performance improvement

sam-tool-tauri/src-tauri/src/settings.rs

@@ -15,6 +15,15 @@ pub struct Settings {
     pub sam_model: Option<String>,
     #[serde(default = "default_cache_capacity")]
     pub cache_capacity: usize,
+    /// ffmpeg `-hwaccel` argument. Empty string = software decode (default).
+    /// Recognized: "auto", "vaapi", "cuda", "vdpau". Applied on next
+    /// `open_video` or worker respawn.
+    #[serde(default)]
+    pub hwaccel: String,
+    /// Decimation factor used by playback (advance by N frames per tick) and
+    /// bulk extract (take every Nth frame in range). 1 = no decimation.
+    #[serde(default = "default_frame_skip")]
+    pub frame_skip: u64,
 }
 
 fn default_sam_url() -> String {
@@ -25,11 +34,18 @@ fn default_cache_capacity() -> usize {
     crate::decoder::DEFAULT_CACHE_CAPACITY
 }
 
+fn default_frame_skip() -> u64 {
+    1
+}
+
 fn normalize(mut s: Settings) -> Settings {
     s.cache_capacity = s.cache_capacity.clamp(
         crate::decoder::MIN_CACHE_CAPACITY,
         crate::decoder::MAX_CACHE_CAPACITY,
     );
+    if s.frame_skip < 1 {
+        s.frame_skip = 1;
+    }
     s
 }
 
@@ -40,6 +56,8 @@ impl Default for Settings {
             sam_enabled: false,
             sam_model: None,
             cache_capacity: default_cache_capacity(),
+            hwaccel: String::new(),
+            frame_skip: default_frame_skip(),
         }
     }
 }