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-rw-r--r--djpeg.c126
1 files changed, 86 insertions, 40 deletions
diff --git a/djpeg.c b/djpeg.c
index 2489ccc..cc2eb9d 100644
--- a/djpeg.c
+++ b/djpeg.c
@@ -3,9 +3,9 @@
*
* This file was part of the Independent JPEG Group's software:
* Copyright (C) 1991-1997, Thomas G. Lane.
- * Modified 2013 by Guido Vollbeding.
+ * Modified 2013-2019 by Guido Vollbeding.
* libjpeg-turbo Modifications:
- * Copyright (C) 2010-2011, 2013-2017, D. R. Commander.
+ * Copyright (C) 2010-2011, 2013-2017, 2019-2020, D. R. Commander.
* Copyright (C) 2015, Google, Inc.
* For conditions of distribution and use, see the accompanying README.ijg
* file.
@@ -68,10 +68,10 @@ static const char * const cdjpeg_message_table[] = {
typedef enum {
FMT_BMP, /* BMP format (Windows flavor) */
- FMT_GIF, /* GIF format */
+ FMT_GIF, /* GIF format (LZW-compressed) */
+ FMT_GIF0, /* GIF format (uncompressed) */
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;
@@ -94,11 +94,14 @@ static IMAGE_FORMATS requested_fmt;
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 */
-boolean memsrc; /* for -memsrc switch */
+static boolean memsrc; /* for -memsrc switch */
+static boolean report; /* for -report switch */
boolean skip, crop;
JDIMENSION skip_start, skip_end;
JDIMENSION crop_x, crop_y, crop_width, crop_height;
+static boolean strict; /* for -strict switch */
#define INPUT_BUF_SIZE 4096
@@ -127,8 +130,10 @@ usage(void)
(DEFAULT_FMT == FMT_BMP ? " (default)" : ""));
#endif
#ifdef GIF_SUPPORTED
- fprintf(stderr, " -gif Select GIF output format%s\n",
+ fprintf(stderr, " -gif Select GIF output format (LZW-compressed)%s\n",
(DEFAULT_FMT == FMT_GIF ? " (default)" : ""));
+ fprintf(stderr, " -gif0 Select GIF output format (uncompressed)%s\n",
+ (DEFAULT_FMT == FMT_GIF0 ? " (default)" : ""));
#endif
#ifdef BMP_SUPPORTED
fprintf(stderr, " -os2 Select BMP output format (OS/2 style)%s\n",
@@ -138,25 +143,21 @@ usage(void)
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",
+ fprintf(stderr, " -dct int Use accurate 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",
+ fprintf(stderr, " -dct fast Use less accurate integer DCT method [legacy feature]%s\n",
(JDCT_DEFAULT == JDCT_IFAST ? " (default)" : ""));
#endif
#ifdef DCT_FLOAT_SUPPORTED
- fprintf(stderr, " -dct float Use floating-point DCT method%s\n",
+ fprintf(stderr, " -dct float Use floating-point DCT method [legacy feature]%s\n",
(JDCT_DEFAULT == JDCT_FLOAT ? " (default)" : ""));
#endif
fprintf(stderr, " -dither fs Use F-S dithering (default)\n");
@@ -171,14 +172,16 @@ usage(void)
fprintf(stderr, " -onepass Use 1-pass quantization (fast, low quality)\n");
#endif
fprintf(stderr, " -maxmemory N Maximum memory to use (in kbytes)\n");
+ fprintf(stderr, " -maxscans N Maximum number of scans to allow in input file\n");
fprintf(stderr, " -outfile name Specify name for output file\n");
#if JPEG_LIB_VERSION >= 80 || defined(MEM_SRCDST_SUPPORTED)
fprintf(stderr, " -memsrc Load input file into memory before decompressing\n");
#endif
-
+ fprintf(stderr, " -report Report decompression progress\n");
fprintf(stderr, " -skip Y0,Y1 Decompress all rows except those between Y0 and Y1 (inclusive)\n");
fprintf(stderr, " -crop WxH+X+Y Decompress only a rectangular subregion of the image\n");
fprintf(stderr, " [requires PBMPLUS (PPM/PGM), GIF, or Targa output format]\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");
exit(EXIT_FAILURE);
@@ -203,10 +206,13 @@ parse_switches(j_decompress_ptr cinfo, int argc, char **argv,
/* Set up default JPEG parameters. */
requested_fmt = DEFAULT_FMT; /* set default output file format */
icc_filename = NULL;
+ max_scans = 0;
outfilename = NULL;
memsrc = FALSE;
+ report = FALSE;
skip = FALSE;
crop = FALSE;
+ strict = FALSE;
cinfo->err->trace_level = 0;
/* Scan command line options, adjust parameters */
@@ -224,7 +230,7 @@ parse_switches(j_decompress_ptr cinfo, int argc, char **argv,
arg++; /* advance past switch marker character */
if (keymatch(arg, "bmp", 1)) {
- /* BMP output format. */
+ /* BMP output format (Windows flavor). */
requested_fmt = FMT_BMP;
} else if (keymatch(arg, "colors", 1) || keymatch(arg, "colours", 1) ||
@@ -295,9 +301,13 @@ parse_switches(j_decompress_ptr cinfo, int argc, char **argv,
cinfo->do_fancy_upsampling = FALSE;
} else if (keymatch(arg, "gif", 1)) {
- /* GIF output format. */
+ /* GIF output format (LZW-compressed). */
requested_fmt = FMT_GIF;
+ } else if (keymatch(arg, "gif0", 4)) {
+ /* GIF output format (uncompressed). */
+ requested_fmt = FMT_GIF0;
+
} else if (keymatch(arg, "grayscale", 2) ||
keymatch(arg, "greyscale", 2)) {
/* Force monochrome output. */
@@ -351,6 +361,12 @@ parse_switches(j_decompress_ptr cinfo, int argc, char **argv,
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, "nosmooth", 3)) {
/* Suppress fancy upsampling */
cinfo->do_fancy_upsampling = FALSE;
@@ -383,9 +399,8 @@ parse_switches(j_decompress_ptr cinfo, int argc, char **argv,
/* 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, "report", 2)) {
+ report = TRUE;
} else if (keymatch(arg, "scale", 2)) {
/* Scale the output image by a fraction M/N. */
@@ -413,6 +428,9 @@ parse_switches(j_decompress_ptr cinfo, int argc, char **argv,
usage();
crop = TRUE;
+ } else if (keymatch(arg, "strict", 2)) {
+ strict = TRUE;
+
} else if (keymatch(arg, "targa", 1)) {
/* Targa output format. */
requested_fmt = FMT_TARGA;
@@ -444,7 +462,7 @@ jpeg_getc(j_decompress_ptr cinfo)
ERREXIT(cinfo, JERR_CANT_SUSPEND);
}
datasrc->bytes_in_buffer--;
- return GETJOCTET(*datasrc->next_input_byte++);
+ return *datasrc->next_input_byte++;
}
@@ -499,6 +517,19 @@ print_text_marker(j_decompress_ptr cinfo)
}
+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.
*/
@@ -512,9 +543,7 @@ main(int argc, char **argv)
{
struct jpeg_decompress_struct cinfo;
struct jpeg_error_mgr jerr;
-#ifdef PROGRESS_REPORT
struct cdjpeg_progress_mgr progress;
-#endif
int file_index;
djpeg_dest_ptr dest_mgr = NULL;
FILE *input_file;
@@ -561,6 +590,9 @@ main(int argc, char **argv)
file_index = parse_switches(&cinfo, argc, argv, 0, FALSE);
+ if (strict)
+ jerr.emit_message = my_emit_message;
+
#ifdef TWO_FILE_COMMANDLINE
/* Must have either -outfile switch or explicit output file name */
if (outfilename == NULL) {
@@ -607,9 +639,11 @@ main(int argc, char **argv)
output_file = write_stdout();
}
-#ifdef PROGRESS_REPORT
- start_progress_monitor((j_common_ptr)&cinfo, &progress);
-#endif
+ if (report || max_scans != 0) {
+ start_progress_monitor((j_common_ptr)&cinfo, &progress);
+ progress.report = report;
+ progress.max_scans = max_scans;
+ }
/* Specify data source for decompression */
#if JPEG_LIB_VERSION >= 80 || defined(MEM_SRCDST_SUPPORTED)
@@ -657,7 +691,10 @@ main(int argc, char **argv)
#endif
#ifdef GIF_SUPPORTED
case FMT_GIF:
- dest_mgr = jinit_write_gif(&cinfo);
+ dest_mgr = jinit_write_gif(&cinfo, TRUE);
+ break;
+ case FMT_GIF0:
+ dest_mgr = jinit_write_gif(&cinfo, FALSE);
break;
#endif
#ifdef PPM_SUPPORTED
@@ -665,11 +702,6 @@ main(int argc, char **argv)
dest_mgr = jinit_write_ppm(&cinfo);
break;
#endif
-#ifdef RLE_SUPPORTED
- case FMT_RLE:
- dest_mgr = jinit_write_rle(&cinfo);
- break;
-#endif
#ifdef TARGA_SUPPORTED
case FMT_TARGA:
dest_mgr = jinit_write_targa(&cinfo);
@@ -712,7 +744,12 @@ main(int argc, char **argv)
dest_mgr->buffer_height);
(*dest_mgr->put_pixel_rows) (&cinfo, dest_mgr, num_scanlines);
}
- jpeg_skip_scanlines(&cinfo, skip_end - skip_start + 1);
+ if ((tmp = jpeg_skip_scanlines(&cinfo, skip_end - skip_start + 1)) !=
+ skip_end - skip_start + 1) {
+ fprintf(stderr, "%s: jpeg_skip_scanlines() returned %d rather than %d\n",
+ progname, tmp, skip_end - skip_start + 1);
+ return EXIT_FAILURE;
+ }
while (cinfo.output_scanline < cinfo.output_height) {
num_scanlines = jpeg_read_scanlines(&cinfo, dest_mgr->buffer,
dest_mgr->buffer_height);
@@ -748,13 +785,24 @@ main(int argc, char **argv)
cinfo.output_height = tmp;
/* Process data */
- jpeg_skip_scanlines(&cinfo, crop_y);
+ if ((tmp = jpeg_skip_scanlines(&cinfo, crop_y)) != crop_y) {
+ fprintf(stderr, "%s: jpeg_skip_scanlines() returned %d rather than %d\n",
+ progname, tmp, crop_y);
+ return EXIT_FAILURE;
+ }
while (cinfo.output_scanline < crop_y + crop_height) {
num_scanlines = jpeg_read_scanlines(&cinfo, dest_mgr->buffer,
dest_mgr->buffer_height);
(*dest_mgr->put_pixel_rows) (&cinfo, dest_mgr, num_scanlines);
}
- jpeg_skip_scanlines(&cinfo, cinfo.output_height - crop_y - crop_height);
+ if ((tmp =
+ jpeg_skip_scanlines(&cinfo,
+ cinfo.output_height - crop_y - crop_height)) !=
+ cinfo.output_height - crop_y - crop_height) {
+ fprintf(stderr, "%s: jpeg_skip_scanlines() returned %d rather than %d\n",
+ progname, tmp, cinfo.output_height - crop_y - crop_height);
+ return EXIT_FAILURE;
+ }
/* Normal full-image decompress */
} else {
@@ -769,12 +817,11 @@ main(int argc, char **argv)
}
}
-#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
+ if (report || max_scans != 0)
+ progress.pub.completed_passes = progress.pub.total_passes;
if (icc_filename != NULL) {
FILE *icc_file;
@@ -813,9 +860,8 @@ main(int argc, char **argv)
if (output_file != stdout)
fclose(output_file);
-#ifdef PROGRESS_REPORT
- end_progress_monitor((j_common_ptr)&cinfo);
-#endif
+ if (report || max_scans != 0)
+ end_progress_monitor((j_common_ptr)&cinfo);
if (memsrc)
free(inbuffer);
generated by cgit v1.2.3 (git 2.25.1) at 2025-10-03 05:07:58 +0000