X-Git-Url: https://git.creatis.insa-lyon.fr/pubgit/?a=blobdiff_plain;f=src%2Fjpeg%2Flibijg%2Fjcmarker.c;h=fc388d579b44f0cb43cfb3cecf58558067713d4a;hb=c4220b95e9d5e902a7468e408435bf6dea4950eb;hp=6f089d573cffec3c84319f7acd19e3bdebc5bbb5;hpb=8c2e140c99ed3c497ddb53ec9fbf2708c3a1b341;p=gdcm.git

diff --git a/src/jpeg/libijg/jcmarker.c b/src/jpeg/libijg/jcmarker.c
index 6f089d57..fc388d57 100644
--- a/src/jpeg/libijg/jcmarker.c
+++ b/src/jpeg/libijg/jcmarker.c
@@ -257,8 +257,9 @@ emit_dac (j_compress_ptr cinfo)
       emit_byte(cinfo, cinfo->arith_ac_K[i]);
     }
   }
+#else
+  (void)cinfo;
 #endif /* C_ARITH_CODING_SUPPORTED */
-  cinfo = 0;
 }
 
 
@@ -323,7 +324,7 @@ emit_sos (j_compress_ptr cinfo)
     emit_byte(cinfo, compptr->component_id);
     td = compptr->dc_tbl_no;
     ta = compptr->ac_tbl_no;
-    if (cinfo->progressive_mode) {
+    if (cinfo->process == JPROC_PROGRESSIVE) {
       /* Progressive mode: only DC or only AC tables are used in one scan;
        * furthermore, Huffman coding of DC refinement uses no table at all.
        * We emit 0 for unused field(s); this is recommended by the P&M text
@@ -497,21 +498,23 @@ write_frame_header (j_compress_ptr cinfo)
   int ci, prec;
   boolean is_baseline;
   jpeg_component_info *compptr;
-  
-  /* Emit DQT for each quantization table.
-   * Note that emit_dqt() suppresses any duplicate tables.
-   */
+
   prec = 0;
-  for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
-       ci++, compptr++) {
-    prec += emit_dqt(cinfo, compptr->quant_tbl_no);
+  if (cinfo->process != JPROC_LOSSLESS) {
+    /* Emit DQT for each quantization table.
+     * Note that emit_dqt() suppresses any duplicate tables.
+     */
+    for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
+   ci++, compptr++) {
+      prec += emit_dqt(cinfo, compptr->quant_tbl_no);
+    }
+    /* now prec is nonzero iff there are any 16-bit quant tables. */
   }
-  /* now prec is nonzero iff there are any 16-bit quant tables. */
 
   /* Check for a non-baseline specification.
    * Note we assume that Huffman table numbers won't be changed later.
    */
-  if (cinfo->arith_code || cinfo->progressive_mode ||
+  if (cinfo->arith_code || cinfo->process != JPROC_SEQUENTIAL ||
       cinfo->data_precision != 8) {
     is_baseline = FALSE;
   } else {
@@ -530,10 +533,17 @@ write_frame_header (j_compress_ptr cinfo)
 
   /* Emit the proper SOF marker */
   if (cinfo->arith_code) {
-    emit_sof(cinfo, M_SOF9);  /* SOF code for arithmetic coding */
+    if (cinfo->process == JPROC_PROGRESSIVE)
+      emit_sof(cinfo, M_SOF10); /* SOF code for progressive arithmetic */
+    else if (cinfo->process == JPROC_LOSSLESS)
+      emit_sof(cinfo, M_SOF11);  /* SOF code for lossless arithmetic */
+    else
+      emit_sof(cinfo, M_SOF9);  /* SOF code for sequential arithmetic */
   } else {
-    if (cinfo->progressive_mode)
+    if (cinfo->process == JPROC_PROGRESSIVE)
       emit_sof(cinfo, M_SOF2);  /* SOF code for progressive Huffman */
+    else if (cinfo->process == JPROC_LOSSLESS)
+      emit_sof(cinfo, M_SOF3);  /* SOF code for lossless Huffman */
     else if (is_baseline)
       emit_sof(cinfo, M_SOF0);  /* SOF code for baseline implementation */
     else
@@ -567,7 +577,7 @@ write_scan_header (j_compress_ptr cinfo)
      */
     for (i = 0; i < cinfo->comps_in_scan; i++) {
       compptr = cinfo->cur_comp_info[i];
-      if (cinfo->progressive_mode) {
+      if (cinfo->process == JPROC_PROGRESSIVE) {
   /* Progressive mode: only DC or only AC tables are used in one scan */
   if (cinfo->Ss == 0) {
     if (cinfo->Ah == 0)  /* DC needs no table for refinement scan */
@@ -575,6 +585,9 @@ write_scan_header (j_compress_ptr cinfo)
   } else {
     emit_dht(cinfo, compptr->ac_tbl_no, TRUE);
   }
+      } else if (cinfo->process == JPROC_LOSSLESS) {
+  /* Lossless mode: only DC tables are used */
+  emit_dht(cinfo, compptr->dc_tbl_no, FALSE);
       } else {
   /* Sequential mode: need both DC and AC tables */
   emit_dht(cinfo, compptr->dc_tbl_no, FALSE);