mirror of
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Initial commit
This commit is contained in:
FliegendeWurst
commit
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||||||
|
checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
|
||||||
12
Cargo.toml
Normal file
12
Cargo.toml
Normal file
@ -0,0 +1,12 @@
|
|||||||
|
[package]
|
||||||
|
name = "v4l-save-image"
|
||||||
|
version = "0.1.0"
|
||||||
|
authors = ["FliegendeWurst <2012gdwu@web.de>"]
|
||||||
|
edition = "2018"
|
||||||
|
|
||||||
|
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
|
||||||
|
|
||||||
|
[dependencies]
|
||||||
|
v4l = "0.4.0"
|
||||||
|
image = "0.23.4"
|
||||||
|
chrono = "0.4.11"
|
||||||
61
src/main.rs
Normal file
61
src/main.rs
Normal file
@ -0,0 +1,61 @@
|
|||||||
|
use chrono::{Datelike, Local, Timelike};
|
||||||
|
use image::{ImageBuffer, Rgb};
|
||||||
|
use v4l::{Buffer, CaptureDevice, CaptureFormat, FourCC, MappedBufferStream};
|
||||||
|
|
||||||
|
use std::time::Instant;
|
||||||
|
|
||||||
|
fn main() {
|
||||||
|
// Determine which device to use
|
||||||
|
let path: String = "/dev/video0".to_owned();
|
||||||
|
println!("Using device: {}\n", path);
|
||||||
|
|
||||||
|
let count = 1;
|
||||||
|
|
||||||
|
// Allocate 4 buffers by default
|
||||||
|
let buffers = 4;
|
||||||
|
|
||||||
|
let mut dev = CaptureDevice::with_path(path).expect("Failed to open device");
|
||||||
|
println!("{:?}", dev.enumerate_formats());
|
||||||
|
println!("{:?}", dev.set_format(&CaptureFormat::new(640, 480, FourCC::new(b"RGB3"))));
|
||||||
|
let params = dev.get_params().expect("Failed to get parameters");
|
||||||
|
println!("Active format:\n{}", dev.get_format().unwrap());
|
||||||
|
println!("Active parameters:\n{}", params);
|
||||||
|
|
||||||
|
// Setup a buffer stream and grab a frame, then print its data
|
||||||
|
let mut stream = MappedBufferStream::with_buffers(&mut dev, buffers)
|
||||||
|
.expect("Failed to create buffer stream");
|
||||||
|
|
||||||
|
// warmup
|
||||||
|
stream.next().expect("Failed to capture buffer");
|
||||||
|
|
||||||
|
let start = Instant::now();
|
||||||
|
let mut megabytes_ps: f64 = 0.0;
|
||||||
|
for i in 0..count {
|
||||||
|
let t0 = Instant::now();
|
||||||
|
let buf = stream.next().expect("Failed to capture buffer");
|
||||||
|
let duration_us = t0.elapsed().as_micros();
|
||||||
|
|
||||||
|
let cur = buf.len() as f64 / 1_048_576.0 * 1_000_000.0 / duration_us as f64;
|
||||||
|
if i == 0 {
|
||||||
|
megabytes_ps = cur;
|
||||||
|
} else {
|
||||||
|
// ignore the first measurement
|
||||||
|
let prev = megabytes_ps * (i as f64 / (i + 1) as f64);
|
||||||
|
let now = cur * (1.0 / (i + 1) as f64);
|
||||||
|
megabytes_ps = prev + now;
|
||||||
|
}
|
||||||
|
|
||||||
|
println!("Buffer");
|
||||||
|
println!(" sequence : {}", buf.seq());
|
||||||
|
println!(" timestamp : {}", buf.timestamp());
|
||||||
|
println!(" flags : {}", buf.flags());
|
||||||
|
println!(" length : {}", buf.len());
|
||||||
|
let now = Local::now();
|
||||||
|
let img: ImageBuffer<Rgb<u8>, _> = ImageBuffer::from_vec(640, 480, buf.data().to_vec()).unwrap();
|
||||||
|
img.save(format!("image_{}-{:02}-{:02}_{:02}-{:02}-{:02}.jpg", now.year(), now.month(), now.day(), now.hour(), now.minute(), now.second())).unwrap();
|
||||||
|
}
|
||||||
|
|
||||||
|
println!();
|
||||||
|
println!("FPS: {}", count as f64 / start.elapsed().as_secs_f64());
|
||||||
|
println!("MB/s: {}", megabytes_ps);
|
||||||
|
}
|
||||||
Loading…
Reference in New Issue
Block a user