORTED |
| jtransform_execute_transformation(&srcinfo, &dstinfo, src_coef_arrays, |
| &transformoption); |
| #endif |
| |
| /* Finish compression and release memory */ |
| jpeg_finish_compress(&dstinfo); |
| jpeg_destroy_compress(&dstinfo); |
| #if TRANSFORMS_SUPPORTED |
| if (dropfilename != NULL) { |
| (void)jpeg_finish_decompress(&dropinfo); |
| jpeg_destroy_decompress(&dropinfo); |
| } |
| #endif |
| (void)jpeg_finish_decompress(&srcinfo); |
| jpeg_destroy_decompress(&srcinfo); |
| |
| /* Close output file, if we opened it */ |
| if (fp != stdout) |
| fclose(fp); |
| #if TRANSFORMS_SUPPORTED |
| if (drop_file != NULL) |
| fclose(drop_file); |
| #endif |
| |
| if (report) |
| end_progress_monitor((j_common_ptr)&dstinfo); |
| if (report || max_scans != 0) |
| end_progress_monitor((j_common_ptr)&srcinfo); |
| |
| free(icc_profile); |
| |
| /* All done. */ |
| #if TRANSFORMS_SUPPORTED |
| if (dropfilename != NULL) |
| return (jsrcerr.num_warnings + jdroperr.num_warnings + |
| jdsterr.num_warnings ? EXIT_WARNING : EXIT_SUCCESS); |
| #endif |
| return (jsrcerr.num_warnings + jdsterr.num_warnings ? |
| EXIT_WARNING : EXIT_SUCCESS); |
| } |
