ffmpeg implemented

src-tauri/src/player.rs

@@ -118,9 +118,20 @@ fn ffmpeg_command() -> OsString {
     let local_name = if cfg!(windows) { "ffmpeg.exe" } else { "ffmpeg" };
     if let Ok(exe) = std::env::current_exe() {
         if let Some(dir) = exe.parent() {
-            let candidate = dir.join(local_name);
-            if candidate.exists() {
-                return candidate.into_os_string();
+            // Common locations depending on bundler/platform.
+            let candidates = [
+                dir.join(local_name),
+                // Some packagers place resources in a sibling folder.
+                dir.join("resources").join(local_name),
+                dir.join("Resources").join(local_name),
+                // Or one level above.
+                dir.join("..").join("resources").join(local_name),
+                dir.join("..").join("Resources").join(local_name),
+            ];
+            for candidate in candidates {
+                if candidate.exists() {
+                    return candidate.into_os_string();
+                }
             }
         }
     }
@@ -128,6 +139,36 @@ fn ffmpeg_command() -> OsString {
     OsString::from(local_name)
 }
 
+pub fn preflight_check() -> Result<(), String> {
+    // Ensure we have an output device up-front so UI gets a synchronous error.
+    let host = cpal::default_host();
+    let device = host
+        .default_output_device()
+        .ok_or_else(|| "No default audio output device".to_string())?;
+    let _ = device
+        .default_output_config()
+        .map_err(|e| format!("Failed to get output config: {e}"))?;
+
+    // Ensure ffmpeg can be executed.
+    let ffmpeg = ffmpeg_command();
+    let status = Command::new(&ffmpeg)
+        .arg("-version")
+        .stdout(Stdio::null())
+        .stderr(Stdio::null())
+        .status()
+        .map_err(|e| {
+            let ffmpeg_disp = ffmpeg.to_string_lossy();
+            format!(
+                "FFmpeg not available ({ffmpeg_disp}): {e}. Set RADIOPLAYER_FFMPEG, bundle ffmpeg next to the app, or install ffmpeg on PATH."
+            )
+        })?;
+    if !status.success() {
+        return Err("FFmpeg exists but returned non-zero for -version".to_string());
+    }
+
+    Ok(())
+}
+
 struct Pipeline {
     stop_flag: Arc<AtomicBool>,
     volume_bits: Arc<AtomicU32>,