Merge pull request opencv#17648 from alalek:update_libjpeg

Author: alalek

3rdparty/libjpeg/README

@@ -1,7 +1,7 @@
 The Independent JPEG Group's JPEG software
 ==========================================
 
-README for release 9c of 14-Jan-2018
+README for release 9d of 12-Jan-2020
 ====================================
 
 This distribution contains the ninth public release of the Independent JPEG
@@ -10,8 +10,8 @@ to use it for any purpose, subject to the conditions under LEGAL ISSUES, below.
 
 This software is the work of Tom Lane, Guido Vollbeding, Philip Gladstone,
 Bill Allombert, Jim Boucher, Lee Crocker, Bob Friesenhahn, Ben Jackson,
-Julian Minguillon, Luis Ortiz, George Phillips, Davide Rossi, Ge' Weijers,
-and other members of the Independent JPEG Group.
+John Korejwa, Julian Minguillon, Luis Ortiz, George Phillips, Davide Rossi,
+Ge' Weijers, and other members of the Independent JPEG Group.
 
 IJG is not affiliated with the ISO/IEC JTC1/SC29/WG1 standards committee
 (previously known as JPEG, together with ITU-T SG16).
@@ -115,7 +115,7 @@ with respect to this software, its quality, accuracy, merchantability, or
 fitness for a particular purpose.  This software is provided "AS IS", and you,
 its user, assume the entire risk as to its quality and accuracy.
 
-This software is copyright (C) 1991-2018, Thomas G. Lane, Guido Vollbeding.
+This software is copyright (C) 1991-2020, Thomas G. Lane, Guido Vollbeding.
 All Rights Reserved except as specified below.
 
 Permission is hereby granted to use, copy, modify, and distribute this
@@ -152,13 +152,6 @@ The same holds for its supporting scripts (config.guess, config.sub,
 ltmain.sh).  Another support script, install-sh, is copyright by X Consortium
 but is also freely distributable.
 
-The IJG distribution formerly included code to read and write GIF files.
-To avoid entanglement with the Unisys LZW patent (now expired), GIF reading
-support has been removed altogether, and the GIF writer has been simplified
-to produce "uncompressed GIFs".  This technique does not use the LZW
-algorithm; the resulting GIF files are larger than usual, but are readable
-by all standard GIF decoders.
-
 
 REFERENCES
 ==========
@@ -246,8 +239,8 @@ ARCHIVE LOCATIONS
 The "official" archive site for this software is www.ijg.org.
 The most recent released version can always be found there in
 directory "files".  This particular version will be archived as
-http://www.ijg.org/files/jpegsrc.v9c.tar.gz, and in Windows-compatible
-"zip" archive format as http://www.ijg.org/files/jpegsr9c.zip.
+http://www.ijg.org/files/jpegsrc.v9d.tar.gz, and in Windows-compatible
+"zip" archive format as http://www.ijg.org/files/jpegsr9d.zip.
 
 The JPEG FAQ (Frequently Asked Questions) article is a source of some
 general information about JPEG.

3rdparty/libjpeg/change.log

@@ -1,6 +1,55 @@
 CHANGE LOG for Independent JPEG Group's JPEG software
 
 
+Version 9d  12-Jan-2020
+-----------------------
+
+Optimize the optimal Huffman code table generation to produce
+slightly smaller files.  Thank to John Korejwa for suggestion.
+Note: Requires rebuild of testimgp.jpg.
+
+Decoding Huffman: Use default tables if tables are not defined.
+Thank to Simone Azzalin for report (Motion JPEG),
+and to Martin Strunz for hint.
+
+Add sanity check in optimal Huffman code table generation.
+Thank to Adam Farley for suggestion.
+
+rdtarga.c: use read_byte(), with EOF check, instead of getc()
+in read_*_pixel().
+Thank to Chijin Zhou for cjpeg potential vulnerability report.
+
+jmemnobs.c: respect the max_memory_to_use setting in
+jpeg_mem_available() computation.  Thank to Sheng Shu and
+Dongdong She for djpeg potential vulnerability report.
+
+jdarith.c, jdhuff.c: avoid left shift of negative value
+compiler warning in decode_mcu_AC_refine().
+Thank to Indu Bhagat for suggestion.
+
+Add x64 (64-bit) platform support, avoid compiler warnings.
+Thank to Jonathan Potter, Feiyun Wang, and Sheng Shu for suggestion.
+
+Adjust libjpeg version specification for pkg-config file.
+Thank to Chen Chen for suggestion.
+
+Restore GIF read and write support from libjpeg version 6a.
+Thank to Wolfgang Werner (W.W.) Heinz for suggestion.
+
+Improve consistency in raw (downsampled) image data processing mode.
+Thank to Zhongyuan Zhou for hint.
+
+Avoid out of bounds array read (AC derived table pointers)
+in start pass in jdhuff.c.  Thank to Peng Li for report.
+
+Improve code sanity (jdhuff.c).
+Thank to Reza Mirzazade farkhani for reports.
+
+Add jpegtran -drop option; add options to the crop extension and wipe
+to fill the extra area with content from the source image region,
+instead of gray out.
+
+
 Version 9c  14-Jan-2018
 -----------------------
 

3rdparty/libjpeg/jcarith.c

@@ -1,7 +1,7 @@
 /*
  * jcarith.c
  *
- * Developed 1997-2013 by Guido Vollbeding.
+ * Developed 1997-2019 by Guido Vollbeding.
  * This file is part of the Independent JPEG Group's software.
  * For conditions of distribution and use, see the accompanying README file.
  *
@@ -181,11 +181,11 @@ finish_pass (j_compress_ptr cinfo)
     if (e->zc)  /* output final pending zero bytes */
       do emit_byte(0x00, cinfo);
       while (--e->zc);
-    emit_byte((e->c >> 19) & 0xFF, cinfo);
+    emit_byte((int) ((e->c >> 19) & 0xFF), cinfo);
     if (((e->c >> 19) & 0xFF) == 0xFF)
       emit_byte(0x00, cinfo);
     if (e->c & 0x7F800L) {
-      emit_byte((e->c >> 11) & 0xFF, cinfo);
+      emit_byte((int) ((e->c >> 11) & 0xFF), cinfo);
       if (((e->c >> 11) & 0xFF) == 0xFF)
 	emit_byte(0x00, cinfo);
     }
@@ -280,7 +280,8 @@ arith_encode (j_compress_ptr cinfo, unsigned char *st, int val)
 	/* Note: The 3 spacer bits in the C register guarantee
 	 * that the new buffer byte can't be 0xFF here
 	 * (see page 160 in the P&M JPEG book). */
-	e->buffer = temp & 0xFF;  /* new output byte, might overflow later */
+	/* New output byte, might overflow later */
+	e->buffer = (int) (temp & 0xFF);
       } else if (temp == 0xFF) {
 	++e->sc;  /* stack 0xFF byte (which might overflow later) */
       } else {
@@ -302,7 +303,8 @@ arith_encode (j_compress_ptr cinfo, unsigned char *st, int val)
 	    emit_byte(0x00, cinfo);
 	  } while (--e->sc);
 	}
-	e->buffer = temp & 0xFF;  /* new output byte (can still overflow) */
+	/* New output byte (can still overflow) */
+	e->buffer = (int) (temp & 0xFF);
       }
       e->c &= 0x7FFFFL;
       e->ct += 8;
@@ -926,9 +928,8 @@ jinit_arith_encoder (j_compress_ptr cinfo)
   arith_entropy_ptr entropy;
   int i;
 
-  entropy = (arith_entropy_ptr)
-    (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
-				SIZEOF(arith_entropy_encoder));
+  entropy = (arith_entropy_ptr) (*cinfo->mem->alloc_small)
+    ((j_common_ptr) cinfo, JPOOL_IMAGE, SIZEOF(arith_entropy_encoder));
   cinfo->entropy = &entropy->pub;
   entropy->pub.start_pass = start_pass;
   entropy->pub.finish_pass = finish_pass;