[patch, libv4l]: Add support for GRBG10 format conversion

[Pavel Machek <pavel@ucw.cz>]

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Add support for GRBG10 format conversion.
    
Signed-off-by: Pavel Machek <pavel@ucw.cz>

diff --git a/lib/libv4lconvert/libv4lconvert.c b/lib/libv4lconvert/libv4lconvert.c
index d3d8936..a7376b8 100644
--- a/lib/libv4lconvert/libv4lconvert.c
+++ b/lib/libv4lconvert/libv4lconvert.c
@@ -123,6 +123,7 @@ static const struct v4lconvert_pixfmt supported_src_pixfmts[] = {
 	{ V4L2_PIX_FMT_SGRBG8,		 8,	 8,	 8,	1 },
 	{ V4L2_PIX_FMT_SRGGB8,		 8,	 8,	 8,	1 },
 	{ V4L2_PIX_FMT_STV0680,		 8,	 8,	 8,	1 },
+	{ V4L2_PIX_FMT_SGRBG10,		16,	 8,	 8,	1 },
 	/* compressed bayer */
 	{ V4L2_PIX_FMT_SPCA561,		 0,	 9,	 9,	1 },
 	{ V4L2_PIX_FMT_SN9C10X,		 0,	 9,	 9,	1 },
@@ -694,6 +695,16 @@ unsigned char *v4lconvert_alloc_buffer(int needed,
 	return *buf;
 }
 
+static void v4lconvert_10to8(void *_src, unsigned char *dst, int width, int height)
+{
+	int i;
+	uint16_t *src = _src;
+	
+	for (i=0; i<width*height; i++) {
+		dst[i] = src[i] >> 2;
+	}
+}
+
 int v4lconvert_oom_error(struct v4lconvert_data *data)
 {
 	V4LCONVERT_ERR("could not allocate memory\n");
@@ -867,7 +878,8 @@ static int v4lconvert_convert_pixfmt(struct v4lconvert_data *data,
 #endif
 	case V4L2_PIX_FMT_SN9C2028:
 	case V4L2_PIX_FMT_SQ905C:
-	case V4L2_PIX_FMT_STV0680: { /* Not compressed but needs some shuffling */
+	case V4L2_PIX_FMT_STV0680:
+	case V4L2_PIX_FMT_SGRBG10: { /* Not compressed but needs some shuffling */
 		unsigned char *tmpbuf;
 		struct v4l2_format tmpfmt = *fmt;
 
@@ -877,6 +889,11 @@ static int v4lconvert_convert_pixfmt(struct v4lconvert_data *data,
 			return v4lconvert_oom_error(data);
 
 		switch (src_pix_fmt) {
+		case V4L2_PIX_FMT_SGRBG10:
+			v4lconvert_10to8(src, tmpbuf, width, height);
+			tmpfmt.fmt.pix.pixelformat = V4L2_PIX_FMT_SGRBG8;
+			bytesperline = width;
+			break;
 		case V4L2_PIX_FMT_SPCA561:
 			v4lconvert_decode_spca561(src, tmpbuf, width, height);
 			tmpfmt.fmt.pix.pixelformat = V4L2_PIX_FMT_SGBRG8;

-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

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