1 files changed, 126 insertions, 0 deletions
diff --git a/v4l2-apps/libv4l/libv4lconvert/spca501.c b/v4l2-apps/libv4l/libv4lconvert/spca501.c
new file mode 100644
index 000000000..9157629e3
--- /dev/null
+++ b/v4l2-apps/libv4l/libv4lconvert/spca501.c
@@ -0,0 +1,126 @@
+/*
+#             (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"
+
+/* YUYV per line */
+void v4lconvert_spca501_to_yuv420(const unsigned char *src, unsigned char *dst,
+  int width, int height)
+{
+  int i,j;
+  unsigned long *lsrc = (unsigned long *)src;
+
+  for (i = 0; i < height; i += 2) {
+    /* -128 - 127 --> 0 - 255 and copy first line Y */
+    unsigned long *ldst = (unsigned long *)(dst + i * width);
+    for (j = 0; j < width; j += sizeof(long)) {
+      *ldst = *lsrc++;
+      *ldst++ ^= 0x8080808080808080ULL;
+    }
+
+    /* -128 - 127 --> 0 - 255 and copy 1 line U */
+    ldst = (unsigned long *)(dst + width * height + i * width / 4);
+    for (j = 0; j < width/2; j += sizeof(long)) {
+      *ldst = *lsrc++;
+      *ldst++ ^= 0x8080808080808080ULL;
+    }
+
+    /* -128 - 127 --> 0 - 255 and copy second line Y */
+    ldst = (unsigned long *)(dst + i * width + width);
+    for (j = 0; j < width; j += sizeof(long)) {
+      *ldst = *lsrc++;
+      *ldst++ ^= 0x8080808080808080ULL;
+    }
+
+    /* -128 - 127 --> 0 - 255 and copy 1 line V */
+    ldst = (unsigned long *)(dst + (width * height * 5) / 4 + i * width / 4);
+    for (j = 0; j < width/2; j += sizeof(long)) {
+      *ldst = *lsrc++;
+      *ldst++ ^= 0x8080808080808080ULL;
+    }
+  }
+}
+
+/* YYUV per line */
+void v4lconvert_spca505_to_yuv420(const unsigned char *src, unsigned char *dst,
+  int width, int height)
+{
+  int i,j;
+  unsigned long *lsrc = (unsigned long *)src;
+
+  for (i = 0; i < height; i += 2) {
+    /* -128 - 127 --> 0 - 255 and copy 2 lines of Y */
+    unsigned long *ldst = (unsigned long *)(dst + i * width);
+    for (j = 0; j < width*2; j += sizeof(long)) {
+      *ldst = *lsrc++;
+      *ldst++ ^= 0x8080808080808080ULL;
+    }
+
+    /* -128 - 127 --> 0 - 255 and copy 1 line U */
+    ldst = (unsigned long *)(dst + width * height + i * width / 4);
+    for (j = 0; j < width/2; j += sizeof(long)) {
+      *ldst = *lsrc++;
+      *ldst++ ^= 0x8080808080808080ULL;
+    }
+
+    /* -128 - 127 --> 0 - 255 and copy 1 line V */
+    ldst = (unsigned long *)(dst + (width * height * 5) / 4 + i * width / 4);
+    for (j = 0; j < width/2; j += sizeof(long)) {
+      *ldst = *lsrc++;
+      *ldst++ ^= 0x8080808080808080ULL;
+    }
+  }
+}
+
+/* YUVY per line */
+void v4lconvert_spca508_to_yuv420(const unsigned char *src, unsigned char *dst,
+  int width, int height)
+{
+  int i,j;
+  unsigned long *lsrc = (unsigned long *)src;
+
+  for (i = 0; i < height; i += 2) {
+    /* -128 - 127 --> 0 - 255 and copy first line Y */
+    unsigned long *ldst = (unsigned long *)(dst + i * width);
+    for (j = 0; j < width; j += sizeof(long)) {
+      *ldst = *lsrc++;
+      *ldst++ ^= 0x8080808080808080ULL;
+    }
+
+    /* -128 - 127 --> 0 - 255 and copy 1 line U */
+    ldst = (unsigned long *)(dst + width * height + i * width / 4);
+    for (j = 0; j < width/2; j += sizeof(long)) {
+      *ldst = *lsrc++;
+      *ldst++ ^= 0x8080808080808080ULL;
+    }
+
+    /* -128 - 127 --> 0 - 255 and copy 1 line V */
+    ldst = (unsigned long *)(dst + (width * height * 5) / 4 + i * width / 4);
+    for (j = 0; j < width/2; j += sizeof(long)) {
+      *ldst = *lsrc++;
+      *ldst++ ^= 0x8080808080808080ULL;
+    }
+
+    /* -128 - 127 --> 0 - 255 and copy second line Y */
+    ldst = (unsigned long *)(dst + i * width + width);
+    for (j = 0; j < width; j += sizeof(long)) {
+      *ldst = *lsrc++;
+      *ldst++ ^= 0x8080808080808080ULL;
+    }
+  }
+}