diff --git a/CMakeLists.txt b/CMakeLists.txt
index 99c11ef3..460c143c 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -773,7 +773,7 @@ else()
   set(MD5_PPM_3x2_IFAST fd283664b3b49127984af0a7f118fccd)
   set(MD5_JPEG_420_ISLOW_ARI e986fb0a637a8d833d96e8a6d6d84ea1)
   set(MD5_JPEG_444_ISLOW_PROGARI 0a8f1c8f66e113c3cf635df0a475a617)
-  set(MD5_PPM_420M_IFAST_ARI 72b59a99bcf1de24c5b27d151bde2437)
+  set(MD5_PPM_420M_IFAST_ARI 57251da28a35b46eecb7177d82d10e0e)
   set(MD5_JPEG_420_ISLOW 9a68f56bc76e466aa7e52f415d0f4a5f)
   set(MD5_PPM_420M_ISLOW_2_1 9f9de8c0612f8d06869b960b05abf9c9)
   set(MD5_PPM_420M_ISLOW_15_8 b6875bc070720b899566cc06459b63b7)
@@ -1164,7 +1164,7 @@ foreach(libtype ${TEST_LIBTYPES})
 
   if(WITH_ARITH_DEC)
     # CC: RGB->YCC  SAMP: h2v2 merged  IDCT: ifast  ENT: arith
-    add_bittest(djpeg 420m-ifast-ari "-fast;-ppm"
+    add_bittest(djpeg 420m-ifast-ari "-fast;-skip;1,20;-ppm"
       testout_420m_ifast_ari.ppm ${TESTIMAGES}/testimgari.jpg
       ${MD5_PPM_420M_IFAST_ARI})
 
@@ -1300,6 +1300,11 @@ endforeach()
 add_custom_target(testclean COMMAND ${CMAKE_COMMAND} -P
   ${CMAKE_CURRENT_SOURCE_DIR}/cmakescripts/testclean.cmake)
 
+configure_file(croptest.in croptest @ONLY)
+add_custom_target(croptest
+  COMMAND echo croptest
+  COMMAND ${BASH} ${CMAKE_CURRENT_BINARY_DIR}/croptest)
+
 if(WITH_TURBOJPEG)
   configure_file(tjbenchtest.in tjbenchtest @ONLY)
   configure_file(tjexampletest.in tjexampletest @ONLY)
diff --git a/ChangeLog.md b/ChangeLog.md
index 1dfe9e06..adb8a60b 100644
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -80,6 +80,23 @@ limit the number of allowable scans in the input file.
      - Both programs now accept a `-strict` argument, which can be used to
 treat all warnings as fatal.
 
+10. Fixed "using JNI after critical get" errors that occurred on Android
+platforms when using any of the YUV encoding/compression/decompression/decoding
+methods in the TurboJPEG Java API.
+
+11. Fixed or worked around multiple issues with `jpeg_skip_scanlines()`:
+
+     - Fixed segfaults or "Corrupt JPEG data: premature end of data segment"
+errors in `jpeg_skip_scanlines()` that occurred when decompressing 4:2:2 or
+4:2:0 JPEG images using merged (non-fancy) upsampling/color conversion (that
+is, when setting `cinfo.do_fancy_upsampling` to `FALSE`.)  2.0.0[6] was a
+similar fix, but it did not cover all cases.
+     - `jpeg_skip_scanlines()` now throws an error if two-pass color
+quantization is enabled.  Two-pass color quantization never worked properly
+with `jpeg_skip_scanlines()`, and the issues could not readily be fixed.
+     - Fixed an issue whereby `jpeg_skip_scanlines()` always returned 0 when
+skipping past the end of an image.
+
 
 2.0.5
 =====
diff --git a/README.md b/README.md
index 6df6c5ea..bbeb15a2 100644
--- a/README.md
+++ b/README.md
@@ -179,8 +179,8 @@ supported and which aren't.
 
 NOTE:  As of this writing, extensive research has been conducted into the
 usefulness of DCT scaling as a means of data reduction and SmartScale as a
-means of quality improvement.  The reader is invited to peruse the research at
-<http://www.libjpeg-turbo.org/About/SmartScale> and draw his/her own conclusions,
+means of quality improvement.  Readers are invited to peruse the research at
+<http://www.libjpeg-turbo.org/About/SmartScale> and draw their own conclusions,
 but it is the general belief of our project that these features have not
 demonstrated sufficient usefulness to justify inclusion in libjpeg-turbo.
 
diff --git a/croptest.in b/croptest.in
new file mode 100755
index 00000000..7e3c2931
--- /dev/null
+++ b/croptest.in
@@ -0,0 +1,95 @@
+#!/bin/bash
+
+set -u
+set -e
+trap onexit INT
+trap onexit TERM
+trap onexit EXIT
+
+onexit()
+{
+	if [ -d $OUTDIR ]; then
+		rm -rf $OUTDIR
+	fi
+}
+
+runme()
+{
+	echo \*\*\* $*
+	$*
+}
+
+IMAGE=vgl_6548_0026a.bmp
+WIDTH=128
+HEIGHT=95
+IMGDIR=@CMAKE_CURRENT_SOURCE_DIR@/testimages
+OUTDIR=`mktemp -d /tmp/__croptest_output.XXXXXX`
+EXEDIR=@CMAKE_CURRENT_BINARY_DIR@
+
+if [ -d $OUTDIR ]; then
+	rm -rf $OUTDIR
+fi
+mkdir -p $OUTDIR
+
+exec >$EXEDIR/croptest.log
+
+echo "============================================================"
+echo "$IMAGE ($WIDTH x $HEIGHT)"
+echo "============================================================"
+echo
+
+for PROGARG in "" -progressive; do
+
+	cp $IMGDIR/$IMAGE $OUTDIR
+	basename=`basename $IMAGE .bmp`
+	echo "------------------------------------------------------------"
+	echo "Generating test images"
+	echo "------------------------------------------------------------"
+	echo
+	runme $EXEDIR/cjpeg $PROGARG -grayscale -outfile $OUTDIR/${basename}_GRAY.jpg $IMGDIR/${basename}.bmp
+	runme $EXEDIR/cjpeg $PROGARG -sample 2x2 -outfile $OUTDIR/${basename}_420.jpg $IMGDIR/${basename}.bmp
+	runme $EXEDIR/cjpeg $PROGARG -sample 2x1 -outfile $OUTDIR/${basename}_422.jpg $IMGDIR/${basename}.bmp
+	runme $EXEDIR/cjpeg $PROGARG -sample 1x2 -outfile $OUTDIR/${basename}_440.jpg $IMGDIR/${basename}.bmp
+	runme $EXEDIR/cjpeg $PROGARG -sample 1x1 -outfile $OUTDIR/${basename}_444.jpg $IMGDIR/${basename}.bmp
+	echo
+
+	for NSARG in "" -nosmooth; do
+
+		for COLORSARG in "" "-colors 256 -dither none -onepass"; do
+
+			for Y in {0..16}; do
+
+				for H in {1..16}; do
+
+					X=$(( (Y*16)%128 ))
+					W=$(( WIDTH-X-7 ))
+					if [ $Y -le 15 ]; then
+						CROPSPEC="${W}x${H}+${X}+${Y}"
+					else
+						Y2=$(( HEIGHT-H ));
+						CROPSPEC="${W}x${H}+${X}+${Y2}"
+					fi
+
+					echo "------------------------------------------------------------"
+					echo $PROGARG $NSARG $COLORSARG -crop $CROPSPEC
+					echo "------------------------------------------------------------"
+					echo
+					for samp in GRAY 420 422 440 444; do
+						$EXEDIR/djpeg $NSARG $COLORSARG -rgb -outfile $OUTDIR/${basename}_${samp}_full.ppm $OUTDIR/${basename}_${samp}.jpg
+						convert -crop $CROPSPEC $OUTDIR/${basename}_${samp}_full.ppm $OUTDIR/${basename}_${samp}_ref.ppm
+						runme $EXEDIR/djpeg $NSARG $COLORSARG -crop $CROPSPEC -rgb -outfile $OUTDIR/${basename}_${samp}.ppm $OUTDIR/${basename}_${samp}.jpg
+						runme cmp $OUTDIR/${basename}_${samp}.ppm $OUTDIR/${basename}_${samp}_ref.ppm
+					done
+					echo
+
+				done
+
+			done
+
+		done
+
+	done
+
+done
+
+echo SUCCESS!
diff --git a/djpeg.c b/djpeg.c
index 427cc3e2..fb015730 100644
--- a/djpeg.c
+++ b/djpeg.c
@@ -5,7 +5,7 @@
  * Copyright (C) 1991-1997, Thomas G. Lane.
  * Modified 2013 by Guido Vollbeding.
  * libjpeg-turbo Modifications:
- * Copyright (C) 2010-2011, 2013-2017, 2019, D. R. Commander.
+ * Copyright (C) 2010-2011, 2013-2017, 2019-2020, D. R. Commander.
  * Copyright (C) 2015, Google, Inc.
  * For conditions of distribution and use, see the accompanying README.ijg
  * file.
@@ -730,7 +730,12 @@ main(int argc, char **argv)
                                           dest_mgr->buffer_height);
       (*dest_mgr->put_pixel_rows) (&cinfo, dest_mgr, num_scanlines);
     }
-    jpeg_skip_scanlines(&cinfo, skip_end - skip_start + 1);
+    if ((tmp = jpeg_skip_scanlines(&cinfo, skip_end - skip_start + 1)) !=
+        skip_end - skip_start + 1) {
+      fprintf(stderr, "%s: jpeg_skip_scanlines() returned %d rather than %d\n",
+              progname, tmp, skip_end - skip_start + 1);
+      exit(EXIT_FAILURE);
+    }
     while (cinfo.output_scanline < cinfo.output_height) {
       num_scanlines = jpeg_read_scanlines(&cinfo, dest_mgr->buffer,
                                           dest_mgr->buffer_height);
@@ -766,13 +771,24 @@ main(int argc, char **argv)
     cinfo.output_height = tmp;
 
     /* Process data */
-    jpeg_skip_scanlines(&cinfo, crop_y);
+    if ((tmp = jpeg_skip_scanlines(&cinfo, crop_y)) != crop_y) {
+      fprintf(stderr, "%s: jpeg_skip_scanlines() returned %d rather than %d\n",
+              progname, tmp, crop_y);
+      exit(EXIT_FAILURE);
+    }
     while (cinfo.output_scanline < crop_y + crop_height) {
       num_scanlines = jpeg_read_scanlines(&cinfo, dest_mgr->buffer,
                                           dest_mgr->buffer_height);
       (*dest_mgr->put_pixel_rows) (&cinfo, dest_mgr, num_scanlines);
     }
-    jpeg_skip_scanlines(&cinfo, cinfo.output_height - crop_y - crop_height);
+    if ((tmp =
+         jpeg_skip_scanlines(&cinfo,
+                             cinfo.output_height - crop_y - crop_height)) !=
+        cinfo.output_height - crop_y - crop_height) {
+      fprintf(stderr, "%s: jpeg_skip_scanlines() returned %d rather than %d\n",
+              progname, tmp, cinfo.output_height - crop_y - crop_height);
+      exit(EXIT_FAILURE);
+    }
 
   /* Normal full-image decompress */
   } else {
diff --git a/jdapistd.c b/jdapistd.c
index 86f2cd50..bd68bdca 100644
--- a/jdapistd.c
+++ b/jdapistd.c
@@ -4,7 +4,7 @@
  * This file was part of the Independent JPEG Group's software:
  * Copyright (C) 1994-1996, Thomas G. Lane.
  * libjpeg-turbo Modifications:
- * Copyright (C) 2010, 2015-2019, D. R. Commander.
+ * Copyright (C) 2010, 2015-2020, D. R. Commander.
  * Copyright (C) 2015, Google, Inc.
  * For conditions of distribution and use, see the accompanying README.ijg
  * file.
@@ -21,6 +21,8 @@
 #include "jinclude.h"
 #include "jdmainct.h"
 #include "jdcoefct.h"
+#include "jdmaster.h"
+#include "jdmerge.h"
 #include "jdsample.h"
 #include "jmemsys.h"
 
@@ -316,6 +318,8 @@ LOCAL(void)
 read_and_discard_scanlines(j_decompress_ptr cinfo, JDIMENSION num_lines)
 {
   JDIMENSION n;
+  my_master_ptr master = (my_master_ptr)cinfo->master;
+  JSAMPARRAY scanlines = NULL;
   void (*color_convert) (j_decompress_ptr cinfo, JSAMPIMAGE input_buf,
                          JDIMENSION input_row, JSAMPARRAY output_buf,
                          int num_rows) = NULL;
@@ -332,8 +336,13 @@ read_and_discard_scanlines(j_decompress_ptr cinfo, JDIMENSION num_lines)
     cinfo->cquantize->color_quantize = noop_quantize;
   }
 
+  if (master->using_merged_upsample && cinfo->max_v_samp_factor == 2) {
+    my_merged_upsample_ptr upsample = (my_merged_upsample_ptr)cinfo->upsample;
+    scanlines = &upsample->spare_row;
+  }
+
   for (n = 0; n < num_lines; n++)
-    jpeg_read_scanlines(cinfo, NULL, 1);
+    jpeg_read_scanlines(cinfo, scanlines, 1);
 
   if (color_convert)
     cinfo->cconvert->color_convert = color_convert;
@@ -353,6 +362,12 @@ increment_simple_rowgroup_ctr(j_decompress_ptr cinfo, JDIMENSION rows)
 {
   JDIMENSION rows_left;
   my_main_ptr main_ptr = (my_main_ptr)cinfo->main;
+  my_master_ptr master = (my_master_ptr)cinfo->master;
+
+  if (master->using_merged_upsample && cinfo->max_v_samp_factor == 2) {
+    read_and_discard_scanlines(cinfo, rows);
+    return;
+  }
 
   /* Increment the counter to the next row group after the skipped rows. */
   main_ptr->rowgroup_ctr += rows / cinfo->max_v_samp_factor;
@@ -382,21 +397,27 @@ jpeg_skip_scanlines(j_decompress_ptr cinfo, JDIMENSION num_lines)
 {
   my_main_ptr main_ptr = (my_main_ptr)cinfo->main;
   my_coef_ptr coef = (my_coef_ptr)cinfo->coef;
+  my_master_ptr master = (my_master_ptr)cinfo->master;
   my_upsample_ptr upsample = (my_upsample_ptr)cinfo->upsample;
   JDIMENSION i, x;
   int y;
   JDIMENSION lines_per_iMCU_row, lines_left_in_iMCU_row, lines_after_iMCU_row;
   JDIMENSION lines_to_skip, lines_to_read;
 
+  /* Two-pass color quantization is not supported. */
+  if (cinfo->quantize_colors && cinfo->two_pass_quantize)
+    ERREXIT(cinfo, JERR_NOTIMPL);
+
   if (cinfo->global_state != DSTATE_SCANNING)
     ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
 
   /* Do not skip past the bottom of the image. */
   if (cinfo->output_scanline + num_lines >= cinfo->output_height) {
+    num_lines = cinfo->output_height - cinfo->output_scanline;
     cinfo->output_scanline = cinfo->output_height;
     (*cinfo->inputctl->finish_input_pass) (cinfo);
     cinfo->inputctl->eoi_reached = TRUE;
-    return cinfo->output_height - cinfo->output_scanline;
+    return num_lines;
   }
 
   if (num_lines == 0)
@@ -445,8 +466,10 @@ jpeg_skip_scanlines(j_decompress_ptr cinfo, JDIMENSION num_lines)
     main_ptr->buffer_full = FALSE;
     main_ptr->rowgroup_ctr = 0;
     main_ptr->context_state = CTX_PREPARE_FOR_IMCU;
-    upsample->next_row_out = cinfo->max_v_samp_factor;
-    upsample->rows_to_go = cinfo->output_height - cinfo->output_scanline;
+    if (!master->using_merged_upsample) {
+      upsample->next_row_out = cinfo->max_v_samp_factor;
+      upsample->rows_to_go = cinfo->output_height - cinfo->output_scanline;
+    }
   }
 
   /* Skipping is much simpler when context rows are not required. */
@@ -458,8 +481,10 @@ jpeg_skip_scanlines(j_decompress_ptr cinfo, JDIMENSION num_lines)
       cinfo->output_scanline += lines_left_in_iMCU_row;
       main_ptr->buffer_full = FALSE;
       main_ptr->rowgroup_ctr = 0;
-      upsample->next_row_out = cinfo->max_v_samp_factor;
-      upsample->rows_to_go = cinfo->output_height - cinfo->output_scanline;
+      if (!master->using_merged_upsample) {
+        upsample->next_row_out = cinfo->max_v_samp_factor;
+        upsample->rows_to_go = cinfo->output_height - cinfo->output_scanline;
+      }
     }
   }
 
@@ -494,7 +519,8 @@ jpeg_skip_scanlines(j_decompress_ptr cinfo, JDIMENSION num_lines)
       cinfo->output_iMCU_row += lines_to_skip / lines_per_iMCU_row;
       increment_simple_rowgroup_ctr(cinfo, lines_to_read);
     }
-    upsample->rows_to_go = cinfo->output_height - cinfo->output_scanline;
+    if (!master->using_merged_upsample)
+      upsample->rows_to_go = cinfo->output_height - cinfo->output_scanline;
     return num_lines;
   }
 
@@ -537,7 +563,8 @@ jpeg_skip_scanlines(j_decompress_ptr cinfo, JDIMENSION num_lines)
    * bit odd, since "rows_to_go" seems to be redundantly keeping track of
    * output_scanline.
    */
-  upsample->rows_to_go = cinfo->output_height - cinfo->output_scanline;
+  if (!master->using_merged_upsample)
+    upsample->rows_to_go = cinfo->output_height - cinfo->output_scanline;
 
   /* Always skip the requested number of lines. */
   return num_lines;
diff --git a/jdmerge.c b/jdmerge.c
index dff5a350..833ad675 100644
--- a/jdmerge.c
+++ b/jdmerge.c
@@ -5,7 +5,7 @@
  * Copyright (C) 1994-1996, Thomas G. Lane.
  * libjpeg-turbo Modifications:
  * Copyright 2009 Pierre Ossman <ossman@cendio.se> for Cendio AB
- * Copyright (C) 2009, 2011, 2014-2015, D. R. Commander.
+ * Copyright (C) 2009, 2011, 2014-2015, 2020, D. R. Commander.
  * Copyright (C) 2013, Linaro Limited.
  * For conditions of distribution and use, see the accompanying README.ijg
  * file.
@@ -40,41 +40,13 @@
 #define JPEG_INTERNALS
 #include "jinclude.h"
 #include "jpeglib.h"
+#include "jdmerge.h"
 #include "jsimd.h"
 #include "jconfigint.h"
 
 #ifdef UPSAMPLE_MERGING_SUPPORTED
 
 
-/* Private subobject */
-
-typedef struct {
-  struct jpeg_upsampler pub;    /* public fields */
-
-  /* Pointer to routine to do actual upsampling/conversion of one row group */
-  void (*upmethod) (j_decompress_ptr cinfo, JSAMPIMAGE input_buf,
-                    JDIMENSION in_row_group_ctr, JSAMPARRAY output_buf);
-
-  /* Private state for YCC->RGB conversion */
-  int *Cr_r_tab;                /* => table for Cr to R conversion */
-  int *Cb_b_tab;                /* => table for Cb to B conversion */
-  JLONG *Cr_g_tab;              /* => table for Cr to G conversion */
-  JLONG *Cb_g_tab;              /* => table for Cb to G conversion */
-
-  /* For 2:1 vertical sampling, we produce two output rows at a time.
-   * We need a "spare" row buffer to hold the second output row if the
-   * application provides just a one-row buffer; we also use the spare
-   * to discard the dummy last row if the image height is odd.
-   */
-  JSAMPROW spare_row;
-  boolean spare_full;           /* T if spare buffer is occupied */
-
-  JDIMENSION out_row_width;     /* samples per output row */
-  JDIMENSION rows_to_go;        /* counts rows remaining in image */
-} my_upsampler;
-
-typedef my_upsampler *my_upsample_ptr;
-
 #define SCALEBITS       16      /* speediest right-shift on some machines */
 #define ONE_HALF        ((JLONG)1 << (SCALEBITS - 1))
 #define FIX(x)          ((JLONG)((x) * (1L << SCALEBITS) + 0.5))
@@ -189,7 +161,7 @@ typedef my_upsampler *my_upsample_ptr;
 LOCAL(void)
 build_ycc_rgb_table(j_decompress_ptr cinfo)
 {
-  my_upsample_ptr upsample = (my_upsample_ptr)cinfo->upsample;
+  my_merged_upsample_ptr upsample = (my_merged_upsample_ptr)cinfo->upsample;
   int i;
   JLONG x;
   SHIFT_TEMPS
@@ -232,7 +204,7 @@ build_ycc_rgb_table(j_decompress_ptr cinfo)
 METHODDEF(void)
 start_pass_merged_upsample(j_decompress_ptr cinfo)
 {
-  my_upsample_ptr upsample = (my_upsample_ptr)cinfo->upsample;
+  my_merged_upsample_ptr upsample = (my_merged_upsample_ptr)cinfo->upsample;
 
   /* Mark the spare buffer empty */
   upsample->spare_full = FALSE;
@@ -254,7 +226,7 @@ merged_2v_upsample(j_decompress_ptr cinfo, JSAMPIMAGE input_buf,
                    JDIMENSION *out_row_ctr, JDIMENSION out_rows_avail)
 /* 2:1 vertical sampling case: may need a spare row. */
 {
-  my_upsample_ptr upsample = (my_upsample_ptr)cinfo->upsample;
+  my_merged_upsample_ptr upsample = (my_merged_upsample_ptr)cinfo->upsample;
   JSAMPROW work_ptrs[2];
   JDIMENSION num_rows;          /* number of rows returned to caller */
 
@@ -305,7 +277,7 @@ merged_1v_upsample(j_decompress_ptr cinfo, JSAMPIMAGE input_buf,
                    JDIMENSION *out_row_ctr, JDIMENSION out_rows_avail)
 /* 1:1 vertical sampling case: much easier, never need a spare row. */
 {
-  my_upsample_ptr upsample = (my_upsample_ptr)cinfo->upsample;
+  my_merged_upsample_ptr upsample = (my_merged_upsample_ptr)cinfo->upsample;
 
   /* Just do the upsampling. */
   (*upsample->upmethod) (cinfo, input_buf, *in_row_group_ctr,
@@ -566,11 +538,11 @@ h2v2_merged_upsample_565D(j_decompress_ptr cinfo, JSAMPIMAGE input_buf,
 GLOBAL(void)
 jinit_merged_upsampler(j_decompress_ptr cinfo)
 {
-  my_upsample_ptr upsample;
+  my_merged_upsample_ptr upsample;
 
-  upsample = (my_upsample_ptr)
+  upsample = (my_merged_upsample_ptr)
     (*cinfo->mem->alloc_small) ((j_common_ptr)cinfo, JPOOL_IMAGE,
-                                sizeof(my_upsampler));
+                                sizeof(my_merged_upsampler));
   cinfo->upsample = (struct jpeg_upsampler *)upsample;
   upsample->pub.start_pass = start_pass_merged_upsample;
   upsample->pub.need_context_rows = FALSE;
diff --git a/jdmerge.h b/jdmerge.h
new file mode 100644
index 00000000..b583396b
--- /dev/null
+++ b/jdmerge.h
@@ -0,0 +1,47 @@
+/*
+ * jdmerge.h
+ *
+ * This file was part of the Independent JPEG Group's software:
+ * Copyright (C) 1994-1996, Thomas G. Lane.
+ * libjpeg-turbo Modifications:
+ * Copyright (C) 2020, D. R. Commander.
+ * For conditions of distribution and use, see the accompanying README.ijg
+ * file.
+ */
+
+#define JPEG_INTERNALS
+#include "jpeglib.h"
+
+#ifdef UPSAMPLE_MERGING_SUPPORTED
+
+
+/* Private subobject */
+
+typedef struct {
+  struct jpeg_upsampler pub;    /* public fields */
+
+  /* Pointer to routine to do actual upsampling/conversion of one row group */
+  void (*upmethod) (j_decompress_ptr cinfo, JSAMPIMAGE input_buf,
+                    JDIMENSION in_row_group_ctr, JSAMPARRAY output_buf);
+
+  /* Private state for YCC->RGB conversion */
+  int *Cr_r_tab;                /* => table for Cr to R conversion */
+  int *Cb_b_tab;                /* => table for Cb to B conversion */
+  JLONG *Cr_g_tab;              /* => table for Cr to G conversion */
+  JLONG *Cb_g_tab;              /* => table for Cb to G conversion */
+
+  /* For 2:1 vertical sampling, we produce two output rows at a time.
+   * We need a "spare" row buffer to hold the second output row if the
+   * application provides just a one-row buffer; we also use the spare
+   * to discard the dummy last row if the image height is odd.
+   */
+  JSAMPROW spare_row;
+  boolean spare_full;           /* T if spare buffer is occupied */
+
+  JDIMENSION out_row_width;     /* samples per output row */
+  JDIMENSION rows_to_go;        /* counts rows remaining in image */
+} my_merged_upsampler;
+
+typedef my_merged_upsampler *my_merged_upsample_ptr;
+
+#endif /* UPSAMPLE_MERGING_SUPPORTED */
diff --git a/jdmrg565.c b/jdmrg565.c
index d44b4abb..980a4e21 100644
--- a/jdmrg565.c
+++ b/jdmrg565.c
@@ -5,7 +5,7 @@
  * Copyright (C) 1994-1996, Thomas G. Lane.
  * libjpeg-turbo Modifications:
  * Copyright (C) 2013, Linaro Limited.
- * Copyright (C) 2014-2015, 2018, D. R. Commander.
+ * Copyright (C) 2014-2015, 2018, 2020, D. R. Commander.
  * For conditions of distribution and use, see the accompanying README.ijg
  * file.
  *
@@ -19,7 +19,7 @@ h2v1_merged_upsample_565_internal(j_decompress_ptr cinfo, JSAMPIMAGE input_buf,
                                   JDIMENSION in_row_group_ctr,
                                   JSAMPARRAY output_buf)
 {
-  my_upsample_ptr upsample = (my_upsample_ptr)cinfo->upsample;
+  my_merged_upsample_ptr upsample = (my_merged_upsample_ptr)cinfo->upsample;
   register int y, cred, cgreen, cblue;
   int cb, cr;
   register JSAMPROW outptr;
@@ -90,7 +90,7 @@ h2v1_merged_upsample_565D_internal(j_decompress_ptr cinfo,
                                    JDIMENSION in_row_group_ctr,
                                    JSAMPARRAY output_buf)
 {
-  my_upsample_ptr upsample = (my_upsample_ptr)cinfo->upsample;
+  my_merged_upsample_ptr upsample = (my_merged_upsample_ptr)cinfo->upsample;
   register int y, cred, cgreen, cblue;
   int cb, cr;
   register JSAMPROW outptr;
@@ -163,7 +163,7 @@ h2v2_merged_upsample_565_internal(j_decompress_ptr cinfo, JSAMPIMAGE input_buf,
                                   JDIMENSION in_row_group_ctr,
                                   JSAMPARRAY output_buf)
 {
-  my_upsample_ptr upsample = (my_upsample_ptr)cinfo->upsample;
+  my_merged_upsample_ptr upsample = (my_merged_upsample_ptr)cinfo->upsample;
   register int y, cred, cgreen, cblue;
   int cb, cr;
   register JSAMPROW outptr0, outptr1;
@@ -259,7 +259,7 @@ h2v2_merged_upsample_565D_internal(j_decompress_ptr cinfo,
                                    JDIMENSION in_row_group_ctr,
                                    JSAMPARRAY output_buf)
 {
-  my_upsample_ptr upsample = (my_upsample_ptr)cinfo->upsample;
+  my_merged_upsample_ptr upsample = (my_merged_upsample_ptr)cinfo->upsample;
   register int y, cred, cgreen, cblue;
   int cb, cr;
   register JSAMPROW outptr0, outptr1;
diff --git a/jdmrgext.c b/jdmrgext.c
index 7de36ebb..9bf4f1a3 100644
--- a/jdmrgext.c
+++ b/jdmrgext.c
@@ -4,7 +4,7 @@
  * This file was part of the Independent JPEG Group's software:
  * Copyright (C) 1994-1996, Thomas G. Lane.
  * libjpeg-turbo Modifications:
- * Copyright (C) 2011, 2015, D. R. Commander.
+ * Copyright (C) 2011, 2015, 2020, D. R. Commander.
  * For conditions of distribution and use, see the accompanying README.ijg
  * file.
  *
@@ -25,7 +25,7 @@ h2v1_merged_upsample_internal(j_decompress_ptr cinfo, JSAMPIMAGE input_buf,
                               JDIMENSION in_row_group_ctr,
                               JSAMPARRAY output_buf)
 {
-  my_upsample_ptr upsample = (my_upsample_ptr)cinfo->upsample;
+  my_merged_upsample_ptr upsample = (my_merged_upsample_ptr)cinfo->upsample;
   register int y, cred, cgreen, cblue;
   int cb, cr;
   register JSAMPROW outptr;
@@ -97,7 +97,7 @@ h2v2_merged_upsample_internal(j_decompress_ptr cinfo, JSAMPIMAGE input_buf,
                               JDIMENSION in_row_group_ctr,
                               JSAMPARRAY output_buf)
 {
-  my_upsample_ptr upsample = (my_upsample_ptr)cinfo->upsample;
+  my_merged_upsample_ptr upsample = (my_merged_upsample_ptr)cinfo->upsample;
   register int y, cred, cgreen, cblue;
   int cb, cr;
   register JSAMPROW outptr0, outptr1;
diff --git a/jquant2.c b/jquant2.c
index b0fa8e9e..44efb18c 100644
--- a/jquant2.c
+++ b/jquant2.c
@@ -4,7 +4,7 @@
  * This file was part of the Independent JPEG Group's software:
  * Copyright (C) 1991-1996, Thomas G. Lane.
  * libjpeg-turbo Modifications:
- * Copyright (C) 2009, 2014-2015, D. R. Commander.
+ * Copyright (C) 2009, 2014-2015, 2020, D. R. Commander.
  * For conditions of distribution and use, see the accompanying README.ijg
  * file.
  *
@@ -1145,7 +1145,7 @@ start_pass_2_quant(j_decompress_ptr cinfo, boolean is_pre_scan)
   int i;
 
   /* Only F-S dithering or no dithering is supported. */
-  /* If user asks for ordered dither, give him F-S. */
+  /* If user asks for ordered dither, give them F-S. */
   if (cinfo->dither_mode != JDITHER_NONE)
     cinfo->dither_mode = JDITHER_FS;
 
@@ -1263,7 +1263,7 @@ jinit_2pass_quantizer(j_decompress_ptr cinfo)
     cquantize->sv_colormap = NULL;
 
   /* Only F-S dithering or no dithering is supported. */
-  /* If user asks for ordered dither, give him F-S. */
+  /* If user asks for ordered dither, give them F-S. */
   if (cinfo->dither_mode != JDITHER_NONE)
     cinfo->dither_mode = JDITHER_FS;
 
diff --git a/libjpeg.txt b/libjpeg.txt
index c50cf906..c233ecbd 100644
--- a/libjpeg.txt
+++ b/libjpeg.txt
@@ -3,7 +3,7 @@ USING THE IJG JPEG LIBRARY
 This file was part of the Independent JPEG Group's software:
 Copyright (C) 1994-2013, Thomas G. Lane, Guido Vollbeding.
 libjpeg-turbo Modifications:
-Copyright (C) 2010, 2014-2018, D. R. Commander.
+Copyright (C) 2010, 2014-2018, 2020, D. R. Commander.
 Copyright (C) 2015, Google, Inc.
 For conditions of distribution and use, see the accompanying README.ijg file.
 
@@ -750,7 +750,9 @@ multiple rows in the JPEG image.
 
 Suspending data sources are not supported by this function.  Calling
 jpeg_skip_scanlines() with a suspending data source will result in undefined
-behavior.
+behavior.  Two-pass color quantization is also not supported by this function.
+Calling jpeg_skip_scanlines() with two-pass color quantization enabled will
+result in an error.
 
 jpeg_skip_scanlines() will not allow skipping past the bottom of the image.  If
 the value of num_lines is large enough to skip past the bottom of the image,
diff --git a/turbojpeg-jni.c b/turbojpeg-jni.c
index 93634501..1b728e3a 100644
--- a/turbojpeg-jni.c
+++ b/turbojpeg-jni.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (C)2011-2019 D. R. Commander.  All Rights Reserved.
+ * Copyright (C)2011-2020 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:
@@ -326,9 +326,11 @@ JNIEXPORT jint JNICALL Java_org_libjpegturbo_turbojpeg_TJCompressor_compressFrom
   tjhandle handle = 0;
   unsigned long jpegSize = 0;
   jbyteArray jSrcPlanes[3] = { NULL, NULL, NULL };
-  const unsigned char *srcPlanes[3];
+  const unsigned char *srcPlanesTmp[3] = { NULL, NULL, NULL };
+  const unsigned char *srcPlanes[3] = { NULL, NULL, NULL };
+  int *srcOffsetsTmp = NULL, srcOffsets[3] = { 0, 0, 0 };
+  int *srcStridesTmp = NULL, srcStrides[3] = { 0, 0, 0 };
   unsigned char *jpegBuf = NULL;
-  int *srcOffsets = NULL, *srcStrides = NULL;
   int nc = (subsamp == org_libjpegturbo_turbojpeg_TJ_SAMP_GRAY ? 1 : 3), i;
 
   GET_HANDLE();
@@ -351,56 +353,49 @@ JNIEXPORT jint JNICALL Java_org_libjpegturbo_turbojpeg_TJCompressor_compressFrom
 
   if (ProcessSystemProperties(env) < 0) goto bailout;
 
-#define RELEASE_ARRAYS_COMPRESSFROMYUV() { \
-  SAFE_RELEASE(dst, jpegBuf); \
-  for (i = 0; i < nc; i++) \
-    SAFE_RELEASE(jSrcPlanes[i], srcPlanes[i]); \
-  SAFE_RELEASE(jSrcStrides, srcStrides); \
-  SAFE_RELEASE(jSrcOffsets, srcOffsets); \
-}
+  BAILIF0(srcOffsetsTmp =
+          (*env)->GetPrimitiveArrayCritical(env, jSrcOffsets, 0));
+  for (i = 0; i < nc; i++) srcOffsets[i] = srcOffsetsTmp[i];
+  SAFE_RELEASE(jSrcOffsets, srcOffsetsTmp);
+
+  BAILIF0(srcStridesTmp =
+          (*env)->GetPrimitiveArrayCritical(env, jSrcStrides, 0));
+  for (i = 0; i < nc; i++) srcStrides[i] = srcStridesTmp[i];
+  SAFE_RELEASE(jSrcStrides, srcStridesTmp);
 
-  BAILIF0(srcOffsets = (*env)->GetPrimitiveArrayCritical(env, jSrcOffsets, 0));
-  BAILIF0(srcStrides = (*env)->GetPrimitiveArrayCritical(env, jSrcStrides, 0));
   for (i = 0; i < nc; i++) {
     int planeSize = tjPlaneSizeYUV(i, width, srcStrides[i], height, subsamp);
     int pw = tjPlaneWidth(i, width, subsamp);
 
-    if (planeSize < 0 || pw < 0) {
-      RELEASE_ARRAYS_COMPRESSFROMYUV();
+    if (planeSize < 0 || pw < 0)
       THROW_ARG(tjGetErrorStr());
-    }
 
-    if (srcOffsets[i] < 0) {
-      RELEASE_ARRAYS_COMPRESSFROMYUV();
+    if (srcOffsets[i] < 0)
       THROW_ARG("Invalid argument in compressFromYUV()");
-    }
-    if (srcStrides[i] < 0 && srcOffsets[i] - planeSize + pw < 0) {
-      RELEASE_ARRAYS_COMPRESSFROMYUV();
+    if (srcStrides[i] < 0 && srcOffsets[i] - planeSize + pw < 0)
       THROW_ARG("Negative plane stride would cause memory to be accessed below plane boundary");
-    }
 
     BAILIF0(jSrcPlanes[i] = (*env)->GetObjectArrayElement(env, srcobjs, i));
     if ((*env)->GetArrayLength(env, jSrcPlanes[i]) <
-        srcOffsets[i] + planeSize) {
-      RELEASE_ARRAYS_COMPRESSFROMYUV();
+        srcOffsets[i] + planeSize)
       THROW_ARG("Source plane is not large enough");
-    }
 
-    BAILIF0(srcPlanes[i] =
+    BAILIF0(srcPlanesTmp[i] =
             (*env)->GetPrimitiveArrayCritical(env, jSrcPlanes[i], 0));
-    srcPlanes[i] = &srcPlanes[i][srcOffsets[i]];
+    srcPlanes[i] = &srcPlanesTmp[i][srcOffsets[i]];
+    SAFE_RELEASE(jSrcPlanes[i], srcPlanesTmp[i]);
   }
   BAILIF0(jpegBuf = (*env)->GetPrimitiveArrayCritical(env, dst, 0));
 
   if (tjCompressFromYUVPlanes(handle, srcPlanes, width, srcStrides, height,
                               subsamp, &jpegBuf, &jpegSize, jpegQual,
                               flags | TJFLAG_NOREALLOC) == -1) {
-    RELEASE_ARRAYS_COMPRESSFROMYUV();
+    SAFE_RELEASE(dst, jpegBuf);
     THROW_TJ();
   }
 
 bailout:
-  RELEASE_ARRAYS_COMPRESSFROMYUV();
+  SAFE_RELEASE(dst, jpegBuf);
   return (jint)jpegSize;
 }
 
@@ -411,9 +406,12 @@ static void TJCompressor_encodeYUV
 {
   tjhandle handle = 0;
   jsize arraySize = 0, actualPitch;
+  unsigned char *srcBuf = NULL;
   jbyteArray jDstPlanes[3] = { NULL, NULL, NULL };
-  unsigned char *srcBuf = NULL, *dstPlanes[3];
-  int *dstOffsets = NULL, *dstStrides = NULL;
+  unsigned char *dstPlanesTmp[3] = { NULL, NULL, NULL };
+  unsigned char *dstPlanes[3] = { NULL, NULL, NULL };
+  int *dstOffsetsTmp = NULL, dstOffsets[3] = { 0, 0, 0 };
+  int *dstStridesTmp = NULL, dstStrides[3] = { 0, 0, 0 };
   int nc = (subsamp == org_libjpegturbo_turbojpeg_TJ_SAMP_GRAY ? 1 : 3), i;
 
   GET_HANDLE();
@@ -438,56 +436,49 @@ static void TJCompressor_encodeYUV
   if ((*env)->GetArrayLength(env, src) * srcElementSize < arraySize)
     THROW_ARG("Source buffer is not large enough");
 
-#define RELEASE_ARRAYS_ENCODEYUV() { \
-  SAFE_RELEASE(src, srcBuf); \
-  for (i = 0; i < nc; i++) \
-    SAFE_RELEASE(jDstPlanes[i], dstPlanes[i]); \
-  SAFE_RELEASE(jDstStrides, dstStrides); \
-  SAFE_RELEASE(jDstOffsets, dstOffsets); \
-}
+  BAILIF0(dstOffsetsTmp =
+          (*env)->GetPrimitiveArrayCritical(env, jDstOffsets, 0));
+  for (i = 0; i < nc; i++) dstOffsets[i] = dstOffsetsTmp[i];
+  SAFE_RELEASE(jDstOffsets, dstOffsetsTmp);
+
+  BAILIF0(dstStridesTmp =
+          (*env)->GetPrimitiveArrayCritical(env, jDstStrides, 0));
+  for (i = 0; i < nc; i++) dstStrides[i] = dstStridesTmp[i];
+  SAFE_RELEASE(jDstStrides, dstStridesTmp);
 
-  BAILIF0(dstOffsets = (*env)->GetPrimitiveArrayCritical(env, jDstOffsets, 0));
-  BAILIF0(dstStrides = (*env)->GetPrimitiveArrayCritical(env, jDstStrides, 0));
   for (i = 0; i < nc; i++) {
     int planeSize = tjPlaneSizeYUV(i, width, dstStrides[i], height, subsamp);
     int pw = tjPlaneWidth(i, width, subsamp);
 
-    if (planeSize < 0 || pw < 0) {
-      RELEASE_ARRAYS_ENCODEYUV();
+    if (planeSize < 0 || pw < 0)
       THROW_ARG(tjGetErrorStr());
-    }
 
-    if (dstOffsets[i] < 0) {
-      RELEASE_ARRAYS_ENCODEYUV();
+    if (dstOffsets[i] < 0)
       THROW_ARG("Invalid argument in encodeYUV()");
-    }
-    if (dstStrides[i] < 0 && dstOffsets[i] - planeSize + pw < 0) {
-      RELEASE_ARRAYS_ENCODEYUV();
+    if (dstStrides[i] < 0 && dstOffsets[i] - planeSize + pw < 0)
       THROW_ARG("Negative plane stride would cause memory to be accessed below plane boundary");
-    }
 
     BAILIF0(jDstPlanes[i] = (*env)->GetObjectArrayElement(env, dstobjs, i));
     if ((*env)->GetArrayLength(env, jDstPlanes[i]) <
-        dstOffsets[i] + planeSize) {
-      RELEASE_ARRAYS_ENCODEYUV();
+        dstOffsets[i] + planeSize)
       THROW_ARG("Destination plane is not large enough");
-    }
 
-    BAILIF0(dstPlanes[i] =
+    BAILIF0(dstPlanesTmp[i] =
             (*env)->GetPrimitiveArrayCritical(env, jDstPlanes[i], 0));
-    dstPlanes[i] = &dstPlanes[i][dstOffsets[i]];
+    dstPlanes[i] = &dstPlanesTmp[i][dstOffsets[i]];
+    SAFE_RELEASE(jDstPlanes[i], dstPlanesTmp[i]);
   }
   BAILIF0(srcBuf = (*env)->GetPrimitiveArrayCritical(env, src, 0));
 
   if (tjEncodeYUVPlanes(handle, &srcBuf[y * actualPitch + x * tjPixelSize[pf]],
                         width, pitch, height, pf, dstPlanes, dstStrides,
                         subsamp, flags) == -1) {
-    RELEASE_ARRAYS_ENCODEYUV();
+    SAFE_RELEASE(src, srcBuf);
     THROW_TJ();
   }
 
 bailout:
-  RELEASE_ARRAYS_ENCODEYUV();
+  SAFE_RELEASE(src, srcBuf);
 }
 
 /* TurboJPEG 1.4.x: TJCompressor::encodeYUV() byte source */
@@ -785,9 +776,12 @@ JNIEXPORT void JNICALL Java_org_libjpegturbo_turbojpeg_TJDecompressor_decompress
    jintArray jDstStrides, jint desiredHeight, jint flags)
 {
   tjhandle handle = 0;
+  unsigned char *jpegBuf = NULL;
   jbyteArray jDstPlanes[3] = { NULL, NULL, NULL };
-  unsigned char *jpegBuf = NULL, *dstPlanes[3];
-  int *dstOffsets = NULL, *dstStrides = NULL;
+  unsigned char *dstPlanesTmp[3] = { NULL, NULL, NULL };
+  unsigned char *dstPlanes[3] = { NULL, NULL, NULL };
+  int *dstOffsetsTmp = NULL, dstOffsets[3] = { 0, 0, 0 };
+  int *dstStridesTmp = NULL, dstStrides[3] = { 0, 0, 0 };
   int jpegSubsamp = -1, jpegWidth = 0, jpegHeight = 0;
   int nc = 0, i, width, height, scaledWidth, scaledHeight, nsf = 0;
   tjscalingfactor *sf;
@@ -821,57 +815,50 @@ JNIEXPORT void JNICALL Java_org_libjpegturbo_turbojpeg_TJDecompressor_decompress
   if (i >= nsf)
     THROW_ARG("Could not scale down to desired image dimensions");
 
-#define RELEASE_ARRAYS_DECOMPRESSTOYUV() { \
-  SAFE_RELEASE(src, jpegBuf); \
-  for (i = 0; i < nc; i++) \
-    SAFE_RELEASE(jDstPlanes[i], dstPlanes[i]); \
-  SAFE_RELEASE(jDstStrides, dstStrides); \
-  SAFE_RELEASE(jDstOffsets, dstOffsets); \
-}
+  BAILIF0(dstOffsetsTmp =
+          (*env)->GetPrimitiveArrayCritical(env, jDstOffsets, 0));
+  for (i = 0; i < nc; i++) dstOffsets[i] = dstOffsetsTmp[i];
+  SAFE_RELEASE(jDstOffsets, dstOffsetsTmp);
+
+  BAILIF0(dstStridesTmp =
+          (*env)->GetPrimitiveArrayCritical(env, jDstStrides, 0));
+  for (i = 0; i < nc; i++) dstStrides[i] = dstStridesTmp[i];
+  SAFE_RELEASE(jDstStrides, dstStridesTmp);
 
-  BAILIF0(dstOffsets = (*env)->GetPrimitiveArrayCritical(env, jDstOffsets, 0));
-  BAILIF0(dstStrides = (*env)->GetPrimitiveArrayCritical(env, jDstStrides, 0));
   for (i = 0; i < nc; i++) {
     int planeSize = tjPlaneSizeYUV(i, scaledWidth, dstStrides[i], scaledHeight,
                                    jpegSubsamp);
     int pw = tjPlaneWidth(i, scaledWidth, jpegSubsamp);
 
-    if (planeSize < 0 || pw < 0) {
-      RELEASE_ARRAYS_DECOMPRESSTOYUV();
+    if (planeSize < 0 || pw < 0)
       THROW_ARG(tjGetErrorStr());
-    }
 
-    if (dstOffsets[i] < 0) {
-      RELEASE_ARRAYS_DECOMPRESSTOYUV();
+    if (dstOffsets[i] < 0)
       THROW_ARG("Invalid argument in decompressToYUV()");
-    }
-    if (dstStrides[i] < 0 && dstOffsets[i] - planeSize + pw < 0) {
-      RELEASE_ARRAYS_DECOMPRESSTOYUV();
+    if (dstStrides[i] < 0 && dstOffsets[i] - planeSize + pw < 0)
       THROW_ARG("Negative plane stride would cause memory to be accessed below plane boundary");
-    }
 
     BAILIF0(jDstPlanes[i] = (*env)->GetObjectArrayElement(env, dstobjs, i));
     if ((*env)->GetArrayLength(env, jDstPlanes[i]) <
-        dstOffsets[i] + planeSize) {
-      RELEASE_ARRAYS_DECOMPRESSTOYUV();
+        dstOffsets[i] + planeSize)
       THROW_ARG("Destination plane is not large enough");
-    }
 
-    BAILIF0(dstPlanes[i] =
+    BAILIF0(dstPlanesTmp[i] =
             (*env)->GetPrimitiveArrayCritical(env, jDstPlanes[i], 0));
-    dstPlanes[i] = &dstPlanes[i][dstOffsets[i]];
+    dstPlanes[i] = &dstPlanesTmp[i][dstOffsets[i]];
+    SAFE_RELEASE(jDstPlanes[i], dstPlanesTmp[i]);
   }
   BAILIF0(jpegBuf = (*env)->GetPrimitiveArrayCritical(env, src, 0));
 
   if (tjDecompressToYUVPlanes(handle, jpegBuf, (unsigned long)jpegSize,
                               dstPlanes, desiredWidth, dstStrides,
                               desiredHeight, flags) == -1) {
-    RELEASE_ARRAYS_DECOMPRESSTOYUV();
+    SAFE_RELEASE(src, jpegBuf);
     THROW_TJ();
   }
 
 bailout:
-  RELEASE_ARRAYS_DECOMPRESSTOYUV();
+  SAFE_RELEASE(src, jpegBuf);
 }
 
 /* TurboJPEG 1.2.x: TJDecompressor::decompressToYUV() */
@@ -920,9 +907,11 @@ static void TJDecompressor_decodeYUV
   tjhandle handle = 0;
   jsize arraySize = 0, actualPitch;
   jbyteArray jSrcPlanes[3] = { NULL, NULL, NULL };
-  const unsigned char *srcPlanes[3];
+  const unsigned char *srcPlanesTmp[3] = { NULL, NULL, NULL };
+  const unsigned char *srcPlanes[3] = { NULL, NULL, NULL };
+  int *srcOffsetsTmp = NULL, srcOffsets[3] = { 0, 0, 0 };
+  int *srcStridesTmp = NULL, srcStrides[3] = { 0, 0, 0 };
   unsigned char *dstBuf = NULL;
-  int *srcOffsets = NULL, *srcStrides = NULL;
   int nc = (subsamp == org_libjpegturbo_turbojpeg_TJ_SAMP_GRAY ? 1 : 3), i;
 
   GET_HANDLE();
@@ -946,56 +935,49 @@ static void TJDecompressor_decodeYUV
   if ((*env)->GetArrayLength(env, dst) * dstElementSize < arraySize)
     THROW_ARG("Destination buffer is not large enough");
 
-#define RELEASE_ARRAYS_DECODEYUV() { \
-  SAFE_RELEASE(dst, dstBuf); \
-  for (i = 0; i < nc; i++) \
-    SAFE_RELEASE(jSrcPlanes[i], srcPlanes[i]); \
-  SAFE_RELEASE(jSrcStrides, srcStrides); \
-  SAFE_RELEASE(jSrcOffsets, srcOffsets); \
-}
+  BAILIF0(srcOffsetsTmp =
+          (*env)->GetPrimitiveArrayCritical(env, jSrcOffsets, 0));
+  for (i = 0; i < nc; i++) srcOffsets[i] = srcOffsetsTmp[i];
+  SAFE_RELEASE(jSrcOffsets, srcOffsetsTmp);
+
+  BAILIF0(srcStridesTmp =
+          (*env)->GetPrimitiveArrayCritical(env, jSrcStrides, 0));
+  for (i = 0; i < nc; i++) srcStrides[i] = srcStridesTmp[i];
+  SAFE_RELEASE(jSrcStrides, srcStridesTmp);
 
-  BAILIF0(srcOffsets = (*env)->GetPrimitiveArrayCritical(env, jSrcOffsets, 0));
-  BAILIF0(srcStrides = (*env)->GetPrimitiveArrayCritical(env, jSrcStrides, 0));
   for (i = 0; i < nc; i++) {
     int planeSize = tjPlaneSizeYUV(i, width, srcStrides[i], height, subsamp);
     int pw = tjPlaneWidth(i, width, subsamp);
 
-    if (planeSize < 0 || pw < 0) {
-      RELEASE_ARRAYS_DECODEYUV();
+    if (planeSize < 0 || pw < 0)
       THROW_ARG(tjGetErrorStr());
-    }
 
-    if (srcOffsets[i] < 0) {
-      RELEASE_ARRAYS_DECODEYUV();
+    if (srcOffsets[i] < 0)
       THROW_ARG("Invalid argument in decodeYUV()");
-    }
-    if (srcStrides[i] < 0 && srcOffsets[i] - planeSize + pw < 0) {
-      RELEASE_ARRAYS_DECODEYUV();
+    if (srcStrides[i] < 0 && srcOffsets[i] - planeSize + pw < 0)
       THROW_ARG("Negative plane stride would cause memory to be accessed below plane boundary");
-    }
 
     BAILIF0(jSrcPlanes[i] = (*env)->GetObjectArrayElement(env, srcobjs, i));
     if ((*env)->GetArrayLength(env, jSrcPlanes[i]) <
-        srcOffsets[i] + planeSize) {
-      RELEASE_ARRAYS_DECODEYUV();
+        srcOffsets[i] + planeSize)
       THROW_ARG("Source plane is not large enough");
-    }
 
-    BAILIF0(srcPlanes[i] =
+    BAILIF0(srcPlanesTmp[i] =
             (*env)->GetPrimitiveArrayCritical(env, jSrcPlanes[i], 0));
-    srcPlanes[i] = &srcPlanes[i][srcOffsets[i]];
+    srcPlanes[i] = &srcPlanesTmp[i][srcOffsets[i]];
+    SAFE_RELEASE(jSrcPlanes[i], srcPlanesTmp[i]);
   }
   BAILIF0(dstBuf = (*env)->GetPrimitiveArrayCritical(env, dst, 0));
 
   if (tjDecodeYUVPlanes(handle, srcPlanes, srcStrides, subsamp,
                         &dstBuf[y * actualPitch + x * tjPixelSize[pf]], width,
                         pitch, height, pf, flags) == -1) {
-    RELEASE_ARRAYS_DECODEYUV();
+    SAFE_RELEASE(dst, dstBuf);
     THROW_TJ();
   }
 
 bailout:
-  RELEASE_ARRAYS_DECODEYUV();
+  SAFE_RELEASE(dst, dstBuf);
 }
 
 /* TurboJPEG 1.4.x: TJDecompressor::decodeYUV() byte destination */