added new Vollbeding files, updated ChangeLog

6 files changed, 409 insertions, 1 deletions

diff --git a/ChangeLog b/ChangeLog
index bf47aff..effc85a 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,22 @@
+2006-02-25  Paul van den Berg  <paulberg@wanadoo.nl>
+
+	* created branch jpeg6b_vollbeding
+
+	* added jpegclub.org/jpegexiforient.c and a modified 
+	version of jpegclub.org/exifautotran.txt as exifautotran.sh
+
+	* applied changes to jpeg6b_original
+
+	* removed changed testimages
+
+	* replaced jaricom.c, jcarith.c, and jdarith.c with dummies 
+	from sylvana.net/jpeg-ari/jpeg-ari-28mar98.tar.gz
+
+	* removed dos-isms, Makefile and jconfig.h
+
+	* Got latest source from jpegclub.org/libjpeg-6c.tar.gz
+	
+
 2006-02-15  Frank Warmerdam  <warmerdam@pobox.com>
 
 	* Introduced ChangeLog file.
@@ -8,4 +27,3 @@
 
 	* Committed jpeb6b from the ijg download site as the baseline.  Tagged
 	it as jpeg6b_original.
-
diff --git a/exifautotran.sh b/exifautotran.sh
new file mode 100755
index 0000000..fd5105e
--- /dev/null
+++ b/exifautotran.sh
@@ -0,0 +1,41 @@
+#!/bin/sh
+# exifautotran [list of files]
+#
+# Transforms Exif files so that Orientation becomes 1
+#
+for i
+do
+ case $i in
+ -v|--version) echo "exifautotran"; exit 0;;
+ -h|--help) 
+             cat <<EOF
+exifautotran [list of files]
+
+Transforms Exif files so that Orientation becomes 1
+EOF
+             exit 0;;
+ esac
+
+ case `jpegexiforient -n "$i"` in
+ 1) transform="";;
+ 2) transform="-flip horizontal";;
+ 3) transform="-rotate 180";;
+ 4) transform="-flip vertical";;
+ 5) transform="-transpose";;
+ 6) transform="-rotate 90";;
+ 7) transform="-transverse";;
+ 8) transform="-rotate 270";;
+ *) transform="";;
+ esac
+ if test -n "$transform"; then
+  echo Executing: jpegtran -copy all $transform $i >&2
+  jpegtran -copy all $transform "$i" > tempfile
+  if test $? -ne 0; then
+   echo Error while transforming $i - skipped. >&2
+  else
+   rm "$i"
+   mv tempfile "$i"
+   jpegexiforient -1 "$i" > /dev/null
+  fi
+ fi
+done
diff --git a/jaricom.c b/jaricom.c
new file mode 100644
index 0000000..1a15bdf
--- /dev/null
+++ b/jaricom.c
@@ -0,0 +1,13 @@
+/*
+ * jaricom.c
+ *
+ * [IJG Copyright notice]
+ *
+ * This file holds place for arithmetic entropy codec tables.
+ */
+
+#define JPEG_INTERNALS
+#include "jinclude.h"
+#include "jpeglib.h"
+
+INT32 jaritab[1];	/* dummy table */
diff --git a/jcarith.c b/jcarith.c
new file mode 100644
index 0000000..e9790a3
--- /dev/null
+++ b/jcarith.c
@@ -0,0 +1,22 @@
+/*
+ * jcarith.c
+ *
+ * [IJG Copyright notice]
+ *
+ * This file holds place for arithmetic entropy encoding routines.
+ */
+
+#define JPEG_INTERNALS
+#include "jinclude.h"
+#include "jpeglib.h"
+
+
+/*
+ * Module initialization routine for arithmetic entropy encoding.
+ */
+
+GLOBAL(void)
+jinit_arith_encoder (j_compress_ptr cinfo)
+{
+  ERREXIT(cinfo, JERR_ARITH_NOTIMPL);
+}
diff --git a/jdarith.c b/jdarith.c
new file mode 100644
index 0000000..13709f2
--- /dev/null
+++ b/jdarith.c
@@ -0,0 +1,22 @@
+/*
+ * jdarith.c
+ *
+ * [IJG Copyright notice]
+ *
+ * This file holds place for arithmetic entropy decoding routines.
+ */
+
+#define JPEG_INTERNALS
+#include "jinclude.h"
+#include "jpeglib.h"
+
+
+/*
+ * Module initialization routine for arithmetic entropy decoding.
+ */
+
+GLOBAL(void)
+jinit_arith_decoder (j_decompress_ptr cinfo)
+{
+  ERREXIT(cinfo, JERR_ARITH_NOTIMPL);
+}
diff --git a/jpegexiforient.c b/jpegexiforient.c
new file mode 100644
index 0000000..ac17d7d
--- /dev/null
+++ b/jpegexiforient.c
@@ -0,0 +1,292 @@
+/*
+ * jpegexiforient.c
+ *
+ * This is a utility program to get and set the Exif Orientation Tag.
+ * It can be used together with jpegtran in scripts for automatic
+ * orientation correction of digital camera pictures.
+ *
+ * The Exif orientation value gives the orientation of the camera
+ * relative to the scene when the image was captured.  The relation
+ * of the '0th row' and '0th column' to visual position is shown as
+ * below.
+ *
+ * Value | 0th Row     | 0th Column
+ * ------+-------------+-----------
+ *   1   | top         | left side
+ *   2   | top         | rigth side
+ *   3   | bottom      | rigth side
+ *   4   | bottom      | left side
+ *   5   | left side   | top
+ *   6   | right side  | top
+ *   7   | right side  | bottom
+ *   8   | left side   | bottom
+ *
+ * For convenience, here is what the letter F would look like if it were
+ * tagged correctly and displayed by a program that ignores the orientation
+ * tag:
+ *
+ *   1        2       3      4         5            6           7          8
+ *
+ * 888888  888888      88  88      8888888888  88                  88  8888888888
+ * 88          88      88  88      88  88      88  88          88  88      88  88
+ * 8888      8888    8888  8888    88          8888888888  8888888888          88
+ * 88          88      88  88
+ * 88          88  888888  888888
+ *
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+
+static FILE * myfile;		/* My JPEG file */
+
+static unsigned char exif_data[65536L];
+
+/* Return next input byte, or EOF if no more */
+#define NEXTBYTE()  getc(myfile)
+
+/* Error exit handler */
+#define ERREXIT(msg)  (exit(0))
+
+/* Read one byte, testing for EOF */
+static int
+read_1_byte (void)
+{
+  int c;
+
+  c = NEXTBYTE();
+  if (c == EOF)
+    ERREXIT("Premature EOF in JPEG file");
+  return c;
+}
+
+/* Read 2 bytes, convert to unsigned int */
+/* All 2-byte quantities in JPEG markers are MSB first */
+static unsigned int
+read_2_bytes (void)
+{
+  int c1, c2;
+
+  c1 = NEXTBYTE();
+  if (c1 == EOF)
+    ERREXIT("Premature EOF in JPEG file");
+  c2 = NEXTBYTE();
+  if (c2 == EOF)
+    ERREXIT("Premature EOF in JPEG file");
+  return (((unsigned int) c1) << 8) + ((unsigned int) c2);
+}
+
+static const char * progname;	/* program name for error messages */
+
+static void
+usage (void)
+/* complain about bad command line */
+{
+  fprintf(stderr, "jpegexiforient reads or writes the Exif Orientation Tag ");
+  fprintf(stderr, "in a JPEG Exif file.\n");
+
+  fprintf(stderr, "Usage: %s [switches] jpegfile\n", progname);
+
+  fprintf(stderr, "Switches:\n");
+  fprintf(stderr, "  -n         Do not output the trailing newline\n");
+  fprintf(stderr, "  -1 .. -8   Set orientation value 1 .. 8\n");
+}
+
+/*
+ * The main program.
+ */
+
+int
+main (int argc, char **argv)
+{
+  int n_flag, set_flag;
+  unsigned int length, i;
+  int is_motorola; /* Flag for byte order */
+  unsigned int offset, number_of_tags, tagnum;
+
+  progname = argv[0];
+  if (progname == NULL || progname[0] == 0)
+    progname = "jpegexiforient";	/* in case C library doesn't provide it */
+
+  if (argc < 2) { usage(); return 0; }
+
+  n_flag = 0; set_flag = 0;
+
+  i = 1;
+  while (argv[i][0] == '-') {
+    switch (argv[i][1]) {
+    case 'n':
+      n_flag = 1;
+      break;
+    case '1':
+    case '2':
+    case '3':
+    case '4':
+    case '5':
+    case '6':
+    case '7':
+    case '8':
+      set_flag = argv[i][1] - '0';
+      break;
+    default:
+      usage(); return 0;
+    }
+    if (++i >= argc) { usage(); return 0; }
+  }
+
+  if (set_flag) {
+    if ((myfile = fopen(argv[i], "rb+")) == NULL) {
+      fprintf(stderr, "%s: can't open %s\n", progname, argv[i]);
+      return 0;
+    }
+  } else {
+    if ((myfile = fopen(argv[i], "rb")) == NULL) {
+      fprintf(stderr, "%s: can't open %s\n", progname, argv[i]);
+      return 0;
+    }
+  }
+
+  /* Read File head, check for JPEG SOI + Exif APP1 */
+  for (i = 0; i < 4; i++)
+    exif_data[i] = (unsigned char) read_1_byte();
+  if (exif_data[0] != 0xFF ||
+      exif_data[1] != 0xD8 ||
+      exif_data[2] != 0xFF ||
+      exif_data[3] != 0xE1)
+    return 0;
+
+  /* Get the marker parameter length count */
+  length = read_2_bytes();
+  /* Length includes itself, so must be at least 2 */
+  /* Following Exif data length must be at least 6 */
+  if (length < 8)
+    return 0;
+  length -= 8;
+  /* Read Exif head, check for "Exif" */
+  for (i = 0; i < 6; i++)
+    exif_data[i] = (unsigned char) read_1_byte();
+  if (exif_data[0] != 0x45 ||
+      exif_data[1] != 0x78 ||
+      exif_data[2] != 0x69 ||
+      exif_data[3] != 0x66 ||
+      exif_data[4] != 0 ||
+      exif_data[5] != 0)
+    return 0;
+  /* Read Exif body */
+  for (i = 0; i < length; i++)
+    exif_data[i] = (unsigned char) read_1_byte();
+
+  if (length < 12) return 0; /* Length of an IFD entry */
+
+  /* Discover byte order */
+  if (exif_data[0] == 0x49 && exif_data[1] == 0x49)
+    is_motorola = 0;
+  else if (exif_data[0] == 0x4D && exif_data[1] == 0x4D)
+    is_motorola = 1;
+  else
+    return 0;
+
+  /* Check Tag Mark */
+  if (is_motorola) {
+    if (exif_data[2] != 0) return 0;
+    if (exif_data[3] != 0x2A) return 0;
+  } else {
+    if (exif_data[3] != 0) return 0;
+    if (exif_data[2] != 0x2A) return 0;
+  }
+
+  /* Get first IFD offset (offset to IFD0) */
+  if (is_motorola) {
+    if (exif_data[4] != 0) return 0;
+    if (exif_data[5] != 0) return 0;
+    offset = exif_data[6];
+    offset <<= 8;
+    offset += exif_data[7];
+  } else {
+    if (exif_data[7] != 0) return 0;
+    if (exif_data[6] != 0) return 0;
+    offset = exif_data[5];
+    offset <<= 8;
+    offset += exif_data[4];
+  }
+  if (offset > length - 2) return 0; /* check end of data segment */
+
+  /* Get the number of directory entries contained in this IFD */
+  if (is_motorola) {
+    number_of_tags = exif_data[offset];
+    number_of_tags <<= 8;
+    number_of_tags += exif_data[offset+1];
+  } else {
+    number_of_tags = exif_data[offset+1];
+    number_of_tags <<= 8;
+    number_of_tags += exif_data[offset];
+  }
+  if (number_of_tags == 0) return 0;
+  offset += 2;
+
+  /* Search for Orientation Tag in IFD0 */
+  for (;;) {
+    if (offset > length - 12) return 0; /* check end of data segment */
+    /* Get Tag number */
+    if (is_motorola) {
+      tagnum = exif_data[offset];
+      tagnum <<= 8;
+      tagnum += exif_data[offset+1];
+    } else {
+      tagnum = exif_data[offset+1];
+      tagnum <<= 8;
+      tagnum += exif_data[offset];
+    }
+    if (tagnum == 0x0112) break; /* found Orientation Tag */
+    if (--number_of_tags == 0) return 0;
+    offset += 12;
+  }
+
+  if (set_flag) {
+    /* Set the Orientation value */
+    if (is_motorola) {
+      exif_data[offset+2] = 0; /* Format = unsigned short (2 octets) */
+      exif_data[offset+3] = 3;
+      exif_data[offset+4] = 0; /* Number Of Components = 1 */
+      exif_data[offset+5] = 0;
+      exif_data[offset+6] = 0;
+      exif_data[offset+7] = 1;
+      exif_data[offset+8] = 0;
+      exif_data[offset+9] = (unsigned char)set_flag;
+      exif_data[offset+10] = 0;
+      exif_data[offset+11] = 0;
+    } else {
+      exif_data[offset+2] = 3; /* Format = unsigned short (2 octets) */
+      exif_data[offset+3] = 0;
+      exif_data[offset+4] = 1; /* Number Of Components = 1 */
+      exif_data[offset+5] = 0;
+      exif_data[offset+6] = 0;
+      exif_data[offset+7] = 0;
+      exif_data[offset+8] = (unsigned char)set_flag;
+      exif_data[offset+9] = 0;
+      exif_data[offset+10] = 0;
+      exif_data[offset+11] = 0;
+    }
+    fseek(myfile, (4 + 2 + 6 + 2) + offset, SEEK_SET);
+    fwrite(exif_data + 2 + offset, 1, 10, myfile);
+  } else {
+    /* Get the Orientation value */
+    if (is_motorola) {
+      if (exif_data[offset+8] != 0) return 0;
+      set_flag = exif_data[offset+9];
+    } else {
+      if (exif_data[offset+9] != 0) return 0;
+      set_flag = exif_data[offset+8];
+    }
+    if (set_flag > 8) return 0;
+  }
+
+  /* Write out Orientation value */
+  if (n_flag)
+    printf("%c", '0' + set_flag);
+  else
+    printf("%c\n", '0' + set_flag);
+
+  /* All done. */
+  return 0;
+}