commit 5bab2d8085d9c312dd68831e675debd37dc2ef06
author Dichen Zhang <dichenzhang@google.com> Wed Aug 02 15:14:54 2023 +0000
committer Android (Google) Code Review <android-gerrit@google.com> Wed Aug 02 15:14:54 2023 +0000
tree 1346a035acea1a1d74caecc80c47b85613594673
parent 6cb305e12c3060ab1b6cea9cda236f66d7207729
parent 1790bb5d5bd420047ed14ec0bfd2c73478c747d0

Merge "ultrahdr: do not select less accurate integer method during dct" into main

libs/ultrahdr/jpegdecoderhelper.cpp

diff --git a/libs/ultrahdr/jpegdecoderhelper.cpp b/libs/ultrahdr/jpegdecoderhelper.cpp
index fef5444..c077bcb 100644
--- a/libs/ultrahdr/jpegdecoderhelper.cpp
+++ b/libs/ultrahdr/jpegdecoderhelper.cpp
@@ -256,7 +256,7 @@
         cinfo.raw_data_out = TRUE;
     }
 
-    cinfo.dct_method = JDCT_IFAST;
+    cinfo.dct_method = JDCT_ISLOW;
 
     jpeg_start_decompress(&cinfo);
 

libs/ultrahdr/jpegencoderhelper.cpp

diff --git a/libs/ultrahdr/jpegencoderhelper.cpp b/libs/ultrahdr/jpegencoderhelper.cpp
index a03547b..de621bd 100644
--- a/libs/ultrahdr/jpegencoderhelper.cpp
+++ b/libs/ultrahdr/jpegencoderhelper.cpp
@@ -140,7 +140,7 @@
     jpeg_set_quality(cinfo, quality, TRUE);
     jpeg_set_colorspace(cinfo, isSingleChannel ? JCS_GRAYSCALE : JCS_YCbCr);
     cinfo->raw_data_in = TRUE;
-    cinfo->dct_method = JDCT_IFAST;
+    cinfo->dct_method = JDCT_ISLOW;
 
     if (!isSingleChannel) {
         // Configure sampling factors. The sampling factor is JPEG subsampling 420 because the