tami/thermalcam_decoder
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correct for rotation and axes for greyscale

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This commit is contained in:
devdesk 2024-02-19 22:31:07 +02:00
parent 2ba4528c1d
commit e43f8b0efb
1 changed files with 8 additions and 3 deletions
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11
examples/live.rs
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@ -67,7 +67,8 @@ fn main() -> anyhow::Result<()> {
let mut out = v4l::Device::with_path(output)?;
// To find the fourcc code, use v4l2-ctl --list-formats-out /dev/video0
// (or read the source :)
let format = v4l::Format::new(WIDTH as u32, HEIGHT as u32, fourcc);
// flip axes
let format = v4l::Format::new(HEIGHT as u32, WIDTH as u32, fourcc);
Output::set_format(&out, &format)?;
// Setup Capture
@ -105,13 +106,16 @@ fn main() -> anyhow::Result<()> {
// swap the bytes, we are using LE, not BE, 16 bit grayscale
// possibly limitation of current v4l2loopback or v4l rust wrapper or libv4l2
for i in 0..FRAME_LEN / 2 {
let x = i % WIDTH;
let y = (i / WIDTH) % HEIGHT;
let mut pixel = u16::from_be_bytes([frame[i * 2], frame[i * 2 + 1]]);
if greyscale {
if args.temperature {
pixel = pixel_to_celcius(pixel);
}
let pixel_swapped = pixel.to_le_bytes();
swapped[i * 2..i * 2 + 2].copy_from_slice(&pixel_swapped);
let out_i = ((HEIGHT - 1 - y) + (WIDTH - 1 - x) * HEIGHT) * 2;
swapped[out_i..out_i + 2].copy_from_slice(&pixel_swapped);
} else {
pixel = pixel_to_celcius(pixel);
let cutoff = args.red_cutoff.unwrap();
@ -122,7 +126,8 @@ fn main() -> anyhow::Result<()> {
};
let g = frame[i * 2];
let b = frame[i * 2 + 1];
swapped[i * 4..i * 4 + 4].copy_from_slice(&[0, r, g, b]);
let out_i = (y + x * HEIGHT) * 2;
swapped[out_i..out_i + 4].copy_from_slice(&[0, r, g, b]);
}
}
out.write_all(&swapped[..])?;