You guys with more experience could tell me why this strange behavior
with my app.
First of all, I built my app from a code well known in the Video For
Linux spec. It is a capture example.
1º - Why is this /* Buggy driver paranoia. */?
min = fmt.fmt.pix.width * 2;
if (fmt.fmt.pix.bytesperline < min)
fmt.fmt.pix.bytesperline = min;
min = fmt.fmt.pix.bytesperline * fmt.fmt.pix.height;
if (fmt.fmt.pix.sizeimage < min)
fmt.fmt.pix.sizeimage = min;
2º - I am using libv4l, and using the V4L2_PIX_FMT_SBGGR8 pixelformat in order
to get 640x480 of resolution. Otherwise I get only 160x120!
This is where the problem lies, I can´t get a good image, I am actually
getting no more than fuzzy image. So I presumed that I am geting smth else
from the buffer instead of the data I should get. I started checking the parameters and plz,
have a look at this wierd response:
fmt.fmt.pix.width: 640 <- Fine
fmt.fmt.pix.height: 480 <- Fine
fmt.fmt.pix.bytesperline: 1920 <- How comes ? It is 3 times more, in the SBGGR8 pixelformat each pixel is 1 byte!
fmt.fmt.pix.sizeimage: 921600 <- The image is (fmt.fmt.pix.bytesperline * fmt.fmt.pix.height)
I believe that this sizeimage should be set to 307200, representing 640 * 480.
Is there someone familiar with this problem and how to solve it??
Great regards.
Guilherme Longo
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