mirror/opencv
1
0
Fork 0
mirror of https://github.com/opencv/opencv.git synced 2025-06-07 17:44:04 +08:00
Code Issues Actions Packages Projects Releases Wiki Activity

Merge pull request #25249 from carabsc:cara_changes

Browse Source 
Added support for V4L2_PIX_FMT_SGRBG8 pixel format to V4L2 backend
This commit is contained in:
Alexander Smorkalov 2024-03-25 10:55:36 +03:00 committed by GitHub
commit aa5f7727d8
No known key found for this signature in database
GPG Key ID: B5690EEEBB952194
1 changed files with 94 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

94
modules/videoio/src/cap_v4l.cpp
View File

@ -613,6 +613,7 @@ bool CvCaptureCAM_V4L::autosetup_capture_mode_v4l2()
V4L2_PIX_FMT_NV21,
V4L2_PIX_FMT_SBGGR8,
V4L2_PIX_FMT_SGBRG8,
V4L2_PIX_FMT_SGRBG8,
V4L2_PIX_FMT_XBGR32,
V4L2_PIX_FMT_ABGR32,
V4L2_PIX_FMT_SN9C10X,
@ -679,6 +680,7 @@ bool CvCaptureCAM_V4L::convertableToRgb() const
case V4L2_PIX_FMT_SBGGR8:
case V4L2_PIX_FMT_SN9C10X:
case V4L2_PIX_FMT_SGBRG8:
case V4L2_PIX_FMT_SGRBG8:
case V4L2_PIX_FMT_RGB24:
case V4L2_PIX_FMT_Y16:
case V4L2_PIX_FMT_Y16_BE:
@ -1487,6 +1489,94 @@ static void sgbrg2rgb24(long int WIDTH, long int HEIGHT, unsigned char *src, uns
}
}
// SGRBG to RGB24
static void sgrbg2rgb24(long int WIDTH, long int HEIGHT, unsigned char *src, unsigned char *dst)
{
long int i;
unsigned char *rawpt, *scanpt;
long int size;
rawpt = src;
scanpt = dst;
size = WIDTH*HEIGHT;
for ( i = 0; i < size; i++ )
{
if ( (i/WIDTH) % 2 == 0 ) //even row
{
if ( (i % 2) == 0 ) //even pixel
{
if ( (i > WIDTH) && ((i % WIDTH) > 0) )
{
*scanpt++ = (*(rawpt-WIDTH) + *(rawpt+WIDTH))/2; /* R */
*scanpt++ = *(rawpt); /* G */
*scanpt++ = (*(rawpt-1)+*(rawpt+1))/2; /* B */
} else
{
/* first line or left column */
*scanpt++ = *(rawpt+WIDTH); /* R */
*scanpt++ = *(rawpt); /* G */
*scanpt++ = *(rawpt+1); /* B */
}
} else //odd pixel
{
if ( (i > WIDTH) && ((i % WIDTH) < (WIDTH-1)) )
{
*scanpt++ = (*(rawpt-WIDTH-1) + *(rawpt-WIDTH+1) +
*(rawpt+WIDTH-1) + *(rawpt+WIDTH+1)) / 4; /* R */
*scanpt++ = (*(rawpt-1) + *(rawpt+1) +
*(rawpt-WIDTH) + *(rawpt+WIDTH)) / 4; /* G */
*scanpt++ = *(rawpt); /* B */
} else
{
/* first line or right column */
*scanpt++ = *(rawpt+WIDTH-1); /* R */
*scanpt++ = (*(rawpt-1)+*(rawpt+WIDTH))/2; /* G */
*scanpt++ = *(rawpt); /* B */
}
}
} else
{ //odd row
if ( (i % 2) == 0 ) //even pixel
{
if ( (i < (WIDTH*(HEIGHT-1))) && ((i % WIDTH) > 0) )
{
*scanpt++ = *(rawpt); /* R */
*scanpt++ = (*(rawpt-1) + *(rawpt+1)+
*(rawpt-WIDTH) + *(rawpt+WIDTH)) / 4; /* G */
*scanpt++ = (*(rawpt-WIDTH-1) + *(rawpt-WIDTH+1) +
*(rawpt+WIDTH-1) + *(rawpt+WIDTH+1)) / 4; /* B */
} else
{
/* bottom line or left column */
*scanpt++ = *(rawpt); /* R */
*scanpt++ = (*(rawpt+1)+*(rawpt-WIDTH))/2; /* G */
*scanpt++ = *(rawpt-WIDTH+1); /* B */
}
} else
{ //odd pixel
if ( i < (WIDTH*(HEIGHT-1)) && ((i % WIDTH) < (WIDTH-1)) )
{
*scanpt++ = (*(rawpt-1)+*(rawpt+1))/2; /* R */
*scanpt++ = *(rawpt); /* G */
*scanpt++ = (*(rawpt-WIDTH)+*(rawpt+WIDTH))/2; /* B */
} else
{
/* bottom line or right column */
*scanpt++ = (*(rawpt-1)); /* R */
*scanpt++ = *(rawpt); /* G */
*scanpt++ = (*(rawpt-WIDTH)); /* B */
}
}
}
rawpt++;
}
}
#define CLAMP(x) ((x)<0?0:((x)>255)?255:(x))
typedef struct {
@ -1706,6 +1796,10 @@ void CvCaptureCAM_V4L::convertToRgb(const Buffer &currentBuffer)
sgbrg2rgb24(imageSize.width, imageSize.height,
start, (unsigned char*)frame.imageData);
return;
case V4L2_PIX_FMT_SGRBG8:
sgrbg2rgb24(imageSize.width, imageSize.height,
start, (unsigned char*)frame.imageData);
return;
default:
break;
}