加上频谱图

Signed-off-by: TRADER_FOER <lhf190@outlook.com>

Assets/Scripts/DynamicUI/Timeline/Timeline.cs

@@ -36,7 +36,16 @@ namespace Ichni.Editor
 
         private string BeatText;
         private string TimeText;
+        private AudioMelSpectrogram _audioMelSpectrogram = new();
 
+        /// <summary>Mel 频谱图渲染目标 RawImage。请在 Inspector 中指定 Timeline 下的 RawImage 子对象。</summary>
+        public RawImage spectrogramTarget;
+
+        /// <summary>可选的频谱图颜色渐变。为 null 时使用 AudioMelSpectrogram 内置默认渐变。</summary>
+        public Gradient spectrogramGradient;
+
+        /// <summary>频谱图纹理分辨率缩放。0.5 = 半分辨率。</summary>
+        [Range(0.1f, 1f)] public float spectrogramResolutionScale = 0.5f;
 
         protected override void Start()
         {
@@ -50,6 +59,14 @@ namespace Ichni.Editor
                 UpdateTime();
             });
 
+            // ── 初始化 Mel 频谱图 ──
+            if (_audioMelSpectrogram != null)
+            {
+                _audioMelSpectrogram.targetImage = spectrogramTarget;
+                _audioMelSpectrogram.resolutionScale = spectrogramResolutionScale;
+                if (spectrogramGradient != null)
+                    _audioMelSpectrogram.colorGradient = spectrogramGradient;
+            }
         }
         public void Update()
         {
@@ -65,7 +82,16 @@ namespace Ichni.Editor
                 DetectPointer();
             }
 
-
+            // ── Mel 频谱图每帧刷新 ──
+            if (_audioMelSpectrogram != null && musicPlayer != null && musicPlayer.audioSource != null && timePointerModule != null)
+            {
+                float visibleWidth = spectrogramTarget != null
+                    ? spectrogramTarget.rectTransform.rect.width
+                    : GetComponent<RectTransform>().rect.width;
+                float visTimeRange = Mathf.Max(1f, visibleWidth / timePointerModule.timePointerInterval * timePerBeat);
+                _audioMelSpectrogram.UpdateView(musicPlayer.audioSource,
+                    songTime, songTime + visTimeRange);
+            }
         }
         private void DetectSetRange()
         {