From e1f9d581c442134fc67bf465f5e5e22a8013020f Mon Sep 17 00:00:00 2001
From: Stefan Jahn <stefan@gruft.de>
Date: Wed, 30 Nov 2022 20:57:24 +0100
Subject: [PATCH] Enable files >2GB on 32bit systems; some fix for simple
 debayering

---
 debayer.cc           | 8 ++++----
 videodev-dumpfile.cc | 4 ++++
 2 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/debayer.cc b/debayer.cc
index 73fe9d8..2bd919a 100644
--- a/debayer.cc
+++ b/debayer.cc
@@ -16,8 +16,8 @@ void debayer_grbg16_simple (uint16_t * src, int src_w, int src_h,
   for (ys = 0, yd = 0; ys < src_h && yd < dst_h; ys++, yd++) {
     for (xs = 0, xd = 0; xs < src_w; xs++) {
 
-      /* read the pixel but only the lower 8bit */
-      t = *(src++) & 0x00FF;
+      /* read the pixel but only the higher 8bit, assuming data is little endian */
+      t = *(src++) >> 8;
       
       if (xs & 1) {
 	if (ys & 1) {
@@ -40,9 +40,9 @@ void debayer_grbg16_simple (uint16_t * src, int src_w, int src_h,
       /* only paint the image if the source is within the destination */
       if (xd < dst_w) {
 	/* set the pixel */
-	*(dst++) = b;
-	*(dst++) = g;
 	*(dst++) = r;
+	*(dst++) = g;
+	*(dst++) = b;
 	xd++;
       }
     }
diff --git a/videodev-dumpfile.cc b/videodev-dumpfile.cc
index fa4ac55..0859820 100644
--- a/videodev-dumpfile.cc
+++ b/videodev-dumpfile.cc
@@ -7,6 +7,10 @@
  * This is needed only for debugging.
  ************************************************************************************/
 
+/* enable files > 2GB on 32 bit systems */
+#define _LARGEFILE64_SOURCE 1
+#define _FILE_OFFSET_BITS 64
+
 #include <sys/types.h>
 #include <dirent.h>
 #include <ctype.h>