Package: opencv
Severity: wishlist
Tags: patch
Hi,
The UYVY format is not supported in v4l of OpenCV.
Opencv cannot be used because it is not supported though
iSight of MacBook is this format.
I wrote the patch to support it and check working.
Please apply this patch.
Best regards,
Nobuhiro
-- System Information:
Debian Release: lenny/sid
APT prefers unstable
APT policy: (500, 'unstable')
Architecture: i386 (i686)
Kernel: Linux 2.6.25-1-686-bigmem (SMP w/2 CPU cores)
Locale: LANG=ja_JP.UTF-8, LC_CTYPE=ja_JP.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash
--
Nobuhiro Iwamatsu
[EMAIL PROTECTED]
[EMAIL PROTECTED]
GPG ID : 3170EBE9
--- opencv-1.0.0/otherlibs/highgui/cvcap_v4l.cpp 2006-09-27 10:40:03.000000000 +0900
+++ opencv-1.0.0/otherlibs/highgui/cvcap_v4l.cpp 2008-07-26 13:12:28.000000000 +0900
@@ -146,6 +146,9 @@
some drivers working, but not fully with V4L2. (so, we do not know when we
need to switch from V4L2 to V4L.
+Sat, 26 Jul 2008 12:59:04 +0900 Nobuhiro Iwamatsu <[EMAIL PROTECTED]>
+- Add support UYVY format.
+
make & enjoy!
*/
@@ -254,6 +257,7 @@
PALETTE_YVU420 = 0,
PALETTE_YUV411P = 0,
PALETTE_YUYV = 0,
+ PALETTE_UYVY = 0,
PALETTE_SBGGR8 = 0,
PALETTE_SN9C10X = 0,
PALETTE_MJPEG = 0;
@@ -551,7 +555,6 @@
else
#endif
#endif
-
if (try_palette_v4l2(capture, V4L2_PIX_FMT_YUYV) == 0)
{
PALETTE_YUYV = 1;
@@ -574,6 +577,10 @@
if (try_palette_v4l2(capture, V4L2_PIX_FMT_SBGGR8) == 0)
{
PALETTE_SBGGR8 = 1;
+ } else
+ if (try_palette_v4l2(capture, V4L2_PIX_FMT_UYVY) == 0)
+ {
+ PALETTE_UYVY = 1;
}
else
{
@@ -1592,6 +1599,47 @@
}
}
+#define YUV2RGB(y, u, v, r, g, b) \
+ r = y + ((v*1436) >> 10); \
+ g = y - ((u*352 + v*731) >> 10); \
+ b = y + ((u*1814) >> 10); \
+ r = r < 0 ? 0 : r; \
+ g = g < 0 ? 0 : g; \
+ b = b < 0 ? 0 : b; \
+ r = r > 255 ? 255 : r; \
+ g = g > 255 ? 255 : g; \
+ b = b > 255 ? 255 : b
+
+static void
+uyvy_to_rgb24 (int width, int height, unsigned char *src, unsigned char *dst)
+{
+ unsigned char *s;
+ unsigned char *d;
+ int l, c;
+ register int r, g, b, y0, y1, u, v;
+
+ l = height;
+ s = src;
+ d = dst;
+ while (l--) {
+ c = width >> 1;
+ while (c--) {
+ u = *s++; u -= 128;
+ y0 = *s++;
+ v = *s++; v -= 128;
+ y1 = *s++;
+ YUV2RGB(y0, u, v, r, g, b);
+ *d++ = b;
+ *d++ = g;
+ *d++ = r;
+ YUV2RGB(y1, u, v, r, g, b);
+ *d++ = b;
+ *d++ = g;
+ *d++ = r;
+ }
+ }
+}
+
#ifdef HAVE_JPEG
#ifdef __USE_GNU
/* support for MJPEG is only available with libjpeg and gcc,
@@ -2047,6 +2095,12 @@
capture->form.fmt.pix.height,
(unsigned char*)(capture->buffers[capture->bufferIndex].start),
(unsigned char*)capture->frame.imageData);
+
+ if (PALETTE_UYVY == 1)
+ uyvy_to_rgb24(capture->form.fmt.pix.width,
+ capture->form.fmt.pix.height,
+ (unsigned char*)(capture->buffers[capture->bufferIndex].start),
+ (unsigned char*)capture->frame.imageData);
if (PALETTE_SBGGR8 == 1)
{
