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[refactor](trx-wxsat): unify image encoding to shared PNG module

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Extract common image_enc module at crate root with encode_grayscale_png
and encode_rgb_png helpers. Both NOAA APT and Meteor-M LRPT now use PNG
as the output format through the shared encoder. Drop jpeg image feature
dependency.

https://claude.ai/code/session_01JA13DHuzuHUL4nSBBRU83f
Signed-off-by: Claude <noreply@anthropic.com>
This commit is contained in:
Claude
2026-03-28 09:10:07 +00:00
committed by Stan Grams
parent 1a3b815ed8
commit 4d40c29e49
9 changed files with 63 additions and 60 deletions
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src/trx-server/src/audio.rs
+7 -7
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@@ -2453,8 +2453,8 @@ pub async fn run_wspr_decoder(
///
/// The task is idle until `state.wxsat_decode_enabled` becomes `true`.
/// When the user disables the decoder (or 30 s of silence elapses with no
/// new decoded lines), the accumulated image is encoded as JPEG and saved to
/// `output_dir/<YYYY-MM-DD_HH-MM-SS>.jpg`.
/// new decoded lines), the accumulated image is encoded as PNG and saved to
/// `output_dir/<YYYY-MM-DD_HH-MM-SS>.png`.
pub async fn run_wxsat_decoder(
sample_rate: u32,
channels: u16,
@@ -2581,7 +2581,7 @@ pub async fn run_wxsat_decoder(
}
}
/// Encode all accumulated lines as JPEG, write to disk, and broadcast the
/// Encode all accumulated lines as PNG, write to disk, and broadcast the
/// `DecodedMessage::WxsatImage` event. No-ops if fewer than 2 lines decoded.
async fn finalize_wxsat_pass(
decoder: &mut AptDecoder,
@@ -2601,9 +2601,9 @@ async fn finalize_wxsat_pass(
return;
};
// Build output path: <output_dir>/<YYYY-MM-DD_HH-MM-SS>.jpg
// Build output path: <output_dir>/<YYYY-MM-DD_HH-MM-SS>.png
let dt = chrono::Local::now();
let filename = dt.format("%Y-%m-%d_%H-%M-%S.jpg").to_string();
let filename = dt.format("%Y-%m-%d_%H-%M-%S.png").to_string();
let path = output_dir.join(&filename);
if let Err(e) = std::fs::create_dir_all(output_dir) {
@@ -2615,7 +2615,7 @@ async fn finalize_wxsat_pass(
return;
}
match std::fs::write(&path, &apt_image.jpeg) {
match std::fs::write(&path, &apt_image.png) {
Ok(()) => {
let sat_str = format!("{}", apt_image.satellite);
let ch_a_str = format!("{}", apt_image.sensor_a);
@@ -2624,7 +2624,7 @@ async fn finalize_wxsat_pass(
"wxsat: saved {} ({} lines, {} bytes, {}, A={}, B={}) to {:?}",
filename,
apt_image.line_count,
apt_image.jpeg.len(),
apt_image.png.len(),
sat_str,
ch_a_str,
ch_b_str,