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bayer2rgb: handle other bayer formats

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This commit is contained in:
David Schleef 2010-06-03 18:14:05 -07:00
parent 2db6d968d8
commit 90a2cd5cc5
1 changed files with 62 additions and 37 deletions
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99
gst/bayer/gstbayer2rgb.c
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@ -85,6 +85,15 @@
#define GST_CAT_DEFAULT gst_bayer2rgb_debug
GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFAULT);
enum
{
GST_BAYER_2_RGB_FORMAT_BGGR = 0,
GST_BAYER_2_RGB_FORMAT_GBRG,
GST_BAYER_2_RGB_FORMAT_GRBG,
GST_BAYER_2_RGB_FORMAT_RGGB
};
#define GST_TYPE_BAYER2RGB (gst_bayer2rgb_get_type())
#define GST_BAYER2RGB(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_BAYER2RGB,GstBayer2RGB))
#define GST_IS_BAYER2RGB(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_BAYER2RGB))
@ -108,6 +117,7 @@ struct _GstBayer2RGB
int r_off; /* offset for red */
int g_off; /* offset for green */
int b_off; /* offset for blue */
int format;
};
struct _GstBayer2RGBClass
@ -252,29 +262,43 @@ static gboolean
gst_bayer2rgb_set_caps (GstBaseTransform * base, GstCaps * incaps,
GstCaps * outcaps)
{
GstBayer2RGB *filter = GST_BAYER2RGB (base);
GstBayer2RGB *bayer2rgb = GST_BAYER2RGB (base);
GstStructure *structure;
int val, bpp;
const char *format;
GST_DEBUG ("in caps %" GST_PTR_FORMAT " out caps %" GST_PTR_FORMAT, incaps,
outcaps);
structure = gst_caps_get_structure (incaps, 0);
gst_structure_get_int (structure, "width", &filter->width);
gst_structure_get_int (structure, "height", &filter->height);
filter->stride = GST_ROUND_UP_4 (filter->width);
gst_structure_get_int (structure, "width", &bayer2rgb->width);
gst_structure_get_int (structure, "height", &bayer2rgb->height);
bayer2rgb->stride = GST_ROUND_UP_4 (bayer2rgb->width);
format = gst_structure_get_string (structure, "format");
if (g_str_equal (format, "bggr")) {
bayer2rgb->format = GST_BAYER_2_RGB_FORMAT_BGGR;
} else if (g_str_equal (format, "gbrg")) {
bayer2rgb->format = GST_BAYER_2_RGB_FORMAT_GBRG;
} else if (g_str_equal (format, "grbg")) {
bayer2rgb->format = GST_BAYER_2_RGB_FORMAT_GRBG;
} else if (g_str_equal (format, "rggb")) {
bayer2rgb->format = GST_BAYER_2_RGB_FORMAT_RGGB;
} else {
return FALSE;
}
/* To cater for different RGB formats, we need to set params for later */
structure = gst_caps_get_structure (outcaps, 0);
gst_structure_get_int (structure, "bpp", &bpp);
filter->pixsize = bpp / 8;
bayer2rgb->pixsize = bpp / 8;
gst_structure_get_int (structure, "red_mask", &val);
filter->r_off = get_pix_offset (val, bpp);
bayer2rgb->r_off = get_pix_offset (val, bpp);
gst_structure_get_int (structure, "green_mask", &val);
filter->g_off = get_pix_offset (val, bpp);
bayer2rgb->g_off = get_pix_offset (val, bpp);
gst_structure_get_int (structure, "blue_mask", &val);
filter->b_off = get_pix_offset (val, bpp);
bayer2rgb->b_off = get_pix_offset (val, bpp);
return TRUE;
}
@ -364,6 +388,25 @@ gst_bayer2rgb_get_unit_size (GstBaseTransform * base, GstCaps * caps,
#define BLUE 2 /* Pure blue element */
#define GREENR 3 /* Green element which is on a red line */
static int
get_pixel_type (GstBayer2RGB * filter, int x, int y)
{
int type;
if (((x ^ filter->format) & 1)) {
if ((y ^ (filter->format >> 1)) & 1)
type = RED;
else
type = GREENB;
} else {
if ((y ^ (filter->format >> 1)) & 1)
type = GREENR;
else
type = BLUE;
}
return type;
}
/* Routine to generate the top and bottom edges (not including corners) */
static void
hborder (uint8_t * input, uint8_t * output, int bot_top,
@ -463,23 +506,15 @@ vborder (uint8_t * input, uint8_t * output, int right_left,
static void
do_row0_col0 (uint8_t * input, uint8_t * output, GstBayer2RGB * filter)
{
int type;
/* Horizontal edges */
hborder (input, output, 0, GREENB, filter);
if (filter->height & 1)
type = GREENB; /* odd # rows, "bottom" edge same as top */
else
type = RED; /* even #, bottom side different */
hborder (input, output, 1, type, filter);
hborder (input, output, 0, get_pixel_type (filter, 1, 0), filter);
hborder (input, output, 1, get_pixel_type (filter, 1, filter->height - 1),
filter);
/* Vertical edges */
vborder (input, output, 0, GREENR, filter);
if (filter->width & 1)
type = GREENR; /* odd # cols, "right" edge same as left */
else
type = RED; /* even #, right side different */
vborder (input, output, 1, type, filter);
vborder (input, output, 0, get_pixel_type (filter, 0, 1), filter);
vborder (input, output, 1, get_pixel_type (filter, filter->width - 1, 1),
filter);
}
static void
@ -520,24 +555,17 @@ corner (uint8_t * input, uint8_t * output, int x, int y,
static void
do_corners (uint8_t * input, uint8_t * output, GstBayer2RGB * filter)
{
int typ;
/* Top left */
corner (input, output, 0, 0, 1, 1, BLUE, filter);
corner (input, output, 0, 0, 1, 1, get_pixel_type (filter, 0, 0), filter);
/* Bottom left */
corner (input, output, 0, filter->height - 1, 1, -1,
(filter->height & 1) ? BLUE : GREENR, filter);
get_pixel_type (filter, 0, filter->height - 1), filter);
/* Top right */
corner (input, output, filter->width - 1, 0, -1, 0,
(filter->width & 1) ? BLUE : GREENB, filter);
get_pixel_type (filter, filter->width - 1, 0), filter);
/* Bottom right */
if (filter->width & 1) /* if odd # cols, B or GB */
typ = BLUE;
else
typ = GREENB; /* if even # cols, B or GR */
typ |= (filter->height & 1); /* if odd # rows, GB or GR */
corner (input, output, filter->width - 1, filter->height - 1, -1, -1,
typ, filter);
get_pixel_type (filter, filter->width - 1, filter->height - 1), filter);
}
static void
@ -563,10 +591,7 @@ do_body (uint8_t * input, uint8_t * output, GstBayer2RGB * filter)
* the pixel at position (1,1). Assuming BG format, this should
* be RED for odd-numbered rows and GREENB for even rows.
*/
if (h & 1)
type = RED;
else
type = GREENB;
type = get_pixel_type (filter, 1, h);
/* Calculate the starting position for the row */
op = h * filter->width * filter->pixsize; /* output (converted) pos */
ip = h * filter->stride; /* input (bayer data) pos */