1 files changed, 107 insertions, 0 deletions
diff --git a/v4l2-apps/libv4l/libv4lconvert/flip.c b/v4l2-apps/libv4l/libv4lconvert/flip.c
new file mode 100644
index 000000000..cd3468a89
--- /dev/null
+++ b/v4l2-apps/libv4l/libv4lconvert/flip.c
@@ -0,0 +1,107 @@
+/*
+
+# RGB / YUV flip/rotate routines
+
+#             (C) 2008 Hans de Goede <j.w.r.degoede@hhs.nl>
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as published by
+# the Free Software Foundation; either version 2.1 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+*/
+
+#include "libv4lconvert-priv.h"
+
+void v4lconvert_rotate180_rgbbgr24(const unsigned char *src, unsigned char *dst,
+  int width, int height)
+{
+  int i;
+
+  src += 3 * width * height - 3;
+
+  for (i = 0; i < width * height; i++) {
+    dst[0] = src[0];
+    dst[1] = src[1];
+    dst[2] = src[2];
+    dst += 3;
+    src -= 3;
+  }
+}
+
+void v4lconvert_rotate180_yuv420(const unsigned char *src, unsigned char *dst,
+  int width, int height)
+{
+  int i;
+
+  /* First flip x and y of the Y plane */
+  src += width * height - 1;
+  for (i = 0; i < width * height; i++)
+    *dst++ = *src--;
+
+  /* Now flip the U plane */
+  src += width * height * 5 / 4;
+  for (i = 0; i < width * height / 4; i++)
+    *dst++ = *src--;
+
+  /* Last flip the V plane */
+  src += width * height / 2;
+  for (i = 0; i < width * height / 4; i++)
+    *dst++ = *src--;
+}
+
+void v4lconvert_rotate90_rgbbgr24(const unsigned char *src, unsigned char *dst,
+  int destwidth, int destheight)
+{
+  int x, y;
+#define srcwidth destheight
+#define srcheight destwidth
+
+  for (y = 0; y < destheight; y++)
+    for (x = 0; x < destwidth; x++) {
+      int offset = ((srcheight - x - 1) * srcwidth + y) * 3;
+      *dst++ = src[offset++];
+      *dst++ = src[offset++];
+      *dst++ = src[offset];
+    }
+}
+
+void v4lconvert_rotate90_yuv420(const unsigned char *src, unsigned char *dst,
+  int destwidth, int destheight)
+{
+  int x, y;
+
+  /* Y-plane */
+  for (y = 0; y < destheight; y++)
+    for (x = 0; x < destwidth; x++) {
+      int offset = (srcheight - x - 1) * srcwidth + y;
+      *dst++ = src[offset];
+    }
+
+  /* U-plane */
+  src += srcwidth * srcheight;
+  destwidth /= 2;
+  destheight /= 2;
+  for (y = 0; y < destheight; y++)
+    for (x = 0; x < destwidth; x++) {
+      int offset = (srcheight - x - 1) * srcwidth + y;
+      *dst++ = src[offset];
+    }
+
+  /* V-plane */
+  src += srcwidth * srcheight;
+  for (y = 0; y < destheight; y++)
+    for (x = 0; x < destwidth; x++) {
+      int offset = (srcheight - x - 1) * srcwidth + y;
+      *dst++ = src[offset];
+    }
+}