feat: add ffmpeg plugin and update plugin interface to support temporary directories and context-dependent metrics

plugins/png_to_jpeg.rs

@@ -1,18 +1,51 @@
+// Copyright (C) 2026 Elias Wendland <eliaswendland@pm.me>
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, version 3 exclusively.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
 use crate::plugin::Plugin;
 use image::ImageFormat;
 use std::io::Cursor;
+use std::path::Path;
 
 pub struct PluginImpl;
 
 impl Plugin for PluginImpl {
-    fn name(&self) -> &'static str { "png_to_jpeg" }
-    fn from_formats(&self) -> Vec<&'static str> { vec!["png"] }
-    fn to_formats(&self) -> Vec<&'static str> { vec!["jpeg"] }
-    fn familiarity(&self) -> u8 { 255 }
-    fn quality(&self) -> u8 { 200 } // JPEG has some compression loss
-    fn speed(&self) -> u8 { 220 }
-    
-    fn convert(&self, input: &[u8], _from: &str, _to: &str) -> Result<Vec<u8>, String> {
+    fn name(&self) -> &'static str {
+        "png_to_jpeg"
+    }
+    fn from_formats(&self) -> Vec<&'static str> {
+        vec!["png"]
+    }
+    fn to_formats(&self) -> Vec<&'static str> {
+        vec!["jpeg"]
+    }
+    fn familiarity(&self, _from: &str, _to: &str) -> u8 {
+        255
+    }
+    fn quality(&self, _from: &str, _to: &str) -> u8 {
+        200
+    } // JPEG has some compression loss
+    fn speed(&self, _from: &str, _to: &str) -> u8 {
+        220
+    }
+
+    fn convert(
+        &self,
+        input: &[u8],
+        _from: &str,
+        _to: &str,
+        _temp_dir: &Path,
+    ) -> Result<Vec<u8>, String> {
         let img = image::load_from_memory_with_format(input, ImageFormat::Png)
             .map_err(|e| e.to_string())?;
         let mut buf = Vec::new();