From ec0bc289295b46ac82d09a362e10fd3890cf5baa Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Piotr=20Stefa=C5=84ski?= <stefanskipiotr15@gmail.com>
Date: Sat, 23 May 2026 19:05:48 +0200
Subject: [PATCH] Split decode, decode_to_motec

---
 libsvld/src/lib.rs  | 52 ++++++++++++++++++++++++++++++++-------------
 svldcli/src/main.rs |  2 +-
 svldgui/src/main.rs |  2 +-
 3 files changed, 39 insertions(+), 17 deletions(-)

diff --git a/libsvld/src/lib.rs b/libsvld/src/lib.rs
index fa04a80..57bed30 100644
--- a/libsvld/src/lib.rs
+++ b/libsvld/src/lib.rs
@@ -164,9 +164,15 @@ pub struct DecodeProcessInfo {
     pub chunk_size: usize,
 }
 
+pub struct DecodeResult {
+    pub data: HashMap<CanId, Vec<CanFrame>>,
+    pub metadata: HashMap<CanId, MessageMetadata>,
+
+    pub info: DecodeProcessInfo,
+}
+
 pub fn decode(dbc: &Dbc,
-              asc_path: &Path,
-              output_dir: &Path) -> DecodeProcessInfo {
+              asc_path: &Path) -> DecodeResult {
     let thread_count = std::thread::available_parallelism().unwrap().get();
 
     let file = File::open(asc_path).unwrap();
@@ -178,10 +184,6 @@ pub fn decode(dbc: &Dbc,
     mmap.advise(Advice::WillNeed).unwrap();
 
     let date = parse_asc_date(&mmap[..memchr::memchr(b'\r', &mmap).unwrap()]).unwrap();
-
-    let date_str = date
-        .and_utc()
-        .to_rfc3339_opts(chrono::SecondsFormat::Secs, true);
     // println!("Date: {}", date);
 
     let page_size = page_size::get();
@@ -253,8 +255,36 @@ pub fn decode(dbc: &Dbc,
     // println!("{:?}", unknown_ids);
     // println!("{:?}", error_frames);
 
+    DecodeResult {
+        data,
+        metadata,
+        info: DecodeProcessInfo {
+            unknown_ids,
+            error_frames,
+            date,
+            thread_count,
+            page_size,
+            pages_per_chunk,
+            chunk_size,
+        }
+    }
+}
+
+pub fn decode_to_motec(dbc: &Dbc,
+                       asc_path: &Path,
+                       output_dir: &Path) -> DecodeProcessInfo {
+    let DecodeResult {
+        mut data,
+        metadata,
+        info,
+    } = decode(dbc, asc_path);
+
     println!("Post processing");
 
+    let date_str = info.date
+        .and_utc()
+        .to_rfc3339_opts(chrono::SecondsFormat::Secs, true);
+
     for (_, frames) in &mut data {
         // frames.voracious_mt_sort(thread_count);
         frames.voracious_sort();
@@ -271,13 +301,5 @@ pub fn decode(dbc: &Dbc,
     motec::write(&output_dir.join(out_name), &msgs, data);
     println!("Finished!");
 
-    DecodeProcessInfo {
-        unknown_ids,
-        error_frames,
-        date,
-        thread_count,
-        page_size,
-        pages_per_chunk,
-        chunk_size,
-    }
+    info
 }
diff --git a/svldcli/src/main.rs b/svldcli/src/main.rs
index b2167e4..673ba27 100644
--- a/svldcli/src/main.rs
+++ b/svldcli/src/main.rs
@@ -12,5 +12,5 @@ fn main() {
     let asc_path = Path::new(&args[2]);
     let output_dir = Path::new(&args[3]);
 
-    libsvld::decode(&dbc, asc_path, output_dir);
+    libsvld::decode_to_motec(&dbc, asc_path, output_dir);
 }
diff --git a/svldgui/src/main.rs b/svldgui/src/main.rs
index ffcad24..f2847cb 100644
--- a/svldgui/src/main.rs
+++ b/svldgui/src/main.rs
@@ -317,7 +317,7 @@ fn main() {
                         .map_err(|e| format!("Failed to parse DBC: {:?}", e))?;
                     let mut out = Vec::with_capacity(total);
                     for (i, asc) in asc_paths.iter().enumerate() {
-                        let info = libsvld::decode(&dbc, asc, &output_dir);
+                        let info = libsvld::decode_to_motec(&dbc, asc, &output_dir);
                         out.push(build_file_result(asc, info));
                         let done = i + 1;
                         let w = window_weak.clone();