Update libjpeg-turbo to r856.
BUG=132952
TEST=none
Review URL: https://chromiumcodereview.appspot.com/10700197
git-svn-id: http://src.chromium.org/svn/trunk/deps/third_party/libjpeg_turbo@147403 4ff67af0-8c30-449e-8e8b-ad334ec8d88c
diff --git a/turbojpeg.h b/turbojpeg.h
index 343788a..7610221 100644
--- a/turbojpeg.h
+++ b/turbojpeg.h
@@ -1,5 +1,5 @@
/*
- * Copyright (C)2009-2011 D. R. Commander. All Rights Reserved.
+ * Copyright (C)2009-2012 D. R. Commander. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
@@ -226,28 +226,30 @@
*/
#define TJFLAG_BOTTOMUP 2
/**
- * Turn off CPU auto-detection and force TurboJPEG to use MMX code (IPP and
- * 32-bit libjpeg-turbo versions only.)
+ * Turn off CPU auto-detection and force TurboJPEG to use MMX code (if the
+ * underlying codec supports it.)
*/
#define TJFLAG_FORCEMMX 8
/**
- * Turn off CPU auto-detection and force TurboJPEG to use SSE code (32-bit IPP
- * and 32-bit libjpeg-turbo versions only)
+ * Turn off CPU auto-detection and force TurboJPEG to use SSE code (if the
+ * underlying codec supports it.)
*/
#define TJFLAG_FORCESSE 16
/**
- * Turn off CPU auto-detection and force TurboJPEG to use SSE2 code (32-bit IPP
- * and 32-bit libjpeg-turbo versions only)
+ * Turn off CPU auto-detection and force TurboJPEG to use SSE2 code (if the
+ * underlying codec supports it.)
*/
#define TJFLAG_FORCESSE2 32
/**
- * Turn off CPU auto-detection and force TurboJPEG to use SSE3 code (64-bit IPP
- * version only)
+ * Turn off CPU auto-detection and force TurboJPEG to use SSE3 code (if the
+ * underlying codec supports it.)
*/
#define TJFLAG_FORCESSE3 128
/**
- * Use fast, inaccurate chrominance upsampling routines in the JPEG
- * decompressor (libjpeg and libjpeg-turbo versions only)
+ * When decompressing, use the fastest chrominance upsampling algorithm
+ * available in the underlying codec. The default is to use smooth upsampling,
+ * which creates a smooth transition between neighboring chrominance components
+ * in order to reduce upsampling artifacts in the decompressed image.
*/
#define TJFLAG_FASTUPSAMPLE 256
/**
@@ -258,6 +260,24 @@
* versions of TurboJPEG.
*/
#define TJFLAG_NOREALLOC 1024
+/**
+ * Use the fastest DCT/IDCT algorithm available in the underlying codec. The
+ * default if this flag is not specified is implementation-specific. The
+ * libjpeg implementation, for example, uses the fast algorithm by default when
+ * compressing, because this has been shown to have only a very slight effect
+ * on accuracy, but it uses the accurate algorithm when decompressing, because
+ * this has been shown to have a larger effect.
+ */
+#define TJFLAG_FASTDCT 2048
+/**
+ * Use the most accurate DCT/IDCT algorithm available in the underlying codec.
+ * The default if this flag is not specified is implementation-specific. The
+ * libjpeg implementation, for example, uses the fast algorithm by default when
+ * compressing, because this has been shown to have only a very slight effect
+ * on accuracy, but it uses the accurate algorithm when decompressing, because
+ * this has been shown to have a larger effect.
+ */
+#define TJFLAG_ACCURATEDCT 4096
/**