tami/thermalcam_decoder
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devdesk 2024-02-23 01:54:56 +02:00
parent bfaa0eca2f
commit 39551f3794
1 changed files with 12 additions and 11 deletions
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23
src/stream.rs
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@ -10,11 +10,6 @@ use std::{
}; };
use v4l::video::Output; use v4l::video::Output;
const MIN_CUTOFF: f64 = 26.0;
const MAX_CUTOFF: f64 = 36.0;
const MID_CUTOFF: f64 = (MIN_CUTOFF + MAX_CUTOFF) / 2.0;
const RANGE_CUTOFF: f64 = MAX_CUTOFF - MIN_CUTOFF;
#[derive(Parser, Debug)] #[derive(Parser, Debug)]
#[command(version, about, long_about = None)] #[command(version, about, long_about = None)]
struct Args { struct Args {
@ -58,13 +53,17 @@ fn rgb_to_u8s(rgb: &RGB) -> (u8, u8, u8) {
} }
pub(crate) struct Streamer { pub(crate) struct Streamer {
pub(crate) cutoff: Option<f64>, pub(crate) min_cutoff: f64,
pub(crate) max_cutoff: f64,
pub(crate) freq_hz: f64,
} }
pub(crate) fn initialize() -> Arc<Mutex<Streamer>> { pub(crate) fn initialize() -> Arc<Mutex<Streamer>> {
let args = Args::parse(); let args = Args::parse();
Arc::new(Mutex::new(Streamer { Arc::new(Mutex::new(Streamer {
cutoff: args.red_cutoff, min_cutoff: args.red_cutoff.unwrap_or(26.),
max_cutoff: args.red_cutoff.unwrap_or(26.) + 10.0,
freq_hz: 1.0,
})) }))
} }
@ -97,8 +96,7 @@ fn main(streamer: Arc<Mutex<Streamer>>) -> anyhow::Result<()> {
.duration_since(SystemTime::UNIX_EPOCH) .duration_since(SystemTime::UNIX_EPOCH)
.unwrap() .unwrap()
.as_secs_f64(); .as_secs_f64();
let cutoff = streamer.lock().unwrap().cutoff; let greyscale = !args.temperature;
let greyscale = !args.temperature || cutoff.is_none();
let fourcc_repr = if greyscale { let fourcc_repr = if greyscale {
[ [
b'Y', // | 0b10000000 b'Y', // | 0b10000000
@ -153,13 +151,16 @@ fn main(streamer: Arc<Mutex<Streamer>>) -> anyhow::Result<()> {
{ {
if len == FRAME_LEN { if len == FRAME_LEN {
// read once per frame, can make it lower if need be // read once per frame, can make it lower if need be
// let cutoff = streamer.lock().unwrap().cutoff.unwrap_or(0.0); let state = streamer.lock().unwrap();
let mid = (state.min_cutoff + state.max_cutoff) / 2.0;
let range = state.max_cutoff - state.min_cutoff;
let hz = state.freq_hz;
let now = SystemTime::now() let now = SystemTime::now()
.duration_since(SystemTime::UNIX_EPOCH) .duration_since(SystemTime::UNIX_EPOCH)
.unwrap() .unwrap()
.as_secs_f64(); .as_secs_f64();
let dt = now - start; let dt = now - start;
let cutoff = MID_CUTOFF + f64::sin(dt / 2.0) * 0.5 * RANGE_CUTOFF; let cutoff = mid + f64::sin(dt / hz) * 0.5 * range;
// swap the bytes, we are using LE, not BE, 16 bit grayscale // swap the bytes, we are using LE, not BE, 16 bit grayscale
// possibly limitation of current v4l2loopback or v4l rust wrapper or libv4l2 // possibly limitation of current v4l2loopback or v4l rust wrapper or libv4l2
for i in 0..FRAME_LEN / 2 { for i in 0..FRAME_LEN / 2 {