patches

It is possible that certain products which can be built using this software modules might form inve

1. Just copy all the files into the IJG source directory.
   The changes in detail:


'jcinit.c', function 'jinit_compress_master()':
'jctrans.c', function 'transencode_master_selection()':

  if (cinfo->arith_code)
    jinit_arith_encoder(cinfo);

  instead of ERREXIT(cinfo, JERR_ARITH_NOTIMPL).

  Note that the ERREXIT will be executed in the corresponding
  placeholder file.
  Thus, actual library support for arithmetic coding is solely
  enabled/disabled by selecting the appropriate source file,
  NOT by the support macros in 'jmorecfg.h' (which would be
  duplicated effort).
  The support macros in 'jmorecfg.h' enable/disable the support
  on application level, however.


'jdmaster.c'
'jdtrans.c'

  Similar patch for the decoder.


'jcmarker.c', function 'write_frame_header()'

  /* Emit the proper SOF marker */
  if (cinfo->arith_code) {
    if (cinfo->progressive_mode)
      emit_sof(cinfo, M_SOF10);	/* SOF code for progressive arithmetic */
    else
      emit_sof(cinfo, M_SOF9);	/* SOF code for sequential arithmetic */
  }

  Select proper progressive/sequential marker also for arithmetic coding!


'jcmaster.c', function 'jinit_c_master_control()'

  if (cinfo->progressive_mode && cinfo->arith_code == 0)
  /* TEMPORARY HACK ??? */
  /* GV: indeed ;-) */
    cinfo->optimize_coding = TRUE;
    /* assume default tables no good for progressive mode */
    /* GV: but only in Huffman case! */

  function 'prepare_for_pass()'

    if (cinfo->Ss != 0 || cinfo->Ah == 0) {
      (*cinfo->entropy->start_pass) (cinfo, TRUE);
      (*cinfo->coef->start_pass) (cinfo, JBUF_CRANK_DEST);
      master->pub.call_pass_startup = FALSE;
      break;
    }

    Removed cinfo->arith_code check here.


'jerror.h'

  JMESSAGE(JERR_NO_ARITH_TABLE, "Arithmetic table 0x%02x was not defined")
  JMESSAGE(JWRN_ARITH_BAD_CODE, "Corrupt JPEG data: bad arithmetic code")

  added.


'jpegint.h'

  Prototypes for jinit_arith_encoder() and jinit_arith_decoder() added.


2. A new 'makefile.cfg' is included for automatic update of your makefile
   by using './configure' before 'make'.
   If you are not using a configure-generated makefile, apply the
   corresponding changes to your specific Makefile/Projectfile
   for the inclusion of the 3 new placeholder files:

In 'LIBSOURCES' add 'jaricom.c', 'jcarith.c', and 'jdarith.c'.
In 'COMOBJECTS' add 'jaricom.$(O)'.
In 'CLIBOBJECTS' add 'jcarith.$(O)'.
In 'DLIBOBJECTS' add 'jdarith.$(O)'.
In the dependencies section add
jcarith.$(O): jcarith.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
jdarith.$(O): jdarith.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
jaricom.$(O): jaricom.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h