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media: vim2m: add bayer capture formats 

The vim2m device is interesting to simulate a webcam. As most
sensors are arranged using bayer formats, the best is to support
to output data using those formats.

So, add support for them.

All 4 8-bit bayer formats tested with:

	$ qvidcap -p &
	$ v4l2-ctl --stream-mmap --stream-out-mmap --stream-to-host localhost --stream-lossless --stream-out-hor-speed 1 -v pixelformat=RGGB

It was tested also with GStreamer with:

	$ gst-validate-1.0 filesrc location=some_video.mp4 ! qtdemux ! avdec_h264 ! videoconvert ! videoscale ! v4l2convert disable-passthrough=1 extra-controls="s,horizontal_flip=0,vertical_flip=0" ! bayer2rgb ! videoconvert ! xvimagesink

For all possible HFLIP/VFLIP values.

Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
This commit is contained in:
Mauro Carvalho Chehab 2019-02-01 07:58:46 -05:00
parent 26b190053e
commit 1875a7c857
1 changed files with 97 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

104
drivers/media/platform/vim2m.c
View File

@ -82,24 +82,47 @@ static struct platform_device vim2m_pdev = {
struct vim2m_fmt {
u32 fourcc;
int depth;
/* Types the format can be used for */
u32 types;
};
static struct vim2m_fmt formats[] = {
{
.fourcc = V4L2_PIX_FMT_RGB565, /* rrrrrggg gggbbbbb */
.depth = 16,
.types = MEM2MEM_CAPTURE | MEM2MEM_OUTPUT,
}, {
.fourcc = V4L2_PIX_FMT_RGB565X, /* gggbbbbb rrrrrggg */
.depth = 16,
.types = MEM2MEM_CAPTURE | MEM2MEM_OUTPUT,
}, {
.fourcc = V4L2_PIX_FMT_RGB24,
.depth = 24,
.types = MEM2MEM_CAPTURE | MEM2MEM_OUTPUT,
}, {
.fourcc = V4L2_PIX_FMT_BGR24,
.depth = 24,
.types = MEM2MEM_CAPTURE | MEM2MEM_OUTPUT,
}, {
.fourcc = V4L2_PIX_FMT_YUYV,
.depth = 16,
.types = MEM2MEM_CAPTURE | MEM2MEM_OUTPUT,
}, {
.fourcc = V4L2_PIX_FMT_SBGGR8,
.depth = 8,
.types = MEM2MEM_CAPTURE,
}, {
.fourcc = V4L2_PIX_FMT_SGBRG8,
.depth = 8,
.types = MEM2MEM_CAPTURE,
}, {
.fourcc = V4L2_PIX_FMT_SGRBG8,
.depth = 8,
.types = MEM2MEM_CAPTURE,
}, {
.fourcc = V4L2_PIX_FMT_SRGGB8,
.depth = 8,
.types = MEM2MEM_CAPTURE,
},
};
@ -208,7 +231,7 @@ static struct vim2m_q_data *get_q_data(struct vim2m_ctx *ctx,
(u8)(((__color) > 0xff) ? 0xff : (((__color) < 0) ? 0 : (__color)))
static void copy_two_pixels(struct vim2m_fmt *in, struct vim2m_fmt *out,
u8 **src, u8 **dst, bool reverse)
u8 **src, u8 **dst, int ypos, bool reverse)
{
u8 _r[2], _g[2], _b[2], *r, *g, *b;
int i, step;
@ -379,7 +402,8 @@ static void copy_two_pixels(struct vim2m_fmt *in, struct vim2m_fmt *out,
*(*dst)++ = *r++;
}
return;
default: /* V4L2_PIX_FMT_YUYV */
case V4L2_PIX_FMT_YUYV:
default:
{
u8 y, y1, u, v;
@ -399,6 +423,42 @@ static void copy_two_pixels(struct vim2m_fmt *in, struct vim2m_fmt *out,
*(*dst)++ = v;
return;
}
case V4L2_PIX_FMT_SBGGR8:
if (!(ypos & 1)) {
*(*dst)++ = *b;
*(*dst)++ = *++g;
} else {
*(*dst)++ = *g;
*(*dst)++ = *++r;
}
return;
case V4L2_PIX_FMT_SGBRG8:
if (!(ypos & 1)) {
*(*dst)++ = *g;
*(*dst)++ = *++b;
} else {
*(*dst)++ = *r;
*(*dst)++ = *++g;
}
return;
case V4L2_PIX_FMT_SGRBG8:
if (!(ypos & 1)) {
*(*dst)++ = *g;
*(*dst)++ = *++r;
} else {
*(*dst)++ = *b;
*(*dst)++ = *++g;
}
return;
case V4L2_PIX_FMT_SRGGB8:
if (!(ypos & 1)) {
*(*dst)++ = *r;
*(*dst)++ = *++g;
} else {
*(*dst)++ = *g;
*(*dst)++ = *++b;
}
return;
}
}
@ -409,7 +469,7 @@ static int device_process(struct vim2m_ctx *ctx,
struct vim2m_dev *dev = ctx->dev;
struct vim2m_q_data *q_data_in, *q_data_out;
u8 *p_in, *p, *p_out;
int width, height, bytesperline, x, y, start, end, step;
int width, height, bytesperline, x, y, y_out, start, end, step;
struct vim2m_fmt *in, *out;
q_data_in = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_OUTPUT);
@ -443,13 +503,14 @@ static int device_process(struct vim2m_ctx *ctx,
end = height;
step = 1;
}
for (y = start; y != end; y += step) {
y_out = 0;
for (y = start; y != end; y += step, y_out++) {
p = p_in + (y * bytesperline);
if (ctx->mode & MEM2MEM_HFLIP)
p += bytesperline - (q_data_in->fmt->depth >> 3);
for (x = 0; x < width >> 1; x++)
copy_two_pixels(in, out, &p, &p_out,
copy_two_pixels(in, out, &p, &p_out, y_out,
ctx->mode & MEM2MEM_HFLIP);
}
@ -563,11 +624,27 @@ static int vidioc_querycap(struct file *file, void *priv,
static int enum_fmt(struct v4l2_fmtdesc *f, u32 type)
{
int i, num;
struct vim2m_fmt *fmt;
if (f->index < NUM_FORMATS) {
num = 0;
for (i = 0; i < NUM_FORMATS; ++i) {
if (formats[i].types & type) {
/* index-th format of type type found ? */
if (num == f->index)
break;
/*
* Correct type but haven't reached our index yet,
* just increment per-type index
*/
++num;
}
}
if (i < NUM_FORMATS) {
/* Format found */
fmt = &formats[f->index];
fmt = &formats[i];
f->pixelformat = fmt->fourcc;
return 0;
}
@ -658,6 +735,12 @@ static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
f->fmt.pix.pixelformat = formats[0].fourcc;
fmt = find_format(f);
}
if (!(fmt->types & MEM2MEM_CAPTURE)) {
v4l2_err(&ctx->dev->v4l2_dev,
"Fourcc format (0x%08x) invalid.\n",
f->fmt.pix.pixelformat);
return -EINVAL;
}
f->fmt.pix.colorspace = ctx->colorspace;
f->fmt.pix.xfer_func = ctx->xfer_func;
f->fmt.pix.ycbcr_enc = ctx->ycbcr_enc;
@ -670,12 +753,19 @@ static int vidioc_try_fmt_vid_out(struct file *file, void *priv,
struct v4l2_format *f)
{
struct vim2m_fmt *fmt;
struct vim2m_ctx *ctx = file2ctx(file);
fmt = find_format(f);
if (!fmt) {
f->fmt.pix.pixelformat = formats[0].fourcc;
fmt = find_format(f);
}
if (!(fmt->types & MEM2MEM_OUTPUT)) {
v4l2_err(&ctx->dev->v4l2_dev,
"Fourcc format (0x%08x) invalid.\n",
f->fmt.pix.pixelformat);
return -EINVAL;
}
if (!f->fmt.pix.colorspace)
f->fmt.pix.colorspace = V4L2_COLORSPACE_REC709;