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zeefaad
2026-06-16 10:26:16 +02:00
parent 2d49da5cee
commit 8efb9c031e
8 changed files with 795 additions and 45 deletions
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.gitignore vendored
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@ -1,2 +1,3 @@
/target /target
test.iq test.iq
test.py

520
Cargo.lock generated
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@ -150,6 +150,24 @@ dependencies = [
"zerocopy", "zerocopy",
] ]
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@ -2541,6 +2912,15 @@ version = "0.1.29"
source = "registry+https://github.com/rust-lang/crates.io-index" source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "e0c5ccf5294c6ccd63a74f1565028353830a9c2f5eb0c682c355c471726a6e3f" checksum = "e0c5ccf5294c6ccd63a74f1565028353830a9c2f5eb0c682c355c471726a6e3f"
[[package]]
name = "qoi"
version = "0.4.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "7f6d64c71eb498fe9eae14ce4ec935c555749aef511cca85b5568910d6e48001"
dependencies = [
"bytemuck",
]
[[package]] [[package]]
name = "quick-error" name = "quick-error"
version = "2.0.1" version = "2.0.1"
@ -2578,12 +2958,91 @@ version = "6.0.0"
source = "registry+https://github.com/rust-lang/crates.io-index" source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "f8dcc9c7d52a811697d2151c701e0d08956f92b0e24136cf4cf27b57a6a0d9bf" checksum = "f8dcc9c7d52a811697d2151c701e0d08956f92b0e24136cf4cf27b57a6a0d9bf"
[[package]]
name = "rand"
version = "0.9.4"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "44c5af06bb1b7d3216d91932aed5265164bf384dc89cd6ba05cf59a35f5f76ea"
dependencies = [
"rand_chacha",
"rand_core",
]
[[package]]
name = "rand_chacha"
version = "0.9.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "d3022b5f1df60f26e1ffddd6c66e8aa15de382ae63b3a0c1bfc0e4d3e3f325cb"
dependencies = [
"ppv-lite86",
"rand_core",
]
[[package]]
name = "rand_core"
version = "0.9.5"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "76afc826de14238e6e8c374ddcc1fa19e374fd8dd986b0d2af0d02377261d83c"
dependencies = [
"getrandom 0.3.4",
]
[[package]] [[package]]
name = "range-alloc" name = "range-alloc"
version = "0.1.5" version = "0.1.5"
source = "registry+https://github.com/rust-lang/crates.io-index" source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "ca45419789ae5a7899559e9512e58ca889e41f04f1f2445e9f4b290ceccd1d08" checksum = "ca45419789ae5a7899559e9512e58ca889e41f04f1f2445e9f4b290ceccd1d08"
[[package]]
name = "rav1e"
version = "0.8.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "43b6dd56e85d9483277cde964fd1bdb0428de4fec5ebba7540995639a21cb32b"
dependencies = [
"aligned-vec",
"arbitrary",
"arg_enum_proc_macro",
"arrayvec",
"av-scenechange",
"av1-grain",
"bitstream-io",
"built",
"cfg-if",
"interpolate_name",
"itertools",
"libc",
"libfuzzer-sys",
"log",
"maybe-rayon",
"new_debug_unreachable",
"noop_proc_macro",
"num-derive",
"num-traits",
"paste",
"profiling",
"rand",
"rand_chacha",
"simd_helpers",
"thiserror 2.0.18",
"v_frame",
"wasm-bindgen",
]
[[package]]
name = "ravif"
version = "0.13.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "e52310197d971b0f5be7fe6b57530dcd27beb35c1b013f29d66c1ad73fbbcc45"
dependencies = [
"avif-serialize",
"imgref",
"loop9",
"quick-error",
"rav1e",
"rayon",
"rgb",
]
[[package]] [[package]]
name = "raw-window-handle" name = "raw-window-handle"
version = "0.6.2" version = "0.6.2"
@ -2602,6 +3061,26 @@ dependencies = [
"objc2-quartz-core 0.3.2", "objc2-quartz-core 0.3.2",
] ]
[[package]]
name = "rayon"
version = "1.12.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "fb39b166781f92d482534ef4b4b1b2568f42613b53e5b6c160e24cfbfa30926d"
dependencies = [
"either",
"rayon-core",
]
[[package]]
name = "rayon-core"
version = "1.13.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "22e18b0f0062d30d4230b2e85ff77fdfe4326feb054b9783a3460d8435c8ab91"
dependencies = [
"crossbeam-deque",
"crossbeam-utils",
]
[[package]] [[package]]
name = "read-fonts" name = "read-fonts"
version = "0.37.0" version = "0.37.0"
@ -2645,6 +3124,12 @@ version = "1.1.0"
source = "registry+https://github.com/rust-lang/crates.io-index" source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "19b30a45b0cd0bcca8037f3d0dc3421eaf95327a17cad11964fb8179b4fc4832" checksum = "19b30a45b0cd0bcca8037f3d0dc3421eaf95327a17cad11964fb8179b4fc4832"
[[package]]
name = "rgb"
version = "0.8.53"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "47b34b781b31e5d73e9fbc8689c70551fd1ade9a19e3e28cfec8580a79290cc4"
[[package]] [[package]]
name = "rustc-hash" name = "rustc-hash"
version = "1.1.0" version = "1.1.0"
@ -2830,6 +3315,15 @@ dependencies = [
"simdutf8", "simdutf8",
] ]
[[package]]
name = "simd_helpers"
version = "0.1.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "95890f873bec569a0362c235787f3aca6e1e887302ba4840839bcc6459c42da6"
dependencies = [
"quote",
]
[[package]] [[package]]
name = "simdutf8" name = "simdutf8"
version = "0.1.5" version = "0.1.5"
@ -3252,6 +3746,17 @@ dependencies = [
"wasm-bindgen", "wasm-bindgen",
] ]
[[package]]
name = "v_frame"
version = "0.3.9"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "666b7727c8875d6ab5db9533418d7c764233ac9c0cff1d469aec8fa127597be2"
dependencies = [
"aligned-vec",
"num-traits",
"wasm-bindgen",
]
[[package]] [[package]]
name = "vello_common" name = "vello_common"
version = "0.0.6" version = "0.0.6"
@ -4264,6 +4769,12 @@ version = "0.8.28"
source = "registry+https://github.com/rust-lang/crates.io-index" source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "3ae8337f8a065cfc972643663ea4279e04e7256de865aa66fe25cec5fb912d3f" checksum = "3ae8337f8a065cfc972643663ea4279e04e7256de865aa66fe25cec5fb912d3f"
[[package]]
name = "y4m"
version = "0.8.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "7a5a4b21e1a62b67a2970e6831bc091d7b87e119e7f9791aef9702e3bef04448"
[[package]] [[package]]
name = "yoke" name = "yoke"
version = "0.8.3" version = "0.8.3"
@ -4470,6 +4981,15 @@ version = "0.5.1"
source = "registry+https://github.com/rust-lang/crates.io-index" source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "cb8a0807f7c01457d0379ba880ba6322660448ddebc890ce29bb64da71fb40f9" checksum = "cb8a0807f7c01457d0379ba880ba6322660448ddebc890ce29bb64da71fb40f9"
[[package]]
name = "zune-inflate"
version = "0.2.54"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "73ab332fe2f6680068f3582b16a24f90ad7096d5d39b974d1c0aff0125116f02"
dependencies = [
"simd-adler32",
]
[[package]] [[package]]
name = "zune-jpeg" name = "zune-jpeg"
version = "0.5.15" version = "0.5.15"

1
Cargo.toml
View File

@ -7,5 +7,6 @@ edition = "2024"
eframe = "0.34.3" eframe = "0.34.3"
egui = "0.34.3" egui = "0.34.3"
egui_plot = "0.35.0" egui_plot = "0.35.0"
image = "0.25.10"
indicatif = "0.18.4" indicatif = "0.18.4"
num-complex = "0.4.6" num-complex = "0.4.6"

45
src/frame.rs Normal file
View File

@ -0,0 +1,45 @@
use image::{GrayImage, Luma};
use std::fs;
use std::path::Path;
use crate::line_assembler::VideoFrame;
// PAL
const WIDTH: u32 = 1280;
const HEIGHT: u32 = 288;
pub fn save_frames(frames: &[VideoFrame], output_dir: &str, sig_min: f32, sig_max: f32) {
fs::create_dir_all(output_dir).expect("Could not create output directory");
let range = (sig_max - sig_min).max(1e-6);
let mut saved = 0;
for (i, frame) in frames.iter().enumerate() {
if frame.lines.is_empty() {
continue;
}
let mut img = GrayImage::new(WIDTH, HEIGHT);
for y in 0..HEIGHT as usize {
// If the frame has fewer lines than HEIGHT, fill the rest with black
let line = frame.lines.get(y);
for x in 0..WIDTH as usize {
let s = line
.and_then(|l| l.samples.get(x))
.copied()
.unwrap_or(sig_min);
let luma = ((s - sig_min) / range * 255.0).clamp(0.0, 255.0) as u8;
img.put_pixel(x as u32, y as u32, Luma([luma]));
}
}
let path = Path::new(output_dir).join(format!("frame_{:04}.png", i));
img.save(&path).expect("Could not save image");
saved += 1;
}
println!("{saved} image(s) saved to '{output_dir}/'");
}

58
src/line_assembler.rs Normal file
View File

@ -0,0 +1,58 @@
use crate::{fm_demod::Sample, sync::SyncEvent};
pub struct VideoLine {
pub samples: Vec<Sample>,
}
pub struct VideoFrame {
pub lines: Vec<VideoLine>,
}
pub struct LineAssembler<I> {
pub inner: I,
pub current_line: Vec<Sample>,
pub current_frame: Vec<VideoLine>,
}
impl<I> LineAssembler<I> {
pub fn new(inner: I) -> Self {
Self {
inner,
current_line: Vec::new(),
current_frame: Vec::new(),
}
}
}
impl<I, E> Iterator for LineAssembler<I>
where
I: Iterator<Item = Result<SyncEvent, E>>,
{
type Item = Result<VideoFrame, E>;
fn next(&mut self) -> Option<Self::Item> {
loop {
match self.inner.next()? {
Ok(SyncEvent::VideoSample(s)) => {
self.current_line.push(s);
}
Ok(SyncEvent::HSync) => {
// Save the finished line
let line = VideoLine {
samples: std::mem::take(&mut self.current_line),
};
self.current_frame.push(line);
}
Ok(SyncEvent::VSync) => {
// Frame finished
let frame = VideoFrame {
lines: std::mem::take(&mut self.current_frame),
};
return Some(Ok(frame));
}
Err(e) => return Some(Err(e)),
}
}
}
}

116
src/main.rs
View File

@ -1,5 +1,6 @@
use crate::fm_demod::Sample;
use crate::iq_reader::FileSource; use crate::iq_reader::FileSource;
use crate::pipeline::{AfterDemodPiplineExt, DspPipelineExt}; use crate::pipeline::{AfterDemodPiplineExt, DspPipelineExt, SyncPipelineExt};
use egui_plot::{Line, Plot}; use egui_plot::{Line, Plot};
use indicatif::ProgressIterator; use indicatif::ProgressIterator;
@ -7,59 +8,84 @@ mod agc;
mod dc_blocker; mod dc_blocker;
mod fir; mod fir;
mod fm_demod; mod fm_demod;
mod frame;
mod iq_reader; mod iq_reader;
mod line_assembler;
mod low_pass; mod low_pass;
mod pipeline; mod pipeline;
mod sync;
mod utils; mod utils;
fn main() -> eframe::Result { const SAMPLE_RATE: f32 = 20_000_000.0;
let source = FileSource::new("test.iq", 32769).unwrap(); const SYNC_THRESHOLD: f32 = -0.3;
let taps = [0.5; 64]; const LOWPASS_ALPHA: f32 = 0.6;
// fn main() -> eframe::Result {
fn main() {
let source = FileSource::new("test.iq", 32769).unwrap();
let samples: Vec<f32> = source let samples: Vec<f32> = source
.progress() .skip(10_000)
.agc(20_000_000.0, 1.0, 0.001, 100.0) .take(100_000)
//.fir::<64>(taps, 4) .agc(SAMPLE_RATE, 1.0, 0.001, 100.0)
.demodulate() .demodulate()
.dc_block(0.995) .dc_block(0.997)
.lowpass(0.75) .lowpass(LOWPASS_ALPHA)
.filter_map(|r| r.ok()) .filter_map(|r| r.ok())
.collect(); .collect();
eframe::run_ui_native("DSP", Default::default(), move |ui, _frame| { let min = samples.iter().cloned().fold(f32::INFINITY, f32::min);
egui::CentralPanel::default().show(ui, |ui| { let max = samples.iter().cloned().fold(f32::NEG_INFINITY, f32::max);
Plot::new("plot").show(ui, |plot_ui| { let mean: f32 = samples.iter().sum::<f32>() / samples.len() as f32;
plot_ui.line(Line::new(
"Signal",
samples
.iter()
.take(10000)
.enumerate()
.map(|(i, x)| [i as f64, *x as f64])
.collect::<Vec<_>>(),
))
})
});
})
}
// fn main() -> Result<(), Box<dyn Error>> { println!("min={:.3} max={:.3} mean={:.3}", min, max, mean);
// let source = FileSource::new("test.iq", 32769)?;
// let source = FileSource::new("test.iq", 32769).unwrap();
// // Fir coefs
// let taps = [0.5; 64]; // let taps = [0.5; 64];
//
// let pipeline = source let frames: Vec<_> = source
// .agc(20_000_000.0, 1.0, 0.001, 100.0) .take(50_000_000)
// .fir::<64>(taps, 4) .progress()
// .demodulate() .agc(SAMPLE_RATE, 1.0, 0.001, 100.0)
// .dc_block(0.995) .demodulate()
// .lowpass(0.75); .dc_block(0.997)
// .lowpass(LOWPASS_ALPHA)
// for s_r in pipeline { .sync_separate(SAMPLE_RATE, SYNC_THRESHOLD)
// let s = s_r?; .assemble_frames()
// println!("phase : {}", s); .filter_map(|r| r.ok())
// } .collect();
//
// Ok(()) println!("{} frames decoded", frames.len());
// }
frame::save_frames(&frames, "frames", min, max);
// let source2 = FileSource::new("test.iq", 32769).unwrap();
//
// let samples: Vec<Sample> = source2
// .skip(10_000)
// .take(10_000)
// .progress()
// .agc(20_000_000.0, 1.0, 0.001, 100.0)
// // .fir::<64>(taps, 4)
// .demodulate()
// .dc_block(0.997)
// .lowpass(0.75)
// .filter_map(|r| r.ok())
// .collect();
//
// eframe::run_ui_native("DSP", Default::default(), move |ui, _frame| {
// egui::CentralPanel::default().show(ui, |ui| {
// Plot::new("plot").show(ui, |plot_ui| {
// plot_ui.line(Line::new(
// "Signal",
// samples
// .iter()
// .take(10000)
// .enumerate()
// .map(|(i, x)| [i as f64, *x as f64])
// .collect::<Vec<_>>(),
// ))
// })
// });
// })
}

13
src/pipeline.rs
View File

@ -3,7 +3,9 @@ use crate::dc_blocker::DcBlocker;
use crate::fir::Fir; use crate::fir::Fir;
use crate::fm_demod::{FmDemod, Sample}; use crate::fm_demod::{FmDemod, Sample};
use crate::iq_reader::IqSample; use crate::iq_reader::IqSample;
use crate::line_assembler::LineAssembler;
use crate::low_pass::LowPass; use crate::low_pass::LowPass;
use crate::sync::{SyncEvent, SyncSeparator};
pub trait DspPipelineExt<E>: Iterator<Item = Result<IqSample, E>> + Sized { pub trait DspPipelineExt<E>: Iterator<Item = Result<IqSample, E>> + Sized {
fn agc(self, sample_rate: f32, target_power: f32, min_gain: f32, max_gain: f32) -> Agc<Self> { fn agc(self, sample_rate: f32, target_power: f32, min_gain: f32, max_gain: f32) -> Agc<Self> {
@ -29,6 +31,17 @@ pub trait AfterDemodPiplineExt<E>: Iterator<Item = Result<Sample, E>> + Sized {
fn lowpass(self, alpha: f32) -> LowPass<Self> { fn lowpass(self, alpha: f32) -> LowPass<Self> {
LowPass::new(self, alpha) LowPass::new(self, alpha)
} }
fn sync_separate(self, sample_rate: f32, sync_threshold: f32) -> SyncSeparator<Self> {
SyncSeparator::new(self, sample_rate, sync_threshold)
}
} }
impl<I, E> AfterDemodPiplineExt<E> for I where I: Iterator<Item = Result<Sample, E>> {} impl<I, E> AfterDemodPiplineExt<E> for I where I: Iterator<Item = Result<Sample, E>> {}
pub trait SyncPipelineExt<E>: Iterator<Item = Result<SyncEvent, E>> + Sized {
fn assemble_frames(self) -> LineAssembler<Self> {
LineAssembler::new(self)
}
}
impl<I, E> SyncPipelineExt<E> for I where I: Iterator<Item = Result<SyncEvent, E>> {}

86
src/sync.rs Normal file
View File

@ -0,0 +1,86 @@
use crate::fm_demod::Sample;
pub enum SyncState {
Active,
InPulse { count: usize },
}
pub enum SyncEvent {
HSync,
VSync,
VideoSample(Sample),
}
pub struct SyncSeparator<I> {
pub inner: I,
pub state: SyncState,
// Threshold for considering a pulse
pub sync_threshold: f32,
pub hsync_min: usize,
pub hsync_max: usize,
pub vsync_min: usize,
}
impl<I> SyncSeparator<I> {
pub fn new(inner: I, sample_rate: f32, sync_threshold: f32) -> Self {
// µs -> samples
let us = |micros: f32| (micros * sample_rate / 1_000_000.0) as usize;
Self {
inner,
state: SyncState::Active,
sync_threshold,
hsync_min: us(3.5),
hsync_max: us(6.0),
vsync_min: us(25.0),
}
}
pub fn process_sample(&mut self, sample: Sample) -> Option<SyncEvent> {
match self.state {
SyncState::Active => {
if sample < self.sync_threshold {
self.state = SyncState::InPulse { count: 1 };
None
} else {
Some(SyncEvent::VideoSample(sample))
}
}
SyncState::InPulse { ref mut count } => {
if sample < self.sync_threshold {
*count += 1;
None
} else {
let pulse_len = *count;
self.state = SyncState::Active;
if pulse_len >= self.vsync_min {
Some(SyncEvent::VSync)
} else if pulse_len >= self.hsync_min && pulse_len <= self.hsync_max {
Some(SyncEvent::HSync)
} else {
None
}
}
}
}
}
}
impl<I, E> Iterator for SyncSeparator<I>
where
I: Iterator<Item = Result<Sample, E>>,
{
type Item = Result<SyncEvent, E>;
fn next(&mut self) -> Option<Self::Item> {
loop {
match self.inner.next()? {
Ok(sample) => {
if let Some(event) = self.process_sample(sample) {
return Some(Ok(event));
}
}
Err(e) => return Some(Err(e)),
}
}
}
}