From 94b15d9879608e4c1bc763d204736841f4f2bde7 Mon Sep 17 00:00:00 2001
From: Dirk Farin <dirk.farin@gmail.com>
Date: Tue, 29 Oct 2024 12:18:27 +0100
Subject: [PATCH] unci: fix tests for 16bit YCbCr 4:2:2 (#1256)

---
 tests/uncompressed_decode_ycbcr422.cc | 494 +++++++++-----------------
 1 file changed, 168 insertions(+), 326 deletions(-)

diff --git a/tests/uncompressed_decode_ycbcr422.cc b/tests/uncompressed_decode_ycbcr422.cc
index 8baa983130..abcb399cdf 100644
--- a/tests/uncompressed_decode_ycbcr422.cc
+++ b/tests/uncompressed_decode_ycbcr422.cc
@@ -457,379 +457,221 @@ void check_image_content_ycbcr422_16bit(struct heif_context *&context) {
   heif_image *img = get_primary_image_ycbcr(handle, heif_chroma_422);
 
   int stride;
-  const uint8_t *img_plane =
-      heif_image_get_plane_readonly(img, heif_channel_Y, &stride);
+  const uint16_t *img_plane =
+      (const uint16_t*)heif_image_get_plane_readonly(img, heif_channel_Y, &stride);
   REQUIRE(stride == 128);
+  stride /= 2;
   for (int row = 0; row < 4; row++) {
     INFO("row: " << row);
-    REQUIRE(((int)(img_plane[stride * row + 0])) == 0x8A);
-    REQUIRE(((int)(img_plane[stride * row + 1])) == 0x4C);
-    REQUIRE(((int)(img_plane[stride * row + 2])) == 0x8A);
-    REQUIRE(((int)(img_plane[stride * row + 3])) == 0x4C);
-    REQUIRE(((int)(img_plane[stride * row + 4])) == 0x8A);
-    REQUIRE(((int)(img_plane[stride * row + 5])) == 0x4C);
-    REQUIRE(((int)(img_plane[stride * row + 6])) == 0x8A);
-    REQUIRE(((int)(img_plane[stride * row + 7])) == 0x4C);
-    REQUIRE(((int)(img_plane[stride * row + 8])) == 0x6D);
-    REQUIRE(((int)(img_plane[stride * row + 9])) == 0x4B);
-    REQUIRE(((int)(img_plane[stride * row + 10])) == 0x6D);
-    REQUIRE(((int)(img_plane[stride * row + 11])) == 0x4B);
-    REQUIRE(((int)(img_plane[stride * row + 12])) == 0x6D);
-    REQUIRE(((int)(img_plane[stride * row + 13])) == 0x4B);
-    REQUIRE(((int)(img_plane[stride * row + 14])) == 0x6D);
-    REQUIRE(((int)(img_plane[stride * row + 15])) == 0x4B);
-    REQUIRE(((int)(img_plane[stride * row + 16])) == 0x2E);
-    REQUIRE(((int)(img_plane[stride * row + 17])) == 0x1D);
-    REQUIRE(((int)(img_plane[stride * row + 18])) == 0x2E);
-    REQUIRE(((int)(img_plane[stride * row + 19])) == 0x1D);
-    REQUIRE(((int)(img_plane[stride * row + 20])) == 0x2E);
-    REQUIRE(((int)(img_plane[stride * row + 21])) == 0x1D);
-    REQUIRE(((int)(img_plane[stride * row + 22])) == 0x2E);
-    REQUIRE(((int)(img_plane[stride * row + 23])) == 0x1D);
-    REQUIRE(((int)(img_plane[stride * row + 24])) == 0xFE);
-    REQUIRE(((int)(img_plane[stride * row + 25])) == 0xFF);
-    REQUIRE(((int)(img_plane[stride * row + 26])) == 0xFE);
-    REQUIRE(((int)(img_plane[stride * row + 27])) == 0xFF);
-    REQUIRE(((int)(img_plane[stride * row + 28])) == 0xFE);
-    REQUIRE(((int)(img_plane[stride * row + 29])) == 0xFF);
-    REQUIRE(((int)(img_plane[stride * row + 30])) == 0xFE);
-    REQUIRE(((int)(img_plane[stride * row + 31])) == 0xFF);
-    REQUIRE(((int)(img_plane[stride * row + 32])) == 0x00);
-    REQUIRE(((int)(img_plane[stride * row + 33])) == 0x00);
-    REQUIRE(((int)(img_plane[stride * row + 34])) == 0x00);
-    REQUIRE(((int)(img_plane[stride * row + 35])) == 0x00);
-    REQUIRE(((int)(img_plane[stride * row + 36])) == 0x00);
-    REQUIRE(((int)(img_plane[stride * row + 37])) == 0x00);
-    REQUIRE(((int)(img_plane[stride * row + 38])) == 0x00);
-    REQUIRE(((int)(img_plane[stride * row + 39])) == 0x00);
-    REQUIRE(((int)(img_plane[stride * row + 40])) == 0xD0);
-    REQUIRE(((int)(img_plane[stride * row + 41])) == 0xE2);
-    REQUIRE(((int)(img_plane[stride * row + 42])) == 0xD0);
-    REQUIRE(((int)(img_plane[stride * row + 43])) == 0xE2);
-    REQUIRE(((int)(img_plane[stride * row + 44])) == 0xD0);
-    REQUIRE(((int)(img_plane[stride * row + 45])) == 0xE2);
-    REQUIRE(((int)(img_plane[stride * row + 46])) == 0xD0);
-    REQUIRE(((int)(img_plane[stride * row + 47])) == 0xE2);
-    REQUIRE(((int)(img_plane[stride * row + 48])) == 0x74);
-    REQUIRE(((int)(img_plane[stride * row + 49])) == 0xB3);
-    REQUIRE(((int)(img_plane[stride * row + 50])) == 0x74);
-    REQUIRE(((int)(img_plane[stride * row + 51])) == 0xB3);
-    REQUIRE(((int)(img_plane[stride * row + 52])) == 0x74);
-    REQUIRE(((int)(img_plane[stride * row + 53])) == 0xB3);
-    REQUIRE(((int)(img_plane[stride * row + 54])) == 0x74);
-    REQUIRE(((int)(img_plane[stride * row + 55])) == 0xB3);
-    REQUIRE(((int)(img_plane[stride * row + 56])) == 0x80);
-    REQUIRE(((int)(img_plane[stride * row + 57])) == 0x80);
-    REQUIRE(((int)(img_plane[stride * row + 59])) == 0x80);
-    REQUIRE(((int)(img_plane[stride * row + 59])) == 0x80);
-    REQUIRE(((int)(img_plane[stride * row + 60])) == 0x80);
-    REQUIRE(((int)(img_plane[stride * row + 61])) == 0x80);
-    REQUIRE(((int)(img_plane[stride * row + 62])) == 0x80);
-    REQUIRE(((int)(img_plane[stride * row + 63])) == 0x80);
+    REQUIRE(((int)(img_plane[stride * row + 0])) == 0x4C8A);
+    REQUIRE(((int)(img_plane[stride * row + 1])) == 0x4C8A);
+    REQUIRE(((int)(img_plane[stride * row + 2])) == 0x4C8A);
+    REQUIRE(((int)(img_plane[stride * row + 3])) == 0x4C8A);
+    REQUIRE(((int)(img_plane[stride * row + 4])) == 0x4B6D);
+    REQUIRE(((int)(img_plane[stride * row + 5])) == 0x4B6D);
+    REQUIRE(((int)(img_plane[stride * row + 6])) == 0x4B6D);
+    REQUIRE(((int)(img_plane[stride * row + 7])) == 0x4B6D);
+    REQUIRE(((int)(img_plane[stride * row + 8])) == 0x1D2E);
+    REQUIRE(((int)(img_plane[stride * row + 9])) == 0x1D2E);
+    REQUIRE(((int)(img_plane[stride * row + 10])) == 0x1D2E);
+    REQUIRE(((int)(img_plane[stride * row + 11])) == 0x1D2E);
+    REQUIRE(((int)(img_plane[stride * row + 12])) == 0xFFFE);
+    REQUIRE(((int)(img_plane[stride * row + 13])) == 0xFFFE);
+    REQUIRE(((int)(img_plane[stride * row + 14])) == 0xFFFE);
+    REQUIRE(((int)(img_plane[stride * row + 15])) == 0xFFFE);
+    REQUIRE(((int)(img_plane[stride * row + 16])) == 0x0000);
+    REQUIRE(((int)(img_plane[stride * row + 17])) == 0x0000);
+    REQUIRE(((int)(img_plane[stride * row + 18])) == 0x0000);
+    REQUIRE(((int)(img_plane[stride * row + 19])) == 0x0000);
+    REQUIRE(((int)(img_plane[stride * row + 20])) == 0xE2D0);
+    REQUIRE(((int)(img_plane[stride * row + 21])) == 0xE2D0);
+    REQUIRE(((int)(img_plane[stride * row + 22])) == 0xE2D0);
+    REQUIRE(((int)(img_plane[stride * row + 23])) == 0xE2D0);
+    REQUIRE(((int)(img_plane[stride * row + 24])) == 0xB374);
+    REQUIRE(((int)(img_plane[stride * row + 25])) == 0xB374);
+    REQUIRE(((int)(img_plane[stride * row + 26])) == 0xB374);
+    REQUIRE(((int)(img_plane[stride * row + 27])) == 0xB374);
+    REQUIRE(((int)(img_plane[stride * row + 28])) == 0x8080);
+    REQUIRE(((int)(img_plane[stride * row + 29])) == 0x8080);
+    REQUIRE(((int)(img_plane[stride * row + 30])) == 0x8080);
+    REQUIRE(((int)(img_plane[stride * row + 31])) == 0x8080);
   }
   for (int row = 4; row < 8; row++) {
     INFO("row: " << row);
-    REQUIRE(((int)(img_plane[stride * row + 0])) == 0x6D);
-    REQUIRE(((int)(img_plane[stride * row + 3])) == 0x4B);
-    REQUIRE(((int)(img_plane[stride * row + 4])) == 0x6D);
-    REQUIRE(((int)(img_plane[stride * row + 7])) == 0x4B);
-    REQUIRE(((int)(img_plane[stride * row + 8])) == 0x2E);
-    REQUIRE(((int)(img_plane[stride * row + 15])) == 0x1D);
-    REQUIRE(((int)(img_plane[stride * row + 16])) == 0xFE);
-    REQUIRE(((int)(img_plane[stride * row + 23])) == 0xFF);
-    REQUIRE(((int)(img_plane[stride * row + 24])) == 0x00);
-    REQUIRE(((int)(img_plane[stride * row + 31])) == 0x00);
-    REQUIRE(((int)(img_plane[stride * row + 32])) == 0xD0);
-    REQUIRE(((int)(img_plane[stride * row + 39])) == 0xE2);
-    REQUIRE(((int)(img_plane[stride * row + 40])) == 0x74);
-    REQUIRE(((int)(img_plane[stride * row + 47])) == 0xB3);
-    REQUIRE(((int)(img_plane[stride * row + 48])) == 0x80);
-    REQUIRE(((int)(img_plane[stride * row + 55])) == 0x80);
-    REQUIRE(((int)(img_plane[stride * row + 56])) == 0xC6);
-    REQUIRE(((int)(img_plane[stride * row + 63])) == 0xAD);
+    REQUIRE(((int)(img_plane[stride * row + 0])) == 0x4B6D);
+    REQUIRE(((int)(img_plane[stride * row + 2])) == 0x4B6D);
+    REQUIRE(((int)(img_plane[stride * row + 4])) == 0x1D2E);
+    REQUIRE(((int)(img_plane[stride * row + 8])) == 0xFFFE);
+    REQUIRE(((int)(img_plane[stride * row + 12])) == 0x0000);
+    REQUIRE(((int)(img_plane[stride * row + 16])) == 0xE2D0);
+    REQUIRE(((int)(img_plane[stride * row + 20])) == 0xB374);
+    REQUIRE(((int)(img_plane[stride * row + 24])) == 0x8080);
+    REQUIRE(((int)(img_plane[stride * row + 28])) == 0xADC6);
   }
   for (int row = 8; row < 12; row++) {
     INFO("row: " << row);
-    REQUIRE(((int)(img_plane[stride * row + 0])) == 0x2E);
-    REQUIRE(((int)(img_plane[stride * row + 7])) == 0x1D);
-    REQUIRE(((int)(img_plane[stride * row + 8])) == 0xFE);
-    REQUIRE(((int)(img_plane[stride * row + 15])) == 0xFF);
-    REQUIRE(((int)(img_plane[stride * row + 16])) == 0x00);
-    REQUIRE(((int)(img_plane[stride * row + 23])) == 0x00);
-    REQUIRE(((int)(img_plane[stride * row + 24])) == 0xD0);
-    REQUIRE(((int)(img_plane[stride * row + 31])) == 0xE2);
-    REQUIRE(((int)(img_plane[stride * row + 32])) == 0x74);
-    REQUIRE(((int)(img_plane[stride * row + 39])) == 0xB3);
-    REQUIRE(((int)(img_plane[stride * row + 40])) == 0x80);
-    REQUIRE(((int)(img_plane[stride * row + 47])) == 0x80);
-    REQUIRE(((int)(img_plane[stride * row + 48])) == 0xC6);
-    REQUIRE(((int)(img_plane[stride * row + 55])) == 0xAD);
-    REQUIRE(((int)(img_plane[stride * row + 56])) == 0x49);
-    REQUIRE(((int)(img_plane[stride * row + 63])) == 0xAF);
+    REQUIRE(((int)(img_plane[stride * row + 0])) == 0x1D2E);
+    REQUIRE(((int)(img_plane[stride * row + 4])) == 0xFFFE);
+    REQUIRE(((int)(img_plane[stride * row + 8])) == 0x0000);
+    REQUIRE(((int)(img_plane[stride * row + 12])) == 0xE2D0);
+    REQUIRE(((int)(img_plane[stride * row + 16])) == 0xB374);
+    REQUIRE(((int)(img_plane[stride * row + 20])) == 0x8080);
+    REQUIRE(((int)(img_plane[stride * row + 24])) == 0xADC6);
+    REQUIRE(((int)(img_plane[stride * row + 28])) == 0xAF49);
   }
   for (int row = 12; row < 16; row++) {
     INFO("row: " << row);
-    REQUIRE(((int)(img_plane[stride * row + 0])) == 0xFE);
-    REQUIRE(((int)(img_plane[stride * row + 7])) == 0xFF);
-    REQUIRE(((int)(img_plane[stride * row + 8])) == 0x00);
-    REQUIRE(((int)(img_plane[stride * row + 15])) == 0x00);
-    REQUIRE(((int)(img_plane[stride * row + 16])) == 0xD0);
-    REQUIRE(((int)(img_plane[stride * row + 23])) == 0xE2);
-    REQUIRE(((int)(img_plane[stride * row + 24])) == 0x74);
-    REQUIRE(((int)(img_plane[stride * row + 31])) == 0xB3);
-    REQUIRE(((int)(img_plane[stride * row + 32])) == 0x80);
-    REQUIRE(((int)(img_plane[stride * row + 39])) == 0x80);
-    REQUIRE(((int)(img_plane[stride * row + 40])) == 0xC6);
-    REQUIRE(((int)(img_plane[stride * row + 47])) == 0xAD);
-    REQUIRE(((int)(img_plane[stride * row + 48])) == 0x49);
-    REQUIRE(((int)(img_plane[stride * row + 55])) == 0xAF);
-    REQUIRE(((int)(img_plane[stride * row + 56])) == 0x8A);
-    REQUIRE(((int)(img_plane[stride * row + 63])) == 0x4C);
+    REQUIRE(((int)(img_plane[stride * row + 0])) == 0xFFFE);
+    REQUIRE(((int)(img_plane[stride * row + 4])) == 0x0000);
+    REQUIRE(((int)(img_plane[stride * row + 8])) == 0xE2D0);
+    REQUIRE(((int)(img_plane[stride * row + 12])) == 0xB374);
+    REQUIRE(((int)(img_plane[stride * row + 16])) == 0x8080);
+    REQUIRE(((int)(img_plane[stride * row + 20])) == 0xADC6);
+    REQUIRE(((int)(img_plane[stride * row + 24])) == 0xAF49);
+    REQUIRE(((int)(img_plane[stride * row + 28])) == 0x4C8A);
   }
   for (int row = 16; row < 20; row++) {
     INFO("row: " << row);
-    REQUIRE(((int)(img_plane[stride * row + 0])) == 0x00);
-    REQUIRE(((int)(img_plane[stride * row + 7])) == 0x00);
-    REQUIRE(((int)(img_plane[stride * row + 8])) == 0xD0);
-    REQUIRE(((int)(img_plane[stride * row + 15])) == 0xE2);
-    REQUIRE(((int)(img_plane[stride * row + 16])) == 0x74);
-    REQUIRE(((int)(img_plane[stride * row + 23])) == 0xB3);
-    REQUIRE(((int)(img_plane[stride * row + 24])) == 0x80);
-    REQUIRE(((int)(img_plane[stride * row + 31])) == 0x80);
-    REQUIRE(((int)(img_plane[stride * row + 32])) == 0xC6);
-    REQUIRE(((int)(img_plane[stride * row + 39])) == 0xAD);
-    REQUIRE(((int)(img_plane[stride * row + 40])) == 0x49);
-    REQUIRE(((int)(img_plane[stride * row + 47])) == 0xAF);
-    REQUIRE(((int)(img_plane[stride * row + 48])) == 0x8A);
-    REQUIRE(((int)(img_plane[stride * row + 55])) == 0x4C);
-    REQUIRE(((int)(img_plane[stride * row + 56])) == 0x6D);
-    REQUIRE(((int)(img_plane[stride * row + 63])) == 0x4B);
+    REQUIRE(((int)(img_plane[stride * row + 0])) == 0x0000);
+    REQUIRE(((int)(img_plane[stride * row + 4])) == 0xE2D0);
+    REQUIRE(((int)(img_plane[stride * row + 8])) == 0xB374);
+    REQUIRE(((int)(img_plane[stride * row + 12])) == 0x8080);
+    REQUIRE(((int)(img_plane[stride * row + 16])) == 0xADC6);
+    REQUIRE(((int)(img_plane[stride * row + 20])) == 0xAF49);
+    REQUIRE(((int)(img_plane[stride * row + 24])) == 0x4C8A);
+    REQUIRE(((int)(img_plane[stride * row + 28])) == 0x4B6D);
   }
-  img_plane = heif_image_get_plane_readonly(img, heif_channel_Cb, &stride);
+  img_plane = (const uint16_t*)heif_image_get_plane_readonly(img, heif_channel_Cb, &stride);
   REQUIRE(stride == 128);
+  stride /= 2;
   for (int row = 0; row < 4; row++) {
     INFO("row: " << row);
-    REQUIRE(((int)(img_plane[stride * row + 0])) == 0xBC);
-    REQUIRE(((int)(img_plane[stride * row + 1])) == 0x54);
-    REQUIRE(((int)(img_plane[stride * row + 2])) == 0xBC);
-    REQUIRE(((int)(img_plane[stride * row + 3])) == 0x54);
-    REQUIRE(((int)(img_plane[stride * row + 4])) == 0x76);
-    REQUIRE(((int)(img_plane[stride * row + 5])) == 0x55);
-    REQUIRE(((int)(img_plane[stride * row + 6])) == 0x76);
-    REQUIRE(((int)(img_plane[stride * row + 7])) == 0x55);
-    REQUIRE(((int)(img_plane[stride * row + 8])) == 0xBD);
-    REQUIRE(((int)(img_plane[stride * row + 9])) == 0xFF);
-    REQUIRE(((int)(img_plane[stride * row + 10])) == 0xBD);
-    REQUIRE(((int)(img_plane[stride * row + 11])) == 0xFF);
-    REQUIRE(((int)(img_plane[stride * row + 12])) == 0xBD);
-    REQUIRE(((int)(img_plane[stride * row + 13])) == 0x7F);
-    REQUIRE(((int)(img_plane[stride * row + 14])) == 0xBD);
-    REQUIRE(((int)(img_plane[stride * row + 15])) == 0x7F);
-    REQUIRE(((int)(img_plane[stride * row + 16])) == 0xFF);
-    REQUIRE(((int)(img_plane[stride * row + 17])) == 0x7F);
-    REQUIRE(((int)(img_plane[stride * row + 18])) == 0xFF);
-    REQUIRE(((int)(img_plane[stride * row + 19])) == 0x7F);
-    REQUIRE(((int)(img_plane[stride * row + 20])) == 0x00);
-    REQUIRE(((int)(img_plane[stride * row + 21])) == 0x00);
-    REQUIRE(((int)(img_plane[stride * row + 22])) == 0x00);
-    REQUIRE(((int)(img_plane[stride * row + 23])) == 0x00);
-    REQUIRE(((int)(img_plane[stride * row + 24])) == 0x01);
-    REQUIRE(((int)(img_plane[stride * row + 25])) == 0xAB);
-    REQUIRE(((int)(img_plane[stride * row + 26])) == 0x01);
-    REQUIRE(((int)(img_plane[stride * row + 27])) == 0xAB);
-    REQUIRE(((int)(img_plane[stride * row + 28])) == 0xDE);
-    REQUIRE(((int)(img_plane[stride * row + 29])) == 0x7F);
-    REQUIRE(((int)(img_plane[stride * row + 30])) == 0xDE);
-    REQUIRE(((int)(img_plane[stride * row + 31])) == 0x7F);
+    REQUIRE(((int)(img_plane[stride * row + 0])) == 0x54BC);
+    REQUIRE(((int)(img_plane[stride * row + 1])) == 0x54BC);
+    REQUIRE(((int)(img_plane[stride * row + 2])) == 0x5576);
+    REQUIRE(((int)(img_plane[stride * row + 3])) == 0x5576);
+    REQUIRE(((int)(img_plane[stride * row + 4])) == 0xFFBD);
+    REQUIRE(((int)(img_plane[stride * row + 5])) == 0xFFBD);
+    REQUIRE(((int)(img_plane[stride * row + 6])) == 0x7FBD);
+    REQUIRE(((int)(img_plane[stride * row + 7])) == 0x7FBD);
+    REQUIRE(((int)(img_plane[stride * row + 8])) == 0x7FFF);
+    REQUIRE(((int)(img_plane[stride * row + 9])) == 0x7FFF);
+    REQUIRE(((int)(img_plane[stride * row + 10])) == 0x0000);
+    REQUIRE(((int)(img_plane[stride * row + 11])) == 0x0000);
+    REQUIRE(((int)(img_plane[stride * row + 12])) == 0xAB01);
+    REQUIRE(((int)(img_plane[stride * row + 13])) == 0xAB01);
+    REQUIRE(((int)(img_plane[stride * row + 14])) == 0x7FDE);
+    REQUIRE(((int)(img_plane[stride * row + 15])) == 0x7FDE);
   }
   for (int row = 5; row < 8; row++) {
     INFO("row: " << row);
-    REQUIRE(((int)(img_plane[stride * row + 0])) == 0x76);
-    REQUIRE(((int)(img_plane[stride * row + 3])) == 0x55);
-    REQUIRE(((int)(img_plane[stride * row + 4])) == 0xBD);
-    REQUIRE(((int)(img_plane[stride * row + 7])) == 0xFF);
-    REQUIRE(((int)(img_plane[stride * row + 8])) == 0xBD);
-    REQUIRE(((int)(img_plane[stride * row + 11])) == 0x7F);
-    REQUIRE(((int)(img_plane[stride * row + 12])) == 0xFF);
-    REQUIRE(((int)(img_plane[stride * row + 15])) == 0x7F);
-    REQUIRE(((int)(img_plane[stride * row + 16])) == 0x00);
-    REQUIRE(((int)(img_plane[stride * row + 19])) == 0x00);
-    REQUIRE(((int)(img_plane[stride * row + 20])) == 0x01);
-    REQUIRE(((int)(img_plane[stride * row + 23])) == 0xAB);
-    REQUIRE(((int)(img_plane[stride * row + 24])) == 0xDE);
-    REQUIRE(((int)(img_plane[stride * row + 27])) == 0x7F);
-    REQUIRE(((int)(img_plane[stride * row + 28])) == 0xE8);
-    REQUIRE(((int)(img_plane[stride * row + 31])) == 0x1D);
+    REQUIRE(((int)(img_plane[stride * row + 0])) == 0x5576);
+    REQUIRE(((int)(img_plane[stride * row + 2])) == 0xFFBD);
+    REQUIRE(((int)(img_plane[stride * row + 4])) == 0x7FBD);
+    REQUIRE(((int)(img_plane[stride * row + 6])) == 0x7FFF);
+    REQUIRE(((int)(img_plane[stride * row + 8])) == 0x0000);
+    REQUIRE(((int)(img_plane[stride * row + 10])) == 0xAB01);
+    REQUIRE(((int)(img_plane[stride * row + 12])) == 0x7FDE);
+    REQUIRE(((int)(img_plane[stride * row + 14])) == 0x1DE8);
   }
   for (int row = 9; row < 12; row++) {
     INFO("row: " << row);
-    REQUIRE(((int)(img_plane[stride * row + 0])) == 0xBD);
-    REQUIRE(((int)(img_plane[stride * row + 3])) == 0xFF);
-    REQUIRE(((int)(img_plane[stride * row + 4])) == 0xBD);
-    REQUIRE(((int)(img_plane[stride * row + 7])) == 0x7F);
-    REQUIRE(((int)(img_plane[stride * row + 8])) == 0xFF);
-    REQUIRE(((int)(img_plane[stride * row + 11])) == 0x7F);
-    REQUIRE(((int)(img_plane[stride * row + 12])) == 0x00);
-    REQUIRE(((int)(img_plane[stride * row + 15])) == 0x00);
-    REQUIRE(((int)(img_plane[stride * row + 16])) == 0x01);
-    REQUIRE(((int)(img_plane[stride * row + 19])) == 0xAB);
-    REQUIRE(((int)(img_plane[stride * row + 20])) == 0xDE);
-    REQUIRE(((int)(img_plane[stride * row + 23])) == 0x7F);
-    REQUIRE(((int)(img_plane[stride * row + 24])) == 0xE8);
-    REQUIRE(((int)(img_plane[stride * row + 27])) == 0x1D);
-    REQUIRE(((int)(img_plane[stride * row + 28])) == 0xA5);
-    REQUIRE(((int)(img_plane[stride * row + 31])) == 0xA3);
+    REQUIRE(((int)(img_plane[stride * row + 0])) == 0xFFBD);
+    REQUIRE(((int)(img_plane[stride * row + 2])) == 0x7FBD);
+    REQUIRE(((int)(img_plane[stride * row + 4])) == 0x7FFF);
+    REQUIRE(((int)(img_plane[stride * row + 6])) == 0x0000);
+    REQUIRE(((int)(img_plane[stride * row + 8])) == 0xAB01);
+    REQUIRE(((int)(img_plane[stride * row + 10])) == 0x7FDE);
+    REQUIRE(((int)(img_plane[stride * row + 12])) == 0x1DE8);
+    REQUIRE(((int)(img_plane[stride * row + 14])) == 0xA3A5);
   }
   for (int row = 12; row < 16; row++) {
     INFO("row: " << row);
-    REQUIRE(((int)(img_plane[stride * row + 0])) == 0xBD);
-    REQUIRE(((int)(img_plane[stride * row + 3])) == 0x7F);
-    REQUIRE(((int)(img_plane[stride * row + 4])) == 0xFF);
-    REQUIRE(((int)(img_plane[stride * row + 7])) == 0x7F);
-    REQUIRE(((int)(img_plane[stride * row + 8])) == 0x00);
-    REQUIRE(((int)(img_plane[stride * row + 11])) == 0x00);
-    REQUIRE(((int)(img_plane[stride * row + 12])) == 0x01);
-    REQUIRE(((int)(img_plane[stride * row + 15])) == 0xAB);
-    REQUIRE(((int)(img_plane[stride * row + 16])) == 0xDE);
-    REQUIRE(((int)(img_plane[stride * row + 19])) == 0x7F);
-    REQUIRE(((int)(img_plane[stride * row + 20])) == 0xE8);
-    REQUIRE(((int)(img_plane[stride * row + 23])) == 0x1D);
-    REQUIRE(((int)(img_plane[stride * row + 24])) == 0xA5);
-    REQUIRE(((int)(img_plane[stride * row + 27])) == 0xA3);
-    REQUIRE(((int)(img_plane[stride * row + 28])) == 0xBC);
-    REQUIRE(((int)(img_plane[stride * row + 31])) == 0x54);
+    REQUIRE(((int)(img_plane[stride * row + 0])) == 0x7FBD);
+    REQUIRE(((int)(img_plane[stride * row + 2])) == 0x7FFF);
+    REQUIRE(((int)(img_plane[stride * row + 4])) == 0x0000);
+    REQUIRE(((int)(img_plane[stride * row + 6])) == 0xAB01);
+    REQUIRE(((int)(img_plane[stride * row + 8])) == 0x7FDE);
+    REQUIRE(((int)(img_plane[stride * row + 10])) == 0x1DE8);
+    REQUIRE(((int)(img_plane[stride * row + 12])) == 0xA3A5);
+    REQUIRE(((int)(img_plane[stride * row + 14])) == 0x54BC);
   }
   for (int row = 16; row < 20; row++) {
     INFO("row: " << row);
-    REQUIRE(((int)(img_plane[stride * row + 0])) == 0xFF);
-    REQUIRE(((int)(img_plane[stride * row + 3])) == 0x7F);
-    REQUIRE(((int)(img_plane[stride * row + 4])) == 0x00);
-    REQUIRE(((int)(img_plane[stride * row + 7])) == 0x00);
-    REQUIRE(((int)(img_plane[stride * row + 8])) == 0x01);
-    REQUIRE(((int)(img_plane[stride * row + 11])) == 0xAB);
-    REQUIRE(((int)(img_plane[stride * row + 12])) == 0xDE);
-    REQUIRE(((int)(img_plane[stride * row + 15])) == 0x7F);
-    REQUIRE(((int)(img_plane[stride * row + 16])) == 0xE8);
-    REQUIRE(((int)(img_plane[stride * row + 19])) == 0x1D);
-    REQUIRE(((int)(img_plane[stride * row + 20])) == 0xA5);
-    REQUIRE(((int)(img_plane[stride * row + 23])) == 0xA3);
-    REQUIRE(((int)(img_plane[stride * row + 24])) == 0xBC);
-    REQUIRE(((int)(img_plane[stride * row + 27])) == 0x54);
-    REQUIRE(((int)(img_plane[stride * row + 28])) == 0x76);
-    REQUIRE(((int)(img_plane[stride * row + 31])) == 0x55);
+    REQUIRE(((int)(img_plane[stride * row + 0])) == 0x7FFF);
+    REQUIRE(((int)(img_plane[stride * row + 2])) == 0x0000);
+    REQUIRE(((int)(img_plane[stride * row + 4])) == 0xAB01);
+    REQUIRE(((int)(img_plane[stride * row + 6])) == 0x7FDE);
+    REQUIRE(((int)(img_plane[stride * row + 8])) == 0x1DE8);
+    REQUIRE(((int)(img_plane[stride * row + 10])) == 0xA3A5);
+    REQUIRE(((int)(img_plane[stride * row + 12])) == 0x54BC);
+    REQUIRE(((int)(img_plane[stride * row + 14])) == 0x5576);
   }
-  img_plane = heif_image_get_plane_readonly(img, heif_channel_Cr, &stride);
+  img_plane = (const uint16_t*)heif_image_get_plane_readonly(img, heif_channel_Cr, &stride);
   REQUIRE(stride == 128);
+  stride /= 2;
   for (int row = 0; row < 4; row++) {
     INFO("row: " << row);
-    REQUIRE(((int)(img_plane[stride * row + 0])) == 0xBD);
-    REQUIRE(((int)(img_plane[stride * row + 1])) == 0xFF);
-    REQUIRE(((int)(img_plane[stride * row + 2])) == 0xBD);
-    REQUIRE(((int)(img_plane[stride * row + 3])) == 0xFF);
-    REQUIRE(((int)(img_plane[stride * row + 4])) == 0x48);
-    REQUIRE(((int)(img_plane[stride * row + 5])) == 0x4A);
-    REQUIRE(((int)(img_plane[stride * row + 6])) == 0x48);
-    REQUIRE(((int)(img_plane[stride * row + 7])) == 0x4A);
-    REQUIRE(((int)(img_plane[stride * row + 8])) == 0x2F);
-    REQUIRE(((int)(img_plane[stride * row + 9])) == 0x6B);
-    REQUIRE(((int)(img_plane[stride * row + 10])) == 0x2F);
-    REQUIRE(((int)(img_plane[stride * row + 11])) == 0x6B);
-    REQUIRE(((int)(img_plane[stride * row + 12])) == 0xEB);
-    REQUIRE(((int)(img_plane[stride * row + 13])) == 0x7F);
-    REQUIRE(((int)(img_plane[stride * row + 14])) == 0xEB);
-    REQUIRE(((int)(img_plane[stride * row + 15])) == 0x7F);
-    REQUIRE(((int)(img_plane[stride * row + 16])) == 0xFF);
-    REQUIRE(((int)(img_plane[stride * row + 17])) == 0x7F);
-    REQUIRE(((int)(img_plane[stride * row + 18])) == 0xFF);
-    REQUIRE(((int)(img_plane[stride * row + 19])) == 0x7F);
-    REQUIRE(((int)(img_plane[stride * row + 20])) == 0xBB);
-    REQUIRE(((int)(img_plane[stride * row + 21])) == 0x94);
-    REQUIRE(((int)(img_plane[stride * row + 22])) == 0xBB);
-    REQUIRE(((int)(img_plane[stride * row + 23])) == 0x94);
-    REQUIRE(((int)(img_plane[stride * row + 24])) == 0x2D);
-    REQUIRE(((int)(img_plane[stride * row + 25])) == 0x00);
-    REQUIRE(((int)(img_plane[stride * row + 26])) == 0x2D);
-    REQUIRE(((int)(img_plane[stride * row + 27])) == 0x00);
-    REQUIRE(((int)(img_plane[stride * row + 28])) == 0xF5);
-    REQUIRE(((int)(img_plane[stride * row + 29])) == 0x7F);
-    REQUIRE(((int)(img_plane[stride * row + 30])) == 0xF5);
-    REQUIRE(((int)(img_plane[stride * row + 31])) == 0x7F);
+    REQUIRE(((int)(img_plane[stride * row + 0])) == 0xFFBD);
+    REQUIRE(((int)(img_plane[stride * row + 1])) == 0xFFBD);
+    REQUIRE(((int)(img_plane[stride * row + 2])) == 0x4A48);
+    REQUIRE(((int)(img_plane[stride * row + 3])) == 0x4A48);
+    REQUIRE(((int)(img_plane[stride * row + 4])) == 0x6B2F);
+    REQUIRE(((int)(img_plane[stride * row + 5])) == 0x6B2F);
+    REQUIRE(((int)(img_plane[stride * row + 6])) == 0x7FEB);
+    REQUIRE(((int)(img_plane[stride * row + 7])) == 0x7FEB);
+    REQUIRE(((int)(img_plane[stride * row + 8])) == 0x7FFF);
+    REQUIRE(((int)(img_plane[stride * row + 9])) == 0x7FFF);
+    REQUIRE(((int)(img_plane[stride * row + 10])) == 0x94BB);
+    REQUIRE(((int)(img_plane[stride * row + 11])) == 0x94BB);
+    REQUIRE(((int)(img_plane[stride * row + 12])) == 0x002D);
+    REQUIRE(((int)(img_plane[stride * row + 13])) == 0x002D);
+    REQUIRE(((int)(img_plane[stride * row + 14])) == 0x7FF5);
+    REQUIRE(((int)(img_plane[stride * row + 15])) == 0x7FF5);
   }
   for (int row = 4; row < 8; row++) {
     INFO("row: " << row);
-    REQUIRE(((int)(img_plane[stride * row + 0])) == 0x48);
-    REQUIRE(((int)(img_plane[stride * row + 3])) == 0x4A);
-    REQUIRE(((int)(img_plane[stride * row + 4])) == 0x2F);
-    REQUIRE(((int)(img_plane[stride * row + 7])) == 0x6B);
-    REQUIRE(((int)(img_plane[stride * row + 8])) == 0xEB);
-    REQUIRE(((int)(img_plane[stride * row + 11])) == 0x7F);
-    REQUIRE(((int)(img_plane[stride * row + 12])) == 0xFF);
-    REQUIRE(((int)(img_plane[stride * row + 15])) == 0x7F);
-    REQUIRE(((int)(img_plane[stride * row + 16])) == 0xBB);
-    REQUIRE(((int)(img_plane[stride * row + 19])) == 0x94);
-    REQUIRE(((int)(img_plane[stride * row + 20])) == 0x2D);
-    REQUIRE(((int)(img_plane[stride * row + 23])) == 0x00);
-    REQUIRE(((int)(img_plane[stride * row + 24])) == 0xF5);
-    REQUIRE(((int)(img_plane[stride * row + 27])) == 0x7F);
-    REQUIRE(((int)(img_plane[stride * row + 28])) == 0x80);
-    REQUIRE(((int)(img_plane[stride * row + 31])) == 0xBA);
+    REQUIRE(((int)(img_plane[stride * row + 0])) == 0x4A48);
+    REQUIRE(((int)(img_plane[stride * row + 2])) == 0x6B2F);
+    REQUIRE(((int)(img_plane[stride * row + 4])) == 0x7FEB);
+    REQUIRE(((int)(img_plane[stride * row + 6])) == 0x7FFF);
+    REQUIRE(((int)(img_plane[stride * row + 8])) == 0x94BB);
+    REQUIRE(((int)(img_plane[stride * row + 10])) == 0x002D);
+    REQUIRE(((int)(img_plane[stride * row + 12])) == 0x7FF5);
+    REQUIRE(((int)(img_plane[stride * row + 14])) == 0xBA80);
   }
   for (int row = 8; row < 12; row++) {
     INFO("row: " << row);
-    REQUIRE(((int)(img_plane[stride * row + 0])) == 0x2F);
-    REQUIRE(((int)(img_plane[stride * row + 3])) == 0x6B);
-    REQUIRE(((int)(img_plane[stride * row + 4])) == 0xEB);
-    REQUIRE(((int)(img_plane[stride * row + 7])) == 0x7F);
-    REQUIRE(((int)(img_plane[stride * row + 8])) == 0xFF);
-    REQUIRE(((int)(img_plane[stride * row + 11])) == 0x7F);
-    REQUIRE(((int)(img_plane[stride * row + 12])) == 0xBB);
-    REQUIRE(((int)(img_plane[stride * row + 15])) == 0x94);
-    REQUIRE(((int)(img_plane[stride * row + 16])) == 0x2D);
-    REQUIRE(((int)(img_plane[stride * row + 19])) == 0x00);
-    REQUIRE(((int)(img_plane[stride * row + 20])) == 0xF5);
-    REQUIRE(((int)(img_plane[stride * row + 23])) == 0x7F);
-    REQUIRE(((int)(img_plane[stride * row + 24])) == 0x80);
-    REQUIRE(((int)(img_plane[stride * row + 27])) == 0xBA);
-    REQUIRE(((int)(img_plane[stride * row + 28])) == 0x3F);
-    REQUIRE(((int)(img_plane[stride * row + 31])) == 0xAD);
+    REQUIRE(((int)(img_plane[stride * row + 0])) == 0x6B2F);
+    REQUIRE(((int)(img_plane[stride * row + 2])) == 0x7FEB);
+    REQUIRE(((int)(img_plane[stride * row + 4])) == 0x7FFF);
+    REQUIRE(((int)(img_plane[stride * row + 6])) == 0x94BB);
+    REQUIRE(((int)(img_plane[stride * row + 8])) == 0x002D);
+    REQUIRE(((int)(img_plane[stride * row + 10])) == 0x7FF5);
+    REQUIRE(((int)(img_plane[stride * row + 12])) == 0xBA80);
+    REQUIRE(((int)(img_plane[stride * row + 14])) == 0xAD3F);
   }
   for (int row = 12; row < 16; row++) {
     INFO("row: " << row);
-    REQUIRE(((int)(img_plane[stride * row + 0])) == 0xEB);
-    REQUIRE(((int)(img_plane[stride * row + 3])) == 0x7F);
-    REQUIRE(((int)(img_plane[stride * row + 4])) == 0xFF);
-    REQUIRE(((int)(img_plane[stride * row + 7])) == 0x7F);
-    REQUIRE(((int)(img_plane[stride * row + 8])) == 0xBB);
-    REQUIRE(((int)(img_plane[stride * row + 11])) == 0x94);
-    REQUIRE(((int)(img_plane[stride * row + 12])) == 0x2D);
-    REQUIRE(((int)(img_plane[stride * row + 15])) == 0x00);
-    REQUIRE(((int)(img_plane[stride * row + 16])) == 0xF5);
-    REQUIRE(((int)(img_plane[stride * row + 19])) == 0x7F);
-    REQUIRE(((int)(img_plane[stride * row + 20])) == 0x80);
-    REQUIRE(((int)(img_plane[stride * row + 23])) == 0xBA);
-    REQUIRE(((int)(img_plane[stride * row + 24])) == 0x3F);
-    REQUIRE(((int)(img_plane[stride * row + 27])) == 0xAD);
-    REQUIRE(((int)(img_plane[stride * row + 28])) == 0xBD);
-    REQUIRE(((int)(img_plane[stride * row + 31])) == 0xFF);
+    REQUIRE(((int)(img_plane[stride * row + 0])) == 0x7FEB);
+    REQUIRE(((int)(img_plane[stride * row + 2])) == 0x7FFF);
+    REQUIRE(((int)(img_plane[stride * row + 4])) == 0x94BB);
+    REQUIRE(((int)(img_plane[stride * row + 6])) == 0x002D);
+    REQUIRE(((int)(img_plane[stride * row + 8])) == 0x7FF5);
+    REQUIRE(((int)(img_plane[stride * row + 10])) == 0xBA80);
+    REQUIRE(((int)(img_plane[stride * row + 12])) == 0xAD3F);
+    REQUIRE(((int)(img_plane[stride * row + 14])) == 0xFFBD);
   }
   for (int row = 16; row < 20; row++) {
     INFO("row: " << row);
-    REQUIRE(((int)(img_plane[stride * row + 0])) == 0xFF);
-    REQUIRE(((int)(img_plane[stride * row + 3])) == 0x7F);
-    REQUIRE(((int)(img_plane[stride * row + 4])) == 0xBB);
-    REQUIRE(((int)(img_plane[stride * row + 7])) == 0x94);
-    REQUIRE(((int)(img_plane[stride * row + 8])) == 0x2D);
-    REQUIRE(((int)(img_plane[stride * row + 11])) == 0x00);
-    REQUIRE(((int)(img_plane[stride * row + 12])) == 0xF5);
-    REQUIRE(((int)(img_plane[stride * row + 15])) == 0x7F);
-    REQUIRE(((int)(img_plane[stride * row + 16])) == 0x80);
-    REQUIRE(((int)(img_plane[stride * row + 19])) == 0xBA);
-    REQUIRE(((int)(img_plane[stride * row + 20])) == 0x3F);
-    REQUIRE(((int)(img_plane[stride * row + 23])) == 0xAD);
-    REQUIRE(((int)(img_plane[stride * row + 24])) == 0xBD);
-    REQUIRE(((int)(img_plane[stride * row + 27])) == 0xFF);
-    REQUIRE(((int)(img_plane[stride * row + 28])) == 0x48);
-    REQUIRE(((int)(img_plane[stride * row + 31])) == 0x4A);
+    REQUIRE(((int)(img_plane[stride * row + 0])) == 0x7FFF);
+    REQUIRE(((int)(img_plane[stride * row + 2])) == 0x94BB);
+    REQUIRE(((int)(img_plane[stride * row + 4])) == 0x002D);
+    REQUIRE(((int)(img_plane[stride * row + 6])) == 0x7FF5);
+    REQUIRE(((int)(img_plane[stride * row + 8])) == 0xBA80);
+    REQUIRE(((int)(img_plane[stride * row + 10])) == 0xAD3F);
+    REQUIRE(((int)(img_plane[stride * row + 12])) == 0xFFBD);
+    REQUIRE(((int)(img_plane[stride * row + 14])) == 0x4A48);
   }
 
   heif_image_release(img);