From a438981ad5a041cd0069cdcd63eb24aeb2d49c70 Mon Sep 17 00:00:00 2001
From: Warren Lo <warren@accusys.com.tw>
Date: Thu, 19 Mar 2026 00:31:26 +0800
Subject: [PATCH] Add audio.rs for audio playback

---
 src/player/audio.rs | 84 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 84 insertions(+)
 create mode 100644 src/player/audio.rs

diff --git a/src/player/audio.rs b/src/player/audio.rs
new file mode 100644
index 0000000..976252d
--- /dev/null
+++ b/src/player/audio.rs
@@ -0,0 +1,84 @@
+//! 音頻播放模組
+
+use anyhow::Result;
+use std::process::{Command, Stdio};
+use std::io::Write;
+use std::sync::{Arc, Mutex};
+
+#[derive(Debug, Clone)]
+pub struct AudioPlayer {
+    process: Option<std::process::Child>,
+    volume: f32,
+    muted: bool,
+}
+
+impl AudioPlayer {
+    pub fn new() -> Self {
+        Self {
+            process: None,
+            volume: 1.0,
+            muted: false,
+        }
+    }
+
+    pub fn play(&mut self, path: &str, start_ms: u64) -> Result<()> {
+        self.stop()?;
+        
+        let start_sec = start_ms as f64 / 1000.0;
+        let volume_filter = if self.muted {
+            "volume=0".to_string()
+        } else {
+            format!("volume={}", self.volume)
+        };
+        
+        let mut cmd = Command::new("ffplay");
+        cmd.args([
+            "-nodisp",
+            "-autoexit",
+            "-ss", &format!("{}", start_sec),
+            "-af", &volume_filter,
+            "-i", path,
+        ])
+        .stdin(Stdio::null())
+        .stdout(Stdio::null())
+        .stderr(Stdio::null())
+        .spawn()?;
+        
+        self.process = Some(cmd);
+        Ok(())
+    }
+
+    pub fn stop(&mut self) -> Result<()> {
+        if let Some(mut child) = self.process.take() {
+            let _ = child.kill();
+            let _ = child.wait();
+        }
+        Ok(())
+    }
+
+    pub fn set_volume(&mut self, volume: f32) {
+        self.volume = volume.clamp(0.0, 1.0);
+        if !self.muted {
+            self.restart_with_volume()?;
+        }
+    }
+
+    pub fn toggle_mute(&mut self) -> bool {
+        self.muted = !self.muted;
+        self.muted
+    }
+
+    pub fn is_muted(&self) -> bool {
+        self.muted
+    }
+
+    fn restart_with_volume(&mut self) -> Result<()> {
+        Ok(())
+    }
+}
+
+impl Drop for AudioPlayer {
+    fn drop(&mut self) {
+        let _ = self.stop();
+    }
+}