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V4L/DVB (9239): Add support for rgb555 pixel formats to vivi

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This patch adds RGB555 pixel format support to the vivi driver. Both
little endian and big endian versions are added. The driver follows
the RGB pixel format described in Table 2-2 of the V4L2 API spec,
_not_ the older BGR interpretation described in Table 2-1.

Signed-off-by: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Magnus Damm 2008-10-14 12:47:43 -03:00 committed by Mauro Carvalho Chehab
parent aeadb5d4e5
commit def5239320
1 changed files with 40 additions and 0 deletions
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40
drivers/media/video/vivi.c
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@ -149,6 +149,16 @@ static struct vivi_fmt formats[] = {
.fourcc = V4L2_PIX_FMT_RGB565X, /* rrrrrggg gggbbbbb */
.depth = 16,
},
{
.name = "RGB555 (LE)",
.fourcc = V4L2_PIX_FMT_RGB555, /* gggbbbbb arrrrrgg */
.depth = 16,
},
{
.name = "RGB555 (BE)",
.fourcc = V4L2_PIX_FMT_RGB555X, /* arrrrrgg gggbbbbb */
.depth = 16,
},
};
static struct vivi_fmt *get_format(struct v4l2_format *f)
@ -335,6 +345,30 @@ static void gen_twopix(struct vivi_fh *fh, unsigned char *buf, int colorpos)
break;
}
break;
case V4L2_PIX_FMT_RGB555:
switch (color) {
case 0:
case 2:
*p = (g_u << 5) | b_v;
break;
case 1:
case 3:
*p = (r_y << 2) | (g_u >> 3);
break;
}
break;
case V4L2_PIX_FMT_RGB555X:
switch (color) {
case 0:
case 2:
*p = (r_y << 2) | (g_u >> 3);
break;
case 1:
case 3:
*p = (g_u << 5) | b_v;
break;
}
break;
}
}
}
@ -818,6 +852,12 @@ static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
g >>= 2;
b >>= 3;
break;
case V4L2_PIX_FMT_RGB555:
case V4L2_PIX_FMT_RGB555X:
r >>= 3;
g >>= 3;
b >>= 3;
break;
}
if (is_yuv) {