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simplify autosetup_capture_mode_v4l2 by using a for loop

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This commit is contained in:
Pavel Rojtberg 2015-10-10 12:39:37 +02:00
parent 5525cc4d09
commit 588eba3b37
1 changed files with 27 additions and 64 deletions
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91
modules/videoio/src/cap_v4l.cpp
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@ -422,24 +422,20 @@ try_palette(int fd,
#ifdef HAVE_CAMV4L2
static int try_palette_v4l2(CvCaptureCAM_V4L* capture, unsigned long colorspace)
static bool try_palette_v4l2(CvCaptureCAM_V4L* capture)
{
CLEAR (capture->form);
capture->form.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
capture->form.fmt.pix.pixelformat = colorspace;
capture->form.fmt.pix.pixelformat = capture->palette;
capture->form.fmt.pix.field = V4L2_FIELD_ANY;
capture->form.fmt.pix.width = capture->width;
capture->form.fmt.pix.height = capture->height;
if (-1 == ioctl (capture->deviceHandle, VIDIOC_S_FMT, &capture->form))
return -1;
return false;
if (colorspace != capture->form.fmt.pix.pixelformat)
return -1;
else
return 0;
return capture->palette == capture->form.fmt.pix.pixelformat;
}
#endif /* HAVE_CAMV4L2 */
@ -547,67 +543,34 @@ static int try_init_v4l2(CvCaptureCAM_V4L* capture, char *deviceName)
}
static int autosetup_capture_mode_v4l2(CvCaptureCAM_V4L* capture)
{
if (try_palette_v4l2(capture, V4L2_PIX_FMT_BGR24) == 0)
{
capture->palette = V4L2_PIX_FMT_BGR24;
}
else
if (try_palette_v4l2(capture, V4L2_PIX_FMT_YVU420) == 0)
{
capture->palette = V4L2_PIX_FMT_YVU420;
}
else
if (try_palette_v4l2(capture, V4L2_PIX_FMT_YUV411P) == 0)
{
capture->palette = V4L2_PIX_FMT_YUV411P;
}
else
static int autosetup_capture_mode_v4l2(CvCaptureCAM_V4L* capture) {
__u32 try_order[] = {
V4L2_PIX_FMT_BGR24,
V4L2_PIX_FMT_YVU420,
V4L2_PIX_FMT_YUV411P,
#ifdef HAVE_JPEG
if (try_palette_v4l2(capture, V4L2_PIX_FMT_MJPEG) == 0 ||
try_palette_v4l2(capture, V4L2_PIX_FMT_JPEG) == 0)
{
capture->palette = V4L2_PIX_FMT_MJPEG;
}
else
V4L2_PIX_FMT_MJPEG,
V4L2_PIX_FMT_JPEG,
#endif
V4L2_PIX_FMT_YUYV,
V4L2_PIX_FMT_UYVY,
V4L2_PIX_FMT_SN9C10X,
V4L2_PIX_FMT_SBGGR8,
V4L2_PIX_FMT_SGBRG8,
V4L2_PIX_FMT_RGB24
};
if (try_palette_v4l2(capture, V4L2_PIX_FMT_YUYV) == 0)
{
capture->palette = V4L2_PIX_FMT_YUYV;
}
else if (try_palette_v4l2(capture, V4L2_PIX_FMT_UYVY) == 0)
{
capture->palette = V4L2_PIX_FMT_UYVY;
}
else
if (try_palette_v4l2(capture, V4L2_PIX_FMT_SN9C10X) == 0)
{
capture->palette = V4L2_PIX_FMT_SN9C10X;
} else
if (try_palette_v4l2(capture, V4L2_PIX_FMT_SBGGR8) == 0)
{
capture->palette = V4L2_PIX_FMT_SBGGR8;
} else
if (try_palette_v4l2(capture, V4L2_PIX_FMT_SGBRG8) == 0)
{
capture->palette = V4L2_PIX_FMT_SGBRG8;
}
else if (try_palette_v4l2(capture, V4L2_PIX_FMT_RGB24) == 0)
{
capture->palette = V4L2_PIX_FMT_RGB24;
}
else
{
fprintf(stderr, "VIDEOIO ERROR: V4L2: Pixel format of incoming image is unsupported by OpenCV\n");
for (size_t i = 0; i < sizeof(try_order) / sizeof(__u32); i++) {
capture->palette = try_order[i];
if (try_palette_v4l2(capture)) {
return 0;
}
}
fprintf(stderr,
"VIDEOIO ERROR: V4L2: Pixel format of incoming image is unsupported by OpenCV\n");
icvCloseCAM_V4L(capture);
return -1;
}
return 0;
}
#endif /* HAVE_CAMV4L2 */